Script.cpp

/*
 * TinyJS
 *
 * A single-file Javascript-alike engine
 *
 * Authored By Gordon Williams <gw@pur3.co.uk>
 *
 * Copyright (C) 2009 Pur3 Ltd
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
 * of the Software, and to permit persons to whom the Software is furnished to do
 * so, subject to the following conditions:

 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

 /*
  * This is a simple program showing how to use TinyJS
  */

#include "TinyJS.h"
#include "TinyJS_Functions.h"
#include <assert.h>
#include <stdio.h>


  //const char *code = "var a = 5; if (a==5) a=4; else a=3;";
  //const char *code = "{ var a = 4; var b = 1; while (a>0) { b = b * 2; a = a - 1; } var c = 5; }";
  //const char *code = "{ var b = 1; for (var i=0;i<4;i=i+1) b = b * 2; }";
const char *code = "function myfunc(x, y) { return x + y; } var a = myfunc(1,2); print(a);";

void js_print(CScriptVar *v, void *userdata)
{
    printf("> %s\n", v->getParameter("text")->getString().c_str());
}

void js_dump(CScriptVar *v, void *userdata)
{
    CTinyJS *js = (CTinyJS*)userdata;
    js->root->trace(">  ");
}


int main(int argc, char **argv)
{
    CTinyJS *js = new CTinyJS();
    /* add the functions from TinyJS_Functions.cpp */
    registerFunctions(js);
    /* Add a native function */
    js->addNative("function print(text)", &js_print, 0);
    js->addNative("function dump()", &js_dump, js);
    /* Execute out bit of code - we could call 'evaluate' here if
       we wanted something returned */
    try
    {
        js->execute("var lets_quit = 0; function quit() { lets_quit = 1; }");
        js->execute("print(\"Interactive mode... Type quit(); to exit, or print(...); to print something, or dump() to dump the symbol table!\");");
    }
    catch(CScriptException *e)
    {
        printf("ERROR: %s\n", e->text.c_str());
    }

    while(js->evaluate("lets_quit") == "0")
    {
        char buffer[2048];
        fgets(buffer, sizeof(buffer), stdin);
        try
        {
            js->execute(buffer);
        }
        catch(CScriptException *e)
        {
            printf("ERROR: %s\n", e->text.c_str());
        }
    }
    delete js;
#ifdef _WIN32
#ifdef _DEBUG
    _CrtDumpMemoryLeaks();
#endif
#endif
    return 0;
}