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| -rw-r--r-- | gas/compress-debug.c | 119 | ||||
| -rw-r--r-- | gas/compress-debug.h | 39 |
2 files changed, 158 insertions, 0 deletions
diff --git a/gas/compress-debug.c b/gas/compress-debug.c new file mode 100644 index 0000000..c2a8d3d --- /dev/null +++ b/gas/compress-debug.c @@ -0,0 +1,119 @@ +/* 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 <stdio.h> + +#include "ansidecl.h" + +#include "config.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 */ +} diff --git a/gas/compress-debug.h b/gas/compress-debug.h new file mode 100644 index 0000000..9d821e9 --- /dev/null +++ b/gas/compress-debug.h @@ -0,0 +1,39 @@ +/* compress-debug.h - Header file for compressed 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. */ + +#ifndef COMPRESS_DEBUG_H +#define COMPRESS_DEBUG_H + +struct z_stream_s; + +/* Initialize the compression engine. */ +extern struct z_stream_s * +compress_init (void); + +/* Stream the contents of a frag to the compression engine. Output + from the engine goes into the current frag on the obstack. */ +extern int +compress_data (struct z_stream_s *, const char **, int *, char **, int *); + +/* Finish the compression and consume the remaining compressed output. */ +extern int +compress_finish (struct z_stream_s *, char **, int *, int *); + +#endif /* COMPRESS_DEBUG_H */ |