root/ext/gd/gd_compat.c

DEFINITIONS

1. gdJpegGetVersionInt
2. gdJpegGetVersionString
3. gdPngGetVersionString
4. overflow2

   1 #ifdef HAVE_CONFIG_H
   2 #include "config.h"
   3 #else
   4 #include "php_config.h"
   5 #endif
   6 
   7 #ifdef HAVE_GD_PNG
   8 /* needs to be first */
   9 # include <png.h>
  10 #endif
  11 
  12 #ifdef HAVE_GD_JPG
  13 # include <jpeglib.h>
  14 #endif
  15 
  16 #include "gd_compat.h"
  17 #include "php.h"
  18 
  19 #ifdef HAVE_GD_JPG
  20 int gdJpegGetVersionInt()
  21 {
  22         return JPEG_LIB_VERSION;
  23 }
  24 
  25 const char * gdJpegGetVersionString()
  26 {
  27         switch(JPEG_LIB_VERSION) {
  28                 case 62:
  29                         return "6b";
  30                         break;
  31 
  32                 case 70:
  33                         return "7";
  34                         break;
  35 
  36                 case 80:
  37                         return "8";
  38                         break;
  39 
  40                 default:
  41                         return "unknown";
  42         }
  43 }
  44 #endif
  45 
  46 #ifdef HAVE_GD_PNG
  47 const char * gdPngGetVersionString()
  48 {
  49         return PNG_LIBPNG_VER_STRING;
  50 }
  51 #endif
  52 
  53 int overflow2(int a, int b)
  54 {
  55 
  56         if(a <= 0 || b <= 0) {
  57                 php_error_docref(NULL, E_WARNING, "gd warning: one parameter to a memory allocation multiplication is negative or zero, failing operation gracefully\n");
  58                 return 1;
  59         }
  60         if(a > INT_MAX / b) {
  61                 php_error_docref(NULL, E_WARNING, "gd warning: product of memory allocation multiplication would exceed INT_MAX, failing operation gracefully\n");
  62                 return 1;
  63         }
  64         return 0;
  65 }
  66