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-rw-r--r--src/lfunc.js18
-rw-r--r--src/ljstype.js13
-rw-r--r--src/llex.js133
-rw-r--r--src/lparser.js15
-rw-r--r--tests/llex.js50
5 files changed, 148 insertions, 81 deletions
diff --git a/src/lfunc.js b/src/lfunc.js
index 3b3c8ce..fde910b 100644
--- a/src/lfunc.js
+++ b/src/lfunc.js
@@ -1,6 +1,8 @@
/*jshint esversion: 6 */
"use strict";
-const assert = require('assert');
+const assert = require('assert');
+
+const lobject = require('./lobject.js');
class Proto {
@@ -53,6 +55,15 @@ class UpVal {
}
+const luaF_newLclosure = function(L, n) {
+ let c = new lobject.LClosure();
+ c.p = null;
+ c.nupvalues = n;
+ while (n--) c.upvals[n] = null;
+ return c;
+};
+
+
const findupval = function(L, level) {
let pp = L.openupval;
@@ -116,10 +127,11 @@ const luaF_getlocalname = function(f, local_number, pc) {
}
+module.exports.MAXUPVAL = 255;
module.exports.Proto = Proto;
module.exports.UpVal = UpVal;
module.exports.findupval = findupval;
module.exports.luaF_close = luaF_close;
-module.exports.MAXUPVAL = 255;
+module.exports.luaF_getlocalname = luaF_getlocalname
module.exports.luaF_initupvals = luaF_initupvals;
-module.exports.luaF_getlocalname = luaF_getlocalname \ No newline at end of file
+module.exports.luaF_newLclosure = luaF_newLclosure; \ No newline at end of file
diff --git a/src/ljstype.js b/src/ljstype.js
index 52ac153..192db6f 100644
--- a/src/ljstype.js
+++ b/src/ljstype.js
@@ -5,6 +5,7 @@ const assert = require('assert');
const lisdigit = function(c) {
return /^\d$/.test(c.charAt(0));
+};
const lisxdigit = function(c) {
return /^[0-9a-fA-F]$/.test(c.charAt(0));
@@ -18,12 +19,12 @@ const lislalpha = function(c) {
return /^[_a-zA-z]$/.test(c.charAt(0));
};
-const lislanum = function(c) {
+const lislalnum = function(c) {
return /^[_a-zA-z0-9]$/.test(c.charAt(0));
};
-module.exports.lisdigit = lisdigit;
-module.exports.lislalpha = lislalpha;
-module.exports.lislanum = lislanum;
-module.exports.lisspace = lisspace;
-module.exports.lisxdigit = lisxdigit; \ No newline at end of file
+module.exports.lisdigit = lisdigit;
+module.exports.lislalnum = lislalnum;
+module.exports.lislalpha = lislalpha;
+module.exports.lisspace = lisspace;
+module.exports.lisxdigit = lisxdigit; \ No newline at end of file
diff --git a/src/llex.js b/src/llex.js
index 4c85f65..1adac0a 100644
--- a/src/llex.js
+++ b/src/llex.js
@@ -4,11 +4,12 @@
const assert = require('assert');
const lapi = require('./lapi.js');
+const lauxlib = require('./lauxlib.js');
const ldebug = require('./ldebug.js');
const ldo = require('./ldo.js');
-const lua = require('./lua.js');
-const lobject = require('./lobject');
const ljstype = require('./ljstype');
+const lobject = require('./lobject');
+const lua = require('./lua.js');
const TValue = lobject.TValue;
const CT = lua.constant_types;
const TS = lua.thread_status;
@@ -24,73 +25,41 @@ const RESERVED = {
TK_ELSEIF: FIRST_RESERVED + 4,
TK_END: FIRST_RESERVED + 5,
TK_FALSE: FIRST_RESERVED + 6,
- TK_FOR: FIRST_RESERVED + 8,
- TK_FUNCTION: FIRST_RESERVED + 10,
- TK_GOTO: FIRST_RESERVED + 11,
- TK_IF: FIRST_RESERVED + 12,
- TK_IN: FIRST_RESERVED + 13,
- TK_LOCAL: FIRST_RESERVED + 14,
- TK_NIL: FIRST_RESERVED + 15,
- TK_NOT: FIRST_RESERVED + 16,
- TK_OR: FIRST_RESERVED + 17,
- TK_REPEAT: FIRST_RESERVED + 18,
- TK_RETURN: FIRST_RESERVED + 19,
- TK_THEN: FIRST_RESERVED + 20,
- TK_TRUE: FIRST_RESERVED + 21,
- TK_UNTIL: FIRST_RESERVED + 22,
- TK_WHILE: FIRST_RESERVED + 23,
+ TK_FOR: FIRST_RESERVED + 7,
+ TK_FUNCTION: FIRST_RESERVED + 8,
+ TK_GOTO: FIRST_RESERVED + 9,
+ TK_IF: FIRST_RESERVED + 10,
+ TK_IN: FIRST_RESERVED + 11,
+ TK_LOCAL: FIRST_RESERVED + 12,
+ TK_NIL: FIRST_RESERVED + 13,
+ TK_NOT: FIRST_RESERVED + 14,
+ TK_OR: FIRST_RESERVED + 15,
+ TK_REPEAT: FIRST_RESERVED + 16,
+ TK_RETURN: FIRST_RESERVED + 17,
+ TK_THEN: FIRST_RESERVED + 18,
+ TK_TRUE: FIRST_RESERVED + 19,
+ TK_UNTIL: FIRST_RESERVED + 20,
+ TK_WHILE: FIRST_RESERVED + 21,
/* other terminal symbols */
- TK_IDIV: FIRST_RESERVED + 24,
- TK_CONCAT: FIRST_RESERVED + 25,
- TK_DOTS: FIRST_RESERVED + 26,
- TK_EQ: FIRST_RESERVED + 27,
- TK_GE: FIRST_RESERVED + 28,
- TK_LE: FIRST_RESERVED + 29,
- TK_NE: FIRST_RESERVED + 30,
- TK_SHL: FIRST_RESERVED + 31,
- TK_SHR: FIRST_RESERVED + 32,
- TK_DBCOLON: FIRST_RESERVED + 33,
- TK_EOS: FIRST_RESERVED + 34,
- TK_FLT: FIRST_RESERVED + 35,
- TK_INT: FIRST_RESERVED + 36,
- TK_NAME: FIRST_RESERVED + 37,
- TK_STRING: FIRST_RESERVED + 38
+ TK_IDIV: FIRST_RESERVED + 22,
+ TK_CONCAT: FIRST_RESERVED + 23,
+ TK_DOTS: FIRST_RESERVED + 24,
+ TK_EQ: FIRST_RESERVED + 25,
+ TK_GE: FIRST_RESERVED + 26,
+ TK_LE: FIRST_RESERVED + 27,
+ TK_NE: FIRST_RESERVED + 28,
+ TK_SHL: FIRST_RESERVED + 29,
+ TK_SHR: FIRST_RESERVED + 30,
+ TK_DBCOLON: FIRST_RESERVED + 31,
+ TK_EOS: FIRST_RESERVED + 32,
+ TK_FLT: FIRST_RESERVED + 33,
+ TK_INT: FIRST_RESERVED + 34,
+ TK_NAME: FIRST_RESERVED + 35,
+ TK_STRING: FIRST_RESERVED + 36
};
const R = RESERVED;
-const reserved_keywords = [
- "and", "break", "do", "else", "elseif",
- "end", "false", "for", "function", "goto", "if",
- "in", "local", "nil", "not", "or", "repeat",
- "return", "then", "true", "until", "while"
-];
-
-const reserved_keywords_tokens = [
- R.TK_AND,
- R.TK_BREAK,
- R.TK_DO,
- R.TK_ELSE,
- R.TK_ELSEIF,
- R.TK_END,
- R.TK_FALSE,
- R.TK_FOR,
- R.TK_FUNCTION,
- R.TK_GOTO,
- R.TK_IF,
- R.TK_IN,
- R.TK_LOCAL,
- R.TK_NIL,
- R.TK_NOT,
- R.TK_OR,
- R.TK_REPEAT,
- R.TK_RETURN,
- R.TK_THEN,
- R.TK_TRUE,
- R.TK_UNTIL,
- R.TK_WHILE,
-];
-
const luaX_tokens = [
"and", "break", "do", "else", "elseif",
"end", "false", "for", "function", "goto", "if",
@@ -103,7 +72,7 @@ const luaX_tokens = [
const NUM_RESERVED = Object.keys(RESERVED).length;
-class Buffer {
+class MBuffer {
constructor(string) {
this.buffer = string ? string.split('') : [];
this.n = this.buffer.length;
@@ -137,8 +106,8 @@ class LexState {
this.lookahead = null; /* look ahead token */
this.fs = null; /* current function (parser) */
this.L = null;
- this.z = new Buffer();
- this.buff = new Buffer(); /* buffer for tokens */
+ this.z = new MBuffer();
+ this.buff = new MBuffer(); /* buffer for tokens */
this.h = null; /* to avoid collection/reuse strings */
this.dyd = null; /* dynamic structures used by the parser */
this.source = null; /* current source name */
@@ -195,10 +164,24 @@ const inclinenumber = function(ls) {
};
const luaX_setinput = function(L, ls, z, source, firstchar) {
- ls.t.token = 0;
+ ls.t = {
+ token: 0,
+ seminfo: {
+ i: NaN,
+ r: NaN,
+ ts: null
+ }
+ };
ls.L = L;
ls.current = firstchar;
- ls.lookahead.token = R.TK_EOS;
+ ls.lookahead = {
+ token: R.TK_EOS,
+ seminfo: {
+ i: NaN,
+ r: NaN,
+ ts: null
+ }
+ };
ls.z = z;
ls.fs = null;
ls.linenumber = 1;
@@ -562,8 +545,9 @@ const llex = function(ls, seminfo) {
let ts = new TValue(CT.LUA_TLNGSTR, ls.buff.buffer.join(''));
seminfo.ts = ts;
- if (reserved_keywords.indexOf(ts.value) >= 0) /* reserved word? */
- return reserved_keywords_tokens[reserved_keywords.indexOf(ts.value)];
+ let kidx = luaX_tokens.slice(0, 22).indexOf(ts.value)
+ if (kidx >= 0) /* reserved word? */
+ return kidx + FIRST_RESERVED;
else
return R.TK_NAME;
} else { /* single-char tokens (+ - / ...) */
@@ -591,6 +575,11 @@ const luaX_lookahead = function(ls) {
return ls.lookahead.token;
};
+module.exports.FIRST_RESERVED = FIRST_RESERVED;
+module.exports.LexState = LexState;
module.exports.luaX_lookahead = luaX_lookahead;
module.exports.luaX_next = luaX_next;
-module.exports.luaX_setinput = luaX_setinput; \ No newline at end of file
+module.exports.luaX_setinput = luaX_setinput;
+module.exports.MBuffer = MBuffer;
+module.exports.RESERVED = RESERVED;
+module.exports.luaX_tokens = luaX_tokens; \ No newline at end of file
diff --git a/src/lparser.js b/src/lparser.js
new file mode 100644
index 0000000..a82548c
--- /dev/null
+++ b/src/lparser.js
@@ -0,0 +1,15 @@
+/* jshint esversion: 6 */
+"use strict";
+
+const assert = require('assert');
+
+const llex = require('./llex.js');
+const lfunc = require('./lfunc.js');
+
+
+const luaY_parser = function(L, z, buff, dyd, name, firstchar) {
+ // TODO ...
+};
+
+
+module.exports.luaY_parser = luaY_parser; \ No newline at end of file
diff --git a/tests/llex.js b/tests/llex.js
new file mode 100644
index 0000000..3c05366
--- /dev/null
+++ b/tests/llex.js
@@ -0,0 +1,50 @@
+/*jshint esversion: 6 */
+"use strict";
+
+const test = require('tape');
+const beautify = require('js-beautify').js_beautify;
+
+const tests = require("./tests.js");
+
+const lapi = require("../src/lapi.js");
+const lauxlib = require("../src/lauxlib.js");
+const llex = require("../src/llex.js");
+const lua = require('../src/lua.js');
+const R = llex.RESERVED;
+
+
+test('basic lexing', function (t) {
+ let luaCode = `
+ return "hello lex !"
+ `, L;
+
+ t.plan(2);
+
+ let readTokens = [];
+
+ t.doesNotThrow(function () {
+
+ L = lauxlib.luaL_newstate();
+
+ let ls = new llex.LexState();
+ llex.luaX_setinput(L, ls, new llex.MBuffer(luaCode), luaCode, luaCode.charAt(0));
+
+ llex.luaX_next(ls);
+
+ while (ls.t.token !== R.TK_EOS) {
+ console.log(llex.luaX_tokens[ls.t.token - llex.FIRST_RESERVED]);
+
+ readTokens.push(ls.t.token);
+ llex.luaX_next(ls);
+ }
+
+
+ }, "JS Lua program ran without error");
+
+ t.deepEqual(
+ readTokens,
+ [R.TK_RETURN, R.TK_STRING],
+ "Correct tokens found"
+ )
+
+}); \ No newline at end of file
generated by cgit v1.2.3-54-g00ecf (git 2.45.1) at 2024-06-26 19:53:18 +0000