压缩API的原型是: size_t ZSTD_compress2(ZSTD_CCtx* cctx, void* dst, size_t dstCapacity, const void* src, size_t srcSize) 下面给出zstd并行压缩的示例demo,通过ZSTD_CCtx_setParameter设置线程数为3,即指定宏ZSTD_c_nbWorkers为3,通过ZSTD_compress2压缩相关文本。另外,为了展示zstd确实使用了多线程,...
com_space_size=ZSTD_compressBound(peppa_pig_text_size);gettimeofday(&st,NULL);while(1) { com_ptr = (char*)malloc(com_space_size); com_size =ZSTD_compress(com_ptr, com_space_size, peppa_pig_buf, peppa_pig_text_size, ZSTD_fast);free(com_ptr); cnt++;gettimeofday(&et,NULL);if(et....
[blockSize+ZSTD_compressBound(blockSize)];while(inputFile){inputFile.read(inputBuffer,blockSize);constsize_t bytesRead=inputFile.gcount();constsize_t compressedSize=ZSTD_compressCCtx(cctx,outputBuffer,blockSize+ZSTD_compressBound(blockSize),inputBuffer,bytesRead,1);outputFile.write(outputBuffer,...
< maximum compressed size in worst case scenario */ZSTDLIB_APIsize_tZSTD_compressBound(size_tsrcSize); 压缩流程: 使用ZSTD_compressBound获取最大压缩缓冲区大小,然后申请缓冲区; 使用ZSTD_compress进行压缩 //可以设定压缩等级 1 up to ZSTD_maxCLevel()size_t dstSize = ZSTD_compress(pDest, szBufSize...
toUtf8(); size_t compressedSize = ZSTD_compressBound(input.size()); QByteArray compressed(compressedSize, 0); size_t compressedLength = ZSTD_compress(compressed.data(), compressedSize, input.constData(), input.size(), ZSTD_fast); compressed.resize(compressedLength); return compressed; } 3...
的身影,示例代码: ```c static void compress_orDie(const char* fname, const char* oname) { size_t fSize; void* const fBuff = mallocAndLoadFile_orDie(fname, &fSize); size_t const cBuffSize = ZSTD_compressBound(fSize); void* const cBuff = malloc_orDie(cBuffSize); /* Compress....
int Util::CompressString(const string& src, string& dst, int compressionlevel) { size_t const cBuffSize = ZSTD_compressBound(src.size());dst.resize(cBuffSize);auto dstp = const_cast<void*>(static_cast<const void*>(dst.c_str()));auto srcp = static_cast<const void*>(src.c_str(...
* NOTE: Providing `dstCapacity >= ZSTD_compressBound(srcSize)` guarantees that zstd will have * enough space to successfully compress the data, though it is possible it fails for other reasons. * @return : compressed size written into `dst` (<= `dstCapacity), ...
// If the buffer is too small, it will be reallocated, resized, and returned by the function // If dst is nil, this will allocate the worst case size (CompressBound(src)) Compress(dst, src []byte) ([]byte, error)// CompressLevel is the same as Compress but you can pass another ...
s)32return{};33returnbuf;34}3536intmain()37{38//1. 读取测试数据到内存39auto input = read_file("test.bmp");40//2. 预估输出缓冲区大小41auto bufSize =ZSTD_compressBound(input.size());42//3. 创建输出缓冲区43buffer output(bufSize,0);44//4. 设置压缩参数45auto level =19;//ZSTD 多...