From f37875c6c4e42055735f1cda9fdbcb7ab11b80bc Mon Sep 17 00:00:00 2001
From: Sam Atman
Date: Fri, 13 Dec 2024 15:14:15 -0500
Subject: Add c0 and c1 control width options

This allows a build of DisplayWidth to give characters in those classes
a width, for cases where they'll be printed with a substitute in the
final display.  It also raises the size of possible characters from an
i3 to an i4, to accommodate printing C1s as e.g. <80> or \u{80}.
---
 build.zig | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

(limited to 'build.zig')

diff --git a/build.zig b/build.zig
index 4c4a35a..ce362ea 100644
--- a/build.zig
+++ b/build.zig
@@ -16,10 +16,24 @@ pub fn build(b: *std.Build) void {
     const gbp_gen_out = run_gbp_gen_exe.addOutputFileArg("gbp.bin.z");
 
     // Display width
-    const cjk = b.option(bool, "cjk", "Ambiguouse code points are wide (display width: 2).") orelse false;
+    const cjk = b.option(bool, "cjk", "Ambiguous code points are wide (display width: 2).") orelse false;
     const options = b.addOptions();
     options.addOption(bool, "cjk", cjk);
 
+    // Visible Controls
+    const c0_width = b.option(
+        i4,
+        "c0_width",
+        "C0 controls have this width (default: 0, <BS> <Del> default -1)",
+    );
+    options.addOption(?i4, "c0_width", c0_width);
+    const c1_width = b.option(
+        i4,
+        "c1_width",
+        "C1 controls have this width (default: 0)",
+    );
+    options.addOption(?i4, "c1_width", c1_width);
+
     const dwp_gen_exe = b.addExecutable(.{
         .name = "dwp",
         .root_source_file = b.path("codegen/dwp.zig"),
@@ -210,6 +224,7 @@ pub fn build(b: *std.Build) void {
     display_width.addImport("code_point", code_point);
     display_width.addImport("grapheme", grapheme);
     display_width.addImport("DisplayWidthData", width_data);
+    display_width.addOptions("options", options); // For testing
 
     // Normalization
     const ccc_data = b.createModule(.{
-- 
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