Add Khronos license information to generated bindings

generator/vulkan/parse.zig

@@ -24,6 +24,7 @@ pub fn parseXml(backing_allocator: *Allocator, root: *xml.Element) !ParseResult
     const allocator = &arena.allocator;
 
     var reg = registry.Registry{
+        .copyright = root.getCharData("comment") orelse return error.InvalidRegistry,
         .decls = try parseDeclarations(allocator, root),
         .api_constants = try parseApiConstants(allocator, root),
         .tags = try parseTags(allocator, root),

generator/vulkan/registry.zig

@@ -1,4 +1,5 @@
 pub const Registry = struct {
+    copyright: []const u8,
     decls: []Declaration,
     api_constants: []ApiConstant,
     tags: []Tag,

generator/vulkan/render.zig

@@ -6,6 +6,9 @@ const mem = std.mem;
 const Allocator = mem.Allocator;
 
 const preamble =
+    \\
+    \\// This file is generated from the Khronos Vulkan XML API Registry
+    \\
     \\const std = @import("std");
     \\const builtin = @import("builtin");
     \\const root = @import("root");
@@ -294,6 +297,7 @@ fn Renderer(comptime WriterType: type) type {
         }
 
         fn render(self: *Self) !void {
+            try self.renderCopyright();
             try self.writer.writeAll(preamble);
 
             for (self.registry.api_constants) |api_constant| {
@@ -309,6 +313,13 @@ fn Renderer(comptime WriterType: type) type {
             try self.renderWrappers();
         }
 
+        fn renderCopyright(self: *Self) !void {
+            var it = mem.split(self.registry.copyright, "\n");
+            while (it.next()) |line| {
+                try self.writer.print("// {}\n", .{line});
+            }
+        }
+
         fn renderApiConstant(self: *Self, api_constant: reg.ApiConstant) !void {
             try self.writer.writeAll("pub const ");
             try self.renderName(api_constant.name);