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ff919f965d
Add two new functions, string_list_split() and string_list_split_in_place(). These split a string into a string_list on a separator character. The first makes copies of the substrings (leaving the input string untouched) and the second splits the original string in place, overwriting the separator characters with NULs and referring to the original string's memory. These functions are similar to the strbuf_split_*() functions except that they work with the more powerful string_list interface. Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com>
96 lines
3.9 KiB
C
96 lines
3.9 KiB
C
#ifndef STRING_LIST_H
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#define STRING_LIST_H
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struct string_list_item {
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char *string;
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void *util;
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};
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struct string_list {
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struct string_list_item *items;
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unsigned int nr, alloc;
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unsigned int strdup_strings:1;
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};
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#define STRING_LIST_INIT_NODUP { NULL, 0, 0, 0 }
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#define STRING_LIST_INIT_DUP { NULL, 0, 0, 1 }
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void print_string_list(const struct string_list *p, const char *text);
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void string_list_clear(struct string_list *list, int free_util);
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/* Use this function to call a custom clear function on each util pointer */
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/* The string associated with the util pointer is passed as the second argument */
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typedef void (*string_list_clear_func_t)(void *p, const char *str);
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void string_list_clear_func(struct string_list *list, string_list_clear_func_t clearfunc);
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/* Use this function or the macro below to iterate over each item */
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typedef int (*string_list_each_func_t)(struct string_list_item *, void *);
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int for_each_string_list(struct string_list *list,
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string_list_each_func_t, void *cb_data);
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#define for_each_string_list_item(item,list) \
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for (item = (list)->items; item < (list)->items + (list)->nr; ++item)
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/* Use these functions only on sorted lists: */
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int string_list_has_string(const struct string_list *list, const char *string);
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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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struct string_list_item *string_list_insert(struct string_list *list, const char *string);
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struct string_list_item *string_list_insert_at_index(struct string_list *list,
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int insert_at, const char *string);
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struct string_list_item *string_list_lookup(struct string_list *list, const char *string);
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/* Use these functions only on unsorted lists: */
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/*
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* Add string to the end of list. If list->strdup_string is set, then
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* string is copied; otherwise the new string_list_entry refers to the
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* input string.
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*/
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struct string_list_item *string_list_append(struct string_list *list, const char *string);
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/*
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* Like string_list_append(), except string is never copied. When
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* list->strdup_strings is set, this function can be used to hand
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* ownership of a malloc()ed string to list without making an extra
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* copy.
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*/
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struct string_list_item *string_list_append_nodup(struct string_list *list, char *string);
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void sort_string_list(struct string_list *list);
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int unsorted_string_list_has_string(struct string_list *list, const char *string);
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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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void unsorted_string_list_delete_item(struct string_list *list, int i, int free_util);
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/*
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* Split string into substrings on character delim and append the
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* substrings to list. The input string is not modified.
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* list->strdup_strings must be set, as new memory needs to be
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* allocated to hold the substrings. If maxsplit is non-negative,
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* then split at most maxsplit times. Return the number of substrings
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* appended to list.
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*
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* Examples:
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* string_list_split(l, "foo:bar:baz", ':', -1) -> ["foo", "bar", "baz"]
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* string_list_split(l, "foo:bar:baz", ':', 0) -> ["foo:bar:baz"]
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* string_list_split(l, "foo:bar:baz", ':', 1) -> ["foo", "bar:baz"]
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* string_list_split(l, "foo:bar:", ':', -1) -> ["foo", "bar", ""]
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* string_list_split(l, "", ':', -1) -> [""]
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* string_list_split(l, ":", ':', -1) -> ["", ""]
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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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* Like string_list_split(), except that string is split in-place: the
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* delimiter characters in string are overwritten with NULs, and the
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* new string_list_items point into string (which therefore must not
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* be modified or freed while the string_list is in use).
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* list->strdup_strings must *not* be set.
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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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#endif /* STRING_LIST_H */
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