プログラマ専用SNS ミクプラ

コード:

#include <stdio.h>
#include <stdlib.h>
#include <fstream>
#include <assert.h>
#include "lzma.h"

int main()
{
	std::ifstream ifs("main.cpp");
	std::ofstream ofs("main.xz");
	lzma_stream strm = LZMA_STREAM_INIT;

	lzma_ret ret = lzma_easy_encoder(&strm, 6, LZMA_CHECK_CRC64);
	assert(ret == LZMA_OK);


	lzma_action action = LZMA_RUN;
	do {
		static uint8_t inbuf[32];
		static uint8_t outbuf[32];
		ifs.read((char*)inbuf, sizeof(inbuf));
		strm.next_in = inbuf;
		strm.avail_in = (size_t)ifs.gcount();
		if (ifs.eof()) {
			action = LZMA_FINISH;
		}
		do {
			strm.next_out = outbuf;
			strm.avail_out = _countof(outbuf);
			ret = lzma_code(&strm, action);
			assert((ret == LZMA_OK) || (ret == LZMA_STREAM_END));
			ofs.write((char*)outbuf, (char*)strm.next_out-(char*)outbuf);

		} while (strm.avail_out == 0);
		assert(strm.avail_in == 0);
	} while (action != LZMA_FINISH);
	assert(ret == LZMA_STREAM_END);

	return 0;
}