From 589269c0b3ca74a29f5889fa6e781e59cef7efdb Mon Sep 17 00:00:00 2001
From: Gabriel Schneider <gbrls@0x4200.cafe>
Date: Thu, 2 Jul 2026 21:56:01 -0300
Subject: wasm replay ui

---
 dump.zig | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

(limited to 'dump.zig')

diff --git a/dump.zig b/dump.zig
index 5a55f04f..9c1dceec 100644
--- a/dump.zig
+++ b/dump.zig
@@ -1,4 +1,5 @@
 const std = @import("std");
+const builtin = @import("builtin");
 
 pub const default_path = "/tmp/pardes-dump.zon";
 pub const magic = "pardes-dump";
@@ -104,13 +105,30 @@ pub fn writeFile(io: std.Io, gpa: std.mem.Allocator, path: []const u8, state: St
 pub fn readFile(io: std.Io, gpa: std.mem.Allocator, path: []const u8) !State {
     const bytes = try std.Io.Dir.cwd().readFileAlloc(io, path, gpa, .limited(64 * 1024 * 1024));
     defer gpa.free(bytes);
+    return readZon(gpa, bytes, path);
+}
+
+pub fn readZon(gpa: std.mem.Allocator, bytes: []const u8, label: []const u8) !State {
     const source = try gpa.dupeZ(u8, bytes);
     defer gpa.free(source);
+    return readZonZ(gpa, source, label);
+}
+
+pub fn readZonZ(gpa: std.mem.Allocator, source: [:0]const u8, label: []const u8) !State {
+    if (builtin.os.tag == .emscripten) {
+        const state = std.zon.parse.fromSliceAlloc(State, gpa, source, null, .{}) catch |err| {
+            std.log.err("parse dump {s}: {s}", .{ label, @errorName(err) });
+            return err;
+        };
+        errdefer std.zon.parse.free(gpa, state);
+        try validate(state);
+        return state;
+    }
 
     var diag: std.zon.parse.Diagnostics = .{};
     defer diag.deinit(gpa);
     const state = std.zon.parse.fromSliceAlloc(State, gpa, source, &diag, .{}) catch |err| {
-        std.log.err("parse dump {s}: {f}", .{ path, diag });
+        std.log.err("parse dump {s}: {f}", .{ label, diag });
         return err;
     };
     errdefer std.zon.parse.free(gpa, state);
-- 
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