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Diffstat (limited to 'third_party/git/string-list.h')
| -rw-r--r-- | third_party/git/string-list.h | 264 |
1 files changed, 0 insertions, 264 deletions
diff --git a/third_party/git/string-list.h b/third_party/git/string-list.h deleted file mode 100644 index f964399949..0000000000 --- a/third_party/git/string-list.h +++ /dev/null @@ -1,264 +0,0 @@ -#ifndef STRING_LIST_H -#define STRING_LIST_H - -/** - * The string_list API offers a data structure and functions to handle - * sorted and unsorted arrays of strings. A "sorted" list is one whose - * entries are sorted by string value in `strcmp()` order. - * - * The caller: - * - * . Allocates and clears a `struct string_list` variable. - * - * . Initializes the members. You might want to set the flag `strdup_strings` - * if the strings should be strdup()ed. For example, this is necessary - * when you add something like git_path("..."), since that function returns - * a static buffer that will change with the next call to git_path(). - * - * If you need something advanced, you can manually malloc() the `items` - * member (you need this if you add things later) and you should set the - * `nr` and `alloc` members in that case, too. - * - * . Adds new items to the list, using `string_list_append`, - * `string_list_append_nodup`, `string_list_insert`, - * `string_list_split`, and/or `string_list_split_in_place`. - * - * . Can check if a string is in the list using `string_list_has_string` or - * `unsorted_string_list_has_string` and get it from the list using - * `string_list_lookup` for sorted lists. - * - * . Can sort an unsorted list using `string_list_sort`. - * - * . Can remove duplicate items from a sorted list using - * `string_list_remove_duplicates`. - * - * . Can remove individual items of an unsorted list using - * `unsorted_string_list_delete_item`. - * - * . Can remove items not matching a criterion from a sorted or unsorted - * list using `filter_string_list`, or remove empty strings using - * `string_list_remove_empty_items`. - * - * . Finally it should free the list using `string_list_clear`. - * - * Example: - * - * struct string_list list = STRING_LIST_INIT_NODUP; - * int i; - * - * string_list_append(&list, "foo"); - * string_list_append(&list, "bar"); - * for (i = 0; i < list.nr; i++) - * printf("%s\n", list.items[i].string) - * - * NOTE: It is more efficient to build an unsorted list and sort it - * afterwards, instead of building a sorted list (`O(n log n)` instead of - * `O(n^2)`). - * - * However, if you use the list to check if a certain string was added - * already, you should not do that (using unsorted_string_list_has_string()), - * because the complexity would be quadratic again (but with a worse factor). - */ - -/** - * Represents an item of the list. The `string` member is a pointer to the - * string, and you may use the `util` member for any purpose, if you want. - */ -struct string_list_item { - char *string; - void *util; -}; - -typedef int (*compare_strings_fn)(const char *, const char *); - -/** - * Represents the list itself. - * - * . The array of items are available via the `items` member. - * . The `nr` member contains the number of items stored in the list. - * . The `alloc` member is used to avoid reallocating at every insertion. - * You should not tamper with it. - * . Setting the `strdup_strings` member to 1 will strdup() the strings - * before adding them, see above. - * . The `compare_strings_fn` member is used to specify a custom compare - * function, otherwise `strcmp()` is used as the default function. - */ -struct string_list { - struct string_list_item *items; - unsigned int nr, alloc; - unsigned int strdup_strings:1; - compare_strings_fn cmp; /* NULL uses strcmp() */ -}; - -#define STRING_LIST_INIT_NODUP { NULL, 0, 0, 0, NULL } -#define STRING_LIST_INIT_DUP { NULL, 0, 0, 1, NULL } - -/* General functions which work with both sorted and unsorted lists. */ - -/** - * Initialize the members of the string_list, set `strdup_strings` - * member according to the value of the second parameter. - */ -void string_list_init(struct string_list *list, int strdup_strings); - -/** Callback function type for for_each_string_list */ -typedef int (*string_list_each_func_t)(struct string_list_item *, void *); - -/** - * Apply `want` to each item in `list`, retaining only the ones for which - * the function returns true. If `free_util` is true, call free() on - * the util members of any items that have to be deleted. Preserve - * the order of the items that are retained. - */ -void filter_string_list(struct string_list *list, int free_util, - string_list_each_func_t want, void *cb_data); - -/** - * Free a string_list. The `string` pointer of the items will be freed - * in case the `strdup_strings` member of the string_list is set. The - * second parameter controls if the `util` pointer of the items should - * be freed or not. - */ -void string_list_clear(struct string_list *list, int free_util); - -/** - * Callback type for `string_list_clear_func`. The string associated - * with the util pointer is passed as the second argument - */ -typedef void (*string_list_clear_func_t)(void *p, const char *str); - -/** Call a custom clear function on each util pointer */ -void string_list_clear_func(struct string_list *list, string_list_clear_func_t clearfunc); - -/** - * Apply `func` to each item. If `func` returns nonzero, the - * iteration aborts and the return value is propagated. - */ -int for_each_string_list(struct string_list *list, - string_list_each_func_t func, void *cb_data); - -/** Iterate over each item, as a macro. */ -#define for_each_string_list_item(item,list) \ - for (item = (list)->items; \ - item && item < (list)->items + (list)->nr; \ - ++item) - -/** - * Remove any empty strings from the list. If free_util is true, call - * free() on the util members of any items that have to be deleted. - * Preserve the order of the items that are retained. - */ -void string_list_remove_empty_items(struct string_list *list, int free_util); - -/* Use these functions only on sorted lists: */ - -/** Determine if the string_list has a given string or not. */ -int string_list_has_string(const struct string_list *list, const char *string); -int string_list_find_insert_index(const struct string_list *list, const char *string, - int negative_existing_index); - -/** - * Insert a new element to the string_list. The returned pointer can - * be handy if you want to write something to the `util` pointer of - * the string_list_item containing the just added string. If the given - * string already exists the insertion will be skipped and the pointer - * to the existing item returned. - * - * Since this function uses xrealloc() (which die()s if it fails) if the - * list needs to grow, it is safe not to check the pointer. I.e. you may - * write `string_list_insert(...)->util = ...;`. - */ -struct string_list_item *string_list_insert(struct string_list *list, const char *string); - -/** - * Remove the given string from the sorted list. If the string - * doesn't exist, the list is not altered. - */ -void string_list_remove(struct string_list *list, const char *string, - int free_util); - -/** - * Check if the given string is part of a sorted list. If it is part of the list, - * return the coresponding string_list_item, NULL otherwise. - */ -struct string_list_item *string_list_lookup(struct string_list *list, const char *string); - -/* - * Remove all but the first of consecutive entries with the same - * string value. If free_util is true, call free() on the util - * members of any items that have to be deleted. - */ -void string_list_remove_duplicates(struct string_list *sorted_list, int free_util); - - -/* Use these functions only on unsorted lists: */ - -/** - * Add string to the end of list. If list->strdup_string is set, then - * string is copied; otherwise the new string_list_entry refers to the - * input string. - */ -struct string_list_item *string_list_append(struct string_list *list, const char *string); - -/** - * Like string_list_append(), except string is never copied. When - * list->strdup_strings is set, this function can be used to hand - * ownership of a malloc()ed string to list without making an extra - * copy. - */ -struct string_list_item *string_list_append_nodup(struct string_list *list, char *string); - -/** - * Sort the list's entries by string value in `strcmp()` order. - */ -void string_list_sort(struct string_list *list); - -/** - * Like `string_list_has_string()` but for unsorted lists. Linear in - * size of the list. - */ -int unsorted_string_list_has_string(struct string_list *list, const char *string); - -/** - * Like `string_list_lookup()` but for unsorted lists. Linear in size - * of the list. - */ -struct string_list_item *unsorted_string_list_lookup(struct string_list *list, - const char *string); -/** - * Remove an item from a string_list. The `string` pointer of the - * items will be freed in case the `strdup_strings` member of the - * string_list is set. The third parameter controls if the `util` - * pointer of the items should be freed or not. - */ -void unsorted_string_list_delete_item(struct string_list *list, int i, int free_util); - -/** - * Split string into substrings on character `delim` and append the - * substrings to `list`. The input string is not modified. - * list->strdup_strings must be set, as new memory needs to be - * allocated to hold the substrings. If maxsplit is non-negative, - * then split at most maxsplit times. Return the number of substrings - * appended to list. - * - * Examples: - * string_list_split(l, "foo:bar:baz", ':', -1) -> ["foo", "bar", "baz"] - * string_list_split(l, "foo:bar:baz", ':', 0) -> ["foo:bar:baz"] - * string_list_split(l, "foo:bar:baz", ':', 1) -> ["foo", "bar:baz"] - * string_list_split(l, "foo:bar:", ':', -1) -> ["foo", "bar", ""] - * string_list_split(l, "", ':', -1) -> [""] - * string_list_split(l, ":", ':', -1) -> ["", ""] - */ -int string_list_split(struct string_list *list, const char *string, - int delim, int maxsplit); - -/* - * Like string_list_split(), except that string is split in-place: the - * delimiter characters in string are overwritten with NULs, and the - * new string_list_items point into string (which therefore must not - * be modified or freed while the string_list is in use). - * list->strdup_strings must *not* be set. - */ -int string_list_split_in_place(struct string_list *list, char *string, - int delim, int maxsplit); -#endif /* STRING_LIST_H */ |