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| #include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#define NO_LETTER (1)
#define INVALID_VALUE (0xFFFFFFFF)
typedef enum {
reqargIndex = 0,
optargIndex,
noargIndex,
noletterIndex,
nullIndex
} option_index_t;
const struct option long_options[] =
{
{"reqarg", required_argument,NULL, 'r'},
{"optarg", optional_argument,NULL, 'o'},
{"noarg", no_argument, NULL,'n'},
{"noletter", no_argument, NULL, NO_LETTER },
{NULL, 0, NULL, NO_LETTER},
};
int a_val = INVALID_VALUE;
int b_val = INVALID_VALUE;
int c_val = INVALID_VALUE;
int d_val = INVALID_VALUE;
int r_val = INVALID_VALUE;
int o_val = INVALID_VALUE;
int n_val = INVALID_VALUE;
int no_letter = INVALID_VALUE;
int setOption(int opt, char *optarg, char *argv[], int option_index) {
switch(opt) {
case 'a':
if (optarg) {
a_val = atoi(optarg);
} else {
a_val = 1;
}
break;
case 'b':
{
b_val = atoi(optarg);
}
break;
case 'c':
c_val = atoi(optarg);
break;
case 'd':
d_val = 1;
if (optarg) {
printf("warnning:option d no require argument. ignore value %s\n", optarg);
}
break;
case 'r':
{
r_val = atoi(optarg);
}
break;
case 'o':
if (optarg) {
o_val = atoi(optarg);
} else {
o_val = 1;
}
break;
case 'n‘:
n_val = 1;
if (optarg) {
printf("warnning:option n no require argument. ignore value %s\n", optarg);
}
break;
case NO_LETTER:
{
switch(option_index) {
case noletterIndex:
no_letter = 1;
break;
case nullIndex:
break;
default:
break;
}
}
break;
default:
return 1;
}
return 0;
}
#define showV(x) printf(#x"=%d\n", x)
void showValues() {
printf("=========\n");
showV(a_val);
showV(b_val);
showV(c_val);
showV(d_val);
showV(r_val);
showV(o_val);
showV(n_val);
showV(no_letter);
printf("=========\n");
}
int main(int argc, char *argv[])
{
int opt;
int option_index = 0;
char *string = "a::b:c:dr:o::n";
//initValues();
while((opt =getopt_long_only(argc,argv,string,long_options,&option_index))!= -1)
{
printf("opt = %c\t\t", opt);
printf("optarg = %s\t\t",optarg);
printf("optind = %d\t\t",optind);
printf("argv[optind] =%s\t\t", argv[optind]);
printf("option_index = %d\n",option_index);
if (setOption(opt, optarg, argv, option_index)) {
showValues();
return -1;
}
}
showValues();
return 0;
}
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