Andrew's git - gitweb.git/blob

   1#include "cache.h"
   2#include "string-list.h"
   3
   4/* if there is no exact match, point to the index where the entry could be
   5 * inserted */
   6static int get_entry_index(const struct string_list *list, const char *string,
   7                int *exact_match)
   8{
   9        int left = -1, right = list->nr;
  10
  11        while (left + 1 < right) {
  12                int middle = (left + right) / 2;
  13                int compare = strcmp(string, list->items[middle].string);
  14                if (compare < 0)
  15                        right = middle;
  16                else if (compare > 0)
  17                        left = middle;
  18                else {
  19                        *exact_match = 1;
  20                        return middle;
  21                }
  22        }
  23
  24        *exact_match = 0;
  25        return right;
  26}
  27
  28/* returns -1-index if already exists */
  29static int add_entry(struct string_list *list, const char *string)
  30{
  31        int exact_match;
  32        int index = get_entry_index(list, string, &exact_match);
  33
  34        if (exact_match)
  35                return -1 - index;
  36
  37        if (list->nr + 1 >= list->alloc) {
  38                list->alloc += 32;
  39                list->items = xrealloc(list->items, list->alloc
  40                                * sizeof(struct string_list_item));
  41        }
  42        if (index < list->nr)
  43                memmove(list->items + index + 1, list->items + index,
  44                                (list->nr - index)
  45                                * sizeof(struct string_list_item));
  46        list->items[index].string = list->strdup_strings ?
  47                xstrdup(string) : (char *)string;
  48        list->items[index].util = NULL;
  49        list->nr++;
  50
  51        return index;
  52}
  53
  54struct string_list_item *string_list_insert(const char *string, struct string_list *list)
  55{
  56        int index = add_entry(list, string);
  57
  58        if (index < 0)
  59                index = -1 - index;
  60
  61        return list->items + index;
  62}
  63
  64int string_list_has_string(const struct string_list *list, const char *string)
  65{
  66        int exact_match;
  67        get_entry_index(list, string, &exact_match);
  68        return exact_match;
  69}
  70
  71struct string_list_item *string_list_lookup(const char *string, struct string_list *list)
  72{
  73        int exact_match, i = get_entry_index(list, string, &exact_match);
  74        if (!exact_match)
  75                return NULL;
  76        return list->items + i;
  77}
  78
  79void string_list_clear(struct string_list *list, int free_util)
  80{
  81        if (list->items) {
  82                int i;
  83                if (list->strdup_strings) {
  84                        for (i = 0; i < list->nr; i++)
  85                                free(list->items[i].string);
  86                }
  87                if (free_util) {
  88                        for (i = 0; i < list->nr; i++)
  89                                free(list->items[i].util);
  90                }
  91                free(list->items);
  92        }
  93        list->items = NULL;
  94        list->nr = list->alloc = 0;
  95}
  96
  97void print_string_list(const char *text, const struct string_list *p)
  98{
  99        int i;
 100        if ( text )
 101                printf("%s\n", text);
 102        for (i = 0; i < p->nr; i++)
 103                printf("%s:%p\n", p->items[i].string, p->items[i].util);
 104}
 105
 106struct string_list_item *string_list_append(const char *string, struct string_list *list)
 107{
 108        ALLOC_GROW(list->items, list->nr + 1, list->alloc);
 109        list->items[list->nr].string =
 110                list->strdup_strings ? xstrdup(string) : (char *)string;
 111        return list->items + list->nr++;
 112}
 113
 114static int cmp_items(const void *a, const void *b)
 115{
 116        const struct string_list_item *one = a;
 117        const struct string_list_item *two = b;
 118        return strcmp(one->string, two->string);
 119}
 120
 121void sort_string_list(struct string_list *list)
 122{
 123        qsort(list->items, list->nr, sizeof(*list->items), cmp_items);
 124}
 125
 126int unsorted_string_list_has_string(struct string_list *list, const char *string)
 127{
 128        int i;
 129        for (i = 0; i < list->nr; i++)
 130                if (!strcmp(string, list->items[i].string))
 131                        return 1;
 132        return 0;
 133}
 134