int FileAccessBuffered::get_buffer(uint8_t *p_dest,int p_elements) const {
ERR_FAIL_COND_V(!file.open, -1);
if (p_elements > cache_size) {
int total_read = 0;
if (!(cache.offset == -1 || file.offset < cache.offset || file.offset >= cache.offset + cache.buffer.size())) {
int size = (cache.buffer.size() - (file.offset - cache.offset));
size = size - (size % 4);
//DVector<uint8_t>::Read read = cache.buffer.read();
//memcpy(p_dest, read.ptr() + (file.offset - cache.offset), size);
memcpy(p_dest, cache.buffer.ptr() + (file.offset - cache.offset), size);
p_dest += size;
p_elements -= size;
file.offset += size;
total_read += size;
};
int err = read_data_block(file.offset, p_elements, p_dest);
if (err >= 0) {
total_read += err;
file.offset += err;
};
return total_read;
};
int to_read = p_elements;
int total_read = 0;
while (to_read > 0) {
int left = cache_data_left();
if (left == 0) {
if (to_read > 0) {
file.offset += to_read;
};
return total_read;
};
if (left < 0) {
return left;
};
int r = MIN(left, to_read);
//DVector<uint8_t>::Read read = cache.buffer.read();
//memcpy(p_dest+total_read, &read.ptr()[file.offset - cache.offset], r);
memcpy(p_dest+total_read, cache.buffer.ptr() + (file.offset - cache.offset), r);
file.offset += r;
total_read += r;
to_read -= r;
};
return p_elements;
};
uint8_t FileAccessBuffered::get_8() const {
ERR_FAIL_COND_V(!file.open, 0);
uint8_t byte = 0;
if (cache_data_left() >= 1) {
byte = cache.buffer[file.offset - cache.offset];
};
++file.offset;
return byte;
};
