1 /* compress-debug.c - compress debug sections
2 Copyright (C) 2010-2022 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
28 #include "compress-debug.h"
30 /* Initialize the compression engine. */
33 compress_init (bool use_zstd)
37 return ZSTD_createCCtx ();
41 static struct z_stream_s strm;
46 deflateInit (&strm, Z_DEFAULT_COMPRESSION);
50 /* Stream the contents of a frag to the compression engine. Output
51 from the engine goes into the current frag on the obstack. */
54 compress_data (bool use_zstd, void *ctx, const char **next_in, int *avail_in,
55 char **next_out, int *avail_out)
60 ZSTD_outBuffer ob = { *next_out, *avail_out, 0 };
61 ZSTD_inBuffer ib = { *next_in, *avail_in, 0 };
62 size_t ret = ZSTD_compressStream2 (ctx, &ob, &ib, ZSTD_e_continue);
67 if (ZSTD_isError (ret))
73 struct z_stream_s *strm = ctx;
75 strm->next_in = (Bytef *) (*next_in);
76 strm->avail_in = *avail_in;
77 strm->next_out = (Bytef *) (*next_out);
78 strm->avail_out = *avail_out;
80 int x = deflate (strm, Z_NO_FLUSH);
84 int out_size = *avail_out - strm->avail_out;
85 *next_in = (char *) (strm->next_in);
86 *avail_in = strm->avail_in;
87 *next_out = (char *) (strm->next_out);
88 *avail_out = strm->avail_out;
93 /* Finish the compression and consume the remaining compressed output.
94 Returns -1 for error, 0 when done, 1 when more output buffer is
98 compress_finish (bool use_zstd, void *ctx, char **next_out,
99 int *avail_out, int *out_size)
104 ZSTD_outBuffer ob = { *next_out, *avail_out, 0 };
105 ZSTD_inBuffer ib = { 0 };
106 size_t ret = ZSTD_compressStream2 (ctx, &ob, &ib, ZSTD_e_end);
109 *avail_out -= ob.pos;
110 if (ZSTD_isError (ret))
119 struct z_stream_s *strm = ctx;
122 strm->next_out = (Bytef *) (*next_out);
123 strm->avail_out = *avail_out;
125 x = deflate (strm, Z_FINISH);
127 *out_size = *avail_out - strm->avail_out;
128 *next_out = (char *) (strm->next_out);
129 *avail_out = strm->avail_out;
131 if (x == Z_STREAM_END)
136 if (strm->avail_out != 0)