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