Repository navigation
Expand file tree
/
Copy pathlongmatch.c
More file actions
101 lines (97 loc) · 3.02 KB
/
Copy pathlongmatch.c
File metadata and controls
101 lines (97 loc) · 3.02 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
8000
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
/*
* Copyright (c) Yann Collet, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under both the BSD-style license (found in the
* LICENSE file in the root directory of this source tree) and the GPLv2 (found
* in the COPYING file in the root directory of this source tree).
* You may select, at your option, one of the above-listed licenses.
*/
#include <stdio.h>
#include <stddef.h>
#include <stdlib.h>
#include <stdint.h>
#include "mem.h"
#define ZSTD_STATIC_LINKING_ONLY
#include "zstd.h"
static int
compress(ZSTD_CStream *ctx, ZSTD_outBuffer out, const void *data, size_t size)
{
ZSTD_inBuffer in = { data, size, 0 };
while (in.pos < in.size) {
ZSTD_outBuffer tmp = out;
const size_t rc = ZSTD_compressStream(ctx, &tmp, &in);
if (ZSTD_isError(rc)) return 1;
}
{ ZSTD_outBuffer tmp = out;
const size_t rc = ZSTD_flushStream(ctx, &tmp);
if (rc != 0) { return 1; }
}
return 0;
}
int main(int argc, const char** argv)
{
ZSTD_CStream* ctx;
ZSTD_parameters params;
size_t rc;
unsigned windowLog;
(void)argc;
(void)argv;
/* Create stream */
ctx = ZSTD_createCStream();
if (!ctx) { return 1; }
/* Set parameters */
memset(¶ms, 0, sizeof(params));
params.cParams.windowLog = 18;
params.cParams.chainLog = 13;
params.cParams.hashLog = 14;
params.cParams.searchLog = 1;
params.cParams.minMatch = 7;
params.cParams.targetLength = 16;
params.cParams.strategy = ZSTD_fast;
windowLog = params.cParams.windowLog;
/* Initialize stream */
rc = ZSTD_initCStream_advanced(ctx, NULL, 0, params, 0);
if (ZSTD_isError(rc)) { return 2; }
{
U64 compressed = 0;
const U64 toCompress = ((U64)1) << 33;
const size_t size = 1 << windowLog;
size_t pos = 0;
char *srcBuffer = (char*) malloc(1 << windowLog);
char *dstBuffer = (char*) malloc(ZSTD_compressBound(1 << windowLog));
ZSTD_outBuffer out = { dstBuffer, ZSTD_compressBound(1 << windowLog), 0 };
const char match[] = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
const size_t randomData = (1 << windowLog) - 2*sizeof(match);
size_t i;
printf("\n === Long Match Test === \n");
printf("Creating random data to produce long matches \n");
for (i = 0; i < sizeof(match); ++i) {
srcBuffer[i] = match[i];
}
for (i = 0; i < randomData; ++i) {
srcBuffer[sizeof(match) + i] = (char)(rand() & 0xFF);
}
for (i = 0; i < sizeof(match); ++i) {
srcBuffer[sizeof(match) + randomData + i] = match[i];
}
printf("Compressing, trying to generate a segfault \n");
if (compress(ctx, out, srcBuffer, size)) {
return 1;
}
compressed += size;
while (compressed < toCompress) {
const size_t block = rand() % (size - pos + 1);
if (pos == size) { pos = 0; }
if (compress(ctx, out, srcBuffer + pos, block)) {
return 1;
}
pos += block;
compressed += block;
}
printf("Compression completed successfully (no error triggered)\n");
free(srcBuffer);
free(dstBuffer);
}
return 0;
}