Go to most recent revision | Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 5222 | serge | 1 | /* compress-debug.c - compress debug sections |
| 2 | Copyright 2010 Free Software Foundation, Inc. |
||
| 3 | |||
| 4 | This file is part of GAS, the GNU Assembler. |
||
| 5 | |||
| 6 | GAS is free software; you can redistribute it and/or modify |
||
| 7 | it under the terms of the GNU General Public License as published by |
||
| 8 | the Free Software Foundation; either version 3, or (at your option) |
||
| 9 | any later version. |
||
| 10 | |||
| 11 | GAS is distributed in the hope that it will be useful, |
||
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
||
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
||
| 14 | GNU General Public License for more details. |
||
| 15 | |||
| 16 | You should have received a copy of the GNU General Public License |
||
| 17 | along with GAS; see the file COPYING. If not, write to the Free |
||
| 18 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
||
| 19 | 02110-1301, USA. */ |
||
| 20 | |||
| 21 | #include "config.h" |
||
| 22 | #include |
||
| 23 | #include "ansidecl.h" |
||
| 24 | #include "compress-debug.h" |
||
| 25 | |||
| 26 | #ifdef HAVE_ZLIB_H |
||
| 27 | #include |
||
| 28 | #endif |
||
| 29 | |||
| 30 | /* Initialize the compression engine. */ |
||
| 31 | |||
| 32 | struct z_stream_s * |
||
| 33 | compress_init (void) |
||
| 34 | { |
||
| 35 | #ifndef HAVE_ZLIB_H |
||
| 36 | return NULL; |
||
| 37 | #else |
||
| 38 | static struct z_stream_s strm; |
||
| 39 | |||
| 40 | strm.zalloc = NULL; |
||
| 41 | strm.zfree = NULL; |
||
| 42 | strm.opaque = NULL; |
||
| 43 | deflateInit (&strm, Z_DEFAULT_COMPRESSION); |
||
| 44 | return &strm; |
||
| 45 | #endif /* HAVE_ZLIB_H */ |
||
| 46 | } |
||
| 47 | |||
| 48 | /* Stream the contents of a frag to the compression engine. Output |
||
| 49 | from the engine goes into the current frag on the obstack. */ |
||
| 50 | |||
| 51 | int |
||
| 52 | compress_data (struct z_stream_s *strm ATTRIBUTE_UNUSED, |
||
| 53 | const char **next_in ATTRIBUTE_UNUSED, |
||
| 54 | int *avail_in ATTRIBUTE_UNUSED, |
||
| 55 | char **next_out ATTRIBUTE_UNUSED, |
||
| 56 | int *avail_out ATTRIBUTE_UNUSED) |
||
| 57 | { |
||
| 58 | #ifndef HAVE_ZLIB_H |
||
| 59 | return -1; |
||
| 60 | #else |
||
| 61 | int out_size = 0; |
||
| 62 | int x; |
||
| 63 | |||
| 64 | strm->next_in = (Bytef *) (*next_in); |
||
| 65 | strm->avail_in = *avail_in; |
||
| 66 | strm->next_out = (Bytef *) (*next_out); |
||
| 67 | strm->avail_out = *avail_out; |
||
| 68 | |||
| 69 | x = deflate (strm, Z_NO_FLUSH); |
||
| 70 | if (x != Z_OK) |
||
| 71 | return -1; |
||
| 72 | |||
| 73 | out_size = *avail_out - strm->avail_out; |
||
| 74 | *next_in = (char *) (strm->next_in); |
||
| 75 | *avail_in = strm->avail_in; |
||
| 76 | *next_out = (char *) (strm->next_out); |
||
| 77 | *avail_out = strm->avail_out; |
||
| 78 | |||
| 79 | return out_size; |
||
| 80 | #endif /* HAVE_ZLIB_H */ |
||
| 81 | } |
||
| 82 | |||
| 83 | /* Finish the compression and consume the remaining compressed output. |
||
| 84 | Returns -1 for error, 0 when done, 1 when more output buffer is |
||
| 85 | needed. */ |
||
| 86 | |||
| 87 | int |
||
| 88 | compress_finish (struct z_stream_s *strm ATTRIBUTE_UNUSED, |
||
| 89 | char **next_out ATTRIBUTE_UNUSED, |
||
| 90 | int *avail_out ATTRIBUTE_UNUSED, |
||
| 91 | int *out_size ATTRIBUTE_UNUSED) |
||
| 92 | { |
||
| 93 | #ifndef HAVE_ZLIB_H |
||
| 94 | return -1; |
||
| 95 | #else |
||
| 96 | int x; |
||
| 97 | |||
| 98 | strm->avail_in = 0; |
||
| 99 | strm->next_out = (Bytef *) (*next_out); |
||
| 100 | strm->avail_out = *avail_out; |
||
| 101 | |||
| 102 | x = deflate (strm, Z_FINISH); |
||
| 103 | |||
| 104 | *out_size = *avail_out - strm->avail_out; |
||
| 105 | *next_out = (char *) (strm->next_out); |
||
| 106 | *avail_out = strm->avail_out; |
||
| 107 | |||
| 108 | if (x == Z_STREAM_END) |
||
| 109 | { |
||
| 110 | deflateEnd (strm); |
||
| 111 | return 0; |
||
| 112 | } |
||
| 113 | if (strm->avail_out != 0) |
||
| 114 | return -1; |
||
| 115 | return 1; |
||
| 116 | #endif /* HAVE_ZLIB_H */ |
||
| 117 | } |