string-list.h

   1 #ifndef STRING_LIST_H
   2 #define STRING_LIST_H
   3
   4 struct string_list_item {
   5         char *string;
   6         void *util;
   7 };
   8 struct string_list {
   9         struct string_list_item *items;
  10         unsigned int nr, alloc;
  11         unsigned int strdup_strings:1;
  12 };
  13
  14 #define STRING_LIST_INIT_NODUP { NULL, 0, 0, 0 }
  15 #define STRING_LIST_INIT_DUP   { NULL, 0, 0, 1 }
  16
  17 void print_string_list(const struct string_list *p, const char *text);
  18 void string_list_clear(struct string_list *list, int free_util);
  19
  20 /* Use this function to call a custom clear function on each util pointer */
  21 /* The string associated with the util pointer is passed as the second argument */
  22 typedef void (*string_list_clear_func_t)(void *p, const char *str);
  23 void string_list_clear_func(struct string_list *list, string_list_clear_func_t clearfunc);
  24
  25 /* Use this function or the macro below to iterate over each item */
  26 typedef int (*string_list_each_func_t)(struct string_list_item *, void *);
  27 int for_each_string_list(struct string_list *list,
  28                          string_list_each_func_t, void *cb_data);
  29 #define for_each_string_list_item(item,list) \
  30         for (item = (list)->items; item < (list)->items + (list)->nr; ++item)
  31
  32
  33 /* Use these functions only on sorted lists: */
  34 int string_list_has_string(const struct string_list *list, const char *string);
  35 int string_list_find_insert_index(const struct string_list *list, const char *string,
  36                                   int negative_existing_index);
  37 struct string_list_item *string_list_insert(struct string_list *list, const char *string);
  38 struct string_list_item *string_list_insert_at_index(struct string_list *list,
  39                                                      int insert_at, const char *string);
  40 struct string_list_item *string_list_lookup(struct string_list *list, const char *string);
  41
  42
  43 /* Use these functions only on unsorted lists: */
  44
  45 /*
  46  * Add string to the end of list.  If list->strdup_string is set, then
  47  * string is copied; otherwise the new string_list_entry refers to the
  48  * input string.
  49  */
  50 struct string_list_item *string_list_append(struct string_list *list, const char *string);
  51
  52 /*
  53  * Like string_list_append(), except string is never copied.  When
  54  * list->strdup_strings is set, this function can be used to hand
  55  * ownership of a malloc()ed string to list without making an extra
  56  * copy.
  57  */
  58 struct string_list_item *string_list_append_nodup(struct string_list *list, char *string);
  59
  60 void sort_string_list(struct string_list *list);
  61 int unsorted_string_list_has_string(struct string_list *list, const char *string);
  62 struct string_list_item *unsorted_string_list_lookup(struct string_list *list,
  63                                                      const char *string);
  64
  65 void unsorted_string_list_delete_item(struct string_list *list, int i, int free_util);
  66
  67 /*
  68  * Split string into substrings on character delim and append the
  69  * substrings to list.  The input string is not modified.
  70  * list->strdup_strings must be set, as new memory needs to be
  71  * allocated to hold the substrings.  If maxsplit is non-negative,
  72  * then split at most maxsplit times.  Return the number of substrings
  73  * appended to list.
  74  *
  75  * Examples:
  76  *   string_list_split(l, "foo:bar:baz", ':', -1) -> ["foo", "bar", "baz"]
  77  *   string_list_split(l, "foo:bar:baz", ':', 0) -> ["foo:bar:baz"]
  78  *   string_list_split(l, "foo:bar:baz", ':', 1) -> ["foo", "bar:baz"]
  79  *   string_list_split(l, "foo:bar:", ':', -1) -> ["foo", "bar", ""]
  80  *   string_list_split(l, "", ':', -1) -> [""]
  81  *   string_list_split(l, ":", ':', -1) -> ["", ""]
  82  */
  83 int string_list_split(struct string_list *list, const char *string,
  84                       int delim, int maxsplit);
  85
  86 /*
  87  * Like string_list_split(), except that string is split in-place: the
  88  * delimiter characters in string are overwritten with NULs, and the
  89  * new string_list_items point into string (which therefore must not
  90  * be modified or freed while the string_list is in use).
  91  * list->strdup_strings must *not* be set.
  92  */
  93 int string_list_split_in_place(struct string_list *list, char *string,
  94                                int delim, int maxsplit);
  95 #endif /* STRING_LIST_H */