macos/foundation: more string funcs

pkg/macos/foundation.zig

@@ -1,4 +1,5 @@
 pub usingnamespace @import("foundation/array.zig");
+pub usingnamespace @import("foundation/base.zig");
 pub usingnamespace @import("foundation/dictionary.zig");
 pub usingnamespace @import("foundation/string.zig");
 pub usingnamespace @import("foundation/type.zig");

pkg/macos/foundation/base.zig

@@ -0,0 +1,5 @@
+pub const ComparisonResult = enum(c_int) {
+    less = -1,
+    equal = 0,
+    greater = 1,
+};

pkg/macos/foundation/string.zig

@@ -1,6 +1,6 @@
 const std = @import("std");
 const Allocator = std.mem.Allocator;
-const cftype = @import("type.zig");
+const foundation = @import("../foundation.zig");
 
 pub const String = opaque {
     pub fn createWithBytes(
@@ -18,13 +18,24 @@ pub const String = opaque {
     }
 
     pub fn release(self: *String) void {
-        cftype.CFRelease(self);
+        foundation.CFRelease(self);
     }
 
     pub fn hasPrefix(self: *String, prefix: *String) bool {
         return CFStringHasPrefix(self, prefix) == 1;
     }
 
+    pub fn compare(
+        self: *String,
+        other: *String,
+        options: StringComparison,
+    ) foundation.ComparisonResult {
+        return @intToEnum(
+            foundation.ComparisonResult,
+            CFStringCompare(self, other, @bitCast(c_int, options)),
+        );
+    }
+
     pub extern "c" fn CFStringCreateWithBytes(
         allocator: ?*anyopaque,
         bytes: [*]const u8,
@@ -33,6 +44,25 @@ pub const String = opaque {
         is_external: bool,
     ) ?*String;
     pub extern "c" fn CFStringHasPrefix(*String, *String) u8;
+    pub extern "c" fn CFStringCompare(*String, *String, c_int) c_int;
+};
+
+pub const StringComparison = packed struct {
+    case_insensitive: bool = false,
+    _unused_2: bool = false,
+    backwards: bool = false,
+    anchored: bool = false,
+    nonliteral: bool = false,
+    localized: bool = false,
+    numerically: bool = false,
+    diacritic_insensitive: bool = false,
+    width_insensitive: bool = false,
+    forced_ordering: bool = false,
+    _padding: u22 = 0,
+
+    test {
+        try std.testing.expectEqual(@bitSizeOf(c_int), @bitSizeOf(StringComparison));
+    }
 };
 
 /// https://developer.apple.com/documentation/corefoundation/cfstringencoding?language=objc
@@ -63,4 +93,5 @@ test "string" {
     defer prefix.release();
 
     try testing.expect(str.hasPrefix(prefix));
+    try testing.expectEqual(foundation.ComparisonResult.equal, str.compare(str, .{}));
 }