通讯编程

开发平台：
Visual C++

testzlib.c：源码内容
							#include <stdio.h>
#include <stdlib.h>
#include <windows.h>
#include "zlib.h"
void MyDoMinus64(LARGE_INTEGER *R,LARGE_INTEGER A,LARGE_INTEGER B)
{
    R->HighPart = A.HighPart - B.HighPart;
    if (A.LowPart >= B.LowPart)
        R->LowPart = A.LowPart - B.LowPart;
    else
    {
        R->LowPart = A.LowPart - B.LowPart;
        R->HighPart --;
    }
}
#ifdef _M_X64
// see http://msdn2.microsoft.com/library/twchhe95(en-us,vs.80).aspx for __rdtsc
unsigned __int64 __rdtsc(void);
void BeginCountRdtsc(LARGE_INTEGER * pbeginTime64)
{
 //   printf("rdtsc = %I64xn",__rdtsc());
   pbeginTime64->QuadPart=__rdtsc();
}
LARGE_INTEGER GetResRdtsc(LARGE_INTEGER beginTime64,BOOL fComputeTimeQueryPerf)
{
    LARGE_INTEGER LIres;
    unsigned _int64 res=__rdtsc()-((unsigned _int64)(beginTime64.QuadPart));
    LIres.QuadPart=res;
   // printf("rdtsc = %I64xn",__rdtsc());
    return LIres;
}
#else
#ifdef _M_IX86
void myGetRDTSC32(LARGE_INTEGER * pbeginTime64)
{
    DWORD dwEdx,dwEax;
    _asm
    {
        rdtsc
        mov dwEax,eax
        mov dwEdx,edx
    }
    pbeginTime64->LowPart=dwEax;
    pbeginTime64->HighPart=dwEdx;
}
void BeginCountRdtsc(LARGE_INTEGER * pbeginTime64)
{
    myGetRDTSC32(pbeginTime64);
}
LARGE_INTEGER GetResRdtsc(LARGE_INTEGER beginTime64,BOOL fComputeTimeQueryPerf)
{
    LARGE_INTEGER LIres,endTime64;
    myGetRDTSC32(&endTime64);
    LIres.LowPart=LIres.HighPart=0;
    MyDoMinus64(&LIres,endTime64,beginTime64);
    return LIres;
}
#else
void myGetRDTSC32(LARGE_INTEGER * pbeginTime64)
{
}
void BeginCountRdtsc(LARGE_INTEGER * pbeginTime64)
{
}
LARGE_INTEGER GetResRdtsc(LARGE_INTEGER beginTime64,BOOL fComputeTimeQueryPerf)
{
    LARGE_INTEGER lr;
    lr.QuadPart=0;
    return lr;
}
#endif
#endif
void BeginCountPerfCounter(LARGE_INTEGER * pbeginTime64,BOOL fComputeTimeQueryPerf)
{
    if ((!fComputeTimeQueryPerf) || (!QueryPerformanceCounter(pbeginTime64)))
    {
        pbeginTime64->LowPart = GetTickCount();
        pbeginTime64->HighPart = 0;
    }
}
DWORD GetMsecSincePerfCounter(LARGE_INTEGER beginTime64,BOOL fComputeTimeQueryPerf)
{
    LARGE_INTEGER endTime64,ticksPerSecond,ticks;
    DWORDLONG ticksShifted,tickSecShifted;
    DWORD dwLog=16+0;
    DWORD dwRet;
    if ((!fComputeTimeQueryPerf) || (!QueryPerformanceCounter(&endTime64)))
        dwRet = (GetTickCount() - beginTime64.LowPart)*1;
    else
    {
        MyDoMinus64(&ticks,endTime64,beginTime64);
        QueryPerformanceFrequency(&ticksPerSecond);
    
        {
            ticksShifted = Int64ShrlMod32(*(DWORDLONG*)&ticks,dwLog);
            tickSecShifted = Int64ShrlMod32(*(DWORDLONG*)&ticksPerSecond,dwLog);
        
        } 
        dwRet = (DWORD)((((DWORD)ticksShifted)*1000)/(DWORD)(tickSecShifted));
        dwRet *=1;
    }
    return dwRet;
}
int ReadFileMemory(const char* filename,long* plFileSize,void** pFilePtr)
{
    FILE* stream;
    void* ptr;
    int retVal=1;
    stream=fopen(filename, "rb");
    if (stream==NULL)
        return 0;
    fseek(stream,0,SEEK_END);
    *plFileSize=ftell(stream);
    fseek(stream,0,SEEK_SET);
    ptr=malloc((*plFileSize)+1);
    if (ptr==NULL)
        retVal=0;
    else
    {
        if (fread(ptr, 1, *plFileSize,stream) != (*plFileSize))
            retVal=0;
    }
    fclose(stream);
    *pFilePtr=ptr;
    return retVal;
}
int main(int argc, char *argv[])
{
    int BlockSizeCompress=0x8000;
    int BlockSizeUncompress=0x8000;
    int cprLevel=Z_DEFAULT_COMPRESSION ;
    long lFileSize;
    unsigned char* FilePtr;
    long lBufferSizeCpr;
    long lBufferSizeUncpr;
    long lCompressedSize=0;
    unsigned char* CprPtr;
    unsigned char* UncprPtr;
    long lSizeCpr,lSizeUncpr;
    DWORD dwGetTick,dwMsecQP;
    LARGE_INTEGER li_qp,li_rdtsc,dwResRdtsc;
    if (argc<=1)
    {
        printf("run TestZlib <File> [BlockSizeCompress] [BlockSizeUncompress] [compres. level]n");
        return 0;
    }
    if (ReadFileMemory(argv[1],&lFileSize,&FilePtr)==0)
    {
        printf("error reading %sn",argv[1]);
        return 1;
    }
    else printf("file %s read, %u bytesn",argv[1],lFileSize);
    if (argc>=3)
        BlockSizeCompress=atol(argv[2]);
    if (argc>=4)
        BlockSizeUncompress=atol(argv[3]);
    if (argc>=5)
        cprLevel=(int)atol(argv[4]);
    lBufferSizeCpr = lFileSize + (lFileSize/0x10) + 0x200;
    lBufferSizeUncpr = lBufferSizeCpr;
    CprPtr=(unsigned char*)malloc(lBufferSizeCpr + BlockSizeCompress);
    BeginCountPerfCounter(&li_qp,TRUE);
    dwGetTick=GetTickCount();
    BeginCountRdtsc(&li_rdtsc);
    {
        z_stream zcpr;
        int ret=Z_OK;
        long lOrigToDo = lFileSize;
        long lOrigDone = 0;
        int step=0;
        memset(&zcpr,0,sizeof(z_stream));
        deflateInit(&zcpr,cprLevel);
        zcpr.next_in = FilePtr;
        zcpr.next_out = CprPtr;
        do
        {
            long all_read_before = zcpr.total_in;
            zcpr.avail_in = min(lOrigToDo,BlockSizeCompress);
            zcpr.avail_out = BlockSizeCompress;
            ret=deflate(&zcpr,(zcpr.avail_in==lOrigToDo) ? Z_FINISH : Z_SYNC_FLUSH);
            lOrigDone += (zcpr.total_in-all_read_before);
            lOrigToDo -= (zcpr.total_in-all_read_before);
            step++;
        } while (ret==Z_OK);
        lSizeCpr=zcpr.total_out;
        deflateEnd(&zcpr);
        dwGetTick=GetTickCount()-dwGetTick;
        dwMsecQP=GetMsecSincePerfCounter(li_qp,TRUE);
        dwResRdtsc=GetResRdtsc(li_rdtsc,TRUE);
        printf("total compress size = %u, in %u stepn",lSizeCpr,step);
        printf("time = %u msec = %f secn",dwGetTick,dwGetTick/(double)1000.);
        printf("defcpr time QP = %u msec = %f secn",dwMsecQP,dwMsecQP/(double)1000.);
        printf("defcpr result rdtsc = %I64xnn",dwResRdtsc.QuadPart);
    }
    CprPtr=(unsigned char*)realloc(CprPtr,lSizeCpr);
    UncprPtr=(unsigned char*)malloc(lBufferSizeUncpr + BlockSizeUncompress);
    BeginCountPerfCounter(&li_qp,TRUE);
    dwGetTick=GetTickCount();
    BeginCountRdtsc(&li_rdtsc);
    {
        z_stream zcpr;
        int ret=Z_OK;
        long lOrigToDo = lSizeCpr;
        long lOrigDone = 0;
        int step=0;
        memset(&zcpr,0,sizeof(z_stream));
        inflateInit(&zcpr);
        zcpr.next_in = CprPtr;
        zcpr.next_out = UncprPtr;
        do
        {
            long all_read_before = zcpr.total_in;
            zcpr.avail_in = min(lOrigToDo,BlockSizeUncompress);
            zcpr.avail_out = BlockSizeUncompress;
            ret=inflate(&zcpr,Z_SYNC_FLUSH);
            lOrigDone += (zcpr.total_in-all_read_before);
            lOrigToDo -= (zcpr.total_in-all_read_before);
            step++;
        } while (ret==Z_OK);
        lSizeUncpr=zcpr.total_out;
        inflateEnd(&zcpr);
        dwGetTick=GetTickCount()-dwGetTick;
        dwMsecQP=GetMsecSincePerfCounter(li_qp,TRUE);
        dwResRdtsc=GetResRdtsc(li_rdtsc,TRUE);
        printf("total uncompress size = %u, in %u stepn",lSizeUncpr,step);
        printf("time = %u msec = %f secn",dwGetTick,dwGetTick/(double)1000.);
        printf("uncpr  time QP = %u msec = %f secn",dwMsecQP,dwMsecQP/(double)1000.);
        printf("uncpr  result rdtsc = %I64xnn",dwResRdtsc.QuadPart);
    }
    if (lSizeUncpr==lFileSize)
    {
        if (memcmp(FilePtr,UncprPtr,lFileSize)==0)
            printf("compare okn");
    }
    return 0;
}

						