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const std = @import("std");
// vt.cpp
extern "c" fn ghostty_simd_codepoint_width(u32) i8;
pub fn codepointWidth(cp: u32) i8 {
//return @import("uucode").get(.wcwidth, @intCast(cp));
return ghostty_simd_codepoint_width(cp);
}
test "codepointWidth basic" {
const testing = std.testing;
try testing.expectEqual(@as(i8, 1), codepointWidth('a'));
try testing.expectEqual(@as(i8, 1), codepointWidth(0x100)); // Ā
try testing.expectEqual(@as(i8, 2), codepointWidth(0x3400)); // 㐀
try testing.expectEqual(@as(i8, 2), codepointWidth(0x2E3A)); // ⸺
try testing.expectEqual(@as(i8, 2), codepointWidth(0x1F1E6)); // 🇦
try testing.expectEqual(@as(i8, 2), codepointWidth(0x4E00)); // 一
try testing.expectEqual(@as(i8, 2), codepointWidth(0xF900)); // 豈
try testing.expectEqual(@as(i8, 2), codepointWidth(0x20000)); // 𠀀
try testing.expectEqual(@as(i8, 2), codepointWidth(0x30000)); // 𠀀
// try testing.expectEqual(@as(i8, 1), @import("uucode").get(.wcwidth, 0x100));
}
// This is not very fast in debug modes, so its commented by default.
// IMPORTANT: UNCOMMENT THIS WHENEVER MAKING CODEPOINTWIDTH CHANGES.
// test "codepointWidth matches uucode" {
// const testing = std.testing;
// const uucode = @import("uucode");
//
// const min = 0xFF + 1; // start outside ascii
// for (min..uucode.code_point_range_end) |cp| {
// const simd = codepointWidth(@intCast(cp));
// const uu = @min(2, @max(0, uucode.get(.wcwidth, @intCast(cp))));
// if (simd != uu) mismatch: {
// if (cp == 0x2E3B) {
// try testing.expectEqual(@as(i8, 2), simd);
// break :mismatch;
// }
//
// std.log.warn("mismatch cp=U+{x} simd={} uucode={}", .{ cp, simd, uu });
// try testing.expect(false);
// }
// }
// }
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