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[wxWidgets.git] / src / zlib / gzio.c

diff --git a/src/zlib/gzio.c b/src/zlib/gzio.c
index 4afd102b3f35765890ad15df32d02019d1be1fa1..7e90f4928fc0b67a4a4a5c76ab289394c41c7e55 100644 (file)
--- a/src/zlib/gzio.c
+++ b/src/zlib/gzio.c
@@ -1,5 +1,5 @@
 /* gzio.c -- IO on .gz files
 /* 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.
  * 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"
 
 
 #include "zutil.h"
 

-#ifdef NO_DEFLATE       /* for compatiblity with old definition */
+#ifdef NO_DEFLATE       /* for compatibility with old definition */

 #  define NO_GZCOMPRESS
 #endif
 
 #  define NO_GZCOMPRESS
 #endif
 


@@ -220,7 +220,7 @@ gzFile ZEXPORT gzdopen (fd, mode)
     int fd;
     const char *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 */
 
     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;
     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;
         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;
     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;
         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++;
         s->stream.avail_out--;
         s->back = EOF;
         s->out++;

+        start++;

         if (s->last) {
             s->z_err = Z_STREAM_END;
             return 1;
         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_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;
             }
             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;
         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)) {
             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));
 
     }
     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);
 }
 
     return (int)(len - s->stream.avail_out);
 }
 


@@ -898,6 +902,18 @@ int ZEXPORT gzeof (file)
     return s->z_err == Z_STREAM_END;
 }
 
     return s->z_err == Z_STREAM_END;
 }
 

+/* ===========================================================================
+     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
 */
 /* ===========================================================================
    Outputs a long in LSB order to the given file
 */


@@ -937,7 +953,6 @@ local uLong getLong (s)
 int ZEXPORT gzclose (file)
     gzFile file;
 {
 int ZEXPORT gzclose (file)
     gzFile file;
 {

-    int err;

     gz_stream *s = (gz_stream*)file;
 
     if (s == NULL) return Z_STREAM_ERROR;
     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
 #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));
 
         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);
 }
 
     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
    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.
 */
    errnum is set to Z_ERRNO and the application may consult errno
    to get the exact error code.
 */