Wei Chang Shen / DMemWin

Dependencies:   emwin_lib

Fork of DMemWin by Embedded Artists

png/pngerror.c@4:20387dbf7ecf, 2016-06-02 (annotated)

Committer:
destinyXfate
Date:
Thu Jun 02 04:55:08 2016 +0000
Revision:
4:20387dbf7ecf
Parent:
2:0e2ef1edf01b 
;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
destinyXfate 2:0e2ef1edf01b 1
destinyXfate 2:0e2ef1edf01b 2 /* pngerror.c - stub functions for i/o and memory allocation
destinyXfate 2:0e2ef1edf01b 3 *
destinyXfate 2:0e2ef1edf01b 4 * Last changed in libpng 1.2.13 November 13, 2006
destinyXfate 2:0e2ef1edf01b 5 * For conditions of distribution and use, see copyright notice in png.h
destinyXfate 2:0e2ef1edf01b 6 * Copyright (c) 1998-2006 Glenn Randers-Pehrson
destinyXfate 2:0e2ef1edf01b 7 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
destinyXfate 2:0e2ef1edf01b 8 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
destinyXfate 2:0e2ef1edf01b 9 *
destinyXfate 2:0e2ef1edf01b 10 * This file provides a location for all error handling. Users who
destinyXfate 2:0e2ef1edf01b 11 * need special error handling are expected to write replacement functions
destinyXfate 2:0e2ef1edf01b 12 * and use png_set_error_fn() to use those functions. See the instructions
destinyXfate 2:0e2ef1edf01b 13 * at each function.
destinyXfate 2:0e2ef1edf01b 14 */
destinyXfate 2:0e2ef1edf01b 15
destinyXfate 2:0e2ef1edf01b 16 #define PNG_INTERNAL
destinyXfate 2:0e2ef1edf01b 17 #include "png.h"
destinyXfate 2:0e2ef1edf01b 18
destinyXfate 2:0e2ef1edf01b 19 #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
destinyXfate 2:0e2ef1edf01b 20 static void /* PRIVATE */
destinyXfate 2:0e2ef1edf01b 21 png_default_error PNGARG((png_structp png_ptr,
destinyXfate 2:0e2ef1edf01b 22 png_const_charp error_message));
destinyXfate 2:0e2ef1edf01b 23 static void /* PRIVATE */
destinyXfate 2:0e2ef1edf01b 24 png_default_warning PNGARG((png_structp png_ptr,
destinyXfate 2:0e2ef1edf01b 25 png_const_charp warning_message));
destinyXfate 2:0e2ef1edf01b 26
destinyXfate 2:0e2ef1edf01b 27 /* This function is called whenever there is a fatal error. This function
destinyXfate 2:0e2ef1edf01b 28 * should not be changed. If there is a need to handle errors differently,
destinyXfate 2:0e2ef1edf01b 29 * you should supply a replacement error function and use png_set_error_fn()
destinyXfate 2:0e2ef1edf01b 30 * to replace the error function at run-time.
destinyXfate 2:0e2ef1edf01b 31 */
destinyXfate 2:0e2ef1edf01b 32 void PNGAPI
destinyXfate 2:0e2ef1edf01b 33 png_error(png_structp png_ptr, png_const_charp error_message)
destinyXfate 2:0e2ef1edf01b 34 {
destinyXfate 2:0e2ef1edf01b 35 #ifdef PNG_ERROR_NUMBERS_SUPPORTED
destinyXfate 2:0e2ef1edf01b 36 char msg[16];
destinyXfate 2:0e2ef1edf01b 37 if (png_ptr != NULL)
destinyXfate 2:0e2ef1edf01b 38 {
destinyXfate 2:0e2ef1edf01b 39 if (png_ptr->flags&
destinyXfate 2:0e2ef1edf01b 40 (PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))
destinyXfate 2:0e2ef1edf01b 41 {
destinyXfate 2:0e2ef1edf01b 42 if (*error_message == '#')
destinyXfate 2:0e2ef1edf01b 43 {
destinyXfate 2:0e2ef1edf01b 44 int offset;
destinyXfate 2:0e2ef1edf01b 45 for (offset=1; offset<15; offset++)
destinyXfate 2:0e2ef1edf01b 46 if (*(error_message+offset) == ' ')
destinyXfate 2:0e2ef1edf01b 47 break;
destinyXfate 2:0e2ef1edf01b 48 if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT)
destinyXfate 2:0e2ef1edf01b 49 {
destinyXfate 2:0e2ef1edf01b 50 int i;
destinyXfate 2:0e2ef1edf01b 51 for (i=0; i<offset-1; i++)
destinyXfate 2:0e2ef1edf01b 52 msg[i]=error_message[i+1];
destinyXfate 2:0e2ef1edf01b 53 msg[i]='\0';
destinyXfate 2:0e2ef1edf01b 54 error_message=msg;
destinyXfate 2:0e2ef1edf01b 55 }
destinyXfate 2:0e2ef1edf01b 56 else
destinyXfate 2:0e2ef1edf01b 57 error_message+=offset;
destinyXfate 2:0e2ef1edf01b 58 }
destinyXfate 2:0e2ef1edf01b 59 else
destinyXfate 2:0e2ef1edf01b 60 {
destinyXfate 2:0e2ef1edf01b 61 if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT)
destinyXfate 2:0e2ef1edf01b 62 {
destinyXfate 2:0e2ef1edf01b 63 msg[0]='0';
destinyXfate 2:0e2ef1edf01b 64 msg[1]='\0';
destinyXfate 2:0e2ef1edf01b 65 error_message=msg;
destinyXfate 2:0e2ef1edf01b 66 }
destinyXfate 2:0e2ef1edf01b 67 }
destinyXfate 2:0e2ef1edf01b 68 }
destinyXfate 2:0e2ef1edf01b 69 }
destinyXfate 2:0e2ef1edf01b 70 #endif
destinyXfate 2:0e2ef1edf01b 71 if (png_ptr != NULL && png_ptr->error_fn != NULL)
destinyXfate 2:0e2ef1edf01b 72 (*(png_ptr->error_fn))(png_ptr, error_message);
destinyXfate 2:0e2ef1edf01b 73
destinyXfate 2:0e2ef1edf01b 74 /* If the custom handler doesn't exist, or if it returns,
destinyXfate 2:0e2ef1edf01b 75 use the default handler, which will not return. */
destinyXfate 2:0e2ef1edf01b 76 png_default_error(png_ptr, error_message);
destinyXfate 2:0e2ef1edf01b 77 }
destinyXfate 2:0e2ef1edf01b 78
destinyXfate 2:0e2ef1edf01b 79 /* This function is called whenever there is a non-fatal error. This function
destinyXfate 2:0e2ef1edf01b 80 * should not be changed. If there is a need to handle warnings differently,
destinyXfate 2:0e2ef1edf01b 81 * you should supply a replacement warning function and use
destinyXfate 2:0e2ef1edf01b 82 * png_set_error_fn() to replace the warning function at run-time.
destinyXfate 2:0e2ef1edf01b 83 */
destinyXfate 2:0e2ef1edf01b 84 void PNGAPI
destinyXfate 2:0e2ef1edf01b 85 png_warning(png_structp png_ptr, png_const_charp warning_message)
destinyXfate 2:0e2ef1edf01b 86 {
destinyXfate 2:0e2ef1edf01b 87 int offset = 0;
destinyXfate 2:0e2ef1edf01b 88 if (png_ptr != NULL)
destinyXfate 2:0e2ef1edf01b 89 {
destinyXfate 2:0e2ef1edf01b 90 #ifdef PNG_ERROR_NUMBERS_SUPPORTED
destinyXfate 2:0e2ef1edf01b 91 if (png_ptr->flags&
destinyXfate 2:0e2ef1edf01b 92 (PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))
destinyXfate 2:0e2ef1edf01b 93 #endif
destinyXfate 2:0e2ef1edf01b 94 {
destinyXfate 2:0e2ef1edf01b 95 if (*warning_message == '#')
destinyXfate 2:0e2ef1edf01b 96 {
destinyXfate 2:0e2ef1edf01b 97 for (offset=1; offset<15; offset++)
destinyXfate 2:0e2ef1edf01b 98 if (*(warning_message+offset) == ' ')
destinyXfate 2:0e2ef1edf01b 99 break;
destinyXfate 2:0e2ef1edf01b 100 }
destinyXfate 2:0e2ef1edf01b 101 }
destinyXfate 2:0e2ef1edf01b 102 if (png_ptr != NULL && png_ptr->warning_fn != NULL)
destinyXfate 2:0e2ef1edf01b 103 (*(png_ptr->warning_fn))(png_ptr, warning_message+offset);
destinyXfate 2:0e2ef1edf01b 104 }
destinyXfate 2:0e2ef1edf01b 105 else
destinyXfate 2:0e2ef1edf01b 106 png_default_warning(png_ptr, warning_message+offset);
destinyXfate 2:0e2ef1edf01b 107 }
destinyXfate 2:0e2ef1edf01b 108
destinyXfate 2:0e2ef1edf01b 109 /* These utilities are used internally to build an error message that relates
destinyXfate 2:0e2ef1edf01b 110 * to the current chunk. The chunk name comes from png_ptr->chunk_name,
destinyXfate 2:0e2ef1edf01b 111 * this is used to prefix the message. The message is limited in length
destinyXfate 2:0e2ef1edf01b 112 * to 63 bytes, the name characters are output as hex digits wrapped in []
destinyXfate 2:0e2ef1edf01b 113 * if the character is invalid.
destinyXfate 2:0e2ef1edf01b 114 */
destinyXfate 2:0e2ef1edf01b 115 #define isnonalpha(c) ((c) < 65 || (c) > 122 || ((c) > 90 && (c) < 97))
destinyXfate 2:0e2ef1edf01b 116 static PNG_CONST char png_digit[16] = {
destinyXfate 2:0e2ef1edf01b 117 '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
destinyXfate 2:0e2ef1edf01b 118 'A', 'B', 'C', 'D', 'E', 'F'
destinyXfate 2:0e2ef1edf01b 119 };
destinyXfate 2:0e2ef1edf01b 120
destinyXfate 2:0e2ef1edf01b 121 static void /* PRIVATE */
destinyXfate 2:0e2ef1edf01b 122 png_format_buffer(png_structp png_ptr, png_charp buffer, png_const_charp
destinyXfate 2:0e2ef1edf01b 123 error_message)
destinyXfate 2:0e2ef1edf01b 124 {
destinyXfate 2:0e2ef1edf01b 125 int iout = 0, iin = 0;
destinyXfate 2:0e2ef1edf01b 126
destinyXfate 2:0e2ef1edf01b 127 while (iin < 4)
destinyXfate 2:0e2ef1edf01b 128 {
destinyXfate 2:0e2ef1edf01b 129 int c = png_ptr->chunk_name[iin++];
destinyXfate 2:0e2ef1edf01b 130 if (isnonalpha(c))
destinyXfate 2:0e2ef1edf01b 131 {
destinyXfate 2:0e2ef1edf01b 132 buffer[iout++] = '[';
destinyXfate 2:0e2ef1edf01b 133 buffer[iout++] = png_digit[(c & 0xf0) >> 4];
destinyXfate 2:0e2ef1edf01b 134 buffer[iout++] = png_digit[c & 0x0f];
destinyXfate 2:0e2ef1edf01b 135 buffer[iout++] = ']';
destinyXfate 2:0e2ef1edf01b 136 }
destinyXfate 2:0e2ef1edf01b 137 else
destinyXfate 2:0e2ef1edf01b 138 {
destinyXfate 2:0e2ef1edf01b 139 buffer[iout++] = (png_byte)c;
destinyXfate 2:0e2ef1edf01b 140 }
destinyXfate 2:0e2ef1edf01b 141 }
destinyXfate 2:0e2ef1edf01b 142
destinyXfate 2:0e2ef1edf01b 143 if (error_message == NULL)
destinyXfate 2:0e2ef1edf01b 144 buffer[iout] = 0;
destinyXfate 2:0e2ef1edf01b 145 else
destinyXfate 2:0e2ef1edf01b 146 {
destinyXfate 2:0e2ef1edf01b 147 buffer[iout++] = ':';
destinyXfate 2:0e2ef1edf01b 148 buffer[iout++] = ' ';
destinyXfate 2:0e2ef1edf01b 149 png_strncpy(buffer+iout, error_message, 63);
destinyXfate 2:0e2ef1edf01b 150 buffer[iout+63] = 0;
destinyXfate 2:0e2ef1edf01b 151 }
destinyXfate 2:0e2ef1edf01b 152 }
destinyXfate 2:0e2ef1edf01b 153
destinyXfate 2:0e2ef1edf01b 154 void PNGAPI
destinyXfate 2:0e2ef1edf01b 155 png_chunk_error(png_structp png_ptr, png_const_charp error_message)
destinyXfate 2:0e2ef1edf01b 156 {
destinyXfate 2:0e2ef1edf01b 157 char msg[18+64];
destinyXfate 2:0e2ef1edf01b 158 if (png_ptr == NULL)
destinyXfate 2:0e2ef1edf01b 159 png_error(png_ptr, error_message);
destinyXfate 2:0e2ef1edf01b 160 else
destinyXfate 2:0e2ef1edf01b 161 {
destinyXfate 2:0e2ef1edf01b 162 png_format_buffer(png_ptr, msg, error_message);
destinyXfate 2:0e2ef1edf01b 163 png_error(png_ptr, msg);
destinyXfate 2:0e2ef1edf01b 164 }
destinyXfate 2:0e2ef1edf01b 165 }
destinyXfate 2:0e2ef1edf01b 166
destinyXfate 2:0e2ef1edf01b 167 void PNGAPI
destinyXfate 2:0e2ef1edf01b 168 png_chunk_warning(png_structp png_ptr, png_const_charp warning_message)
destinyXfate 2:0e2ef1edf01b 169 {
destinyXfate 2:0e2ef1edf01b 170 char msg[18+64];
destinyXfate 2:0e2ef1edf01b 171 if (png_ptr == NULL)
destinyXfate 2:0e2ef1edf01b 172 png_warning(png_ptr, warning_message);
destinyXfate 2:0e2ef1edf01b 173 else
destinyXfate 2:0e2ef1edf01b 174 {
destinyXfate 2:0e2ef1edf01b 175 png_format_buffer(png_ptr, msg, warning_message);
destinyXfate 2:0e2ef1edf01b 176 png_warning(png_ptr, msg);
destinyXfate 2:0e2ef1edf01b 177 }
destinyXfate 2:0e2ef1edf01b 178 }
destinyXfate 2:0e2ef1edf01b 179
destinyXfate 2:0e2ef1edf01b 180 /* This is the default error handling function. Note that replacements for
destinyXfate 2:0e2ef1edf01b 181 * this function MUST NOT RETURN, or the program will likely crash. This
destinyXfate 2:0e2ef1edf01b 182 * function is used by default, or if the program supplies NULL for the
destinyXfate 2:0e2ef1edf01b 183 * error function pointer in png_set_error_fn().
destinyXfate 2:0e2ef1edf01b 184 */
destinyXfate 2:0e2ef1edf01b 185 static void /* PRIVATE */
destinyXfate 2:0e2ef1edf01b 186 png_default_error(png_structp png_ptr, png_const_charp error_message)
destinyXfate 2:0e2ef1edf01b 187 {
destinyXfate 2:0e2ef1edf01b 188 #ifndef PNG_NO_CONSOLE_IO
destinyXfate 2:0e2ef1edf01b 189 #ifdef PNG_ERROR_NUMBERS_SUPPORTED
destinyXfate 2:0e2ef1edf01b 190 if (*error_message == '#')
destinyXfate 2:0e2ef1edf01b 191 {
destinyXfate 2:0e2ef1edf01b 192 int offset;
destinyXfate 2:0e2ef1edf01b 193 char error_number[16];
destinyXfate 2:0e2ef1edf01b 194 for (offset=0; offset<15; offset++)
destinyXfate 2:0e2ef1edf01b 195 {
destinyXfate 2:0e2ef1edf01b 196 error_number[offset] = *(error_message+offset+1);
destinyXfate 2:0e2ef1edf01b 197 if (*(error_message+offset) == ' ')
destinyXfate 2:0e2ef1edf01b 198 break;
destinyXfate 2:0e2ef1edf01b 199 }
destinyXfate 2:0e2ef1edf01b 200 if((offset > 1) && (offset < 15))
destinyXfate 2:0e2ef1edf01b 201 {
destinyXfate 2:0e2ef1edf01b 202 error_number[offset-1]='\0';
destinyXfate 2:0e2ef1edf01b 203 fprintf(stderr, "libpng error no. %s: %s\n", error_number,
destinyXfate 2:0e2ef1edf01b 204 error_message+offset);
destinyXfate 2:0e2ef1edf01b 205 }
destinyXfate 2:0e2ef1edf01b 206 else
destinyXfate 2:0e2ef1edf01b 207 fprintf(stderr, "libpng error: %s, offset=%d\n", error_message,offset);
destinyXfate 2:0e2ef1edf01b 208 }
destinyXfate 2:0e2ef1edf01b 209 else
destinyXfate 2:0e2ef1edf01b 210 #endif
destinyXfate 2:0e2ef1edf01b 211 fprintf(stderr, "libpng error: %s\n", error_message);
destinyXfate 2:0e2ef1edf01b 212 #endif
destinyXfate 2:0e2ef1edf01b 213
destinyXfate 2:0e2ef1edf01b 214 #ifdef PNG_SETJMP_SUPPORTED
destinyXfate 2:0e2ef1edf01b 215 if (png_ptr)
destinyXfate 2:0e2ef1edf01b 216 {
destinyXfate 2:0e2ef1edf01b 217 # ifdef USE_FAR_KEYWORD
destinyXfate 2:0e2ef1edf01b 218 {
destinyXfate 2:0e2ef1edf01b 219 jmp_buf jmpbuf;
destinyXfate 2:0e2ef1edf01b 220 png_memcpy(jmpbuf,png_ptr->jmpbuf,png_sizeof(jmp_buf));
destinyXfate 2:0e2ef1edf01b 221 longjmp(jmpbuf, 1);
destinyXfate 2:0e2ef1edf01b 222 }
destinyXfate 2:0e2ef1edf01b 223 # else
destinyXfate 2:0e2ef1edf01b 224 longjmp(png_ptr->jmpbuf, 1);
destinyXfate 2:0e2ef1edf01b 225 # endif
destinyXfate 2:0e2ef1edf01b 226 }
destinyXfate 2:0e2ef1edf01b 227 #else
destinyXfate 2:0e2ef1edf01b 228 PNG_ABORT();
destinyXfate 2:0e2ef1edf01b 229 #endif
destinyXfate 2:0e2ef1edf01b 230 #ifdef PNG_NO_CONSOLE_IO
destinyXfate 2:0e2ef1edf01b 231 /* make compiler happy */ ;
destinyXfate 2:0e2ef1edf01b 232 if (&error_message != NULL)
destinyXfate 2:0e2ef1edf01b 233 return;
destinyXfate 2:0e2ef1edf01b 234 #endif
destinyXfate 2:0e2ef1edf01b 235 }
destinyXfate 2:0e2ef1edf01b 236
destinyXfate 2:0e2ef1edf01b 237 /* This function is called when there is a warning, but the library thinks
destinyXfate 2:0e2ef1edf01b 238 * it can continue anyway. Replacement functions don't have to do anything
destinyXfate 2:0e2ef1edf01b 239 * here if you don't want them to. In the default configuration, png_ptr is
destinyXfate 2:0e2ef1edf01b 240 * not used, but it is passed in case it may be useful.
destinyXfate 2:0e2ef1edf01b 241 */
destinyXfate 2:0e2ef1edf01b 242 static void /* PRIVATE */
destinyXfate 2:0e2ef1edf01b 243 png_default_warning(png_structp png_ptr, png_const_charp warning_message)
destinyXfate 2:0e2ef1edf01b 244 {
destinyXfate 2:0e2ef1edf01b 245 #ifndef PNG_NO_CONSOLE_IO
destinyXfate 2:0e2ef1edf01b 246 # ifdef PNG_ERROR_NUMBERS_SUPPORTED
destinyXfate 2:0e2ef1edf01b 247 if (*warning_message == '#')
destinyXfate 2:0e2ef1edf01b 248 {
destinyXfate 2:0e2ef1edf01b 249 int offset;
destinyXfate 2:0e2ef1edf01b 250 char warning_number[16];
destinyXfate 2:0e2ef1edf01b 251 for (offset=0; offset<15; offset++)
destinyXfate 2:0e2ef1edf01b 252 {
destinyXfate 2:0e2ef1edf01b 253 warning_number[offset]=*(warning_message+offset+1);
destinyXfate 2:0e2ef1edf01b 254 if (*(warning_message+offset) == ' ')
destinyXfate 2:0e2ef1edf01b 255 break;
destinyXfate 2:0e2ef1edf01b 256 }
destinyXfate 2:0e2ef1edf01b 257 if((offset > 1) && (offset < 15))
destinyXfate 2:0e2ef1edf01b 258 {
destinyXfate 2:0e2ef1edf01b 259 warning_number[offset-1]='\0';
destinyXfate 2:0e2ef1edf01b 260 fprintf(stderr, "libpng warning no. %s: %s\n", warning_number,
destinyXfate 2:0e2ef1edf01b 261 warning_message+offset);
destinyXfate 2:0e2ef1edf01b 262 }
destinyXfate 2:0e2ef1edf01b 263 else
destinyXfate 2:0e2ef1edf01b 264 fprintf(stderr, "libpng warning: %s\n", warning_message);
destinyXfate 2:0e2ef1edf01b 265 }
destinyXfate 2:0e2ef1edf01b 266 else
destinyXfate 2:0e2ef1edf01b 267 # endif
destinyXfate 2:0e2ef1edf01b 268 fprintf(stderr, "libpng warning: %s\n", warning_message);
destinyXfate 2:0e2ef1edf01b 269 #else
destinyXfate 2:0e2ef1edf01b 270 /* make compiler happy */ ;
destinyXfate 2:0e2ef1edf01b 271 if (warning_message)
destinyXfate 2:0e2ef1edf01b 272 return;
destinyXfate 2:0e2ef1edf01b 273 #endif
destinyXfate 2:0e2ef1edf01b 274 /* make compiler happy */ ;
destinyXfate 2:0e2ef1edf01b 275 if (png_ptr)
destinyXfate 2:0e2ef1edf01b 276 return;
destinyXfate 2:0e2ef1edf01b 277 }
destinyXfate 2:0e2ef1edf01b 278
destinyXfate 2:0e2ef1edf01b 279 /* This function is called when the application wants to use another method
destinyXfate 2:0e2ef1edf01b 280 * of handling errors and warnings. Note that the error function MUST NOT
destinyXfate 2:0e2ef1edf01b 281 * return to the calling routine or serious problems will occur. The return
destinyXfate 2:0e2ef1edf01b 282 * method used in the default routine calls longjmp(png_ptr->jmpbuf, 1)
destinyXfate 2:0e2ef1edf01b 283 */
destinyXfate 2:0e2ef1edf01b 284 void PNGAPI
destinyXfate 2:0e2ef1edf01b 285 png_set_error_fn(png_structp png_ptr, png_voidp error_ptr,
destinyXfate 2:0e2ef1edf01b 286 png_error_ptr error_fn, png_error_ptr warning_fn)
destinyXfate 2:0e2ef1edf01b 287 {
destinyXfate 2:0e2ef1edf01b 288 if (png_ptr == NULL)
destinyXfate 2:0e2ef1edf01b 289 return;
destinyXfate 2:0e2ef1edf01b 290 png_ptr->error_ptr = error_ptr;
destinyXfate 2:0e2ef1edf01b 291 png_ptr->error_fn = error_fn;
destinyXfate 2:0e2ef1edf01b 292 png_ptr->warning_fn = warning_fn;
destinyXfate 2:0e2ef1edf01b 293 }
destinyXfate 2:0e2ef1edf01b 294
destinyXfate 2:0e2ef1edf01b 295
destinyXfate 2:0e2ef1edf01b 296 /* This function returns a pointer to the error_ptr associated with the user
destinyXfate 2:0e2ef1edf01b 297 * functions. The application should free any memory associated with this
destinyXfate 2:0e2ef1edf01b 298 * pointer before png_write_destroy and png_read_destroy are called.
destinyXfate 2:0e2ef1edf01b 299 */
destinyXfate 2:0e2ef1edf01b 300 png_voidp PNGAPI
destinyXfate 2:0e2ef1edf01b 301 png_get_error_ptr(png_structp png_ptr)
destinyXfate 2:0e2ef1edf01b 302 {
destinyXfate 2:0e2ef1edf01b 303 if (png_ptr == NULL)
destinyXfate 2:0e2ef1edf01b 304 return NULL;
destinyXfate 2:0e2ef1edf01b 305 return ((png_voidp)png_ptr->error_ptr);
destinyXfate 2:0e2ef1edf01b 306 }
destinyXfate 2:0e2ef1edf01b 307
destinyXfate 2:0e2ef1edf01b 308
destinyXfate 2:0e2ef1edf01b 309 #ifdef PNG_ERROR_NUMBERS_SUPPORTED
destinyXfate 2:0e2ef1edf01b 310 void PNGAPI
destinyXfate 2:0e2ef1edf01b 311 png_set_strip_error_numbers(png_structp png_ptr, png_uint_32 strip_mode)
destinyXfate 2:0e2ef1edf01b 312 {
destinyXfate 2:0e2ef1edf01b 313 if(png_ptr != NULL)
destinyXfate 2:0e2ef1edf01b 314 {
destinyXfate 2:0e2ef1edf01b 315 png_ptr->flags &=
destinyXfate 2:0e2ef1edf01b 316 ((~(PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))&strip_mode);
destinyXfate 2:0e2ef1edf01b 317 }
destinyXfate 2:0e2ef1edf01b 318 }
destinyXfate 2:0e2ef1edf01b 319 #endif
destinyXfate 2:0e2ef1edf01b 320 #endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */
destinyXfate 2:0e2ef1edf01b 321