tabexp.c

   1 #include "tabexp.h"
   2 #include "xmalloc.h"
   3 #include "xstrjoin.h"
   4 #include "debug.h"
   5
   6 #include <stdlib.h>
   7
   8 struct tabexp tabexp = {
   9         .head = NULL,
  10         .tails = NULL
  11 };
  12
  13 char *tabexp_expand(const char *src, void (*load_matches)(const char *src))
  14 {
  15         static int idx = 0;
  16         char *expanded;
  17
  18         if (tabexp.tails == NULL) {
  19                 load_matches(src);
  20                 if (tabexp.tails == NULL) {
  21                         BUG_ON(tabexp.head != NULL);
  22                         return NULL;
  23                 }
  24                 BUG_ON(tabexp.head == NULL);
  25                 idx = 0;
  26         }
  27
  28         expanded = xstrjoin(tabexp.head, tabexp.tails[idx++]);
  29         if (!tabexp.tails[idx])
  30                 idx = 0;
  31         if (!tabexp.tails[1])
  32                 tabexp_reset();
  33         return expanded;
  34 }
  35
  36 void tabexp_reset(void)
  37 {
  38         free_str_array(tabexp.tails);
  39         free(tabexp.head);
  40         tabexp.tails = NULL;
  41         tabexp.head = NULL;
  42 }