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[/] [open8_urisc/] [trunk/] [gnu/] [binutils/] [gas/] [compress-debug.c] - Rev 179
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/* compress-debug.c - compress debug sections Copyright 2010 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 "ansidecl.h" #include "compress-debug.h" #ifdef HAVE_ZLIB_H #include <zlib.h> #endif /* Initialize the compression engine. */ struct z_stream_s * compress_init (void) { #ifndef HAVE_ZLIB_H return NULL; #else static struct z_stream_s strm; strm.zalloc = NULL; strm.zfree = NULL; strm.opaque = NULL; deflateInit (&strm, Z_DEFAULT_COMPRESSION); return &strm; #endif /* HAVE_ZLIB_H */ } /* 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 ATTRIBUTE_UNUSED, const char **next_in ATTRIBUTE_UNUSED, int *avail_in ATTRIBUTE_UNUSED, char **next_out ATTRIBUTE_UNUSED, int *avail_out ATTRIBUTE_UNUSED) { #ifndef HAVE_ZLIB_H return -1; #else 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; #endif /* HAVE_ZLIB_H */ } /* 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 ATTRIBUTE_UNUSED, char **next_out ATTRIBUTE_UNUSED, int *avail_out ATTRIBUTE_UNUSED, int *out_size ATTRIBUTE_UNUSED) { #ifndef HAVE_ZLIB_H return -1; #else 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; #endif /* HAVE_ZLIB_H */ }
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