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154 lines
6.6 KiB
C
154 lines
6.6 KiB
C
#ifndef __MCBINIII_H__
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#define __MCBINIII_H__
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/****************************************************************
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MacBinaryIII.h
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Copyright 1997 Christopher Evans (cevans@poppybank.com)
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Basic encoding and decoding of Macintosh files to the
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MacBinary III spec.
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****************************************************************/
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/*
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--------------------------------------------------------------------
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This source is copyrighted by Christopher Evans (cevans@poppybank.com)
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(available at ftp://ftp.lazerware.com/MacBinaryIII_src_C.sit
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homepage of Leonard Rosenthol leonardr@netcom.com)
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I made the following changes:
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* renamed files MacBinaryIII.h / MacBinaryIII.c to
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macbin3.c / macbin3.h
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* removed pragmas:
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#pragma once
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#pragma options align=mac68k
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* added 5 macros to make the migration into other projects easier:
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DELETE_MACBINARY_SOURCE -> delete the macbinary file after
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decoding
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INCLUDE_ENCODE_MACBINARY -> include the encode-part of the source
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INCLUDE_DECODE_MACBINARY -> include the decode-part of the source
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INCLUDE_CRC32CALC -> include the CRC32 calculation
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TRACE_MACBINARY -> produce some diagnostic printouts
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* changed the source layout to fit into a 80 col window
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* removed non-ASCII characters from the sources
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* renamed the function CalculateCRC() to crc32() and changed
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the order of the arguments. So the crc32() func of the InfoZip
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package can be used instead.
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* moved module specific macros and protos to the mcbiniii.c
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* added comments and enhanced the documention of the MacBinary Spec
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* changed definition crc_table[] from short to unsigned long.
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* improved the HeaderIsMacBinary() function to be more restrictive
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The specification says:
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"Offsets 83 and 87, Long Word, (the length of the forks)
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should be in the range of 0-$007FFFFF "
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However, I do not understand the reason of this range. The data fork
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can be much larger than $007FFFFF ( 2 Gigabytes! ) and the size of the
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resource fork can be until 16 MByte. ZipIt and Stuffit seems to be
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ignore this limit.
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I changed this limit (see kResourceForkMaxLen), and I removed the
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maximum check of the data fork.
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Dirk Haase (d_haase@sitec.de); 05.Dec.1998
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--------------------------------------------------------------------
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MacBinary III
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MacBinary is a standard format for binary transfer of arbitrary Macintosh
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documents via a telecommunication link. It is intended for use both between
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Macintoshes and for use in uploading arbitrary Macintosh documents to remote
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systems (where it is presumed that they will be stored as an exact image of
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the data transmitted). It does this by combing both the resource and data
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forks (as well as the "Finder Info") of a standard Macintosh file into a
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single data fork only file that can be stored on non-Macintosh machines.
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The format of the header for MacBinary III is as follows:
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Offset Length Contents
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000 Byte old version number, must be kept at zero for
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compatibility
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001 Byte Length of filename (must be in the range 1-31)
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002 1 to 63 Bytes filename (only "length" bytes are significant).
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065 Long Word file type (normally expressed as four characters)
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069 Long Word file creator (normally expressed as four
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characters)
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073 Byte original Finder flags
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Bit 7 - isAlias.
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Bit 6 - isInvisible.
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Bit 5 - hasBundle.
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Bit 4 - nameLocked.
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Bit 3 - isStationery.
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Bit 2 - hasCustomIcon.
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Bit 1 - reserved.
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Bit 0 - hasBeenInited.
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074 Byte zero fill, must be zero for compatibility
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075 Word file's vertical position within its window.
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077 Word file's horizontal position within its window.
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079 Word file's window or folder ID.
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081 Byte "Protected" flag (in low order bit).
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082 Byte zero fill, must be zero for compatibility
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083 Long Word Data Fork length (bytes, zero if no Data Fork).
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087 Long Word Resource Fork length (bytes, zero if no R.F.).
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091 Long Word File's creation date
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095 Long Word File's "last modified" date.
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099 Word length of Get Info comment to be sent after the
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resource fork (if implemented, see below).
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101 Byte Finder Flags, bits 0-7. (Bits 8-15 are already in
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byte 73)
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Bit 7 - hasNoInits
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Bit 6 - isShared
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Bit 5 - requiresSwitchLaunch
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Bit 4 - ColorReserved
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Bits 1-3 - color
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Bit 0 - isOnDesk
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*102 Long Word signature for indentification purposes ('mBIN')
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*106 Byte script of file name (from the fdScript field of an
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fxInfo record)
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*107 Byte extended Finder flags (from the fdXFlags field of
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an fxInfo record)
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108-115 Unused (must be zeroed by creators, must be
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ignored by readers)
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116 Long Word Length of total files when packed files are
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unpacked. As of the writing of this document, this
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field has never been used.
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120 Word Length of a secondary header. If this is non-zero,
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skip this many bytes (rounded up to the next
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multiple of 128). This is for future expansion
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only, when sending files with MacBinary, this word
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should be zero.
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*122 Byte Version number of MacBinary III that the uploading
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program is written for (the version is 130 for
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MacBinary III)
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123 Byte Minimum MacBinary version needed to read this file
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(set this value at 129 for backwards compatibility
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with MacBinary II)
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124 Word CRC of previous 124 bytes
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*These fields have changed for MacBinary III.
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All values are stored in normal 68000 order, with Most Significant Byte
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appearing first then the file. Any bytes in the header not defined above
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should be set to zero.
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*/
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/*
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Public functions
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*/
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OSErr EncodeMacbinaryFile(FSSpec *file);
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OSErr DecodeMacBinaryFile(FSSpec *source);
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Boolean FSpIsMacBinary(FSSpec *file);
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#endif
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