bool verifyJavaStringFormat(const StringPiece16& str) {
 const char16_t* c = str.begin();
 const char16_t* const end = str.end();

 size_t argCount = 0;
 bool nonpositional = false;
 while (c != end) {
 if (*c == u'%' && c + 1 < end) {
            c++;

 if (*c == u'%') {
                c++;
 continue;
 }

            argCount++;

 size_t numDigits = consumeDigits(c, end);
 if (numDigits > 0) {
                c += numDigits;
 if (c != end && *c != u'$') {
                    nonpositional = true;
 }
 } else if (*c == u'<') {
                nonpositional = true;

                c++;

 if (c != end && *c == u'$') {
                    c++;
 }
 } else {
                nonpositional = true;
 }

 while (c != end && (*c == u'-' ||
 *c == u'#' ||
 *c == u'+' ||
 *c == u' ' ||
 *c == u',' ||
 *c == u'(' ||
 (*c >= u'0' && *c <= '9'))) {
                c++;
 }

 /*
             * This is a shortcut to detect strings that are going to Time.format()
             * instead of String.format()
             *
             * Comparison of String.format() and Time.format() args:
             *
             * String: ABC E GH  ST X abcdefgh  nost x
             *   Time:    DEFGHKMS W Za  d   hkm  s w yz
             *
             * Therefore we know it's definitely Time if we have:
             *     DFKMWZkmwyz
             */
 if (c != end) {
 switch (*c) {
 case 'D':
 case 'F':
 case 'K':
 case 'M':
 case 'W':
 case 'Z':
 case 'k':
 case 'm':
 case 'w':
 case 'y':
 case 'z':
 return true;
 }
 }
 }

 if (c != end) {
            c++;
 }
 }

 if (argCount > 1 && nonpositional) {
 return false;
 }
 return true;
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.