2554    png_uint_32 prefix_length;  in png_handle_iTXt()  local
2597    for (prefix_length=0;  in png_handle_iTXt()
2598       prefix_length < length && buffer[prefix_length] != 0;  in png_handle_iTXt()
2599       ++prefix_length)  in png_handle_iTXt()
2603    if (prefix_length > 79 || prefix_length < 1)  in png_handle_iTXt()
2610    else if (prefix_length + 5 > length)  in png_handle_iTXt()
2613    else if (buffer[prefix_length+1] == 0 ||  in png_handle_iTXt()
2614       (buffer[prefix_length+1] == 1 &&  in png_handle_iTXt()
2615       buffer[prefix_length+2] == PNG_COMPRESSION_TYPE_BASE))  in png_handle_iTXt()
2617       int compressed = buffer[prefix_length+1] != 0;  in png_handle_iTXt()
2622       prefix_length += 3;  in png_handle_iTXt()
2623       language_offset = prefix_length;  in png_handle_iTXt()
2625       for (; prefix_length < length && buffer[prefix_length] != 0;  in png_handle_iTXt()
2626          ++prefix_length)  in png_handle_iTXt()
2630       translated_keyword_offset = ++prefix_length;  in png_handle_iTXt()
2632       for (; prefix_length < length && buffer[prefix_length] != 0;  in png_handle_iTXt()
2633          ++prefix_length)  in png_handle_iTXt()
2641       ++prefix_length;  in png_handle_iTXt()
2643       if (!compressed && prefix_length <= length)  in png_handle_iTXt()
2644          uncompressed_length = length - prefix_length;  in png_handle_iTXt()
2646       else if (compressed && prefix_length < length)  in png_handle_iTXt()
2654          if (png_decompress_chunk(png_ptr, length, prefix_length,  in png_handle_iTXt()
2669          buffer[uncompressed_length+prefix_length] = 0;  in png_handle_iTXt()
2680          text.text = (png_charp)buffer + prefix_length;  in png_handle_iTXt()