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const std = @import("std");
const Allocator = std.mem.Allocator;
const base = @import("base.zig");
const c = @import("c.zig").c;
const cftype = @import("type.zig");
const ComparisonResult = base.ComparisonResult;
const Range = base.Range;
pub const Array = opaque {
pub fn create(comptime T: type, values: []*const T) Allocator.Error!*Array {
return CFArrayCreate(
null,
@ptrCast(values.ptr),
@intCast(values.len),
null,
) orelse error.OutOfMemory;
}
pub fn release(self: *Array) void {
cftype.CFRelease(self);
}
pub fn getCount(self: *Array) usize {
return CFArrayGetCount(self);
}
/// Note the return type is actually a `*const T` but we strip the
/// constness so that further API calls work correctly. The Foundation
/// API doesn't properly mark things const/non-const.
pub fn getValueAtIndex(self: *Array, comptime T: type, idx: usize) *T {
return @ptrCast(@alignCast(CFArrayGetValueAtIndex(self, idx)));
}
pub extern "c" fn CFArrayCreate(
allocator: ?*anyopaque,
values: [*]*const anyopaque,
num_values: usize,
callbacks: ?*const anyopaque,
) ?*Array;
pub extern "c" fn CFArrayGetCount(*Array) usize;
pub extern "c" fn CFArrayGetValueAtIndex(*Array, usize) *anyopaque;
extern "c" var kCFTypeArrayCallBacks: anyopaque;
};
pub const MutableArray = opaque {
pub fn create() Allocator.Error!*MutableArray {
return CFArrayCreateMutable(
null,
0,
&c.kCFTypeArrayCallBacks,
) orelse error.OutOfMemory;
}
pub fn createCopy(array: *Array) Allocator.Error!*MutableArray {
return CFArrayCreateMutableCopy(
null,
0,
array,
) orelse error.OutOfMemory;
}
pub fn release(self: *MutableArray) void {
cftype.CFRelease(self);
}
pub fn appendValue(
self: *MutableArray,
comptime Elem: type,
value: *const Elem,
) void {
CFArrayAppendValue(self, @ptrCast(@constCast(value)));
}
pub fn removeValue(self: *MutableArray, idx: usize) void {
CFArrayRemoveValueAtIndex(self, idx);
}
pub fn sortValues(
self: *MutableArray,
comptime Elem: type,
comptime Context: type,
context: ?*Context,
comptime comparator: ?*const fn (
a: *const Elem,
b: *const Elem,
context: ?*Context,
) callconv(.c) ComparisonResult,
) void {
CFArraySortValues(
self,
Range.init(0, Array.CFArrayGetCount(@ptrCast(self))),
comparator,
context,
);
}
extern "c" fn CFArrayCreateMutable(
allocator: ?*anyopaque,
capacity: usize,
callbacks: ?*const anyopaque,
) ?*MutableArray;
extern "c" fn CFArrayCreateMutableCopy(
allocator: ?*anyopaque,
capacity: usize,
array: *Array,
) ?*MutableArray;
extern "c" fn CFArrayAppendValue(
*MutableArray,
*anyopaque,
) void;
extern "c" fn CFArrayRemoveValueAtIndex(
*MutableArray,
usize,
) void;
extern "c" fn CFArraySortValues(
array: *MutableArray,
range: Range,
comparator: ?*const anyopaque,
context: ?*anyopaque,
) void;
};
test "array" {
const testing = std.testing;
const str = "hello";
var values = [_]*const u8{ &str[0], &str[1] };
const arr = try Array.create(u8, &values);
defer arr.release();
try testing.expectEqual(@as(usize, 2), arr.getCount());
{
const ch = arr.getValueAtIndex(u8, 0);
try testing.expectEqual(@as(u8, 'h'), ch.*);
}
// Can make it mutable
var mut = try MutableArray.createCopy(arr);
defer mut.release();
}
test "array sorting" {
const testing = std.testing;
const str = "hello";
var values = [_]*const u8{ &str[0], &str[1] };
const arr = try Array.create(u8, &values);
defer arr.release();
const mut = try MutableArray.createCopy(arr);
defer mut.release();
mut.sortValues(
u8,
void,
null,
struct {
fn compare(a: *const u8, b: *const u8, _: ?*void) callconv(.c) ComparisonResult {
if (a.* > b.*) return .greater;
if (a.* == b.*) return .equal;
return .less;
}
}.compare,
);
{
const mutarr: *Array = @ptrCast(mut);
const ch = mutarr.getValueAtIndex(u8, 0);
try testing.expectEqual(@as(u8, 'e'), ch.*);
}
{
const mutarr: *Array = @ptrCast(mut);
const ch = mutarr.getValueAtIndex(u8, 1);
try testing.expectEqual(@as(u8, 'h'), ch.*);
}
}
|
