[C] 3dArray

3dArray.c

char ***char3dArray(int length, int width, int height) {
    // ret[height][width][length]
    char ***ret = (char ***) malloc(sizeof(char **) * height + sizeof(char *) * height * width + sizeof(char) * height * width * length);

    char **first_row = (char **)(ret + height);
    char *first      = (char *)(first_row + height * width);
    memset(first, 0, sizeof(char) * height * width * length);

    for (int i=0, j, wl = width * length; i<height; ++i) {
        ret[i] = first_row + i * width;
        
        for (j=0; j<width; ++j) {
            ret[i][j] = first + i * wl + j * length;
        }
    }
    
    return ret;
}