mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-21 04:42:53 +08:00
98 lines
2.5 KiB
C
98 lines
2.5 KiB
C
/* compress-debug.c - compress debug sections
|
|
Copyright (C) 2010-2017 Free Software Foundation, Inc.
|
|
|
|
This file is part of GAS, the GNU Assembler.
|
|
|
|
GAS is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3, or (at your option)
|
|
any later version.
|
|
|
|
GAS is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with GAS; see the file COPYING. If not, write to the Free
|
|
Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
|
|
02110-1301, USA. */
|
|
|
|
#include "config.h"
|
|
#include <stdio.h>
|
|
#include <zlib.h>
|
|
#include "ansidecl.h"
|
|
#include "compress-debug.h"
|
|
|
|
/* Initialize the compression engine. */
|
|
|
|
struct z_stream_s *
|
|
compress_init (void)
|
|
{
|
|
static struct z_stream_s strm;
|
|
|
|
strm.zalloc = NULL;
|
|
strm.zfree = NULL;
|
|
strm.opaque = NULL;
|
|
deflateInit (&strm, Z_DEFAULT_COMPRESSION);
|
|
return &strm;
|
|
}
|
|
|
|
/* Stream the contents of a frag to the compression engine. Output
|
|
from the engine goes into the current frag on the obstack. */
|
|
|
|
int
|
|
compress_data (struct z_stream_s *strm, const char **next_in,
|
|
int *avail_in, char **next_out, int *avail_out)
|
|
{
|
|
int out_size = 0;
|
|
int x;
|
|
|
|
strm->next_in = (Bytef *) (*next_in);
|
|
strm->avail_in = *avail_in;
|
|
strm->next_out = (Bytef *) (*next_out);
|
|
strm->avail_out = *avail_out;
|
|
|
|
x = deflate (strm, Z_NO_FLUSH);
|
|
if (x != Z_OK)
|
|
return -1;
|
|
|
|
out_size = *avail_out - strm->avail_out;
|
|
*next_in = (char *) (strm->next_in);
|
|
*avail_in = strm->avail_in;
|
|
*next_out = (char *) (strm->next_out);
|
|
*avail_out = strm->avail_out;
|
|
|
|
return out_size;
|
|
}
|
|
|
|
/* Finish the compression and consume the remaining compressed output.
|
|
Returns -1 for error, 0 when done, 1 when more output buffer is
|
|
needed. */
|
|
|
|
int
|
|
compress_finish (struct z_stream_s *strm, char **next_out,
|
|
int *avail_out, int *out_size)
|
|
{
|
|
int x;
|
|
|
|
strm->avail_in = 0;
|
|
strm->next_out = (Bytef *) (*next_out);
|
|
strm->avail_out = *avail_out;
|
|
|
|
x = deflate (strm, Z_FINISH);
|
|
|
|
*out_size = *avail_out - strm->avail_out;
|
|
*next_out = (char *) (strm->next_out);
|
|
*avail_out = strm->avail_out;
|
|
|
|
if (x == Z_STREAM_END)
|
|
{
|
|
deflateEnd (strm);
|
|
return 0;
|
|
}
|
|
if (strm->avail_out != 0)
|
|
return -1;
|
|
return 1;
|
|
}
|