neurocyte/flow
neurocyte/flow
1
1
Fork 0
Code Issues Pull requests Projects Releases 5 Packages Wiki Activity Actions

fix: switch_case does nothing if there are non-cased chars in range

Browse source
This commit is contained in:
CJ van den Berg 2026-02-15 21:51:38 +01:00
parent 80429f6055
commit 7471848ef2
Signed by: neurocyte
GPG key ID: 8EB1E1BB660E3FB9
2 changed files with 24 additions and 7 deletions
Download patch file Download diff file Expand all files Collapse all files

27
src/buffer/unicode.zig
View file

@ -150,12 +150,14 @@ fn utf8_transform(comptime field: uucode.FieldEnum, allocator: std.mem.Allocator
return result.toOwnedSlice();
}
fn utf8_predicate(comptime field: uucode.FieldEnum, text: []const u8) bool {
fn utf8_predicate_all(comptime field: uucode.FieldEnum, text: []const u8) bool {
const view: Utf8View = .initUnchecked(text);
var it = view.iterator();
while (it.nextCodepoint()) |cp| {
const result = switch (field) {
.is_lowercase => uucode.get(field, cp),
.changes_when_casefolded => uucode.get(field, cp),
.changes_when_lowercased => uucode.get(field, cp),
else => @compileError(@tagName(field) ++ " is not a unicode predicate"),
};
if (!result) return false;
@ -163,6 +165,21 @@ fn utf8_predicate(comptime field: uucode.FieldEnum, text: []const u8) bool {
return true;
}
fn utf8_predicate_any(comptime field: uucode.FieldEnum, text: []const u8) bool {
const view: Utf8View = .initUnchecked(text);
var it = view.iterator();
while (it.nextCodepoint()) |cp| {
const result = switch (field) {
.is_lowercase => uucode.get(field, cp),
.changes_when_casefolded => uucode.get(field, cp),
.changes_when_lowercased => uucode.get(field, cp),
else => @compileError(@tagName(field) ++ " is not a unicode predicate"),
};
if (result) return true;
}
return false;
}
pub fn to_upper(allocator: std.mem.Allocator, text: []const u8) TransformError![]u8 {
return utf8_transform(.simple_uppercase_mapping, allocator, text);
}
@ -184,14 +201,14 @@ pub fn case_folded_write_partial(writer: *std.Io.Writer, text: []const u8) Trans
}
pub fn switch_case(allocator: std.mem.Allocator, text: []const u8) TransformError![]u8 {
return if (utf8_predicate(.is_lowercase, text))
to_upper(allocator, text)
return if (utf8_predicate_any(.changes_when_lowercased, text))
to_lower(allocator, text)
else
to_lower(allocator, text);
to_upper(allocator, text);
}
pub fn is_lowercase(text: []const u8) bool {
return utf8_predicate(.is_lowercase, text);
return utf8_predicate_all(.is_lowercase, text);
}
const std = @import("std");