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authorTom Tromey <tromey@redhat.com>2005-09-12 17:42:53 +0000
committerTom Tromey <tromey@gcc.gnu.org>2005-09-12 17:42:53 +0000
commitef3381664e516d137c80ebbf48c085220d5810ab (patch)
treeafad186af73219e6bb1a8cb8eac61485fb4eec97 /zlib/gzio.c
parent3ec980b182de950223663d4a3ef65177fa887501 (diff)
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* Imported zlib 1.2.3; merged local changes.
From-SVN: r104184
Diffstat (limited to 'zlib/gzio.c')
-rw-r--r--zlib/gzio.c47
1 files changed, 34 insertions, 13 deletions
diff --git a/zlib/gzio.c b/zlib/gzio.c
index 4054e8c..a358774 100644
--- a/zlib/gzio.c
+++ b/zlib/gzio.c
@@ -1,5 +1,5 @@
/* gzio.c -- IO on .gz files
- * Copyright (C) 1995-2003 Jean-loup Gailly.
+ * Copyright (C) 1995-2005 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*
* Compile this file with -DNO_GZCOMPRESS to avoid the compression code.
@@ -11,7 +11,7 @@
#include "zutil.h"
-#ifdef NO_DEFLATE /* for compatiblity with old definition */
+#ifdef NO_DEFLATE /* for compatibility with old definition */
# define NO_GZCOMPRESS
#endif
@@ -220,7 +220,7 @@ gzFile ZEXPORT gzdopen (fd, mode)
int fd;
const char *mode;
{
- char name[20];
+ char name[46]; /* allow for up to 128-bit integers */
if (fd < 0) return (gzFile)Z_NULL;
sprintf(name, "<fd:%d>", fd); /* for debugging */
@@ -264,7 +264,7 @@ local int get_byte(s)
if (s->z_eof) return EOF;
if (s->stream.avail_in == 0) {
errno = 0;
- s->stream.avail_in = fread(s->inbuf, 1, Z_BUFSIZE, s->file);
+ s->stream.avail_in = (uInt)fread(s->inbuf, 1, Z_BUFSIZE, s->file);
if (s->stream.avail_in == 0) {
s->z_eof = 1;
if (ferror(s->file)) s->z_err = Z_ERRNO;
@@ -300,7 +300,7 @@ local void check_header(s)
if (len < 2) {
if (len) s->inbuf[0] = s->stream.next_in[0];
errno = 0;
- len = fread(s->inbuf + len, 1, Z_BUFSIZE >> len, s->file);
+ len = (uInt)fread(s->inbuf + len, 1, Z_BUFSIZE >> len, s->file);
if (len == 0 && ferror(s->file)) s->z_err = Z_ERRNO;
s->stream.avail_in += len;
s->stream.next_in = s->inbuf;
@@ -415,6 +415,7 @@ int ZEXPORT gzread (file, buf, len)
s->stream.avail_out--;
s->back = EOF;
s->out++;
+ start++;
if (s->last) {
s->z_err = Z_STREAM_END;
return 1;
@@ -436,8 +437,8 @@ int ZEXPORT gzread (file, buf, len)
s->stream.avail_in -= n;
}
if (s->stream.avail_out > 0) {
- s->stream.avail_out -= fread(next_out, 1, s->stream.avail_out,
- s->file);
+ s->stream.avail_out -=
+ (uInt)fread(next_out, 1, s->stream.avail_out, s->file);
}
len -= s->stream.avail_out;
s->in += len;
@@ -448,7 +449,7 @@ int ZEXPORT gzread (file, buf, len)
if (s->stream.avail_in == 0 && !s->z_eof) {
errno = 0;
- s->stream.avail_in = fread(s->inbuf, 1, Z_BUFSIZE, s->file);
+ s->stream.avail_in = (uInt)fread(s->inbuf, 1, Z_BUFSIZE, s->file);
if (s->stream.avail_in == 0) {
s->z_eof = 1;
if (ferror(s->file)) {
@@ -488,6 +489,9 @@ int ZEXPORT gzread (file, buf, len)
}
s->crc = crc32(s->crc, start, (uInt)(s->stream.next_out - start));
+ if (len == s->stream.avail_out &&
+ (s->z_err == Z_DATA_ERROR || s->z_err == Z_ERRNO))
+ return -1;
return (int)(len - s->stream.avail_out);
}
@@ -899,6 +903,18 @@ int ZEXPORT gzeof (file)
}
/* ===========================================================================
+ Returns 1 if reading and doing so transparently, otherwise zero.
+*/
+int ZEXPORT gzdirect (file)
+ gzFile file;
+{
+ gz_stream *s = (gz_stream*)file;
+
+ if (s == NULL || s->mode != 'r') return 0;
+ return s->transparent;
+}
+
+/* ===========================================================================
Outputs a long in LSB order to the given file
*/
local void putLong (file, x)
@@ -937,7 +953,6 @@ local uLong getLong (s)
int ZEXPORT gzclose (file)
gzFile file;
{
- int err;
gz_stream *s = (gz_stream*)file;
if (s == NULL) return Z_STREAM_ERROR;
@@ -946,8 +961,8 @@ int ZEXPORT gzclose (file)
#ifdef NO_GZCOMPRESS
return Z_STREAM_ERROR;
#else
- err = do_flush (file, Z_FINISH);
- if (err != Z_OK) return destroy((gz_stream*)file);
+ if (do_flush (file, Z_FINISH) != Z_OK)
+ return destroy((gz_stream*)file);
putLong (s->file, s->crc);
putLong (s->file, (uLong)(s->in & 0xffffffff));
@@ -956,10 +971,16 @@ int ZEXPORT gzclose (file)
return destroy((gz_stream*)file);
}
+#ifdef STDC
+# define zstrerror(errnum) strerror(errnum)
+#else
+# define zstrerror(errnum) ""
+#endif
+
/* ===========================================================================
- Returns the error message for the last error which occured on the
+ Returns the error message for the last error which occurred on the
given compressed file. errnum is set to zlib error number. If an
- error occured in the file system and not in the compression library,
+ error occurred in the file system and not in the compression library,
errnum is set to Z_ERRNO and the application may consult errno
to get the exact error code.
*/