3d2ab595
 Hu Chunming
支持gb28181
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/*******************************************************}
{ }
{ File: buffer.h }
{ Created by Tsviatko Jongov }
{ http://tsviatko.jongov.com }
{ Date : 25.01.2007 }
{ }
{ CBuffer class. }
{ }
{*******************************************************/
#pragma once
#include <string.h>
#include <malloc.h>
typedef int BOOL;
class CBuffer
{
private:
char * fBuf = NULL; // buffer for bytes
int fSize; // size of buffer
int fLast; // points after Last valid byte
public:
CBuffer(int Size)
{
fLast = 0;
fSize = 0;
fFirst = 0;
if (Size > 0)
{
fBuf = (char *)malloc(Size);
fSize = Size;
}
}
~CBuffer()
{
if (fBuf != NULL)
{
free(fBuf);
fBuf = NULL;
}
}
void add(char * Data, int Size)
{
if (fLast + Size > fSize)
{
char * tmp = (char *)malloc(fSize + Size);
memcpy(tmp, fBuf, fLast);
fSize += Size;
free(fBuf);
fBuf = tmp;
}
memcpy(fBuf + fLast, Data, Size);
fLast += Size;
}
void compact()
{
if (fFirst > 0)
{
int aLen = fLast - fFirst;
memmove(fBuf, fBuf + fFirst, aLen);
fFirst = 0;
fLast = aLen;
}
}
void reset()
{
fFirst = 0;
fLast = 0;
}
int len()
{
return (fLast - fFirst);
}
void * head()
{
return fBuf + fFirst;
}
int fFirst;
};
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