Move jsstring() from lobject.js to defs.js; export from lua.js

11 files changed, 81 insertions, 83 deletions

diff --git a/src/defs.js b/src/defs.js
index fd8038a..34316e9 100644
--- a/src/defs.js
+++ b/src/defs.js
@@ -134,6 +134,50 @@ class lua_Debug {
 
 }
 
+const to_jsstring = function(value, from, to) {
+    assert(Array.isArray(value), "jsstring expect a array of bytes");
+
+    let u0, u1, u2, u3, u4, u5;
+    let idx = 0;
+    value = value.slice(from ? from : 0, to);
+
+    var str = '';
+    while (1) {
+        // For UTF8 byte structure, see http://en.wikipedia.org/wiki/UTF-8#Description and https://www.ietf.org/rfc/rfc2279.txt and https://tools.ietf.org/html/rfc3629
+        u0 = value[idx++];
+        if (u0 === 0) { str += "\0"; continue; } // Lua string embed '\0'
+        if (!u0) return str;
+        if (!(u0 & 0x80)) { str += String.fromCharCode(u0); continue; }
+        u1 = value[idx++] & 63;
+        if ((u0 & 0xE0) == 0xC0) { str += String.fromCharCode(((u0 & 31) << 6) | u1); continue; }
+        u2 = value[idx++] & 63;
+        if ((u0 & 0xF0) == 0xE0) {
+            u0 = ((u0 & 15) << 12) | (u1 << 6) | u2;
+        } else {
+            u3 = value[idx++] & 63;
+            if ((u0 & 0xF8) == 0xF0) {
+                u0 = ((u0 & 7) << 18) | (u1 << 12) | (u2 << 6) | u3;
+            } else {
+                u4 = value[idx++] & 63;
+                if ((u0 & 0xFC) == 0xF8) {
+                    u0 = ((u0 & 3) << 24) | (u1 << 18) | (u2 << 12) | (u3 << 6) | u4;
+                } else {
+                    u5 = value[idx++] & 63;
+                    u0 = ((u0 & 1) << 30) | (u1 << 24) | (u2 << 18) | (u3 << 12) | (u4 << 6) | u5;
+                }
+            }
+        }
+        if (u0 < 0x10000) {
+            str += String.fromCharCode(u0);
+        } else {
+            var ch = u0 - 0x10000;
+            str += String.fromCharCode(0xD800 | (ch >> 10), 0xDC00 | (ch & 0x3FF));
+        }
+    }
+
+    return str;
+};
+
 const to_luastring_cache = {};
 
 const to_luastring = function(str, cache, maxBytesToWrite) {
@@ -277,4 +321,5 @@ module.exports.constant_types          = constant_types;
 module.exports.lua_Debug               = lua_Debug;
 module.exports.lua_upvalueindex        = lua_upvalueindex;
 module.exports.thread_status           = thread_status;
+module.exports.to_jsstring             = to_jsstring;
 module.exports.to_luastring            = to_luastring;
diff --git a/src/lauxlib.js b/src/lauxlib.js
index 7d48e11..bb2cd00 100644
--- a/src/lauxlib.js
+++ b/src/lauxlib.js
@@ -3,7 +3,6 @@
 
 const lapi    = require('./lapi.js');
 const lua     = require('./lua.js');
-const lobject = require('./lobject.js');
 const linit   = require('./linit.js');
 
 const LUA_LOADED_TABLE = "_LOADED";
@@ -59,7 +58,7 @@ const pushglobalfuncname = function(L, ar) {
     lua.lua_getfield(L, lua.LUA_REGISTRYINDEX, lua.to_luastring(LUA_LOADED_TABLE, true));
     if (findfield(L, top + 1, 2)) {
         let name = lua.lua_tostring(L, -1);
-        if (lobject.jsstring(name).startsWith("_G.")) {  /* name start with '_G.'? */
+        if (lua.to_jsstring(name).startsWith("_G.")) {  /* name start with '_G.'? */
             lua.lua_pushstring(L, name.slice(3));  /* push name without prefix */
             lua.lua_remove(L, -2);  /* remove original name */
         }
@@ -140,20 +139,20 @@ const luaL_argerror = function(L, arg, extramsg) {
     let ar = new lua.lua_Debug();
 
     if (!lua.lua_getstack(L, 0, ar))  /* no stack frame? */
-        return luaL_error(L, lua.to_luastring(`bad argument #${arg} (${lobject.jsstring(extramsg)})`));
+        return luaL_error(L, lua.to_luastring(`bad argument #${arg} (${lua.to_jsstring(extramsg)})`));
 
     lua.lua_getinfo(L, 'n', ar);
 
     if (ar.namewhat === lua.to_luastring('method', true)) {
         arg--;  /* do not count 'self' */
         if (arg === 0)  /* error is in the self argument itself? */
-            return luaL_error(L, lua.to_luastring(`calling '${lobject.jsstring(ar.name)}' on  bad self (${lobject.jsstring(extramsg)})`));
+            return luaL_error(L, lua.to_luastring(`calling '${lua.to_jsstring(ar.name)}' on  bad self (${lua.to_jsstring(extramsg)})`));
     }
 
     if (ar.name === null)
         ar.name = pushglobalfuncname(L, ar) ? lua.lua_tostring(L, -1) : ["?".charCodeAt(0)];
 
-    return luaL_error(L, lua.to_luastring(`bad argument #${arg} to '${lobject.jsstring(ar.name)}' (${lobject.jsstring(extramsg)})`));
+    return luaL_error(L, lua.to_luastring(`bad argument #${arg} to '${lua.to_jsstring(ar.name)}' (${lua.to_jsstring(extramsg)})`));
 };
 
 const typeerror = function(L, arg, tname) {
@@ -165,7 +164,7 @@ const typeerror = function(L, arg, tname) {
     else
         typearg = luaL_typename(L, arg);
 
-    let msg = lua.lua_pushstring(L, lua.to_luastring(`${lobject.jsstring(tname)} expected, got ${lobject.jsstring(typearg)}`));
+    let msg = lua.lua_pushstring(L, lua.to_luastring(`${lua.to_jsstring(tname)} expected, got ${lua.to_jsstring(typearg)}`));
     return luaL_argerror(L, arg, msg);
 };
 
@@ -174,7 +173,7 @@ const luaL_where = function(L, level) {
     if (lua.lua_getstack(L, level, ar)) {
         lua.lua_getinfo(L, lua.to_luastring("Sl", true), ar);
         if (ar.currentline > 0) {
-            lua.lua_pushstring(L, lua.to_luastring(`${lobject.jsstring(ar.short_src)}:${ar.currentline}:`));
+            lua.lua_pushstring(L, lua.to_luastring(`${lua.to_jsstring(ar.short_src)}:${ar.currentline}:`));
             return;
         }
     }
@@ -184,7 +183,7 @@ const luaL_where = function(L, level) {
 const luaL_error = function(L, fmt, ...args) {
     let i = 0;
 
-    fmt = lobject.jsstring(fmt);
+    fmt = lua.to_jsstring(fmt);
     // TODO: bypassing lua_pushvstring for now
     fmt = fmt.replace(/(^%[sfIpdcU]|([^%])%[sfIpdcU])/g, function (m, p1, p2, off) {
         return p2 ? p2 + args[i++] : args[i++];
@@ -205,7 +204,7 @@ const luaL_fileresult = function(L, stat, fname, e) {
     else {
         lua.lua_pushnil(L);
         if (fname)
-            lua.lua_pushstring(L, lua.to_luastring(`${lobject.jsstring(fname)}: ${e.message}`));
+            lua.lua_pushstring(L, lua.to_luastring(`${lua.to_jsstring(fname)}: ${e.message}`));
         else
             lua.lua_pushstring(L, lua.to_luastring(e.message));
         lua.lua_pushinteger(L, -e.errno);
@@ -460,7 +459,7 @@ const luaL_tolstring = function(L, idx) {
             default:
                 let tt = luaL_getmetafield(L, idx, lua.to_luastring("__name", true));
                 let kind = tt === lua.LUA_TSTRING ? lua.lua_tostring(L, -1) : luaL_typename(L, idx);
-                lua.lua_pushstring(L, lua.to_luastring(`${lobject.jsstring(kind)}: 0x${lapi.index2addr(L, -1).id.toString(16)}`));
+                lua.lua_pushstring(L, lua.to_luastring(`${lua.to_jsstring(kind)}: 0x${lapi.index2addr(L, -1).id.toString(16)}`));
                 if (tt !== lua.LUA_TNIL)
                     lua.lua_remove(L, -2);
                 break;
@@ -537,7 +536,7 @@ const luaL_setfuncs = function(L, l, nup) {
 const luaL_checkstack = function(L, space, msg) {
     if (!lua.lua_checkstack(L, space)) {
         if (msg)
-            luaL_error(L, lua.to_luastring(`stack overflow (${lobject.jsstring(msg)})`));
+            luaL_error(L, lua.to_luastring(`stack overflow (${lua.to_jsstring(msg)})`));
         else
             luaL_error(L, lua.to_luastring('stack overflow', true));
     }
@@ -592,7 +591,7 @@ if (typeof require === "function") {
         const errfile = function(L, what, fnameindex, error) {
             let serr = error.message;
             let filename = lua.lua_tostring(L, fnameindex).slice(1);
-            lua.lua_pushstring(L, lua.to_luastring(`cannot ${what} ${lobject.jsstring(filename)}: ${serr}`));
+            lua.lua_pushstring(L, lua.to_luastring(`cannot ${what} ${lua.to_jsstring(filename)}: ${serr}`));
             lua.lua_remove(L, fnameindex);
             return lua.LUA_ERRFILE;
         };
@@ -652,7 +651,7 @@ if (typeof require === "function") {
                 lua.lua_pushliteral(L, "=stdin");
                 lf.f = process.stdin.fd;
             } else {
-                let jsfilename = lobject.jsstring(filename);
+                let jsfilename = lua.to_jsstring(filename);
                 lua.lua_pushliteral(L, `@${jsfilename}`);
                 try {
                     lf.f = fs.openSync(jsfilename, "r");
diff --git a/src/lbaselib.js b/src/lbaselib.js
index fe329d6..5e3fff6 100644
--- a/src/lbaselib.js
+++ b/src/lbaselib.js
@@ -2,7 +2,6 @@
 
 const lua     = require('./lua.js');
 const lauxlib = require('./lauxlib.js');
-const lobject = require('./lobject.js');
 
 const luaB_print = function(L) {
     let n = lua.lua_gettop(L); /* number of arguments */
@@ -22,8 +21,8 @@ const luaB_print = function(L) {
     }
 
     // Don't use console.log if Node
-    if (process.stdout) process.stdout.write(lobject.jsstring(str) + "\n");
-    else console.log(lobject.jsstring(str));
+    if (process.stdout) process.stdout.write(lua.to_jsstring(str) + "\n");
+    else console.log(lua.to_jsstring(str));
     return 0;
 };
 
@@ -162,7 +161,7 @@ const luaB_tonumber = function(L) {
         lauxlib.luaL_checktype(L, 1, lua.LUA_TSTRING);  /* no numbers as strings */
         let s = lua.lua_tostring(L, 1);
         lauxlib.luaL_argcheck(L, 2 <= base && base <= 36, 2, lua.to_luastring("base out of range", true));
-        let n = parseInt(lobject.jsstring(s), base);
+        let n = parseInt(lua.to_jsstring(s), base);
         if (!isNaN(n)) {
             lua.lua_pushinteger(L, n);
             return 1;
diff --git a/src/ldebug.js b/src/ldebug.js
index 27caf8b..984f441 100644
--- a/src/ldebug.js
+++ b/src/ldebug.js
@@ -532,12 +532,12 @@ const varinfo = function(L, o) {
             kind = getobjname(ci.func.p, ci.pcOff, stkid - ci.u.l.base);
     }
 
-    return defs.to_luastring(kind ? ` (${lobject.jsstring(kind.funcname)} '${lobject.jsstring(kind.name.value ? kind.name.value : kind.name)}')` : ``);
+    return defs.to_luastring(kind ? ` (${defs.to_jsstring(kind.funcname)} '${defs.to_jsstring(kind.name.value ? kind.name.value : kind.name)}')` : ``);
 };
 
 const luaG_typeerror = function(L, o, op) {
     let t = ltm.luaT_objtypename(L, o);
-    luaG_runerror(L, defs.to_luastring(`attempt to ${lobject.jsstring(op)} a ${lobject.jsstring(t)} value${lobject.jsstring(varinfo(L, o))}`));
+    luaG_runerror(L, defs.to_luastring(`attempt to ${defs.to_jsstring(op)} a ${defs.to_jsstring(t)} value${defs.to_jsstring(varinfo(L, o))}`));
 };
 
 const luaG_concaterror = function(L, p1, p2) {
@@ -559,9 +559,9 @@ const luaG_ordererror = function(L, p1, p2) {
     let t1 = ltm.luaT_objtypename(L, p1);
     let t2 = ltm.luaT_objtypename(L, p2);
     if (t1.join() === t2.join())
-        luaG_runerror(L, defs.to_luastring(`attempt to compare two ${lobject.jsstring(t1)} values`));
+        luaG_runerror(L, defs.to_luastring(`attempt to compare two ${defs.to_jsstring(t1)} values`));
     else
-        luaG_runerror(L, defs.to_luastring(`attempt to compare ${lobject.jsstring(t1)} with ${lobject.jsstring(t2)}`));
+        luaG_runerror(L, defs.to_luastring(`attempt to compare ${defs.to_jsstring(t1)} with ${defs.to_jsstring(t2)}`));
 };
 
 /* add src:line information to 'msg' */
@@ -570,7 +570,7 @@ const luaG_addinfo = function(L, msg, src, line) {
     if (src)
         buff = lobject.luaO_chunkid(src, luaconf.LUA_IDSIZE);
 
-    L.stack[L.top++] = L.l_G.intern(defs.to_luastring(`${lobject.jsstring(buff)}:${line}: ${lobject.jsstring(msg)}`));
+    L.stack[L.top++] = L.l_G.intern(defs.to_luastring(`${defs.to_jsstring(buff)}:${line}: ${defs.to_jsstring(msg)}`));
 
     return L.stack[L.top - 1];
 };
@@ -601,7 +601,7 @@ const luaG_tointerror = function(L, p1, p2) {
     let temp = lvm.tointeger(p1);
     if (temp === false)
         p2 = p1;
-    luaG_runerror(L, defs.to_luastring(`number${lobject.jsstring(varinfo(L, p2))} has no integer representation`));
+    luaG_runerror(L, defs.to_luastring(`number${defs.to_jsstring(varinfo(L, p2))} has no integer representation`));
 };
 
 const luaG_traceexec = function(L) {
diff --git a/src/ldo.js b/src/ldo.js
index dccee08..9b845e7 100644
--- a/src/ldo.js
+++ b/src/ldo.js
@@ -555,7 +555,7 @@ class SParser {
 
 const checkmode = function(L, mode, x) {
     if (mode && mode.indexOf(x[0]) === -1) {
-        lapi.lua_pushstring(L, defs.to_luastring(`attempt to load a ${lobject.jsstring(x)} chunk (mode is '${lobject.jsstring(mode)}')`));
+        lapi.lua_pushstring(L, defs.to_luastring(`attempt to load a ${defs.to_jsstring(x)} chunk (mode is '${defs.to_jsstring(mode)}')`));
         luaD_throw(L, TS.LUA_ERRSYNTAX);
     }
 };
diff --git a/src/llex.js b/src/llex.js
index c19452c..da15b2f 100644
--- a/src/llex.js
+++ b/src/llex.js
@@ -159,7 +159,7 @@ const save = function(ls, c) {
 
 const luaX_token2str = function(ls, token) {
     if (typeof token === "string" || token < FIRST_RESERVED) {  /* single-byte symbols? */
-        return defs.to_luastring(`'${typeof token === "string" ? token : lobject.jsstring([token])}'`);
+        return defs.to_luastring(`'${typeof token === "string" ? token : defs.to_jsstring([token])}'`);
     } else {
         let s = luaX_tokens[token - FIRST_RESERVED];
         if (token < R.TK_EOS)  /* fixed format (symbols and reserved words)? */
@@ -283,7 +283,7 @@ const txtToken = function(ls, token) {
         case R.TK_NAME: case R.TK_STRING:
         case R.TK_FLT: case R.TK_INT:
             save(ls, 0);
-            return defs.to_luastring(`'${lobject.jsstring(ls.buff.buffer)}'`);
+            return defs.to_luastring(`'${defs.to_jsstring(ls.buff.buffer)}'`);
         default:
             return luaX_token2str(ls, token);
     }
@@ -292,7 +292,7 @@ const txtToken = function(ls, token) {
 const lexerror = function(ls, msg, token) {
     msg = ldebug.luaG_addinfo(ls.L, msg, ls.source, ls.linenumber);
     if (token)
-        lapi.lua_pushstring(ls.L, defs.to_luastring(`${msg instanceof TValue ? msg.jsstring() : msg} near ${lobject.jsstring(txtToken(ls, token))}`));
+        lapi.lua_pushstring(ls.L, defs.to_luastring(`${msg instanceof TValue ? msg.jsstring() : msg} near ${defs.to_jsstring(txtToken(ls, token))}`));
     ldo.luaD_throw(ls.L, TS.LUA_ERRSYNTAX);
 };
 
diff --git a/src/lobject.js b/src/lobject.js
index c2ec123..f02f8f3 100644
--- a/src/lobject.js
+++ b/src/lobject.js
@@ -117,7 +117,7 @@ class TValue {
     }
 
     jsstring(from, to) {
-        return jsstring(this.value, from, to);
+        return defs.to_jsstring(this.value, from, to);
     }
 
 }
@@ -125,50 +125,6 @@ class TValue {
 const luaO_nilobject = new TValue(CT.LUA_TNIL, null);
 module.exports.luaO_nilobject = luaO_nilobject;
 
-const jsstring = function(value, from, to) {
-    assert(Array.isArray(value), "jsstring expect a array of bytes");
-
-    let u0, u1, u2, u3, u4, u5;
-    let idx = 0;
-    value = value.slice(from ? from : 0, to);
-
-    var str = '';
-    while (1) {
-        // For UTF8 byte structure, see http://en.wikipedia.org/wiki/UTF-8#Description and https://www.ietf.org/rfc/rfc2279.txt and https://tools.ietf.org/html/rfc3629
-        u0 = value[idx++];
-        if (u0 === 0) { str += "\0"; continue; } // Lua string embed '\0'
-        if (!u0) return str;
-        if (!(u0 & 0x80)) { str += String.fromCharCode(u0); continue; }
-        u1 = value[idx++] & 63;
-        if ((u0 & 0xE0) == 0xC0) { str += String.fromCharCode(((u0 & 31) << 6) | u1); continue; }
-        u2 = value[idx++] & 63;
-        if ((u0 & 0xF0) == 0xE0) {
-            u0 = ((u0 & 15) << 12) | (u1 << 6) | u2;
-        } else {
-            u3 = value[idx++] & 63;
-            if ((u0 & 0xF8) == 0xF0) {
-                u0 = ((u0 & 7) << 18) | (u1 << 12) | (u2 << 6) | u3;
-            } else {
-                u4 = value[idx++] & 63;
-                if ((u0 & 0xFC) == 0xF8) {
-                    u0 = ((u0 & 3) << 24) | (u1 << 18) | (u2 << 12) | (u3 << 6) | u4;
-                } else {
-                    u5 = value[idx++] & 63;
-                    u0 = ((u0 & 1) << 30) | (u1 << 24) | (u2 << 18) | (u3 << 12) | (u4 << 6) | u5;
-                }
-            }
-        }
-        if (u0 < 0x10000) {
-            str += String.fromCharCode(u0);
-        } else {
-            var ch = u0 - 0x10000;
-            str += String.fromCharCode(0xD800 | (ch >> 10), 0xDC00 | (ch & 0x3FF));
-        }
-    }
-
-    return str;
-};
-
 const table_keyValue = function(key) {
     // Those lua values are used by value, others by reference
     if (key instanceof TValue) {
@@ -398,11 +354,11 @@ const lua_strx2number = function(s) {
         e += exp1;
     }
     if (neg) r = -r;
-    return jsstring(s).trim().search(/s/) < 0 ? ldexp(r, e) : null;  /* Only valid if nothing left is s*/
+    return defs.to_jsstring(s).trim().search(/s/) < 0 ? ldexp(r, e) : null;  /* Only valid if nothing left is s*/
 };
 
 const l_str2dloc = function(s, mode) {
-    let flt = mode === 'x' ? lua_strx2number(s) : parseFloat(jsstring(s));
+    let flt = mode === 'x' ? lua_strx2number(s) : parseFloat(defs.to_jsstring(s));
     return !isNaN(flt) ? flt : null;  /* OK if no trailing characters */
 };
 
@@ -552,7 +508,6 @@ module.exports.TValue         = TValue;
 module.exports.UTF8BUFFSZ     = UTF8BUFFSZ;
 module.exports.frexp          = frexp;
 module.exports.intarith       = intarith;
-module.exports.jsstring       = jsstring;
 module.exports.ldexp          = ldexp;
 module.exports.luaO_chunkid   = luaO_chunkid;
 module.exports.luaO_hexavalue = luaO_hexavalue;
diff --git a/src/lparser.js b/src/lparser.js
index 9ba5941..41a0b22 100644
--- a/src/lparser.js
+++ b/src/lparser.js
@@ -159,7 +159,7 @@ const semerror = function(ls, msg) {
 };
 
 const error_expected = function(ls, token) {
-    llex.luaX_syntaxerror(ls, defs.to_luastring(`${lobject.jsstring(llex.luaX_token2str(ls, token))} expected`));
+    llex.luaX_syntaxerror(ls, defs.to_luastring(`${defs.to_jsstring(llex.luaX_token2str(ls, token))} expected`));
 };
 
 const errorlimit = function(fs, limit, what) {
@@ -204,7 +204,7 @@ const check_match = function(ls, what, who, where) {
             error_expected(ls, what);
         else
             llex.luaX_syntaxerror(ls,
-                defs.to_luastring(`${lobject.jsstring(llex.luaX_token2str(ls, what))} expected (to close ${lobject.jsstring(llex.luaX_token2str(ls, who))} at line ${where}`));
+                defs.to_luastring(`${defs.to_jsstring(llex.luaX_token2str(ls, what))} expected (to close ${defs.to_jsstring(llex.luaX_token2str(ls, who))} at line ${where}`));
     }
 };
 
diff --git a/src/lstrlib.js b/src/lstrlib.js
index 370e672..5bd08d4 100644
--- a/src/lstrlib.js
+++ b/src/lstrlib.js
@@ -346,7 +346,7 @@ const str_format = function(L) {
                             lua.lua_pop(L, 1);  /* remove result from 'luaL_tolstring' */
                         } else {  /* format the string into 'buff' */
                             // TODO: will failt if s is not valid UTF-8
-                            concat(b, lua.to_luastring(sprintf(String.fromCharCode(...form), lobject.jsstring(s))));
+                            concat(b, lua.to_luastring(sprintf(String.fromCharCode(...form), lua.to_jsstring(s))));
                             lua.lua_pop(L, 1);  /* remove result from 'luaL_tolstring' */
                         }
                     }
@@ -642,13 +642,13 @@ const str_reverse = function(L) {
 
 const str_lower = function(L) {
     // TODO: will fail on invalid UTF-8
-    lua.lua_pushstring(L, lua.to_luastring(lobject.jsstring(lauxlib.luaL_checkstring(L, 1)).toLowerCase()));
+    lua.lua_pushstring(L, lua.to_luastring(lua.to_jsstring(lauxlib.luaL_checkstring(L, 1)).toLowerCase()));
     return 1;
 };
 
 const str_upper = function(L) {
     // TODO: will fail on invalid UTF-8
-    lua.lua_pushstring(L, lua.to_luastring(lobject.jsstring(lauxlib.luaL_checkstring(L, 1)).toUpperCase()));
+    lua.lua_pushstring(L, lua.to_luastring(lua.to_jsstring(lauxlib.luaL_checkstring(L, 1)).toUpperCase()));
     return 1;
 };
 
@@ -1319,7 +1319,7 @@ const add_value = function(ms, b, s, e, tr) {
         lua.lua_pop(L, 1);
         lua.lua_pushlstring(L, s, e - s);  /* keep original text */
     } else if (!lua.lua_isstring(L, -1))
-        lauxlib.luaL_error(L, lua.to_luastring(`invalid replacement value (a ${lobject.jsstring(lauxlib.luaL_typename(L, -1))})`));
+        lauxlib.luaL_error(L, lua.to_luastring(`invalid replacement value (a ${lua.to_jsstring(lauxlib.luaL_typename(L, -1))})`));
         lauxlib.luaL_addvalue(b);  /* add result to accumulator */
 };
 
diff --git a/src/ltablib.js b/src/ltablib.js
index bc283ae..78c71e4 100644
--- a/src/ltablib.js
+++ b/src/ltablib.js
@@ -4,7 +4,6 @@ const lua     = require('./lua.js');
 const lapi    = require('./lapi.js');
 const lauxlib = require('./lauxlib.js');
 const llimit  = require('./llimit.js');
-const lobject = require('./lobject.js');
 
 
 /*
@@ -47,7 +46,7 @@ const aux_getn = function(L, n, w) {
 const addfield = function(L, b, i) {
     lua.lua_geti(L, 1, i);
     if (!lua.lua_isstring(L, -1))
-        lauxlib.luaL_error(L, lua.to_luastring(`invalid value (${lobject.jsstring(lauxlib.luaL_typename(L, -1))}) at index ${i} in table for 'concat'`));
+        lauxlib.luaL_error(L, lua.to_luastring(`invalid value (${lua.to_jsstring(lauxlib.luaL_typename(L, -1))}) at index ${i} in table for 'concat'`));
 
     lauxlib.luaL_addvalue(b);
 };
diff --git a/src/lua.js b/src/lua.js
index ce0def4..e6e3f02 100644
--- a/src/lua.js
+++ b/src/lua.js
@@ -79,6 +79,7 @@ module.exports.LUA_VERSUFFIX           = defs.LUA_VERSUFFIX;
 module.exports.LUA_YIELD               = defs.thread_status.LUA_YIELD;
 module.exports.lua_Debug               = defs.lua_Debug;
 module.exports.lua_upvalueindex        = defs.lua_upvalueindex;
+module.exports.to_jsstring             = defs.to_jsstring;
 module.exports.to_luastring            = defs.to_luastring;
 
 module.exports.lua_absindex            = lapi.lua_absindex;