From f2710089a722fc55970813fab2d27ae3e23a9c97 Mon Sep 17 00:00:00 2001
From: deva <deva>
Date: Tue, 13 Jan 2009 10:01:52 +0000
Subject: Added a 'language' tag in resume, to be able to switch parser.
 Implemented the lua resume parser.

---
 server/src/luaresume.cc | 142 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 142 insertions(+)
 create mode 100644 server/src/luaresume.cc

(limited to 'server/src/luaresume.cc')

diff --git a/server/src/luaresume.cc b/server/src/luaresume.cc
new file mode 100644
index 0000000..ce6df98
--- /dev/null
+++ b/server/src/luaresume.cc
@@ -0,0 +1,142 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ *            lua.cc
+ *
+ *  Thu May 29 16:30:50 CEST 2008
+ *  Copyright 2008 Bent Bisballe Nyeng
+ *  deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ *  This file is part of Pracro.
+ *
+ *  Pracro is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  Pracro is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with Pracro; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#include "luaresume.h"
+
+#include <stdio.h>
+
+#define GLOBAL_POINTER "_pracroGlobalLUAObjectPointerThisShouldBeANameThatIsNotAccidentallyOverwritten"
+
+static int _getValue(lua_State *L)
+{
+  int n = lua_gettop(L); // number of arguments
+  if(n != 1) {
+    char errstr[512];
+    sprintf(errstr, "Number of args expected 0, got %d", n);
+    lua_pushstring(L, errstr);
+    lua_error(L);
+    return 1;
+  }
+
+  std::string name = lua_tostring(L, lua_gettop(L));
+
+  lua_getglobal(L, GLOBAL_POINTER);
+  LUAResume *lua = (LUAResume*)lua_touserdata(L, lua_gettop(L));
+
+  if(!lua) {
+    lua_pushstring(L, "No LUA pointer!");
+    lua_error(L);
+    return 1;
+  }
+
+  std::string value = lua->getValue(name);
+  lua_pushstring(L, value.c_str());
+
+  return 1;
+}
+
+LUAResume::LUAResume(Commit &c)
+  : commit(c)
+{
+  L = luaL_newstate();
+  if(L == NULL) {
+    error("Could not create LUA state.");
+    return;
+  }
+
+  luaL_openlibs(L);               
+
+  lua_pushlightuserdata(L, this); // Push the pointer to 'this' instance
+  lua_setglobal(L, GLOBAL_POINTER); // Assign it to a global lua var.
+
+  lua_register(L, "getValue", _getValue);
+}
+
+LUAResume::~LUAResume()
+{
+  lua_close(L);
+}
+
+std::string LUAResume::getValue(std::string name)
+{
+  if(commit.fields.find(name) == commit.fields.end()) {
+    error("LUAResume: No such field '" + name + "'");
+    return "";
+  }
+
+  return commit.fields[name];
+}
+
+std::string LUAResume::run(std::string program)
+{
+  if(L == NULL) {
+    error("LUA state not initialized!");
+    return false;
+  }
+
+  printf("Running %s\n", program.c_str());
+
+  /*
+  lua_pushstring(L, value.toStdString().c_str());
+  lua_setglobal(L, "value");
+
+  lua_pushstring(L, name.toStdString().c_str());
+  lua_setglobal(L, "name");
+  */
+
+  int top = lua_gettop(L);
+
+  if(luaL_loadbuffer(L, program.c_str(), program.size(), "lua resume generator")) {
+    error(lua_tostring(L, lua_gettop(L)));
+    return false;
+  }
+
+  // Run the loaded code
+  if(lua_pcall(L, 0, LUA_MULTRET, 0)) {
+    error(lua_tostring(L, lua_gettop(L)));
+    return false;
+  }
+
+  if(top != lua_gettop(L) - 1) {
+    error("Program did not return a single value.\n");
+    return false;
+  }
+
+  if(lua_isstring(L, lua_gettop(L)) == false) {
+    error("Program did not return a string value.\n");
+    return false;
+  }
+
+  std::string res = lua_tostring(L, lua_gettop(L));
+  lua_pop(L, 1);
+
+  return res;
+}
+
+void LUAResume::error(std::string message)
+{
+  printf("LUA ERROR: %s\n", message.c_str());
+}
-- 
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