31 lines
1,011 B
Zig
31 lines
1,011 B
Zig
const FontFace = @This();
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const std = @import("std");
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// it seems that Windows only supports font faces with up to 31 characters
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pub const max = 31;
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buf: [max + 1]u16,
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len: u5,
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pub fn initUtf8(utf8: []const u8) error{ TooLong, InvalidUtf8 }!FontFace {
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const utf16_len = std.unicode.calcUtf16LeLen(utf8) catch return error.InvalidUtf8;
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if (utf16_len > max)
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return error.TooLong;
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var result: FontFace = .{ .buf = undefined, .len = @intCast(utf16_len) };
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result.buf[utf16_len] = 0;
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const actual_len = try std.unicode.utf8ToUtf16Le(&result.buf, utf8);
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std.debug.assert(actual_len == utf16_len);
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return result;
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}
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pub fn ptr(self: *const FontFace) [*:0]const u16 {
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std.debug.assert(self.buf[@as(usize, self.len)] == 0);
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return @ptrCast(&self.buf);
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}
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pub fn slice(self: *const FontFace) [:0]const u16 {
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return self.ptr()[0..self.len :0];
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}
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pub fn eql(self: *const FontFace, other: *const FontFace) bool {
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return std.mem.eql(u16, self.slice(), other.slice());
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}
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