wxInputStream& wxBufferedInputStream::Read(void *buf, size_t size)
{
// reset the error flag
Reset();
// first read from the already cached data
m_lastcount = GetWBack(buf, size);
// do we have to read anything more?
if ( m_lastcount < size )
{
size -= m_lastcount;
buf = (char *)buf + m_lastcount;
// the call to wxStreamBuffer::Read() below will reset our m_lastcount,
// so save it
size_t countOld = m_lastcount;
m_i_streambuf->Read(buf, size);
m_lastcount += countOld;
}
return *this;
}
wxInputStream& wxBufferedInputStream::Read(void *buf, size_t size)
{
// reset the error flag
Reset();
// first read from the already cached data
m_lastcount = GetWBack(buf, size);
// do we have to read anything more?
if ( m_lastcount < size )
{
size -= m_lastcount;
buf = (char *)buf + m_lastcount;
// the call to wxStreamBuffer::Read() below may reset our m_lastcount
// (but it also may not do it if the buffer is associated to another
// existing stream and wasn't created by us), so save it
size_t countOld = m_lastcount;
// the new count of the bytes read is the count of bytes read this time
m_lastcount = m_i_streambuf->Read(buf, size);
// plus those we had read before
m_lastcount += countOld;
}
return *this;
}
wxInputStream& wxInputStream::Read(void *buf, size_t size)
{
char *p = (char *)buf;
m_lastcount = 0;
size_t read = GetWBack(buf, size);
for ( ;; )
{
size -= read;
m_lastcount += read;
p += read;
if ( !size )
{
// we read the requested amount of data
break;
}
if ( p != buf && !CanRead() )
{
// we have already read something and we would block in OnSysRead()
// now: don't do it but return immediately
break;
}
read = OnSysRead(p, size);
if ( !read )
{
// no more data available
break;
}
}
return *this;
}
I_IStream& Binary_Stream::get(
void* inBuffer,
vuint32 inHowMuch )
{
char *p = (char *)inBuffer;
mLastCount = 0;
vuint32 read = GetWBack(inBuffer, inHowMuch);
for( ;; )
{
/* if( (vint32)inHowMuch - (vint32)read < 0l )
{
int i = 1;
i;
}*/
inHowMuch -= read;
mLastCount += read;
p += read;
if ( !inHowMuch )
{
// we read the requested amount of data
break;
}
if ( p != inBuffer && !CanRead() )
{
// we have already read something and we would block in DoGet()
// now: don't do it but return immediately
break;
}
read = DoGet(p, inHowMuch);
if ( !read )
{
// no more data available
break;
}
}
return * (I_IStream*) this;
}