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-rw-r--r--string-list.c311
1 files changed, 311 insertions, 0 deletions
diff --git a/string-list.c b/string-list.c
new file mode 100644
index 0000000000..aabb25ef4c
--- /dev/null
+++ b/string-list.c
@@ -0,0 +1,311 @@
+#include "cache.h"
+#include "string-list.h"
+
+/* if there is no exact match, point to the index where the entry could be
+ * inserted */
+static int get_entry_index(const struct string_list *list, const char *string,
+ int *exact_match)
+{
+ int left = -1, right = list->nr;
+ compare_strings_fn cmp = list->cmp ? list->cmp : strcmp;
+
+ while (left + 1 < right) {
+ int middle = (left + right) / 2;
+ int compare = cmp(string, list->items[middle].string);
+ if (compare < 0)
+ right = middle;
+ else if (compare > 0)
+ left = middle;
+ else {
+ *exact_match = 1;
+ return middle;
+ }
+ }
+
+ *exact_match = 0;
+ return right;
+}
+
+/* returns -1-index if already exists */
+static int add_entry(int insert_at, struct string_list *list, const char *string)
+{
+ int exact_match = 0;
+ int index = insert_at != -1 ? insert_at : get_entry_index(list, string, &exact_match);
+
+ if (exact_match)
+ return -1 - index;
+
+ if (list->nr + 1 >= list->alloc) {
+ list->alloc += 32;
+ list->items = xrealloc(list->items, list->alloc
+ * sizeof(struct string_list_item));
+ }
+ if (index < list->nr)
+ memmove(list->items + index + 1, list->items + index,
+ (list->nr - index)
+ * sizeof(struct string_list_item));
+ list->items[index].string = list->strdup_strings ?
+ xstrdup(string) : (char *)string;
+ list->items[index].util = NULL;
+ list->nr++;
+
+ return index;
+}
+
+struct string_list_item *string_list_insert(struct string_list *list, const char *string)
+{
+ return string_list_insert_at_index(list, -1, string);
+}
+
+struct string_list_item *string_list_insert_at_index(struct string_list *list,
+ int insert_at, const char *string)
+{
+ int index = add_entry(insert_at, list, string);
+
+ if (index < 0)
+ index = -1 - index;
+
+ return list->items + index;
+}
+
+int string_list_has_string(const struct string_list *list, const char *string)
+{
+ int exact_match;
+ get_entry_index(list, string, &exact_match);
+ return exact_match;
+}
+
+int string_list_find_insert_index(const struct string_list *list, const char *string,
+ int negative_existing_index)
+{
+ int exact_match;
+ int index = get_entry_index(list, string, &exact_match);
+ if (exact_match)
+ index = -1 - (negative_existing_index ? index : 0);
+ return index;
+}
+
+struct string_list_item *string_list_lookup(struct string_list *list, const char *string)
+{
+ int exact_match, i = get_entry_index(list, string, &exact_match);
+ if (!exact_match)
+ return NULL;
+ return list->items + i;
+}
+
+void string_list_remove_duplicates(struct string_list *list, int free_util)
+{
+ if (list->nr > 1) {
+ int src, dst;
+ compare_strings_fn cmp = list->cmp ? list->cmp : strcmp;
+ for (src = dst = 1; src < list->nr; src++) {
+ if (!cmp(list->items[dst - 1].string, list->items[src].string)) {
+ if (list->strdup_strings)
+ free(list->items[src].string);
+ if (free_util)
+ free(list->items[src].util);
+ } else
+ list->items[dst++] = list->items[src];
+ }
+ list->nr = dst;
+ }
+}
+
+int for_each_string_list(struct string_list *list,
+ string_list_each_func_t fn, void *cb_data)
+{
+ int i, ret = 0;
+ for (i = 0; i < list->nr; i++)
+ if ((ret = fn(&list->items[i], cb_data)))
+ break;
+ return ret;
+}
+
+void filter_string_list(struct string_list *list, int free_util,
+ string_list_each_func_t want, void *cb_data)
+{
+ int src, dst = 0;
+ for (src = 0; src < list->nr; src++) {
+ if (want(&list->items[src], cb_data)) {
+ list->items[dst++] = list->items[src];
+ } else {
+ if (list->strdup_strings)
+ free(list->items[src].string);
+ if (free_util)
+ free(list->items[src].util);
+ }
+ }
+ list->nr = dst;
+}
+
+static int item_is_not_empty(struct string_list_item *item, void *unused)
+{
+ return *item->string != '\0';
+}
+
+void string_list_remove_empty_items(struct string_list *list, int free_util) {
+ filter_string_list(list, free_util, item_is_not_empty, NULL);
+}
+
+void string_list_clear(struct string_list *list, int free_util)
+{
+ if (list->items) {
+ int i;
+ if (list->strdup_strings) {
+ for (i = 0; i < list->nr; i++)
+ free(list->items[i].string);
+ }
+ if (free_util) {
+ for (i = 0; i < list->nr; i++)
+ free(list->items[i].util);
+ }
+ free(list->items);
+ }
+ list->items = NULL;
+ list->nr = list->alloc = 0;
+}
+
+void string_list_clear_func(struct string_list *list, string_list_clear_func_t clearfunc)
+{
+ if (list->items) {
+ int i;
+ if (clearfunc) {
+ for (i = 0; i < list->nr; i++)
+ clearfunc(list->items[i].util, list->items[i].string);
+ }
+ if (list->strdup_strings) {
+ for (i = 0; i < list->nr; i++)
+ free(list->items[i].string);
+ }
+ free(list->items);
+ }
+ list->items = NULL;
+ list->nr = list->alloc = 0;
+}
+
+
+void print_string_list(const struct string_list *p, const char *text)
+{
+ int i;
+ if ( text )
+ printf("%s\n", text);
+ for (i = 0; i < p->nr; i++)
+ printf("%s:%p\n", p->items[i].string, p->items[i].util);
+}
+
+struct string_list_item *string_list_append_nodup(struct string_list *list,
+ char *string)
+{
+ struct string_list_item *retval;
+ ALLOC_GROW(list->items, list->nr + 1, list->alloc);
+ retval = &list->items[list->nr++];
+ retval->string = string;
+ retval->util = NULL;
+ return retval;
+}
+
+struct string_list_item *string_list_append(struct string_list *list,
+ const char *string)
+{
+ return string_list_append_nodup(
+ list,
+ list->strdup_strings ? xstrdup(string) : (char *)string);
+}
+
+/* Yuck */
+static compare_strings_fn compare_for_qsort;
+
+/* Only call this from inside sort_string_list! */
+static int cmp_items(const void *a, const void *b)
+{
+ const struct string_list_item *one = a;
+ const struct string_list_item *two = b;
+ return compare_for_qsort(one->string, two->string);
+}
+
+void sort_string_list(struct string_list *list)
+{
+ compare_for_qsort = list->cmp ? list->cmp : strcmp;
+ qsort(list->items, list->nr, sizeof(*list->items), cmp_items);
+}
+
+struct string_list_item *unsorted_string_list_lookup(struct string_list *list,
+ const char *string)
+{
+ int i;
+ compare_strings_fn cmp = list->cmp ? list->cmp : strcmp;
+
+ for (i = 0; i < list->nr; i++)
+ if (!cmp(string, list->items[i].string))
+ return list->items + i;
+ return NULL;
+}
+
+int unsorted_string_list_has_string(struct string_list *list,
+ const char *string)
+{
+ return unsorted_string_list_lookup(list, string) != NULL;
+}
+
+void unsorted_string_list_delete_item(struct string_list *list, int i, int free_util)
+{
+ if (list->strdup_strings)
+ free(list->items[i].string);
+ if (free_util)
+ free(list->items[i].util);
+ list->items[i] = list->items[list->nr-1];
+ list->nr--;
+}
+
+int string_list_split(struct string_list *list, const char *string,
+ int delim, int maxsplit)
+{
+ int count = 0;
+ const char *p = string, *end;
+
+ if (!list->strdup_strings)
+ die("internal error in string_list_split(): "
+ "list->strdup_strings must be set");
+ for (;;) {
+ count++;
+ if (maxsplit >= 0 && count > maxsplit) {
+ string_list_append(list, p);
+ return count;
+ }
+ end = strchr(p, delim);
+ if (end) {
+ string_list_append_nodup(list, xmemdupz(p, end - p));
+ p = end + 1;
+ } else {
+ string_list_append(list, p);
+ return count;
+ }
+ }
+}
+
+int string_list_split_in_place(struct string_list *list, char *string,
+ int delim, int maxsplit)
+{
+ int count = 0;
+ char *p = string, *end;
+
+ if (list->strdup_strings)
+ die("internal error in string_list_split_in_place(): "
+ "list->strdup_strings must not be set");
+ for (;;) {
+ count++;
+ if (maxsplit >= 0 && count > maxsplit) {
+ string_list_append(list, p);
+ return count;
+ }
+ end = strchr(p, delim);
+ if (end) {
+ *end = '\0';
+ string_list_append(list, p);
+ p = end + 1;
+ } else {
+ string_list_append(list, p);
+ return count;
+ }
+ }
+}
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