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f331ab9d4c
Simplify the code for moving members inside of an array and make it more robust by using the helper macro MOVE_ARRAY. It calculates the size based on the specified number of elements for us and supports NULL pointers when that number is zero. Raw memmove(3) calls with NULL can cause the compiler to (over-eagerly) optimize out later NULL checks. This patch was generated with contrib/coccinelle/array.cocci and spatch (Coccinelle). Signed-off-by: Rene Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
320 lines
7.5 KiB
C
320 lines
7.5 KiB
C
#include "cache.h"
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#include "string-list.h"
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void string_list_init(struct string_list *list, int strdup_strings)
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{
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memset(list, 0, sizeof(*list));
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list->strdup_strings = strdup_strings;
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}
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/* if there is no exact match, point to the index where the entry could be
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* inserted */
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static int get_entry_index(const struct string_list *list, const char *string,
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int *exact_match)
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{
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int left = -1, right = list->nr;
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compare_strings_fn cmp = list->cmp ? list->cmp : strcmp;
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while (left + 1 < right) {
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int middle = (left + right) / 2;
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int compare = cmp(string, list->items[middle].string);
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if (compare < 0)
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right = middle;
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else if (compare > 0)
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left = middle;
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else {
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*exact_match = 1;
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return middle;
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}
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}
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*exact_match = 0;
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return right;
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}
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/* returns -1-index if already exists */
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static int add_entry(int insert_at, struct string_list *list, const char *string)
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{
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int exact_match = 0;
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int index = insert_at != -1 ? insert_at : get_entry_index(list, string, &exact_match);
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if (exact_match)
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return -1 - index;
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ALLOC_GROW(list->items, list->nr+1, list->alloc);
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if (index < list->nr)
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MOVE_ARRAY(list->items + index + 1, list->items + index,
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list->nr - index);
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list->items[index].string = list->strdup_strings ?
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xstrdup(string) : (char *)string;
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list->items[index].util = NULL;
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list->nr++;
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return index;
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}
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struct string_list_item *string_list_insert(struct string_list *list, const char *string)
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{
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int index = add_entry(-1, list, string);
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if (index < 0)
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index = -1 - index;
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return list->items + index;
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}
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void string_list_remove(struct string_list *list, const char *string,
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int free_util)
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{
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int exact_match;
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int i = get_entry_index(list, string, &exact_match);
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if (exact_match) {
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if (list->strdup_strings)
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free(list->items[i].string);
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if (free_util)
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free(list->items[i].util);
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list->nr--;
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MOVE_ARRAY(list->items + i, list->items + i + 1, list->nr - i);
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}
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}
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int string_list_has_string(const struct string_list *list, const char *string)
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{
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int exact_match;
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get_entry_index(list, string, &exact_match);
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return exact_match;
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}
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int string_list_find_insert_index(const struct string_list *list, const char *string,
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int negative_existing_index)
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{
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int exact_match;
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int index = get_entry_index(list, string, &exact_match);
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if (exact_match)
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index = -1 - (negative_existing_index ? index : 0);
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return index;
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}
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struct string_list_item *string_list_lookup(struct string_list *list, const char *string)
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{
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int exact_match, i = get_entry_index(list, string, &exact_match);
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if (!exact_match)
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return NULL;
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return list->items + i;
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}
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void string_list_remove_duplicates(struct string_list *list, int free_util)
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{
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if (list->nr > 1) {
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int src, dst;
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compare_strings_fn cmp = list->cmp ? list->cmp : strcmp;
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for (src = dst = 1; src < list->nr; src++) {
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if (!cmp(list->items[dst - 1].string, list->items[src].string)) {
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if (list->strdup_strings)
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free(list->items[src].string);
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if (free_util)
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free(list->items[src].util);
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} else
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list->items[dst++] = list->items[src];
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}
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list->nr = dst;
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}
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}
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int for_each_string_list(struct string_list *list,
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string_list_each_func_t fn, void *cb_data)
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{
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int i, ret = 0;
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for (i = 0; i < list->nr; i++)
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if ((ret = fn(&list->items[i], cb_data)))
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break;
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return ret;
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}
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void filter_string_list(struct string_list *list, int free_util,
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string_list_each_func_t want, void *cb_data)
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{
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int src, dst = 0;
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for (src = 0; src < list->nr; src++) {
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if (want(&list->items[src], cb_data)) {
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list->items[dst++] = list->items[src];
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} else {
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if (list->strdup_strings)
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free(list->items[src].string);
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if (free_util)
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free(list->items[src].util);
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}
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}
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list->nr = dst;
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}
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static int item_is_not_empty(struct string_list_item *item, void *unused)
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{
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return *item->string != '\0';
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}
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void string_list_remove_empty_items(struct string_list *list, int free_util) {
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filter_string_list(list, free_util, item_is_not_empty, NULL);
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}
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void string_list_clear(struct string_list *list, int free_util)
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{
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if (list->items) {
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int i;
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if (list->strdup_strings) {
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for (i = 0; i < list->nr; i++)
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free(list->items[i].string);
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}
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if (free_util) {
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for (i = 0; i < list->nr; i++)
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free(list->items[i].util);
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}
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free(list->items);
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}
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list->items = NULL;
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list->nr = list->alloc = 0;
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}
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void string_list_clear_func(struct string_list *list, string_list_clear_func_t clearfunc)
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{
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if (list->items) {
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int i;
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if (clearfunc) {
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for (i = 0; i < list->nr; i++)
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clearfunc(list->items[i].util, list->items[i].string);
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}
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if (list->strdup_strings) {
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for (i = 0; i < list->nr; i++)
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free(list->items[i].string);
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}
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free(list->items);
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}
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list->items = NULL;
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list->nr = list->alloc = 0;
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}
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void print_string_list(const struct string_list *p, const char *text)
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{
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int i;
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if ( text )
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printf("%s\n", text);
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for (i = 0; i < p->nr; i++)
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printf("%s:%p\n", p->items[i].string, p->items[i].util);
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}
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struct string_list_item *string_list_append_nodup(struct string_list *list,
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char *string)
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{
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struct string_list_item *retval;
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ALLOC_GROW(list->items, list->nr + 1, list->alloc);
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retval = &list->items[list->nr++];
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retval->string = string;
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retval->util = NULL;
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return retval;
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}
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struct string_list_item *string_list_append(struct string_list *list,
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const char *string)
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{
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return string_list_append_nodup(
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list,
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list->strdup_strings ? xstrdup(string) : (char *)string);
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}
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static int cmp_items(const void *a, const void *b, void *ctx)
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{
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compare_strings_fn cmp = ctx;
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const struct string_list_item *one = a;
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const struct string_list_item *two = b;
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return cmp(one->string, two->string);
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}
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void string_list_sort(struct string_list *list)
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{
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QSORT_S(list->items, list->nr, cmp_items,
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list->cmp ? list->cmp : strcmp);
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}
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struct string_list_item *unsorted_string_list_lookup(struct string_list *list,
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const char *string)
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{
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struct string_list_item *item;
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compare_strings_fn cmp = list->cmp ? list->cmp : strcmp;
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for_each_string_list_item(item, list)
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if (!cmp(string, item->string))
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return item;
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return NULL;
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}
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int unsorted_string_list_has_string(struct string_list *list,
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const char *string)
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{
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return unsorted_string_list_lookup(list, string) != NULL;
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}
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void unsorted_string_list_delete_item(struct string_list *list, int i, int free_util)
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{
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if (list->strdup_strings)
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free(list->items[i].string);
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if (free_util)
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free(list->items[i].util);
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list->items[i] = list->items[list->nr-1];
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list->nr--;
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}
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int string_list_split(struct string_list *list, const char *string,
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int delim, int maxsplit)
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{
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int count = 0;
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const char *p = string, *end;
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if (!list->strdup_strings)
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die("internal error in string_list_split(): "
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"list->strdup_strings must be set");
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for (;;) {
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count++;
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if (maxsplit >= 0 && count > maxsplit) {
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string_list_append(list, p);
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return count;
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}
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end = strchr(p, delim);
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if (end) {
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string_list_append_nodup(list, xmemdupz(p, end - p));
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p = end + 1;
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} else {
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string_list_append(list, p);
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return count;
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}
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}
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}
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int string_list_split_in_place(struct string_list *list, char *string,
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int delim, int maxsplit)
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{
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int count = 0;
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char *p = string, *end;
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if (list->strdup_strings)
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die("internal error in string_list_split_in_place(): "
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"list->strdup_strings must not be set");
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for (;;) {
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count++;
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if (maxsplit >= 0 && count > maxsplit) {
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string_list_append(list, p);
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return count;
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}
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end = strchr(p, delim);
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if (end) {
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*end = '\0';
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string_list_append(list, p);
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p = end + 1;
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} else {
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string_list_append(list, p);
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return count;
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}
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}
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}
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