mie/mie/trait/trait-table.c

#include <mie/trait/trait-table.h>
#include <mie/trait/trait.h>

#define UNIQUE_TRAIT_NS_ID                                                     \
	MIE_ID(0xd6, 0xb6, 0x72, 0xae, 0xef, 0x65, 0x40, 0x24, 0xaa, 0x6d,     \
	       0xef, 0xfc, 0x37, 0xda, 0x5c, 0x88)

#define GENERIC_TRAIT_NS_ID                                                    \
	MIE_ID(0x1a, 0x60, 0xbe, 0x20, 0xa6, 0xa0, 0x43, 0x3a, 0xb1, 0x2c,     \
	       0x33, 0x9a, 0xac, 0x52, 0xa0, 0xca)

struct unique_trait {
	mie_id u_id;
	const struct mie_trait *u_trait;
};

struct generic_trait {
	/* generic trait ID. */
	mie_id g_id;
	/* list of struct unique_trait */
	b_queue g_traits;
};

static struct unique_trait *unique_trait_create(const struct mie_trait *trait)
{
	struct unique_trait *out = malloc(sizeof *out);
	if (!out) {
		return NULL;
	}

	memset(out, 0x0, sizeof *out);
	out->u_id = trait->tr_id;
	out->u_trait = trait;

	return out;
}

static void unique_trait_destroy(struct unique_trait *trait)
{
	free(trait);
}

static struct generic_trait *generic_trait_create(const struct mie_trait *trait)
{
	struct generic_trait *out = malloc(sizeof *out);
	if (!out) {
		return NULL;
	}

	memset(out, 0x0, sizeof *out);
	out->g_id = trait->tr_def->tr_id;

	struct unique_trait *entry = unique_trait_create(trait);
	if (!entry) {
		free(out);
		return NULL;
	}

	b_queue_push_back(&out->g_traits, &entry->u_id.e_entry);

	return out;
}

static void generic_trait_destroy(struct generic_trait *trait)
{
	b_queue_entry *cur = b_queue_first(&trait->g_traits);
	while (cur) {
		b_queue_entry *next = b_queue_next(cur);
		b_queue_delete(&trait->g_traits, cur);
		struct unique_trait *u
			= b_unbox(struct unique_trait, cur, u_id.e_entry);
		unique_trait_destroy(u);
		cur = next;
	}

	free(trait);
}

void mie_trait_table_init(struct mie_trait_table *out)
{
	memset(out, 0x0, sizeof *out);

	mie_id unique_ns = UNIQUE_TRAIT_NS_ID;
	mie_id_map_init(&out->tr_unique, &unique_ns);

	mie_id generic_ns = GENERIC_TRAIT_NS_ID;
	mie_id_map_init(&out->tr_generic, &generic_ns);
}

void mie_trait_table_cleanup(struct mie_trait_table *table)
{
	/* TODO */
}

const struct mie_trait *mie_trait_table_get_unique(
	const struct mie_trait_table *table, const char *dialect_name,
	const char *trait_name)
{
	mie_id id;
	struct mie_id_builder id_ctx;
	mie_id_builder_begin(&id_ctx, mie_id_map_get_ns(&table->tr_unique));
	mie_id_builder_add_cstr(&id_ctx, dialect_name);
	mie_id_builder_add_char(&id_ctx, '.');
	mie_id_builder_add_cstr(&id_ctx, trait_name);
	mie_id_builder_end(&id_ctx, &id);

	const mie_id *result = mie_id_map_get(&table->tr_unique, &id);
	const struct unique_trait *entry
		= b_unbox(struct unique_trait, entry, u_id);
	return entry ? entry->u_trait : NULL;
}

static enum mie_status put_unique_trait(
	struct mie_trait_table *table, const struct mie_trait *trait)
{
	return MIE_SUCCESS;
}

static enum mie_status put_generic_trait(
	struct mie_trait_table *table, const struct mie_trait *trait)
{
	return MIE_SUCCESS;
}

enum mie_status mie_trait_table_put(
	struct mie_trait_table *table, const struct mie_trait *trait)
{
	if (trait->tr_def->tr_flags & MIE_TRAIT_F_PARAMETISED) {
		return put_generic_trait(table, trait);
	}

	return put_unique_trait(table, trait);
}

enum mie_status mie_trait_table_get_generic(
	const struct mie_trait_table *table, const char *dialect_name,
	const char *trait_name, struct mie_trait_table_iterator *it)
{
	mie_id id;
	struct mie_id_builder id_ctx;
	mie_id_builder_begin(&id_ctx, mie_id_map_get_ns(&table->tr_unique));
	mie_id_builder_add_cstr(&id_ctx, dialect_name);
	mie_id_builder_add_char(&id_ctx, '.');
	mie_id_builder_add_cstr(&id_ctx, trait_name);
	mie_id_builder_end(&id_ctx, &id);

	const mie_id *result = mie_id_map_get(&table->tr_unique, &id);
	const struct generic_trait *entry
		= b_unbox(struct generic_trait, entry, g_id);

	if (!entry || b_queue_empty(&entry->g_traits)) {
		return MIE_ERR_NO_ENTRY;
	}

	memset(it, 0x0, sizeof *it);

	it->_e = b_queue_first(&entry->g_traits);
	struct unique_trait *trait
		= b_unbox(struct unique_trait, it->_e, u_id.e_entry);

	it->it_trait = trait->u_trait;

	return MIE_SUCCESS;
}

enum mie_status mie_trait_table_iterator_move_next(
	struct mie_trait_table_iterator *it)
{
	if (!it->_e) {
		return MIE_ERR_NO_ENTRY;
	}

	it->_e = b_queue_next(it->_e);
	if (!it->_e) {
		return MIE_ERR_NO_ENTRY;
	}

	struct unique_trait *trait
		= b_unbox(struct unique_trait, it->_e, u_id.e_entry);

	it->it_trait = trait->u_trait;
	return MIE_SUCCESS;
}