From bd00f619777e4f37bba0b0a7017559aebc3a8335 Mon Sep 17 00:00:00 2001
From: Luna <git@l4.pm>
Date: Sun, 7 Jul 2019 15:04:25 -0300
Subject: [PATCH] add helpers for c string construction

---
 src/main.zig | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/src/main.zig b/src/main.zig
index 4e60afe..d66ecf5 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -43,6 +43,11 @@ fn Lv2Core(ns: []const u8) ![]const u8 {
     );
 }
 
+fn makeCStr(data: []const u8) ![]u8 {
+    var allocator = std.heap.direct_allocator;
+    return std.cstr.addNullByte(allocator, data);
+}
+
 /// Control port value set from the command line
 const Param = struct {
     /// Port symbol
@@ -131,6 +136,10 @@ const LV2Apply = struct {
         self.params.deinit();
     }
 
+    pub fn makeCStr(self: *LV2Apply, data: []const u8) ![]u8 {
+        return std.cstr.addNullByte(self.allocator, data);
+    }
+
     pub fn createPorts(self: *LV2Apply) !i32 {
         var world = self.world;
         const n_ports: u32 = c.lilv_plugin_get_num_ports(self.plugin);
@@ -327,9 +336,9 @@ pub fn main() !void {
         return;
     }
 
-    self.in_path = in_path.?;
-    self.out_path = out_path.?;
-    var plugin_uri = try std.cstr.addNullByte(self.allocator, plugin_uri_opt.?);
+    self.in_path = try self.makeCStr(in_path.?);
+    self.out_path = try self.makeCStr(out_path.?);
+    var plugin_uri = try self.makeCStr(plugin_uri_opt.?);
 
     self.world = c.lilv_world_new().?;
     var uri: *c.LilvNode = c.lilv_new_uri(self.world, plugin_uri.ptr) orelse blk: {