my previous commit patched the wrong file

[wxWidgets.git] / src / png / pngerror.c

diff --git a/src/png/pngerror.c b/src/png/pngerror.c
index 3dd1dae014fc8e11feeba96325b856144a53dc7f..159c5d42c1925bcc748d40970317afca1df96c30 100644 (file)
--- a/src/png/pngerror.c
+++ b/src/png/pngerror.c
@@ -1,9 +1,9 @@
 
 /* pngerror.c - stub functions for i/o and memory allocation
  *
 
 /* pngerror.c - stub functions for i/o and memory allocation
  *

- * libpng 1.2.5rc3 - September 18, 2002
+ * Last changed in libpng 1.2.20 September 8, 2007

  * For conditions of distribution and use, see copyright notice in png.h
  * For conditions of distribution and use, see copyright notice in png.h

- * Copyright (c) 1998-2002 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2007 Glenn Randers-Pehrson

  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
  *
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
  *


@@ -16,61 +16,82 @@
 #define PNG_INTERNAL
 #include "png.h"
 
 #define PNG_INTERNAL
 #include "png.h"
 

+#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)

 static void /* PRIVATE */
 png_default_error PNGARG((png_structp png_ptr,
   png_const_charp error_message));
 static void /* PRIVATE */
 png_default_error PNGARG((png_structp png_ptr,
   png_const_charp error_message));

+#ifndef PNG_NO_WARNINGS

 static void /* PRIVATE */
 png_default_warning PNGARG((png_structp png_ptr,
   png_const_charp warning_message));
 static void /* PRIVATE */
 png_default_warning PNGARG((png_structp png_ptr,
   png_const_charp warning_message));

+#endif /* PNG_NO_WARNINGS */

 
 /* This function is called whenever there is a fatal error.  This function
  * should not be changed.  If there is a need to handle errors differently,
  * you should supply a replacement error function and use png_set_error_fn()
  * to replace the error function at run-time.
  */
 
 /* This function is called whenever there is a fatal error.  This function
  * should not be changed.  If there is a need to handle errors differently,
  * you should supply a replacement error function and use png_set_error_fn()
  * to replace the error function at run-time.
  */

+#ifndef PNG_NO_ERROR_TEXT

 void PNGAPI
 png_error(png_structp png_ptr, png_const_charp error_message)
 {
 #ifdef PNG_ERROR_NUMBERS_SUPPORTED
    char msg[16];
 void PNGAPI
 png_error(png_structp png_ptr, png_const_charp error_message)
 {
 #ifdef PNG_ERROR_NUMBERS_SUPPORTED
    char msg[16];

-   if (png_ptr->flags&(PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))
+   if (png_ptr != NULL)

    {
    {

-     int offset = 0;
-     if (*error_message == '#')
+     if (png_ptr->flags&
+       (PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))

      {
      {

-         for (offset=1; offset<15; offset++)
-            if (*(error_message+offset) == ' ')
-                break;
-         if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT)
-         {
-            int i;
-            for (i=0; i<offset-1; i++)
-               msg[i]=error_message[i+1];
-            msg[i]='\0';
-            error_message=msg;
-         }
-         else
-            error_message+=offset;
-     }
-     else
-     {
-         if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT)
-         {
-            msg[0]='0';        
-            msg[1]='\0';
-            error_message=msg;
-         }
+       if (*error_message == '#')
+       {
+           int offset;
+           for (offset=1; offset<15; offset++)
+              if (*(error_message+offset) == ' ')
+                  break;
+           if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT)
+           {
+              int i;
+              for (i=0; i<offset-1; i++)
+                 msg[i]=error_message[i+1];
+              msg[i]='\0';
+              error_message=msg;
+           }
+           else
+              error_message+=offset;
+       }
+       else
+       {
+           if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT)
+           {
+              msg[0]='0';
+              msg[1]='\0';
+              error_message=msg;
+           }
+       }

      }
    }
 #endif
      }
    }
 #endif

-   if (png_ptr->error_fn != NULL)
+   if (png_ptr != NULL && png_ptr->error_fn != NULL)

       (*(png_ptr->error_fn))(png_ptr, error_message);
 
       (*(png_ptr->error_fn))(png_ptr, error_message);
 

-   /* if the following returns or doesn't exist, use the default function,
-      which will not return */
+   /* If the custom handler doesn't exist, or if it returns,
+      use the default handler, which will not return. */

    png_default_error(png_ptr, error_message);
 }
    png_default_error(png_ptr, error_message);
 }

+#else
+void PNGAPI
+png_err(png_structp png_ptr)
+{
+   if (png_ptr != NULL && png_ptr->error_fn != NULL)
+      (*(png_ptr->error_fn))(png_ptr, '\0');
+
+   /* If the custom handler doesn't exist, or if it returns,
+      use the default handler, which will not return. */
+   png_default_error(png_ptr, '\0');
+}
+#endif /* PNG_NO_ERROR_TEXT */

 
 

+#ifndef PNG_NO_WARNINGS

 /* This function is called whenever there is a non-fatal error.  This function
  * should not be changed.  If there is a need to handle warnings differently,
  * you should supply a replacement warning function and use
 /* This function is called whenever there is a non-fatal error.  This function
  * should not be changed.  If there is a need to handle warnings differently,
  * you should supply a replacement warning function and use


@@ -79,24 +100,29 @@ png_error(png_structp png_ptr, png_const_charp error_message)
 void PNGAPI
 png_warning(png_structp png_ptr, png_const_charp warning_message)
 {
 void PNGAPI
 png_warning(png_structp png_ptr, png_const_charp warning_message)
 {

-     int offset = 0;
+   int offset = 0;
+   if (png_ptr != NULL)
+   {

 #ifdef PNG_ERROR_NUMBERS_SUPPORTED
 #ifdef PNG_ERROR_NUMBERS_SUPPORTED

-   if (png_ptr->flags&(PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))
+   if (png_ptr->flags&
+     (PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))

 #endif
 #endif

-   {
-     if (*warning_message == '#')

      {
      {

-         for (offset=1; offset<15; offset++)
-            if (*(warning_message+offset) == ' ')
-                break;
+       if (*warning_message == '#')
+       {
+           for (offset=1; offset<15; offset++)
+              if (*(warning_message+offset) == ' ')
+                  break;
+       }

      }
      }

+     if (png_ptr != NULL && png_ptr->warning_fn != NULL)
+        (*(png_ptr->warning_fn))(png_ptr, warning_message+offset);

    }
    }

-   if (png_ptr->warning_fn != NULL)
-      (*(png_ptr->warning_fn))(png_ptr,
-         (png_const_charp)(warning_message+offset));

    else
    else

-      png_default_warning(png_ptr, (png_const_charp)(warning_message+offset));
+      png_default_warning(png_ptr, warning_message+offset);

 }
 }

+#endif /* PNG_NO_WARNINGS */
+

 
 /* These utilities are used internally to build an error message that relates
  * to the current chunk.  The chunk name comes from png_ptr->chunk_name,
 
 /* These utilities are used internally to build an error message that relates
  * to the current chunk.  The chunk name comes from png_ptr->chunk_name,


@@ -104,19 +130,13 @@ png_warning(png_structp png_ptr, png_const_charp warning_message)
  * to 63 bytes, the name characters are output as hex digits wrapped in []
  * if the character is invalid.
  */
  * to 63 bytes, the name characters are output as hex digits wrapped in []
  * if the character is invalid.
  */

-#define isnonalpha(c) ((c) < 41 || (c) > 122 || ((c) > 90 && (c) < 97))
+#define isnonalpha(c) ((c) < 65 || (c) > 122 || ((c) > 90 && (c) < 97))

 static PNG_CONST char png_digit[16] = {
 static PNG_CONST char png_digit[16] = {

-   '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E',
-   'F' };
-
-static size_t wxstrnlen( const char *s, size_t maxlen )
-{
-       size_t i ;
-       for ( i = 0 ; s[i] && i < maxlen ; ++i )
-               ;
-       return i ;
-}
+   '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
+   'A', 'B', 'C', 'D', 'E', 'F'
+};

 
 

+#if !defined(PNG_NO_WARNINGS) || !defined(PNG_NO_ERROR_TEXT)

 static void /* PRIVATE */
 png_format_buffer(png_structp png_ptr, png_charp buffer, png_const_charp
    error_message)
 static void /* PRIVATE */
 png_format_buffer(png_structp png_ptr, png_charp buffer, png_const_charp
    error_message)


@@ -125,7 +145,7 @@ png_format_buffer(png_structp png_ptr, png_charp buffer, png_const_charp
 
    while (iin < 4)
    {
 
    while (iin < 4)
    {

-      int c = png_ptr->chunk_name[iin++]; 
+      int c = png_ptr->chunk_name[iin++];

       if (isnonalpha(c))
       {
          buffer[iout++] = '[';
       if (isnonalpha(c))
       {
          buffer[iout++] = '[';


@@ -143,30 +163,44 @@ png_format_buffer(png_structp png_ptr, png_charp buffer, png_const_charp
       buffer[iout] = 0;
    else
    {
       buffer[iout] = 0;
    else
    {

-      int len = wxstrnlen(error_message, 64);
- 

       buffer[iout++] = ':';
       buffer[iout++] = ' ';
       buffer[iout++] = ':';
       buffer[iout++] = ' ';

-      png_memcpy(buffer+iout, error_message, len);
-      buffer[iout+len-1] = 0;
+      png_strncpy(buffer+iout, error_message, 63);
+      buffer[iout+63] = 0;

    }
 }
 
    }
 }
 

+#ifdef PNG_READ_SUPPORTED

 void PNGAPI
 png_chunk_error(png_structp png_ptr, png_const_charp error_message)
 {
    char msg[18+64];
 void PNGAPI
 png_chunk_error(png_structp png_ptr, png_const_charp error_message)
 {
    char msg[18+64];

-   png_format_buffer(png_ptr, msg, error_message);
-   png_error(png_ptr, msg);
+   if (png_ptr == NULL)
+     png_error(png_ptr, error_message);
+   else
+   {
+     png_format_buffer(png_ptr, msg, error_message);
+     png_error(png_ptr, msg);
+   }

 }
 }

+#endif /* PNG_READ_SUPPORTED */
+#endif /* !defined(PNG_NO_WARNINGS) || !defined(PNG_NO_ERROR_TEXT) */

 
 

+#ifndef PNG_NO_WARNINGS

 void PNGAPI
 png_chunk_warning(png_structp png_ptr, png_const_charp warning_message)
 {
    char msg[18+64];
 void PNGAPI
 png_chunk_warning(png_structp png_ptr, png_const_charp warning_message)
 {
    char msg[18+64];

-   png_format_buffer(png_ptr, msg, warning_message);
-   png_warning(png_ptr, msg);
+   if (png_ptr == NULL)
+     png_warning(png_ptr, warning_message);
+   else
+   {
+     png_format_buffer(png_ptr, msg, warning_message);
+     png_warning(png_ptr, msg);
+   }

 }
 }

+#endif /* PNG_NO_WARNINGS */
+

 
 /* This is the default error handling function.  Note that replacements for
  * this function MUST NOT RETURN, or the program will likely crash.  This
 
 /* This is the default error handling function.  Note that replacements for
  * this function MUST NOT RETURN, or the program will likely crash.  This


@@ -200,28 +234,30 @@ png_default_error(png_structp png_ptr, png_const_charp error_message)
    else
 #endif
    fprintf(stderr, "libpng error: %s\n", error_message);
    else
 #endif
    fprintf(stderr, "libpng error: %s\n", error_message);

-#else
-   if (error_message)
-     /* make compiler happy */ ;

 #endif
 
 #ifdef PNG_SETJMP_SUPPORTED
 #endif
 
 #ifdef PNG_SETJMP_SUPPORTED

+   if (png_ptr)
+   {

 #  ifdef USE_FAR_KEYWORD
    {
       jmp_buf jmpbuf;
 #  ifdef USE_FAR_KEYWORD
    {
       jmp_buf jmpbuf;

-      png_memcpy(jmpbuf,png_ptr->jmpbuf,sizeof(jmp_buf));
+      png_memcpy(jmpbuf, png_ptr->jmpbuf, png_sizeof(jmp_buf));

       longjmp(jmpbuf, 1);
    }
 #  else
    longjmp(png_ptr->jmpbuf, 1);
       longjmp(jmpbuf, 1);
    }
 #  else
    longjmp(png_ptr->jmpbuf, 1);

-# endif
+#  endif
+   }

 #else
 #else

-   if (png_ptr)
-     /* make compiler happy */ ;

    PNG_ABORT();
 #endif
    PNG_ABORT();
 #endif

+#ifdef PNG_NO_CONSOLE_IO
+   error_message = error_message; /* make compiler happy */
+#endif

 }
 
 }
 

+#ifndef PNG_NO_WARNINGS

 /* This function is called when there is a warning, but the library thinks
  * it can continue anyway.  Replacement functions don't have to do anything
  * here if you don't want them to.  In the default configuration, png_ptr is
 /* This function is called when there is a warning, but the library thinks
  * it can continue anyway.  Replacement functions don't have to do anything
  * here if you don't want them to.  In the default configuration, png_ptr is


@@ -255,12 +291,11 @@ png_default_warning(png_structp png_ptr, png_const_charp warning_message)
 #  endif
      fprintf(stderr, "libpng warning: %s\n", warning_message);
 #else
 #  endif
      fprintf(stderr, "libpng warning: %s\n", warning_message);
 #else

-   if (warning_message)
-     /* appease compiler */ ;
+   warning_message = warning_message; /* make compiler happy */

 #endif
 #endif

-   if (png_ptr)
-      return;
+   png_ptr = png_ptr; /* make compiler happy */

 }
 }

+#endif /* PNG_NO_WARNINGS */

 
 /* This function is called when the application wants to use another method
  * of handling errors and warnings.  Note that the error function MUST NOT
 
 /* This function is called when the application wants to use another method
  * of handling errors and warnings.  Note that the error function MUST NOT


@@ -271,6 +306,8 @@ void PNGAPI
 png_set_error_fn(png_structp png_ptr, png_voidp error_ptr,
    png_error_ptr error_fn, png_error_ptr warning_fn)
 {
 png_set_error_fn(png_structp png_ptr, png_voidp error_ptr,
    png_error_ptr error_fn, png_error_ptr warning_fn)
 {

+   if (png_ptr == NULL)
+      return;

    png_ptr->error_ptr = error_ptr;
    png_ptr->error_fn = error_fn;
    png_ptr->warning_fn = warning_fn;
    png_ptr->error_ptr = error_ptr;
    png_ptr->error_fn = error_fn;
    png_ptr->warning_fn = warning_fn;


@@ -284,6 +321,8 @@ png_set_error_fn(png_structp png_ptr, png_voidp error_ptr,
 png_voidp PNGAPI
 png_get_error_ptr(png_structp png_ptr)
 {
 png_voidp PNGAPI
 png_get_error_ptr(png_structp png_ptr)
 {

+   if (png_ptr == NULL)
+      return NULL;

    return ((png_voidp)png_ptr->error_ptr);
 }
 
    return ((png_voidp)png_ptr->error_ptr);
 }
 


@@ -299,3 +338,4 @@ png_set_strip_error_numbers(png_structp png_ptr, png_uint_32 strip_mode)
    }
 }
 #endif
    }
 }
 #endif

+#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */