C++ (Cpp) enif_map_iterator_next示例

示例#1

文件： encoder.c 项目： nevar/jiffy

static int
enc_map_to_ejson(ErlNifEnv* env, ERL_NIF_TERM map, ERL_NIF_TERM* out)
{
    ErlNifMapIterator iter;
    size_t size;

    ERL_NIF_TERM list;
    ERL_NIF_TERM tuple;
    ERL_NIF_TERM key;
    ERL_NIF_TERM val;

    if(!enif_get_map_size(env, map, &size)) {
        fprintf(stderr, "bad map size\r\n");
        return 0;
    }

    list = enif_make_list(env, 0);

    if(size == 0) {
        *out = enif_make_list_cell(env, enif_make_tuple(env, 0), list);
        return 1;
    }

    if(!enif_map_iterator_create(env, map, &iter, ERL_NIF_MAP_ITERATOR_HEAD)) {
        fprintf(stderr, "bad iterator create\r\n");
        return 0;
    }

    do {
        if(!enif_map_iterator_get_pair(env, &iter, &key, &val)) {
            fprintf(stderr, "bad get pair\r\n");
            return 0;
        }
        tuple = enif_make_tuple2(env, key, val);
        list = enif_make_list_cell(env, tuple, list);
    } while(enif_map_iterator_next(env, &iter));

    *out = list;
    return 1;
}

示例#2

文件： encoder.c 项目： DLive/rest-edoc

int
enc_map_to_ejson(ErlNifEnv* env, ERL_NIF_TERM map, ERL_NIF_TERM* out)
{
    ErlNifMapIterator iter;
    size_t size;

    ERL_NIF_TERM list;
    ERL_NIF_TERM tuple;
    ERL_NIF_TERM key;
    ERL_NIF_TERM val;

    if(!enif_get_map_size(env, map, &size)) {
        return 0;
    }

    list = enif_make_list(env, 0);

    if(size == 0) {
        *out = enif_make_tuple1(env, list);
        return 1;
    }

    if(!enif_map_iterator_create(env, map, &iter, ERL_NIF_MAP_ITERATOR_HEAD)) {
        return 0;
    }

    do {
        if(!enif_map_iterator_get_pair(env, &iter, &key, &val)) {
            enif_map_iterator_destroy(env, &iter);
            return 0;
        }
        tuple = enif_make_tuple2(env, key, val);
        list = enif_make_list_cell(env, tuple, list);
    } while(enif_map_iterator_next(env, &iter));

    enif_map_iterator_destroy(env, &iter);

    *out = enif_make_tuple1(env, list);
    return 1;
}