Introduce luastring_indexOf as Uint8Array.indexOf doesn't exist everywhere

9 files changed, 44 insertions, 28 deletions

diff --git a/src/defs.js b/src/defs.js
index c0b3bda..fc18707 100644
--- a/src/defs.js
+++ b/src/defs.js
@@ -144,6 +144,20 @@ if (typeof Uint8Array.from === "function") {
     };
 }
 
+let luastring_indexOf;
+if (typeof (new Uint8Array().indexOf) === "function") {
+    luastring_indexOf = function(s, v, i) {
+        return s.indexOf(v, i);
+    };
+} else {
+    /* Browsers that don't support Uint8Array.indexOf seem to allow using Array.indexOf on Uint8Array objects e.g. IE11 */
+    let array_indexOf = [].indexOf;
+    if (array_indexOf.call(new Uint8Array(1), 0) !== 0) throw Error("missing .indexOf");
+    luastring_indexOf = function(s, v, i) {
+        return array_indexOf.call(s, v, i);
+    };
+}
+
 let luastring_of;
 if (typeof Uint8Array.of === "function") {
     luastring_of = Uint8Array.of.bind(Uint8Array);
@@ -482,6 +496,7 @@ module.exports.thread_status           = thread_status;
 module.exports.is_luastring            = is_luastring;
 module.exports.luastring_eq            = luastring_eq;
 module.exports.luastring_from          = luastring_from;
+module.exports.luastring_indexOf       = luastring_indexOf;
 module.exports.luastring_of            = luastring_of;
 module.exports.to_jsstring             = to_jsstring;
 module.exports.to_luastring            = to_luastring;
diff --git a/src/ldblib.js b/src/ldblib.js
index e687ec1..7e08dc5 100644
--- a/src/ldblib.js
+++ b/src/ldblib.js
@@ -136,29 +136,29 @@ const db_getinfo = function(L) {
     if (!lua.lua_getinfo(L1, options, ar))
         lauxlib.luaL_argerror(L, arg + 2, lua.to_luastring("invalid option", true));
     lua.lua_newtable(L);  /* table to collect results */
-    if (options.indexOf('S'.charCodeAt(0)) > -1) {
+    if (lua.luastring_indexOf(options, 'S'.charCodeAt(0)) > -1) {
         settabss(L, lua.to_luastring("source", true), ar.source);
         settabss(L, lua.to_luastring("short_src", true), ar.short_src);
         settabsi(L, lua.to_luastring("linedefined", true), ar.linedefined);
         settabsi(L, lua.to_luastring("lastlinedefined", true), ar.lastlinedefined);
         settabss(L, lua.to_luastring("what", true), ar.what);
     }
-    if (options.indexOf('l'.charCodeAt(0)) > -1)
+    if (lua.luastring_indexOf(options, 'l'.charCodeAt(0)) > -1)
         settabsi(L, lua.to_luastring("currentline", true), ar.currentline);
-    if (options.indexOf('u'.charCodeAt(0)) > -1) {
+    if (lua.luastring_indexOf(options, 'u'.charCodeAt(0)) > -1) {
         settabsi(L, lua.to_luastring("nups", true), ar.nups);
         settabsi(L, lua.to_luastring("nparams", true), ar.nparams);
         settabsb(L, lua.to_luastring("isvararg", true), ar.isvararg);
     }
-    if (options.indexOf('n'.charCodeAt(0)) > - 1) {
+    if (lua.luastring_indexOf(options, 'n'.charCodeAt(0)) > -1) {
         settabss(L, lua.to_luastring("name", true), ar.name);
         settabss(L, lua.to_luastring("namewhat", true), ar.namewhat);
     }
-    if (options.indexOf('t'.charCodeAt(0)) > - 1)
+    if (lua.luastring_indexOf(options, 't'.charCodeAt(0)) > -1)
         settabsb(L, lua.to_luastring("istailcall", true), ar.istailcall);
-    if (options.indexOf('L'.charCodeAt(0)) > - 1)
+    if (lua.luastring_indexOf(options, 'L'.charCodeAt(0)) > -1)
         treatstackoption(L, L1, lua.to_luastring("activelines", true));
-    if (options.indexOf('f'.charCodeAt(0)) > - 1)
+    if (lua.luastring_indexOf(options, 'f'.charCodeAt(0)) > -1)
         treatstackoption(L, L1, lua.to_luastring("func", true));
     return 1;  /* return table */
 };
@@ -291,9 +291,9 @@ const hookf = function(L, ar) {
 */
 const makemask = function(smask, count) {
     let mask = 0;
-    if (smask.indexOf("c".charCodeAt(0)) > -1) mask |= lua.LUA_MASKCALL;
-    if (smask.indexOf("r".charCodeAt(0)) > -1) mask |= lua.LUA_MASKRET;
-    if (smask.indexOf("l".charCodeAt(0)) > -1) mask |= lua.LUA_MASKLINE;
+    if (lua.luastring_indexOf(smask, "c".charCodeAt(0)) > -1) mask |= lua.LUA_MASKCALL;
+    if (lua.luastring_indexOf(smask, "r".charCodeAt(0)) > -1) mask |= lua.LUA_MASKRET;
+    if (lua.luastring_indexOf(smask, "l".charCodeAt(0)) > -1) mask |= lua.LUA_MASKLINE;
     if (count > 0) mask |= lua.LUA_MASKCOUNT;
     return mask;
 };
diff --git a/src/ldebug.js b/src/ldebug.js
index 3d722e1..d7a58e0 100644
--- a/src/ldebug.js
+++ b/src/ldebug.js
@@ -283,13 +283,13 @@ const lua_getinfo = function(L, what, ar) {
 
     cl = func.ttisclosure() ? func.value : null;
     status = auxgetinfo(L, what, ar, cl, ci);
-    if (what.indexOf('f'.charCodeAt(0)) >= 0) {
+    if (defs.luastring_indexOf(what, 'f'.charCodeAt(0)) >= 0) {
         lobject.pushobj2s(L, func);
         assert(L.top <= L.ci.top, "stack overflow");
     }
 
     swapextra(L);
-    if (what.indexOf('L'.charCodeAt(0)) >= 0)
+    if (defs.luastring_indexOf(what, 'L'.charCodeAt(0)) >= 0)
         collectvalidlines(L, cl);
 
     return status;
diff --git a/src/ldo.js b/src/ldo.js
index 3adedd4..88608ce 100644
--- a/src/ldo.js
+++ b/src/ldo.js
@@ -675,7 +675,7 @@ class SParser {
 }
 
 const checkmode = function(L, mode, x) {
-    if (mode && mode.indexOf(x[0]) === -1) {
+    if (mode && defs.luastring_indexOf(mode, x[0]) === -1) {
         lobject.luaO_pushfstring(L,
             defs.to_luastring("attempt to load a %s chunk (mode is '%s')"), x, mode);
         luaD_throw(L, TS.LUA_ERRSYNTAX);
diff --git a/src/loadlib.js b/src/loadlib.js
index 0be1742..c859798 100644
--- a/src/loadlib.js
+++ b/src/loadlib.js
@@ -265,7 +265,7 @@ const addtoclib = function(L, path, plib) {
 const pushnexttemplate = function(L, path) {
     while (path[0] === lua.LUA_PATH_SEP.charCodeAt(0)) path = path.slice(1);  /* skip separators */
     if (path.length === 0) return null;  /* no more templates */
-    let l = path.indexOf(lua.LUA_PATH_SEP.charCodeAt(0));  /* find next separator */
+    let l = lua.luastring_indexOf(path, lua.LUA_PATH_SEP.charCodeAt(0));  /* find next separator */
     if (l < 0) l = path.length;
     lua.lua_pushlstring(L, path, l);  /* template */
     return path.slice(l);
@@ -340,7 +340,7 @@ const searcher_Lua = function(L) {
 const loadfunc = function(L, filename, modname) {
     let openfunc;
     modname = lauxlib.luaL_gsub(L, modname, lua.to_luastring("."), LUA_OFSEP);
-    let mark = modname.indexOf(LUA_IGMARK.charCodeAt(0));
+    let mark = lua.luastring_indexOf(modname, LUA_IGMARK.charCodeAt(0));
     if (mark >= 0) {
         openfunc = lua.lua_pushlstring(L, modname, mark);
         openfunc = lua.lua_pushfstring(L, lua.to_luastring("%s%s"), LUA_POF, openfunc);
@@ -361,7 +361,7 @@ const searcher_C = function(L) {
 
 const searcher_Croot = function(L) {
     let name = lauxlib.luaL_checkstring(L, 1);
-    let p = name.indexOf('.'.charCodeAt(0));
+    let p = lua.luastring_indexOf(name, '.'.charCodeAt(0));
     let stat;
     if (p < 0) return 0;  /* is root */
     lua.lua_pushlstring(L, name, p);
diff --git a/src/lobject.js b/src/lobject.js
index b5d4a96..384facd 100644
--- a/src/lobject.js
+++ b/src/lobject.js
@@ -318,7 +318,7 @@ const luaO_chunkid = function(source, bufflen) {
         }
     } else {  /* string; format as [string "source"] */
         out = new Uint8Array(bufflen);
-        let nli = source.indexOf(char['\n']);  /* find first new line (if any) */
+        let nli = defs.luastring_indexOf(source, char['\n']);  /* find first new line (if any) */
         out.set(PRE);  /* add prefix */
         let out_i = PRE.length;
         bufflen -= PRE.length + RETS.length + POS.length;  /* save space for prefix+suffix */
@@ -539,7 +539,7 @@ const luaO_pushvfstring = function(L, fmt, argp) {
     let a = 0;
     let e;
     for (;;) {
-        e = fmt.indexOf(char['%'], i);
+        e = defs.luastring_indexOf(fmt, char['%'], i);
         if (e == -1) break;
         pushstr(L, fmt.subarray(i, e));
         switch(fmt[e+1]) {
@@ -549,7 +549,7 @@ const luaO_pushvfstring = function(L, fmt, argp) {
                 else {
                     s = defs.from_userstring(s);
                     /* respect null terminator */
-                    let i = s.indexOf(0);
+                    let i = defs.luastring_indexOf(s, 0);
                     if (i !== -1)
                         s = s.subarray(0, i);
                 }
diff --git a/src/loslib.js b/src/loslib.js
index ecd42f1..ee9ddca 100644
--- a/src/loslib.js
+++ b/src/loslib.js
@@ -112,7 +112,7 @@ const os_date = function(L) {
             } else {
                 i++;  /* skip '%' */
                 i = checkoption(L, s, i, cc.subarray(1));  /* copy specifier to 'cc' */
-                let len = cc.indexOf(0);
+                let len = lua.luastring_indexOf(cc, 0);
                 if (len !== -1)
                     cc = cc.subarray(0, len);
                 let buff = strftime(lua.to_jsstring(cc), stm);
diff --git a/src/lstrlib.js b/src/lstrlib.js
index bd26eba..73dcfb7 100644
--- a/src/lstrlib.js
+++ b/src/lstrlib.js
@@ -22,7 +22,7 @@ const MAXSIZE = 2147483647;
 
 /* Give natural (i.e. strings end at the first \0) length of a string represented by an array of bytes */
 const strlen = function(s) {
-    let len = s.indexOf(0);
+    let len = lua.luastring_indexOf(s, 0);
     return len > -1 ? len : s.length;
 };
 
@@ -181,9 +181,9 @@ const addquoted = function(b, s, len) {
 ** Ensures the 'buff' string uses a dot as the radix character.
 */
 const checkdp = function(buff) {
-    if (buff.indexOf('.'.charCodeAt(0)) < 0) {  /* no dot? */
+    if (lua.luastring_indexOf(buff, '.'.charCodeAt(0)) < 0) {  /* no dot? */
         let point = luaconf.lua_getlocaledecpoint().charCodeAt(0);  /* try locale point */
-        let ppoint = buff.indexOf(point);
+        let ppoint = lua.luastring_indexOf(buff, point);
         if (ppoint) buff[ppoint] = '.';  /* change it to a dot */
     }
 };
@@ -224,7 +224,7 @@ const addliteral = function(L, b, arg) {
 
 const scanformat = function(L, strfrmt, i, form) {
     let p = i;
-    while (strfrmt[p] !== 0 && FLAGS.indexOf(strfrmt[p]) >= 0) p++;  /* skip flags */
+    while (strfrmt[p] !== 0 && lua.luastring_indexOf(FLAGS, strfrmt[p]) >= 0) p++;  /* skip flags */
     if (p - i >= FLAGS.length)
         lauxlib.luaL_error(L, lua.to_luastring("invalid format (repeated flags)", true));
     if (isdigit(strfrmt[p])) p++;  /* skip width */
@@ -307,7 +307,7 @@ const str_format = function(L) {
                         lauxlib.luaL_addvalue(b);  /* keep entire string */
                     } else {
                         lauxlib.luaL_argcheck(L, s.length === strlen(s), arg, lua.to_luastring("string contains zeros", true));
-                        if (form.indexOf('.'.charCodeAt(0)) < 0 && s.length >= 100) {
+                        if (lua.luastring_indexOf(form, '.'.charCodeAt(0)) < 0 && s.length >= 100) {
                             /* no precision and string is too long to be formatted */
                             lauxlib.luaL_addvalue(b);  /* keep entire string */
                         } else {  /* format the string into 'buff' */
@@ -578,7 +578,7 @@ const str_pack = function(L) {
             case KOption.Kzstr: {  /* zero-terminated string */
                 let s = lauxlib.luaL_checkstring(L, arg);
                 let len = s.length;
-                lauxlib.luaL_argcheck(L, s.indexOf(0) < 0, arg, lua.to_luastring("strings contains zeros", true));
+                lauxlib.luaL_argcheck(L, lua.luastring_indexOf(s, 0) < 0, arg, lua.to_luastring("strings contains zeros", true));
                 lauxlib.luaL_addlstring(b, s, len);
                 lauxlib.luaL_addchar(b, 0);  /* add zero at the end */
                 totalsize += len + 1;
@@ -774,7 +774,7 @@ const str_unpack = function(L) {
                 break;
             }
             case KOption.Kzstr: {
-                let len = data.slice(pos).indexOf(0);
+                let len = lua.luastring_indexOf(data.slice(pos), 0);
                 lua.lua_pushstring(L, data.slice(pos, pos + len));
                 pos += len + 1;  /* skip string plus final '\0' */
                 break;
@@ -969,7 +969,7 @@ const array_cmp = function(a, ai, b, bi, len) {
         return true;
     let aj = ai+len;
     loop: for (;;) {
-        ai = a.indexOf(b[bi], ai);
+        ai = lua.luastring_indexOf(a, b[bi], ai);
         if (ai === -1 || ai >= aj)
             return false;
         for (let j = 1; j < len; j++) {
diff --git a/src/lua.js b/src/lua.js
index ccdafd1..a5b290c 100644
--- a/src/lua.js
+++ b/src/lua.js
@@ -79,6 +79,7 @@ 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.luastring_eq            = defs.luastring_eq;
+module.exports.luastring_indexOf       = defs.luastring_indexOf;
 module.exports.luastring_of            = defs.luastring_of;
 module.exports.to_jsstring             = defs.to_jsstring;
 module.exports.to_luastring            = defs.to_luastring;