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authorBenoit Giannangeli <benoit.giannangeli@boursorama.fr>2017-02-16 16:04:03 +0100
committerBenoit Giannangeli <benoit.giannangeli@boursorama.fr>2017-02-16 16:04:44 +0100
commit62cb8279094fd137ce2382fe99592ef0aae0f557 (patch)
tree0ec59ec29c410e20f177e874e0a001ab620e02e2 /src
parentf556eada483134f5dc433e6bd4510047e4953649 (diff)
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lua_call
Diffstat (limited to 'src')
-rw-r--r--src/lapi.js31
-rw-r--r--src/ldo.js46
2 files changed, 70 insertions, 7 deletions
diff --git a/src/lapi.js b/src/lapi.js
index ee976e1..99955a3 100644
--- a/src/lapi.js
+++ b/src/lapi.js
@@ -219,10 +219,33 @@ const lua_typename = function(L, t) {
** 'load' and 'call' functions (run Lua code)
*/
+const lua_callk = function(L, nargs, nresults, ctx, k) {
+ assert(k === null || !(L.ci.callstatus & CIST_LUA), "cannot use continuations inside hooks");
+ assert(nargs + 1 < L.top - L.ci.funcOff, "not enough elements in the stack");
+ assert(L.status === TS.LUA_OK, "cannot do calls on non-normal thread");
+ assert(nargs === lua.LUA_MULTRET || (L.ci.top - L.top >= nargs - nresults, "results from function overflow current stack size"));
+
+ let func = L.top - (nargs + 1);
+ if (k !== null && L.nny === 0) { /* need to prepare continuation? */
+ L.ci.u.c.k = k;
+ L.ci.u.c.ctx = ctx;
+ ldo.luaD_call(L, func, nresults);
+ } else { /* no continuation or no yieldable */
+ ldo.luaD_callnoyield(L, func, nresults);
+ }
+
+ if (nresults == lua.LUA_MULTRET && L.ci.top < L.top)
+ L.ci.top = L.top;
+};
+
+const lua_call = function(L, n, r) {
+ lua_callk(L, n, r, 0, null);
+};
+
const lua_pcallk = function(L, nargs, nresults, errfunc, ctx, k) {
- assert(nargs + 1 < L.top - L.ci.func, "not enough elements in the stack");
+ assert(nargs + 1 < L.top - L.ci.funcOff, "not enough elements in the stack");
assert(L.status === TS.LUA_OK, "cannot do calls on non-normal thread");
- assert(nargs == lua.LUA_MULTRET || (L.ci.top - L.top >= nargs - nresults, "results from function overflow current stack size"));
+ assert(nargs === lua.LUA_MULTRET || (L.ci.top - L.top >= nargs - nresults, "results from function overflow current stack size"));
let c = {
func: null,
@@ -286,4 +309,6 @@ module.exports.lua_tonumber = lua_tonumber;
module.exports.lua_tointeger = lua_tointeger;
module.exports.lua_toboolean = lua_toboolean;
module.exports.lua_tolstring = lua_tolstring;
-module.exports.lua_tostring = lua_tostring; \ No newline at end of file
+module.exports.lua_tostring = lua_tostring;
+module.exports.lua_callk = lua_callk;
+module.exports.lua_call = lua_call; \ No newline at end of file
diff --git a/src/ldo.js b/src/ldo.js
index aa52b76..f965a47 100644
--- a/src/ldo.js
+++ b/src/ldo.js
@@ -1,6 +1,8 @@
/*jshint esversion: 6 */
"use strict";
+const assert = require('assert');
+
const lua = require('./lua.js');
const lobject = require('./lobject.js');
const lstate = require('./lstate.js');
@@ -15,15 +17,51 @@ const TMS = ltm.TMS;
const nil = new TValue(CT.LUA_TNIL, null);
+/*
+** Prepares a function call: checks the stack, creates a new CallInfo
+** entry, fills in the relevant information, calls hook if needed.
+** If function is a JS function, does the call, too. (Otherwise, leave
+** the execution ('luaV_execute') to the caller, to allow stackless
+** calls.) Returns true iff function has been executed (JS function).
+*/
const luaD_precall = function(L, off, nresults) {
let func = L.stack[off];
let ci;
switch(func.type) {
- case CT.LUA_TCCL: // JS function ?
- throw new Error("LUA_TCCL not implemeted yet");
- case CT.LUA_TLCF: // still JS function ?
- throw new Error("LUA_TLCF not implemeted yet");
+ case CT.LUA_TCCL:
+ case CT.LUA_TLCF: {
+ let f = func.type === CT.LUA_TCCL ? func.f : func.value;
+
+ // next_ci
+ if (L.ci.next) {
+ L.ci = L.ci.next;
+ ci = L.ci;
+ } else {
+ ci = new lstate.CallInfo(off);
+ L.ci.next = ci;
+ ci.previous = L.ci;
+ ci.next = null;
+
+ L.ci = ci;
+ L.ciOff++;
+ }
+
+ ci.nresults = nresults;
+ ci.func = func;
+ ci.funcOff = off;
+ ci.top = L.top + lua.LUA_MINSTACK;
+ ci.callstatus = 0;
+ // TODO: hook
+ let n = f(L); /* do the actual call */
+
+ assert(n < L.top - L.ci.funcOff, "not enough elements in the stack");
+
+ luaD_poscall(L, ci, L.top - n, n);
+
+ return true;
+ break;
+ }
case CT.LUA_TLCL: {
let p = func.p;
let n = L.top - off - 1;