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const std = @import("std");
const assert = std.debug.assert;
const Allocator = std.mem.Allocator;
const foundation = @import("../foundation.zig");
const c = @import("c.zig").c;
pub const String = opaque {
pub fn createWithBytes(
bs: []const u8,
encoding: StringEncoding,
external: bool,
) Allocator.Error!*String {
return @as(?*String, @ptrFromInt(@intFromPtr(c.CFStringCreateWithBytes(
null,
bs.ptr,
@intCast(bs.len),
@intFromEnum(encoding),
@intFromBool(external),
)))) orelse Allocator.Error.OutOfMemory;
}
pub fn createWithCharactersNoCopy(
unichars: []const u16,
) *String {
return @as(*String, @ptrFromInt(@intFromPtr(c.CFStringCreateWithCharactersNoCopy(
null,
@ptrCast(unichars.ptr),
@intCast(unichars.len),
foundation.c.kCFAllocatorNull,
))));
}
pub fn release(self: *String) void {
c.CFRelease(self);
}
pub fn getLength(self: *String) usize {
return @intCast(c.CFStringGetLength(@ptrCast(self)));
}
pub fn hasPrefix(self: *String, prefix: *String) bool {
return c.CFStringHasPrefix(
@ptrCast(self),
@ptrCast(prefix),
) == 1;
}
pub fn compare(
self: *String,
other: *String,
options: StringComparison,
) foundation.ComparisonResult {
return @enumFromInt(c.CFStringCompare(
@ptrCast(self),
@ptrCast(other),
@intCast(@as(c_int, @bitCast(options))),
));
}
pub fn cstring(self: *String, buf: []u8, encoding: StringEncoding) ?[]const u8 {
if (c.CFStringGetCString(
@ptrCast(self),
buf.ptr,
@intCast(buf.len),
@intFromEnum(encoding),
) == 0) return null;
return std.mem.sliceTo(buf, 0);
}
pub fn cstringPtr(self: *String, encoding: StringEncoding) ?[:0]const u8 {
const ptr = c.CFStringGetCStringPtr(
@ptrCast(self),
@intFromEnum(encoding),
);
if (ptr == null) return null;
return std.mem.sliceTo(ptr, 0);
}
};
pub const MutableString = opaque {
pub fn create(cap: usize) !*MutableString {
return @ptrCast(c.CFStringCreateMutable(
null,
@intCast(cap),
) orelse return Allocator.Error.OutOfMemory);
}
pub fn release(self: *MutableString) void {
foundation.CFRelease(self);
}
pub fn string(self: *MutableString) *String {
return @ptrCast(self);
}
pub fn appendCharacters(self: *MutableString, chars: []const u16) void {
c.CFStringAppendCharacters(
@ptrCast(self),
chars.ptr,
@intCast(chars.len),
);
}
};
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
pub const StringEncoding = enum(u32) {
invalid = 0xffffffff,
mac_roman = 0,
windows_latin1 = 0x0500,
iso_latin1 = 0x0201,
nextstep_latin = 0x0B01,
ascii = 0x0600,
unicode = 0x0100,
utf8 = 0x08000100,
non_lossy_ascii = 0x0BFF,
utf16_be = 0x10000100,
utf16_le = 0x14000100,
utf32 = 0x0c000100,
utf32_be = 0x18000100,
utf32_le = 0x1c000100,
};
pub fn stringGetSurrogatePairForLongCharacter(
ch: u32,
surrogates: []u16,
) bool {
assert(surrogates.len >= 2);
return c.CFStringGetSurrogatePairForLongCharacter(ch, surrogates.ptr) == 1;
}
test "string" {
const testing = std.testing;
const str = try String.createWithBytes("hello world", .ascii, false);
defer str.release();
const prefix = try String.createWithBytes("hello", .ascii, false);
defer prefix.release();
try testing.expect(str.hasPrefix(prefix));
try testing.expectEqual(foundation.ComparisonResult.equal, str.compare(str, .{}));
try testing.expectEqualStrings("hello world", str.cstringPtr(.ascii).?);
{
var buf: [128]u8 = undefined;
const cstr = str.cstring(&buf, .ascii).?;
try testing.expectEqualStrings("hello world", cstr);
}
}
test "unichar" {
const testing = std.testing;
var unichars: [2]u16 = undefined;
try testing.expect(!stringGetSurrogatePairForLongCharacter('A', &unichars));
}
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