1 files changed, 63 insertions, 0 deletions
diff --git a/ext/gd/gd_compat.c b/ext/gd/gd_compat.c
new file mode 100644
index 0000000000..dc6a95ae11
--- /dev/null
+++ b/ext/gd/gd_compat.c
@@ -0,0 +1,63 @@
+#include "php_config.h"
+
+#ifdef HAVE_GD_PNG
+/* needs to be first */
+# include <png.h>
+#endif
+
+#ifdef HAVE_GD_JPG
+# include <jpeglib.h>
+#endif
+
+#include "gd_compat.h"
+#include "php.h"
+
+#ifdef HAVE_GD_JPG
+int gdJpegGetVersionInt()
+{
+	return JPEG_LIB_VERSION;
+}
+
+const char * gdJpegGetVersionString()
+{
+	switch(JPEG_LIB_VERSION) {
+		case 62:
+			return "6b";
+			break;
+
+		case 70:
+			return "7";
+			break;
+
+		case 80:
+			return "8";
+			break;
+
+		default:
+			return "unknown";
+	}
+}
+#endif
+
+#ifdef HAVE_GD_PNG
+const char * gdPngGetVersionString()
+{
+	return PNG_LIBPNG_VER_STRING;
+}
+#endif
+
+int overflow2(int a, int b)
+{
+	TSRMLS_FETCH();
+
+	if(a <= 0 || b <= 0) {
+		php_error_docref(NULL TSRMLS_CC, E_WARNING, "gd warning: one parameter to a memory allocation multiplication is negative or zero, failing operation gracefully\n");
+		return 1;
+	}
+	if(a > INT_MAX / b) {
+		php_error_docref(NULL TSRMLS_CC, E_WARNING, "gd warning: product of memory allocation multiplication would exceed INT_MAX, failing operation gracefully\n");
+		return 1;
+	}
+	return 0;
+}
+