Native INI file parser Code implemented by JavaScript

The native INI file parser Code implemented using JavaScript is reproduced in this article by the Helper's house. below is the author's description:

An INI file parser written in Builder mode, which is implemented in JavaScript. It just expresses the idea of INI File Parsing and the example application of Builder mode. It is easy to implement it in other languages based on your ideas. Commenting on E is just an exercise. Don't be surprised!

Copy to ClipboardReference: [www.bkjia.com]/* trim the blank chars at the ining/end of the string .*/
String. prototype. trim = function (){
Return this. replace (/^ \ s + | \ s + $/g ,'');
};

Function print (e) {WScript. Echo (e );}

Var JSON = {
/*
Encode any give object into a string in JSON format.
*/
Encode: function (obj ){
Var strDump = '';
Var Temp = [];

If (obj = undefined)
{
StrDump = 'undefined ';
}
Else if (obj = null)
{
StrDump = 'null ';
}
Else if (typeof obj) === 'string ')
{
StrDump = '\ ''+ obj + '\'';
}
Else if (typeof obj) === 'number ')
{
StrDump = obj. toString ();
}
Else if (obj instanceof Array)
{
Temp = [];

StrDump = '[';
Var I = 0;
For (; I <obj. length; ++ I)
{
Temp. push (this. encode (obj [I]);
}
StrDump + = Temp. join (',') + ']';
}
Else if (obj instanceof Object)
{
Temp = [];

StrDump = '{';
Var p = null;
For (p in obj)
{
Temp. push (p + ':' + this. encode (obj [p]);
}
StrDump + = Temp. join (',') + '}';
}

Return strDump;
},
Decode: function (strJSON ){
Return eval ('+ strJSON + ')');
}
};

/*
Parse the INI file, get the sections, keys and values.
IniBuilder builds the final result.
*/
Function IniParser ()
{
This. _ iniContent = [];
}

IniParser. prototype. loadIni = function (file ){
Var fso = new ActiveXObject ("Scripting. FileSystemObject ");
Var text = fso. OpenTextFile (file, 1, false );

Var idx = 0;
While (! Text. AtEndOfStream)
{
This. _ iniContent [idx ++] = text. ReadLine ();
}
Text. Close ();
};

/*
Launch the parse process.
*/
IniParser. prototype. doParse = function (iniBuilder ){
If (this. _ iniContent. length = 0)
{
Return;
}

If (iniBuilder === null |
IniBuilder === undefined)
{
Throw new Error ("Bad Builder! ");
}

Var row = 0;
Var line = '';
For (; row <this. _ iniContent. length; ++ row)
{
Line = this. _ iniContent [row]. toString (). trim ();

/* If it's a blank line or a comment, skip it .*/
If (line. length = 0 |
Line. charAt (0) = ';')
{
Continue;
}

Var Temp = [];

/* Whether is a section element .*/
Var foundSection = false;

Var col = 0;
For (; col <line. length; col ++)
{
/* The begining of a section element */
If (line. charAt (col) = '[')
{
FoundSection = true;
Continue;
}

/* The end of a section element */
Else if (foundSection & line. charAt (col) = ']')
{
Break;
}

Temp. push (line. charAt (col ));
}
Var strTemp = Temp. join ('');

/* It can be only section element or key-value pair element .*/
If (foundSection)
{
IniBuilder. onSection (strTemp );
}
Else
{
Var pair = strTemp. split ('= ');
Var key = pair [0]. toString (). trim ();
Var value = pair [1]. toString (). trim ();
IniBuilder. onKeyValue (key, value );
}
}
};

/*
Build the final result of ini according to the given elements (sections keys and values ).
*/
Function IniBuilder ()
{
This. _ result = {};

/* The last section name */
This. _ lastsection = 'default ';
}

/*
Assemble the section elements
*/
IniBuilder. prototype. onSection = function (section ){
If (section = null |
Section = undefined |
Section. toString (). length = 0)
{
Section = 'default ';
}

This. _ result [section] = {};
This. _ lastsection = section. toString ();
};

/*
Assemble the keys and values pairs. Their parent section is the last give one.
If there is none, then use "DEFAULT" as the default.
*/
IniBuilder. prototype. onKeyValue = function (key, value ){
If (key = null | key = undefined)
{
Throw new Error ("Bad Key! ");
}

If (this. _ lastsection. length = 0)
{
This. _ lastsection = 'default ';
}

This. _ result [this. _ lastsection] [key. toString ()] = value;
};

/*
Get the parse result in JSON string format.
*/
IniBuilder. prototype. outJSON = function (){
Return JSON. encode (this. _ result );
};

/*
Get the parse result in XML string format.
*/
IniBuilder. prototype. outXML = function (){
/* TO be implemented */
};


/*
Director for IniParser and IniBuilder.
*/
Function IniDirector (iniParser, iniBuilder)
{
This. _ iniParser = iniParser;
This. _ iniBuilder = iniBuilder;
}

IniDirector. prototype. parseIni = function (file ){
This. _ iniParser. loadIni (file );
This. _ iniParser. doParse (this. _ iniBuilder );
};

IniDirector. prototype. getJSON = function (){
Return this. _ iniBuilder. outJSON ();
};

IniDirector. prototype. getXML = function (){
Return this. _ iniBuilder. outXML ();
};

/* Test code */
(Function (){
Var parser = new IniParser ();
Var builder = new IniBuilder ();
Var director = new IniDirector (parser, builder );
/* Please provide your own INI file .*/
Director. parseIni ('data. ini ');

Print (director. getJSON ());
})();