2615    png_uint_32 prefix_length;  in png_handle_iTXt()  local
2658    for (prefix_length=0;  in png_handle_iTXt()
2659       prefix_length < length && buffer[prefix_length] != 0;  in png_handle_iTXt()
2660       ++prefix_length)  in png_handle_iTXt()
2664    if (prefix_length > 79 || prefix_length < 1)  in png_handle_iTXt()
2671    else if (prefix_length + 5 > length)  in png_handle_iTXt()
2674    else if (buffer[prefix_length+1] == 0 ||  in png_handle_iTXt()
2675       (buffer[prefix_length+1] == 1 &&  in png_handle_iTXt()
2676       buffer[prefix_length+2] == PNG_COMPRESSION_TYPE_BASE))  in png_handle_iTXt()
2678       int compressed = buffer[prefix_length+1] != 0;  in png_handle_iTXt()
2683       prefix_length += 3;  in png_handle_iTXt()
2684       language_offset = prefix_length;  in png_handle_iTXt()
2686       for (; prefix_length < length && buffer[prefix_length] != 0;  in png_handle_iTXt()
2687          ++prefix_length)  in png_handle_iTXt()
2691       translated_keyword_offset = ++prefix_length;  in png_handle_iTXt()
2693       for (; prefix_length < length && buffer[prefix_length] != 0;  in png_handle_iTXt()
2694          ++prefix_length)  in png_handle_iTXt()
2702       ++prefix_length;  in png_handle_iTXt()
2704       if (compressed == 0 && prefix_length <= length)  in png_handle_iTXt()
2705          uncompressed_length = length - prefix_length;  in png_handle_iTXt()
2707       else if (compressed != 0 && prefix_length < length)  in png_handle_iTXt()
2715          if (png_decompress_chunk(png_ptr, length, prefix_length,  in png_handle_iTXt()
2730          buffer[uncompressed_length+prefix_length] = 0;  in png_handle_iTXt()
2741          text.text = (png_charp)buffer + prefix_length;  in png_handle_iTXt()