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(Unicode C) Compress String Feed to Base64This example receives incoming text data in chunks, compresses as a stream, and accumulates the compressed data in base64. The purpose is to demonstrate the BeginCompressStringENC, MoreCompressStringENC, and EndCompressStringENC methods.
#include <C_CkStringBuilderW.h> #include <C_CkCompressionW.h> void ChilkatSample(void) { BOOL success; HCkStringBuilderW sbCompressedBase64; HCkCompressionW compress; HCkStringBuilderW sbIndex; int i; const wchar_t *originalText; // This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. sbCompressedBase64 = CkStringBuilderW_Create(); compress = CkCompressionW_Create(); CkCompressionW_putAlgorithm(compress,L"deflate"); CkCompressionW_putCharset(compress,L"utf-8"); CkCompressionW_putEncodingMode(compress,L"base64"); sbIndex = CkStringBuilderW_Create(); for (i = 0; i <= 24; i++) { // Note: It is possible (and normal) for a BeginCompress* or MoreCompress* method to return // an empty string (or 0 bytes). When this happens, the input data is not lost. It will be flushed // in a subsequent call. CkStringBuilderW_Clear(sbIndex); CkStringBuilderW_AppendInt(sbIndex,i); if (i == 0) { CkStringBuilderW_Append(sbCompressedBase64,CkCompressionW_beginCompressStringENC(compress,CkStringBuilderW_getAsString(sbIndex))); } else { CkStringBuilderW_Append(sbCompressedBase64,CkCompressionW_moreCompressStringENC(compress,CkStringBuilderW_getAsString(sbIndex))); } CkStringBuilderW_Append(sbCompressedBase64,CkCompressionW_moreCompressStringENC(compress,L": This is a line of data to be compressed...\r\n")); } // Flush any remaining output. CkStringBuilderW_Append(sbCompressedBase64,CkCompressionW_endCompressStringENC(compress)); wprintf(L"The base64 encoded compressed text:\n"); wprintf(L"%s\n",CkStringBuilderW_getAsString(sbCompressedBase64)); // Now decompress in one call: originalText = CkCompressionW_decompressStringENC(compress,CkStringBuilderW_getAsString(sbCompressedBase64)); wprintf(L"%s\n",originalText); CkStringBuilderW_Dispose(sbCompressedBase64); CkCompressionW_Dispose(compress); CkStringBuilderW_Dispose(sbIndex); } |
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