339     png_size_t prefix_size, png_size_t *newlength)  in png_decompress_chunk()  argument
342    if (prefix_size > chunklength)  in png_decompress_chunk()
346       prefix_size = 0; /* To delete everything */  in png_decompress_chunk()
352                 (png_bytep)(png_ptr->chunkdata + prefix_size),  in png_decompress_chunk()
353                 chunklength - prefix_size,  in png_decompress_chunk()
361           (prefix_size + expanded_size >= png_ptr->user_chunk_malloc_max - 1))  in png_decompress_chunk()
365           prefix_size + expanded_size >= PNG_USER_CHUNK_MALLOC_MAX - 1)  in png_decompress_chunk()
386          if (prefix_size + expanded_size > prefix_size &&  in png_decompress_chunk()
387              prefix_size + expanded_size < 0xffffffffU)  in png_decompress_chunk()
389              text = png_malloc_warn(png_ptr, prefix_size + expanded_size + 1);  in png_decompress_chunk()
394             png_memcpy(text, png_ptr->chunkdata, prefix_size);  in png_decompress_chunk()
396                 (png_bytep)(png_ptr->chunkdata + prefix_size),  in png_decompress_chunk()
397                 chunklength - prefix_size,  in png_decompress_chunk()
398                 (png_bytep)(text + prefix_size), expanded_size);  in png_decompress_chunk()
399             text[prefix_size + expanded_size] = 0; /* just in case */  in png_decompress_chunk()
405                *newlength = prefix_size + expanded_size;  in png_decompress_chunk()
437       png_charp text = png_malloc_warn(png_ptr, prefix_size + 1);  in png_decompress_chunk()
440          if (prefix_size > 0)  in png_decompress_chunk()
441             png_memcpy(text, png_ptr->chunkdata, prefix_size);  in png_decompress_chunk()
446          *(png_ptr->chunkdata + prefix_size) = 0x00;  in png_decompress_chunk()
451    *newlength = prefix_size;  in png_decompress_chunk()