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-rw-r--r--src/lauxlib.js252
1 files changed, 128 insertions, 124 deletions
diff --git a/src/lauxlib.js b/src/lauxlib.js
index 689abbb..f175fde 100644
--- a/src/lauxlib.js
+++ b/src/lauxlib.js
@@ -401,139 +401,143 @@ const luaL_newlib = function(L, l) {
};
// Only with Node
-if (typeof window === "undefined") {
- const fs = require('fs');
-
- class LoadF {
- constructor() {
- this.n = NaN; /* number of pre-read characters */
- this.f = null; /* file being read */
- this.buff = new Buffer(1024); /* area for reading file */
- this.pos = 0; /* current position in file */
- this.binary = false;
+if (typeof require === "function") {
+ let fs = false;
+ try {
+ fs = require('fs');
+ } catch (e) {}
+
+ if (fs) {
+ class LoadF {
+ constructor() {
+ this.n = NaN; /* number of pre-read characters */
+ this.f = null; /* file being read */
+ this.buff = new Buffer(1024); /* area for reading file */
+ this.pos = 0; /* current position in file */
+ this.binary = false;
+ }
}
- }
- const toDataView = function(buffer) {
- let ab = new ArrayBuffer(buffer.length);
- let au = new Uint8Array(ab);
- for (let i = 0; i < buffer.length; i++)
- au[i] = buffer[i];
- return new DataView(ab);
- };
-
- const getF = function(L, ud) {
- let lf = ud;
- let bytes = 0;
- if (lf.n > 0) { /* are there pre-read characters to be read? */
- lf.n = 0; /* no more pre-read characters */
- } else { /* read a block from file */
- lf.buff.fill(0);
- bytes = fs.readSync(lf.f, lf.buff, 0, lf.buff.length, lf.pos); /* read block */
+ const toDataView = function(buffer) {
+ let ab = new ArrayBuffer(buffer.length);
+ let au = new Uint8Array(ab);
+ for (let i = 0; i < buffer.length; i++)
+ au[i] = buffer[i];
+ return new DataView(ab);
+ };
+
+ const getF = function(L, ud) {
+ let lf = ud;
+ let bytes = 0;
+ if (lf.n > 0) { /* are there pre-read characters to be read? */
+ lf.n = 0; /* no more pre-read characters */
+ } else { /* read a block from file */
+ lf.buff.fill(0);
+ bytes = fs.readSync(lf.f, lf.buff, 0, lf.buff.length, lf.pos); /* read block */
+ lf.pos += bytes;
+ }
+ if (bytes > 0)
+ return lf.binary ? toDataView(lf.buff) : new lobject.TValue(0, lf.buff).jsstring(); // TODO: Here reading utf8 only
+ else return null;
+ };
+
+ const errfile = function(L, what, fnameindex, error) {
+ let serr = error.message;
+ let filename = lapi.lua_tostring(L, fnameindex).slice(1);
+ lapi.lua_pushstring(L, `cannot ${what} ${filename}: ${serr}`);
+ lapi.lua_remove(L, fnameindex);
+ return lua.thread_status.LUA_ERRFILE;
+ };
+
+ const getc = function(lf) {
+ let b = new Buffer(1);
+ let bytes = fs.readSync(lf.f, b, 0, 1, lf.pos);
lf.pos += bytes;
- }
- if (bytes > 0)
- return lf.binary ? toDataView(lf.buff) : new lobject.TValue(0, lf.buff).jsstring(); // TODO: Here reading utf8 only
- else return null;
- };
-
- const errfile = function(L, what, fnameindex, error) {
- let serr = error.message;
- let filename = lapi.lua_tostring(L, fnameindex).slice(1);
- lapi.lua_pushstring(L, `cannot ${what} ${filename}: ${serr}`);
- lapi.lua_remove(L, fnameindex);
- return lua.thread_status.LUA_ERRFILE;
- };
-
- const getc = function(lf) {
- let b = new Buffer(1);
- let bytes = fs.readSync(lf.f, b, 0, 1, lf.pos);
- lf.pos += bytes;
- return bytes > 0 ? b.readUInt8() : null;
- };
-
- const skipBOM = function(lf) {
- let p = "\xEF\xBB\xBF"; /* UTF-8 BOM mark */
- lf.n = 0;
- let c;
- do {
- c = getc(lf);
- if (c === null || c !== p.charCodeAt(0)) return c;
- p = p.slice(1);
- lf.buff[lf.n++] = c; /* to be read by the parser */
- } while (p.length > 0);
- lf.n = 0; /* prefix matched; discard it */
- return getc(lf); /* return next character */
- };
-
- /*
- ** reads the first character of file 'f' and skips an optional BOM mark
- ** in its beginning plus its first line if it starts with '#'. Returns
- ** true if it skipped the first line. In any case, '*cp' has the
- ** first "valid" character of the file (after the optional BOM and
- ** a first-line comment).
- */
- const skipcomment = function(lf) {
- let c = skipBOM(lf);
- if (c === '#'.charCodeAt(0)) { /* first line is a comment (Unix exec. file)? */
- do { /* skip first line */
+ return bytes > 0 ? b.readUInt8() : null;
+ };
+
+ const skipBOM = function(lf) {
+ let p = "\xEF\xBB\xBF"; /* UTF-8 BOM mark */
+ lf.n = 0;
+ let c;
+ do {
c = getc(lf);
- } while (c && c !== '\n'.charCodeAt(0));
-
- return {
- skipped: true,
- c: getc(lf) /* skip end-of-line, if present */
- };
- } else {
- lf.pos--;
- return {
- skipped: false,
- c: c
- };
- }
- };
-
- const luaL_loadfilex = function(L, filename, mode) {
- let lf = new LoadF();
- let fnameindex = lapi.lua_gettop(L) + 1; /* index of filename on the stack */
- if (filename === null) {
- lapi.lua_pushliteral(L, "=stdin");
- lf.f = process.stdin.fd;
- } else {
- lapi.lua_pushstring(L, `@${filename}`);
- try {
- lf.f = fs.openSync(filename, "r");
- } catch (e) {
- return errfile(L, "open", fnameindex, e);
+ if (c === null || c !== p.charCodeAt(0)) return c;
+ p = p.slice(1);
+ lf.buff[lf.n++] = c; /* to be read by the parser */
+ } while (p.length > 0);
+ lf.n = 0; /* prefix matched; discard it */
+ return getc(lf); /* return next character */
+ };
+
+ /*
+ ** reads the first character of file 'f' and skips an optional BOM mark
+ ** in its beginning plus its first line if it starts with '#'. Returns
+ ** true if it skipped the first line. In any case, '*cp' has the
+ ** first "valid" character of the file (after the optional BOM and
+ ** a first-line comment).
+ */
+ const skipcomment = function(lf) {
+ let c = skipBOM(lf);
+ if (c === '#'.charCodeAt(0)) { /* first line is a comment (Unix exec. file)? */
+ do { /* skip first line */
+ c = getc(lf);
+ } while (c && c !== '\n'.charCodeAt(0));
+
+ return {
+ skipped: true,
+ c: getc(lf) /* skip end-of-line, if present */
+ };
+ } else {
+ lf.pos--;
+ return {
+ skipped: false,
+ c: c
+ };
}
- }
-
- try {
- let com;
- if ((com = skipcomment(lf)).skipped) /* read initial portion */
- lf.buff[lf.n++] = '\n'.charCodeAt(0); /* add line to correct line numbers */
-
- if (com.c === lua.LUA_SIGNATURE.charCodeAt(0) && filename) { /* binary file? */
- lf.binary = true;
+ };
+
+ const luaL_loadfilex = function(L, filename, mode) {
+ let lf = new LoadF();
+ let fnameindex = lapi.lua_gettop(L) + 1; /* index of filename on the stack */
+ if (filename === null) {
+ lapi.lua_pushliteral(L, "=stdin");
+ lf.f = process.stdin.fd;
+ } else {
+ lapi.lua_pushstring(L, `@${filename}`);
+ try {
+ lf.f = fs.openSync(filename, "r");
+ } catch (e) {
+ return errfile(L, "open", fnameindex, e);
+ }
}
- let status = lapi.lua_load(L, getF, lf, lapi.lua_tostring(L, -1), mode);
- if (filename) fs.closeSync(lf.f); /* close file (even in case of errors) */
- lapi.lua_remove(L, fnameindex);
- return status;
- } catch (err) {
- lapi.lua_settop(L, fnameindex); /* ignore results from 'lua_load' */
- return errfile(L, "read", fnameindex);
- }
- };
-
- const luaL_loadfile = function(L, filename) {
- return luaL_loadfilex(L, filename, null);
- };
+ try {
+ let com;
+ if ((com = skipcomment(lf)).skipped) /* read initial portion */
+ lf.buff[lf.n++] = '\n'.charCodeAt(0); /* add line to correct line numbers */
+
+ if (com.c === lua.LUA_SIGNATURE.charCodeAt(0) && filename) { /* binary file? */
+ lf.binary = true;
+ }
+
+ let status = lapi.lua_load(L, getF, lf, lapi.lua_tostring(L, -1), mode);
+ if (filename) fs.closeSync(lf.f); /* close file (even in case of errors) */
+ lapi.lua_remove(L, fnameindex);
+ return status;
+ } catch (err) {
+ lapi.lua_settop(L, fnameindex); /* ignore results from 'lua_load' */
+ return errfile(L, "read", fnameindex);
+ }
+ };
- module.exports.luaL_loadfilex = luaL_loadfilex;
- module.exports.luaL_loadfile = luaL_loadfile;
+ const luaL_loadfile = function(L, filename) {
+ return luaL_loadfilex(L, filename, null);
+ };
+ module.exports.luaL_loadfilex = luaL_loadfilex;
+ module.exports.luaL_loadfile = luaL_loadfile;
+ }
}
module.exports.LUA_LOADED_TABLE = LUA_LOADED_TABLE;
generated by cgit v1.2.3-70-g09d2 (git 2.47.0) at 2024-11-11 02:01:22 +0000