[babeltrace.git] / lib / values.c

/*
 * values.c: value objects
 *
 * Babeltrace Library
 *
 * Copyright (c) 2015 EfficiOS Inc. and Linux Foundation
 * Copyright (c) 2015 Philippe Proulx <pproulx@efficios.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <string.h>
#include <babeltrace/ref-internal.h>
#include <babeltrace/compiler.h>
#include <babeltrace/values.h>
#include <glib.h>

#define BT_VALUE_FROM_CONCRETE(_concrete) ((struct bt_value *) (_concrete))
#define BT_VALUE_TO_BOOL(_base) ((struct bt_value_bool *) (_base))
#define BT_VALUE_TO_INTEGER(_base) ((struct bt_value_integer *) (_base))
#define BT_VALUE_TO_FLOAT(_base) ((struct bt_value_float *) (_base))
#define BT_VALUE_TO_STRING(_base) ((struct bt_value_string *) (_base))
#define BT_VALUE_TO_ARRAY(_base) ((struct bt_value_array *) (_base))
#define BT_VALUE_TO_MAP(_base) ((struct bt_value_map *) (_base))

struct bt_value {
        enum bt_value_type type;
        struct bt_ref ref_count;
        bool is_frozen;
};

static
struct bt_value bt_value_null_instance = {
        .type = BT_VALUE_TYPE_NULL,
        .is_frozen = true,
};

struct bt_value *bt_value_null = &bt_value_null_instance;

struct bt_value_bool {
        struct bt_value base;
        bool value;
};

struct bt_value_integer {
        struct bt_value base;
        int64_t value;
};

struct bt_value_float {
        struct bt_value base;
        double value;
};

struct bt_value_string {
        struct bt_value base;
        GString *gstr;
};

struct bt_value_array {
        struct bt_value base;
        GPtrArray *garray;
};

struct bt_value_map {
        struct bt_value base;
        GHashTable *ght;
};

static
void bt_value_destroy(struct bt_ref *ref_count);

static
void bt_value_string_destroy(struct bt_value *object)
{
        g_string_free(BT_VALUE_TO_STRING(object)->gstr, TRUE);
}

static
void bt_value_array_destroy(struct bt_value *object)
{
        /*
         * Pointer array's registered value destructor will take care
         * of putting each contained object.
         */
        g_ptr_array_free(BT_VALUE_TO_ARRAY(object)->garray, TRUE);
}

static
void bt_value_map_destroy(struct bt_value *object)
{
        /*
         * Hash table's registered value destructor will take care of
         * putting each contained object. Keys are GQuarks and cannot
         * be destroyed anyway.
         */
        g_hash_table_destroy(BT_VALUE_TO_MAP(object)->ght);
}

static
void (* const destroy_funcs[])(struct bt_value *) = {
        [BT_VALUE_TYPE_NULL] =          NULL,
        [BT_VALUE_TYPE_BOOL] =          NULL,
        [BT_VALUE_TYPE_INTEGER] =       NULL,
        [BT_VALUE_TYPE_FLOAT] =         NULL,
        [BT_VALUE_TYPE_STRING] =        bt_value_string_destroy,
        [BT_VALUE_TYPE_ARRAY] =         bt_value_array_destroy,
        [BT_VALUE_TYPE_MAP] =           bt_value_map_destroy,
};

static
struct bt_value *bt_value_null_copy(const struct bt_value *null_obj)
{
        return bt_value_null;
}

static
struct bt_value *bt_value_bool_copy(const struct bt_value *bool_obj)
{
        return bt_value_bool_create_init(BT_VALUE_TO_BOOL(bool_obj)->value);
}

static
struct bt_value *bt_value_integer_copy(const struct bt_value *integer_obj)
{
        return bt_value_integer_create_init(
                BT_VALUE_TO_INTEGER(integer_obj)->value);
}

static
struct bt_value *bt_value_float_copy(const struct bt_value *float_obj)
{
        return bt_value_float_create_init(
                BT_VALUE_TO_FLOAT(float_obj)->value);
}

static
struct bt_value *bt_value_string_copy(const struct bt_value *string_obj)
{
        return bt_value_string_create_init(
                BT_VALUE_TO_STRING(string_obj)->gstr->str);
}

static
struct bt_value *bt_value_array_copy(const struct bt_value *array_obj)
{
        int i;
        int ret;
        struct bt_value *copy_obj;
        struct bt_value_array *typed_array_obj;

        typed_array_obj = BT_VALUE_TO_ARRAY(array_obj);
        copy_obj = bt_value_array_create();

        if (!copy_obj) {
                goto end;
        }

        for (i = 0; i < typed_array_obj->garray->len; ++i) {
                struct bt_value *element_obj_copy;
                struct bt_value *element_obj = bt_value_array_get(array_obj, i);

                if (!element_obj) {
                        BT_VALUE_PUT(copy_obj);
                        goto end;
                }

                element_obj_copy = bt_value_copy(element_obj);
                BT_VALUE_PUT(element_obj);

                if (!element_obj_copy) {
                        BT_VALUE_PUT(copy_obj);
                        goto end;
                }

                ret = bt_value_array_append(copy_obj, element_obj_copy);
                BT_VALUE_PUT(element_obj_copy);

                if (ret) {
                        BT_VALUE_PUT(copy_obj);
                        goto end;
                }
        }

end:
        return copy_obj;
}

static
struct bt_value *bt_value_map_copy(const struct bt_value *map_obj)
{
        int ret;
        GHashTableIter iter;
        gpointer key, element_obj;
        struct bt_value *copy_obj;
        struct bt_value *element_obj_copy;
        struct bt_value_map *typed_map_obj;

        typed_map_obj = BT_VALUE_TO_MAP(map_obj);
        copy_obj = bt_value_map_create();

        if (!copy_obj) {
                goto end;
        }

        g_hash_table_iter_init(&iter, typed_map_obj->ght);

        while (g_hash_table_iter_next(&iter, &key, &element_obj)) {
                const char *key_str = g_quark_to_string((unsigned long) key);

                element_obj_copy = bt_value_copy(element_obj);

                if (!element_obj_copy) {
                        BT_VALUE_PUT(copy_obj);
                        goto end;
                }

                ret = bt_value_map_insert(copy_obj, key_str, element_obj_copy);
                BT_VALUE_PUT(element_obj_copy);

                if (ret) {
                        BT_VALUE_PUT(copy_obj);
                        goto end;
                }
        }

end:
        return copy_obj;
}

static
struct bt_value *(* const copy_funcs[])(const struct bt_value *) = {
        [BT_VALUE_TYPE_NULL] =          bt_value_null_copy,
        [BT_VALUE_TYPE_BOOL] =          bt_value_bool_copy,
        [BT_VALUE_TYPE_INTEGER] =       bt_value_integer_copy,
        [BT_VALUE_TYPE_FLOAT] =         bt_value_float_copy,
        [BT_VALUE_TYPE_STRING] =        bt_value_string_copy,
        [BT_VALUE_TYPE_ARRAY] =         bt_value_array_copy,
        [BT_VALUE_TYPE_MAP] =           bt_value_map_copy,
};

static
bool bt_value_null_compare(const struct bt_value *object_a,
                const struct bt_value *object_b)
{
        /*
         * Always true since bt_value_compare() already checks if both
         * object_a and object_b have the same type, and in the case of
         * null value objects, they're always the same if it is so.
         */
        return true;
}

static
bool bt_value_bool_compare(const struct bt_value *object_a,
                const struct bt_value *object_b)
{
        return BT_VALUE_TO_BOOL(object_a)->value ==
                BT_VALUE_TO_BOOL(object_b)->value;
}

static
bool bt_value_integer_compare(const struct bt_value *object_a,
                const struct bt_value *object_b)
{
        return BT_VALUE_TO_INTEGER(object_a)->value ==
                BT_VALUE_TO_INTEGER(object_b)->value;
}

static
bool bt_value_float_compare(const struct bt_value *object_a,
                const struct bt_value *object_b)
{
        return BT_VALUE_TO_FLOAT(object_a)->value ==
                BT_VALUE_TO_FLOAT(object_b)->value;
}

static
bool bt_value_string_compare(const struct bt_value *object_a,
                const struct bt_value *object_b)
{
        return !strcmp(BT_VALUE_TO_STRING(object_a)->gstr->str,
                BT_VALUE_TO_STRING(object_b)->gstr->str);
}

static
bool bt_value_array_compare(const struct bt_value *object_a,
                const struct bt_value *object_b)
{
        int i;
        bool ret = true;
        const struct bt_value_array *array_obj_a =
                BT_VALUE_TO_ARRAY(object_a);

        if (bt_value_array_size(object_a) != bt_value_array_size(object_b)) {
                ret = false;
                goto end;
        }

        for (i = 0; i < array_obj_a->garray->len; ++i) {
                struct bt_value *element_obj_a;
                struct bt_value *element_obj_b;

                element_obj_a = bt_value_array_get(object_a, i);
                element_obj_b = bt_value_array_get(object_b, i);

                if (!bt_value_compare(element_obj_a, element_obj_b)) {
                        BT_VALUE_PUT(element_obj_a);
                        BT_VALUE_PUT(element_obj_b);
                        ret = false;
                        goto end;
                }

                BT_VALUE_PUT(element_obj_a);
                BT_VALUE_PUT(element_obj_b);
        }

end:
        return ret;
}

static
bool bt_value_map_compare(const struct bt_value *object_a,
                const struct bt_value *object_b)
{
        bool ret = true;
        GHashTableIter iter;
        gpointer key, element_obj_a;
        const struct bt_value_map *map_obj_a = BT_VALUE_TO_MAP(object_a);

        if (bt_value_map_size(object_a) != bt_value_map_size(object_b)) {
                ret = false;
                goto end;
        }

        g_hash_table_iter_init(&iter, map_obj_a->ght);

        while (g_hash_table_iter_next(&iter, &key, &element_obj_a)) {
                struct bt_value *element_obj_b;
                const char *key_str = g_quark_to_string((unsigned long) key);

                element_obj_b = bt_value_map_get(object_b, key_str);

                if (!bt_value_compare(element_obj_a, element_obj_b)) {
                        BT_VALUE_PUT(element_obj_b);
                        ret = false;
                        goto end;
                }

                BT_VALUE_PUT(element_obj_b);
        }

end:
        return ret;
}

static
bool (* const compare_funcs[])(const struct bt_value *,
                const struct bt_value *) = {
        [BT_VALUE_TYPE_NULL] =          bt_value_null_compare,
        [BT_VALUE_TYPE_BOOL] =          bt_value_bool_compare,
        [BT_VALUE_TYPE_INTEGER] =       bt_value_integer_compare,
        [BT_VALUE_TYPE_FLOAT] = bt_value_float_compare,
        [BT_VALUE_TYPE_STRING] =        bt_value_string_compare,
        [BT_VALUE_TYPE_ARRAY] = bt_value_array_compare,
        [BT_VALUE_TYPE_MAP] =           bt_value_map_compare,
};

void bt_value_null_freeze(struct bt_value *object)
{
}

void bt_value_generic_freeze(struct bt_value *object)
{
        object->is_frozen = true;
}

void bt_value_array_freeze(struct bt_value *object)
{
        int i;
        struct bt_value_array *typed_array_obj =
                BT_VALUE_TO_ARRAY(object);

        for (i = 0; i < typed_array_obj->garray->len; ++i) {
                struct bt_value *element_obj =
                        g_ptr_array_index(typed_array_obj->garray, i);

                bt_value_freeze(element_obj);
        }

        bt_value_generic_freeze(object);
}

void bt_value_map_freeze(struct bt_value *object)
{
        GHashTableIter iter;
        gpointer key, element_obj;
        const struct bt_value_map *map_obj = BT_VALUE_TO_MAP(object);

        g_hash_table_iter_init(&iter, map_obj->ght);

        while (g_hash_table_iter_next(&iter, &key, &element_obj)) {
                bt_value_freeze(element_obj);
        }

        bt_value_generic_freeze(object);
}

static
void (* const freeze_funcs[])(struct bt_value *) = {
        [BT_VALUE_TYPE_NULL] =          bt_value_null_freeze,
        [BT_VALUE_TYPE_BOOL] =          bt_value_generic_freeze,
        [BT_VALUE_TYPE_INTEGER] =       bt_value_generic_freeze,
        [BT_VALUE_TYPE_FLOAT] =         bt_value_generic_freeze,
        [BT_VALUE_TYPE_STRING] =        bt_value_generic_freeze,
        [BT_VALUE_TYPE_ARRAY] =         bt_value_array_freeze,
        [BT_VALUE_TYPE_MAP] =           bt_value_map_freeze,
};

static
void bt_value_destroy(struct bt_ref *ref_count)
{
        struct bt_value *object;

        object = container_of(ref_count, struct bt_value, ref_count);
        assert(object->type != BT_VALUE_TYPE_UNKNOWN);

        if (bt_value_is_null(object)) {
                return;
        }

        if (destroy_funcs[object->type]) {
                destroy_funcs[object->type](object);
        }

        g_free(object);
}

void bt_value_get(struct bt_value *object)
{
        if (object && !bt_value_is_null(object)) {
                bt_ref_get(&object->ref_count);
        }

        return;
}

void bt_value_put(struct bt_value *object)
{
        if (object && !bt_value_is_null(object)) {
                bt_ref_put(&object->ref_count);
        }
}

enum bt_value_status bt_value_freeze(struct bt_value *object)
{
        enum bt_value_status ret = BT_VALUE_STATUS_OK;

        if (!object) {
                ret = BT_VALUE_STATUS_INVAL;
                goto end;
        }

        freeze_funcs[object->type](object);

end:
        return ret;
}

bool bt_value_is_frozen(const struct bt_value *object)
{
        return object && object->is_frozen;
}

enum bt_value_type bt_value_get_type(const struct bt_value *object)
{
        if (!object) {
                return BT_VALUE_TYPE_UNKNOWN;
        }

        return object->type;
}

static
struct bt_value bt_value_create_base(enum bt_value_type type)
{
        struct bt_value base;

        base.type = type;
        base.is_frozen = false;
        bt_ref_init(&base.ref_count, bt_value_destroy);

        return base;
}

struct bt_value *bt_value_bool_create_init(bool val)
{
        struct bt_value_bool *bool_obj;

        bool_obj = g_new0(struct bt_value_bool, 1);

        if (!bool_obj) {
                goto end;
        }

        bool_obj->base = bt_value_create_base(BT_VALUE_TYPE_BOOL);
        bool_obj->value = val;

end:
        return BT_VALUE_FROM_CONCRETE(bool_obj);
}

struct bt_value *bt_value_bool_create(void)
{
        return bt_value_bool_create_init(false);
}

struct bt_value *bt_value_integer_create_init(int64_t val)
{
        struct bt_value_integer *integer_obj;

        integer_obj = g_new0(struct bt_value_integer, 1);

        if (!integer_obj) {
                goto end;
        }

        integer_obj->base = bt_value_create_base(BT_VALUE_TYPE_INTEGER);
        integer_obj->value = val;

end:
        return BT_VALUE_FROM_CONCRETE(integer_obj);
}

struct bt_value *bt_value_integer_create(void)
{
        return bt_value_integer_create_init(0);
}

struct bt_value *bt_value_float_create_init(double val)
{
        struct bt_value_float *float_obj;

        float_obj = g_new0(struct bt_value_float, 1);

        if (!float_obj) {
                goto end;
        }

        float_obj->base = bt_value_create_base(BT_VALUE_TYPE_FLOAT);
        float_obj->value = val;

end:
        return BT_VALUE_FROM_CONCRETE(float_obj);
}

struct bt_value *bt_value_float_create(void)
{
        return bt_value_float_create_init(0.);
}

struct bt_value *bt_value_string_create_init(const char *val)
{
        struct bt_value_string *string_obj = NULL;

        if (!val) {
                goto end;
        }

        string_obj = g_new0(struct bt_value_string, 1);

        if (!string_obj) {
                goto end;
        }

        string_obj->base = bt_value_create_base(BT_VALUE_TYPE_STRING);
        string_obj->gstr = g_string_new(val);

        if (!string_obj->gstr) {
                g_free(string_obj);
                string_obj = NULL;
                goto end;
        }

end:
        return BT_VALUE_FROM_CONCRETE(string_obj);
}

struct bt_value *bt_value_string_create(void)
{
        return bt_value_string_create_init("");
}

struct bt_value *bt_value_array_create(void)
{
        struct bt_value_array *array_obj;

        array_obj = g_new0(struct bt_value_array, 1);

        if (!array_obj) {
                goto end;
        }

        array_obj->base = bt_value_create_base(BT_VALUE_TYPE_ARRAY);
        array_obj->garray = g_ptr_array_new_full(0,
                (GDestroyNotify) bt_value_put);

        if (!array_obj->garray) {
                g_free(array_obj);
                array_obj = NULL;
                goto end;
        }

end:
        return BT_VALUE_FROM_CONCRETE(array_obj);
}

struct bt_value *bt_value_map_create(void)
{
        struct bt_value_map *map_obj;

        map_obj = g_new0(struct bt_value_map, 1);

        if (!map_obj) {
                goto end;
        }

        map_obj->base = bt_value_create_base(BT_VALUE_TYPE_MAP);
        map_obj->ght = g_hash_table_new_full(g_direct_hash, g_direct_equal,
                NULL, (GDestroyNotify) bt_value_put);

        if (!map_obj->ght) {
                g_free(map_obj);
                map_obj = NULL;
                goto end;
        }

end:
        return BT_VALUE_FROM_CONCRETE(map_obj);
}

enum bt_value_status bt_value_bool_get(const struct bt_value *bool_obj,
        bool *val)
{
        enum bt_value_status ret = BT_VALUE_STATUS_OK;
        struct bt_value_bool *typed_bool_obj = BT_VALUE_TO_BOOL(bool_obj);

        if (!bool_obj || !bt_value_is_bool(bool_obj) || !val) {
                ret = BT_VALUE_STATUS_INVAL;
                goto end;
        }

        *val = typed_bool_obj->value;

end:
        return ret;
}

enum bt_value_status bt_value_bool_set(struct bt_value *bool_obj, bool val)
{
        enum bt_value_status ret = BT_VALUE_STATUS_OK;
        struct bt_value_bool *typed_bool_obj = BT_VALUE_TO_BOOL(bool_obj);

        if (!bool_obj || !bt_value_is_bool(bool_obj)) {
                ret = BT_VALUE_STATUS_INVAL;
                goto end;
        }

        if (bool_obj->is_frozen) {
                ret = BT_VALUE_STATUS_FROZEN;
                goto end;
        }

        typed_bool_obj->value = val;

end:
        return ret;
}

enum bt_value_status bt_value_integer_get(const struct bt_value *integer_obj,
        int64_t *val)
{
        enum bt_value_status ret = BT_VALUE_STATUS_OK;
        struct bt_value_integer *typed_integer_obj =
                BT_VALUE_TO_INTEGER(integer_obj);

        if (!integer_obj || !bt_value_is_integer(integer_obj) || !val) {
                ret = BT_VALUE_STATUS_INVAL;
                goto end;
        }

        *val = typed_integer_obj->value;

end:
        return ret;
}

enum bt_value_status bt_value_integer_set(struct bt_value *integer_obj,
        int64_t val)
{
        enum bt_value_status ret = BT_VALUE_STATUS_OK;
        struct bt_value_integer *typed_integer_obj =
                BT_VALUE_TO_INTEGER(integer_obj);

        if (!integer_obj || !bt_value_is_integer(integer_obj)) {
                ret = BT_VALUE_STATUS_INVAL;
                goto end;
        }

        if (integer_obj->is_frozen) {
                ret = BT_VALUE_STATUS_FROZEN;
                goto end;
        }

        typed_integer_obj->value = val;

end:
        return ret;
}

enum bt_value_status bt_value_float_get(const struct bt_value *float_obj,
        double *val)
{
        enum bt_value_status ret = BT_VALUE_STATUS_OK;
        struct bt_value_float *typed_float_obj =
                BT_VALUE_TO_FLOAT(float_obj);

        if (!float_obj || !bt_value_is_float(float_obj) || !val) {
                ret = BT_VALUE_STATUS_INVAL;
                goto end;
        }

        *val = typed_float_obj->value;

end:
        return ret;
}

enum bt_value_status bt_value_float_set(struct bt_value *float_obj,
        double val)
{
        enum bt_value_status ret = BT_VALUE_STATUS_OK;
        struct bt_value_float *typed_float_obj =
                BT_VALUE_TO_FLOAT(float_obj);

        if (!float_obj || !bt_value_is_float(float_obj)) {
                ret = BT_VALUE_STATUS_INVAL;
                goto end;
        }

        if (float_obj->is_frozen) {
                ret = BT_VALUE_STATUS_FROZEN;
                goto end;
        }

        typed_float_obj->value = val;

end:
        return ret;
}

enum bt_value_status bt_value_string_get(const struct bt_value *string_obj,
        const char **val)
{
        enum bt_value_status ret = BT_VALUE_STATUS_OK;
        struct bt_value_string *typed_string_obj =
                BT_VALUE_TO_STRING(string_obj);

        if (!string_obj || !bt_value_is_string(string_obj) || !val) {
                ret = BT_VALUE_STATUS_INVAL;
                goto end;
        }

        *val = typed_string_obj->gstr->str;

end:
        return ret;
}

enum bt_value_status bt_value_string_set(struct bt_value *string_obj,
        const char *val)
{
        enum bt_value_status ret = BT_VALUE_STATUS_OK;
        struct bt_value_string *typed_string_obj =
                BT_VALUE_TO_STRING(string_obj);

        if (!string_obj || !bt_value_is_string(string_obj) || !val) {
                ret = BT_VALUE_STATUS_INVAL;
                goto end;
        }

        if (string_obj->is_frozen) {
                ret = BT_VALUE_STATUS_FROZEN;
                goto end;
        }

        g_string_assign(typed_string_obj->gstr, val);

end:
        return ret;
}

int bt_value_array_size(const struct bt_value *array_obj)
{
        int ret;
        struct bt_value_array *typed_array_obj =
                BT_VALUE_TO_ARRAY(array_obj);

        if (!array_obj || !bt_value_is_array(array_obj)) {
                ret = BT_VALUE_STATUS_INVAL;
                goto end;
        }

        ret = (int) typed_array_obj->garray->len;

end:
        return ret;
}

bool bt_value_array_is_empty(const struct bt_value *array_obj)
{
        return bt_value_array_size(array_obj) == 0;
}

struct bt_value *bt_value_array_get(const struct bt_value *array_obj,
        size_t index)
{
        struct bt_value *ret;
        struct bt_value_array *typed_array_obj =
                BT_VALUE_TO_ARRAY(array_obj);

        if (!array_obj || !bt_value_is_array(array_obj) ||
                        index >= typed_array_obj->garray->len) {
                ret = NULL;
                goto end;
        }

        ret = g_ptr_array_index(typed_array_obj->garray, index);
        bt_value_get(ret);

end:
        return ret;
}

enum bt_value_status bt_value_array_append(struct bt_value *array_obj,
        struct bt_value *element_obj)
{
        enum bt_value_status ret = BT_VALUE_STATUS_OK;
        struct bt_value_array *typed_array_obj =
                BT_VALUE_TO_ARRAY(array_obj);

        if (!array_obj || !bt_value_is_array(array_obj) || !element_obj) {
                ret = BT_VALUE_STATUS_INVAL;
                goto end;
        }

        if (array_obj->is_frozen) {
                ret = BT_VALUE_STATUS_FROZEN;
                goto end;
        }

        g_ptr_array_add(typed_array_obj->garray, element_obj);
        bt_value_get(element_obj);

end:
        return ret;
}

enum bt_value_status bt_value_array_append_bool(struct bt_value *array_obj,
        bool val)
{
        enum bt_value_status ret;
        struct bt_value *bool_obj = NULL;

        bool_obj = bt_value_bool_create_init(val);
        ret = bt_value_array_append(array_obj, bool_obj);
        bt_value_put(bool_obj);

        return ret;
}

enum bt_value_status bt_value_array_append_integer(
        struct bt_value *array_obj, int64_t val)
{
        enum bt_value_status ret;
        struct bt_value *integer_obj = NULL;

        integer_obj = bt_value_integer_create_init(val);
        ret = bt_value_array_append(array_obj, integer_obj);
        bt_value_put(integer_obj);

        return ret;
}

enum bt_value_status bt_value_array_append_float(struct bt_value *array_obj,
        double val)
{
        enum bt_value_status ret;
        struct bt_value *float_obj = NULL;

        float_obj = bt_value_float_create_init(val);
        ret = bt_value_array_append(array_obj, float_obj);
        bt_value_put(float_obj);

        return ret;
}

enum bt_value_status bt_value_array_append_string(struct bt_value *array_obj,
        const char *val)
{
        enum bt_value_status ret;
        struct bt_value *string_obj = NULL;

        string_obj = bt_value_string_create_init(val);
        ret = bt_value_array_append(array_obj, string_obj);
        bt_value_put(string_obj);

        return ret;
}

enum bt_value_status bt_value_array_append_array(struct bt_value *array_obj)
{
        enum bt_value_status ret;
        struct bt_value *empty_array_obj = NULL;

        empty_array_obj = bt_value_array_create();
        ret = bt_value_array_append(array_obj, empty_array_obj);
        bt_value_put(empty_array_obj);

        return ret;
}

enum bt_value_status bt_value_array_append_map(struct bt_value *array_obj)
{
        enum bt_value_status ret;
        struct bt_value *map_obj = NULL;

        map_obj = bt_value_map_create();
        ret = bt_value_array_append(array_obj, map_obj);
        bt_value_put(map_obj);

        return ret;
}

enum bt_value_status bt_value_array_set(struct bt_value *array_obj,
        size_t index, struct bt_value *element_obj)
{
        enum bt_value_status ret = BT_VALUE_STATUS_OK;
        struct bt_value_array *typed_array_obj =
                BT_VALUE_TO_ARRAY(array_obj);

        if (!array_obj || !bt_value_is_array(array_obj) || !element_obj ||
                        index >= typed_array_obj->garray->len) {
                ret = BT_VALUE_STATUS_INVAL;
                goto end;
        }

        if (array_obj->is_frozen) {
                ret = BT_VALUE_STATUS_FROZEN;
                goto end;
        }

        bt_value_put(g_ptr_array_index(typed_array_obj->garray, index));
        g_ptr_array_index(typed_array_obj->garray, index) = element_obj;
        bt_value_get(element_obj);

end:
        return ret;
}

int bt_value_map_size(const struct bt_value *map_obj)
{
        int ret;
        struct bt_value_map *typed_map_obj = BT_VALUE_TO_MAP(map_obj);

        if (!map_obj || !bt_value_is_map(map_obj)) {
                ret = BT_VALUE_STATUS_INVAL;
                goto end;
        }

        ret = (int) g_hash_table_size(typed_map_obj->ght);

end:
        return ret;
}

bool bt_value_map_is_empty(const struct bt_value *map_obj)
{
        return bt_value_map_size(map_obj) == 0;
}

struct bt_value *bt_value_map_get(const struct bt_value *map_obj,
        const char *key)
{
        GQuark quark;
        struct bt_value *ret;
        struct bt_value_map *typed_map_obj = BT_VALUE_TO_MAP(map_obj);

        if (!map_obj || !bt_value_is_map(map_obj) || !key) {
                ret = NULL;
                goto end;
        }

        quark = g_quark_from_string(key);
        ret = g_hash_table_lookup(typed_map_obj->ght, GUINT_TO_POINTER(quark));

        if (ret) {
                bt_value_get(ret);
        }

end:
        return ret;
}

bool bt_value_map_has_key(const struct bt_value *map_obj, const char *key)
{
        bool ret;
        GQuark quark;
        struct bt_value_map *typed_map_obj = BT_VALUE_TO_MAP(map_obj);

        if (!map_obj || !bt_value_is_map(map_obj) || !key) {
                ret = false;
                goto end;
        }

        quark = g_quark_from_string(key);
        ret = g_hash_table_contains(typed_map_obj->ght,
                GUINT_TO_POINTER(quark));

end:
        return ret;
}

enum bt_value_status bt_value_map_insert(struct bt_value *map_obj,
        const char *key, struct bt_value *element_obj)
{
        GQuark quark;
        enum bt_value_status ret = BT_VALUE_STATUS_OK;
        struct bt_value_map *typed_map_obj = BT_VALUE_TO_MAP(map_obj);

        if (!map_obj || !bt_value_is_map(map_obj) || !key || !element_obj) {
                ret = BT_VALUE_STATUS_INVAL;
                goto end;
        }

        if (map_obj->is_frozen) {
                ret = BT_VALUE_STATUS_FROZEN;
                goto end;
        }

        quark = g_quark_from_string(key);
        g_hash_table_insert(typed_map_obj->ght,
                GUINT_TO_POINTER(quark), element_obj);
        bt_value_get(element_obj);

end:
        return ret;
}

enum bt_value_status bt_value_map_insert_bool(struct bt_value *map_obj,
        const char *key, bool val)
{
        enum bt_value_status ret;
        struct bt_value *bool_obj = NULL;

        bool_obj = bt_value_bool_create_init(val);
        ret = bt_value_map_insert(map_obj, key, bool_obj);
        bt_value_put(bool_obj);

        return ret;
}

enum bt_value_status bt_value_map_insert_integer(struct bt_value *map_obj,
        const char *key, int64_t val)
{
        enum bt_value_status ret;
        struct bt_value *integer_obj = NULL;

        integer_obj = bt_value_integer_create_init(val);
        ret = bt_value_map_insert(map_obj, key, integer_obj);
        bt_value_put(integer_obj);

        return ret;
}

enum bt_value_status bt_value_map_insert_float(struct bt_value *map_obj,
        const char *key, double val)
{
        enum bt_value_status ret;
        struct bt_value *float_obj = NULL;

        float_obj = bt_value_float_create_init(val);
        ret = bt_value_map_insert(map_obj, key, float_obj);
        bt_value_put(float_obj);

        return ret;
}

enum bt_value_status bt_value_map_insert_string(struct bt_value *map_obj,
        const char *key, const char *val)
{
        enum bt_value_status ret;
        struct bt_value *string_obj = NULL;

        string_obj = bt_value_string_create_init(val);
        ret = bt_value_map_insert(map_obj, key, string_obj);
        bt_value_put(string_obj);

        return ret;
}

enum bt_value_status bt_value_map_insert_array(struct bt_value *map_obj,
        const char *key)
{
        enum bt_value_status ret;
        struct bt_value *array_obj = NULL;

        array_obj = bt_value_array_create();
        ret = bt_value_map_insert(map_obj, key, array_obj);
        bt_value_put(array_obj);

        return ret;
}

enum bt_value_status bt_value_map_insert_map(struct bt_value *map_obj,
        const char *key)
{
        enum bt_value_status ret;
        struct bt_value *empty_map_obj = NULL;

        empty_map_obj = bt_value_map_create();
        ret = bt_value_map_insert(map_obj, key, empty_map_obj);
        bt_value_put(empty_map_obj);

        return ret;
}

enum bt_value_status bt_value_map_foreach(const struct bt_value *map_obj,
        bt_value_map_foreach_cb cb, void *data)
{
        enum bt_value_status ret = BT_VALUE_STATUS_OK;
        gpointer key, element_obj;
        GHashTableIter iter;
        struct bt_value_map *typed_map_obj = BT_VALUE_TO_MAP(map_obj);

        if (!map_obj || !bt_value_is_map(map_obj) || !cb) {
                ret = BT_VALUE_STATUS_INVAL;
                goto end;
        }

        g_hash_table_iter_init(&iter, typed_map_obj->ght);

        while (g_hash_table_iter_next(&iter, &key, &element_obj)) {
                const char *key_str = g_quark_to_string((unsigned long) key);

                if (!cb(key_str, element_obj, data)) {
                        ret = BT_VALUE_STATUS_CANCELLED;
                        break;
                }
        }

end:
        return ret;
}

struct bt_value *bt_value_copy(const struct bt_value *object)
{
        struct bt_value *copy_obj = NULL;

        if (!object) {
                goto end;
        }

        copy_obj = copy_funcs[object->type](object);

end:
        return copy_obj;
}

bool bt_value_compare(const struct bt_value *object_a,
        const struct bt_value *object_b)
{
        bool ret = false;

        if (!object_a || !object_b) {
                goto end;
        }

        if (object_a->type != object_b->type) {
                goto end;
        }

        ret = compare_funcs[object_a->type](object_a, object_b);

end:
        return ret;
}