aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--gas/compress-debug.c119
-rw-r--r--gas/compress-debug.h39
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 */