timer: handle time going backwards.
[ccan] / ccan / asort / _info
1 #include "config.h"
2 #include <stdio.h>
3 #include <string.h>
4
5 /**
6  * asort - typesafe array sort (qsort)
7  *
8  * qsort() is the standard routine for sorting an array of objects.
9  * Unfortunately, it has two problems:
10  *     1) It isn't typesafe,
11  *     2) The comparison function doesn't take a context pointer.
12  *
13  * asort does both.
14  *
15  * License: LGPL (v2.1 or any later version)
16  * Author: Rusty Russell <rusty@rustcorp.com.au>
17  *
18  * Example:
19  *      #include <ccan/asort/asort.h>
20  *      #include <stdio.h>
21  *      #include <string.h>
22  *      
23  *      static int cmp(char *const *a, char *const *n, bool *casefold)
24  *      {
25  *              if (*casefold)
26  *                      return strcasecmp(*a, *n);
27  *              else
28  *                      return strcmp(*a, *n);
29  *      }
30  *      
31  *      int main(int argc, char *argv[])
32  *      {
33  *              bool casefold = false;
34  *              int i;
35  *      
36  *              if (argc < 2) {
37  *                      fprintf(stderr, "Usage: %s [-i] <list>...\n"
38  *                              "Sort arguments (-i = ignore case)\n",
39  *                              argv[0]);
40  *                      exit(1);
41  *              }
42  *      
43  *              if (strcmp(argv[1], "-i") == 0) {
44  *                      casefold = true;
45  *                      argc--;
46  *                      argv++;
47  *              }
48  *              asort(&argv[1], argc-1, cmp, &casefold);
49  *              for (i = 1; i < argc; i++)
50  *                      printf("%s ", argv[i]);
51  *              printf("\n");
52  *              return 0;
53  *      }
54  */
55 int main(int argc, char *argv[])
56 {
57         if (argc != 2)
58                 return 1;
59
60         if (strcmp(argv[1], "depends") == 0) {
61                 printf("ccan/order\n");
62                 return 0;
63         }
64         if (strcmp(argv[1], "testdepends") == 0) {
65                 printf("ccan/array_size\n");
66                 return 0;
67         }
68
69         return 1;
70 }