int MemoryStream::Read(void* dest, unsigned int length)
{
if (length + Pos > size) {
return GEM_ERROR;
}
ieByte* p = ( ieByte* ) ptr + Pos;
memcpy( dest, p, length );
if (Encrypted) {
ReadDecrypted( dest, length );
}
Pos += length;
return GEM_OK;
}
int MemoryStream::Read(void* dest, unsigned int length)
{
//we don't allow partial reads anyway, so it isn't a problem that
//i don't adjust length here (partial reads are evil)
if (Pos+length>size ) {
return GEM_ERROR;
}
memcpy(dest, data + Pos + (Encrypted ? 2 : 0), length);
if (Encrypted) {
ReadDecrypted( dest, length );
}
Pos += length;
return length;
}
int CachedFileStream::Read(void* dest, unsigned int length)
{
//we don't allow partial reads anyway, so it isn't a problem that
//i don't adjust length here (partial reads are evil)
if (Pos+length>size ) {
return GEM_ERROR;
}
unsigned int c = (unsigned int) _fread( dest, 1, length, str );
if (c != length) {
return GEM_ERROR;
}
if (Encrypted) {
ReadDecrypted( dest, c );
}
Pos += c;
return c;
}
int SlicedStream::Read(void* dest, unsigned int length)
{
//we don't allow partial reads anyway, so it isn't a problem that
//i don't adjust length here (partial reads are evil)
if (Pos+length>size ) {
return GEM_ERROR;
}
//str->Seek(startpos + Pos + (Encrypted ? 2 : 0), GEM_STREAM_START);
unsigned int c = (unsigned int) str->Read(dest, length);
if (c != length) {
return GEM_ERROR;
}
if (Encrypted) {
ReadDecrypted( dest, c );
}
Pos += c;
return c;
}
int FileStream::Read(void* dest, unsigned int length)
{
if (!opened) {
return GEM_ERROR;
}
//we don't allow partial reads anyway, so it isn't a problem that
//i don't adjust length here (partial reads are evil)
if (Pos+length>size ) {
return GEM_ERROR;
}
size_t c = str->Read(dest, length);
if (c != length) {
return GEM_ERROR;
}
if (Encrypted) {
ReadDecrypted( dest, c );
}
Pos += c;
return c;
}
