+GBool DCTStream::readJFIFMarker() {
+ int length, i;
+ char buf[5];
+ int c;
+
+ length = read16();
+ length -= 2;
+ if (length >= 5) {
+ for (i = 0; i < 5; ++i) {
+ if ((c = str->getChar()) == EOF) {
+ error(getPos(), "Bad DCT APP0 marker");
+ return gFalse;
+ }
+ buf[i] = c;
+ }
+ length -= 5;
+ if (!memcmp(buf, "JFIF\0", 5)) {
+ gotJFIFMarker = gTrue;
+ }
+ }
+ while (length > 0) {
+ if (str->getChar() == EOF) {
+ error(getPos(), "Bad DCT APP0 marker");
+ return gFalse;
+ }
+ --length;
+ }
+ return gTrue;
+}
+