Initial import.

1 files changed, 283 insertions, 0 deletions

diff --git a/src/luascript.cc b/src/luascript.cc
new file mode 100644
index 0000000..1699cdf
--- /dev/null
+++ b/src/luascript.cc
@@ -0,0 +1,283 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set et sw=2 ts=2: */
+/***************************************************************************
+ *            luascript.cc
+ *
+ *  Tue Jan 10 14:43:39 CET 2012
+ *  Copyright 2012 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 "luascript.h"
+
+// For atoi
+#include <stdlib.h>
+
+//#include "luautil.h"
+
+#define GLOBAL_POINTER "_pracroGlobalLUAObjectPointerThisShouldBeANameThatIsNotAccidentallyOverwritten"
+
+#define DEBUG(x, fmt...) printf(fmt)
+#define ERR(x, fmt...) printf(fmt)
+
+static int _debug(lua_State *L)
+{/*
+  Pracro::checkParameters(L,
+                          Pracro::T_STRING,
+                          Pracro::T_END);
+ */
+  std::string msg = lua_tostring(L, lua_gettop(L));
+
+  printf("%s\n", msg.c_str());
+
+  return 0;
+}
+
+static int _forward(lua_State *L)
+{/*
+  Pracro::checkParameters(L,
+                          Pracro::T_STRING,
+                          Pracro::T_END);
+ */
+  int x = lua_tonumber(L, lua_gettop(L));
+
+  printf("forward %d\n", x);
+  
+  lua_getglobal(L, GLOBAL_POINTER);
+  LUAScript *lua = (LUAScript*)lua_touserdata(L, lua_gettop(L));
+
+  if(!lua) {
+    lua_pushstring(L, "No LUA pointer!");
+    lua_error(L);
+    return 1;
+  }
+
+  lua->out->forward(x * 5);
+
+  return 0;
+}
+
+static int _turn(lua_State *L)
+{/*
+  Pracro::checkParameters(L,
+                          Pracro::T_STRING,
+                          Pracro::T_END);
+ */
+  int x = lua_tonumber(L, lua_gettop(L));
+
+  printf("turn %d\n", x);
+  
+  lua_getglobal(L, GLOBAL_POINTER);
+  LUAScript *lua = (LUAScript*)lua_touserdata(L, lua_gettop(L));
+
+  if(!lua) {
+    lua_pushstring(L, "No LUA pointer!");
+    lua_error(L);
+    return 1;
+  }
+
+  lua->out->turn(-x);
+
+  return 0;
+}
+
+static int _reset(lua_State *L)
+{/*
+  Pracro::checkParameters(L,
+                          Pracro::T_STRING,
+                          Pracro::T_END);
+ */
+
+  printf("reset\n");
+  
+  lua_getglobal(L, GLOBAL_POINTER);
+  LUAScript *lua = (LUAScript*)lua_touserdata(L, lua_gettop(L));
+
+  if(!lua) {
+    lua_pushstring(L, "No LUA pointer!");
+    lua_error(L);
+    return 1;
+  }
+
+  lua->out->reset();
+
+  return 0;
+}
+
+LUAScript::LUAScript(OutputWindow *o)
+{
+  DEBUG(luascript, "LUAScript()\n");
+  L = NULL;
+  out = o;
+}
+
+LUAScript::~LUAScript()
+{
+  if(L) {
+    free(L);
+    L = NULL;
+  }
+  DEBUG(luascript, "~LUAScript()\n");
+}
+
+void LUAScript::init()
+  throw(Exception)
+{
+  if(L) return;
+
+  L = luaL_newstate();
+  if(L == NULL) {
+    ERR(luascript, "Could not create LUA state.\n");
+    throw Exception("Could not create LUA state.");
+  }
+
+  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, "debug", _debug);
+  lua_register(L, "fremad", _forward);
+  lua_register(L, "drej", _turn);
+  lua_register(L, "reset", _reset);
+
+  connect(&watcher, SIGNAL(fileChanged(const QString &)),
+          this, SLOT(reload()));
+}
+
+void LUAScript::addFile(std::string src)
+{
+  file = src.c_str();
+  FILE *fp = fopen(src.c_str(), "r");
+  if(fp) {
+    char buf[64];
+    size_t sz;
+    std::string inc;
+    while((sz = fread(buf, 1, sizeof(buf), fp)) != 0) {
+      inc.append(buf, sz);
+    }
+    fclose(fp);
+    addCode(inc, src);
+  }
+
+  watcher.addPath(file);
+}
+
+void LUAScript::reload()
+{
+  printf("Reload\n");
+  //  luaL_error(L, "Terminated due to reload.");
+  //  runScript();
+}
+
+void LUAScript::addCode(std::string c, std::string name)
+{
+  scripts.push_back(std::make_pair(c, name));
+}
+
+void LUAScript::run()
+{
+  /*
+  while(true) {
+    printf("."); fflush(stdout);
+  }
+  */
+  try {
+    runScript();
+  } catch(Exception &e) {
+    printf("LUA Error: %s\n", e.msg.c_str());
+  }
+}
+
+void LUAScript::runScript()
+  throw(Exception)
+{
+  try {
+    init();
+  } catch(Exception &e) {
+    throw Exception(e.msg);
+  }
+
+  if(L == NULL) {
+    ERR(luascript, "LUA state not initialized!");
+    return;
+  }
+
+  top = lua_gettop(L);
+
+  std::vector<std::pair<std::string, std::string> >::iterator i =
+    scripts.begin();
+  while(i != scripts.end()) {
+    std::string program = i->first;
+    std::string codename = name();
+    if(i->second != "") codename += ": " + i->second;
+
+    DEBUG(luascript, "Running %s: %s\n", codename.c_str(), program.c_str());
+
+    if(luaL_loadbuffer(L, program.c_str(), program.size(), codename.c_str())) {
+      ERR(luascript, "loadbuffer: %s\n", lua_tostring(L, lua_gettop(L)));
+      throw Exception(lua_tostring(L, lua_gettop(L)));
+    }
+    
+    // Run the loaded code
+    if(lua_pcall(L, 0, LUA_MULTRET, 0)) {
+      ERR(luascript, "pcall: %s\n" , lua_tostring(L, lua_gettop(L)));
+      throw Exception(lua_tostring(L, lua_gettop(L)));
+    }
+
+    i++;
+  }
+}
+
+std::string LUAScript::resultString() throw(Exception)
+{
+  if(top != lua_gettop(L) - 1) {
+    ERR(luascript, "Program did not return a single value.\n");
+    throw Exception("Program did not return a single value.");
+  }
+
+  if(lua_isstring(L, lua_gettop(L)) == false) {
+    ERR(luascript, "Program did not return a string value.\n");
+    throw Exception("Program did not return a string value.");
+  }
+
+  std::string res = lua_tostring(L, lua_gettop(L));
+  lua_pop(L, 1);
+
+  return res;
+}
+
+#ifdef TEST_LUASCRIPT
+//Additional dependency files
+//deps:
+//Required cflags (autoconf vars may be used)
+//cflags:
+//Required link options (autoconf vars may be used)
+//libs:
+#include "test.h"
+
+TEST_BEGIN;
+
+// TODO: Put some testcode here (see test.h for usable macros).
+TEST_TRUE(false, "No tests yet!");
+
+TEST_END;
+
+#endif/*TEST_LUASCRIPT*/