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#include "flexbuf.h"
#include <string.h>
FlexBuf::FlexBuf()
{
lpBuf = new char[1024];
nLastChar = 0;
nFirstChar = 0;
nSize = 1024;
nFill = 0;
clearData();
}
FlexBuf::~FlexBuf()
{
delete[] lpBuf;
}
bool FlexBuf::appendData( const char *lpData, int nDSize )
{
int nStrLen;
if( nDSize < 0 )
{
nStrLen = strlen( lpData );
}
else
{
nStrLen = nDSize;
}
if( nLastChar + nStrLen + 1 > nSize )
{
if( nFill + nStrLen + 1 < nSize )
{
memcpy( lpBuf, lpBuf+nFirstChar, nFill );
nLastChar -= nFirstChar;
nFirstChar = 0;
}
else
{
nSize += nStrLen+1;
char *lpNewBuf = new char[nSize];
memcpy( lpNewBuf, lpBuf+nFirstChar, nFill );
delete[] lpBuf;
lpBuf = lpNewBuf;
nLastChar -= nFirstChar;
nFirstChar = 0;
}
}
memcpy( &lpBuf[nLastChar], lpData, nStrLen );
nLastChar += nStrLen;
nFill += nStrLen;
lpBuf[nLastChar] = '\0';
return true;
}
bool FlexBuf::appendData( const char lData )
{
if( nLastChar + 2 > nSize )
{
if( nFill+2 < nSize )
{
memcpy( lpBuf, lpBuf+nFirstChar, nFill );
nLastChar -= nFirstChar;
nFirstChar = 0;
}
else
{
nSize += 1024;
char *lpNewBuf = new char[nSize];
memcpy( lpNewBuf, lpBuf+nFirstChar, nFill );
delete[] lpBuf;
lpBuf = lpNewBuf;
nLastChar -= nFirstChar;
nFirstChar = 0;
}
}
lpBuf[nLastChar] = lData;
nLastChar++;
nFill++;
lpBuf[nLastChar] = '\0';
return true;
}
bool FlexBuf::appendData( const short lData )
{
return appendData( (const char *)&lData, sizeof(short) );
}
bool FlexBuf::appendData( const int lData )
{
return appendData( (const char *)&lData, sizeof(int) );
}
bool FlexBuf::appendData( const long lData )
{
return appendData( (const char *)&lData, sizeof(long) );
}
bool FlexBuf::appendData( const float lData )
{
return appendData( (const char *)&lData, sizeof(float) );
}
bool FlexBuf::appendData( const double lData )
{
return appendData( (const char *)&lData, sizeof(double) );
}
bool FlexBuf::appendData( const unsigned char lData )
{
return appendData( (const char)lData );
}
bool FlexBuf::appendData( const unsigned short lData )
{
return appendData( (const char *)&lData, sizeof(short) );
}
bool FlexBuf::appendData( const unsigned long lData )
{
return appendData( (const char *)&lData, sizeof(long) );
}
bool FlexBuf::appendData( const unsigned int lData )
{
return appendData( (const char *)&lData, sizeof(int) );
}
bool FlexBuf::clearData()
{
nFirstChar = nLastChar = nFill = 0;
lpBuf[nLastChar] = '\0';
return true;
}
const char *FlexBuf::getData()
{
return (lpBuf+nFirstChar);
}
int FlexBuf::getLength()
{
return nFill;
}
int FlexBuf::getCapacity()
{
return nSize;
}
bool FlexBuf::usedData( int nAmount )
{
// Remove from the end if negative
if( nAmount < 0 )
{
if( nFill+nAmount < 0 )
{
nFill = nFirstChar = nLastChar = 0;
return true;
}
nLastChar += nAmount;
nFill += nAmount;
return true;
}
if( nAmount > nFill )
{
nAmount = nSize;
// return false;
}
//nLastChar -= nAmount;
nFirstChar += nAmount;
nFill -= nAmount;
if( nFill == 0 )
{
nFirstChar = nLastChar = 0;
}
//if( nLastChar > 0 )
//{
//memmove( lpBuf, &lpBuf[nAmount], nLastChar );
//}
return true;
}
int FlexBuf::findChar( char cTarget )
{
for( int j = nFirstChar; j < nLastChar; j++ )
{
if( lpBuf[j] == cTarget )
{
return j;
}
}
return -1;
}
void FlexBuf::ensureCapacity( int nAmount )
{
if( nLastChar + nAmount + 1 > nSize )
{
if( nFill + nAmount + 1 < nSize )
{
memcpy( lpBuf, lpBuf+nFirstChar, nFill );
nLastChar -= nFirstChar;
nFirstChar = 0;
}
else
{
nSize += nAmount+1;
char *lpNewBuf = new char[nSize];
memcpy( lpNewBuf, lpBuf+nFirstChar, nFill );
delete[] lpBuf;
lpBuf = lpNewBuf;
nLastChar -= nFirstChar;
nFirstChar = 0;
}
}
}
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