/// Allocate specified number of components if necessary
size_t CGPUProgramParams::allocOffset(const std::string &name, uint size, uint count, TType type)
{
nlassert(count > 0); // this code will not properly handle 0
nlassert(size > 0); // this code will not properly handle 0
nlassert(!name.empty()); // sanity check
uint nbComponents = size * count;
size_t offset = getOffset(name);
if (offset != s_End)
{
if (getCountByOffset(offset) >= nbComponents)
{
m_Meta[offset].Type = type;
m_Meta[offset].Size = size;
m_Meta[offset].Count = count;
return offset;
}
if (getCountByOffset(offset) < nbComponents)
{
freeOffset(offset);
}
}
// Allocate space
offset = allocOffset(size, count, type);
// Fill
m_Meta[offset].Name = name;
// Store offset in map
m_MapName[name] = offset;
return offset;
}
void CGPUProgramParams::map(uint index, const std::string &name)
{
size_t offsetIndex = getOffset(index);
size_t offsetName = getOffset(name);
if (offsetName != getEnd())
{
// Remove possible duplicate
if (offsetIndex != getEnd())
{
freeOffset(offsetIndex);
}
// Set index
m_Meta[offsetName].Index = index;
// Map index to name
if (index >= m_Map.size())
m_Map.resize(index + 1, s_End);
m_Map[index] = offsetName;
}
else if (offsetIndex != getEnd())
{
// Set name
m_Meta[offsetIndex].Name = name;
// Map name to index
m_MapName[name] = offsetIndex;
}
}
void CGPUProgramParams::unset(const std::string &name)
{
size_t offset = getOffset(name);
if (offset != getEnd())
{
freeOffset(offset);
}
}
void CGPUProgramParams::unset(uint index)
{
size_t offset = getOffset(index);
if (offset != getEnd())
{
freeOffset(offset);
}
}
//add a record, if success return 1, else 0
bool Page::addRecord(char* rec){
if ( canAddRecord(rec) ){
int temp = getSlotNumber();
int free_off = freeOffset();
int rec_length = strlen( rec );
//copy the record into the page and update related data
memcpy( content + free_off, rec, sizeof( char ) * rec_length );
setRecordLength( temp, rec_length );
setRecordOffset( temp, free_off );
//update the free offset and number of the slot in the page
setFreeOffset( free_off + rec_length );
slotNumberAdd();
return 1;
}
else return 0;
}
/// Allocate specified number of components if necessary
size_t CGPUProgramParams::allocOffset(uint index, uint size, uint count, TType type)
{
nlassert(count > 0); // this code will not properly handle 0
nlassert(size > 0); // this code will not properly handle 0
nlassert(index < 0xFFFF); // sanity check
uint nbComponents = size * count;
size_t offset = getOffset(index);
if (offset != s_End)
{
if (getCountByOffset(offset) >= nbComponents)
{
m_Meta[offset].Type = type;
m_Meta[offset].Size = size;
m_Meta[offset].Count = count;
return offset;
}
if (getCountByOffset(offset) < nbComponents)
{
freeOffset(offset);
}
}
// Allocate space
offset = allocOffset(size, count, type);
// Fill
m_Meta[offset].Index = index;
// Store offset in map
if (index >= m_Map.size())
m_Map.resize(index + 1, s_End);
m_Map[index] = offset;
return offset;
}
//if can add record return 1,else 0
bool Page::canAddRecord( char *rec ){
if ( freeOffset() + strlen(rec) + 8 + 8 * getSlotNumber() + 8 < CAPACITY ) return 1;
else return 0;
}