text-util: constify text_range_* functions

1 files changed, 6 insertions, 6 deletions

diff --git a/text-util.h b/text-util.h
index 9bfa705..a4d31b1 100644
--- a/text-util.h
+++ b/text-util.h
@@ -6,21 +6,21 @@
 #include "text.h"
 
 /* test whether the given range is valid (start <= end) */
-bool text_range_valid(Filerange*);
+bool text_range_valid(const Filerange*);
 /* get the size of the range (end-start) or zero if invalid */
-size_t text_range_size(Filerange*);
+size_t text_range_size(const Filerange*);
 /* create an empty / invalid range of size zero */
 Filerange text_range_empty(void);
 /* merge two ranges into a new one which contains both of them */
-Filerange text_range_union(Filerange*, Filerange*);
+Filerange text_range_union(const Filerange*, const Filerange*);
 /* create new range [min(a,b), max(a,b)] */
 Filerange text_range_new(size_t a, size_t b);
 /* test whether two ranges are equal */
-bool text_range_equal(Filerange*, Filerange*);
+bool text_range_equal(const Filerange*, const Filerange*);
 /* test whether two ranges overlap */
-bool text_range_overlap(Filerange*, Filerange*);
+bool text_range_overlap(const Filerange*, const Filerange*);
 /* test whether a given position is within a certain range */
-bool text_range_contains(Filerange*, size_t pos);
+bool text_range_contains(const Filerange*, size_t pos);
 /* count the number of graphemes in data */
 int text_char_count(const char *data, size_t len);