1#include "cache.h"
2#include "string-list.h"
3void string_list_init(struct string_list *list, int strdup_strings)
5{
6 memset(list, 0, sizeof(*list));
7 list->strdup_strings = strdup_strings;
8}
9/* if there is no exact match, point to the index where the entry could be
11 * inserted */
12static int get_entry_index(const struct string_list *list, const char *string,
13 int *exact_match)
14{
15 int left = -1, right = list->nr;
16 compare_strings_fn cmp = list->cmp ? list->cmp : strcmp;
17 while (left + 1 < right) {
19 int middle = (left + right) / 2;
20 int compare = cmp(string, list->items[middle].string);
21 if (compare < 0)
22 right = middle;
23 else if (compare > 0)
24 left = middle;
25 else {
26 *exact_match = 1;
27 return middle;
28 }
29 }
30 *exact_match = 0;
32 return right;
33}
34/* returns -1-index if already exists */
36static int add_entry(int insert_at, struct string_list *list, const char *string)
37{
38 int exact_match = 0;
39 int index = insert_at != -1 ? insert_at : get_entry_index(list, string, &exact_match);
40 if (exact_match)
42 return -1 - index;
43 if (list->nr + 1 >= list->alloc) {
45 list->alloc += 32;
46 REALLOC_ARRAY(list->items, list->alloc);
47 }
48 if (index < list->nr)
49 memmove(list->items + index + 1, list->items + index,
50 (list->nr - index)
51 * sizeof(struct string_list_item));
52 list->items[index].string = list->strdup_strings ?
53 xstrdup(string) : (char *)string;
54 list->items[index].util = NULL;
55 list->nr++;
56 return index;
58}
59struct string_list_item *string_list_insert(struct string_list *list, const char *string)
61{
62 int index = add_entry(-1, list, string);
63 if (index < 0)
65 index = -1 - index;
66 return list->items + index;
68}
69int string_list_has_string(const struct string_list *list, const char *string)
71{
72 int exact_match;
73 get_entry_index(list, string, &exact_match);
74 return exact_match;
75}
76int string_list_find_insert_index(const struct string_list *list, const char *string,
78 int negative_existing_index)
79{
80 int exact_match;
81 int index = get_entry_index(list, string, &exact_match);
82 if (exact_match)
83 index = -1 - (negative_existing_index ? index : 0);
84 return index;
85}
86struct string_list_item *string_list_lookup(struct string_list *list, const char *string)
88{
89 int exact_match, i = get_entry_index(list, string, &exact_match);
90 if (!exact_match)
91 return NULL;
92 return list->items + i;
93}
94void string_list_remove_duplicates(struct string_list *list, int free_util)
96{
97 if (list->nr > 1) {
98 int src, dst;
99 compare_strings_fn cmp = list->cmp ? list->cmp : strcmp;
100 for (src = dst = 1; src < list->nr; src++) {
101 if (!cmp(list->items[dst - 1].string, list->items[src].string)) {
102 if (list->strdup_strings)
103 free(list->items[src].string);
104 if (free_util)
105 free(list->items[src].util);
106 } else
107 list->items[dst++] = list->items[src];
108 }
109 list->nr = dst;
110 }
111}
112int for_each_string_list(struct string_list *list,
114 string_list_each_func_t fn, void *cb_data)
115{
116 int i, ret = 0;
117 for (i = 0; i < list->nr; i++)
118 if ((ret = fn(&list->items[i], cb_data)))
119 break;
120 return ret;
121}
122void filter_string_list(struct string_list *list, int free_util,
124 string_list_each_func_t want, void *cb_data)
125{
126 int src, dst = 0;
127 for (src = 0; src < list->nr; src++) {
128 if (want(&list->items[src], cb_data)) {
129 list->items[dst++] = list->items[src];
130 } else {
131 if (list->strdup_strings)
132 free(list->items[src].string);
133 if (free_util)
134 free(list->items[src].util);
135 }
136 }
137 list->nr = dst;
138}
139static int item_is_not_empty(struct string_list_item *item, void *unused)
141{
142 return *item->string != '\0';
143}
144void string_list_remove_empty_items(struct string_list *list, int free_util) {
146 filter_string_list(list, free_util, item_is_not_empty, NULL);
147}
148void string_list_clear(struct string_list *list, int free_util)
150{
151 if (list->items) {
152 int i;
153 if (list->strdup_strings) {
154 for (i = 0; i < list->nr; i++)
155 free(list->items[i].string);
156 }
157 if (free_util) {
158 for (i = 0; i < list->nr; i++)
159 free(list->items[i].util);
160 }
161 free(list->items);
162 }
163 list->items = NULL;
164 list->nr = list->alloc = 0;
165}
166void string_list_clear_func(struct string_list *list, string_list_clear_func_t clearfunc)
168{
169 if (list->items) {
170 int i;
171 if (clearfunc) {
172 for (i = 0; i < list->nr; i++)
173 clearfunc(list->items[i].util, list->items[i].string);
174 }
175 if (list->strdup_strings) {
176 for (i = 0; i < list->nr; i++)
177 free(list->items[i].string);
178 }
179 free(list->items);
180 }
181 list->items = NULL;
182 list->nr = list->alloc = 0;
183}
184void print_string_list(const struct string_list *p, const char *text)
187{
188 int i;
189 if ( text )
190 printf("%s\n", text);
191 for (i = 0; i < p->nr; i++)
192 printf("%s:%p\n", p->items[i].string, p->items[i].util);
193}
194struct string_list_item *string_list_append_nodup(struct string_list *list,
196 char *string)
197{
198 struct string_list_item *retval;
199 ALLOC_GROW(list->items, list->nr + 1, list->alloc);
200 retval = &list->items[list->nr++];
201 retval->string = string;
202 retval->util = NULL;
203 return retval;
204}
205struct string_list_item *string_list_append(struct string_list *list,
207 const char *string)
208{
209 return string_list_append_nodup(
210 list,
211 list->strdup_strings ? xstrdup(string) : (char *)string);
212}
213/* Yuck */
215static compare_strings_fn compare_for_qsort;
216/* Only call this from inside string_list_sort! */
218static int cmp_items(const void *a, const void *b)
219{
220 const struct string_list_item *one = a;
221 const struct string_list_item *two = b;
222 return compare_for_qsort(one->string, two->string);
223}
224void string_list_sort(struct string_list *list)
226{
227 compare_for_qsort = list->cmp ? list->cmp : strcmp;
228 qsort(list->items, list->nr, sizeof(*list->items), cmp_items);
229}
230struct string_list_item *unsorted_string_list_lookup(struct string_list *list,
232 const char *string)
233{
234 struct string_list_item *item;
235 compare_strings_fn cmp = list->cmp ? list->cmp : strcmp;
236 for_each_string_list_item(item, list)
238 if (!cmp(string, item->string))
239 return item;
240 return NULL;
241}
242int unsorted_string_list_has_string(struct string_list *list,
244 const char *string)
245{
246 return unsorted_string_list_lookup(list, string) != NULL;
247}
248void unsorted_string_list_delete_item(struct string_list *list, int i, int free_util)
250{
251 if (list->strdup_strings)
252 free(list->items[i].string);
253 if (free_util)
254 free(list->items[i].util);
255 list->items[i] = list->items[list->nr-1];
256 list->nr--;
257}
258int string_list_split(struct string_list *list, const char *string,
260 int delim, int maxsplit)
261{
262 int count = 0;
263 const char *p = string, *end;
264 if (!list->strdup_strings)
266 die("internal error in string_list_split(): "
267 "list->strdup_strings must be set");
268 for (;;) {
269 count++;
270 if (maxsplit >= 0 && count > maxsplit) {
271 string_list_append(list, p);
272 return count;
273 }
274 end = strchr(p, delim);
275 if (end) {
276 string_list_append_nodup(list, xmemdupz(p, end - p));
277 p = end + 1;
278 } else {
279 string_list_append(list, p);
280 return count;
281 }
282 }
283}
284int string_list_split_in_place(struct string_list *list, char *string,
286 int delim, int maxsplit)
287{
288 int count = 0;
289 char *p = string, *end;
290 if (list->strdup_strings)
292 die("internal error in string_list_split_in_place(): "
293 "list->strdup_strings must not be set");
294 for (;;) {
295 count++;
296 if (maxsplit >= 0 && count > maxsplit) {
297 string_list_append(list, p);
298 return count;
299 }
300 end = strchr(p, delim);
301 if (end) {
302 *end = '\0';
303 string_list_append(list, p);
304 p = end + 1;
305 } else {
306 string_list_append(list, p);
307 return count;
308 }
309 }
310}