remove unneeded wxCHECK_MSG: GetNextMessage() can get the msg even if the event loop...

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

diff --git a/src/png/pngerror.c b/src/png/pngerror.c
index c31201bdf4ebedb49c85714b99d5065185848d06..765217196ba39930afaeb81801aa0ed6bd282ff2 100644 (file)
--- a/src/png/pngerror.c
+++ b/src/png/pngerror.c
@@ -1,159 +1,317 @@
 
 /* pngerror.c - stub functions for i/o and memory allocation
  *
 
 /* pngerror.c - stub functions for i/o and memory allocation
  *

- * libpng 1.0.1
+ * Last changed in libpng 1.2.34 [December 18, 2008]

  * 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) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
- * Copyright (c) 1996, 1997 Andreas Dilger
- * Copyright (c) 1998, Glenn Randers-Pehrson
- * March 15, 1998
+ * Copyright (c) 1998-2008 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.)

  *
  *

- * This file provides a location for all error handling.  Users which
+ * This file provides a location for all error handling.  Users who

  * need special error handling are expected to write replacement functions
  * and use png_set_error_fn() to use those functions.  See the instructions
  * at each function.
  */
 
 #define PNG_INTERNAL
  * need special error handling are expected to write replacement functions
  * and use png_set_error_fn() to use those functions.  See the instructions
  * at each function.
  */
 
 #define PNG_INTERNAL

-#include "../png/png.h"
+#include "png.h"
+#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)

 
 

-static void png_default_error PNGARG((png_structp png_ptr,
-                                      png_const_charp message));
-static void png_default_warning PNGARG((png_structp png_ptr,
-                                        png_const_charp 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));
+#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.
  */

-void
-png_error(png_structp png_ptr, png_const_charp message)
+#ifndef PNG_NO_ERROR_TEXT
+void PNGAPI
+png_error(png_structp png_ptr, png_const_charp error_message)

 {
 {

-   if (png_ptr->error_fn != NULL)
-      (*(png_ptr->error_fn))(png_ptr, message);
+#ifdef PNG_ERROR_NUMBERS_SUPPORTED
+   char msg[16];
+   if (png_ptr != NULL)
+   {
+     if (png_ptr->flags&
+       (PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))
+     {
+       if (*error_message == '#')
+       {
+         /* Strip "#nnnn " from beginning of 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 - 1] = '\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
+   if (png_ptr != NULL && png_ptr->error_fn != NULL)
+      (*(png_ptr->error_fn))(png_ptr, error_message);
+
+   /* 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);
+}
+#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 following returns or doesn't exist, use the default function,
-      which will not return */
-   png_default_error(png_ptr, message);
+   /* 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
  * png_set_error_fn() to replace the warning function at run-time.
  */
 /* 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
  * png_set_error_fn() to replace the warning function at run-time.
  */

-void
-png_warning(png_structp png_ptr, png_const_charp message)
+void PNGAPI
+png_warning(png_structp png_ptr, png_const_charp warning_message)

 {
 {

-   if (png_ptr->warning_fn != NULL)
-      (*(png_ptr->warning_fn))(png_ptr, message);
+   int offset = 0;
+   if (png_ptr != NULL)
+   {
+#ifdef PNG_ERROR_NUMBERS_SUPPORTED
+   if (png_ptr->flags&
+     (PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))
+#endif
+     {
+       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);

    else
    else

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

 }
 }

+#endif /* PNG_NO_WARNINGS */

 
 

-/* These utilities are used internally to build an error message which relates
+
+/* 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,
  * this is used to prefix the message.  The message is limited in length
  * to 63 bytes, the name characters are output as hex digits wrapped in []
  * if the character is invalid.
  */
  * to the current chunk.  The chunk name comes from png_ptr->chunk_name,
  * this is used to prefix the message.  The message is limited in length
  * 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'
+   '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
+   'A', 'B', 'C', 'D', 'E', 'F'

 };
 
 };
 

-static void
-png_format_buffer(png_structp png_ptr, png_charp buffer, png_const_charp message)
+#define PNG_MAX_ERROR_TEXT 64
+
+#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)

 {
    int iout = 0, iin = 0;
 
 {
    int iout = 0, iin = 0;
 

-   while (iin < 4) {
+   while (iin < 4)
+   {

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

-      if (isnonalpha(c)) {
+      if (isnonalpha(c))
+      {

          buffer[iout++] = '[';
          buffer[iout++] = png_digit[(c & 0xf0) >> 4];
          buffer[iout++] = '[';
          buffer[iout++] = png_digit[(c & 0xf0) >> 4];

-         buffer[iout++] = png_digit[c & 0xf];
+         buffer[iout++] = png_digit[c & 0x0f];

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

-      } else {
-         buffer[iout++] = c;
+      }
+      else
+      {
+         buffer[iout++] = (png_byte)c;

       }
    }
 
       }
    }
 

-   if (message == NULL)
-      buffer[iout] = 0;
-   else {
+   if (error_message == NULL)
+      buffer[iout] = '\0';
+   else
+   {

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

-      png_memcpy(buffer+iout, message, 64);
-      buffer[iout+63] = 0;
+      png_memcpy(buffer + iout, error_message, PNG_MAX_ERROR_TEXT);
+      buffer[iout + PNG_MAX_ERROR_TEXT - 1] = '\0';

    }
 }
 
    }
 }
 

-void
-png_chunk_error(png_structp png_ptr, png_const_charp message)
+#ifdef PNG_READ_SUPPORTED
+void PNGAPI
+png_chunk_error(png_structp png_ptr, png_const_charp error_message)

 {
 {

-   char msg[16+64];
-   png_format_buffer(png_ptr, msg, message);
-   png_error(png_ptr, msg);
+   char msg[18+PNG_MAX_ERROR_TEXT];
+   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) */

 
 

-void
-png_chunk_warning(png_structp png_ptr, png_const_charp message)
+#ifndef PNG_NO_WARNINGS
+void PNGAPI
+png_chunk_warning(png_structp png_ptr, png_const_charp warning_message)

 {
 {

-   char msg[16+64];
-   png_format_buffer(png_ptr, msg, message);
-   png_warning(png_ptr, msg);
+   char msg[18+PNG_MAX_ERROR_TEXT];
+   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
  * function is used by default, or if the program supplies NULL for the
  * error function pointer in png_set_error_fn().
  */
 
 /* This is the default error handling function.  Note that replacements for
  * this function MUST NOT RETURN, or the program will likely crash.  This
  * function is used by default, or if the program supplies NULL for the
  * error function pointer in png_set_error_fn().
  */

-static void
-png_default_error(png_structp png_ptr, png_const_charp message)
+static void /* PRIVATE */
+png_default_error(png_structp png_ptr, png_const_charp error_message)

 {
 {

-#ifndef PNG_NO_STDIO
-   fprintf(stderr, "libpng error: %s\n", message);
+#ifndef PNG_NO_CONSOLE_IO
+#ifdef PNG_ERROR_NUMBERS_SUPPORTED
+   if (*error_message == '#')
+   {
+     /* Strip "#nnnn " from beginning of warning message. */
+     int offset;
+     char error_number[16];
+     for (offset = 0; offset<15; offset++)
+     {
+         error_number[offset] = error_message[offset + 1];
+         if (error_message[offset] == ' ')
+             break;
+     }
+     if ((offset > 1) && (offset < 15))
+     {
+       error_number[offset - 1] = '\0';
+       fprintf(stderr, "libpng error no. %s: %s\n", error_number,
+          error_message + offset + 1);
+     }
+     else
+       fprintf(stderr, "libpng error: %s, offset=%d\n", error_message, offset);
+   }
+   else
+#endif
+   fprintf(stderr, "libpng error: %s\n", error_message);

 #endif
 
 #endif
 

-#ifdef USE_FAR_KEYWORD
+#ifdef PNG_SETJMP_SUPPORTED
+   if (png_ptr)
+   {
+#  ifdef USE_FAR_KEYWORD

    {
       jmp_buf jmpbuf;
    {
       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);
    }
       longjmp(jmpbuf, 1);
    }

-#else
+#  else

    longjmp(png_ptr->jmpbuf, 1);
    longjmp(png_ptr->jmpbuf, 1);

+#  endif
+   }
+#else
+   PNG_ABORT();
+#endif
+#ifdef PNG_NO_CONSOLE_IO
+   error_message = error_message; /* make compiler happy */

 #endif
 }
 
 #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
 /* 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 to.  In the default configuration, png_ptr is
+ * here if you don't want them to.  In the default configuration, png_ptr is

  * not used, but it is passed in case it may be useful.
  */
  * not used, but it is passed in case it may be useful.
  */

-static void
-png_default_warning(png_structp png_ptr, png_const_charp message)
+static void /* PRIVATE */
+png_default_warning(png_structp png_ptr, png_const_charp warning_message)

 {
 {

-   if (png_ptr == NULL)
-      return;
-
-#ifndef PNG_NO_STDIO
-   fprintf(stderr, "libpng warning: %s\n", message);
+#ifndef PNG_NO_CONSOLE_IO
+#  ifdef PNG_ERROR_NUMBERS_SUPPORTED
+   if (*warning_message == '#')
+   {
+     int offset;
+     char warning_number[16];
+     for (offset = 0; offset < 15; offset++)
+     {
+        warning_number[offset] = warning_message[offset + 1];
+        if (warning_message[offset] == ' ')
+            break;
+     }
+     if ((offset > 1) && (offset < 15))
+     {
+       warning_number[offset + 1] = '\0';
+       fprintf(stderr, "libpng warning no. %s: %s\n", warning_number,
+          warning_message + offset);
+     }
+     else
+       fprintf(stderr, "libpng warning: %s\n", warning_message);
+   }
+   else
+#  endif
+     fprintf(stderr, "libpng warning: %s\n", warning_message);
+#else
+   warning_message = warning_message; /* make compiler happy */

 #endif
 #endif

+   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
  * return to the calling routine or serious problems will occur.  The return
  * method used in the default routine calls longjmp(png_ptr->jmpbuf, 1)
  */
 
 /* This function is called when the application wants to use another method
  * of handling errors and warnings.  Note that the error function MUST NOT
  * return to the calling routine or serious problems will occur.  The return
  * method used in the default routine calls longjmp(png_ptr->jmpbuf, 1)
  */

-void
+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;


@@ -164,11 +322,24 @@ png_set_error_fn(png_structp png_ptr, png_voidp error_ptr,
  * functions.  The application should free any memory associated with this
  * pointer before png_write_destroy and png_read_destroy are called.
  */
  * functions.  The application should free any memory associated with this
  * pointer before png_write_destroy and png_read_destroy are called.
  */

-png_voidp
+png_voidp PNGAPI

 png_get_error_ptr(png_structp png_ptr)
 {
 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);
 }
 
 

-
+#ifdef PNG_ERROR_NUMBERS_SUPPORTED
+void PNGAPI
+png_set_strip_error_numbers(png_structp png_ptr, png_uint_32 strip_mode)
+{
+   if (png_ptr != NULL)
+   {
+     png_ptr->flags &=
+       ((~(PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))&strip_mode);
+   }
+}
+#endif
+#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */