Function zip_write_block

src/burp/mvol.cpp:492–555

}

static void zip_write_block(BurpGlobals* tdgbl, const UCHAR* buffer, FB_SIZE_T buffer_length, bool flash)
{
	if (!tdgbl->gbl_sw_zip)
	{
		crypt_write_block(tdgbl, buffer, buffer_length, flash);
		return;
	}

#ifdef HAVE_ZLIB_H
	z_stream& strm = tdgbl->gbl_stream;
	strm.avail_in = buffer_length;
	strm.next_in = (Bytef*)buffer;
	UCHAR* compressed = tdgbl->gbl_decompress;

	if (!strm.next_out)
	{
		strm.avail_out = ZC_BUFSIZE;
		strm.next_out = (Bytef*)compressed;
	}

	bool expectMoreOut = flash;

	while (strm.avail_in || expectMoreOut)
	{
#ifdef COMPRESS_DEBUG
		fprintf(stderr, "Data to deflate %d port %p\n", strm.avail_in, port);
#if COMPRESS_DEBUG>1
		for (unsigned n = 0; n < strm.avail_in; ++n) fprintf(stderr, "%02x ", strm.next_in[n]);
		fprintf(stderr, "\n");
#endif
#endif
		int ret = zlib().deflate(&strm, flash ? Z_FULL_FLUSH : Z_NO_FLUSH);
		if (ret == Z_BUF_ERROR)
			ret = 0;
		if (ret != 0)
		{
#ifdef COMPRESS_DEBUG
			fprintf(stderr, "Deflate error %d\n", ret);
#endif
			BURP_error(380, true, SafeArg() << ret);
		}

#ifdef COMPRESS_DEBUG
		fprintf(stderr, "Deflated data %d\n", ZC_BUFSIZE - strm.avail_out);
#if COMPRESS_DEBUG>1
		for (unsigned n = 0; n < port->port_buff_size - strm.avail_out; ++n)
			fprintf(stderr, "%02x ", compressed[n]);
		fprintf(stderr, "\n");
#endif
#endif

		expectMoreOut = !strm.avail_out;
		if ((ZC_BUFSIZE != strm.avail_out) && (flash || !strm.avail_out))
		{
			crypt_write_block(tdgbl, compressed, ZC_BUFSIZE - strm.avail_out, flash);

			strm.avail_out = ZC_BUFSIZE;
			strm.next_out = (Bytef*)compressed;