wmthemech/src/stringlist.c

   1 #include <config.h>
   2
   3 #include <stdlib.h>
   4 #include <stdio.h>
   5 #include <string.h> /* memcpy */
   6
   7 #define BASE_SIZE 1024
   8
   9 struct string_list_t {
  10         unsigned int size;
  11         unsigned int used;
  12         int * item;
  13 };
  14
  15
  16 struct string_list_t *
  17 create_list ()
  18 {
  19         struct string_list_t * list = (struct string_list_t *)
  20                 malloc (sizeof (struct string_list_t) );
  21         list->item = malloc (BASE_SIZE * sizeof (int) );
  22         list->size = BASE_SIZE;
  23         list->used = 0;
  24
  25         return list;
  26 }
  27
  28
  29 void
  30 delete_list (struct string_list_t * list)
  31 {
  32         free (list->item);
  33 }
  34
  35
  36 int
  37 get_item (struct string_list_t * list, unsigned int item)
  38 {
  39         return ( item >= list->used) ? -1 : list->item[item];
  40 }
  41
  42
  43 int
  44 add_item (struct string_list_t * list, unsigned int item)
  45 {
  46         if (list->used == list->size) {
  47                 list->size += BASE_SIZE;
  48                 list->item = realloc (list->item, list->size * sizeof (int) );
  49         }
  50
  51         list->item[list->used++] = item;
  52
  53         return 0;
  54 }
  55
  56
  57 int
  58 add_list (struct string_list_t * dst, struct string_list_t * src)
  59 {
  60         if (dst->used + src->used > dst->size) {
  61                 dst->size = dst->used + src->used;
  62                 dst->item = realloc (dst->item, dst->size * sizeof (int) );
  63         }
  64
  65         memcpy (&dst->item[dst->used], src->item, src->used * sizeof (int) );
  66         dst->used += src->used;
  67
  68         return 0;
  69 }