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[git/git.git] / string-list.c
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c455c87c
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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 */
cfa1ee6b 29static int add_entry(int insert_at, struct string_list *list, const char *string)
c455c87c 30{
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31 int exact_match = 0;
32 int index = insert_at != -1 ? insert_at : get_entry_index(list, string, &exact_match);
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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
78a395d3 54struct string_list_item *string_list_insert(struct string_list *list, const char *string)
c455c87c 55{
aadceea6 56 return string_list_insert_at_index(list, -1, string);
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57}
58
aadceea6
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59struct string_list_item *string_list_insert_at_index(struct string_list *list,
60 int insert_at, const char *string)
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61{
62 int index = add_entry(insert_at, list, string);
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63
64 if (index < 0)
65 index = -1 - index;
66
67 return list->items + index;
68}
69
70int 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}
76
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77int 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}
86
e8c8b713 87struct string_list_item *string_list_lookup(struct string_list *list, const char *string)
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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}
94
31d5451e
MH
95void string_list_remove_duplicates(struct string_list *list, int free_util)
96{
97 if (list->nr > 1) {
98 int src, dst;
99 for (src = dst = 1; src < list->nr; src++) {
100 if (!strcmp(list->items[dst - 1].string, list->items[src].string)) {
101 if (list->strdup_strings)
102 free(list->items[src].string);
103 if (free_util)
104 free(list->items[src].util);
105 } else
106 list->items[dst++] = list->items[src];
107 }
108 list->nr = dst;
109 }
110}
111
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112int for_each_string_list(struct string_list *list,
113 string_list_each_func_t fn, void *cb_data)
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114{
115 int i, ret = 0;
116 for (i = 0; i < list->nr; i++)
117 if ((ret = fn(&list->items[i], cb_data)))
118 break;
119 return ret;
120}
121
eb5f0c7a
MH
122void filter_string_list(struct string_list *list, int free_util,
123 string_list_each_func_t want, void *cb_data)
124{
125 int src, dst = 0;
126 for (src = 0; src < list->nr; src++) {
127 if (want(&list->items[src], cb_data)) {
128 list->items[dst++] = list->items[src];
129 } else {
130 if (list->strdup_strings)
131 free(list->items[src].string);
132 if (free_util)
133 free(list->items[src].util);
134 }
135 }
136 list->nr = dst;
137}
138
6bb2a137
MH
139static int item_is_not_empty(struct string_list_item *item, void *unused)
140{
141 return *item->string != '\0';
142}
143
144void string_list_remove_empty_items(struct string_list *list, int free_util) {
145 filter_string_list(list, free_util, item_is_not_empty, NULL);
146}
147
f103f95b
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148char *string_list_longest_prefix(const struct string_list *prefixes,
149 const char *string)
150{
151 int i, max_len = -1;
152 char *retval = NULL;
153
154 for (i = 0; i < prefixes->nr; i++) {
155 char *prefix = prefixes->items[i].string;
156 if (!prefixcmp(string, prefix)) {
157 int len = strlen(prefix);
158 if (len > max_len) {
159 retval = prefix;
160 max_len = len;
161 }
162 }
163 }
164
165 return retval;
166}
167
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168void string_list_clear(struct string_list *list, int free_util)
169{
170 if (list->items) {
171 int i;
172 if (list->strdup_strings) {
173 for (i = 0; i < list->nr; i++)
174 free(list->items[i].string);
175 }
176 if (free_util) {
177 for (i = 0; i < list->nr; i++)
178 free(list->items[i].util);
179 }
180 free(list->items);
181 }
182 list->items = NULL;
183 list->nr = list->alloc = 0;
184}
185
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186void string_list_clear_func(struct string_list *list, string_list_clear_func_t clearfunc)
187{
188 if (list->items) {
189 int i;
190 if (clearfunc) {
191 for (i = 0; i < list->nr; i++)
192 clearfunc(list->items[i].util, list->items[i].string);
193 }
194 if (list->strdup_strings) {
195 for (i = 0; i < list->nr; i++)
196 free(list->items[i].string);
197 }
198 free(list->items);
199 }
200 list->items = NULL;
201 list->nr = list->alloc = 0;
202}
203
204
cb944f6b 205void print_string_list(const struct string_list *p, const char *text)
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206{
207 int i;
208 if ( text )
209 printf("%s\n", text);
210 for (i = 0; i < p->nr; i++)
211 printf("%s:%p\n", p->items[i].string, p->items[i].util);
212}
213
e448fed8
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214struct string_list_item *string_list_append_nodup(struct string_list *list,
215 char *string)
c455c87c 216{
e448fed8 217 struct string_list_item *retval;
c455c87c 218 ALLOC_GROW(list->items, list->nr + 1, list->alloc);
e448fed8
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219 retval = &list->items[list->nr++];
220 retval->string = string;
221 retval->util = NULL;
222 return retval;
223}
224
225struct string_list_item *string_list_append(struct string_list *list,
226 const char *string)
227{
228 return string_list_append_nodup(
229 list,
230 list->strdup_strings ? xstrdup(string) : (char *)string);
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231}
232
233static int cmp_items(const void *a, const void *b)
234{
235 const struct string_list_item *one = a;
236 const struct string_list_item *two = b;
237 return strcmp(one->string, two->string);
238}
239
240void sort_string_list(struct string_list *list)
241{
242 qsort(list->items, list->nr, sizeof(*list->items), cmp_items);
243}
244
e2421480
SB
245struct string_list_item *unsorted_string_list_lookup(struct string_list *list,
246 const char *string)
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247{
248 int i;
249 for (i = 0; i < list->nr; i++)
250 if (!strcmp(string, list->items[i].string))
e2421480
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251 return list->items + i;
252 return NULL;
253}
254
255int unsorted_string_list_has_string(struct string_list *list,
256 const char *string)
257{
258 return unsorted_string_list_lookup(list, string) != NULL;
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259}
260
86d4b528
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261void unsorted_string_list_delete_item(struct string_list *list, int i, int free_util)
262{
263 if (list->strdup_strings)
264 free(list->items[i].string);
265 if (free_util)
266 free(list->items[i].util);
267 list->items[i] = list->items[list->nr-1];
268 list->nr--;
269}
ff919f96
MH
270
271int string_list_split(struct string_list *list, const char *string,
272 int delim, int maxsplit)
273{
274 int count = 0;
275 const char *p = string, *end;
276
277 if (!list->strdup_strings)
278 die("internal error in string_list_split(): "
279 "list->strdup_strings must be set");
280 for (;;) {
281 count++;
282 if (maxsplit >= 0 && count > maxsplit) {
283 string_list_append(list, p);
284 return count;
285 }
286 end = strchr(p, delim);
287 if (end) {
288 string_list_append_nodup(list, xmemdupz(p, end - p));
289 p = end + 1;
290 } else {
291 string_list_append(list, p);
292 return count;
293 }
294 }
295}
296
297int string_list_split_in_place(struct string_list *list, char *string,
298 int delim, int maxsplit)
299{
300 int count = 0;
301 char *p = string, *end;
302
303 if (list->strdup_strings)
304 die("internal error in string_list_split_in_place(): "
305 "list->strdup_strings must not be set");
306 for (;;) {
307 count++;
308 if (maxsplit >= 0 && count > maxsplit) {
309 string_list_append(list, p);
310 return count;
311 }
312 end = strchr(p, delim);
313 if (end) {
314 *end = '\0';
315 string_list_append(list, p);
316 p = end + 1;
317 } else {
318 string_list_append(list, p);
319 return count;
320 }
321 }
322}