Only call GetTextMetrics() in wxDC::GetTextExtent() if necessary.

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

diff --git a/src/zlib/gzio.c b/src/zlib/gzio.c
index 5e71b0ab3ae892c0c68cf8337567b897a6e35b93..d6b55d5b6c8e07e57cd663f7e90066900206e022 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
 


@@ -43,6 +43,12 @@ extern void   free   OF((voidpf ptr));
 #define ALLOC(size) malloc(size)
 #define TRYFREE(p) {if (p) free(p);}
 
 #define ALLOC(size) malloc(size)
 #define TRYFREE(p) {if (p) free(p);}
 

+/* there is no errno under Windows CE, provide a dummy one to avoid modifying
+   too much code in this file */
+#ifdef _WIN32_WCE
+static int errno;
+#endif
+

 static int const gz_magic[2] = {0x1f, 0x8b}; /* gzip magic header */
 
 /* gzip flag byte */
 static int const gz_magic[2] = {0x1f, 0x8b}; /* gzip magic header */
 
 /* gzip flag byte */


@@ -220,7 +226,7 @@ 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 +270,7 @@ 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 +306,7 @@ 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 +421,7 @@ 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 +443,8 @@ 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;


@@ -448,17 +455,13 @@ 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)) {
                     s->z_err = Z_ERRNO;
                     break;
                 }
             if (s->stream.avail_in == 0) {
                 s->z_eof = 1;
                 if (ferror(s->file)) {
                     s->z_err = Z_ERRNO;
                     break;
                 }

-                if (feof(s->file)) {        /* avoid error for empty file */
-                    s->z_err = Z_STREAM_END;
-                    break;
-                }

             }
             s->stream.next_in = s->inbuf;
         }
             }
             s->stream.next_in = s->inbuf;
         }


@@ -492,6 +495,9 @@ 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);
 }
 


@@ -902,6 +908,18 @@ 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
 */


@@ -941,7 +959,6 @@ 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;


@@ -950,8 +967,8 @@ 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));


@@ -960,10 +977,16 @@ 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.
 */