136 lines
2.5 KiB
C
136 lines
2.5 KiB
C
|
/*
|
||
|
|
* Lazy test for the case when the output size is known
|
||
|
|
*
|
||
|
|
* Author: Lasse Collin <lasse.collin@tukaani.org>
|
||
|
|
*
|
||
|
|
* This file has been put into the public domain.
|
||
|
|
* You can do whatever you want with this file.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <stdbool.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <string.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include "xz.h"
|
||
|
|
|
||
|
|
static uint8_t in[1];
|
||
|
|
static uint8_t out[BUFSIZ];
|
||
|
|
|
||
|
|
int main(int argc, char **argv)
|
||
|
|
{
|
||
|
|
struct xz_buf b;
|
||
|
|
struct xz_dec *s;
|
||
|
|
enum xz_ret ret;
|
||
|
|
const char *msg;
|
||
|
|
size_t uncomp_size;
|
||
|
|
|
||
|
|
if (argc != 2) {
|
||
|
|
fputs("Give uncompressed size as the argument", stderr);
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
uncomp_size = atoi(argv[1]);
|
||
|
|
|
||
|
|
xz_crc32_init();
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Support up to 64 MiB dictionary. The actually needed memory
|
||
|
|
* is allocated once the headers have been parsed.
|
||
|
|
*/
|
||
|
|
s = xz_dec_init(XZ_DYNALLOC, 1 << 26);
|
||
|
|
if (s == NULL) {
|
||
|
|
msg = "Memory allocation failed\n";
|
||
|
|
goto error;
|
||
|
|
}
|
||
|
|
|
||
|
|
b.in = in;
|
||
|
|
b.in_pos = 0;
|
||
|
|
b.in_size = 0;
|
||
|
|
b.out = out;
|
||
|
|
b.out_pos = 0;
|
||
|
|
b.out_size = uncomp_size < BUFSIZ ? uncomp_size : BUFSIZ;
|
||
|
|
|
||
|
|
while (true) {
|
||
|
|
if (b.in_pos == b.in_size) {
|
||
|
|
b.in_size = fread(in, 1, sizeof(in), stdin);
|
||
|
|
b.in_pos = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
ret = xz_dec_run(s, &b);
|
||
|
|
|
||
|
|
if (b.out_pos == sizeof(out)) {
|
||
|
|
if (fwrite(out, 1, b.out_pos, stdout) != b.out_pos) {
|
||
|
|
msg = "Write error\n";
|
||
|
|
goto error;
|
||
|
|
}
|
||
|
|
|
||
|
|
uncomp_size -= b.out_pos;
|
||
|
|
b.out_pos = 0;
|
||
|
|
b.out_size = uncomp_size < BUFSIZ
|
||
|
|
? uncomp_size : BUFSIZ;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (ret == XZ_OK)
|
||
|
|
continue;
|
||
|
|
|
||
|
|
#ifdef XZ_DEC_ANY_CHECK
|
||
|
|
if (ret == XZ_UNSUPPORTED_CHECK) {
|
||
|
|
fputs(argv[0], stderr);
|
||
|
|
fputs(": ", stderr);
|
||
|
|
fputs("Unsupported check; not verifying "
|
||
|
|
"file integrity\n", stderr);
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
if (uncomp_size != b.out_pos) {
|
||
|
|
msg = "Uncompressed size doesn't match\n";
|
||
|
|
goto error;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (fwrite(out, 1, b.out_pos, stdout) != b.out_pos
|
||
|
|
|| fclose(stdout)) {
|
||
|
|
msg = "Write error\n";
|
||
|
|
goto error;
|
||
|
|
}
|
||
|
|
|
||
|
|
switch (ret) {
|
||
|
|
case XZ_STREAM_END:
|
||
|
|
xz_dec_end(s);
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
case XZ_MEM_ERROR:
|
||
|
|
msg = "Memory allocation failed\n";
|
||
|
|
goto error;
|
||
|
|
|
||
|
|
case XZ_MEMLIMIT_ERROR:
|
||
|
|
msg = "Memory usage limit reached\n";
|
||
|
|
goto error;
|
||
|
|
|
||
|
|
case XZ_FORMAT_ERROR:
|
||
|
|
msg = "Not a .xz file\n";
|
||
|
|
goto error;
|
||
|
|
|
||
|
|
case XZ_OPTIONS_ERROR:
|
||
|
|
msg = "Unsupported options in the .xz headers\n";
|
||
|
|
goto error;
|
||
|
|
|
||
|
|
case XZ_DATA_ERROR:
|
||
|
|
case XZ_BUF_ERROR:
|
||
|
|
msg = "File is corrupt\n";
|
||
|
|
goto error;
|
||
|
|
|
||
|
|
default:
|
||
|
|
msg = "Bug!\n";
|
||
|
|
goto error;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
error:
|
||
|
|
xz_dec_end(s);
|
||
|
|
fputs(argv[0], stderr);
|
||
|
|
fputs(": ", stderr);
|
||
|
|
fputs(msg, stderr);
|
||
|
|
return 1;
|
||
|
|
}
|