1 /* compress-debug.c - compress debug sections
2 Copyright (C) 2010-2019 Free Software Foundation, Inc.
4 This file is part of GAS, the GNU Assembler.
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)
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.
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
25 #include "compress-debug.h"
27 /* Initialize the compression engine. */
32 static struct z_stream_s strm
;
37 deflateInit (&strm
, Z_DEFAULT_COMPRESSION
);
41 /* Stream the contents of a frag to the compression engine. Output
42 from the engine goes into the current frag on the obstack. */
45 compress_data (struct z_stream_s
*strm
, const char **next_in
,
46 int *avail_in
, char **next_out
, int *avail_out
)
51 strm
->next_in
= (Bytef
*) (*next_in
);
52 strm
->avail_in
= *avail_in
;
53 strm
->next_out
= (Bytef
*) (*next_out
);
54 strm
->avail_out
= *avail_out
;
56 x
= deflate (strm
, Z_NO_FLUSH
);
60 out_size
= *avail_out
- strm
->avail_out
;
61 *next_in
= (char *) (strm
->next_in
);
62 *avail_in
= strm
->avail_in
;
63 *next_out
= (char *) (strm
->next_out
);
64 *avail_out
= strm
->avail_out
;
69 /* Finish the compression and consume the remaining compressed output.
70 Returns -1 for error, 0 when done, 1 when more output buffer is
74 compress_finish (struct z_stream_s
*strm
, char **next_out
,
75 int *avail_out
, int *out_size
)
80 strm
->next_out
= (Bytef
*) (*next_out
);
81 strm
->avail_out
= *avail_out
;
83 x
= deflate (strm
, Z_FINISH
);
85 *out_size
= *avail_out
- strm
->avail_out
;
86 *next_out
= (char *) (strm
->next_out
);
87 *avail_out
= strm
->avail_out
;
89 if (x
== Z_STREAM_END
)
94 if (strm
->avail_out
!= 0)
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