?从网络上搜对应的代码不是很好找，参考了git的source code，修改了个建议的实现；方便后面在写命令的app时不重复造轮子；开源供大家参考；
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define BARF_UNLESS_AN_ARRAY(arr) 0
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]) + BARF_UNLESS_AN_ARRAY(x))
/*
struct of cmd list
*/
struct cmd_struct {
const char *cmd;
int (*fn)(int, const char **);
};
/*
call back function
*/
int cmd_add(int argc, const char **argv)
{
printf("add, %s", argv[1]);
return 1;
}
/*
call back function
*/
int cmd_test(int argc, const char **argv)
{
printf("test, %s", argv[1]);
return 1;
}
/*
add commands list below for function call
*/
static struct cmd_struct commands[] = {
{ "add", cmd_add },
{ "test", cmd_test },
};
/*
find the cmd from this function
*/
static struct cmd_struct *get_builtin(const char *s)
{
int i;
for (i = 0; i < ARRAY_SIZE(commands); i++) {
struct cmd_struct *p = commands + i;
if (!strcmp(s, p->cmd))
return p;
}
return NULL;
}
/*
call function cmd list
*/
static int run_builtin(struct cmd_struct *p, int argc, const char **argv)
{
int status = 0;
status = p->fn(argc, argv);
return status;
}
/*
main function
*/
int main(int argc, const char *argv[])
{
struct cmd_struct *builtin;
builtin = get_builtin(argv[1]);
if (builtin)
exit(!run_builtin(builtin, argc, argv));
return 1;
}
