mirror of
https://github.com/facebook/zstd.git
synced 2025-11-04 00:02:59 -05:00
a494308ae9
* Switch to yearless copyright per FB policy * Fix up SPDX-License-Identifier lines in `contrib/linux-kernel` sources * Add zstd copyright/license header to the `contrib/linux-kernel` sources * Update the `tests/test-license.py` to check for yearless copyright * Improvements to `tests/test-license.py` * Check `contrib/linux-kernel` in `tests/test-license.py`
102 lines
3.0 KiB
C
102 lines
3.0 KiB
C
/*
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* Copyright (c) Yann Collet, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under both the BSD-style license (found in the
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* LICENSE file in the root directory of this source tree) and the GPLv2 (found
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* in the COPYING file in the root directory of this source tree).
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* You may select, at your option, one of the above-listed licenses.
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*/
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#include <stdio.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include "mem.h"
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#define ZSTD_STATIC_LINKING_ONLY
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#include "zstd.h"
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static int
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compress(ZSTD_CStream *ctx, ZSTD_outBuffer out, const void *data, size_t size)
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{
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ZSTD_inBuffer in = { data, size, 0 };
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while (in.pos < in.size) {
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ZSTD_outBuffer tmp = out;
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const size_t rc = ZSTD_compressStream(ctx, &tmp, &in);
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if (ZSTD_isError(rc)) return 1;
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}
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{ ZSTD_outBuffer tmp = out;
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const size_t rc = ZSTD_flushStream(ctx, &tmp);
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if (rc != 0) { return 1; }
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}
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return 0;
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}
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int main(int argc, const char** argv)
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{
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ZSTD_CStream* ctx;
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ZSTD_parameters params;
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size_t rc;
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unsigned windowLog;
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(void)argc;
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(void)argv;
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/* Create stream */
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ctx = ZSTD_createCStream();
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if (!ctx) { return 1; }
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/* Set parameters */
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memset(¶ms, 0, sizeof(params));
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params.cParams.windowLog = 18;
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params.cParams.chainLog = 13;
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params.cParams.hashLog = 14;
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params.cParams.searchLog = 1;
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params.cParams.minMatch = 7;
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params.cParams.targetLength = 16;
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params.cParams.strategy = ZSTD_fast;
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windowLog = params.cParams.windowLog;
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/* Initialize stream */
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rc = ZSTD_initCStream_advanced(ctx, NULL, 0, params, 0);
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if (ZSTD_isError(rc)) { return 2; }
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{
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U64 compressed = 0;
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const U64 toCompress = ((U64)1) << 33;
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const size_t size = 1 << windowLog;
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size_t pos = 0;
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char *srcBuffer = (char*) malloc(1 << windowLog);
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char *dstBuffer = (char*) malloc(ZSTD_compressBound(1 << windowLog));
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ZSTD_outBuffer out = { dstBuffer, ZSTD_compressBound(1 << windowLog), 0 };
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const char match[] = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
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const size_t randomData = (1 << windowLog) - 2*sizeof(match);
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size_t i;
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printf("\n === Long Match Test === \n");
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printf("Creating random data to produce long matches \n");
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for (i = 0; i < sizeof(match); ++i) {
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srcBuffer[i] = match[i];
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}
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for (i = 0; i < randomData; ++i) {
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srcBuffer[sizeof(match) + i] = (char)(rand() & 0xFF);
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}
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for (i = 0; i < sizeof(match); ++i) {
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srcBuffer[sizeof(match) + randomData + i] = match[i];
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}
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printf("Compressing, trying to generate a segfault \n");
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if (compress(ctx, out, srcBuffer, size)) {
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return 1;
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}
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compressed += size;
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while (compressed < toCompress) {
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const size_t block = rand() % (size - pos + 1);
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if (pos == size) { pos = 0; }
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if (compress(ctx, out, srcBuffer + pos, block)) {
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return 1;
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}
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pos += block;
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compressed += block;
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}
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printf("Compression completed successfully (no error triggered)\n");
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free(srcBuffer);
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free(dstBuffer);
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}
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return 0;
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}
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