From 14f5bb167951ad893760cdb526364e9edf1213ef Mon Sep 17 00:00:00 2001
From: daurnimator <quae@daurnimator.com>
Date: Mon, 29 Jan 2018 14:59:25 +1100
Subject: src/: Export LUA_SIGNATURE as lua string instead of js string

---
 src/defs.js    |  2 +-
 src/lauxlib.js |  4 ++--
 src/ldo.js     |  2 +-
 src/ldump.js   | 10 ++--------
 src/lundump.js |  4 ++--
 5 files changed, 8 insertions(+), 14 deletions(-)

diff --git a/src/defs.js b/src/defs.js
index 13d2d1d..9eeea00 100644
--- a/src/defs.js
+++ b/src/defs.js
@@ -194,7 +194,7 @@ const from_userstring = function(str) {
 };
 
 /* mark for precompiled code ('<esc>Lua') */
-const LUA_SIGNATURE           = "\x1bLua";
+const LUA_SIGNATURE = to_luastring("\x1bLua");
 
 const LUA_VERSION_MAJOR       = "5";
 const LUA_VERSION_MINOR       = "3";
diff --git a/src/lauxlib.js b/src/lauxlib.js
index 41d00b4..7d46505 100644
--- a/src/lauxlib.js
+++ b/src/lauxlib.js
@@ -871,7 +871,7 @@ if (typeof process === "undefined") {
         }
         let com = skipcomment(lf);
         /* check for signature first, as we don't want to add line number corrections in binary case */
-        if (com.c === LUA_SIGNATURE.charCodeAt(0) && filename) {  /* binary file? */
+        if (com.c === LUA_SIGNATURE[0] && filename) {  /* binary file? */
             /* no need to re-open in node.js */
         } else if (com.skipped) { /* read initial portion */
             lf.buff[lf.n++] = '\n'.charCodeAt(0);  /* add line to correct line numbers */
@@ -939,7 +939,7 @@ if (typeof process === "undefined") {
         }
         let com = skipcomment(lf);
         /* check for signature first, as we don't want to add line number corrections in binary case */
-        if (com.c === LUA_SIGNATURE.charCodeAt(0) && filename) {  /* binary file? */
+        if (com.c === LUA_SIGNATURE[0] && filename) {  /* binary file? */
             /* no need to re-open in node.js */
         } else if (com.skipped) { /* read initial portion */
             lf.buff[lf.n++] = '\n'.charCodeAt(0);  /* add line to correct line numbers */
diff --git a/src/ldo.js b/src/ldo.js
index 82af33f..ce8f7bc 100644
--- a/src/ldo.js
+++ b/src/ldo.js
@@ -710,7 +710,7 @@ const checkmode = function(L, mode, x) {
 const f_parser = function(L, p) {
     let cl;
     let c = p.z.zgetc();  /* read first character */
-    if (c === LUA_SIGNATURE.charCodeAt(0)) {
+    if (c === LUA_SIGNATURE[0]) {
         checkmode(L, p.mode, to_luastring("binary", true));
         cl = lundump.luaU_undump(L, p.z, p.name);
     } else {
diff --git a/src/ldump.js b/src/ldump.js
index 09e5866..596a319 100644
--- a/src/ldump.js
+++ b/src/ldump.js
@@ -12,8 +12,7 @@ const {
         LUA_TNUMINT,
         LUA_TSHRSTR
     },
-    luastring_of,
-    to_luastring
+    luastring_of
 } = require('./defs.js');
 
 const LUAC_DATA    = luastring_of(25, 147, 13, 10, 26, 10);
@@ -37,11 +36,6 @@ const DumpBlock = function(b, size, D) {
         D.status = D.writer(D.L, b, size, D.data);
 };
 
-const DumpLiteral = function(s, D) {
-    s = to_luastring(s);
-    DumpBlock(s, s.length, D);
-};
-
 const DumpByte = function(y, D) {
     DumpBlock(luastring_of(y), 1, D);
 };
@@ -172,7 +166,7 @@ const DumpFunction = function(f, psource, D) {
 };
 
 const DumpHeader = function(D) {
-    DumpLiteral(LUA_SIGNATURE, D);
+    DumpBlock(LUA_SIGNATURE, LUA_SIGNATURE.length, D);
     DumpByte(LUAC_VERSION, D);
     DumpByte(LUAC_FORMAT, D);
     DumpBlock(LUAC_DATA, LUAC_DATA.length, D);
diff --git a/src/lundump.js b/src/lundump.js
index 7a9fde1..cf3fafa 100644
--- a/src/lundump.js
+++ b/src/lundump.js
@@ -56,7 +56,7 @@ class BytecodeParser {
 
         if (name[0] === 64 /* ('@').charCodeAt(0) */ || name[0] === 61 /* ('=').charCodeAt(0) */)
             this.name = name.subarray(1);
-        else if (name[0] == LUA_SIGNATURE.charCodeAt(0))
+        else if (name[0] == LUA_SIGNATURE[0])
             this.name = to_luastring("binary string", true);
         else
             this.name = name;
@@ -248,7 +248,7 @@ class BytecodeParser {
     }
 
     checkHeader() {
-        this.checkliteral(to_luastring(LUA_SIGNATURE.substring(1)), "not a"); /* 1st char already checked */
+        this.checkliteral(LUA_SIGNATURE.subarray(1), "not a"); /* 1st char already checked */
 
         if (this.readByte() !== 0x53)
             this.error("version mismatch in");
-- 
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