53 lines
2.1 KiB
Zig
53 lines
2.1 KiB
Zig
const std = @import("std");
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const options = @import("build_options");
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// vt.cpp
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extern "c" fn ghostty_simd_codepoint_width(u32) i8;
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pub fn codepointWidth(cp: u32) i8 {
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if (comptime options.simd) return ghostty_simd_codepoint_width(cp);
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const uucode = @import("uucode");
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if (cp > uucode.config.max_code_point) return 1;
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return @import("uucode").get(.width, @intCast(cp));
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}
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test "codepointWidth basic" {
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const testing = std.testing;
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try testing.expectEqual(@as(i8, 1), codepointWidth('a'));
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try testing.expectEqual(@as(i8, 1), codepointWidth(0x100)); // Ā
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try testing.expectEqual(@as(i8, 2), codepointWidth(0x3400)); // 㐀
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try testing.expectEqual(@as(i8, 2), codepointWidth(0x2E3A)); // ⸺
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try testing.expectEqual(@as(i8, 2), codepointWidth(0x1F1E6)); // 🇦
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try testing.expectEqual(@as(i8, 2), codepointWidth(0x4E00)); // 一
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try testing.expectEqual(@as(i8, 2), codepointWidth(0xF900)); // 豈
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try testing.expectEqual(@as(i8, 2), codepointWidth(0x20000)); // 𠀀
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try testing.expectEqual(@as(i8, 2), codepointWidth(0x30000)); // 𠀀
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// try testing.expectEqual(@as(i8, 1), @import("uucode").get(.width, 0x100));
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}
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// This is not very fast in debug modes, so its commented by default.
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// IMPORTANT: UNCOMMENT THIS WHENEVER MAKING CODEPOINTWIDTH CHANGES.
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// test "codepointWidth matches uucode" {
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// const testing = std.testing;
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// const uucode = @import("uucode");
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//
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// const min = 0xFF + 1; // start outside ascii
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// const max = std.math.maxInt(u21) + 1;
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// for (min..max) |cp| {
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// const simd = codepointWidth(@intCast(cp));
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// const uu = if (cp > uucode.config.max_code_point)
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// 1
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// else
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// uucode.get(.width, @intCast(cp));
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// if (simd != uu) mismatch: {
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// if (cp == 0x2E3B) {
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// try testing.expectEqual(@as(i8, 2), simd);
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// break :mismatch;
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// }
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//
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// std.log.warn("mismatch cp=U+{x} simd={} uucode={}", .{ cp, simd, uu });
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// try testing.expect(false);
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// }
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// }
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// }
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