2011-06-21 05:19:41 +04:00
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/* Allocate memory region filled with spaces.
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Copyright (C) 1991 Free Software Foundation, Inc.
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This file is part of the libiberty library.
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Libiberty is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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Libiberty is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with libiberty; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
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Boston, MA 02110-1301, USA. */
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/*
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@deftypefn Extension char* spaces (int @var{count})
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Returns a pointer to a memory region filled with the specified
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number of spaces and null terminated. The returned pointer is
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valid until at least the next call.
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@end deftypefn
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "ansidecl.h"
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#include "libiberty.h"
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#if VMS
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#include <stdlib.h>
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#include <unixlib.h>
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#else
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/* For systems with larger pointers than ints, these must be declared. */
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extern PTR malloc (size_t);
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extern void free (PTR);
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#endif
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const char *
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spaces (int count)
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{
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register char *t;
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static char *buf;
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static int maxsize;
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if (count > maxsize)
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{
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import GCC 4.8 branch at r206687.
highlights from: http://gcc.gnu.org/gcc-4.6/changes.html
GCC now has stricter checks for invalid command-line options
New -Wunused-but-set-variable and -Wunused-but-set-parameter
warnings
Many platforms have been obsoleted
Link-time optimization improvements
A new switch -fstack-usage has been added
A new function attribute leaf was introduced
A new warning, enabled by -Wdouble-promotion
Support for selectively enabling and disabling warnings via
#pragma GCC diagnostic has been added
There is now experimental support for some features from the
upcoming C1X revision of the ISO C standard
Improved experimental support for the upcoming C++0x ISO C++
standard
G++ now issues clearer diagnostics in several cases
Updates for ARM, x86, MIPS, PPC/PPC64, SPARC
Darwin, FreeBSD, Solaris 2, MinGW and Cygwin now all support
__float128 on 32-bit and 64-bit x86 targets. [*1]
highlights from: http://gcc.gnu.org/gcc-4.7/changes.html
The -fconserve-space flag has been deprecated
Support for a new parameter --param case-values-threshold=n
was added
Interprocedural and Link-time optimization improvements
A new built-in, __builtin_assume_aligned, has been added
A new warning option -Wunused-local-typedefs was added
A new experimental command-line option -ftrack-macro-expansion
was added
Support for atomic operations specifying the C++11/C11 memory
model has been added
There is support for some more features from the C11 revision
of the ISO C standard
Improved experimental support for the new ISO C++ standard,
C++11
Updates for ARM, x86, MIPS, PPC/PPC64, SH, SPARC, TILE*
A new option (-grecord-gcc-switches) was added
highlights from: http://gcc.gnu.org/gcc-4.8/changes.html
GCC now uses C++ as its implementation language. This means
that to build GCC from sources, you will need a C++
compiler that understands C++ 2003
DWARF4 is now the default when generating DWARF debug
information
A new general optimization level, -Og, has been introduced
A new option -ftree-partial-pre was added
The option -fconserve-space has been removed
The command-line options -fipa-struct-reorg and
-fipa-matrix-reorg have been removed
Interprocedural and Link-time optimization improvements
AddressSanitizer, a fast memory error detector, has been
added [*2]
A new -Wsizeof-pointer-memaccess warning has been added
G++ now supports a -std=c++1y option for experimentation
with features proposed for the next revision of the
standard, expected around 2014
Improved experimental support for the new ISO C++ standard,
C++11
A new port has been added to support AArch64
Updates for ARM, x86, MIPS, PPC/PPC64, SH, SPARC, TILE*
[*1] we should support this too!
[*2] we should look into this.
https://code.google.com/p/address-sanitizer/
2014-03-01 12:41:18 +04:00
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free (buf);
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2011-06-21 05:19:41 +04:00
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buf = (char *) malloc (count + 1);
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if (buf == (char *) 0)
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return 0;
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for (t = buf + count ; t != buf ; )
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{
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*--t = ' ';
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}
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maxsize = count;
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buf[count] = '\0';
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}
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return (const char *) (buf + maxsize - count);
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}
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