The world should not end if a server has no peer. Let's return FALSE instead.

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

diff --git a/src/png/pngerror.c b/src/png/pngerror.c
index c31201bdf4ebedb49c85714b99d5065185848d06..e6c197357f42640d1c921f0ed46b097ed25ed508 100644 (file)
--- a/src/png/pngerror.c
+++ b/src/png/pngerror.c
@@ -1,41 +1,74 @@
 
 /* pngerror.c - stub functions for i/o and memory allocation
  *
 
 /* pngerror.c - stub functions for i/o and memory allocation
  *

- * libpng 1.0.1
+ * libpng 1.2.4 - July 8, 2002

  * 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) 1998-2002 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"

 
 

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

 
 /* 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)
+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))
+   {
+     int offset = 0;
+     if (*error_message == '#')
+     {
+         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

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

-      (*(png_ptr->error_fn))(png_ptr, 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 following returns or doesn't exist, use the default function,
       which will not return */

-   png_default_error(png_ptr, message);
+   png_default_error(png_ptr, error_message);

 }
 
 /* This function is called whenever there is a non-fatal error.  This function
 }
 
 /* This function is called whenever there is a non-fatal error.  This function


@@ -43,16 +76,29 @@ png_error(png_structp png_ptr, png_const_charp message)
  * you should supply a replacement warning function and use
  * png_set_error_fn() to replace the warning function at run-time.
  */
  * 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)

 {
 {

+     int offset = 0;
+#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->warning_fn != NULL)
    if (png_ptr->warning_fn != NULL)

-      (*(png_ptr->warning_fn))(png_ptr, message);
+      (*(png_ptr->warning_fn))(png_ptr,
+         (png_const_charp)(warning_message+offset));

    else
    else

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

 }
 
 }
 

-/* 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 []
  * 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 []


@@ -60,49 +106,55 @@ png_warning(png_structp png_ptr, png_const_charp message)
  */
 #define isnonalpha(c) ((c) < 41 || (c) > 122 || ((c) > 90 && (c) < 97))
 static PNG_CONST char png_digit[16] = {
  */
 #define isnonalpha(c) ((c) < 41 || (c) > 122 || ((c) > 90 && (c) < 97))
 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)
+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)
+   if (error_message == NULL)

       buffer[iout] = 0;
       buffer[iout] = 0;

-   else {
+   else
+   {

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

-      png_memcpy(buffer+iout, message, 64);
+      png_memcpy(buffer+iout, error_message, 64);

       buffer[iout+63] = 0;
    }
 }
 
       buffer[iout+63] = 0;
    }
 }
 

-void
-png_chunk_error(png_structp png_ptr, png_const_charp message)
+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);
+   char msg[18+64];
+   png_format_buffer(png_ptr, msg, error_message);

    png_error(png_ptr, msg);
 }
 
    png_error(png_ptr, msg);
 }
 

-void
-png_chunk_warning(png_structp png_ptr, png_const_charp message)
+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);
+   char msg[18+64];
+   png_format_buffer(png_ptr, msg, warning_message);

    png_warning(png_ptr, msg);
 }
 
    png_warning(png_ptr, msg);
 }
 


@@ -111,38 +163,93 @@ png_chunk_warning(png_structp png_ptr, png_const_charp message)
  * function is used by default, or if the program supplies NULL for the
  * error function pointer in png_set_error_fn().
  */
  * 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 == '#')
+   {
+     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);
+     }
+     else
+       fprintf(stderr, "libpng error: %s, offset=%d\n", error_message,offset);
+   }
+   else
+#endif
+   fprintf(stderr, "libpng error: %s\n", error_message);
+#else
+   if (error_message)
+     /* make compiler happy */ ;

 #endif
 
 #endif
 

-#ifdef USE_FAR_KEYWORD
+#ifdef PNG_SETJMP_SUPPORTED
+#  ifdef USE_FAR_KEYWORD

    {
       jmp_buf jmpbuf;
       png_memcpy(jmpbuf,png_ptr->jmpbuf,sizeof(jmp_buf));
       longjmp(jmpbuf, 1);
    }
    {
       jmp_buf jmpbuf;
       png_memcpy(jmpbuf,png_ptr->jmpbuf,sizeof(jmp_buf));
       longjmp(jmpbuf, 1);
    }

-#else
+#  else

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

+# endif
+#else
+   if (png_ptr)
+     /* make compiler happy */ ;
+   PNG_ABORT();

 #endif
 }
 
 /* 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
 #endif
 }
 
 /* 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
+   if (warning_message)
+     /* appease compiler */ ;

 #endif
 #endif

+   if (png_ptr)
+      return;

 }
 
 /* This function is called when the application wants to use another method
 }
 
 /* This function is called when the application wants to use another method


@@ -150,7 +257,7 @@ png_default_warning(png_structp png_ptr, png_const_charp message)
  * return to the calling routine or serious problems will occur.  The return
  * method used in the default routine calls longjmp(png_ptr->jmpbuf, 1)
  */
  * 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)
 {


@@ -164,11 +271,21 @@ 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)
 {
    return ((png_voidp)png_ptr->error_ptr);
 }
 
 
 png_get_error_ptr(png_structp png_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