4439     unsigned length, string2_begin;  in readChunk_tEXt()  local
4453     string2_begin = length + 1; /*skip keyword null terminator*/  in readChunk_tEXt()
4455     length = (unsigned)(chunkLength < string2_begin ? 0 : chunkLength - string2_begin);  in readChunk_tEXt()
4459     lodepng_memcpy(str, data + string2_begin, length);  in readChunk_tEXt()
4481   unsigned length, string2_begin;  in readChunk_zTXt()  local
4499     string2_begin = length + 2;  in readChunk_zTXt()
4500     if(string2_begin > chunkLength) CERROR_BREAK(error, 75); /*no null termination, corrupt?*/  in readChunk_zTXt()
4502     length = (unsigned)chunkLength - string2_begin;  in readChunk_zTXt()
4505     error = zlib_decompress(&str, &size, 0, &data[string2_begin],  in readChunk_zTXt()
4674   unsigned length, string2_begin;  in readChunk_iCCP()  local
4691   string2_begin = length + 2;  in readChunk_iCCP()
4692   if(string2_begin > chunkLength) return 75; /*no null termination, corrupt?*/  in readChunk_iCCP()
4694   length = (unsigned)chunkLength - string2_begin;  in readChunk_iCCP()
4697                           &data[string2_begin],  in readChunk_iCCP()