// Shave and a Haircut
// (c) 2019 Epic Games
// US Patent 6720962

//
// Script to create sample/include/shaveSDKFUNCS2.h & shaveSDKCALLBACKS2.h
//
// To execute:  cscript mkSDKincludes.js
//
var fs = WScript.CreateObject("Scripting.FileSystemObject");
var altNamesFile;
var sdkFuncsFile;
var sdkCallbacksFile;

try
{
    altNamesFile = fs.OpenTextFile("shaveSDKALTNAMES.h", 1, false, 0);
}
catch(e)
{
    WScript.Echo("Could not find shaveSDKALTNAMES.h");
    WScript.Quit();
}

try
{
    sdkFuncsFile = fs.OpenTextFile("shaveSDKFUNCS.h", 1, false, 0);
}
catch(e)
{
    WScript.Echo("Could not find shaveSDKFUNCS.h");
    WScript.Quit();
}

try
{
    sdkCallbacksFile = fs.OpenTextFile("shaveSDKCALLBACKS.h", 1, false, 0);
}
catch(e)
{
    WScript.Echo("Could not find shaveSDKCALLBACKS.h");
    WScript.Quit();
}

//
// Find the '#ifdef ALTERNATE_DEFS' line.
//
var line;

while (!altNamesFile.AtEndOfStream)
{
    line = altNamesFile.ReadLine();

    if ((line.indexOf("#ifdef") >= 0) && (line.indexOf("ALTERNATE_DEFS") >= 0))
        break;
}

//
// Store all the name pairs in a pair of arrays.
//
var names = new Array();
var altNames = new Array();

while (!altNamesFile.AtEndOfStream)
{
	line = altNamesFile.ReadLine();

	var	words = line.split(/[ \t]/);

	if (words.length > 0)
	{
		if (words[0] == "#endif") break;

		if ((words[0] == "#define") && (words.length == 3))
		{
			names[names.length] = new RegExp(words[1] + "[ \\t]*\\(");
			altNames[altNames.length] = words[2] + "(";
		}
	}
}

altNamesFile.Close();

//
// Create the shaveSDKFUNCS2.h file in sample\include.
//
var sdkFuncs2File;

try
{
	sdkFuncs2File = fs.CreateTextFile("sample\\include\\shaveSDKFUNCS2.h", true);
}
catch(e)
{
	WScript.Echo("Cannot create sample\\include\\shaveSDKFUNCS2.h.");
}


//
// Step through each line of the original sdkFuncsFile, replacing the func
// names with their alternate names.
//
while (!sdkFuncsFile.AtEndOfStream)
{
	line = sdkFuncsFile.ReadLine();

	//
	// Don't even both trying to do substitutions on blank lines or comment
	// lines.
	//
	if ((line.match(/^[ \t]*$/) == null) && (line.match(/^[ \t]*\/\//) == null))
	{
		for (i = 0; i < names.length; i++)
		{
			line = line.replace(names[i], altNames[i]);
		}
	}

	sdkFuncs2File.WriteLine(line);
}

sdkFuncsFile.Close();
sdkFuncs2File.Close();


//
// Create the shaveSDKCALLBACKS2.h file in sample\include.
//
var sdkCallbacks2File;

try
{
	sdkCallbacks2File = fs.CreateTextFile("sample\\include\\shaveSDKCALLBACKS2.h", true);
}
catch(e)
{
	WScript.Echo("Cannot create sample\\include\\shaveSDKCALLBACKS2.h.");
}


//
// Step through each line of the original sdkCallbacksFile, replacing the func
// names with their alternate names.
//
while (!sdkCallbacksFile.AtEndOfStream)
{
	line = sdkCallbacksFile.ReadLine();

	//
	// Don't even both trying to do substitutions on blank lines or comment
	// lines.
	//
	if ((line.match(/^[ \t]*$/) == null) && (line.match(/^[ \t]*\/\//) == null))
	{
		for (i = 0; i < names.length; i++)
		{
			line = line.replace(names[i], altNames[i]);
		}
	}

	sdkCallbacks2File.WriteLine(line);
}

sdkCallbacksFile.Close();
sdkCallbacks2File.Close();