611     png_uint_32 chunklength, png_uint_32 prefix_size,  in png_decompress_chunk()  argument
633    if (limit >= prefix_size + (terminate != 0))  in png_decompress_chunk()
637       limit -= prefix_size + (terminate != 0);  in png_decompress_chunk()
647          png_uint_32 lzsize = chunklength - prefix_size;  in png_decompress_chunk()
650              /* input: */ png_ptr->read_buffer + prefix_size, &lzsize,  in png_decompress_chunk()
670                png_alloc_size_t buffer_size = prefix_size + new_size +  in png_decompress_chunk()
680                       png_ptr->read_buffer + prefix_size, &lzsize,  in png_decompress_chunk()
681                       text + prefix_size, newlength);  in png_decompress_chunk()
688                            text[prefix_size + *newlength] = 0;  in png_decompress_chunk()
690                         if (prefix_size > 0)  in png_decompress_chunk()
691                            memcpy(text, png_ptr->read_buffer, prefix_size);  in png_decompress_chunk()
726                       chunklength - prefix_size != lzsize)  in png_decompress_chunk()