From ea562b1094672f641707c0f809827a0d3a982f23 Mon Sep 17 00:00:00 2001
From: Benoit Giannangeli <benoit.giannangeli@boursorama.fr>
Date: Fri, 17 Feb 2017 13:47:33 +0100
Subject: lua_newtable, lua_createtable

---
 README.md     |  4 ++--
 src/lapi.js   | 46 +++++++++++++++++++++++++++++++++-------------
 tests/lapi.js | 38 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 73 insertions(+), 15 deletions(-)

diff --git a/README.md b/README.md
index 6bade18..b86a4b4 100644
--- a/README.md
+++ b/README.md
@@ -48,6 +48,8 @@
     - [x] lua_callk
     - [x] lua_setglobal
     - [x] lua_upvalueindex
+    - [x] lua_createtable
+    - [x] lua_newtable
     - [ ] lua_absindex
     - [ ] lua_arith
     - [ ] lua_checkstack
@@ -55,7 +57,6 @@
     - [ ] lua_compare
     - [ ] lua_concat
     - [ ] lua_copy
-    - [ ] lua_createtable
     - [ ] lua_dump
     - [ ] lua_error
     - [x] lua_gc (unvailable)
@@ -90,7 +91,6 @@
     - [ ] lua_isuserdata
     - [ ] lua_isyieldable
     - [ ] lua_len
-    - [ ] lua_newtable
     - [ ] lua_newthread
     - [ ] lua_newuserdata
     - [ ] lua_next
diff --git a/src/lapi.js b/src/lapi.js
index 6a88f6f..089f138 100644
--- a/src/lapi.js
+++ b/src/lapi.js
@@ -88,27 +88,24 @@ const lua_pop = function(L, n) {
 */
 
 const lua_pushnil = function(L) {
-    L.stack[L.top] = ldo.nil;
+    L.stack[L.top++] = ldo.nil;
 
-    L.top++;
     assert(L.top <= L.ci.top, "stack overflow");
 };
 
 const lua_pushnumber = function(L, n) {
     assert(typeof n === "number");
 
-    L.stack[L.top] = new TValue(CT.LUA_TNUMFLT, n);
+    L.stack[L.top++] = new TValue(CT.LUA_TNUMFLT, n);
 
-    L.top++;
     assert(L.top <= L.ci.top, "stack overflow");
 };
 
 const lua_pushinteger = function(L, n) {
     assert(typeof n === "number");
 
-    L.stack[L.top] = new TValue(CT.LUA_TNUMINT, n|0);
+    L.stack[L.top++] = new TValue(CT.LUA_TNUMINT, n|0);
 
-    L.top++;
     assert(L.top <= L.ci.top, "stack overflow");
 };
 
@@ -117,9 +114,8 @@ const lua_pushlstring = function(L, s, len) { // TODO: embedded \0
     assert(typeof n === "number");
 
     let ts = len === 0 ? new TValue(CT.LUA_TLNGSTR, "") : new TValue(CT.LUA_TLNGSTR, s.substr(0, len));
-    L.stack[L.top] = ts;
+    L.stack[L.top++] = ts;
 
-    L.top++;
     assert(L.top <= L.ci.top, "stack overflow");
 
     return ts.value;
@@ -174,18 +170,16 @@ const lua_pushcfunction = function(L, fn) {
 const lua_pushjsfunction = lua_pushcfunction;
 
 const lua_pushboolean = function(L, b) {
-    L.stack[L.top] = new TValue(CT.LUA_TBOOLEAN, b ? true : false);
+    L.stack[L.top++] = new TValue(CT.LUA_TBOOLEAN, b ? true : false);
 
-    L.top++;
     assert(L.top <= L.ci.top, "stack overflow");
 };
 
 const lua_pushlightuserdata = function(L, p) {
     assert(typeof p === "object");
 
-    L.stack[L.top] = new TValue(CT.LUA_TLIGHTUSERDATA, p);
+    L.stack[L.top++] = new TValue(CT.LUA_TLIGHTUSERDATA, p);
 
-    L.top++;
     assert(L.top <= L.ci.top, "stack overflow");
 };
 
@@ -217,6 +211,26 @@ const lua_setglobal = function(L, name) {
 };
 
 
+/*
+** get functions (Lua -> stack)
+*/
+
+// narray and nrec are mostly useless for this implementation
+const lua_createtable = function(L, narray, nrec) {
+    let t = new lobject.Table();
+    L.stack[L.top++] = t;
+
+    assert(L.top <= L.ci.top, "stack overflow");
+
+    if (narray > 0)
+        t.value.array = new Array(narray);
+};
+
+const lua_newtable = function(L) {
+    lua_createtable(L, 0, 0);
+};
+
+
 /*
 ** access functions (stack -> JS)
 */
@@ -261,6 +275,9 @@ const lua_typename = function(L, t) {
     return ltm.ttypename(t);
 };
 
+const lua_istable = function(L, idx) {
+    return index2addr(L, idx).ttistable();
+};
 
 /*
 ** 'load' and 'call' functions (run Lua code)
@@ -381,4 +398,7 @@ module.exports.lua_load           = lua_load;
 module.exports.lua_callk          = lua_callk;
 module.exports.lua_call           = lua_call;
 module.exports.lua_pop            = lua_pop;
-module.exports.lua_setglobal      = lua_setglobal;
\ No newline at end of file
+module.exports.lua_setglobal      = lua_setglobal;
+module.exports.lua_istable        = lua_istable;
+module.exports.lua_createtable    = lua_createtable;
+module.exports.lua_newtable       = lua_newtable;
\ No newline at end of file
diff --git a/tests/lapi.js b/tests/lapi.js
index 419e5c4..561841f 100644
--- a/tests/lapi.js
+++ b/tests/lapi.js
@@ -438,4 +438,42 @@ test('lua script reads js upvalues', function (t) {
         "hello world",
         "Correct element(s) on the stack"
     );
+});
+
+
+test('lua_createtable', function (t) {
+    let L;
+    
+    t.plan(2);
+
+    t.doesNotThrow(function () {
+        L = lauxlib.luaL_newstate();
+
+        lapi.lua_createtable(L, 3, 3);
+
+    }, "JS Lua program ran without error");
+
+    t.ok(
+        lapi.lua_istable(L, -1),
+        "Correct element(s) on the stack"
+    );
+});
+
+
+test('lua_newtable', function (t) {
+    let L;
+    
+    t.plan(2);
+
+    t.doesNotThrow(function () {
+        L = lauxlib.luaL_newstate();
+
+        lapi.lua_newtable(L);
+
+    }, "JS Lua program ran without error");
+
+    t.ok(
+        lapi.lua_istable(L, -1),
+        "Correct element(s) on the stack"
+    );
 });
\ No newline at end of file
-- 
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