diff options
| -rw-r--r-- | text-util.c | 6 | ||||
| -rw-r--r-- | text-util.h | 2 |
2 files changed, 8 insertions, 0 deletions
diff --git a/text-util.c b/text-util.c index f198d81..4936d92 100644 --- a/text-util.c +++ b/text-util.c @@ -27,6 +27,12 @@ Filerange text_range_union(const Filerange *r1, const Filerange *r2) { }; } +Filerange text_range_intersect(const Filerange *r1, const Filerange *r2) { + if (!text_range_overlap(r1, r2)) + return text_range_empty(); + return text_range_new(MAX(r1->start, r2->start), MIN(r1->end, r2->end)); +} + Filerange text_range_new(size_t a, size_t b) { return (Filerange) { .start = MIN(a, b), diff --git a/text-util.h b/text-util.h index 86d3307..709e255 100644 --- a/text-util.h +++ b/text-util.h @@ -13,6 +13,8 @@ size_t text_range_size(const Filerange*); Filerange text_range_empty(void); /* merge two ranges into a new one which contains both of them */ Filerange text_range_union(const Filerange*, const Filerange*); +/* get intersection of two ranges */ +Filerange text_range_intersect(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 */ |