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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 <CkStringBuilderW.h> #include <CkCompressionW.h> void ChilkatSample(void) { // This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. bool success; CkStringBuilderW sbCompressedBase64; CkCompressionW compress; compress.put_Algorithm(L"deflate"); compress.put_Charset(L"utf-8"); compress.put_EncodingMode(L"base64"); CkStringBuilderW sbIndex; int i; 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. sbIndex.Clear(); sbIndex.AppendInt(i); if (i == 0) { sbCompressedBase64.Append(compress.beginCompressStringENC(sbIndex.getAsString())); } else { sbCompressedBase64.Append(compress.moreCompressStringENC(sbIndex.getAsString())); } sbCompressedBase64.Append(compress.moreCompressStringENC(L": This is a line of data to be compressed...\r\n")); } // Flush any remaining output. sbCompressedBase64.Append(compress.endCompressStringENC()); wprintf(L"The base64 encoded compressed text:\n"); wprintf(L"%s\n",sbCompressedBase64.getAsString()); // Now decompress in one call: const wchar_t *originalText = compress.decompressStringENC(sbCompressedBase64.getAsString()); wprintf(L"%s\n",originalText); } |
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