/* 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
- * 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
#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.
*/
-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)
- (*(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 */
- 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
* 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)
- (*(png_ptr->warning_fn))(png_ptr, message);
+ (*(png_ptr->warning_fn))(png_ptr,
+ (png_const_charp)(warning_message+offset));
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 []
*/
#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;
- while (iin < 4) {
+ while (iin < 4)
+ {
int c = png_ptr->chunk_name[iin++];
- if (isnonalpha(c)) {
+ if (isnonalpha(c))
+ {
buffer[iout++] = '[';
buffer[iout++] = png_digit[(c & 0xf0) >> 4];
- buffer[iout++] = png_digit[c & 0xf];
+ buffer[iout++] = png_digit[c & 0x0f];
buffer[iout++] = ']';
- } else {
- buffer[iout++] = c;
+ }
+ else
+ {
+ buffer[iout++] = (png_byte)c;
}
}
- if (message == NULL)
+ if (error_message == NULL)
buffer[iout] = 0;
- else {
+ else
+ {
buffer[iout++] = ':';
buffer[iout++] = ' ';
- png_memcpy(buffer+iout, message, 64);
+ png_memcpy(buffer+iout, error_message, 64);
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);
}
-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);
}
* 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
-#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);
}
-#else
+# else
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
- * 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.
*/
-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
+ if (png_ptr)
+ return;
}
/* This function is called when the application wants to use another method
* 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)
{
* 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);
}
-
+#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
projects / wxWidgets.git / blobdiff