text-util: introduce text_range_equal

yws · Jul 28, 2015 · f38ab16 · f38ab16
1 parent 6d7aa20
commit f38ab16
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Showing 2 changed files with 8 additions and 0 deletions.
diff --git a/text-util.c b/text-util.c
@@ -31,6 +31,12 @@ Filerange text_range_new(size_t a, size_t b) {
 	};
 }
 
+bool text_range_equal(Filerange *r1, Filerange *r2) {
+	if (!text_range_valid(r1) && !text_range_valid(r2))
+		return true;
+	return r1->start == r2->start && r1->end == r2->end;
+}
+
 bool text_range_overlap(Filerange *r1, Filerange *r2) {
 	if (!text_range_valid(r1) || !text_range_valid(r2))
 		return false;

diff --git a/text-util.h b/text-util.h
@@ -15,6 +15,8 @@ Filerange text_range_empty(void);
 Filerange text_range_union(Filerange*, 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*);
 /* test whether two ranges overlap */
 bool text_range_overlap(Filerange*, Filerange*);
 /* test whether a given position is within a certain range */