text-util.h

   1 #ifndef TEXT_UTIL_H
   2 #define TEXT_UTIL_H
   3
   4 #include <stdbool.h>
   5 #include <stddef.h>
   6 #include "text.h"
   7
   8 /* test whether the given range is valid (start <= end) */
   9 bool text_range_valid(const Filerange*);
  10 /* get the size of the range (end-start) or zero if invalid */
  11 size_t text_range_size(const Filerange*);
  12 /* create an empty / invalid range of size zero */
  13 Filerange text_range_empty(void);
  14 /* merge two ranges into a new one which contains both of them */
  15 Filerange text_range_union(const Filerange*, const Filerange*);
  16 /* create new range [min(a,b), max(a,b)] */
  17 Filerange text_range_new(size_t a, size_t b);
  18 /* test whether two ranges are equal */
  19 bool text_range_equal(const Filerange*, const Filerange*);
  20 /* test whether two ranges overlap */
  21 bool text_range_overlap(const Filerange*, const Filerange*);
  22 /* test whether a given position is within a certain range */
  23 bool text_range_contains(const Filerange*, size_t pos);
  24 /* count the number of graphemes in data */
  25 int text_char_count(const char *data, size_t len);
  26 /* get the approximate display width of data */
  27 int text_string_width(const char *data, size_t len);
  28
  29 #endif