Modify（包含部分测试代码） 1.添加注释 2.ins按钮功能

zxd

2023-09-14 d34256830982fb9ea822c1e9b874c3b7fa0a614d

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#include "stdafx.h" 
#include "MyCircularBuf.h" 
//CMyCircularBuf 
CMyCircularBuf::CMyCircularBuf() 
{ 
    pBuffer=NULL; 
    nDataSize=0; 
    bIsEmpty=true; 
    bIsFull=false; 
} 
CMyCircularBuf::CMyCircularBuf(int nCapicity) 
{ 
    Alloc(nCapicity); 
} 
CMyCircularBuf::~CMyCircularBuf() 
{ 
    if (pBuffer!=NULL) {delete [] pBuffer;pBuffer=NULL;}     
} 
int CMyCircularBuf::Alloc(int nCapicity) 
{ 
    if (pBuffer!=NULL) {delete [] pBuffer;pBuffer=NULL;} 
    pBuffer=new char[nCapicity];  
    nmCapacity=nCapicity; 
    nDataSize=0; 
    ReadP=0;WriteP=0; 
    bIsEmpty=true; 
    bIsFull=false; 
    return nCapicity; 
} 
int CMyCircularBuf::GetCapicity() 
{ 
    return nmCapacity; 
} 
int CMyCircularBuf::GetNextWriteP(int nOffset) 
{ 
    int nextip=WriteP+nOffset; 
    if (nextip>=nmCapacity) {nextip-=nmCapacity;} 
    return nextip; 
} 
int CMyCircularBuf::GetNextReadP(int nOffset) 
{ 
    int nextop=ReadP+nOffset; 
    if (nextop>=nmCapacity) {nextop-=nmCapacity;} 
    return nextop; 
} 
int CMyCircularBuf::GetTailRoomSize() 
{ 
    int nTailLeftSize; 
    if (bIsFull) {nTailLeftSize=0; return nTailLeftSize;} 
    if (WriteP<ReadP) {nTailLeftSize=ReadP-WriteP;} 
    else {nTailLeftSize=nmCapacity-WriteP;} 
    return nTailLeftSize; 
} 
int CMyCircularBuf::GetTailDataSize() 
{ 
    int nTailLeftDataSize; 
    if (bIsEmpty) return 0; 
    if (WriteP>ReadP) nTailLeftDataSize=WriteP-ReadP; 
    else {nTailLeftDataSize=nmCapacity-ReadP;} 
    return nTailLeftDataSize; 
} 
int CMyCircularBuf::GetLeftRoomSize() 
{ 
    int nLeftSize=nmCapacity-nDataSize; 
    return nLeftSize; 
} 
int CMyCircularBuf::GetDataSize() 
{ 
    return nDataSize; 
} 
char * CMyCircularBuf::GetWriteBuffer(int * LeftRoomSize) 
{ 
    int nTailLeftRoomSize=GetTailRoomSize(); 
    *LeftRoomSize=nTailLeftRoomSize; 
    return pBuffer+WriteP; 
} 
int CMyCircularBuf::ReleaseWriteBuffer(int AddSize) 
{ 
    WriteP=GetNextWriteP(AddSize); 
    nDataSize+=AddSize; 
    bIsEmpty=false; 
    if (nDataSize>=nmCapacity) bIsFull=true; 
 
    return AddSize; 
} 
char * CMyCircularBuf::GetReadBuffer(int * DataSize) 
{ 
    int nTailLeftDataSize=GetTailDataSize(); 
    *DataSize=nTailLeftDataSize; 
    return pBuffer+ReadP; 
} 
int CMyCircularBuf::ReleaseReadBuffer(int DelSize) 
{ 
    DelData(DelSize); 
    return DelSize; 
} 
 
int CMyCircularBuf::PushIn(void * pData,int Size) 
{ 
    if (GetLeftRoomSize()<Size) {return -1;} 
    int nTailLeftSize=GetTailRoomSize(); 
    if (nTailLeftSize>=Size) 
    { 
        memcpy_s(pBuffer+WriteP,nTailLeftSize,pData,Size); 
        WriteP=GetNextWriteP(Size); 
    }else 
    { 
        memcpy_s(pBuffer+WriteP,nTailLeftSize,pData,nTailLeftSize); 
        memcpy_s(pBuffer,Size-nTailLeftSize,(char *)pData+nTailLeftSize,Size-nTailLeftSize); 
        WriteP=GetNextWriteP(Size); 
    } 
    bIsEmpty=false; 
    nDataSize+=Size; 
    if (nDataSize==nmCapacity) {bIsFull=true;} 
    return Size; 
} 
int CMyCircularBuf::CopyData(void * pData,int Size) 
{ 
    if (GetDataSize()<Size) {return -1;} 
    int nTailLeftSize=GetTailDataSize(); //»·Ðλº³åβ²¿Ê£ÓàÊý¾ÝÁ¿ 
    if (nTailLeftSize<Size)    ////Ê£Óà¿Õ¼äС£¬½«Êý¾ÝתÒƵ½Ò»Æð 
    { 
        memcpy_s(pData,Size,pBuffer+ReadP,nTailLeftSize); 
        memcpy_s((char *)pData+nTailLeftSize,Size-nTailLeftSize,pBuffer,Size-nTailLeftSize); 
    }else 
    { 
        memcpy_s(pData,Size,pBuffer+ReadP,Size); 
    } 
    return Size; 
} 
int CMyCircularBuf::DelData(int Size) 
{ 
    if (GetDataSize()<Size) {return -1;} 
    bIsFull=false; 
    ReadP=GetNextReadP(Size); 
    nDataSize-=Size; 
    if (nDataSize==0) {bIsEmpty=true;} 
    return Size; 
} 
 
int CMyCircularBuf::PopOut(void * pData,int Size) 
{ 
    CopyData(pData,Size); 
    DelData(Size); 
    return Size; 
}