#include <keraforge.h>


#define _KF_STATEFILE "data/state.bin"

int kf_state_save(struct kf_state *state)
{
	if (!kf_writebin(_KF_STATEFILE, (u8 *)state, sizeof(*state)))
	{
		KF_THROW("failed to write to %s", _KF_STATEFILE);
		return 0; /* unreachable */
	}

	return 1;
}

int kf_state_load(struct kf_state **pstate)
{
	char *infile = _KF_STATEFILE;
	kf_logdbg("loading state: %s", infile);

	int res = 0;

	if (!kf_exists(infile))
	{
		kf_logdbg("creating state...");
		struct kf_state s = {0};
		kf_state_save(&s);
		res = 1;
	}

	size_t len = 0;
	*pstate = (struct kf_state *)kf_readbin(infile, &len);
	kf_logdbg("loaded state (%p): len=%lu (res=%d)", *pstate, len, res);

	if (!*pstate)
	{
		KF_THROW("failed to load state");
		return -1; /* unreachable */
	}

	return res;
}