Commit 8e9f827117ab1418578b692a2325754cc3ee692d | lib/zig/leven

author	Meghan Denny <hello@nektro.net> 2021-07-27 23:48:27 -07:00
committer	Meghan Denny <hello@nektro.net> 2021-07-27 23:48:27 -07:00
log	8e9f827117ab1418578b692a2325754cc3ee692d
tree	5782999915ec938d8f186acec819431a378d7720
parent	2c64271ce793bcb904ad2f93eeefb4840cbac012

2 files changed, 7 insertions(+), 2 deletions(-)

README.md+1-1

...	...	@@ -16,7 +16,7 @@ zigmod aq add 1/nektro/leven
16	16	```
17	17
18	18	## Usage
19		`pub fn leven(comptime T: type, alloc: *std.mem.Allocator, a: []const T, b: []const T) !usize`
	19	`pub fn leven(comptime T: type, alloc: *std.mem.Allocator, a: []const T, b: []const T, max: ?usize) !usize`
20	20
21	21	## Future
22	22	TODO Unicode support for strings

src/lib.zig+6-1

...	...	@@ -15,7 +15,7 @@ const range = @import("range").range;
15	15	// );
16	16	// }
17	17
18		pub fn leven(comptime T: type, alloc: *std.mem.Allocator, a: []const T, b: []const T) !usize {
	18	pub fn leven(comptime T: type, alloc: *std.mem.Allocator, a: []const T, b: []const T, max: ?usize) !usize {
19	19	if (std.mem.eql(T, a, b)) return 0;
20	20
21	21	var left = a;
...	...	@@ -29,6 +29,10 @@ pub fn leven(comptime T: type, alloc: *std.mem.Allocator, a: []const T, b: []con
29	29	var ll = left.len;
30	30	var rl = right.len;
31	31
	32	if (max != null and rl - ll >= max.?) {
	33	return max.?;
	34	}
	35
32	36	{
33	37	const sl = suffixLen(T, a, b);
34	38	ll -= sl;
...	...	@@ -67,6 +71,7 @@ pub fn leven(comptime T: type, alloc: *std.mem.Allocator, a: []const T, b: []con
67	71	}
68	72	}
69	73
	74	if (max != null and result >= max.?) return max.?;
70	75	return result;
71	76	}
72	77