文件名称：定义用户自己的堆栈函数-typescript deep dive 无水印原版pdf
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更新时间：2024-06-30 06:33:04
openssl编程
3.4 定义用户自己的堆栈函数 用户直接调用 底层的堆栈操作函数是一个麻烦的事情，对此 openssl 提供了用宏 来帮助用户实现接口。用户可以参考 safestack.h 来定义自己的上层堆栈操作函数，举例 如下，safestack.h 定义了如下关于 GENERAL_NAME 数据结构的堆栈操作： #define sk_GENERAL_NAME_new(st) SKM_sk_new(GENERAL_NAME, (st)) #define sk_GENERAL_NAME_new_null() SKM_sk_new_null(GENERAL_NAME) #define sk_GENERAL_NAME_free(st) SKM_sk_free(GENERAL_NAME, (st)) #define sk_GENERAL_NAME_num(st) SKM_sk_num(GENERAL_NAME, (st)) #define sk_GENERAL_NAME_value(st, i) SKM_sk_value(GENERAL_NAME, (st), (i)) #define sk_GENERAL_NAME_set(st, i, val) SKM_sk_set(GENERAL_NAME, (st), (i), (val)) #define sk_GENERAL_NAME_zero(st) SKM_sk_zero(GENERAL_NAME, (st)) #define sk_GENERAL_NAME_push(st, val) SKM_sk_push(GENERAL_NAME, (st), (val)) #define sk_GENERAL_NAME_unshift(st, val) SKM_sk_unshift(GENERAL_NAME, (st), (val)) #define sk_GENERAL_NAME_find(st, val) SKM_sk_find(GENERAL_NAME, (st), (val)) #define sk_GENERAL_NAME_find_ex(st, val) SKM_sk_find_ex(GENERAL_NAME, (st), (val)) #define sk_GENERAL_NAME_delete(st, i) SKM_sk_delete(GENERAL_NAME, (st), (i)) #define sk_GENERAL_NAME_delete_ptr(st, ptr) SKM_sk_delete_ptr(GENERAL_NAME, (st), (ptr)) #define sk_GENERAL_NAME_insert(st, val, i) SKM_sk_insert(GENERAL_NAME, (st), (val), (i)) #define sk_GENERAL_NAME_set_cmp_func(st, cmp) SKM_sk_set_cmp_func(GENERAL_NAME, (st), (cmp)) #define sk_GENERAL_NAME_dup(st) SKM_sk_dup(GENERAL_NAME, st) #define sk_GENERAL_NAME_pop_free(st, free_func) SKM_sk_pop_free(GENERAL_NAME, (st), (free_func)) #define sk_GENERAL_NAME_shift(st) SKM_sk_shift(GENERAL_NAME, (st)) #define sk_GENERAL_NAME_pop(st) SKM_sk_pop(GENERAL_NAME, (st)) #define sk_GENERAL_NAME_sort(st) SKM_sk_sort(GENERAL_NAME, (st)) #define sk_GENERAL_NAME_is_sorted(st) SKM_sk_is_sorted(GENERAL_NAME, (st)) 当用户想对 GENERAL_NAME 数据进行堆栈操作时，调用上面由宏定义的函数即可， 即直观又方便。比如用户想设置堆栈数据的比较函数和对堆栈排序时，他分别调用： sk_GENERAL_NAME_set_cmp_func 和 sk_GENERAL_NAME_sort。