zlib 1.2.3.6
This commit is contained in:
Mark Adler
parent
d004b04783
commit
dc5a43ebfa
@ -21,7 +21,6 @@ check_include_file(stddef.h HAVE_STDDEF_H)
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# Check to see if we have large file support
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#
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set(CMAKE_REQUIRED_DEFINITIONS -D_LARGEFILE64_SOURCE)
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# We add these other definitions here because CheckTypeSize.cmake
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# in CMake 2.4.x does not automatically do so and we want
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# compatibility with CMake 2.4.x.
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@ -34,9 +33,7 @@ endif()
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if(HAVE_STDDEF_H)
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list(APPEND CMAKE_REQUIRED_DEFINITIONS -DHAVE_STDDEF_H)
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endif()
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check_type_size(off64_t OFF64_T)
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if(HAVE_OFF64_T)
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add_definitions(-D_LARGEFILE64_SOURCE)
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endif()
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@ -62,23 +59,6 @@ if(NOT HAVE_ERRNO_H)
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add_definitions(-DNO_ERRNO_H)
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endif()
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#
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# Check for mmap support
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#
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set(mmap_test_code "
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#include <sys/types.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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caddr_t hello() {
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return mmap((caddr_t)0, (off_t)0, PROT_READ, MAP_SHARED, 0, (off_t)0);
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}
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int main() { return 0; }
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")
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check_c_source_compiles("${mmap_test_code}" USE_MMAP)
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if(USE_MMAP)
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add_definitions(-DUSE_MMAP)
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endif()
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#
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# Create the zlibdefs.h file.
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# Note: we create it in CMAKE_CURRENT_SOURCE_DIR instead
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@ -88,7 +68,7 @@ configure_file(${CMAKE_CURRENT_SOURCE_DIR}/zlibdefs.h.cmakein
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${CMAKE_CURRENT_SOURCE_DIR}/zlibdefs.h)
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if(MSVC)
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set(CMAKE_DEBUG_POSTFIX "D")
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set(CMAKE_DEBUG_POSTFIX "d")
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add_definitions(-D_CRT_SECURE_NO_DEPRECATE)
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add_definitions(-D_CRT_NONSTDC_NO_DEPRECATE)
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endif()
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@ -130,15 +110,47 @@ set(ZLIB_SRCS
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trees.c
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uncompr.c
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zutil.c
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win32/zlib1.rc
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)
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# parse the full version number from zlib.h and include in ZLIB_FULL_VERSION
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file(READ ${CMAKE_CURRENT_SOURCE_DIR}/zlib.h _zlib_h_contents)
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string(REGEX REPLACE ".*#define[ \t]+ZLIB_VERSION[ \t]+\"([0-9A-Za-z.]+)\".*"
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"\\1" ZLIB_FULL_VERSION ${_zlib_h_contents})
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if(MINGW)
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# This gets us DLL resource information when compiling on MinGW.
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add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/zlib1rc.obj
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COMMAND windres.exe
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-D GCC_WINDRES
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-I ${CMAKE_CURRENT_SOURCE_DIR}
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-o ${CMAKE_CURRENT_BINARY_DIR}/zlib1rc.obj
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-i ${CMAKE_CURRENT_SOURCE_DIR}/win32/zlib1.rc)
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set(ZLIB_SRCS ${ZLIB_SRCS} ${CMAKE_CURRENT_BINARY_DIR}/zlib1rc.obj)
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endif(MINGW)
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add_library(zlib ${ZLIB_SRCS} ${ZLIB_PUBLIC_HDRS} ${ZLIB_PRIVATE_HDRS})
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set_target_properties(zlib PROPERTIES DEFINE_SYMBOL ZLIB_DLL)
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set_target_properties(zlib PROPERTIES VERSION 1.2.3.4)
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set_target_properties(zlib PROPERTIES SOVERSION 1)
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if(NOT CYGWIN)
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# This property causes shared libraries on Linux to have the full version
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# encoded into their final filename. We disable this on Cygwin because
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# it causes cygz-${ZLIB_FULL_VERSION}.dll to be created when cygz.dll
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# seems to be the default.
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#
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# This has no effect with MSVC, on that platform the version info for
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# the DLL comes from the resource file win32/zlib1.rc
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set_target_properties(zlib PROPERTIES VERSION ${ZLIB_FULL_VERSION})
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endif()
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if(UNIX)
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# On unix like platforms the library is almost always called libz
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# On unix-like platforms the library is almost always called libz
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set_target_properties(zlib PROPERTIES OUTPUT_NAME z)
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elseif(BUILD_SHARED_LIBS AND WIN32)
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# Creates zlib1.dll when building shared library version
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set_target_properties(zlib PROPERTIES SUFFIX "1.dll")
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endif()
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if(NOT SKIP_INSTALL_LIBRARIES AND NOT SKIP_INSTALL_ALL )
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22
ChangeLog
22
ChangeLog
@ -1,6 +1,27 @@
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ChangeLog file for zlib
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Changes in 1.2.3.6 (17 Jan 2010)
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- Avoid void * arithmetic in gzread.c and gzwrite.c
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- Make compilers happier with const char * for gz_error message
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- Avoid unused parameter warning in inflate.c
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- Avoid signed-unsigned comparison warning in inflate.c
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- Indent #pragma's for traditional C
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- Fix usage of strwinerror() in glib.c, change to gz_strwinerror()
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- Correct email address in configure for system options
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- Update make_vms.com and add make_vms.com to contrib/minizip [Zinser]
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- Update zlib.map [Brown]
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- Fix Makefile.in for Solaris 10 make of example64 and minizip64 [Tšršk]
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- Apply various fixes to CMakeLists.txt [Lowman]
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- Add checks on len in gzread() and gzwrite()
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- Add error message for no more room for gzungetc()
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- Remove zlib version check in gzwrite()
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- Defer compression of gzprintf() result until need to
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- Use snprintf() in gzdopen() if available
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- Remove USE_MMAP configuration determination (only used by minigzip)
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- Remove examples/pigz.c (available separately)
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- Update examples/gun.c to 1.6
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Changes in 1.2.3.5 (8 Jan 2010)
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- Add space after #if in zutil.h for some compilers
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- Fix relatively harmless bug in deflate_fast() [Exarevsky]
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@ -21,6 +42,7 @@ Changes in 1.2.3.5 (8 Jan 2010)
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- Replace gzio.c with a new set of routines with the same functionality
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- Add gzbuffer(), gzoffset(), gzclose_r(), gzclose_w() as part of above
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- Update contrib/minizip to 1.1b
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- Change gzeof() to return 0 on error instead of -1 to agree with zlib.h
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Changes in 1.2.3.4 (21 Dec 2009)
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- Use old school .SUFFIXES in Makefile.in for FreeBSD compatibility
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8
Makefile
8
Makefile
@ -1,5 +1,5 @@
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# Makefile for zlib
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# Copyright (C) 1995-2006 Jean-loup Gailly.
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# Copyright (C) 1995-2010 Jean-loup Gailly.
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# For conditions of distribution and use, see copyright notice in zlib.h
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# To compile and test, type:
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@ -32,7 +32,7 @@ CPP=$(CC) -E
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STATICLIB=libz.a
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SHAREDLIB=libz.so
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SHAREDLIBV=libz.so.1.2.3.5
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SHAREDLIBV=libz.so.1.2.3.6
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SHAREDLIBM=libz.so.1
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LIBS=$(STATICLIB) $(SHAREDLIB) $(SHAREDLIBV)
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@ -124,10 +124,10 @@ match.lo: match.S
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rm -f _match.s
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example64.o: example.c zlib.h zconf.h zlibdefs.h
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$(CC) $(CFLAGS) -D_FILE_OFFSET_BITS=64 -c -o $@ $<
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$(CC) $(CFLAGS) -D_FILE_OFFSET_BITS=64 -c -o $@ example.c
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minigzip64.o: minigzip.c zlib.h zconf.h zlibdefs.h
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$(CC) $(CFLAGS) -D_FILE_OFFSET_BITS=64 -c -o $@ $<
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$(CC) $(CFLAGS) -D_FILE_OFFSET_BITS=64 -c -o $@ minigzip.c
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.SUFFIXES: .lo
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@ -1,5 +1,5 @@
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# Makefile for zlib
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# Copyright (C) 1995-2006 Jean-loup Gailly.
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# Copyright (C) 1995-2010 Jean-loup Gailly.
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# For conditions of distribution and use, see copyright notice in zlib.h
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# To compile and test, type:
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@ -32,7 +32,7 @@ CPP=$(CC) -E
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STATICLIB=libz.a
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SHAREDLIB=libz.so
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SHAREDLIBV=libz.so.1.2.3.5
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SHAREDLIBV=libz.so.1.2.3.6
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SHAREDLIBM=libz.so.1
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LIBS=$(STATICLIB) $(SHAREDLIB) $(SHAREDLIBV)
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@ -124,10 +124,10 @@ match.lo: match.S
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rm -f _match.s
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example64.o: example.c zlib.h zconf.h zlibdefs.h
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$(CC) $(CFLAGS) -D_FILE_OFFSET_BITS=64 -c -o $@ $<
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$(CC) $(CFLAGS) -D_FILE_OFFSET_BITS=64 -c -o $@ example.c
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minigzip64.o: minigzip.c zlib.h zconf.h zlibdefs.h
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$(CC) $(CFLAGS) -D_FILE_OFFSET_BITS=64 -c -o $@ $<
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$(CC) $(CFLAGS) -D_FILE_OFFSET_BITS=64 -c -o $@ minigzip.c
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.SUFFIXES: .lo
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4
README
4
README
@ -1,6 +1,6 @@
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ZLIB DATA COMPRESSION LIBRARY
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zlib 1.2.3.5 is a general purpose data compression library. All the code is
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zlib 1.2.3.6 is a general purpose data compression library. All the code is
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thread safe. The data format used by the zlib library is described by RFCs
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(Request for Comments) 1950 to 1952 in the files
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http://www.ietf.org/rfc/rfc1950.txt (zlib format), rfc1951.txt (deflate format)
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@ -33,7 +33,7 @@ Mark Nelson <markn@ieee.org> wrote an article about zlib for the Jan. 1997
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issue of Dr. Dobb's Journal; a copy of the article is available in
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http://dogma.net/markn/articles/zlibtool/zlibtool.htm
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The changes made in version 1.2.3.5 are documented in the file ChangeLog.
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The changes made in version 1.2.3.6 are documented in the file ChangeLog.
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Unsupported third party contributions are provided in directory "contrib".
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@ -1,7 +1,7 @@
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* ZLIB.INC - Interface to the general purpose compression library
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*
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* ILE RPG400 version by Patrick Monnerat, DATASPHERE.
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* Version 1.2.3.5
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* Version 1.2.3.6
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*
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*
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* WARNING:
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@ -22,8 +22,8 @@
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*
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* Versioning information.
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*
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D ZLIB_VERSION C '1.2.3.5'
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D ZLIB_VERNUM C X'1235'
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D ZLIB_VERSION C '1.2.3.6'
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D ZLIB_VERNUM C X'1236'
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*
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* Other equates.
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*
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25
configure
vendored
25
configure
vendored
@ -78,6 +78,9 @@ if test "$gcc" -eq 1 && ($cc -c $cflags $test.c) 2>/dev/null; then
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CC="$cc"
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SFLAGS="${CFLAGS-"-O3"} -fPIC"
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CFLAGS="${CFLAGS-"-O3"}"
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if test "${ZLIBGCCWARN}" = "YES"; then
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CFLAGS="${CFLAGS} -Wall -Wextra -pedantic"
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fi
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if test -z "$uname"; then
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uname=`(uname -s || echo unknown) 2>/dev/null`
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fi
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@ -154,8 +157,8 @@ else
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SunOS\ 4*) SFLAGS=${CFLAGS-"-O2 -PIC"}
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CFLAGS=${CFLAGS-"-O2"}
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LDSHARED=${LDSHARED-"ld"} ;;
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SunStudio\ 9*) SFLAGS=${CFLAGS-"-DUSE_MMAP -fast -xcode=pic32 -xtarget=ultra3 -xarch=v9b"}
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CFLAGS=${CFLAGS-"-DUSE_MMAP -fast -xtarget=ultra3 -xarch=v9b"}
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SunStudio\ 9*) SFLAGS=${CFLAGS-"-fast -xcode=pic32 -xtarget=ultra3 -xarch=v9b"}
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CFLAGS=${CFLAGS-"-fast -xtarget=ultra3 -xarch=v9b"}
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LDSHARED=${LDSHARED-"cc -xarch=v9b"} ;;
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UNIX_System_V\ 4.2.0)
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SFLAGS=${CFLAGS-"-KPIC -O"}
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@ -173,7 +176,7 @@ else
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SFLAGS=${CFLAGS-"-O -qmaxmem=8192"}
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CFLAGS=${CFLAGS-"-O -qmaxmem=8192"}
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LDSHARED=${LDSHARED-"xlc -G"} ;;
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# send working options for other systems to support@gzip.org
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# send working options for other systems to zlib@gzip.org
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*) SFLAGS=${CFLAGS-"-O"}
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CFLAGS=${CFLAGS-"-O"}
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LDSHARED=${LDSHARED-"cc -shared"} ;;
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@ -488,22 +491,6 @@ else
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SFLAGS="$SFLAGS -DNO_ERRNO_H"
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fi
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cat > $test.c <<EOF
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#include <sys/types.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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caddr_t hello() {
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return mmap((caddr_t)0, (off_t)0, PROT_READ, MAP_SHARED, 0, (off_t)0);
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}
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EOF
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if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
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CFLAGS="$CFLAGS -DUSE_MMAP"
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SFLAGS="$SFLAGS -DUSE_MMAP"
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echo Checking for mmap support... Yes.
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else
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echo Checking for mmap support... No.
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fi
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CPP=${CPP-"$CC -E"}
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case $CFLAGS in
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*ASMV*)
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@ -1,5 +1,5 @@
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/* inftree9.c -- generate Huffman trees for efficient decoding
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* Copyright (C) 1995-2008 Mark Adler
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* Copyright (C) 1995-2010 Mark Adler
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* For conditions of distribution and use, see copyright notice in zlib.h
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*/
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@ -9,7 +9,7 @@
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#define MAXBITS 15
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const char inflate9_copyright[] =
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" inflate9 1.2.3.5 Copyright 1995-2009 Mark Adler ";
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" inflate9 1.2.3.6 Copyright 1995-2010 Mark Adler ";
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/*
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If you use the zlib library in a product, an acknowledgment is welcome
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in the documentation of your product. If for some reason you cannot
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@ -64,7 +64,7 @@ unsigned short FAR *work;
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static const unsigned short lext[31] = { /* Length codes 257..285 extra */
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128, 128, 128, 128, 128, 128, 128, 128, 129, 129, 129, 129,
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130, 130, 130, 130, 131, 131, 131, 131, 132, 132, 132, 132,
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133, 133, 133, 133, 144, 69, 199};
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133, 133, 133, 133, 144, 199, 70};
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static const unsigned short dbase[32] = { /* Distance codes 0..31 base */
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1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49,
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65, 97, 129, 193, 257, 385, 513, 769, 1025, 1537, 2049, 3073,
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25
contrib/minizip/make_vms.com
Normal file
25
contrib/minizip/make_vms.com
Normal file
@ -0,0 +1,25 @@
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$ if f$search("ioapi.h_orig") .eqs. "" then copy ioapi.h ioapi.h_orig
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$ open/write zdef vmsdefs.h
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$ copy sys$input: zdef
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$ deck
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#define unix
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#define fill_zlib_filefunc64_32_def_from_filefunc32 fillzffunc64from
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#define Write_Zip64EndOfCentralDirectoryLocator Write_Zip64EoDLocator
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#define Write_Zip64EndOfCentralDirectoryRecord Write_Zip64EoDRecord
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#define Write_EndOfCentralDirectoryRecord Write_EoDRecord
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$ eod
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$ close zdef
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$ copy vmsdefs.h,ioapi.h_orig ioapi.h
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$ cc/include=[--]/prefix=all ioapi.c
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$ cc/include=[--]/prefix=all miniunz.c
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$ cc/include=[--]/prefix=all unzip.c
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$ cc/include=[--]/prefix=all minizip.c
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$ cc/include=[--]/prefix=all zip.c
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$ link miniunz,unzip,ioapi,[--]libz.olb/lib
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$ link minizip,zip,ioapi,[--]libz.olb/lib
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$ mcr []minizip test minizip64_info.txt
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$ mcr []miniunz -l test.zip
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$ rename minizip64_info.txt; minizip64_info.txt_old
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$ mcr []miniunz test.zip
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$ delete test.zip;*
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$exit
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@ -2,8 +2,8 @@
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#define IDR_VERSION1 1
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IDR_VERSION1 VERSIONINFO MOVEABLE IMPURE LOADONCALL DISCARDABLE
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FILEVERSION 1,2,3,5
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PRODUCTVERSION 1,2,3,5
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FILEVERSION 1,2,3,6
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PRODUCTVERSION 1,2,3,6
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FILEFLAGSMASK VS_FFI_FILEFLAGSMASK
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FILEFLAGS 0
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FILEOS VOS_DOS_WINDOWS32
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@ -17,12 +17,12 @@ BEGIN
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BEGIN
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VALUE "FileDescription", "zlib data compression library\0"
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VALUE "FileVersion", "1.2.3.5\0"
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VALUE "FileVersion", "1.2.3.6\0"
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VALUE "InternalName", "zlib\0"
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VALUE "OriginalFilename", "zlib.dll\0"
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VALUE "ProductName", "ZLib.DLL\0"
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VALUE "Comments","DLL support by Alessandro Iacopetti & Gilles Vollant\0"
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VALUE "LegalCopyright", "(C) 1995-2006 Jean-loup Gailly & Mark Adler\0"
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VALUE "LegalCopyright", "(C) 1995-2010 Jean-loup Gailly & Mark Adler\0"
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END
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END
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BLOCK "VarFileInfo"
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@ -52,7 +52,7 @@
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#include "deflate.h"
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const char deflate_copyright[] =
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" deflate 1.2.3.5 Copyright 1995-2010 Jean-loup Gailly and Mark Adler ";
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" deflate 1.2.3.6 Copyright 1995-2010 Jean-loup Gailly and Mark Adler ";
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/*
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If you use the zlib library in a product, an acknowledgment is welcome
|
||||
in the documentation of your product. If for some reason you cannot
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@ -34,12 +34,6 @@ gzlog.h
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and deflateSetDictionary()
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- illustrates use of a gzip header extra field
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pigz.c
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parallel implementation of gzip compression
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- uses pthreads to speed up compression on multiple core machines
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||||
- illustrates the use of deflateSetDictionary() with raw deflate
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- illustrates the use of crc32_combine()
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zlib_how.html
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painfully comprehensive description of zpipe.c (see below)
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- describes in excruciating detail the use of deflate() and inflate()
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||||
@ -1,7 +1,7 @@
|
||||
/* gun.c -- simple gunzip to give an example of the use of inflateBack()
|
||||
* Copyright (C) 2003, 2005 Mark Adler
|
||||
* Copyright (C) 2003, 2005, 2008, 2010 Mark Adler
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
Version 1.3 12 June 2005 Mark Adler */
|
||||
Version 1.6 17 January 2010 Mark Adler */
|
||||
|
||||
/* Version history:
|
||||
1.0 16 Feb 2003 First version for testing of inflateBack()
|
||||
@ -15,6 +15,9 @@
|
||||
1.2 20 Mar 2005 Add Unix compress (LZW) decompression
|
||||
Copy file attributes from input file to output file
|
||||
1.3 12 Jun 2005 Add casts for error messages [Oberhumer]
|
||||
1.4 8 Dec 2006 LZW decompression speed improvements
|
||||
1.5 9 Feb 2008 Avoid warning in latest version of gcc
|
||||
1.6 17 Jan 2010 Avoid signed/unsigned comparison warnings
|
||||
*/
|
||||
|
||||
/*
|
||||
@ -197,14 +200,14 @@ local int lunpipe(unsigned have, unsigned char *next, struct ind *indp,
|
||||
int outfile, z_stream *strm)
|
||||
{
|
||||
int last; /* last byte read by NEXT(), or -1 if EOF */
|
||||
int chunk; /* bytes left in current chunk */
|
||||
unsigned chunk; /* bytes left in current chunk */
|
||||
int left; /* bits left in rem */
|
||||
unsigned rem; /* unused bits from input */
|
||||
int bits; /* current bits per code */
|
||||
unsigned code; /* code, table traversal index */
|
||||
unsigned mask; /* mask for current bits codes */
|
||||
int max; /* maximum bits per code for this stream */
|
||||
int flags; /* compress flags, then block compress flag */
|
||||
unsigned flags; /* compress flags, then block compress flag */
|
||||
unsigned end; /* last valid entry in prefix/suffix tables */
|
||||
unsigned temp; /* current code */
|
||||
unsigned prev; /* previous code */
|
||||
@ -212,6 +215,7 @@ local int lunpipe(unsigned have, unsigned char *next, struct ind *indp,
|
||||
unsigned stack; /* next position for reversed string */
|
||||
unsigned outcnt; /* bytes in output buffer */
|
||||
struct outd outd; /* output structure */
|
||||
unsigned char *p;
|
||||
|
||||
/* set up output */
|
||||
outd.outfile = outfile;
|
||||
@ -322,10 +326,12 @@ local int lunpipe(unsigned have, unsigned char *next, struct ind *indp,
|
||||
}
|
||||
|
||||
/* walk through linked list to generate output in reverse order */
|
||||
p = match + stack;
|
||||
while (code >= 256) {
|
||||
match[stack++] = suffix[code];
|
||||
*p++ = suffix[code];
|
||||
code = prefix[code];
|
||||
}
|
||||
stack = p - match;
|
||||
match[stack++] = (unsigned char)code;
|
||||
final = code;
|
||||
|
||||
@ -349,9 +355,11 @@ local int lunpipe(unsigned have, unsigned char *next, struct ind *indp,
|
||||
}
|
||||
outcnt = 0;
|
||||
}
|
||||
p = match + stack;
|
||||
do {
|
||||
outbuf[outcnt++] = match[--stack];
|
||||
} while (stack);
|
||||
outbuf[outcnt++] = *--p;
|
||||
} while (p > match);
|
||||
stack = 0;
|
||||
|
||||
/* loop for next code with final and prev as the last match, rem and
|
||||
left provide the first 0..7 bits of the next code, end is the last
|
||||
@ -375,7 +383,7 @@ local int gunpipe(z_stream *strm, int infile, int outfile)
|
||||
{
|
||||
int ret, first, last;
|
||||
unsigned have, flags, len;
|
||||
unsigned char *next;
|
||||
unsigned char *next = NULL;
|
||||
struct ind ind, *indp;
|
||||
struct outd outd;
|
||||
|
||||
@ -471,10 +479,10 @@ local int gunpipe(z_stream *strm, int infile, int outfile)
|
||||
|
||||
/* check trailer */
|
||||
ret = Z_BUF_ERROR;
|
||||
if (NEXT() != (outd.crc & 0xff) ||
|
||||
NEXT() != ((outd.crc >> 8) & 0xff) ||
|
||||
NEXT() != ((outd.crc >> 16) & 0xff) ||
|
||||
NEXT() != ((outd.crc >> 24) & 0xff)) {
|
||||
if (NEXT() != (int)(outd.crc & 0xff) ||
|
||||
NEXT() != (int)((outd.crc >> 8) & 0xff) ||
|
||||
NEXT() != (int)((outd.crc >> 16) & 0xff) ||
|
||||
NEXT() != (int)((outd.crc >> 24) & 0xff)) {
|
||||
/* crc error */
|
||||
if (last != -1) {
|
||||
strm->msg = (char *)"incorrect data check";
|
||||
@ -482,10 +490,10 @@ local int gunpipe(z_stream *strm, int infile, int outfile)
|
||||
}
|
||||
break;
|
||||
}
|
||||
if (NEXT() != (outd.total & 0xff) ||
|
||||
NEXT() != ((outd.total >> 8) & 0xff) ||
|
||||
NEXT() != ((outd.total >> 16) & 0xff) ||
|
||||
NEXT() != ((outd.total >> 24) & 0xff)) {
|
||||
if (NEXT() != (int)(outd.total & 0xff) ||
|
||||
NEXT() != (int)((outd.total >> 8) & 0xff) ||
|
||||
NEXT() != (int)((outd.total >> 16) & 0xff) ||
|
||||
NEXT() != (int)((outd.total >> 24) & 0xff)) {
|
||||
/* length error */
|
||||
if (last != -1) {
|
||||
strm->msg = (char *)"incorrect length check";
|
||||
@ -642,8 +650,8 @@ int main(int argc, char **argv)
|
||||
argv++;
|
||||
test = 0;
|
||||
if (argc && strcmp(*argv, "-h") == 0) {
|
||||
fprintf(stderr, "gun 1.3 (12 Jun 2005)\n");
|
||||
fprintf(stderr, "Copyright (c) 2005 Mark Adler\n");
|
||||
fprintf(stderr, "gun 1.6 (17 Jan 2010)\n");
|
||||
fprintf(stderr, "Copyright (C) 2003-2010 Mark Adler\n");
|
||||
fprintf(stderr, "usage: gun [-t] [file1.gz [file2.Z ...]]\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
452
examples/pigz.c
452
examples/pigz.c
@ -1,452 +0,0 @@
|
||||
/* pigz.c -- parallel implementation of gzip
|
||||
* Copyright (C) 2007 Mark Adler
|
||||
* Version 1.1 28 January 2007 Mark Adler
|
||||
*/
|
||||
|
||||
/* Version history:
|
||||
1.0 17 Jan 2007 First version
|
||||
1.1 28 Jan 2007 Avoid void * arithmetic (some compilers don't get that)
|
||||
Add note about requiring zlib 1.2.3
|
||||
Allow compression level 0 (no compression)
|
||||
Completely rewrite parallelism -- add a write thread
|
||||
Use deflateSetDictionary() to make use of history
|
||||
Tune argument defaults to best performance on four cores
|
||||
*/
|
||||
|
||||
/*
|
||||
pigz compresses from stdin to stdout using threads to make use of multiple
|
||||
processors and cores. The input is broken up into 128 KB chunks, and each
|
||||
is compressed separately. The CRC for each chunk is also calculated
|
||||
separately. The compressed chunks are written in order to the output,
|
||||
and the overall CRC is calculated from the CRC's of the chunks.
|
||||
|
||||
The compressed data format generated is the gzip format using the deflate
|
||||
compression method. First a gzip header is written, followed by raw deflate
|
||||
partial streams. They are partial, in that they do not have a terminating
|
||||
block. At the end, the deflate stream is terminated with a final empty
|
||||
static block, and lastly a gzip trailer is written with the CRC and the
|
||||
number of input bytes.
|
||||
|
||||
Each raw deflate partial stream is terminated by an empty stored block
|
||||
(using the Z_SYNC_FLUSH option of zlib), in order to end that partial
|
||||
bit stream at a byte boundary. That allows the partial streams to be
|
||||
concantenated simply as sequences of bytes. This adds a very small four
|
||||
or five byte overhead to the output for each input chunk.
|
||||
|
||||
zlib's crc32_combine() routine allows the calcuation of the CRC of the
|
||||
entire input using the independent CRC's of the chunks. pigz requires zlib
|
||||
version 1.2.3 or later, since that is the first version that provides the
|
||||
crc32_combine() function.
|
||||
|
||||
pigz uses the POSIX pthread library for thread control and communication.
|
||||
*/
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <pthread.h>
|
||||
#include <sys/types.h>
|
||||
#include <sys/uio.h>
|
||||
#include <unistd.h>
|
||||
#include "zlib.h"
|
||||
|
||||
#define local static
|
||||
|
||||
/* exit with error */
|
||||
local void bail(char *msg)
|
||||
{
|
||||
fprintf(stderr, "pigz abort: %s\n", msg);
|
||||
exit(1);
|
||||
}
|
||||
|
||||
/* read up to len bytes into buf, repeating read() calls as needed */
|
||||
local size_t readn(int desc, unsigned char *buf, size_t len)
|
||||
{
|
||||
ssize_t ret;
|
||||
size_t got;
|
||||
|
||||
got = 0;
|
||||
while (len) {
|
||||
ret = read(desc, buf, len);
|
||||
if (ret < 0)
|
||||
bail("read error");
|
||||
if (ret == 0)
|
||||
break;
|
||||
buf += ret;
|
||||
len -= ret;
|
||||
got += ret;
|
||||
}
|
||||
return got;
|
||||
}
|
||||
|
||||
/* write len bytes, repeating write() calls as needed */
|
||||
local void writen(int desc, unsigned char *buf, size_t len)
|
||||
{
|
||||
ssize_t ret;
|
||||
|
||||
while (len) {
|
||||
ret = write(desc, buf, len);
|
||||
if (ret < 1)
|
||||
bail("write error");
|
||||
buf += ret;
|
||||
len -= ret;
|
||||
}
|
||||
}
|
||||
|
||||
/* a flag variable for communication between two threads */
|
||||
struct flag {
|
||||
int value; /* value of flag */
|
||||
pthread_mutex_t lock; /* lock for checking and changing flag */
|
||||
pthread_cond_t cond; /* condition for signaling on flag change */
|
||||
};
|
||||
|
||||
/* initialize a flag for use, starting with value val */
|
||||
local void flag_init(struct flag *me, int val)
|
||||
{
|
||||
me->value = val;
|
||||
pthread_mutex_init(&(me->lock), NULL);
|
||||
pthread_cond_init(&(me->cond), NULL);
|
||||
}
|
||||
|
||||
/* set the flag to val, signal another process that may be waiting for it */
|
||||
local void flag_set(struct flag *me, int val)
|
||||
{
|
||||
pthread_mutex_lock(&(me->lock));
|
||||
me->value = val;
|
||||
pthread_cond_signal(&(me->cond));
|
||||
pthread_mutex_unlock(&(me->lock));
|
||||
}
|
||||
|
||||
/* if it isn't already, wait for some other thread to set the flag to val */
|
||||
local void flag_wait(struct flag *me, int val)
|
||||
{
|
||||
pthread_mutex_lock(&(me->lock));
|
||||
while (me->value != val)
|
||||
pthread_cond_wait(&(me->cond), &(me->lock));
|
||||
pthread_mutex_unlock(&(me->lock));
|
||||
}
|
||||
|
||||
/* if flag is equal to val, wait for some other thread to change it */
|
||||
local void flag_wait_not(struct flag *me, int val)
|
||||
{
|
||||
pthread_mutex_lock(&(me->lock));
|
||||
while (me->value == val)
|
||||
pthread_cond_wait(&(me->cond), &(me->lock));
|
||||
pthread_mutex_unlock(&(me->lock));
|
||||
}
|
||||
|
||||
/* clean up the flag when done with it */
|
||||
local void flag_done(struct flag *me)
|
||||
{
|
||||
pthread_cond_destroy(&(me->cond));
|
||||
pthread_mutex_destroy(&(me->lock));
|
||||
}
|
||||
|
||||
/* a unit of work to feed to compress_thread() -- it is assumed that the out
|
||||
buffer is large enough to hold the maximum size len bytes could deflate to,
|
||||
plus five bytes for the final sync marker */
|
||||
struct work {
|
||||
size_t len; /* length of input */
|
||||
unsigned long crc; /* crc of input */
|
||||
unsigned char *buf; /* input */
|
||||
unsigned char *out; /* space for output (guaranteed big enough) */
|
||||
z_stream strm; /* pre-initialized z_stream */
|
||||
struct flag busy; /* busy flag indicating work unit in use */
|
||||
pthread_t comp; /* this compression thread */
|
||||
};
|
||||
|
||||
/* busy flag values */
|
||||
#define IDLE 0 /* compress and writing done -- can start compress */
|
||||
#define COMP 1 /* compress -- input and output buffers in use */
|
||||
#define WRITE 2 /* compress done, writing output -- can read input */
|
||||
|
||||
/* read-only globals (set by main/read thread before others started) */
|
||||
local int ind; /* input file descriptor */
|
||||
local int outd; /* output file descriptor */
|
||||
local int level; /* compression level */
|
||||
local int procs; /* number of compression threads (>= 2) */
|
||||
local size_t size; /* uncompressed input size per thread (>= 32K) */
|
||||
local struct work *jobs; /* work units: jobs[0..procs-1] */
|
||||
|
||||
/* next and previous jobs[] indices */
|
||||
#define NEXT(n) ((n) == procs - 1 ? 0 : (n) + 1)
|
||||
#define PREV(n) ((n) == 0 ? procs - 1 : (n) - 1)
|
||||
|
||||
/* sliding dictionary size for deflate */
|
||||
#define DICT 32768U
|
||||
|
||||
/* largest power of 2 that fits in an unsigned int -- used to limit requests
|
||||
to zlib functions that use unsigned int lengths */
|
||||
#define MAX ((((unsigned)-1) >> 1) + 1)
|
||||
|
||||
/* compress thread: compress the input in the provided work unit and compute
|
||||
its crc -- assume that the amount of space at job->out is guaranteed to be
|
||||
enough for the compressed output, as determined by the maximum expansion
|
||||
of deflate compression -- use the input in the previous work unit (if there
|
||||
is one) to set the deflate dictionary for better compression */
|
||||
local void *compress_thread(void *arg)
|
||||
{
|
||||
size_t len; /* input length for this work unit */
|
||||
unsigned long crc; /* crc of input data */
|
||||
struct work *prev; /* previous work unit */
|
||||
struct work *job = arg; /* work unit for this thread */
|
||||
z_stream *strm = &(job->strm); /* zlib stream for this work unit */
|
||||
|
||||
/* reset state for a new compressed stream */
|
||||
(void)deflateReset(strm);
|
||||
|
||||
/* initialize input, output, and crc */
|
||||
strm->next_in = job->buf;
|
||||
strm->next_out = job->out;
|
||||
len = job->len;
|
||||
crc = crc32(0L, Z_NULL, 0);
|
||||
|
||||
/* set dictionary if this isn't the first work unit, and if we will be
|
||||
compressing something (the read thread assures that the dictionary
|
||||
data in the previous work unit is still there) */
|
||||
prev = jobs + PREV(job - jobs);
|
||||
if (prev->buf != NULL && len != 0)
|
||||
deflateSetDictionary(strm, prev->buf + (size - DICT), DICT);
|
||||
|
||||
/* run MAX-sized amounts of input through deflate and crc32 -- this loop
|
||||
is needed for those cases where the integer type is smaller than the
|
||||
size_t type, or when len is close to the limit of the size_t type */
|
||||
while (len > MAX) {
|
||||
strm->avail_in = MAX;
|
||||
strm->avail_out = (unsigned)-1;
|
||||
crc = crc32(crc, strm->next_in, strm->avail_in);
|
||||
(void)deflate(strm, Z_NO_FLUSH);
|
||||
len -= MAX;
|
||||
}
|
||||
|
||||
/* run last piece through deflate and crc32, follow with a sync marker */
|
||||
if (len) {
|
||||
strm->avail_in = len;
|
||||
strm->avail_out = (unsigned)-1;
|
||||
crc = crc32(crc, strm->next_in, strm->avail_in);
|
||||
(void)deflate(strm, Z_SYNC_FLUSH);
|
||||
}
|
||||
|
||||
/* don't need to Z_FINISH, since we'd delete the last two bytes anyway */
|
||||
|
||||
/* return result */
|
||||
job->crc = crc;
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/* put a 4-byte integer into a byte array in LSB order */
|
||||
#define PUT4(a,b) (*(a)=(b),(a)[1]=(b)>>8,(a)[2]=(b)>>16,(a)[3]=(b)>>24)
|
||||
|
||||
/* write thread: wait for compression threads to complete, write output in
|
||||
order, also write gzip header and trailer around the compressed data */
|
||||
local void *write_thread(void *arg)
|
||||
{
|
||||
int n; /* compress thread index */
|
||||
size_t len; /* length of input processed */
|
||||
unsigned long tot; /* total uncompressed size (overflow ok) */
|
||||
unsigned long crc; /* CRC-32 of uncompressed data */
|
||||
unsigned char wrap[10]; /* gzip header or trailer */
|
||||
|
||||
/* write simple gzip header */
|
||||
memcpy(wrap, "\037\213\10\0\0\0\0\0\0\3", 10);
|
||||
wrap[8] = level == 9 ? 2 : (level == 1 ? 4 : 0);
|
||||
writen(outd, wrap, 10);
|
||||
|
||||
/* process output of compress threads until end of input */
|
||||
tot = 0;
|
||||
crc = crc32(0L, Z_NULL, 0);
|
||||
n = 0;
|
||||
do {
|
||||
/* wait for compress thread to start, then wait to complete */
|
||||
flag_wait(&(jobs[n].busy), COMP);
|
||||
pthread_join(jobs[n].comp, NULL);
|
||||
|
||||
/* now that compress is done, allow read thread to use input buffer */
|
||||
flag_set(&(jobs[n].busy), WRITE);
|
||||
|
||||
/* write compressed data and update length and crc */
|
||||
writen(outd, jobs[n].out, jobs[n].strm.next_out - jobs[n].out);
|
||||
len = jobs[n].len;
|
||||
tot += len;
|
||||
crc = crc32_combine(crc, jobs[n].crc, len);
|
||||
|
||||
/* release this work unit and go to the next work unit */
|
||||
flag_set(&(jobs[n].busy), IDLE);
|
||||
n = NEXT(n);
|
||||
|
||||
/* an input buffer less than size in length indicates end of input */
|
||||
} while (len == size);
|
||||
|
||||
/* write final static block and gzip trailer (crc and len mod 2^32) */
|
||||
wrap[0] = 3; wrap[1] = 0;
|
||||
PUT4(wrap + 2, crc);
|
||||
PUT4(wrap + 6, tot);
|
||||
writen(outd, wrap, 10);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/* one-time initialization of a work unit -- this is where we set the deflate
|
||||
compression level and request raw deflate, and also where we set the size
|
||||
of the output buffer to guarantee enough space for a worst-case deflate
|
||||
ending with a Z_SYNC_FLUSH */
|
||||
local void job_init(struct work *job)
|
||||
{
|
||||
int ret; /* deflateInit2() return value */
|
||||
|
||||
job->buf = malloc(size);
|
||||
job->out = malloc(size + (size >> 11) + 10);
|
||||
job->strm.zfree = Z_NULL;
|
||||
job->strm.zalloc = Z_NULL;
|
||||
job->strm.opaque = Z_NULL;
|
||||
ret = deflateInit2(&(job->strm), level, Z_DEFLATED, -15, 8,
|
||||
Z_DEFAULT_STRATEGY);
|
||||
if (job->buf == NULL || job->out == NULL || ret != Z_OK)
|
||||
bail("not enough memory");
|
||||
}
|
||||
|
||||
/* compress ind to outd in the gzip format, using multiple threads for the
|
||||
compression and crc calculation and another thread for writing the output --
|
||||
the read thread is the main thread */
|
||||
local void read_thread(void)
|
||||
{
|
||||
int n; /* general index */
|
||||
size_t got; /* amount read */
|
||||
pthread_attr_t attr; /* thread attributes (left at defaults) */
|
||||
pthread_t write; /* write thread */
|
||||
|
||||
/* set defaults (not all pthread implementations default to joinable) */
|
||||
pthread_attr_init(&attr);
|
||||
pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
|
||||
|
||||
/* allocate and set up work list (individual work units will be initialized
|
||||
as needed, in case the input is short), assure that allocation size
|
||||
arithmetic does not overflow */
|
||||
if (size + (size >> 11) + 10 < (size >> 11) + 10 ||
|
||||
(ssize_t)(size + (size >> 11) + 10) < 0 ||
|
||||
((size_t)0 - 1) / procs <= sizeof(struct work) ||
|
||||
(jobs = malloc(procs * sizeof(struct work))) == NULL)
|
||||
bail("not enough memory");
|
||||
for (n = 0; n < procs; n++) {
|
||||
jobs[n].buf = NULL;
|
||||
flag_init(&(jobs[n].busy), IDLE);
|
||||
}
|
||||
|
||||
/* start write thread */
|
||||
pthread_create(&write, &attr, write_thread, NULL);
|
||||
|
||||
/* read from input and start compress threads (write thread will pick up
|
||||
the output of the compress threads) */
|
||||
n = 0;
|
||||
do {
|
||||
/* initialize this work unit if it's the first time it's used */
|
||||
if (jobs[n].buf == NULL)
|
||||
job_init(jobs + n);
|
||||
|
||||
/* read input data, but wait for last compress on this work unit to be
|
||||
done, and wait for the dictionary to be used by the last compress on
|
||||
the next work unit */
|
||||
flag_wait_not(&(jobs[n].busy), COMP);
|
||||
flag_wait_not(&(jobs[NEXT(n)].busy), COMP);
|
||||
got = readn(ind, jobs[n].buf, size);
|
||||
|
||||
/* start compress thread, but wait for write to be done first */
|
||||
flag_wait(&(jobs[n].busy), IDLE);
|
||||
jobs[n].len = got;
|
||||
pthread_create(&(jobs[n].comp), &attr, compress_thread, jobs + n);
|
||||
|
||||
/* mark work unit so write thread knows compress was started */
|
||||
flag_set(&(jobs[n].busy), COMP);
|
||||
|
||||
/* go to the next work unit */
|
||||
n = NEXT(n);
|
||||
|
||||
/* do until end of input, indicated by a read less than size */
|
||||
} while (got == size);
|
||||
|
||||
/* wait for the write thread to complete -- the write thread will join with
|
||||
all of the compress threads, so this waits for all of the threads to
|
||||
complete */
|
||||
pthread_join(write, NULL);
|
||||
|
||||
/* free up all requested resources and return */
|
||||
for (n = procs - 1; n >= 0; n--) {
|
||||
flag_done(&(jobs[n].busy));
|
||||
(void)deflateEnd(&(jobs[n].strm));
|
||||
free(jobs[n].out);
|
||||
free(jobs[n].buf);
|
||||
}
|
||||
free(jobs);
|
||||
pthread_attr_destroy(&attr);
|
||||
}
|
||||
|
||||
/* Process arguments for level, size, and procs, compress from stdin to
|
||||
stdout in the gzip format. Note that procs must be at least two in
|
||||
order to provide a dictionary in one work unit for the other work
|
||||
unit, and that size must be at least 32K to store a full dictionary. */
|
||||
int main(int argc, char **argv)
|
||||
{
|
||||
int n; /* general index */
|
||||
int get; /* command line parameters to get */
|
||||
char *arg; /* command line argument */
|
||||
|
||||
/* set defaults -- 32 processes and 128K buffers was found to provide
|
||||
good utilization of four cores (about 97%) and balanced the overall
|
||||
execution time impact of more threads against more dictionary
|
||||
processing for a fixed amount of memory -- the memory usage for these
|
||||
settings and full use of all work units (at least 4 MB of input) is
|
||||
16.2 MB
|
||||
*/
|
||||
level = Z_DEFAULT_COMPRESSION;
|
||||
procs = 32;
|
||||
size = 131072UL;
|
||||
|
||||
/* process command-line arguments */
|
||||
get = 0;
|
||||
for (n = 1; n < argc; n++) {
|
||||
arg = argv[n];
|
||||
if (*arg == '-') {
|
||||
while (*++arg)
|
||||
if (*arg >= '0' && *arg <= '9') /* compression level */
|
||||
level = *arg - '0';
|
||||
else if (*arg == 'b') /* chunk size in K */
|
||||
get |= 1;
|
||||
else if (*arg == 'p') /* number of processes */
|
||||
get |= 2;
|
||||
else if (*arg == 'h') { /* help */
|
||||
fputs("usage: pigz [-0..9] [-b blocksizeinK]", stderr);
|
||||
fputs(" [-p processes] < foo > foo.gz\n", stderr);
|
||||
return 0;
|
||||
}
|
||||
else
|
||||
bail("invalid option");
|
||||
}
|
||||
else if (get & 1) {
|
||||
if (get & 2)
|
||||
bail("you need to separate the -b and -p options");
|
||||
size = (size_t)(atol(arg)) << 10; /* chunk size */
|
||||
if (size < DICT)
|
||||
bail("invalid option");
|
||||
get = 0;
|
||||
}
|
||||
else if (get & 2) {
|
||||
procs = atoi(arg); /* processes */
|
||||
if (procs < 2)
|
||||
bail("invalid option");
|
||||
get = 0;
|
||||
}
|
||||
else
|
||||
bail("invalid option (you need to pipe input and output)");
|
||||
}
|
||||
if (get)
|
||||
bail("missing option argument");
|
||||
|
||||
/* do parallel compression from stdin to stdout (the read thread starts up
|
||||
the write thread and the compression threads, and they all join before
|
||||
the read thread returns) */
|
||||
ind = 0;
|
||||
outd = 1;
|
||||
read_thread();
|
||||
|
||||
/* done */
|
||||
return 0;
|
||||
}
|
||||
18
gzguts.h
18
gzguts.h
@ -15,10 +15,12 @@
|
||||
#define ZLIB_INTERNAL
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <fcntl.h>
|
||||
#include "zlib.h"
|
||||
#ifdef STDC
|
||||
# include <string.h>
|
||||
# include <stdlib.h>
|
||||
#endif
|
||||
#include <fcntl.h>
|
||||
|
||||
#ifdef NO_DEFLATE /* for compatibility with old definition */
|
||||
# define NO_GZCOMPRESS
|
||||
@ -42,7 +44,8 @@
|
||||
|
||||
/* get errno and strerror definition */
|
||||
#if defined UNDER_CE && defined NO_ERRNO_H
|
||||
# define zstrerror(errnum) strwinerror((DWORD)errnum)
|
||||
# include <windows.h>
|
||||
# define zstrerror() gz_strwinerror((DWORD)GetLastError())
|
||||
#else
|
||||
# ifdef STDC
|
||||
# include <errno.h>
|
||||
@ -54,7 +57,7 @@
|
||||
|
||||
/* MVS fdopen() */
|
||||
#ifdef __MVS__
|
||||
# pragma map (fdopen , "\174\174FDOPEN")
|
||||
#pragma map (fdopen , "\174\174FDOPEN")
|
||||
FILE *fdopen(int, const char *);
|
||||
#endif
|
||||
|
||||
@ -106,4 +109,7 @@ typedef struct {
|
||||
typedef gz_state FAR *gz_statep;
|
||||
|
||||
/* shared functions */
|
||||
ZEXTERN void ZEXPORT gz_error OF((gz_statep, int, char *));
|
||||
ZEXTERN void ZEXPORT gz_error OF((gz_statep, int, const char *));
|
||||
#if defined UNDER_CE && defined NO_ERRNO_H
|
||||
ZEXTERN char ZEXPORT *gz_strwinerror OF((DWORD error));
|
||||
#endif
|
||||
|
||||
2
gzio.c
2
gzio.c
@ -95,7 +95,7 @@ local char *strwinerror (error)
|
||||
#endif /* UNDER_CE && NO_ERRNO_H */
|
||||
|
||||
#ifdef __MVS__
|
||||
# pragma map (fdopen , "\174\174FDOPEN")
|
||||
#pragma map (fdopen , "\174\174FDOPEN")
|
||||
FILE *fdopen(int, const char *);
|
||||
#endif
|
||||
|
||||
|
||||
69
gzlib.c
69
gzlib.c
@ -18,21 +18,17 @@ local void gz_reset OF((gz_statep));
|
||||
local gzFile gz_open OF((const char *, int, const char *, int));
|
||||
|
||||
#if defined UNDER_CE && defined NO_ERRNO_H
|
||||
local char *strwinerror OF((DWORD error));
|
||||
|
||||
# include <windows.h>
|
||||
/* Map the Windows error number in ERROR to a locale-dependent error message
|
||||
string and return a pointer to it. Typically, the values for ERROR come
|
||||
from GetLastError.
|
||||
|
||||
/* Map the Windows error number in ERROR to a locale-dependent error
|
||||
message string and return a pointer to it. Typically, the values
|
||||
for ERROR come from GetLastError.
|
||||
The string pointed to shall not be modified by the application, but may be
|
||||
overwritten by a subsequent call to gz_strwinerror
|
||||
|
||||
The string pointed to shall not be modified by the application,
|
||||
but may be overwritten by a subsequent call to strwinerror
|
||||
|
||||
The strwinerror function does not change the current setting
|
||||
of GetLastError. */
|
||||
|
||||
local char *strwinerror (error)
|
||||
The gz_strwinerror function does not change the current setting of
|
||||
GetLastError. */
|
||||
char ZEXPORT *gz_strwinerror (error)
|
||||
DWORD error;
|
||||
{
|
||||
static char buf[1024];
|
||||
@ -82,18 +78,18 @@ local void gz_reset(state)
|
||||
state->have = 0; /* no output data available */
|
||||
state->eof = 0; /* not at end of file */
|
||||
}
|
||||
state->seek = 0; /* no seek request pending */
|
||||
gz_error(state, Z_OK, NULL); /* clear error */
|
||||
state->pos = 0; /* no uncompressed data yet */
|
||||
state->strm.avail_in = 0; /* no input data yet */
|
||||
state->seek = 0; /* no seek request pending */
|
||||
gz_error(state, Z_OK, NULL); /* clear error */
|
||||
state->pos = 0; /* no uncompressed data yet */
|
||||
state->strm.avail_in = 0; /* no input data yet */
|
||||
}
|
||||
|
||||
/* Open a gzip file either by name or file descriptor. */
|
||||
local gzFile gz_open(path, fd, mode, use64)
|
||||
local gzFile gz_open(path, fd, mode, large)
|
||||
const char *path;
|
||||
int fd;
|
||||
const char *mode;
|
||||
int use64;
|
||||
int large;
|
||||
{
|
||||
gz_statep state;
|
||||
|
||||
@ -156,9 +152,13 @@ local gzFile gz_open(path, fd, mode, use64)
|
||||
/* open the file with the appropriate mode (or just use fd) */
|
||||
state->fd = fd != -1 ? fd :
|
||||
open(path,
|
||||
(large ?
|
||||
#ifdef O_LARGEFILE
|
||||
(use64 ? O_LARGEFILE : 0) |
|
||||
O_LARGEFILE
|
||||
#else
|
||||
0
|
||||
#endif
|
||||
: 0) |
|
||||
#ifdef O_BINARY
|
||||
O_BINARY |
|
||||
#endif
|
||||
@ -214,13 +214,16 @@ gzFile ZEXPORT gzdopen(fd, mode)
|
||||
int fd;
|
||||
const char *mode;
|
||||
{
|
||||
char path[46]; /* allow up to 128-bit integers, so don't worry --
|
||||
the sprintf() is safe */
|
||||
char path[46]; /* identifier for error messages */
|
||||
|
||||
if (fd < 0)
|
||||
return NULL;
|
||||
sprintf(path, "<fd:%d>", fd); /* for error messages */
|
||||
return gz_open(path, fd, mode, 1);
|
||||
#ifdef NO_snprintf
|
||||
sprintf(path, "<fd:%d>", fd); /* big enough for 128-bit integers */
|
||||
#else
|
||||
snprintf(path, sizeof(path), "<fd:%d>", fd);
|
||||
#endif
|
||||
return gz_open(path, fd, mode, 0);
|
||||
}
|
||||
|
||||
/* -- see zlib.h -- */
|
||||
@ -325,7 +328,7 @@ z_off64_t ZEXPORT gzseek64(file, offset, whence)
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* if reading, skip what's in output buffer (one less gz_getc() check) */
|
||||
/* if reading, skip what's in output buffer (one less gzgetc() check) */
|
||||
if (state->mode == GZ_READ) {
|
||||
n = state->have > offset ? (unsigned)offset : state->have;
|
||||
state->have -= n;
|
||||
@ -422,10 +425,10 @@ int ZEXPORT gzeof(file)
|
||||
|
||||
/* get internal structure and check integrity */
|
||||
if (file == NULL)
|
||||
return -1;
|
||||
return 0;
|
||||
state = (gz_statep)file;
|
||||
if (state->mode != GZ_READ && state->mode != GZ_WRITE)
|
||||
return -1;
|
||||
return 0;
|
||||
|
||||
/* return end-of-file state */
|
||||
return state->mode == GZ_READ ? (state->eof && state->have == 0) : 0;
|
||||
@ -470,15 +473,15 @@ void ZEXPORT gzclearerr(file)
|
||||
}
|
||||
|
||||
/* Create an error message in allocated memory and set state->err and
|
||||
state->msg accordingly. Free any previous error message already there. Do
|
||||
state->msg accordingly. Free any previous error message already there. Do
|
||||
not try to free or allocate space if the error is Z_MEM_ERROR (out of
|
||||
memory). Simply save the error message as a static string. If there is
|
||||
an allocation failure constructing the error message, then convert the
|
||||
error to out of memory. */
|
||||
memory). Simply save the error message as a static string. If there is an
|
||||
allocation failure constructing the error message, then convert the error to
|
||||
out of memory. */
|
||||
void ZEXPORT gz_error(state, err, msg)
|
||||
gz_statep state;
|
||||
int err;
|
||||
char *msg;
|
||||
const char *msg;
|
||||
{
|
||||
/* free previously allocated message and clear */
|
||||
if (state->msg != NULL) {
|
||||
@ -494,14 +497,14 @@ void ZEXPORT gz_error(state, err, msg)
|
||||
|
||||
/* for an out of memory error, save as static string */
|
||||
if (err == Z_MEM_ERROR) {
|
||||
state->msg = msg;
|
||||
state->msg = (char *)msg;
|
||||
return;
|
||||
}
|
||||
|
||||
/* construct error message with path */
|
||||
if ((state->msg = malloc(strlen(state->path) + strlen(msg) + 3)) == NULL) {
|
||||
state->err = Z_MEM_ERROR;
|
||||
state->msg = "out of memory";
|
||||
state->msg = (char *)"out of memory";
|
||||
return;
|
||||
}
|
||||
strcpy(state->msg, state->path);
|
||||
|
||||
48
gzread.c
48
gzread.c
@ -69,8 +69,8 @@ local int gz_avail(state)
|
||||
(strm->avail_in == 0 ? -1 : \
|
||||
(strm->avail_in--, *(strm->next_in)++)))
|
||||
|
||||
/* Get a four-byte little-endian integer and return 0 on success and the
|
||||
value in *ret. Otherwise -1 is returned and *ret is not modified. */
|
||||
/* Get a four-byte little-endian integer and return 0 on success and the value
|
||||
in *ret. Otherwise -1 is returned and *ret is not modified. */
|
||||
local int gz_next4(state, ret)
|
||||
gz_statep state;
|
||||
unsigned long *ret;
|
||||
@ -93,7 +93,7 @@ local int gz_next4(state, ret)
|
||||
/* Look for gzip header, set up for inflate or copy. state->have must be zero.
|
||||
If this is the first time in, allocate required memory. state->how will be
|
||||
left unchanged if there is no more input data available, will be set to 1 if
|
||||
there is no gzip header and direct copying will be performned, or it will be
|
||||
there is no gzip header and direct copying will be performed, or it will be
|
||||
set to 2 for decompression, and the gzip header will be skipped so that the
|
||||
next available input data is the raw deflate stream. If direct copying,
|
||||
then leftover input data from the input buffer will be copied to the output
|
||||
@ -190,6 +190,8 @@ local int gz_head(state)
|
||||
NEXT();
|
||||
NEXT();
|
||||
}
|
||||
/* an unexpected end of file is not checked for here -- it will be
|
||||
noticed on the first request for uncompressed data */
|
||||
|
||||
/* set up for decompression */
|
||||
inflateReset(strm);
|
||||
@ -206,7 +208,7 @@ local int gz_head(state)
|
||||
|
||||
/* doing raw i/o, save start of raw data for seeking, copy any leftover
|
||||
input to output -- this assumes that the output buffer is larger than
|
||||
the input buffer */
|
||||
the input buffer, which also assures space for gzungetc() */
|
||||
state->raw = state->pos;
|
||||
state->next = state->out;
|
||||
if (strm->avail_in) {
|
||||
@ -220,10 +222,10 @@ local int gz_head(state)
|
||||
|
||||
/* Decompress from input to the provided next_out and avail_out in the state.
|
||||
If the end of the compressed data is reached, then verify the gzip trailer
|
||||
check value and length (modulo 2^32). state->have and state->next are
|
||||
set to point to the just decompressed data, and the crc is updated. If the
|
||||
check value and length (modulo 2^32). state->have and state->next are set
|
||||
to point to the just decompressed data, and the crc is updated. If the
|
||||
trailer is verified, state->how is reset to zero to look for the next gzip
|
||||
stream or raw data, once state->have is depleted. Returns 0 on success, -1
|
||||
stream or raw data, once state->have is depleted. Returns 0 on success, -1
|
||||
on failure. Failures may include invalid compressed data or a failed gzip
|
||||
trailer verification. */
|
||||
local int gz_decomp(state)
|
||||
@ -372,6 +374,17 @@ int ZEXPORT gzread(file, buf, len)
|
||||
if (state->mode != GZ_READ || state->err != Z_OK)
|
||||
return -1;
|
||||
|
||||
/* since an int is returned, make sure len fits in one, otherwise return
|
||||
with an error (this avoids the flaw in the interface) */
|
||||
if ((int)len < 0) {
|
||||
gz_error(state, Z_BUF_ERROR, "requested length does not fit in int");
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* if len is zero, avoid unnecessary operations */
|
||||
if (len == 0)
|
||||
return 0;
|
||||
|
||||
/* process a skip request */
|
||||
if (state->seek) {
|
||||
state->seek = 0;
|
||||
@ -381,8 +394,7 @@ int ZEXPORT gzread(file, buf, len)
|
||||
|
||||
/* get len bytes to buf, or less than len if at the end */
|
||||
got = 0;
|
||||
while (len) {
|
||||
|
||||
do {
|
||||
/* first just try copying data from the output buffer */
|
||||
if (state->have) {
|
||||
n = state->have > len ? len : state->have;
|
||||
@ -402,6 +414,8 @@ int ZEXPORT gzread(file, buf, len)
|
||||
if (gz_make(state) == -1)
|
||||
return -1;
|
||||
continue; /* no progress yet -- go back to memcpy() above */
|
||||
/* the copy above assures that we will leave with space in the
|
||||
output buffer, allowing at least one gzungetc() to succeed */
|
||||
}
|
||||
|
||||
/* large len -- read directly into user buffer */
|
||||
@ -422,13 +436,13 @@ int ZEXPORT gzread(file, buf, len)
|
||||
|
||||
/* update progress */
|
||||
len -= n;
|
||||
buf += n;
|
||||
buf = (char *)buf + n;
|
||||
got += n;
|
||||
state->pos += n;
|
||||
}
|
||||
} while (len);
|
||||
|
||||
/* return number of bytes read into user buffer */
|
||||
return (int)got; /* len had better fit in int -- interface flaw */
|
||||
/* return number of bytes read into user buffer (will fit in int) */
|
||||
return (int)got;
|
||||
}
|
||||
|
||||
/* -- see zlib.h -- */
|
||||
@ -448,7 +462,7 @@ int ZEXPORT gzgetc(file)
|
||||
if (state->mode != GZ_READ || state->err != Z_OK)
|
||||
return -1;
|
||||
|
||||
/* try output buffer */
|
||||
/* try output buffer (no need to check for skip request) */
|
||||
if (state->have) {
|
||||
state->have--;
|
||||
state->pos++;
|
||||
@ -496,9 +510,11 @@ int ZEXPORT gzungetc(c, file)
|
||||
return c;
|
||||
}
|
||||
|
||||
/* if no room, give up (must have already done a gz_ungetc()) */
|
||||
if (state->have == (state->size << 1))
|
||||
/* if no room, give up (must have already done a gzungetc()) */
|
||||
if (state->have == (state->size << 1)) {
|
||||
gz_error(state, Z_BUF_ERROR, "out of room to push characters");
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* slide output data if needed and insert byte before existing data */
|
||||
if (state->next == state->out) {
|
||||
|
||||
36
gzwrite.c
36
gzwrite.c
@ -20,15 +20,6 @@ local int gz_init(state)
|
||||
int ret;
|
||||
z_streamp strm = &(state->strm);
|
||||
|
||||
/* check version of zlib -- need 1.2.1 or later for gzip deflate() */
|
||||
#ifdef ZLIB_VERNUM
|
||||
if (ZLIB_VERNUM < 0x1210)
|
||||
#endif
|
||||
{
|
||||
gz_error(state, Z_VERSION_ERROR, "need zlib 1.2.1 or later");
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* allocate input and output buffers */
|
||||
state->in = malloc(state->want);
|
||||
state->out = malloc(state->want);
|
||||
@ -169,6 +160,17 @@ int ZEXPORT gzwrite(file, buf, len)
|
||||
if (state->mode != GZ_WRITE || state->err != Z_OK)
|
||||
return -1;
|
||||
|
||||
/* since an int is returned, make sure len fits in one, otherwise return
|
||||
with an error (this avoids the flaw in the interface) */
|
||||
if ((int)len < 0) {
|
||||
gz_error(state, Z_BUF_ERROR, "requested length does not fit in int");
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* if len is zero, avoid unnecessary operations */
|
||||
if (len == 0)
|
||||
return 0;
|
||||
|
||||
/* allocate memory if this is the first time through */
|
||||
if (state->size == 0 && gz_init(state) == -1)
|
||||
return -1;
|
||||
@ -183,7 +185,7 @@ int ZEXPORT gzwrite(file, buf, len)
|
||||
/* for small len, copy to input buffer, otherwise compress directly */
|
||||
if (len < state->size) {
|
||||
/* copy to input buffer, compress when full */
|
||||
while (len) {
|
||||
do {
|
||||
if (strm->avail_in == 0)
|
||||
strm->next_in = state->in;
|
||||
n = state->size - strm->avail_in;
|
||||
@ -192,11 +194,11 @@ int ZEXPORT gzwrite(file, buf, len)
|
||||
memcpy(strm->next_in + strm->avail_in, buf, n);
|
||||
strm->avail_in += n;
|
||||
state->pos += n;
|
||||
buf += n;
|
||||
buf = (char *)buf + n;
|
||||
len -= n;
|
||||
if (len && gz_comp(state, Z_NO_FLUSH) == -1)
|
||||
return -1;
|
||||
}
|
||||
} while (len);
|
||||
}
|
||||
else {
|
||||
/* consume whatever's left in the input buffer */
|
||||
@ -211,7 +213,7 @@ int ZEXPORT gzwrite(file, buf, len)
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* input was all buffered or compressed */
|
||||
/* input was all buffered or compressed (put will fit in int) */
|
||||
return (int)put;
|
||||
}
|
||||
|
||||
@ -332,12 +334,10 @@ int ZEXPORTVA gzprintf (gzFile file, const char *format, ...)
|
||||
if (len <= 0 || len >= (int)size || state->in[size - 1] != 0)
|
||||
return 0;
|
||||
|
||||
/* write out result of printf() */
|
||||
/* update buffer and position, defer compression until needed */
|
||||
strm->avail_in = (unsigned)len;
|
||||
strm->next_in = state->in;
|
||||
state->pos += len;
|
||||
if (gz_comp(state, Z_NO_FLUSH) == -1)
|
||||
return 0;
|
||||
return len;
|
||||
}
|
||||
|
||||
@ -408,12 +408,10 @@ int ZEXPORTVA gzprintf (file, format, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10,
|
||||
if (len <= 0 || len >= (int)size || state->in[size - 1] != 0)
|
||||
return 0;
|
||||
|
||||
/* write out result of printf() */
|
||||
/* update buffer and position, defer compression until needed */
|
||||
strm->avail_in = (unsigned)len;
|
||||
strm->next_in = state->in;
|
||||
state->pos += len;
|
||||
if (gz_comp(state, Z_NO_FLUSH) == -1)
|
||||
return 0;
|
||||
return len;
|
||||
}
|
||||
|
||||
|
||||
@ -154,7 +154,7 @@ int windowBits;
|
||||
/* set number of window bits, free window if different */
|
||||
if (windowBits && (windowBits < 8 || windowBits > 15))
|
||||
return Z_STREAM_ERROR;
|
||||
if (state->wbits != windowBits && state->window != Z_NULL) {
|
||||
if (state->wbits != (unsigned)windowBits && state->window != Z_NULL) {
|
||||
ZFREE(strm, state->window);
|
||||
state->window = Z_NULL;
|
||||
}
|
||||
@ -1458,8 +1458,8 @@ int subvert;
|
||||
|
||||
if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
|
||||
state = (struct inflate_state FAR *)strm->state;
|
||||
#ifdef INFLATE_ALLOW_INVALID_DISTANCE_TOOFAR_ARRR
|
||||
state->sane = !subvert;
|
||||
#ifdef INFLATE_ALLOW_INVALID_DISTANCE_TOOFAR_ARRR
|
||||
return Z_OK;
|
||||
#else
|
||||
state->sane = 1;
|
||||
|
||||
@ -9,7 +9,7 @@
|
||||
#define MAXBITS 15
|
||||
|
||||
const char inflate_copyright[] =
|
||||
" inflate 1.2.3.5 Copyright 1995-2010 Mark Adler ";
|
||||
" inflate 1.2.3.6 Copyright 1995-2010 Mark Adler ";
|
||||
/*
|
||||
If you use the zlib library in a product, an acknowledgment is welcome
|
||||
in the documentation of your product. If for some reason you cannot
|
||||
@ -62,7 +62,7 @@ unsigned short FAR *work;
|
||||
35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0};
|
||||
static const unsigned short lext[31] = { /* Length codes 257..285 extra */
|
||||
16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18,
|
||||
19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 69, 199};
|
||||
19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 199, 70};
|
||||
static const unsigned short dbase[32] = { /* Distance codes 0..29 base */
|
||||
1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193,
|
||||
257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145,
|
||||
|
||||
385
make_vms.com
385
make_vms.com
@ -11,15 +11,18 @@ $!------------------------------------------------------------------------------
|
||||
$! Version history
|
||||
$! 0.01 20060120 First version to receive a number
|
||||
$! 0.02 20061008 Adapt to new Makefile.in
|
||||
$! 0.03 20091224 Add support for large file check
|
||||
$! 0.04 20100110 Add new gzclose, gzlib, gzread, gzwrite
|
||||
$!
|
||||
$ on error then goto err_exit
|
||||
$!
|
||||
$!
|
||||
$! Just some general constants...
|
||||
$!
|
||||
$ true = 1
|
||||
$ false = 0
|
||||
$ tmpnam = "temp_" + f$getjpi("","pid")
|
||||
$ tt = tmpnam + ".txt"
|
||||
$ tc = tmpnam + ".c"
|
||||
$ th = tmpnam + ".h"
|
||||
$ define/nolog tconfig 'th'
|
||||
$ its_decc = false
|
||||
$ its_vaxc = false
|
||||
$ its_gnuc = false
|
||||
@ -27,17 +30,25 @@ $ s_case = False
|
||||
$!
|
||||
$! Setup variables holding "config" information
|
||||
$!
|
||||
$ Make = ""
|
||||
$ Make = ""
|
||||
$ name = "Zlib"
|
||||
$ version = "?.?.?"
|
||||
$ v_string = "ZLIB_VERSION"
|
||||
$ v_file = "zlib.h"
|
||||
$ ccopt = ""
|
||||
$ lopts = ""
|
||||
$ ccopt = ""
|
||||
$ lopts = ""
|
||||
$ dnsrl = ""
|
||||
$ aconf_in_file = "config.hin"
|
||||
$ conf_check_string = ""
|
||||
$ linkonly = false
|
||||
$ optfile = name + ".opt"
|
||||
$ axp = f$getsyi("HW_MODEL").ge.1024
|
||||
$ libdefs = ""
|
||||
$ axp = f$getsyi("HW_MODEL").ge.1024 .and. f$getsyi("HW_MODEL").lt.4096
|
||||
$!
|
||||
$ whoami = f$parse(f$enviornment("Procedure"),,,,"NO_CONCEAL")
|
||||
$ mydef = F$parse(whoami,,,"DEVICE")
|
||||
$ mydir = f$parse(whoami,,,"DIRECTORY") - "]["
|
||||
$ myproc = f$parse(whoami,,,"Name") + f$parse(whoami,,,"type")
|
||||
$!
|
||||
$! Check for MMK/MMS
|
||||
$!
|
||||
@ -47,11 +58,16 @@ $!
|
||||
$!
|
||||
$ gosub find_version
|
||||
$!
|
||||
$ open/write topt tmp.opt
|
||||
$ open/write optf 'optfile'
|
||||
$!
|
||||
$ gosub check_opts
|
||||
$!
|
||||
$! Look for the compiler used
|
||||
$!
|
||||
$ gosub check_compiler
|
||||
$ close topt
|
||||
$!
|
||||
$ if its_decc
|
||||
$ then
|
||||
$ ccopt = "/prefix=all" + ccopt
|
||||
@ -71,6 +87,49 @@ $ then
|
||||
$ if f$trnlnm("SYS").eqs."" then define sys sys$library:
|
||||
$ endif
|
||||
$!
|
||||
$! Build a fake configure input header
|
||||
$!
|
||||
$ open/write conf_hin config.hin
|
||||
$ write conf_hin "#undef _LARGEFILE64_SOURCE"
|
||||
$ close conf_hin
|
||||
$!
|
||||
$!
|
||||
$ i = 0
|
||||
$FIND_ACONF:
|
||||
$ fname = f$element(i,"#",aconf_in_file)
|
||||
$ if fname .eqs. "#" then goto AMISS_ERR
|
||||
$ if f$search(fname) .eqs. ""
|
||||
$ then
|
||||
$ i = i + 1
|
||||
$ goto find_aconf
|
||||
$ endif
|
||||
$ open/read/err=aconf_err aconf_in 'fname'
|
||||
$ open/write aconf zlibdefs.h
|
||||
$ACONF_LOOP:
|
||||
$ read/end_of_file=aconf_exit aconf_in line
|
||||
$ work = f$edit(line, "compress,trim")
|
||||
$ if f$extract(0,6,work) .nes. "#undef"
|
||||
$ then
|
||||
$ write aconf line
|
||||
$ else
|
||||
$ cdef = f$element(1," ",work)
|
||||
$ gosub check_config
|
||||
$ endif
|
||||
$ goto aconf_loop
|
||||
$ACONF_EXIT:
|
||||
$ write aconf "#define VMS 1"
|
||||
$ write aconf "#include <unistd.h>"
|
||||
$ write aconf "#include <unixio.h>"
|
||||
$ write aconf "#ifdef _LARGEFILE"
|
||||
$ write aconf "#define off64_t __off64_t"
|
||||
$ write aconf "#define fopen64 fopen"
|
||||
$ write aconf "#define fseeko64 fseeko"
|
||||
$ write aconf "#define lseek64 lseek"
|
||||
$ write aconf "#define ftello64 ftell"
|
||||
$ write aconf "#endif"
|
||||
$ close aconf_in
|
||||
$ close aconf
|
||||
$ delete 'th';*
|
||||
$! Build the thing plain or with mms
|
||||
$!
|
||||
$ write sys$output "Compiling Zlib sources ..."
|
||||
@ -86,15 +145,15 @@ $ CALL MAKE crc32.OBJ "CC ''CCOPT' crc32" -
|
||||
$ CALL MAKE deflate.OBJ "CC ''CCOPT' deflate" -
|
||||
deflate.c deflate.h zutil.h zlib.h zconf.h zlibdefs.h
|
||||
$ CALL MAKE gzclose.OBJ "CC ''CCOPT' gzclose" -
|
||||
gzclose.c zlib.h zconf.h zlibdefs.h gzguts.h
|
||||
gzclose.c zutil.h zlib.h zconf.h zlibdefs.h
|
||||
$ CALL MAKE gzio.OBJ "CC ''CCOPT' gzio" -
|
||||
gzio.c zutil.h zlib.h zconf.h zlibdefs.h
|
||||
$ CALL MAKE gzlib.OBJ "CC ''CCOPT' gzlib" -
|
||||
gzlib.c zlib.h zconf.h zlibdefs.h gzguts.h
|
||||
gzlib.c zutil.h zlib.h zconf.h zlibdefs.h
|
||||
$ CALL MAKE gzread.OBJ "CC ''CCOPT' gzread" -
|
||||
gzread.c zlib.h zconf.h zlibdefs.h gzguts.h
|
||||
gzread.c zutil.h zlib.h zconf.h zlibdefs.h
|
||||
$ CALL MAKE gzwrite.OBJ "CC ''CCOPT' gzwrite" -
|
||||
gzwrite.c zlib.h zconf.h zlibdefs.h gzguts.h
|
||||
gzwrite.c zutil.h zlib.h zconf.h zlibdefs.h
|
||||
$ CALL MAKE infback.OBJ "CC ''CCOPT' infback" -
|
||||
infback.c zutil.h inftrees.h inflate.h inffast.h inffixed.h
|
||||
$ CALL MAKE inffast.OBJ "CC ''CCOPT' inffast" -
|
||||
@ -153,6 +212,14 @@ $ goto err_exit
|
||||
$ERR_EXIT:
|
||||
$ set message/facil/ident/sever/text
|
||||
$ close/nolog optf
|
||||
$ close/nolog topt
|
||||
$ close/nolog conf_hin
|
||||
$ close/nolog aconf_in
|
||||
$ close/nolog aconf
|
||||
$ close/nolog out
|
||||
$ close/nolog min
|
||||
$ close/nolog mod
|
||||
$ close/nolog h_in
|
||||
$ write sys$output "Exiting..."
|
||||
$ exit 2
|
||||
$!
|
||||
@ -200,61 +267,72 @@ $!------------------------------------------------------------------------------
|
||||
$!
|
||||
$! Check command line options and set symbols accordingly
|
||||
$!
|
||||
$!------------------------------------------------------------------------------
|
||||
$! Version history
|
||||
$! 0.01 20041206 First version to receive a number
|
||||
$! 0.02 20060126 Add new "HELP" target
|
||||
$ CHECK_OPTS:
|
||||
$ i = 1
|
||||
$ OPT_LOOP:
|
||||
$ if i .lt. 9
|
||||
$ then
|
||||
$ cparm = f$edit(p'i',"upcase")
|
||||
$ if cparm .eqs. "DEBUG"
|
||||
$!
|
||||
$! Check if parameter actually contains something
|
||||
$!
|
||||
$ if f$edit(cparm,"trim") .nes. ""
|
||||
$ then
|
||||
$ ccopt = ccopt + "/noopt/deb"
|
||||
$ lopts = lopts + "/deb"
|
||||
$ endif
|
||||
$ if f$locate("CCOPT=",cparm) .lt. f$length(cparm)
|
||||
$ then
|
||||
$ start = f$locate("=",cparm) + 1
|
||||
$ len = f$length(cparm) - start
|
||||
$ ccopt = ccopt + f$extract(start,len,cparm)
|
||||
$ if f$locate("AS_IS",f$edit(ccopt,"UPCASE")) .lt. f$length(ccopt) -
|
||||
then s_case = true
|
||||
$ endif
|
||||
$ if cparm .eqs. "LINK" then linkonly = true
|
||||
$ if f$locate("LOPTS=",cparm) .lt. f$length(cparm)
|
||||
$ then
|
||||
$ start = f$locate("=",cparm) + 1
|
||||
$ len = f$length(cparm) - start
|
||||
$ lopts = lopts + f$extract(start,len,cparm)
|
||||
$ endif
|
||||
$ if f$locate("CC=",cparm) .lt. f$length(cparm)
|
||||
$ then
|
||||
$ start = f$locate("=",cparm) + 1
|
||||
$ len = f$length(cparm) - start
|
||||
$ cc_com = f$extract(start,len,cparm)
|
||||
if (cc_com .nes. "DECC") .and. -
|
||||
(cc_com .nes. "VAXC") .and. -
|
||||
(cc_com .nes. "GNUC")
|
||||
$ if cparm .eqs. "DEBUG"
|
||||
$ then
|
||||
$ write sys$output "Unsupported compiler choice ''cc_com' ignored"
|
||||
$ write sys$output "Use DECC, VAXC, or GNUC instead"
|
||||
$ else
|
||||
$ if cc_com .eqs. "DECC" then its_decc = true
|
||||
$ if cc_com .eqs. "VAXC" then its_vaxc = true
|
||||
$ if cc_com .eqs. "GNUC" then its_gnuc = true
|
||||
$ ccopt = ccopt + "/noopt/deb"
|
||||
$ lopts = lopts + "/deb"
|
||||
$ endif
|
||||
$ endif
|
||||
$ if f$locate("MAKE=",cparm) .lt. f$length(cparm)
|
||||
$ then
|
||||
$ start = f$locate("=",cparm) + 1
|
||||
$ len = f$length(cparm) - start
|
||||
$ mmks = f$extract(start,len,cparm)
|
||||
$ if (mmks .eqs. "MMK") .or. (mmks .eqs. "MMS")
|
||||
$ if f$locate("CCOPT=",cparm) .lt. f$length(cparm)
|
||||
$ then
|
||||
$ make = mmks
|
||||
$ else
|
||||
$ write sys$output "Unsupported make choice ''mmks' ignored"
|
||||
$ write sys$output "Use MMK or MMS instead"
|
||||
$ start = f$locate("=",cparm) + 1
|
||||
$ len = f$length(cparm) - start
|
||||
$ ccopt = ccopt + f$extract(start,len,cparm)
|
||||
$ if f$locate("AS_IS",f$edit(ccopt,"UPCASE")) .lt. f$length(ccopt) -
|
||||
then s_case = true
|
||||
$ endif
|
||||
$ if cparm .eqs. "LINK" then linkonly = true
|
||||
$ if f$locate("LOPTS=",cparm) .lt. f$length(cparm)
|
||||
$ then
|
||||
$ start = f$locate("=",cparm) + 1
|
||||
$ len = f$length(cparm) - start
|
||||
$ lopts = lopts + f$extract(start,len,cparm)
|
||||
$ endif
|
||||
$ if f$locate("CC=",cparm) .lt. f$length(cparm)
|
||||
$ then
|
||||
$ start = f$locate("=",cparm) + 1
|
||||
$ len = f$length(cparm) - start
|
||||
$ cc_com = f$extract(start,len,cparm)
|
||||
if (cc_com .nes. "DECC") .and. -
|
||||
(cc_com .nes. "VAXC") .and. -
|
||||
(cc_com .nes. "GNUC")
|
||||
$ then
|
||||
$ write sys$output "Unsupported compiler choice ''cc_com' ignored"
|
||||
$ write sys$output "Use DECC, VAXC, or GNUC instead"
|
||||
$ else
|
||||
$ if cc_com .eqs. "DECC" then its_decc = true
|
||||
$ if cc_com .eqs. "VAXC" then its_vaxc = true
|
||||
$ if cc_com .eqs. "GNUC" then its_gnuc = true
|
||||
$ endif
|
||||
$ endif
|
||||
$ if f$locate("MAKE=",cparm) .lt. f$length(cparm)
|
||||
$ then
|
||||
$ start = f$locate("=",cparm) + 1
|
||||
$ len = f$length(cparm) - start
|
||||
$ mmks = f$extract(start,len,cparm)
|
||||
$ if (mmks .eqs. "MMK") .or. (mmks .eqs. "MMS")
|
||||
$ then
|
||||
$ make = mmks
|
||||
$ else
|
||||
$ write sys$output "Unsupported make choice ''mmks' ignored"
|
||||
$ write sys$output "Use MMK or MMS instead"
|
||||
$ endif
|
||||
$ endif
|
||||
$ if cparm .eqs. "HELP" then gosub bhelp
|
||||
$ endif
|
||||
$ i = i + 1
|
||||
$ goto opt_loop
|
||||
@ -267,6 +345,8 @@ $!
|
||||
$! Version history
|
||||
$! 0.01 20040223 First version to receive a number
|
||||
$! 0.02 20040229 Save/set value of decc$no_rooted_search_lists
|
||||
$! 0.03 20060202 Extend handling of GNU C
|
||||
$! 0.04 20090402 Compaq -> hp
|
||||
$CHECK_COMPILER:
|
||||
$ if (.not. (its_decc .or. its_vaxc .or. its_gnuc))
|
||||
$ then
|
||||
@ -282,15 +362,21 @@ $ then goto CC_ERR
|
||||
$ else
|
||||
$ if its_decc
|
||||
$ then
|
||||
$ write sys$output "CC compiler check ... Compaq C"
|
||||
$ write sys$output "CC compiler check ... hp C"
|
||||
$ if f$trnlnm("decc$no_rooted_search_lists") .nes. ""
|
||||
$ then
|
||||
$ dnrsl = f$trnlnm("decc$no_rooted_search_lists")
|
||||
$ endif
|
||||
$ define decc$no_rooted_search_lists 1
|
||||
$ define/nolog decc$no_rooted_search_lists 1
|
||||
$ else
|
||||
$ if its_vaxc then write sys$output "CC compiler check ... VAX C"
|
||||
$ if its_gnuc then write sys$output "CC compiler check ... GNU C"
|
||||
$ if its_gnuc
|
||||
$ then
|
||||
$ write sys$output "CC compiler check ... GNU C"
|
||||
$ if f$trnlnm(topt) then write topt "gnu_cc:[000000]gcclib.olb/lib"
|
||||
$ if f$trnlnm(optf) then write optf "gnu_cc:[000000]gcclib.olb/lib"
|
||||
$ cc = "gcc"
|
||||
$ endif
|
||||
$ if f$trnlnm(topt) then write topt "sys$share:vaxcrtl.exe/share"
|
||||
$ if f$trnlnm(optf) then write optf "sys$share:vaxcrtl.exe/share"
|
||||
$ endif
|
||||
@ -310,7 +396,8 @@ $ deck
|
||||
# written by Martin P.J. Zinser
|
||||
# <zinser@zinser.no-ip.info or zinser@sysdev.deutsche-boerse.com>
|
||||
|
||||
OBJS = adler32.obj, compress.obj, crc32.obj, gzio.obj, uncompr.obj, infback.obj\
|
||||
OBJS = adler32.obj, compress.obj, crc32.obj, gzclose.obj, gzio.obj, gzlib.obj\
|
||||
gzread.obj, gzwrite.obj, uncompr.obj, infback.obj\
|
||||
deflate.obj, trees.obj, zutil.obj, inflate.obj, \
|
||||
inftrees.obj, inffast.obj
|
||||
|
||||
@ -342,7 +429,11 @@ compress.obj : compress.c zlib.h zconf.h zlibdefs.h
|
||||
crc32.obj : crc32.c zutil.h zlib.h zconf.h zlibdefs.h
|
||||
deflate.obj : deflate.c deflate.h zutil.h zlib.h zconf.h zlibdefs.h
|
||||
example.obj : example.c zlib.h zconf.h zlibdefs.h
|
||||
gzclose.obj : gzclose.c zutil.h zlib.h zconf.h zlibdefs.h
|
||||
gzio.obj : gzio.c zutil.h zlib.h zconf.h zlibdefs.h
|
||||
gzlib.obj : gzlib.c zutil.h zlib.h zconf.h zlibdefs.h
|
||||
gzread.obj : gzread.c zutil.h zlib.h zconf.h zlibdefs.h
|
||||
gzwrite.obj : gzwrite.c zutil.h zlib.h zconf.h zlibdefs.h
|
||||
inffast.obj : inffast.c zutil.h zlib.h zconf.h zlibdefs.h inftrees.h inffast.h
|
||||
inflate.obj : inflate.c zutil.h zlib.h zconf.h zlibdefs.h
|
||||
inftrees.obj : inftrees.c zutil.h zlib.h zconf.h zlibdefs.h inftrees.h
|
||||
@ -416,6 +507,169 @@ $ close h_in
|
||||
$ return
|
||||
$!------------------------------------------------------------------------------
|
||||
$!
|
||||
$CHECK_CONFIG:
|
||||
$!
|
||||
$ in_ldef = f$locate(cdef,libdefs)
|
||||
$ if (in_ldef .lt. f$length(libdefs))
|
||||
$ then
|
||||
$ write aconf "#define ''cdef' 1"
|
||||
$ libdefs = f$extract(0,in_ldef,libdefs) + -
|
||||
f$extract(in_ldef + f$length(cdef) + 1, -
|
||||
f$length(libdefs) - in_ldef - f$length(cdef) - 1, -
|
||||
libdefs)
|
||||
$ else
|
||||
$ if (f$type('cdef') .eqs. "INTEGER")
|
||||
$ then
|
||||
$ write aconf "#define ''cdef' ", 'cdef'
|
||||
$ else
|
||||
$ if (f$type('cdef') .eqs. "STRING")
|
||||
$ then
|
||||
$ write aconf "#define ''cdef' ", """", '''cdef'', """"
|
||||
$ else
|
||||
$ gosub check_cc_def
|
||||
$ endif
|
||||
$ endif
|
||||
$ endif
|
||||
$ return
|
||||
$!------------------------------------------------------------------------------
|
||||
$!
|
||||
$! Check if this is a define relating to the properties of the C/C++
|
||||
$! compiler
|
||||
$!
|
||||
$ CHECK_CC_DEF:
|
||||
$ if (cdef .eqs. "_LARGEFILE64_SOURCE")
|
||||
$ then
|
||||
$ copy sys$input: 'tc'
|
||||
$ deck
|
||||
#include "tconfig"
|
||||
#define _LARGEFILE
|
||||
#include <stdio.h>
|
||||
|
||||
int main(){
|
||||
FILE *fp;
|
||||
fp = fopen("temp.txt","r");
|
||||
fseeko(fp,1,SEEK_SET);
|
||||
fclose(fp);
|
||||
}
|
||||
|
||||
$ eod
|
||||
$ test_inv = false
|
||||
$ comm_h = false
|
||||
$ gosub cc_prop_check
|
||||
$ return
|
||||
$ endif
|
||||
$ write aconf "/* ", line, " */"
|
||||
$ return
|
||||
$!------------------------------------------------------------------------------
|
||||
$!
|
||||
$! Check for properties of C/C++ compiler
|
||||
$!
|
||||
$! Version history
|
||||
$! 0.01 20031020 First version to receive a number
|
||||
$! 0.02 20031022 Added logic for defines with value
|
||||
$! 0.03 20040309 Make sure local config file gets not deleted
|
||||
$! 0.04 20041230 Also write include for configure run
|
||||
$! 0.05 20050103 Add processing of "comment defines"
|
||||
$CC_PROP_CHECK:
|
||||
$ cc_prop = true
|
||||
$ is_need = false
|
||||
$ is_need = (f$extract(0,4,cdef) .eqs. "NEED") .or. (test_inv .eq. true)
|
||||
$ if f$search(th) .eqs. "" then create 'th'
|
||||
$ set message/nofac/noident/nosever/notext
|
||||
$ on error then continue
|
||||
$ cc 'tmpnam'
|
||||
$ if .not. ($status) then cc_prop = false
|
||||
$ on error then continue
|
||||
$! The headers might lie about the capabilities of the RTL
|
||||
$ link 'tmpnam',tmp.opt/opt
|
||||
$ if .not. ($status) then cc_prop = false
|
||||
$ set message/fac/ident/sever/text
|
||||
$ on error then goto err_exit
|
||||
$ delete/nolog 'tmpnam'.*;*/exclude='th'
|
||||
$ if (cc_prop .and. .not. is_need) .or. -
|
||||
(.not. cc_prop .and. is_need)
|
||||
$ then
|
||||
$ write sys$output "Checking for ''cdef'... yes"
|
||||
$ if f$type('cdef_val'_yes) .nes. ""
|
||||
$ then
|
||||
$ if f$type('cdef_val'_yes) .eqs. "INTEGER" -
|
||||
then call write_config f$fao("#define !AS !UL",cdef,'cdef_val'_yes)
|
||||
$ if f$type('cdef_val'_yes) .eqs. "STRING" -
|
||||
then call write_config f$fao("#define !AS !AS",cdef,'cdef_val'_yes)
|
||||
$ else
|
||||
$ call write_config f$fao("#define !AS 1",cdef)
|
||||
$ endif
|
||||
$ if (cdef .eqs. "HAVE_FSEEKO") .or. (cdef .eqs. "_LARGE_FILES") .or. -
|
||||
(cdef .eqs. "_LARGEFILE64_SOURCE") then -
|
||||
call write_config f$string("#define _LARGEFILE 1")
|
||||
$ else
|
||||
$ write sys$output "Checking for ''cdef'... no"
|
||||
$ if (comm_h)
|
||||
$ then
|
||||
call write_config f$fao("/* !AS */",line)
|
||||
$ else
|
||||
$ if f$type('cdef_val'_no) .nes. ""
|
||||
$ then
|
||||
$ if f$type('cdef_val'_no) .eqs. "INTEGER" -
|
||||
then call write_config f$fao("#define !AS !UL",cdef,'cdef_val'_no)
|
||||
$ if f$type('cdef_val'_no) .eqs. "STRING" -
|
||||
then call write_config f$fao("#define !AS !AS",cdef,'cdef_val'_no)
|
||||
$ else
|
||||
$ call write_config f$fao("#undef !AS",cdef)
|
||||
$ endif
|
||||
$ endif
|
||||
$ endif
|
||||
$ return
|
||||
$!------------------------------------------------------------------------------
|
||||
$!
|
||||
$! Check for properties of C/C++ compiler with multiple result values
|
||||
$!
|
||||
$! Version history
|
||||
$! 0.01 20040127 First version
|
||||
$! 0.02 20050103 Reconcile changes from cc_prop up to version 0.05
|
||||
$CC_MPROP_CHECK:
|
||||
$ cc_prop = true
|
||||
$ i = 1
|
||||
$ idel = 1
|
||||
$ MT_LOOP:
|
||||
$ if f$type(result_'i') .eqs. "STRING"
|
||||
$ then
|
||||
$ set message/nofac/noident/nosever/notext
|
||||
$ on error then continue
|
||||
$ cc 'tmpnam'_'i'
|
||||
$ if .not. ($status) then cc_prop = false
|
||||
$ on error then continue
|
||||
$! The headers might lie about the capabilities of the RTL
|
||||
$ link 'tmpnam'_'i',tmp.opt/opt
|
||||
$ if .not. ($status) then cc_prop = false
|
||||
$ set message/fac/ident/sever/text
|
||||
$ on error then goto err_exit
|
||||
$ delete/nolog 'tmpnam'_'i'.*;*
|
||||
$ if (cc_prop)
|
||||
$ then
|
||||
$ write sys$output "Checking for ''cdef'... ", mdef_'i'
|
||||
$ if f$type(mdef_'i') .eqs. "INTEGER" -
|
||||
then call write_config f$fao("#define !AS !UL",cdef,mdef_'i')
|
||||
$ if f$type('cdef_val'_yes) .eqs. "STRING" -
|
||||
then call write_config f$fao("#define !AS !AS",cdef,mdef_'i')
|
||||
$ goto msym_clean
|
||||
$ else
|
||||
$ i = i + 1
|
||||
$ goto mt_loop
|
||||
$ endif
|
||||
$ endif
|
||||
$ write sys$output "Checking for ''cdef'... no"
|
||||
$ call write_config f$fao("#undef !AS",cdef)
|
||||
$ MSYM_CLEAN:
|
||||
$ if (idel .le. msym_max)
|
||||
$ then
|
||||
$ delete/sym mdef_'idel'
|
||||
$ idel = idel + 1
|
||||
$ goto msym_clean
|
||||
$ endif
|
||||
$ return
|
||||
$!------------------------------------------------------------------------------
|
||||
$!
|
||||
$! Analyze Object files for OpenVMS AXP to extract Procedure and Data
|
||||
$! information to build a symbol vector for a shareable image
|
||||
$! All the "brains" of this logic was suggested by Hartmut Becker
|
||||
@ -533,3 +787,16 @@ $ EXIT_AA:
|
||||
$ if V then set verify
|
||||
$ endsubroutine
|
||||
$!------------------------------------------------------------------------------
|
||||
$!
|
||||
$! Write configuration to both permanent and temporary config file
|
||||
$!
|
||||
$! Version history
|
||||
$! 0.01 20031029 First version to receive a number
|
||||
$!
|
||||
$WRITE_CONFIG: SUBROUTINE
|
||||
$ write aconf 'p1'
|
||||
$ open/append confh 'th'
|
||||
$ write confh 'p1'
|
||||
$ close confh
|
||||
$ENDSUBROUTINE
|
||||
$!------------------------------------------------------------------------------
|
||||
|
||||
971
old/zlib.html
971
old/zlib.html
@ -1,971 +0,0 @@
|
||||
<html>
|
||||
<head>
|
||||
<title>
|
||||
zlib general purpose compression library version 1.1.4
|
||||
</title>
|
||||
</head>
|
||||
<body bgcolor="White" text="Black" vlink="Red" alink="Navy" link="Red">
|
||||
<!-- background="zlibbg.gif" -->
|
||||
|
||||
<h1> zlib 1.1.4 Manual </h1>
|
||||
<hr>
|
||||
<a name="Contents"><h2>Contents</h2>
|
||||
<ol type="I">
|
||||
<li> <a href="#Prologue">Prologue</a>
|
||||
<li> <a href="#Introduction">Introduction</a>
|
||||
<li> <a href="#Utility functions">Utility functions</a>
|
||||
<li> <a href="#Basic functions">Basic functions</a>
|
||||
<li> <a href="#Advanced functions">Advanced functions</a>
|
||||
<li> <a href="#Constants">Constants</a>
|
||||
<li> <a href="#struct z_stream_s">struct z_stream_s</a>
|
||||
<li> <a href="#Checksum functions">Checksum functions</a>
|
||||
<li> <a href="#Misc">Misc</a>
|
||||
</ol>
|
||||
<hr>
|
||||
<a name="Prologue"><h2> Prologue </h2>
|
||||
'zlib' general purpose compression library version 1.1.4, March 11th, 2002
|
||||
<p>
|
||||
Copyright (C) 1995-2002 Jean-loup Gailly and Mark Adler
|
||||
<p>
|
||||
This software is provided 'as-is', without any express or implied
|
||||
warranty. In no event will the authors be held liable for any damages
|
||||
arising from the use of this software.
|
||||
<p>
|
||||
Permission is granted to anyone to use this software for any purpose,
|
||||
including commercial applications, and to alter it and redistribute it
|
||||
freely, subject to the following restrictions:
|
||||
<ol>
|
||||
<li> The origin of this software must not be misrepresented ; you must not
|
||||
claim that you wrote the original software. If you use this software
|
||||
in a product, an acknowledgment in the product documentation would be
|
||||
appreciated but is not required.
|
||||
<li> Altered source versions must be plainly marked as such, and must not be
|
||||
misrepresented as being the original software.
|
||||
<li> This notice may not be removed or altered from any source distribution.
|
||||
</ol>
|
||||
|
||||
<dl>
|
||||
<dt>Jean-loup Gailly
|
||||
<dd><a href="mailto:jloup@gzip.org">jloup@gzip.org</a>
|
||||
<dt>Mark Adler
|
||||
<dd><a href="mailto:madler@alumni.caltech.edu">madler@alumni.caltech.edu</a>
|
||||
</dl>
|
||||
|
||||
The data format used by the zlib library is described by RFCs (Request for
|
||||
Comments) 1950 to 1952 in the files
|
||||
<a href="ftp://ds.internic.net/rfc/rfc1950.txt">
|
||||
ftp://ds.internic.net/rfc/rfc1950.txt </a>
|
||||
(zlib format),
|
||||
<a href="ftp://ds.internic.net/rfc/rfc1951.txt">
|
||||
rfc1951.txt </a>
|
||||
(<a href="#deflate">deflate</a> format) and
|
||||
<a href="ftp://ds.internic.net/rfc/rfc1952.txt">
|
||||
rfc1952.txt </a>
|
||||
(gzip format).
|
||||
<p>
|
||||
This manual is converted from zlib.h by
|
||||
<a href="mailto:piaip@csie.ntu.edu.tw"> piaip </a>
|
||||
<p>
|
||||
Visit <a href="http://ftp.cdrom.com/pub/infozip/zlib/">
|
||||
http://ftp.cdrom.com/pub/infozip/zlib/</a>
|
||||
for the official zlib web page.
|
||||
<p>
|
||||
|
||||
<hr>
|
||||
<a name="Introduction"><h2> Introduction </h2>
|
||||
The 'zlib' compression library provides in-memory compression and
|
||||
decompression functions, including integrity checks of the uncompressed
|
||||
data. This version of the library supports only one compression method
|
||||
(deflation) but other algorithms will be added later and will have the same
|
||||
stream interface.
|
||||
<p>
|
||||
|
||||
Compression can be done in a single step if the buffers are large
|
||||
enough (for example if an input file is mmap'ed), or can be done by
|
||||
repeated calls of the compression function. In the latter case, the
|
||||
application must provide more input and/or consume the output
|
||||
(providing more output space) before each call.
|
||||
<p>
|
||||
|
||||
The library also supports reading and writing files in gzip (.gz) format
|
||||
with an interface similar to that of stdio.
|
||||
<p>
|
||||
|
||||
The library does not install any signal handler. The decoder checks
|
||||
the consistency of the compressed data, so the library should never
|
||||
crash even in case of corrupted input.
|
||||
<p>
|
||||
|
||||
<hr>
|
||||
<a name="Utility functions"><h2> Utility functions </h2>
|
||||
The following utility functions are implemented on top of the
|
||||
<a href="#Basic functions">basic stream-oriented functions</a>.
|
||||
To simplify the interface, some
|
||||
default options are assumed (compression level and memory usage,
|
||||
standard memory allocation functions). The source code of these
|
||||
utility functions can easily be modified if you need special options.
|
||||
<h3> Function list </h3>
|
||||
<ul>
|
||||
<li> int <a href="#compress">compress</a> (Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen);
|
||||
<li> int <a href="#compress2">compress2</a> (Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen, int level);
|
||||
<li> int <a href="#uncompress">uncompress</a> (Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen);
|
||||
<li> typedef voidp gzFile;
|
||||
<li> gzFile <a href="#gzopen">gzopen</a> (const char *path, const char *mode);
|
||||
<li> gzFile <a href="#gzdopen">gzdopen</a> (int fd, const char *mode);
|
||||
<li> int <a href="#gzsetparams">gzsetparams</a> (gzFile file, int level, int strategy);
|
||||
<li> int <a href="#gzread">gzread</a> (gzFile file, voidp buf, unsigned len);
|
||||
<li> int <a href="#gzwrite">gzwrite</a> (gzFile file, const voidp buf, unsigned len);
|
||||
<li> int VA <a href="#gzprintf">gzprintf</a> (gzFile file, const char *format, ...);
|
||||
<li> int <a href="#gzputs">gzputs</a> (gzFile file, const char *s);
|
||||
<li> char * <a href="#gzgets">gzgets</a> (gzFile file, char *buf, int len);
|
||||
<li> int <a href="#gzputc">gzputc</a> (gzFile file, int c);
|
||||
<li> int <a href="#gzgetc">gzgetc</a> (gzFile file);
|
||||
<li> int <a href="#gzflush">gzflush</a> (gzFile file, int flush);
|
||||
<li> z_off_t <a href="#gzseek">gzseek</a> (gzFile file, z_off_t offset, int whence);
|
||||
<li> z_off_t <a href="#gztell">gztell</a> (gzFile file);
|
||||
<li> int <a href="#gzrewind">gzrewind</a> (gzFile file);
|
||||
<li> int <a href="#gzeof">gzeof</a> (gzFile file);
|
||||
<li> int <a href="#gzclose">gzclose</a> (gzFile file);
|
||||
<li> const char * <a href="#gzerror">gzerror</a> (gzFile file, int *errnum);
|
||||
</ul>
|
||||
<h3> Function description </h3>
|
||||
<dl>
|
||||
<font color="Blue"><dt> int <a name="compress">compress</a> (Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen);</font>
|
||||
<dd>
|
||||
Compresses the source buffer into the destination buffer. sourceLen is
|
||||
the byte length of the source buffer. Upon entry, destLen is the total
|
||||
size of the destination buffer, which must be at least 0.1% larger than
|
||||
sourceLen plus 12 bytes. Upon exit, destLen is the actual size of the
|
||||
compressed buffer.<p>
|
||||
This function can be used to <a href="#compress">compress</a> a whole file at once if the
|
||||
input file is mmap'ed.<p>
|
||||
<a href="#compress">compress</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not
|
||||
enough memory, <a href="#Z_BUF_ERROR">Z_BUF_ERROR</a> if there was not enough room in the output
|
||||
buffer.<p>
|
||||
|
||||
<font color="Blue"><dt> int <a name="compress2">compress2</a> (Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen, int level);</font>
|
||||
<dd>
|
||||
Compresses the source buffer into the destination buffer. The level
|
||||
parameter has the same meaning as in <a href="#deflateInit">deflateInit</a>. sourceLen is the byte
|
||||
length of the source buffer. Upon entry, destLen is the total size of the
|
||||
destination buffer, which must be at least 0.1% larger than sourceLen plus
|
||||
12 bytes. Upon exit, destLen is the actual size of the compressed buffer.
|
||||
<p>
|
||||
|
||||
<a href="#compress2">compress2</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not enough
|
||||
memory, <a href="#Z_BUF_ERROR">Z_BUF_ERROR</a> if there was not enough room in the output buffer,
|
||||
<a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the level parameter is invalid.
|
||||
<p>
|
||||
|
||||
<font color="Blue"><dt> int <a name="uncompress">uncompress</a> (Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen);</font>
|
||||
<dd>
|
||||
Decompresses the source buffer into the destination buffer. sourceLen is
|
||||
the byte length of the source buffer. Upon entry, destLen is the total
|
||||
size of the destination buffer, which must be large enough to hold the
|
||||
entire uncompressed data. (The size of the uncompressed data must have
|
||||
been saved previously by the compressor and transmitted to the decompressor
|
||||
by some mechanism outside the scope of this compression library.)
|
||||
Upon exit, destLen is the actual size of the compressed buffer. <p>
|
||||
This function can be used to decompress a whole file at once if the
|
||||
input file is mmap'ed.
|
||||
<p>
|
||||
|
||||
<a href="#uncompress">uncompress</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not
|
||||
enough memory, <a href="#Z_BUF_ERROR">Z_BUF_ERROR</a> if there was not enough room in the output
|
||||
buffer, or <a href="#Z_DATA_ERROR">Z_DATA_ERROR</a> if the input data was corrupted.
|
||||
<p>
|
||||
|
||||
<dt> typedef voidp gzFile;
|
||||
<dd> <p>
|
||||
|
||||
<font color="Blue"><dt> gzFile <a name="gzopen">gzopen</a> (const char *path, const char *mode);</font>
|
||||
<dd>
|
||||
Opens a gzip (.gz) file for reading or writing. The mode parameter
|
||||
is as in fopen ("rb" or "wb") but can also include a compression level
|
||||
("wb9") or a strategy: 'f' for filtered data as in "wb6f", 'h' for
|
||||
Huffman only compression as in "wb1h". (See the description
|
||||
of <a href="#deflateInit2">deflateInit2</a> for more information about the strategy parameter.)
|
||||
<p>
|
||||
|
||||
<a href="#gzopen">gzopen</a> can be used to read a file which is not in gzip format ; in this
|
||||
case <a href="#gzread">gzread</a> will directly read from the file without decompression.
|
||||
<p>
|
||||
|
||||
<a href="#gzopen">gzopen</a> returns NULL if the file could not be opened or if there was
|
||||
insufficient memory to allocate the (de)compression <a href="#state">state</a> ; errno
|
||||
can be checked to distinguish the two cases (if errno is zero, the
|
||||
zlib error is <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a>).
|
||||
<p>
|
||||
|
||||
<font color="Blue"><dt> gzFile <a name="gzdopen">gzdopen</a> (int fd, const char *mode);</font>
|
||||
<dd>
|
||||
<a href="#gzdopen">gzdopen</a>() associates a gzFile with the file descriptor fd. File
|
||||
descriptors are obtained from calls like open, dup, creat, pipe or
|
||||
fileno (in the file has been previously opened with fopen).
|
||||
The mode parameter is as in <a href="#gzopen">gzopen</a>.
|
||||
<p>
|
||||
The next call of <a href="#gzclose">gzclose</a> on the returned gzFile will also close the
|
||||
file descriptor fd, just like fclose(fdopen(fd), mode) closes the file
|
||||
descriptor fd. If you want to keep fd open, use <a href="#gzdopen">gzdopen</a>(dup(fd), mode).
|
||||
<p>
|
||||
<a href="#gzdopen">gzdopen</a> returns NULL if there was insufficient memory to allocate
|
||||
the (de)compression <a href="#state">state</a>.
|
||||
<p>
|
||||
|
||||
<font color="Blue"><dt> int <a name="gzsetparams">gzsetparams</a> (gzFile file, int level, int strategy);</font>
|
||||
<dd>
|
||||
Dynamically update the compression level or strategy. See the description
|
||||
of <a href="#deflateInit2">deflateInit2</a> for the meaning of these parameters.
|
||||
<p>
|
||||
<a href="#gzsetparams">gzsetparams</a> returns <a href="#Z_OK">Z_OK</a> if success, or <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the file was not
|
||||
opened for writing.
|
||||
<p>
|
||||
|
||||
<font color="Blue"><dt> int <a name="gzread">gzread</a> (gzFile file, voidp buf, unsigned len);</font>
|
||||
<dd>
|
||||
Reads the given number of uncompressed bytes from the compressed file.
|
||||
If the input file was not in gzip format, <a href="#gzread">gzread</a> copies the given number
|
||||
of bytes into the buffer.
|
||||
<p>
|
||||
<a href="#gzread">gzread</a> returns the number of uncompressed bytes actually read (0 for
|
||||
end of file, -1 for error).
|
||||
<p>
|
||||
|
||||
<font color="Blue"><dt> int <a name="gzwrite">gzwrite</a> (gzFile file, const voidp buf, unsigned len);</font>
|
||||
<dd>
|
||||
Writes the given number of uncompressed bytes into the compressed file.
|
||||
<a href="#gzwrite">gzwrite</a> returns the number of uncompressed bytes actually written
|
||||
(0 in case of error).
|
||||
<p>
|
||||
|
||||
<font color="Blue"><dt> int VA <a name="gzprintf">gzprintf</a> (gzFile file, const char *format, ...);</font>
|
||||
<dd>
|
||||
Converts, formats, and writes the args to the compressed file under
|
||||
control of the format string, as in fprintf. <a href="#gzprintf">gzprintf</a> returns the number of
|
||||
uncompressed bytes actually written (0 in case of error).
|
||||
<p>
|
||||
|
||||
<font color="Blue"><dt> int <a name="gzputs">gzputs</a> (gzFile file, const char *s);</font>
|
||||
<dd>
|
||||
Writes the given null-terminated string to the compressed file, excluding
|
||||
the terminating null character.
|
||||
<p>
|
||||
<a href="#gzputs">gzputs</a> returns the number of characters written, or -1 in case of error.
|
||||
<p>
|
||||
|
||||
<font color="Blue"><dt> char * <a name="gzgets">gzgets</a> (gzFile file, char *buf, int len);</font>
|
||||
<dd>
|
||||
Reads bytes from the compressed file until len-1 characters are read, or
|
||||
a newline character is read and transferred to buf, or an end-of-file
|
||||
condition is encountered. The string is then terminated with a null
|
||||
character.
|
||||
<p>
|
||||
<a href="#gzgets">gzgets</a> returns buf, or <a href="#Z_NULL">Z_NULL</a> in case of error.
|
||||
<p>
|
||||
|
||||
<font color="Blue"><dt> int <a name="gzputc">gzputc</a> (gzFile file, int c);</font>
|
||||
<dd>
|
||||
Writes c, converted to an unsigned char, into the compressed file.
|
||||
<a href="#gzputc">gzputc</a> returns the value that was written, or -1 in case of error.
|
||||
<p>
|
||||
|
||||
<font color="Blue"><dt> int <a name="gzgetc">gzgetc</a> (gzFile file);</font>
|
||||
<dd>
|
||||
Reads one byte from the compressed file. <a href="#gzgetc">gzgetc</a> returns this byte
|
||||
or -1 in case of end of file or error.
|
||||
<p>
|
||||
|
||||
<font color="Blue"><dt> int <a name="gzflush">gzflush</a> (gzFile file, int flush);</font>
|
||||
<dd>
|
||||
Flushes all pending output into the compressed file. The parameter
|
||||
flush is as in the <a href="#deflate">deflate</a>() function. The return value is the zlib
|
||||
error number (see function <a href="#gzerror">gzerror</a> below). <a href="#gzflush">gzflush</a> returns <a href="#Z_OK">Z_OK</a> if
|
||||
the flush parameter is <a href="#Z_FINISH">Z_FINISH</a> and all output could be flushed.
|
||||
<p>
|
||||
<a href="#gzflush">gzflush</a> should be called only when strictly necessary because it can
|
||||
degrade compression.
|
||||
<p>
|
||||
|
||||
<font color="Blue"><dt> z_off_t <a name="gzseek">gzseek</a> (gzFile file, z_off_t offset, int whence);</font>
|
||||
<dd>
|
||||
Sets the starting position for the next <a href="#gzread">gzread</a> or <a href="#gzwrite">gzwrite</a> on the
|
||||
given compressed file. The offset represents a number of bytes in the
|
||||
uncompressed data stream. The whence parameter is defined as in lseek(2);
|
||||
the value SEEK_END is not supported.
|
||||
<p>
|
||||
If the file is opened for reading, this function is emulated but can be
|
||||
extremely slow. If the file is opened for writing, only forward seeks are
|
||||
supported ; <a href="#gzseek">gzseek</a> then compresses a sequence of zeroes up to the new
|
||||
starting position.
|
||||
<p>
|
||||
<a href="#gzseek">gzseek</a> returns the resulting offset location as measured in bytes from
|
||||
the beginning of the uncompressed stream, or -1 in case of error, in
|
||||
particular if the file is opened for writing and the new starting position
|
||||
would be before the current position.
|
||||
<p>
|
||||
|
||||
<font color="Blue"><dt> int <a name="gzrewind">gzrewind</a> (gzFile file);</font>
|
||||
<dd>
|
||||
Rewinds the given file. This function is supported only for reading.
|
||||
<p>
|
||||
<a href="#gzrewind">gzrewind</a>(file) is equivalent to (int)<a href="#gzseek">gzseek</a>(file, 0L, SEEK_SET)
|
||||
<p>
|
||||
|
||||
<font color="Blue"><dt> z_off_t <a name="gztell">gztell</a> (gzFile file);</font>
|
||||
<dd>
|
||||
Returns the starting position for the next <a href="#gzread">gzread</a> or <a href="#gzwrite">gzwrite</a> on the
|
||||
given compressed file. This position represents a number of bytes in the
|
||||
uncompressed data stream.
|
||||
<p>
|
||||
|
||||
<a href="#gztell">gztell</a>(file) is equivalent to <a href="#gzseek">gzseek</a>(file, 0L, SEEK_CUR)
|
||||
<p>
|
||||
|
||||
<font color="Blue"><dt> int <a name="gzeof">gzeof</a> (gzFile file);</font>
|
||||
<dd>
|
||||
Returns 1 when EOF has previously been detected reading the given
|
||||
input stream, otherwise zero.
|
||||
<p>
|
||||
|
||||
<font color="Blue"><dt> int <a name="gzclose">gzclose</a> (gzFile file);</font>
|
||||
<dd>
|
||||
Flushes all pending output if necessary, closes the compressed file
|
||||
and deallocates all the (de)compression <a href="#state">state</a>. The return value is the zlib
|
||||
error number (see function <a href="#gzerror">gzerror</a> below).
|
||||
<p>
|
||||
|
||||
<font color="Blue"><dt> const char * <a name="gzerror">gzerror</a> (gzFile file, int *errnum);</font>
|
||||
<dd>
|
||||
Returns the error message for the last error which occurred on the
|
||||
given compressed file. errnum is set to zlib error number. If an
|
||||
error occurred in the file system and not in the compression library,
|
||||
errnum is set to <a href="#Z_ERRNO">Z_ERRNO</a> and the application may consult errno
|
||||
to get the exact error code.
|
||||
<p>
|
||||
</dl>
|
||||
<hr>
|
||||
<a name="Basic functions"><h2> Basic functions </h2>
|
||||
<h3> Function list </h3>
|
||||
<ul>
|
||||
<li> const char * <a href="#zlibVersion">zlibVersion</a> (void);
|
||||
<li> int <a href="#deflateInit">deflateInit</a> (<a href="#z_streamp">z_streamp</a> strm, int level);
|
||||
<li> int <a href="#deflate">deflate</a> (<a href="#z_streamp">z_streamp</a> strm, int flush);
|
||||
<li> int <a href="#deflateEnd">deflateEnd</a> (<a href="#z_streamp">z_streamp</a> strm);
|
||||
<li> int <a href="#inflateInit">inflateInit</a> (<a href="#z_streamp">z_streamp</a> strm);
|
||||
<li> int <a href="#inflate">inflate</a> (<a href="#z_streamp">z_streamp</a> strm, int flush);
|
||||
<li> int <a href="#inflateEnd">inflateEnd</a> (<a href="#z_streamp">z_streamp</a> strm);
|
||||
</ul>
|
||||
|
||||
<h3> Function description </h3>
|
||||
<dl>
|
||||
<font color="Blue"><dt> const char * <a name="zlibVersion">zlibVersion</a> (void);</font>
|
||||
<dd> The application can compare <a href="#zlibVersion">zlibVersion</a> and ZLIB_VERSION for consistency.
|
||||
If the first character differs, the library code actually used is
|
||||
not compatible with the zlib.h header file used by the application.
|
||||
This check is automatically made by <a href="#deflateInit">deflateInit</a> and <a href="#inflateInit">inflateInit</a>.
|
||||
<p>
|
||||
|
||||
<font color="Blue"><dt> int <a name="deflateInit">deflateInit</a> (<a href="#z_streamp">z_streamp</a> strm, int level);</font>
|
||||
<dd>
|
||||
Initializes the internal stream <a href="#state">state</a> for compression. The fields
|
||||
<a href="#zalloc">zalloc</a>, <a href="#zfree">zfree</a> and <a href="#opaque">opaque</a> must be initialized before by the caller.
|
||||
If <a href="#zalloc">zalloc</a> and <a href="#zfree">zfree</a> are set to <a href="#Z_NULL">Z_NULL</a>, <a href="#deflateInit">deflateInit</a> updates them to
|
||||
use default allocation functions.
|
||||
<p>
|
||||
|
||||
The compression level must be <a href="#Z_DEFAULT_COMPRESSION">Z_DEFAULT_COMPRESSION</a>, or between 0 and 9:
|
||||
1 gives best speed, 9 gives best compression, 0 gives no compression at
|
||||
all (the input data is simply copied a block at a time).
|
||||
<p>
|
||||
|
||||
<a href="#Z_DEFAULT_COMPRESSION">Z_DEFAULT_COMPRESSION</a> requests a default compromise between speed and
|
||||
compression (currently equivalent to level 6).
|
||||
<p>
|
||||
|
||||
<a href="#deflateInit">deflateInit</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not
|
||||
enough memory, <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if level is not a valid compression level,
|
||||
<a href="#Z_VERSION_ERROR">Z_VERSION_ERROR</a> if the zlib library version (<a href="#zlib_version">zlib_version</a>) is incompatible
|
||||
with the version assumed by the caller (ZLIB_VERSION).
|
||||
<a href="#msg">msg</a> is set to null if there is no error message. <a href="#deflateInit">deflateInit</a> does not
|
||||
perform any compression: this will be done by <a href="#deflate">deflate</a>().
|
||||
<p>
|
||||
|
||||
<font color="Blue"><dt> int <a name="deflate">deflate</a> (<a href="#z_streamp">z_streamp</a> strm, int flush);</font>
|
||||
<dd>
|
||||
<a href="#deflate">deflate</a> compresses as much data as possible, and stops when the input
|
||||
buffer becomes empty or the output buffer becomes full. It may introduce some
|
||||
output latency (reading input without producing any output) except when
|
||||
forced to flush.<p>
|
||||
|
||||
The detailed semantics are as follows. <a href="#deflate">deflate</a> performs one or both of the
|
||||
following actions:
|
||||
|
||||
<ul>
|
||||
<li> Compress more input starting at <a href="#next_in">next_in</a> and update <a href="#next_in">next_in</a> and <a href="#avail_in">avail_in</a>
|
||||
accordingly. If not all input can be processed (because there is not
|
||||
enough room in the output buffer), <a href="#next_in">next_in</a> and <a href="#avail_in">avail_in</a> are updated and
|
||||
processing will resume at this point for the next call of <a href="#deflate">deflate</a>().
|
||||
|
||||
<li>
|
||||
Provide more output starting at <a href="#next_out">next_out</a> and update <a href="#next_out">next_out</a> and <a href="#avail_out">avail_out</a>
|
||||
accordingly. This action is forced if the parameter flush is non zero.
|
||||
Forcing flush frequently degrades the compression ratio, so this parameter
|
||||
should be set only when necessary (in interactive applications).
|
||||
Some output may be provided even if flush is not set.
|
||||
</ul> <p>
|
||||
|
||||
Before the call of <a href="#deflate">deflate</a>(), the application should ensure that at least
|
||||
one of the actions is possible, by providing more input and/or consuming
|
||||
more output, and updating <a href="#avail_in">avail_in</a> or <a href="#avail_out">avail_out</a> accordingly ; <a href="#avail_out">avail_out</a>
|
||||
should never be zero before the call. The application can consume the
|
||||
compressed output when it wants, for example when the output buffer is full
|
||||
(<a href="#avail_out">avail_out</a> == 0), or after each call of <a href="#deflate">deflate</a>(). If <a href="#deflate">deflate</a> returns <a href="#Z_OK">Z_OK</a>
|
||||
and with zero <a href="#avail_out">avail_out</a>, it must be called again after making room in the
|
||||
output buffer because there might be more output pending.
|
||||
<p>
|
||||
|
||||
If the parameter flush is set to <a href="#Z_SYNC_FLUSH">Z_SYNC_FLUSH</a>, all pending output is
|
||||
flushed to the output buffer and the output is aligned on a byte boundary, so
|
||||
that the decompressor can get all input data available so far. (In particular
|
||||
<a href="#avail_in">avail_in</a> is zero after the call if enough output space has been provided
|
||||
before the call.) Flushing may degrade compression for some compression
|
||||
algorithms and so it should be used only when necessary.
|
||||
<p>
|
||||
|
||||
If flush is set to <a href="#Z_FULL_FLUSH">Z_FULL_FLUSH</a>, all output is flushed as with
|
||||
<a href="#Z_SYNC_FLUSH">Z_SYNC_FLUSH</a>, and the compression <a href="#state">state</a> is reset so that decompression can
|
||||
restart from this point if previous compressed data has been damaged or if
|
||||
random access is desired. Using <a href="#Z_FULL_FLUSH">Z_FULL_FLUSH</a> too often can seriously degrade
|
||||
the compression.
|
||||
<p>
|
||||
|
||||
If <a href="#deflate">deflate</a> returns with <a href="#avail_out">avail_out</a> == 0, this function must be called again
|
||||
with the same value of the flush parameter and more output space (updated
|
||||
<a href="#avail_out">avail_out</a>), until the flush is complete (<a href="#deflate">deflate</a> returns with non-zero
|
||||
<a href="#avail_out">avail_out</a>).
|
||||
<p>
|
||||
|
||||
If the parameter flush is set to <a href="#Z_FINISH">Z_FINISH</a>, pending input is processed,
|
||||
pending output is flushed and <a href="#deflate">deflate</a> returns with <a href="#Z_STREAM_END">Z_STREAM_END</a> if there
|
||||
was enough output space ; if <a href="#deflate">deflate</a> returns with <a href="#Z_OK">Z_OK</a>, this function must be
|
||||
called again with <a href="#Z_FINISH">Z_FINISH</a> and more output space (updated <a href="#avail_out">avail_out</a>) but no
|
||||
more input data, until it returns with <a href="#Z_STREAM_END">Z_STREAM_END</a> or an error. After
|
||||
<a href="#deflate">deflate</a> has returned <a href="#Z_STREAM_END">Z_STREAM_END</a>, the only possible operations on the
|
||||
stream are <a href="#deflateReset">deflateReset</a> or <a href="#deflateEnd">deflateEnd</a>.
|
||||
<p>
|
||||
|
||||
<a href="#Z_FINISH">Z_FINISH</a> can be used immediately after <a href="#deflateInit">deflateInit</a> if all the compression
|
||||
is to be done in a single step. In this case, <a href="#avail_out">avail_out</a> must be at least
|
||||
0.1% larger than <a href="#avail_in">avail_in</a> plus 12 bytes. If <a href="#deflate">deflate</a> does not return
|
||||
<a href="#Z_STREAM_END">Z_STREAM_END</a>, then it must be called again as described above.
|
||||
<p>
|
||||
|
||||
<a href="#deflate">deflate</a>() sets strm-> <a href="#adler">adler</a> to the <a href="#adler32">adler32</a> checksum of all input read
|
||||
so far (that is, <a href="#total_in">total_in</a> bytes).
|
||||
<p>
|
||||
|
||||
<a href="#deflate">deflate</a>() may update <a href="#data_type">data_type</a> if it can make a good guess about
|
||||
the input data type (<a href="#Z_ASCII">Z_ASCII</a> or <a href="#Z_BINARY">Z_BINARY</a>). In doubt, the data is considered
|
||||
binary. This field is only for information purposes and does not affect
|
||||
the compression algorithm in any manner.
|
||||
<p>
|
||||
|
||||
<a href="#deflate">deflate</a>() returns <a href="#Z_OK">Z_OK</a> if some progress has been made (more input
|
||||
processed or more output produced), <a href="#Z_STREAM_END">Z_STREAM_END</a> if all input has been
|
||||
consumed and all output has been produced (only when flush is set to
|
||||
<a href="#Z_FINISH">Z_FINISH</a>), <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the stream <a href="#state">state</a> was inconsistent (for example
|
||||
if <a href="#next_in">next_in</a> or <a href="#next_out">next_out</a> was NULL), <a href="#Z_BUF_ERROR">Z_BUF_ERROR</a> if no progress is possible
|
||||
(for example <a href="#avail_in">avail_in</a> or <a href="#avail_out">avail_out</a> was zero).
|
||||
<p>
|
||||
|
||||
<font color="Blue"><dt> int <a name="deflateEnd">deflateEnd</a> (<a href="#z_streamp">z_streamp</a> strm);</font>
|
||||
<dd>
|
||||
All dynamically allocated data structures for this stream are freed.
|
||||
This function discards any unprocessed input and does not flush any
|
||||
pending output.
|
||||
<p>
|
||||
|
||||
<a href="#deflateEnd">deflateEnd</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the
|
||||
stream <a href="#state">state</a> was inconsistent, <a href="#Z_DATA_ERROR">Z_DATA_ERROR</a> if the stream was freed
|
||||
prematurely (some input or output was discarded). In the error case,
|
||||
<a href="#msg">msg</a> may be set but then points to a static string (which must not be
|
||||
deallocated).
|
||||
<p>
|
||||
|
||||
<font color="Blue"><dt> int <a name="inflateInit">inflateInit</a> (<a href="#z_streamp">z_streamp</a> strm);</font>
|
||||
<dd>
|
||||
Initializes the internal stream <a href="#state">state</a> for decompression. The fields
|
||||
<a href="#next_in">next_in</a>, <a href="#avail_in">avail_in</a>, <a href="#zalloc">zalloc</a>, <a href="#zfree">zfree</a> and <a href="#opaque">opaque</a> must be initialized before by
|
||||
the caller. If <a href="#next_in">next_in</a> is not <a href="#Z_NULL">Z_NULL</a> and <a href="#avail_in">avail_in</a> is large enough (the exact
|
||||
value depends on the compression method), <a href="#inflateInit">inflateInit</a> determines the
|
||||
compression method from the zlib header and allocates all data structures
|
||||
accordingly ; otherwise the allocation will be deferred to the first call of
|
||||
<a href="#inflate">inflate</a>. If <a href="#zalloc">zalloc</a> and <a href="#zfree">zfree</a> are set to <a href="#Z_NULL">Z_NULL</a>, <a href="#inflateInit">inflateInit</a> updates them to
|
||||
use default allocation functions.
|
||||
<p>
|
||||
|
||||
<a href="#inflateInit">inflateInit</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not enough
|
||||
memory, <a href="#Z_VERSION_ERROR">Z_VERSION_ERROR</a> if the zlib library version is incompatible with the
|
||||
version assumed by the caller. <a href="#msg">msg</a> is set to null if there is no error
|
||||
message. <a href="#inflateInit">inflateInit</a> does not perform any decompression apart from reading
|
||||
the zlib header if present: this will be done by <a href="#inflate">inflate</a>(). (So <a href="#next_in">next_in</a> and
|
||||
<a href="#avail_in">avail_in</a> may be modified, but <a href="#next_out">next_out</a> and <a href="#avail_out">avail_out</a> are unchanged.)
|
||||
<p>
|
||||
|
||||
<font color="Blue"><dt> int <a name="inflate">inflate</a> (<a href="#z_streamp">z_streamp</a> strm, int flush);</font>
|
||||
<dd>
|
||||
<a href="#inflate">inflate</a> decompresses as much data as possible, and stops when the input
|
||||
buffer becomes empty or the output buffer becomes full. It may some
|
||||
introduce some output latency (reading input without producing any output)
|
||||
except when forced to flush.
|
||||
<p>
|
||||
|
||||
The detailed semantics are as follows. <a href="#inflate">inflate</a> performs one or both of the
|
||||
following actions:
|
||||
|
||||
<ul>
|
||||
<li> Decompress more input starting at <a href="#next_in">next_in</a> and update <a href="#next_in">next_in</a> and <a href="#avail_in">avail_in</a>
|
||||
accordingly. If not all input can be processed (because there is not
|
||||
enough room in the output buffer), <a href="#next_in">next_in</a> is updated and processing
|
||||
will resume at this point for the next call of <a href="#inflate">inflate</a>().
|
||||
|
||||
<li> Provide more output starting at <a href="#next_out">next_out</a> and update <a href="#next_out">next_out</a> and
|
||||
<a href="#avail_out">avail_out</a> accordingly. <a href="#inflate">inflate</a>() provides as much output as possible,
|
||||
until there is no more input data or no more space in the output buffer
|
||||
(see below about the flush parameter).
|
||||
</ul> <p>
|
||||
|
||||
Before the call of <a href="#inflate">inflate</a>(), the application should ensure that at least
|
||||
one of the actions is possible, by providing more input and/or consuming
|
||||
more output, and updating the next_* and avail_* values accordingly.
|
||||
The application can consume the uncompressed output when it wants, for
|
||||
example when the output buffer is full (<a href="#avail_out">avail_out</a> == 0), or after each
|
||||
call of <a href="#inflate">inflate</a>(). If <a href="#inflate">inflate</a> returns <a href="#Z_OK">Z_OK</a> and with zero <a href="#avail_out">avail_out</a>, it
|
||||
must be called again after making room in the output buffer because there
|
||||
might be more output pending.
|
||||
<p>
|
||||
|
||||
If the parameter flush is set to <a href="#Z_SYNC_FLUSH">Z_SYNC_FLUSH</a>, <a href="#inflate">inflate</a> flushes as much
|
||||
output as possible to the output buffer. The flushing behavior of <a href="#inflate">inflate</a> is
|
||||
not specified for values of the flush parameter other than <a href="#Z_SYNC_FLUSH">Z_SYNC_FLUSH</a>
|
||||
and <a href="#Z_FINISH">Z_FINISH</a>, but the current implementation actually flushes as much output
|
||||
as possible anyway.
|
||||
<p>
|
||||
|
||||
<a href="#inflate">inflate</a>() should normally be called until it returns <a href="#Z_STREAM_END">Z_STREAM_END</a> or an
|
||||
error. However if all decompression is to be performed in a single step
|
||||
(a single call of <a href="#inflate">inflate</a>), the parameter flush should be set to
|
||||
<a href="#Z_FINISH">Z_FINISH</a>. In this case all pending input is processed and all pending
|
||||
output is flushed ; <a href="#avail_out">avail_out</a> must be large enough to hold all the
|
||||
uncompressed data. (The size of the uncompressed data may have been saved
|
||||
by the compressor for this purpose.) The next operation on this stream must
|
||||
be <a href="#inflateEnd">inflateEnd</a> to deallocate the decompression <a href="#state">state</a>. The use of <a href="#Z_FINISH">Z_FINISH</a>
|
||||
is never required, but can be used to inform <a href="#inflate">inflate</a> that a faster routine
|
||||
may be used for the single <a href="#inflate">inflate</a>() call.
|
||||
<p>
|
||||
|
||||
If a preset dictionary is needed at this point (see <a href="#inflateSetDictionary">inflateSetDictionary</a>
|
||||
below), <a href="#inflate">inflate</a> sets strm-<a href="#adler">adler</a> to the <a href="#adler32">adler32</a> checksum of the
|
||||
dictionary chosen by the compressor and returns <a href="#Z_NEED_DICT">Z_NEED_DICT</a> ; otherwise
|
||||
it sets strm-> <a href="#adler">adler</a> to the <a href="#adler32">adler32</a> checksum of all output produced
|
||||
so far (that is, <a href="#total_out">total_out</a> bytes) and returns <a href="#Z_OK">Z_OK</a>, <a href="#Z_STREAM_END">Z_STREAM_END</a> or
|
||||
an error code as described below. At the end of the stream, <a href="#inflate">inflate</a>()
|
||||
checks that its computed <a href="#adler32">adler32</a> checksum is equal to that saved by the
|
||||
compressor and returns <a href="#Z_STREAM_END">Z_STREAM_END</a> only if the checksum is correct.
|
||||
<p>
|
||||
|
||||
<a href="#inflate">inflate</a>() returns <a href="#Z_OK">Z_OK</a> if some progress has been made (more input processed
|
||||
or more output produced), <a href="#Z_STREAM_END">Z_STREAM_END</a> if the end of the compressed data has
|
||||
been reached and all uncompressed output has been produced, <a href="#Z_NEED_DICT">Z_NEED_DICT</a> if a
|
||||
preset dictionary is needed at this point, <a href="#Z_DATA_ERROR">Z_DATA_ERROR</a> if the input data was
|
||||
corrupted (input stream not conforming to the zlib format or incorrect
|
||||
<a href="#adler32">adler32</a> checksum), <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the stream structure was inconsistent
|
||||
(for example if <a href="#next_in">next_in</a> or <a href="#next_out">next_out</a> was NULL), <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not
|
||||
enough memory, <a href="#Z_BUF_ERROR">Z_BUF_ERROR</a> if no progress is possible or if there was not
|
||||
enough room in the output buffer when <a href="#Z_FINISH">Z_FINISH</a> is used. In the <a href="#Z_DATA_ERROR">Z_DATA_ERROR</a>
|
||||
case, the application may then call <a href="#inflateSync">inflateSync</a> to look for a good
|
||||
compression block.
|
||||
<p>
|
||||
|
||||
<font color="Blue"><dt> int <a name="inflateEnd">inflateEnd</a> (<a href="#z_streamp">z_streamp</a> strm);</font>
|
||||
<dd>
|
||||
All dynamically allocated data structures for this stream are freed.
|
||||
This function discards any unprocessed input and does not flush any
|
||||
pending output.
|
||||
<p>
|
||||
|
||||
<a href="#inflateEnd">inflateEnd</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the stream <a href="#state">state</a>
|
||||
was inconsistent. In the error case, <a href="#msg">msg</a> may be set but then points to a
|
||||
static string (which must not be deallocated).
|
||||
</dl>
|
||||
<hr>
|
||||
<a name="Advanced functions"><h2> Advanced functions </h2>
|
||||
The following functions are needed only in some special applications.
|
||||
<h3> Function list </h3>
|
||||
<ul>
|
||||
<li> int <a href="#deflateInit2">deflateInit2</a> (<a href="#z_streamp">z_streamp</a> strm,
|
||||
<li> int <a href="#deflateSetDictionary">deflateSetDictionary</a> (<a href="#z_streamp">z_streamp</a> strm, const Bytef *dictionary, uInt dictLength);
|
||||
<li> int <a href="#deflateCopy">deflateCopy</a> (<a href="#z_streamp">z_streamp</a> dest, <a href="#z_streamp">z_streamp</a> source);
|
||||
<li> int <a href="#deflateReset">deflateReset</a> (<a href="#z_streamp">z_streamp</a> strm);
|
||||
<li> int <a href="#deflateParams">deflateParams</a> (<a href="#z_streamp">z_streamp</a> strm, int level, int strategy);
|
||||
<li> int <a href="#inflateInit2">inflateInit2</a> (<a href="#z_streamp">z_streamp</a> strm, int windowBits);
|
||||
<li> int <a href="#inflateSetDictionary">inflateSetDictionary</a> (<a href="#z_streamp">z_streamp</a> strm, const Bytef *dictionary, uInt dictLength);
|
||||
<li> int <a href="#inflateSync">inflateSync</a> (<a href="#z_streamp">z_streamp</a> strm);
|
||||
<li> int <a href="#inflateReset">inflateReset</a> (<a href="#z_streamp">z_streamp</a> strm);
|
||||
|
||||
</ul>
|
||||
<h3> Function description </h3>
|
||||
<dl>
|
||||
<font color="Blue"><dt> int <a name="deflateInit2">deflateInit2</a> (<a href="#z_streamp">z_streamp</a> strm, int level, int method, int windowBits, int memLevel, int strategy);</font>
|
||||
|
||||
<dd> This is another version of <a href="#deflateInit">deflateInit</a> with more compression options. The
|
||||
fields <a href="#next_in">next_in</a>, <a href="#zalloc">zalloc</a>, <a href="#zfree">zfree</a> and <a href="#opaque">opaque</a> must be initialized before by
|
||||
the caller.<p>
|
||||
|
||||
The method parameter is the compression method. It must be <a href="#Z_DEFLATED">Z_DEFLATED</a> in
|
||||
this version of the library.<p>
|
||||
|
||||
The windowBits parameter is the base two logarithm of the window size
|
||||
(the size of the history buffer). It should be in the range 8..15 for this
|
||||
version of the library. Larger values of this parameter result in better
|
||||
compression at the expense of memory usage. The default value is 15 if
|
||||
<a href="#deflateInit">deflateInit</a> is used instead.<p>
|
||||
|
||||
The memLevel parameter specifies how much memory should be allocated
|
||||
for the internal compression <a href="#state">state</a>. memLevel=1 uses minimum memory but
|
||||
is slow and reduces compression ratio ; memLevel=9 uses maximum memory
|
||||
for optimal speed. The default value is 8. See zconf.h for total memory
|
||||
usage as a function of windowBits and memLevel.<p>
|
||||
|
||||
The strategy parameter is used to tune the compression algorithm. Use the
|
||||
value <a href="#Z_DEFAULT_STRATEGY">Z_DEFAULT_STRATEGY</a> for normal data, <a href="#Z_FILTERED">Z_FILTERED</a> for data produced by a
|
||||
filter (or predictor), or <a href="#Z_HUFFMAN_ONLY">Z_HUFFMAN_ONLY</a> to force Huffman encoding only (no
|
||||
string match). Filtered data consists mostly of small values with a
|
||||
somewhat random distribution. In this case, the compression algorithm is
|
||||
tuned to <a href="#compress">compress</a> them better. The effect of <a href="#Z_FILTERED">Z_FILTERED</a> is to force more
|
||||
Huffman coding and less string matching ; it is somewhat intermediate
|
||||
between Z_DEFAULT and <a href="#Z_HUFFMAN_ONLY">Z_HUFFMAN_ONLY</a>. The strategy parameter only affects
|
||||
the compression ratio but not the correctness of the compressed output even
|
||||
if it is not set appropriately.<p>
|
||||
|
||||
<a href="#deflateInit2">deflateInit2</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not enough
|
||||
memory, <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if a parameter is invalid (such as an invalid
|
||||
method). <a href="#msg">msg</a> is set to null if there is no error message. <a href="#deflateInit2">deflateInit2</a> does
|
||||
not perform any compression: this will be done by <a href="#deflate">deflate</a>().<p>
|
||||
|
||||
<font color="Blue"><dt> int <a name="deflateSetDictionary">deflateSetDictionary</a> (<a href="#z_streamp">z_streamp</a> strm, const Bytef *dictionary, uInt dictLength);</font>
|
||||
<dd>
|
||||
Initializes the compression dictionary from the given byte sequence
|
||||
without producing any compressed output. This function must be called
|
||||
immediately after <a href="#deflateInit">deflateInit</a>, <a href="#deflateInit2">deflateInit2</a> or <a href="#deflateReset">deflateReset</a>, before any
|
||||
call of <a href="#deflate">deflate</a>. The compressor and decompressor must use exactly the same
|
||||
dictionary (see <a href="#inflateSetDictionary">inflateSetDictionary</a>).<p>
|
||||
|
||||
The dictionary should consist of strings (byte sequences) that are likely
|
||||
to be encountered later in the data to be compressed, with the most commonly
|
||||
used strings preferably put towards the end of the dictionary. Using a
|
||||
dictionary is most useful when the data to be compressed is short and can be
|
||||
predicted with good accuracy ; the data can then be compressed better than
|
||||
with the default empty dictionary.<p>
|
||||
|
||||
Depending on the size of the compression data structures selected by
|
||||
<a href="#deflateInit">deflateInit</a> or <a href="#deflateInit2">deflateInit2</a>, a part of the dictionary may in effect be
|
||||
discarded, for example if the dictionary is larger than the window size in
|
||||
<a href="#deflate">deflate</a> or deflate2. Thus the strings most likely to be useful should be
|
||||
put at the end of the dictionary, not at the front.<p>
|
||||
|
||||
Upon return of this function, strm-> <a href="#adler">adler</a> is set to the Adler32 value
|
||||
of the dictionary ; the decompressor may later use this value to determine
|
||||
which dictionary has been used by the compressor. (The Adler32 value
|
||||
applies to the whole dictionary even if only a subset of the dictionary is
|
||||
actually used by the compressor.)<p>
|
||||
|
||||
<a href="#deflateSetDictionary">deflateSetDictionary</a> returns <a href="#Z_OK">Z_OK</a> if success, or <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if a
|
||||
parameter is invalid (such as NULL dictionary) or the stream <a href="#state">state</a> is
|
||||
inconsistent (for example if <a href="#deflate">deflate</a> has already been called for this stream
|
||||
or if the compression method is bsort). <a href="#deflateSetDictionary">deflateSetDictionary</a> does not
|
||||
perform any compression: this will be done by <a href="#deflate">deflate</a>().<p>
|
||||
|
||||
<font color="Blue"><dt> int <a name="deflateCopy">deflateCopy</a> (<a href="#z_streamp">z_streamp</a> dest, <a href="#z_streamp">z_streamp</a> source);</font>
|
||||
<dd>
|
||||
Sets the destination stream as a complete copy of the source stream.<p>
|
||||
|
||||
This function can be useful when several compression strategies will be
|
||||
tried, for example when there are several ways of pre-processing the input
|
||||
data with a filter. The streams that will be discarded should then be freed
|
||||
by calling <a href="#deflateEnd">deflateEnd</a>. Note that <a href="#deflateCopy">deflateCopy</a> duplicates the internal
|
||||
compression <a href="#state">state</a> which can be quite large, so this strategy is slow and
|
||||
can consume lots of memory.<p>
|
||||
|
||||
<a href="#deflateCopy">deflateCopy</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not
|
||||
enough memory, <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the source stream <a href="#state">state</a> was inconsistent
|
||||
(such as <a href="#zalloc">zalloc</a> being NULL). <a href="#msg">msg</a> is left unchanged in both source and
|
||||
destination.<p>
|
||||
|
||||
<font color="Blue"><dt> int <a name="deflateReset">deflateReset</a> (<a href="#z_streamp">z_streamp</a> strm);</font>
|
||||
<dd> This function is equivalent to <a href="#deflateEnd">deflateEnd</a> followed by <a href="#deflateInit">deflateInit</a>,
|
||||
but does not free and reallocate all the internal compression <a href="#state">state</a>.
|
||||
The stream will keep the same compression level and any other attributes
|
||||
that may have been set by <a href="#deflateInit2">deflateInit2</a>.<p>
|
||||
|
||||
<a href="#deflateReset">deflateReset</a> returns <a href="#Z_OK">Z_OK</a> if success, or <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the source
|
||||
stream <a href="#state">state</a> was inconsistent (such as <a href="#zalloc">zalloc</a> or <a href="#state">state</a> being NULL).<p>
|
||||
|
||||
<font color="Blue"><dt> int <a name="deflateParams">deflateParams</a> (<a href="#z_streamp">z_streamp</a> strm, int level, int strategy);</font>
|
||||
<dd>
|
||||
Dynamically update the compression level and compression strategy. The
|
||||
interpretation of level and strategy is as in <a href="#deflateInit2">deflateInit2</a>. This can be
|
||||
used to switch between compression and straight copy of the input data, or
|
||||
to switch to a different kind of input data requiring a different
|
||||
strategy. If the compression level is changed, the input available so far
|
||||
is compressed with the old level (and may be flushed); the new level will
|
||||
take effect only at the next call of <a href="#deflate">deflate</a>().<p>
|
||||
|
||||
Before the call of <a href="#deflateParams">deflateParams</a>, the stream <a href="#state">state</a> must be set as for
|
||||
a call of <a href="#deflate">deflate</a>(), since the currently available input may have to
|
||||
be compressed and flushed. In particular, strm-> <a href="#avail_out">avail_out</a> must be
|
||||
non-zero.<p>
|
||||
|
||||
<a href="#deflateParams">deflateParams</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the source
|
||||
stream <a href="#state">state</a> was inconsistent or if a parameter was invalid, <a href="#Z_BUF_ERROR">Z_BUF_ERROR</a>
|
||||
if strm->avail_out was zero.<p>
|
||||
|
||||
<font color="Blue"><dt> int <a name="inflateInit2">inflateInit2</a> (<a href="#z_streamp">z_streamp</a> strm, int windowBits);</font>
|
||||
|
||||
<dd> This is another version of <a href="#inflateInit">inflateInit</a> with an extra parameter. The
|
||||
fields <a href="#next_in">next_in</a>, <a href="#avail_in">avail_in</a>, <a href="#zalloc">zalloc</a>, <a href="#zfree">zfree</a> and <a href="#opaque">opaque</a> must be initialized
|
||||
before by the caller.<p>
|
||||
|
||||
The windowBits parameter is the base two logarithm of the maximum window
|
||||
size (the size of the history buffer). It should be in the range 8..15 for
|
||||
this version of the library. The default value is 15 if <a href="#inflateInit">inflateInit</a> is used
|
||||
instead. If a compressed stream with a larger window size is given as
|
||||
input, <a href="#inflate">inflate</a>() will return with the error code <a href="#Z_DATA_ERROR">Z_DATA_ERROR</a> instead of
|
||||
trying to allocate a larger window.<p>
|
||||
|
||||
<a href="#inflateInit2">inflateInit2</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not enough
|
||||
memory, <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if a parameter is invalid (such as a negative
|
||||
memLevel). <a href="#msg">msg</a> is set to null if there is no error message. <a href="#inflateInit2">inflateInit2</a>
|
||||
does not perform any decompression apart from reading the zlib header if
|
||||
present: this will be done by <a href="#inflate">inflate</a>(). (So <a href="#next_in">next_in</a> and <a href="#avail_in">avail_in</a> may be
|
||||
modified, but <a href="#next_out">next_out</a> and <a href="#avail_out">avail_out</a> are unchanged.)<p>
|
||||
|
||||
<font color="Blue"><dt> int <a name="inflateSetDictionary">inflateSetDictionary</a> (<a href="#z_streamp">z_streamp</a> strm, const Bytef *dictionary, uInt dictLength);</font>
|
||||
<dd>
|
||||
Initializes the decompression dictionary from the given uncompressed byte
|
||||
sequence. This function must be called immediately after a call of <a href="#inflate">inflate</a>
|
||||
if this call returned <a href="#Z_NEED_DICT">Z_NEED_DICT</a>. The dictionary chosen by the compressor
|
||||
can be determined from the Adler32 value returned by this call of
|
||||
<a href="#inflate">inflate</a>. The compressor and decompressor must use exactly the same
|
||||
dictionary (see <a href="#deflateSetDictionary">deflateSetDictionary</a>).<p>
|
||||
|
||||
<a href="#inflateSetDictionary">inflateSetDictionary</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if a
|
||||
parameter is invalid (such as NULL dictionary) or the stream <a href="#state">state</a> is
|
||||
inconsistent, <a href="#Z_DATA_ERROR">Z_DATA_ERROR</a> if the given dictionary doesn't match the
|
||||
expected one (incorrect Adler32 value). <a href="#inflateSetDictionary">inflateSetDictionary</a> does not
|
||||
perform any decompression: this will be done by subsequent calls of
|
||||
<a href="#inflate">inflate</a>().<p>
|
||||
|
||||
<font color="Blue"><dt> int <a name="inflateSync">inflateSync</a> (<a href="#z_streamp">z_streamp</a> strm);</font>
|
||||
|
||||
<dd> Skips invalid compressed data until a full flush point (see above the
|
||||
description of <a href="#deflate">deflate</a> with <a href="#Z_FULL_FLUSH">Z_FULL_FLUSH</a>) can be found, or until all
|
||||
available input is skipped. No output is provided.<p>
|
||||
|
||||
<a href="#inflateSync">inflateSync</a> returns <a href="#Z_OK">Z_OK</a> if a full flush point has been found, <a href="#Z_BUF_ERROR">Z_BUF_ERROR</a>
|
||||
if no more input was provided, <a href="#Z_DATA_ERROR">Z_DATA_ERROR</a> if no flush point has been found,
|
||||
or <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the stream structure was inconsistent. In the success
|
||||
case, the application may save the current current value of <a href="#total_in">total_in</a> which
|
||||
indicates where valid compressed data was found. In the error case, the
|
||||
application may repeatedly call <a href="#inflateSync">inflateSync</a>, providing more input each time,
|
||||
until success or end of the input data.<p>
|
||||
|
||||
<font color="Blue"><dt> int <a name="inflateReset">inflateReset</a> (<a href="#z_streamp">z_streamp</a> strm);</font>
|
||||
<dd>
|
||||
This function is equivalent to <a href="#inflateEnd">inflateEnd</a> followed by <a href="#inflateInit">inflateInit</a>,
|
||||
but does not free and reallocate all the internal decompression <a href="#state">state</a>.
|
||||
The stream will keep attributes that may have been set by <a href="#inflateInit2">inflateInit2</a>.
|
||||
<p>
|
||||
|
||||
<a href="#inflateReset">inflateReset</a> returns <a href="#Z_OK">Z_OK</a> if success, or <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the source
|
||||
stream <a href="#state">state</a> was inconsistent (such as <a href="#zalloc">zalloc</a> or <a href="#state">state</a> being NULL).
|
||||
<p>
|
||||
</dl>
|
||||
|
||||
<hr>
|
||||
<a name="Checksum functions"><h2> Checksum functions </h2>
|
||||
These functions are not related to compression but are exported
|
||||
anyway because they might be useful in applications using the
|
||||
compression library.
|
||||
<h3> Function list </h3>
|
||||
<ul>
|
||||
<li> uLong <a href="#adler32">adler32</a> (uLong <a href="#adler">adler</a>, const Bytef *buf, uInt len);
|
||||
<li> uLong <a href="#crc32">crc32</a> (uLong crc, const Bytef *buf, uInt len);
|
||||
</ul>
|
||||
<h3> Function description </h3>
|
||||
<dl>
|
||||
<font color="Blue"><dt> uLong <a name="adler32">adler32</a> (uLong <a href="#adler">adler</a>, const Bytef *buf, uInt len);</font>
|
||||
<dd>
|
||||
Update a running Adler-32 checksum with the bytes buf[0..len-1] and
|
||||
return the updated checksum. If buf is NULL, this function returns
|
||||
the required initial value for the checksum.
|
||||
<p>
|
||||
An Adler-32 checksum is almost as reliable as a CRC32 but can be computed
|
||||
much faster. Usage example:
|
||||
<pre>
|
||||
|
||||
uLong <a href="#adler">adler</a> = <a href="#adler32">adler32</a>(0L, <a href="#Z_NULL">Z_NULL</a>, 0);
|
||||
|
||||
while (read_buffer(buffer, length) != EOF) {
|
||||
<a href="#adler">adler</a> = <a href="#adler32">adler32</a>(<a href="#adler">adler</a>, buffer, length);
|
||||
}
|
||||
if (<a href="#adler">adler</a> != original_adler) error();
|
||||
</pre>
|
||||
|
||||
<font color="Blue"><dt> uLong <a name="crc32">crc32</a> (uLong crc, const Bytef *buf, uInt len);</font>
|
||||
<dd>
|
||||
Update a running crc with the bytes buf[0..len-1] and return the updated
|
||||
crc. If buf is NULL, this function returns the required initial value
|
||||
for the crc. Pre- and post-conditioning (one's complement) is performed
|
||||
within this function so it shouldn't be done by the application.
|
||||
Usage example:
|
||||
<pre>
|
||||
|
||||
uLong crc = <a href="#crc32">crc32</a>(0L, <a href="#Z_NULL">Z_NULL</a>, 0);
|
||||
|
||||
while (read_buffer(buffer, length) != EOF) {
|
||||
crc = <a href="#crc32">crc32</a>(crc, buffer, length);
|
||||
}
|
||||
if (crc != original_crc) error();
|
||||
</pre>
|
||||
</dl>
|
||||
<hr>
|
||||
<a name="struct z_stream_s"><h2> struct z_stream_s </h2>
|
||||
<font color="Blue">
|
||||
<a name="z_stream_s">
|
||||
<pre>
|
||||
typedef struct z_stream_s {
|
||||
Bytef *<a name="next_in">next_in</a>; /* next input byte */
|
||||
uInt <a name="avail_in">avail_in</a>; /* number of bytes available at <a href="#next_in">next_in</a> */
|
||||
uLong <a name="total_in">total_in</a>; /* total nb of input bytes read so far */
|
||||
|
||||
Bytef *<a name="next_out">next_out</a>; /* next output byte should be put there */
|
||||
uInt <a name="avail_out">avail_out</a>; /* remaining free space at <a href="#next_out">next_out</a> */
|
||||
uLong <a name="total_out">total_out</a>; /* total nb of bytes output so far */
|
||||
|
||||
char *<a name="msg">msg</a>; /* last error message, NULL if no error */
|
||||
struct internal_state FAR *<a name="state">state</a>; /* not visible by applications */
|
||||
|
||||
alloc_func <a name="zalloc">zalloc</a>; /* used to allocate the internal <a href="#state">state</a> */
|
||||
free_func <a name="zfree">zfree</a>; /* used to free the internal <a href="#state">state</a> */
|
||||
voidpf <a name="opaque">opaque</a>; /* private data object passed to <a href="#zalloc">zalloc</a> and <a href="#zfree">zfree</a> */
|
||||
|
||||
int <a name="data_type">data_type</a>; /* best guess about the data type: ascii or binary */
|
||||
uLong <a name="adler">adler</a>; /* <a href="#adler32">adler32</a> value of the uncompressed data */
|
||||
uLong <a name="reserved">reserved</a>; /* <a href="#reserved">reserved</a> for future use */
|
||||
} <a href="#z_stream_s">z_stream</a> ;
|
||||
|
||||
typedef <a href="#z_stream_s">z_stream</a> FAR * <a name="z_streamp">z_streamp</a>; ÿ
|
||||
</pre>
|
||||
</font>
|
||||
The application must update <a href="#next_in">next_in</a> and <a href="#avail_in">avail_in</a> when <a href="#avail_in">avail_in</a> has
|
||||
dropped to zero. It must update <a href="#next_out">next_out</a> and <a href="#avail_out">avail_out</a> when <a href="#avail_out">avail_out</a>
|
||||
has dropped to zero. The application must initialize <a href="#zalloc">zalloc</a>, <a href="#zfree">zfree</a> and
|
||||
<a href="#opaque">opaque</a> before calling the init function. All other fields are set by the
|
||||
compression library and must not be updated by the application. <p>
|
||||
|
||||
The <a href="#opaque">opaque</a> value provided by the application will be passed as the first
|
||||
parameter for calls of <a href="#zalloc">zalloc</a> and <a href="#zfree">zfree</a>. This can be useful for custom
|
||||
memory management. The compression library attaches no meaning to the
|
||||
<a href="#opaque">opaque</a> value. <p>
|
||||
|
||||
<a href="#zalloc">zalloc</a> must return <a href="#Z_NULL">Z_NULL</a> if there is not enough memory for the object.
|
||||
If zlib is used in a multi-threaded application, <a href="#zalloc">zalloc</a> and <a href="#zfree">zfree</a> must be
|
||||
thread safe. <p>
|
||||
|
||||
On 16-bit systems, the functions <a href="#zalloc">zalloc</a> and <a href="#zfree">zfree</a> must be able to allocate
|
||||
exactly 65536 bytes, but will not be required to allocate more than this
|
||||
if the symbol MAXSEG_64K is defined (see zconf.h). WARNING: On MSDOS,
|
||||
pointers returned by <a href="#zalloc">zalloc</a> for objects of exactly 65536 bytes *must*
|
||||
have their offset normalized to zero. The default allocation function
|
||||
provided by this library ensures this (see zutil.c). To reduce memory
|
||||
requirements and avoid any allocation of 64K objects, at the expense of
|
||||
compression ratio, compile the library with -DMAX_WBITS=14 (see zconf.h).
|
||||
<p>
|
||||
|
||||
The fields <a href="#total_in">total_in</a> and <a href="#total_out">total_out</a> can be used for statistics or
|
||||
progress reports. After compression, <a href="#total_in">total_in</a> holds the total size of
|
||||
the uncompressed data and may be saved for use in the decompressor
|
||||
(particularly if the decompressor wants to decompress everything in
|
||||
a single step). <p>
|
||||
|
||||
<hr>
|
||||
<a name="Constants"><h2> Constants </h2>
|
||||
<font color="Blue">
|
||||
<pre>
|
||||
#define <a name="Z_NO_FLUSH">Z_NO_FLUSH</a> 0
|
||||
#define <a name="Z_PARTIAL_FLUSH">Z_PARTIAL_FLUSH</a> 1
|
||||
/* will be removed, use <a href="#Z_SYNC_FLUSH">Z_SYNC_FLUSH</a> instead */
|
||||
#define <a name="Z_SYNC_FLUSH">Z_SYNC_FLUSH</a> 2
|
||||
#define <a name="Z_FULL_FLUSH">Z_FULL_FLUSH</a> 3
|
||||
#define <a name="Z_FINISH">Z_FINISH</a> 4
|
||||
/* Allowed flush values ; see <a href="#deflate">deflate</a>() below for details */
|
||||
|
||||
#define <a name="Z_OK">Z_OK</a> 0
|
||||
#define <a name="Z_STREAM_END">Z_STREAM_END</a> 1
|
||||
#define <a name="Z_NEED_DICT">Z_NEED_DICT</a> 2
|
||||
#define <a name="Z_ERRNO">Z_ERRNO</a> (-1)
|
||||
#define <a name="Z_STREAM_ERROR">Z_STREAM_ERROR</a> (-2)
|
||||
#define <a name="Z_DATA_ERROR">Z_DATA_ERROR</a> (-3)
|
||||
#define <a name="Z_MEM_ERROR">Z_MEM_ERROR</a> (-4)
|
||||
#define <a name="Z_BUF_ERROR">Z_BUF_ERROR</a> (-5)
|
||||
#define <a name="Z_VERSION_ERROR">Z_VERSION_ERROR</a> (-6)
|
||||
/* Return codes for the compression/decompression functions. Negative
|
||||
* values are errors, positive values are used for special but normal events.
|
||||
*/
|
||||
|
||||
#define <a name="Z_NO_COMPRESSION">Z_NO_COMPRESSION</a> 0
|
||||
#define <a name="Z_BEST_SPEED">Z_BEST_SPEED</a> 1
|
||||
#define <a name="Z_BEST_COMPRESSION">Z_BEST_COMPRESSION</a> 9
|
||||
#define <a name="Z_DEFAULT_COMPRESSION">Z_DEFAULT_COMPRESSION</a> (-1)
|
||||
/* compression levels */
|
||||
|
||||
#define <a name="Z_FILTERED">Z_FILTERED</a> 1
|
||||
#define <a name="Z_HUFFMAN_ONLY">Z_HUFFMAN_ONLY</a> 2
|
||||
#define <a name="Z_DEFAULT_STRATEGY">Z_DEFAULT_STRATEGY</a> 0
|
||||
/* compression strategy ; see <a href="#deflateInit2">deflateInit2</a>() below for details */
|
||||
|
||||
#define <a name="Z_BINARY">Z_BINARY</a> 0
|
||||
#define <a name="Z_ASCII">Z_ASCII</a> 1
|
||||
#define <a name="Z_UNKNOWN">Z_UNKNOWN</a> 2
|
||||
/* Possible values of the <a href="#data_type">data_type</a> field */
|
||||
|
||||
#define <a name="Z_DEFLATED">Z_DEFLATED</a> 8
|
||||
/* The <a href="#deflate">deflate</a> compression method (the only one supported in this version) */
|
||||
|
||||
#define <a name="Z_NULL">Z_NULL</a> 0 /* for initializing <a href="#zalloc">zalloc</a>, <a href="#zfree">zfree</a>, <a href="#opaque">opaque</a> */
|
||||
|
||||
#define <a name="zlib_version">zlib_version</a> <a href="#zlibVersion">zlibVersion</a>()
|
||||
/* for compatibility with versions less than 1.0.2 */
|
||||
</pre>
|
||||
</font>
|
||||
|
||||
<hr>
|
||||
<a name="Misc"><h2> Misc </h2>
|
||||
<a href="#deflateInit">deflateInit</a> and <a href="#inflateInit">inflateInit</a> are macros to allow checking the zlib version
|
||||
and the compiler's view of <a href="#z_stream_s">z_stream</a>.
|
||||
<p>
|
||||
Other functions:
|
||||
<dl>
|
||||
<font color="Blue"><dt> const char * <a name="zError">zError</a> (int err);</font>
|
||||
<font color="Blue"><dt> int <a name="inflateSyncPoint">inflateSyncPoint</a> (<a href="#z_streamp">z_streamp</a> z);</font>
|
||||
<font color="Blue"><dt> const uLongf * <a name="get_crc_table">get_crc_table</a> (void);</font>
|
||||
</dl>
|
||||
<hr>
|
||||
<font size="-1">
|
||||
Last update: Wed Oct 13 20:42:34 1999<br>
|
||||
piapi@csie.ntu.edu.tw
|
||||
</font>
|
||||
|
||||
</body>
|
||||
</html>
|
||||
@ -25,10 +25,10 @@
|
||||
<QPG:Files>
|
||||
<QPG:Add file="../zconf.h" install="/opt/include/" user="root:sys" permission="644"/>
|
||||
<QPG:Add file="../zlib.h" install="/opt/include/" user="root:sys" permission="644"/>
|
||||
<QPG:Add file="../libz.so.1.2.3.5" install="/opt/lib/" user="root:bin" permission="644"/>
|
||||
<QPG:Add file="libz.so" install="/opt/lib/" component="dev" filetype="symlink" linkto="libz.so.1.2.3.5"/>
|
||||
<QPG:Add file="libz.so.1" install="/opt/lib/" filetype="symlink" linkto="libz.so.1.2.3.5"/>
|
||||
<QPG:Add file="../libz.so.1.2.3.5" install="/opt/lib/" component="slib"/>
|
||||
<QPG:Add file="../libz.so.1.2.3.6" install="/opt/lib/" user="root:bin" permission="644"/>
|
||||
<QPG:Add file="libz.so" install="/opt/lib/" component="dev" filetype="symlink" linkto="libz.so.1.2.3.6"/>
|
||||
<QPG:Add file="libz.so.1" install="/opt/lib/" filetype="symlink" linkto="libz.so.1.2.3.6"/>
|
||||
<QPG:Add file="../libz.so.1.2.3.6" install="/opt/lib/" component="slib"/>
|
||||
</QPG:Files>
|
||||
|
||||
<QPG:PackageFilter>
|
||||
@ -63,7 +63,7 @@
|
||||
</QPM:ProductDescription>
|
||||
|
||||
<QPM:ReleaseDescription>
|
||||
<QPM:ReleaseVersion>1.2.3.5</QPM:ReleaseVersion>
|
||||
<QPM:ReleaseVersion>1.2.3.6</QPM:ReleaseVersion>
|
||||
<QPM:ReleaseUrgency>Medium</QPM:ReleaseUrgency>
|
||||
<QPM:ReleaseStability>Stable</QPM:ReleaseStability>
|
||||
<QPM:ReleaseNoteMinor></QPM:ReleaseNoteMinor>
|
||||
|
||||
@ -1,5 +1,5 @@
|
||||
/* uncompr.c -- decompress a memory buffer
|
||||
* Copyright (C) 1995-2003 Jean-loup Gailly.
|
||||
* Copyright (C) 1995-2003, 2010 Jean-loup Gailly.
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
*/
|
||||
|
||||
@ -16,8 +16,6 @@
|
||||
been saved previously by the compressor and transmitted to the decompressor
|
||||
by some mechanism outside the scope of this compression library.)
|
||||
Upon exit, destLen is the actual size of the compressed buffer.
|
||||
This function can be used to decompress a whole file at once if the
|
||||
input file is mmap'ed.
|
||||
|
||||
uncompress returns Z_OK if success, Z_MEM_ERROR if there was not
|
||||
enough memory, Z_BUF_ERROR if there was not enough room in the output
|
||||
|
||||
26
zconf.h
26
zconf.h
@ -382,19 +382,19 @@ typedef uLong FAR uLongf;
|
||||
|
||||
/* MVS linker does not support external names larger than 8 bytes */
|
||||
#if defined(__MVS__)
|
||||
# pragma map(deflateInit_,"DEIN")
|
||||
# pragma map(deflateInit2_,"DEIN2")
|
||||
# pragma map(deflateEnd,"DEEND")
|
||||
# pragma map(deflateBound,"DEBND")
|
||||
# pragma map(inflateInit_,"ININ")
|
||||
# pragma map(inflateInit2_,"ININ2")
|
||||
# pragma map(inflateEnd,"INEND")
|
||||
# pragma map(inflateSync,"INSY")
|
||||
# pragma map(inflateSetDictionary,"INSEDI")
|
||||
# pragma map(compressBound,"CMBND")
|
||||
# pragma map(inflate_table,"INTABL")
|
||||
# pragma map(inflate_fast,"INFA")
|
||||
# pragma map(inflate_copyright,"INCOPY")
|
||||
#pragma map(deflateInit_,"DEIN")
|
||||
#pragma map(deflateInit2_,"DEIN2")
|
||||
#pragma map(deflateEnd,"DEEND")
|
||||
#pragma map(deflateBound,"DEBND")
|
||||
#pragma map(inflateInit_,"ININ")
|
||||
#pragma map(inflateInit2_,"ININ2")
|
||||
#pragma map(inflateEnd,"INEND")
|
||||
#pragma map(inflateSync,"INSY")
|
||||
#pragma map(inflateSetDictionary,"INSEDI")
|
||||
#pragma map(compressBound,"CMBND")
|
||||
#pragma map(inflate_table,"INTABL")
|
||||
#pragma map(inflate_fast,"INFA")
|
||||
#pragma map(inflate_copyright,"INCOPY")
|
||||
#endif
|
||||
|
||||
#endif /* ZCONF_H */
|
||||
|
||||
7
zlib.3
7
zlib.3
@ -1,4 +1,4 @@
|
||||
.TH ZLIB 3 "8 January 2010"
|
||||
.TH ZLIB 3 "17 January 2010"
|
||||
.SH NAME
|
||||
zlib \- compression/decompression library
|
||||
.SH SYNOPSIS
|
||||
@ -17,7 +17,6 @@ but other algorithms will be added later
|
||||
and will have the same stream interface.
|
||||
.LP
|
||||
Compression can be done in a single step if the buffers are large enough
|
||||
(for example if an input file is mmap'ed),
|
||||
or can be done by repeated calls of the compression function.
|
||||
In the latter case,
|
||||
the application must provide more input and/or consume the output
|
||||
@ -133,8 +132,8 @@ before asking for help.
|
||||
Send questions and/or comments to zlib@gzip.org,
|
||||
or (for the Windows DLL version) to Gilles Vollant (info@winimage.com).
|
||||
.SH AUTHORS
|
||||
Version 1.2.3.5
|
||||
Copyright (C) 1995-2009 Jean-loup Gailly (jloup@gzip.org)
|
||||
Version 1.2.3.6
|
||||
Copyright (C) 1995-2010 Jean-loup Gailly (jloup@gzip.org)
|
||||
and Mark Adler (madler@alumni.caltech.edu).
|
||||
.LP
|
||||
This software is provided "as-is,"
|
||||
|
||||
10
zlib.map
10
zlib.map
@ -14,6 +14,8 @@ ZLIB_1.2.0 {
|
||||
zcalloc;
|
||||
zcfree;
|
||||
z_errmsg;
|
||||
gz_error;
|
||||
gzio_old;
|
||||
_*;
|
||||
};
|
||||
|
||||
@ -51,3 +53,11 @@ ZLIB_1.2.3.4 {
|
||||
inflateReset2;
|
||||
inflateMark;
|
||||
} ZLIB_1.2.3.3;
|
||||
|
||||
ZLIB_1.2.3.5 {
|
||||
gzbuffer;
|
||||
gzoffset;
|
||||
gzoffset64;
|
||||
gzclose_r;
|
||||
gzclose_w;
|
||||
} ZLIB_1.2.3.4;
|
||||
|
||||
8
zutil.c
8
zutil.c
@ -34,25 +34,25 @@ uLong ZEXPORT zlibCompileFlags()
|
||||
uLong flags;
|
||||
|
||||
flags = 0;
|
||||
switch (sizeof(uInt)) {
|
||||
switch ((int)(sizeof(uInt))) {
|
||||
case 2: break;
|
||||
case 4: flags += 1; break;
|
||||
case 8: flags += 2; break;
|
||||
default: flags += 3;
|
||||
}
|
||||
switch (sizeof(uLong)) {
|
||||
switch ((int)(sizeof(uLong))) {
|
||||
case 2: break;
|
||||
case 4: flags += 1 << 2; break;
|
||||
case 8: flags += 2 << 2; break;
|
||||
default: flags += 3 << 2;
|
||||
}
|
||||
switch (sizeof(voidpf)) {
|
||||
switch ((int)(sizeof(voidpf))) {
|
||||
case 2: break;
|
||||
case 4: flags += 1 << 4; break;
|
||||
case 8: flags += 2 << 4; break;
|
||||
default: flags += 3 << 4;
|
||||
}
|
||||
switch (sizeof(z_off_t)) {
|
||||
switch ((int)(sizeof(z_off_t))) {
|
||||
case 2: break;
|
||||
case 4: flags += 1 << 6; break;
|
||||
case 8: flags += 2 << 6; break;
|
||||
|
||||
8
zutil.h
8
zutil.h
@ -116,7 +116,7 @@ extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
|
||||
#ifdef OS2
|
||||
# define OS_CODE 0x06
|
||||
# ifdef M_I86
|
||||
#include <malloc.h>
|
||||
# include <malloc.h>
|
||||
# endif
|
||||
#endif
|
||||
|
||||
@ -162,9 +162,9 @@ extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
|
||||
#endif
|
||||
|
||||
#if defined(__BORLANDC__)
|
||||
#pragma warn -8004
|
||||
#pragma warn -8008
|
||||
#pragma warn -8066
|
||||
#pragma warn -8004
|
||||
#pragma warn -8008
|
||||
#pragma warn -8066
|
||||
#endif
|
||||
|
||||
#ifdef _LARGEFILE64_SOURCE
|
||||
|
||||
Loading…
Reference in New Issue
Block a user