C language uses zlib to implement gzip compression and gzip decompression of text characters

Many of the methods found on the network will lose characters when extracting the string, here is the workaround:

Http://stackoverflow.com/questions/21186535/compressing-decompressing-char-array-using-zlib-some-characters-missing

Based on this, the author modified a bit, because it is a beginner, only according to the compiler does not error the principle of modified a bit, can run

Open vc++6.0 new Console program, configure the Zdll.lib, put Zlib1.dll in the right place
The main program main.cpp is as follows
#include <string.h>#include<stdio.h>#include<stdlib.h>#include"Zlib.h"intMain () {Const Char*istream ="some foo kanji"; ULong Srclen= strlen (IStream) +1;//+1 for the trailing ' + 'ULong Destlen = Compressbound (Srclen);//should estimate size//needed for the bufferUnsignedChar* Ostream = (unsignedChar*)malloc(Destlen); intres = compress (Ostream, &destlen, (ConstUnsignedChar*) IStream, Srclen); //Destlen is now the size of actuall buffer needed for compression//You don ' t want to uncompress whole buffer later, just the used part  if(res = =z_buf_error) {printf ("Buffer was too small!\n"); return 1; }  if(res = =z_mem_error) {printf ("Not enough memory for compression!\n"); return 2; } unsignedChar*i2stream =ostream; Char* O2stream = (Char*)malloc(Srclen); ULong DestLen2= Destlen;//Destlen is the actual size of the compressed buffer  intDes = uncompress ((unsignedChar*) O2stream, &Srclen, I2stream, destLen2); printf ("%s\n", O2stream); return 0;}

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C language uses zlib to implement gzip compression and gzip decompression of text characters