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(C) Compress BytesDemonstrates how to compress binary data.
#include <C_CkFileAccess.h> #include <C_CkByteData.h> #include <C_CkCompression.h> void ChilkatSample(void) { HCkFileAccess fac; HCkByteData fileBytes; HCkCompression compress; HCkByteData compressedBytes; BOOL success; // This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. fac = CkFileAccess_Create(); fileBytes = CkByteData_Create(); success = CkFileAccess_ReadEntireFile(fac,"qa_data/bmp/big.bmp",fileBytes); if (CkFileAccess_getLastMethodSuccess(fac) != TRUE) { printf("%s\n",CkFileAccess_lastErrorText(fac)); CkFileAccess_Dispose(fac); CkByteData_Dispose(fileBytes); return; } compress = CkCompression_Create(); CkCompression_putAlgorithm(compress,"deflate"); compressedBytes = CkByteData_Create(); success = CkCompression_CompressBytes(compress,fileBytes,compressedBytes); if (CkCompression_getLastMethodSuccess(compress) != TRUE) { printf("%s\n",CkCompression_lastErrorText(compress)); CkFileAccess_Dispose(fac); CkByteData_Dispose(fileBytes); CkCompression_Dispose(compress); CkByteData_Dispose(compressedBytes); return; } success = CkFileAccess_WriteEntireFile(fac,"qa_output/compressedBmp.dat",compressedBytes); if (CkFileAccess_getLastMethodSuccess(fac) != TRUE) { printf("%s\n",CkFileAccess_lastErrorText(fac)); CkFileAccess_Dispose(fac); CkByteData_Dispose(fileBytes); CkCompression_Dispose(compress); CkByteData_Dispose(compressedBytes); return; } CkFileAccess_Dispose(fac); CkByteData_Dispose(fileBytes); CkCompression_Dispose(compress); CkByteData_Dispose(compressedBytes); } |
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