/* MemChunk::MemChunk
* MemChunk class constructor taking initial data
*******************************************************************/
MemChunk::MemChunk(const uint8_t* data, uint32_t size)
{
// Init variables
this->cur_ptr = 0;
this->data = NULL;
this->size = size;
// Load given data
importMem(data, size);
}
/* ArchiveEntry::importMemChunk
* Imports data from a MemChunk object into the entry, resizing it
* and clearing any currently existing data.
* Returns false if the MemChunk has no data, or true otherwise.
*******************************************************************/
bool ArchiveEntry::importMemChunk(MemChunk& mc)
{
// Check that the given MemChunk has data
if (mc.hasData())
{
// Copy the data from the MemChunk into the entry
return importMem(mc.getData(), mc.getSize());
}
else
return false;
}
/* ArchiveEntry::importEntry
* Imports data from another entry into this entry, resizing it
* and clearing any currently existing data.
* Returns false if the entry is null, true otherwise
*******************************************************************/
bool ArchiveEntry::importEntry(ArchiveEntry* entry)
{
// Check if locked
if (locked)
{
Global::error = "Entry is locked";
return false;
}
// Check parameters
if (!entry)
return false;
// Copy entry data
importMem(entry->getData(), entry->getSize());
return true;
}
/* ArchiveEntry::importFile
* Loads a portion of a file into the entry, overwriting any existing
* data currently in the entry. A size of 0 means load from the
* offset to the end of the file.
* Returns false if the file does not exist or the given offset/size
* are out of bounds, otherwise returns true.
*******************************************************************/
bool ArchiveEntry::importFile(string filename, uint32_t offset, uint32_t size)
{
// Check if locked
if (locked)
{
Global::error = "Entry is locked";
return false;
}
// Open the file
wxFile file(filename);
// Check that it opened ok
if (!file.IsOpened())
{
Global::error = "Unable to open file for reading";
return false;
}
// Get the size to read, if zero
if (size == 0)
size = file.Length() - offset;
// Check offset/size bounds
if (offset + size > file.Length())
return false;
// Create temporary buffer and load file contents
uint8_t* temp_buf = new uint8_t[size];
file.Seek(offset, wxFromStart);
file.Read(temp_buf, size);
// Import data into entry
importMem(temp_buf, size);
// Delete temp buffer
delete[] temp_buf;
return true;
}
