From c9a1b3392973ee30e6a9a532f1da8605619b5b06 Mon Sep 17 00:00:00 2001
From: Sam Atman
Date: Fri, 23 May 2025 18:46:30 -0400
Subject: Make offset size configurable

Hopefully I can talk users out of taking advantage of this configuration
but I'll have better luck with that if it's available.
---
 build.zig | 54 ++++++++++++++++++++++++++++++++----------------------
 1 file changed, 32 insertions(+), 22 deletions(-)

(limited to 'build.zig')

diff --git a/build.zig b/build.zig
index 8cfa039..648571b 100644
--- a/build.zig
+++ b/build.zig
@@ -11,7 +11,34 @@ pub fn build(b: *std.Build) void {
         .optimize = optimize,
     });
 
-    // Code generation
+    //| Options
+
+    // Display width
+    const cjk = b.option(bool, "cjk", "Ambiguous code points are wide (display width: 2).") orelse false;
+    const dwp_options = b.addOptions();
+    dwp_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)",
+    );
+    dwp_options.addOption(?i4, "c0_width", c0_width);
+    const c1_width = b.option(
+        i4,
+        "c1_width",
+        "C1 controls have this width (default: 0)",
+    );
+    dwp_options.addOption(?i4, "c1_width", c1_width);
+
+    //| Offset size
+    const fat_offset = b.option(bool, "fat_offset", "Offsets in Iterators and data structures will be u64") orelse false;
+    const size_config = b.addOptions();
+    size_config.addOption(bool, "fat_offset", fat_offset);
+
+    //| Code generation
+
     // Grapheme break
     const gbp_gen_exe = b.addExecutable(.{
         .name = "gbp",
@@ -31,32 +58,13 @@ pub fn build(b: *std.Build) void {
     const run_wbp_gen_exe = b.addRunArtifact(wbp_gen_exe);
     const wbp_gen_out = run_wbp_gen_exe.addOutputFileArg("wbp.bin.z");
 
-    // Display width
-    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"),
         .target = b.graph.host,
         .optimize = .Debug,
     });
-    dwp_gen_exe.root_module.addOptions("options", options);
+    dwp_gen_exe.root_module.addOptions("options", dwp_options);
     const run_dwp_gen_exe = b.addRunArtifact(dwp_gen_exe);
     const dwp_gen_out = run_dwp_gen_exe.addOutputFileArg("dwp.bin.z");
 
@@ -199,6 +207,7 @@ pub fn build(b: *std.Build) void {
         .target = target,
         .optimize = optimize,
     });
+    code_point.addOptions("config", size_config);
 
     const code_point_t = b.addTest(.{
         .name = "code_point",
@@ -216,6 +225,7 @@ pub fn build(b: *std.Build) void {
     });
     graphemes.addAnonymousImport("gbp", .{ .root_source_file = gbp_gen_out });
     graphemes.addImport("code_point", code_point);
+    graphemes.addOptions("config", size_config);
 
     const grapheme_t = b.addTest(.{
         .name = "Graphemes",
@@ -267,7 +277,7 @@ pub fn build(b: *std.Build) void {
     display_width.addImport("ascii", ascii);
     display_width.addImport("code_point", code_point);
     display_width.addImport("Graphemes", graphemes);
-    display_width.addOptions("options", options); // For testing
+    display_width.addOptions("options", dwp_options); // For testing
 
     const display_width_t = b.addTest(.{
         .name = "display_width",
-- 
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