zlib庫的編譯及使用
* 打開網址http://zlib.net/ 下載zlib源碼，
* 解壓壓縮包，進入目錄：C:\Users\Administrator\Desktop\zlib-1.2.11\zlib-1.2.11\contrib\vstudio\vc12，打開zlibvc.sln工程。
32位編譯有以下問題：
** match686.obj : error LNK2026: 模塊對於 SAFESEH 映像是不安全的。
** 解決：
** 使用zlib開源庫在VS2013中開發，但是在使用uncompress函數進行解壓縮過程中遇到了內存崩潰現象。
** 解決：
用c編譯方式取代彙編方式，在zlib源碼的zlibvc工程中，分爲2步：
1.工程屬性->預處理器，去掉 ASMINF 定義，這樣就可以屏蔽掉彙編模塊：
2.
打開zlib-1.2.11\contrib\masmx86下面的彙編文件inffas32.asm，將裏面_inflate_fast全部替換成其他任意函數名，再次編譯。
修改爲：_inflate_fast1
64位編譯有以下問題：
** 解決
修改爲：cd ..\..\masmx64bld_ml64.bat
*** 庫目錄修改：
32位導出的函數名稱與64位導出的函數名稱有區別，這可能是是使用zlib 的lib庫進行靜態連接時,32位需要追加ZLIB_WINAPI
否則會報error LNK2019 錯誤：
32位導出的函數名稱與64位導出的函數名稱有區別如下圖：
32位：
64位:
*********zlib庫的使用:
工程配置，32位工程必須追加加入宏定義 :ZLIB_WINAPI，64位隨意。
***** 測試代碼如下：
// zlib.cpp : 定義控制檯應用程序的入口點。
//
#include "stdafx.h"
#include <stdio.h>
#include <stdlib.h>
#include <iostream>
#include <windows.h>
//extern "C"{
#include "zlib.h"
//}
//#pragma comment(lib, "32lib/zlibwapi.lib")
//------------------------------------------------------------------------測試函數---------------------------------------------------------------------------------------------------------
// 包頭長度大約爲192個字節
int g_nPackHead[] = {
10, 62, 84, 74, 96, 70, 77, 149, 237, 164, 71, 72, 229, 245, 233, 47, 101, 155, 252, 189, 94, 69, 9, 6, 72, 69, 241, 182, 21, 70, 216, 101, 150, 247, 133, 81, 146, 66, 31, 35, 106, 53, 133
, 66, 248, 124, 16, 224, 122, 80, 28, 61, 8, 193, 124, 122, 79, 111, 4, 88, 98, 1, 79, 111, 0, 8, 0, 5, 54, 198, 32, 239, 45, 234, 2, 182, 47, 188, 79, 111, 0, 0, 16, 225, 106, 69
, 53, 1, 146, 72, 81, 82, 84, 83, 16, 235, 10, 72, 5, 4, 76, 90, 146, 181, 28, 31, 153, 222, 249, 16, 226, 37, 3, 18, 249, 82, 84, 83, 16, 249, 241, 76, 120, 2, 243, 32, 239, 49, 33
, 46, 115, 125, 78, 0, 0, 1, 37, 16, 232, 33, 4, 16, 216, 48, 56, 56, 56, 16, 237, 164, 81, 37, 82, 21, 199
, 111, 2, 248, 98, 3, 122, 80, 28, 61, 8, 193, 72, 5, 53, 224, 122, 80, 68, 61, 8, 193, 124, 122, 79, 111, 4, 88, 98, 1, 79, 111
};
const char* p5Price = "3215565665";
const char * pLastPrice = "123%06d+1811%d;";
int g_ncin = 0;
int g_nLevel = 0;
#define TEMP_MAX 65536
//#define TEMP_MAX 200
#if 1
int _tmain(int argc, _TCHAR* argv[])
{
std::cout << "輸入:\t 0.訂閱一條最新價 \t1.訂閱五檔行情\t2.訂閱五檔行情/一條最新價\t3.訂閱五檔行情/2條最新價...以此類推，最大值爲500,默認值20" << std::endl;
std::cout << "輸入壓縮等級(1-9):\t 1最小壓縮，9爲最大壓縮，默認5" << std::endl;
std::cout << "輸入格式:\t條數+壓縮等級，如251,25條行情，1級壓縮" << std::endl;
//unsigned char* testchar = new unsigned char[65536];
unsigned char testchar[TEMP_MAX];
unsigned char testchar1[TEMP_MAX];
while (true)
{
g_ncin = 1;
g_nLevel = 5;
memset(testchar, 0x00, TEMP_MAX);
unsigned long nHeadSize = (sizeof(g_nPackHead) / sizeof(int));
unsigned long Offset = nHeadSize;
for (unsigned long i = 0; i < nHeadSize; i++)
{
testchar[i] = g_nPackHead[i];
}
int indata;
std::cin >> indata;
g_ncin = indata / 10;
g_nLevel = indata % 10;
std::cout << "............................................................................................" << std::endl;
if ((g_ncin < 0) || (g_ncin >500))
{
g_ncin = 20;
}
if ((g_nLevel < 0) || (g_nLevel > 9))
{
g_nLevel = 5;
}
if (0 == g_ncin)
{
strcat_s((char*)(testchar + Offset), 256, p5Price);
Offset += strlen(p5Price);
}
else
{
for (int i = 0; i <= g_ncin - 1; i++)
{
char x[65536];
sprintf_s(x, sizeof(x), pLastPrice, i + 1, i + 2);
strcat_s((char*)(testchar + Offset), 128, x);
Offset += strlen(x);
}
// 追加五檔行情
if (g_ncin > 1)
{
strcat_s((char*)(testchar + Offset), 256, p5Price);
Offset += strlen(p5Price);
}
}
unsigned long len = Offset;
printf("壓縮前src_len=%lu\tsrc: %s\n", Offset, (char*)(testchar + nHeadSize));
unsigned char dest[TEMP_MAX]; memset(dest, 0x00, TEMP_MAX);
unsigned long destLen = TEMP_MAX;
//int tt = GetTickCount();
//const int count = 10 * 100 * 100;
//for (int t = 0; t < count; t++)
//{
destLen = TEMP_MAX;
memset(dest, 0x00, sizeof(dest));
//壓縮
//compressBound(len);
//功能和compress函數一樣,多了一個參數可以指定壓縮質量和壓縮數度之間的關係(1-9)。要想得到高的壓縮比就要多花時間
if (Z_OK == compress2(dest, &destLen, testchar, len, g_nLevel))
{
printf("壓縮後dest_len=%d\t dest: %s\n", destLen, dest);
}
else
{
printf("壓縮失敗\n");
}
//}
//printf("%d只股票%d次數耗時耗時======= %ld ms\n\n", g_ncin,count,GetTickCount() - tt);
memset(testchar1, 0x00, sizeof(testchar1));
unsigned long src_len = TEMP_MAX;
//解壓縮
if (Z_OK == uncompress2(testchar1, &src_len, dest, &destLen))
//if (Z_OK)
//if (Uncompress(testchar, &src_len, dest, destLen) == 0)
{
printf("解壓後src_len=%d\tsrc: %s\n", src_len, (char*)(testchar1 + nHeadSize));
}
else
{
printf("解壓縮失敗\n");
}
int r = memcmp(testchar, testchar1, src_len);
if (0 == r)
{
printf("destLen=%d\t srclen=%d\t 壓縮率%f%%\n\n", destLen, src_len, (double)(destLen * 100) / (double)(src_len));
}
else
{
printf("解壓縮後的數據與原數據不一致\n\n");
}
}
system("pause");
return 0;
}
#else
int _tmain(int argc, _TCHAR* argv[])
{
/*原始數據*/
unsigned char strsrc[] = "這些是測試數據。123456789 abcdefghigklmnopqrstuvwxyz\n\t\0abcdefghijklmnopqrstuvwxyz\n"; //包含\0字符
unsigned char buf[1024] = {0};
unsigned char strdst[1024] = {0};
unsigned long srclen = sizeof(strsrc);
unsigned long buflen = sizeof(buf);
unsigned long dstlen = sizeof(strdst);
int i;
// FILE * fp;
printf("源串:");
for (i = 0; i < srclen; ++i)
{
printf("%c", strsrc[i]);
}
printf("原串長度爲:%ld\n", srclen);
printf("字符串預計算長度爲:%ld\n", compressBound(srclen));
//壓縮
//compress(buf, &buflen, strsrc, srclen);
int ret = compress2(buf, &buflen, strsrc, srclen,9);
printf("壓縮後實際長度爲:%ld\n", buflen);
//解壓縮
uncompress(strdst, &dstlen, buf, buflen);
printf("目的串:");
for (i = 0; i < dstlen; ++i)
{
printf("%c", strdst[i]);
}
return 0;
}
#endif