#include <lzma.h>
#include <stdio.h>
#include <linux/compiler.h>
#include "util.h"
#include "debug.h"

#define BUFSIZE 8192

static const char *lzma_strerror(lzma_ret ret)
{
	switch ((int) ret) {
	case LZMA_MEM_ERROR:
		return "Memory allocation failed";
	case LZMA_OPTIONS_ERROR:
		return "Unsupported decompressor flags";
	case LZMA_FORMAT_ERROR:
		return "The input is not in the .xz format";
	case LZMA_DATA_ERROR:
		return "Compressed file is corrupt";
	case LZMA_BUF_ERROR:
		return "Compressed file is truncated or otherwise corrupt";
	default:
		return "Unknown error, possibly a bug";
	}
}

int lzma_decompress_to_file(const char *input, int output_fd)
{
	lzma_action action = LZMA_RUN;
	lzma_stream strm   = LZMA_STREAM_INIT;
	lzma_ret ret;
	int err = -1;

	u8 buf_in[BUFSIZE];
	u8 buf_out[BUFSIZE];
	FILE *infile;

	infile = fopen(input, "rb");
	if (!infile) {
		pr_err("lzma: fopen failed on %s: '%s'\n",
		       input, strerror(errno));
		return -1;
	}

	ret = lzma_stream_decoder(&strm, UINT64_MAX, LZMA_CONCATENATED);
	if (ret != LZMA_OK) {
		pr_err("lzma: lzma_stream_decoder failed %s (%d)\n",
			lzma_strerror(ret), ret);
		goto err_fclose;
	}

	strm.next_in   = NULL;
	strm.avail_in  = 0;
	strm.next_out  = buf_out;
	strm.avail_out = sizeof(buf_out);

	while (1) {
		if (strm.avail_in == 0 && !feof(infile)) {
			strm.next_in  = buf_in;
			strm.avail_in = fread(buf_in, 1, sizeof(buf_in), infile);

			if (ferror(infile)) {
				pr_err("lzma: read error: %s\n", strerror(errno));
				goto err_fclose;
			}

			if (feof(infile))
				action = LZMA_FINISH;
		}

		ret = lzma_code(&strm, action);

		if (strm.avail_out == 0 || ret == LZMA_STREAM_END) {
			ssize_t write_size = sizeof(buf_out) - strm.avail_out;

			if (writen(output_fd, buf_out, write_size) != write_size) {
				pr_err("lzma: write error: %s\n", strerror(errno));
				goto err_fclose;
			}

			strm.next_out  = buf_out;
			strm.avail_out = sizeof(buf_out);
		}

		if (ret != LZMA_OK) {
			if (ret == LZMA_STREAM_END)
				break;

			pr_err("lzma: failed %s\n", lzma_strerror(ret));
			goto err_fclose;
		}
	}

	err = 0;
err_fclose:
	fclose(infile);
	return err;
}
e82c1'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/net/qrtr'>
<input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='d5e582523aead22cd1fd62aee232b6f9e4ce82c1'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?h=nds-private-remove&amp;id=d5e582523aead22cd1fd62aee232b6f9e4ce82c1'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/net?h=nds-private-remove&amp;id=d5e582523aead22cd1fd62aee232b6f9e4ce82c1'>net</a>/<a href='/cgit.cgi/linux/net-next.git/log/net/qrtr?h=nds-private-remove&amp;id=d5e582523aead22cd1fd62aee232b6f9e4ce82c1'>qrtr</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/net/qrtr?h=nds-private-remove&amp;id=d5e582523aead22cd1fd62aee232b6f9e4ce82c1&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>