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have collapseRepeats return slice intead of just len

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This commit is contained in:
Jonathan Marler 2021-01-06 23:55:33 -07:00
parent 666584067a
commit a72ad61cd4
2 changed files with 8 additions and 4 deletions
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10
lib/std/mem.zig
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@ -2130,7 +2130,7 @@ pub fn replaceScalar(comptime T: type, slice: []T, needle: T, replacement: T) vo
} }
/// Collapse consecutive duplicate elements into one entry. /// Collapse consecutive duplicate elements into one entry.
pub fn collapseRepeats(comptime T: type, slice: []T, elem: T) usize { pub fn collapseRepeatsLen(comptime T: type, slice: []T, elem: T) usize {
if (slice.len == 0) return 0; if (slice.len == 0) return 0;
var write_idx: usize = 1; var write_idx: usize = 1;
var read_idx: usize = 1; var read_idx: usize = 1;
@ -2143,11 +2143,15 @@ pub fn collapseRepeats(comptime T: type, slice: []T, elem: T) usize {
return write_idx; return write_idx;
} }
/// Collapse consecutive duplicate elements into one entry.
pub fn collapseRepeats(comptime T: type, slice: []T, elem: T) []T {
return slice[0 .. collapseRepeatsLen(T, slice, elem)];
}
fn testCollapseRepeats(str: []const u8, elem: u8, expected: []const u8) !void { fn testCollapseRepeats(str: []const u8, elem: u8, expected: []const u8) !void {
const mutable = try std.testing.allocator.dupe(u8, str); const mutable = try std.testing.allocator.dupe(u8, str);
defer std.testing.allocator.free(mutable); defer std.testing.allocator.free(mutable);
const actual = mutable[0..collapseRepeats(u8, mutable, elem)]; testing.expect(std.mem.eql(u8, collapseRepeats(u8, mutable, elem), expected));
testing.expect(std.mem.eql(u8, actual, expected));
} }
test "collapseRepeats" { test "collapseRepeats" {
try testCollapseRepeats("", '/', ""); try testCollapseRepeats("", '/', "");

2
lib/std/os/windows.zig
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@ -1786,7 +1786,7 @@ pub fn removeDotDirsSanitized(comptime T: type, path: []T) RemoveDotDirsError!us
/// Returns the length of the new path. /// Returns the length of the new path.
pub fn normalizePath(comptime T: type, path: []T) RemoveDotDirsError!usize { pub fn normalizePath(comptime T: type, path: []T) RemoveDotDirsError!usize {
mem.replaceScalar(T, path, '/', '\\'); mem.replaceScalar(T, path, '/', '\\');
const new_len = mem.collapseRepeats(T, path, '\\'); const new_len = mem.collapseRepeatsLen(T, path, '\\');
const prefix_len: usize = init: { const prefix_len: usize = init: {
if (new_len >= 1 and path[0] == '\\') break :init 1; if (new_len >= 1 and path[0] == '\\') break :init 1;