/*
	Launch4j (http://launch4j.sourceforge.net/)
	Cross-platform Java application wrapper for creating Windows native executables.

	Copyright (c) 2004, 2019 Grzegorz Kowal,
							 Ian Roberts (jdk preference patch)
							 Sylvain Mina (single instance patch)

	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.

	Except as contained in this notice, the name(s) of the above copyright holders
	shall not be used in advertising or otherwise to promote the sale, use or other
	dealings in this Software without prior written authorization.

	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.
*/

#include "resource.h"
#include "head.h"

HMODULE hModule;
FILE* hLog;
BOOL debugAll = FALSE;
BOOL console = FALSE;
BOOL wow64 = FALSE;
BOOL jniHeader = FALSE;
char oldPwd[_MAX_PATH];

PROCESS_INFORMATION processInformation;
DWORD processPriority;

struct
{
	char title[STR];
	char msg[BIG_STR];
	char url[256];
} error;

struct
{
	int foundJava;
	BOOL requiresJdk;
	BOOL requires64Bit;
	BOOL corruptedJreFound;
	char originalJavaMinVer[STR];
	char originalJavaMaxVer[STR];
	char javaMinVer[STR];
	char javaMaxVer[STR];
	char foundJavaVer[STR];
	char foundJavaHome[_MAX_PATH];
} search;

struct
{
	char mainClass[_MAX_PATH];
	char cmd[_MAX_PATH];
	char args[MAX_ARGS];
} launcher;

BOOL initGlobals(BOOL jni)
{
	jniHeader = jni;
	hModule = GetModuleHandle(NULL);

	if (hModule == NULL)
	{
		return FALSE;
	}

	strcpy(error.title, LAUNCH4j);

	search.foundJava = JAVA_NOT_FOUND;
	search.requiresJdk = FALSE;
	search.requires64Bit = FALSE;
	search.corruptedJreFound = FALSE;
	
	return TRUE;
}

FILE* openLogFile(const char* exePath, const int pathLen)
{
	char path[_MAX_PATH] = {0};
	strncpy(path, exePath, pathLen);
	strcat(path, "\\launch4j.log");
	return fopen(path, "a");
}

void closeLogFile()
{
	if (hLog != NULL)
	{
		fclose(hLog);	
	}
}

BOOL initializeLogging(const char *lpCmdLine, const char* exePath, const int pathLen)
{
	char varValue[MAX_VAR_SIZE] = {0};
	GetEnvironmentVariable(LAUNCH4j, varValue, MAX_VAR_SIZE);

    if (strstr(lpCmdLine, "--l4j-debug") != NULL
			|| strstr(varValue, "debug") != NULL)
	{
		hLog = openLogFile(exePath, pathLen);

		if (hLog == NULL)
		{
			return FALSE;
		}

		debugAll = strstr(lpCmdLine, "--l4j-debug-all") != NULL
				|| strstr(varValue, "debug-all") != NULL;
	}
	
	debug("\n\nVersion:\t%s\n", VERSION);
	debug("CmdLine:\t%s %s\n", exePath, lpCmdLine);

	return TRUE;
}

void setWow64Flag()
{
	LPFN_ISWOW64PROCESS fnIsWow64Process = (LPFN_ISWOW64PROCESS)GetProcAddress(
			GetModuleHandle(TEXT("kernel32")), "IsWow64Process");

	if (fnIsWow64Process != NULL)
	{
		fnIsWow64Process(GetCurrentProcess(), &wow64);
	}

	debug("WOW64:\t\t%s\n", wow64 ? "Yes" : "No"); 
}

void setConsoleFlag()
{
     console = TRUE;
}

void msgBox(const char* text)
{
    if (console)
	{
        if (*error.title)
        {
            printf("%s: %s\n", error.title, text);
        }
        else
        {
            printf("%s\n", text);
        }
    }
	else
	{
    	MessageBox(NULL, text, error.title, MB_OK);
    }
}

void signalError()
{
	DWORD err = GetLastError();
	debug("Error msg:\t%s\n", error.msg);

	if (err)
	{
		LPVOID lpMsgBuf;
		FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER
						| FORMAT_MESSAGE_FROM_SYSTEM
						| FORMAT_MESSAGE_IGNORE_INSERTS,
				NULL,
				err,
				MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
			    (LPTSTR) &lpMsgBuf,
			    0,
			    NULL);
		debug(ERROR_FORMAT, (LPCTSTR) lpMsgBuf);
		strcat(error.msg, "\n\n");
		strcat(error.msg, (LPCTSTR) lpMsgBuf);
		LocalFree(lpMsgBuf);
	}
	
	msgBox(error.msg);

	if (*error.url)
	{
		debug("Open URL:\t%s\n", error.url);
		ShellExecute(NULL, "open", error.url, NULL, NULL, SW_SHOWNORMAL);
	}

	closeLogFile();
}

BOOL loadString(const int resID, char* buffer)
{
	HRSRC hResource;
	HGLOBAL hResourceLoaded;
	LPBYTE lpBuffer;
	debugAll("Resource %d:\t", resID);

	hResource = FindResourceEx(hModule, RT_RCDATA, MAKEINTRESOURCE(resID),
			MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT));
	if (NULL != hResource)
	{
		hResourceLoaded = LoadResource(hModule, hResource);
		if (NULL != hResourceLoaded)
		{
			lpBuffer = (LPBYTE) LockResource(hResourceLoaded);            
			if (NULL != lpBuffer)
			{     
				int x = 0;
				do
				{
					buffer[x] = (char) lpBuffer[x];
				} while (buffer[x++] != 0);
				
				debugAll("%s\n", buffer);
				return TRUE;
			}
		}    
	}
	else
	{
		SetLastError(0);
		buffer[0] = 0;
	}
	
	debugAll("<NULL>\n");
	return FALSE;
}

BOOL loadBool(const int resID)
{
	char boolStr[20] = {0};
	loadString(resID, boolStr);
	return strcmp(boolStr, TRUE_STR) == 0;
}

int loadInt(const int resID)
{
	char intStr[20] = {0};
	loadString(resID, intStr);
	return atoi(intStr);
}

BOOL regQueryValue(const char* regPath, unsigned char* buffer,
		unsigned long bufferLength)
{
	HKEY hRootKey;
	char* key;
	char* value;

	if (strstr(regPath, HKEY_CLASSES_ROOT_STR) == regPath)
	{
		hRootKey = HKEY_CLASSES_ROOT;
	}
	else if (strstr(regPath, HKEY_CURRENT_USER_STR) == regPath)
	{
		hRootKey = HKEY_CURRENT_USER;
	}
	else if (strstr(regPath, HKEY_LOCAL_MACHINE_STR) == regPath)
	{
		hRootKey = HKEY_LOCAL_MACHINE;
	}
	else if (strstr(regPath, HKEY_USERS_STR) == regPath)
	{
		hRootKey = HKEY_USERS;
	}
	else if (strstr(regPath, HKEY_CURRENT_CONFIG_STR) == regPath)
	{
		hRootKey = HKEY_CURRENT_CONFIG;
	}
	else
	{
		return FALSE;
	}

	key = strchr(regPath, '\\') + 1;
	value = strrchr(regPath, '\\') + 1;
	*(value - 1) = 0;

	HKEY hKey;
	unsigned long datatype;
	BOOL result = FALSE;
	if ((wow64 && RegOpenKeyEx(hRootKey,
								key,
								0,
	        					KEY_READ | KEY_WOW64_64KEY,
								&hKey) == ERROR_SUCCESS)
			|| RegOpenKeyEx(hRootKey,
								key,
								0,
	        					KEY_READ,
								&hKey) == ERROR_SUCCESS)
	{
		result = RegQueryValueEx(hKey, value, NULL, &datatype, buffer, &bufferLength)
				== ERROR_SUCCESS;
		RegCloseKey(hKey);
	}
	*(value - 1) = '\\';
	return result;
}

int findNextVersionPart(const char* startAt)
{
	if (startAt == NULL || strlen(startAt) == 0)
    {
		return 0;
	}

	char* firstSeparatorA = strchr(startAt, '.');
	char* firstSeparatorB = strchr(startAt, '_');
	char* firstSeparator;
	if (firstSeparatorA == NULL)
    {
		firstSeparator = firstSeparatorB;
	}
    else if (firstSeparatorB == NULL)
    {
		firstSeparator = firstSeparatorA;
	}
    else
    {
		firstSeparator = min(firstSeparatorA, firstSeparatorB);
	}

	if (firstSeparator == NULL)
    {
		return strlen(startAt);
	}

	return firstSeparator - startAt;
}

/**
 * This method will take java version from `originalVersion` string and convert/format it
 * into `version` string that can be used for string comparison with other versions.
 *
 * Due to different version schemas <=8 vs. >=9 it will "normalize" versions to 1 format
 * so we can directly compare old and new versions.
 */
void formatJavaVersion(char* version, const char* originalVersion)
{
	strcpy(version, "");
	if (originalVersion == NULL || strlen(originalVersion) == 0)
    {
		return;
	}

	int partsAdded = 0;
	int i;
	char* pos = (char*) originalVersion;
	int curPartLen;

	while ((curPartLen = findNextVersionPart(pos)) > 0)
    {
		char number[curPartLen + 1];
		memset(number, 0, curPartLen + 1);
		strncpy(number, pos, curPartLen);

		if (partsAdded == 0 && (curPartLen != 1 || number[0] != '1'))
        {
			// NOTE: When it's java 9+ we'll add "1" as the first part of the version
			strcpy(version, "1");
			partsAdded++;
		}

		if (partsAdded < 3)
        {
			if (partsAdded > 0)
            {
				strcat(version, ".");
			}
			for (i = 0;
					(partsAdded > 0)
							&& (i < JRE_VER_MAX_DIGITS_PER_PART - strlen(number));
					i++)
            {
				strcat(version, "0");
			}
			strcat(version, number);
		}
        else if (partsAdded == 3)
        {
			// add as an update
			strcat(version, "_");
			for (i = 0; i < JRE_VER_MAX_DIGITS_PER_PART - strlen(number); i++)
            {
				strcat(version, "0");
			}
			strcat(version, number);
		}
        else if (partsAdded >= 4)
        {
			debug("Warning:\tformatJavaVersion() too many parts added.\n");
			break;
		}
		partsAdded++;

		pos += curPartLen + 1;
		if (pos >= originalVersion + strlen(originalVersion))
        {
			break;
		}
	}

	for (i = partsAdded; i < 3; i++)
    {
		strcat(version, ".");
		int j;
		for (j = 0; j < JRE_VER_MAX_DIGITS_PER_PART; j++)
        {
			strcat(version, "0");
		}
	}
}

void regSearch(const char* keyName, const int searchType)
{
	HKEY hKey;
	const DWORD wow64KeyMask = searchType & KEY_WOW64_64KEY;

	debug("%s-bit search:\t%s...\n", wow64KeyMask ? "64" : "32", keyName);

	if (!RegOpenKeyEx(HKEY_LOCAL_MACHINE,
			keyName,
			0,
	        KEY_READ | wow64KeyMask,
			&hKey) == ERROR_SUCCESS)
	{
		return;
	}

	DWORD x = 0;
	unsigned long versionSize = _MAX_PATH;
	FILETIME time;
	char fullKeyName[_MAX_PATH] = {0};
	char originalVersion[_MAX_PATH] = {0};
	char version[_MAX_PATH] = {0};

	while (RegEnumKeyEx(
				hKey,			// handle to key to enumerate
				x++,			// index of subkey to enumerate
				originalVersion,// address of buffer for subkey name
				&versionSize,	// address for size of subkey buffer
				NULL,			// reserved
				NULL,			// address of buffer for class string
				NULL,			// address for size of class buffer
				&time) == ERROR_SUCCESS)
	{
		strcpy(fullKeyName, keyName);
		appendPath(fullKeyName, originalVersion);
		debug("Check:\t\t%s\n", fullKeyName);
        formatJavaVersion(version, originalVersion);

		if (isJavaVersionGood(version, wow64KeyMask)
				&& isRegistryJavaHomeValid(fullKeyName, searchType))
		{
			strcpy(search.foundJavaVer, version);
			search.foundJava = searchType;
			debug("Match:\t\t%s\n", version);
			break;
		}

		debug("Ignore:\t\t%s\n", version);
		versionSize = _MAX_PATH;
	}

	RegCloseKey(hKey);
}

BOOL isRegistryJavaHomeValid(const char* keyName, const int searchType)
{
	BOOL valid = FALSE;
	HKEY hKey;
	char path[_MAX_PATH] = {0};

	if (RegOpenKeyEx(HKEY_LOCAL_MACHINE,
			keyName,
			0,
            KEY_READ | (searchType & KEY_WOW64_64KEY),
			&hKey) == ERROR_SUCCESS)
	{
		unsigned char buffer[_MAX_PATH] = {0};
		unsigned long bufferlength = _MAX_PATH;
		unsigned long datatype;

		if (RegQueryValueEx(hKey, "JavaHome", NULL, &datatype, buffer,
				&bufferlength) == ERROR_SUCCESS)
		{
			int i = 0;
			do
			{
				path[i] = buffer[i];
			} while (path[i++] != 0);
			
			valid = isLauncherPathValid(path);
		}
		RegCloseKey(hKey);
	}

	if (valid)
	{
		strcpy(search.foundJavaHome, path);
	}
	else
	{
		search.corruptedJreFound = TRUE;
	}

	return valid;
}

BOOL isLauncherPathValid(const char* path)
{
	struct _stat statBuf;
	char launcherPath[_MAX_PATH] = {0};
	char javacPath[_MAX_PATH] = {0};
	BOOL result = FALSE;

	if (*path)
	{
		strcpy(launcherPath, path);
		appendLauncher(launcherPath);
		result = _stat(launcherPath, &statBuf) == 0;
		debug("Check launcher:\t%s %s\n", launcherPath, result ? "(OK)" : "(not found)");

		if (result && search.requiresJdk)
		{
			strcpy(javacPath, path);
			appendPath(javacPath, "bin\\javac.exe");
			result = _stat(javacPath, &statBuf) == 0;
			debug("Check javac:\t%s %s\n", javacPath, result ? "(OK)" : "(not found)");
		}

		if (!result)
		{
			// Don't display additional info in the error popup.
			SetLastError(0);
		}
	}

	return result;
}

void regSearchWow(const char* keyName)
{
	if (search.foundJava != JAVA_NOT_FOUND)
	{
		return;
	}

	if (wow64 && !jniHeader)
	{
		regSearch(keyName, JAVA_FOUND | KEY_WOW64_64KEY);
				
		if ((search.foundJava & KEY_WOW64_64KEY) != JAVA_NOT_FOUND)
		{
			return;
		}
	}

	if (!search.requires64Bit)
	{
		regSearch(keyName, JAVA_FOUND);
	}
}

BOOL findRegistryJavaHome(char* path)
{
    debugAll("findRegistryJavaHome()\n");
    if (!search.requiresJdk)
    {
		regSearchWow("SOFTWARE\\JavaSoft\\Java Runtime Environment");
	}
	regSearchWow("SOFTWARE\\JavaSoft\\Java Development Kit");

    // Java 9 support
    if (!search.requiresJdk)
    {
		regSearchWow("SOFTWARE\\JavaSoft\\JRE");
	}
	regSearchWow("SOFTWARE\\JavaSoft\\JDK");

    // IBM Java 1.8
	if (search.foundJava == JAVA_NOT_FOUND)
	{
		if (!search.requiresJdk)
    	{
			regSearchWow("SOFTWARE\\IBM\\Java Runtime Environment");
		}
		regSearchWow("SOFTWARE\\IBM\\Java Development Kit");
	}
	
	// IBM Java 1.7 and earlier
	if (search.foundJava == JAVA_NOT_FOUND)
	{
	    if (!search.requiresJdk)
    	{
			regSearchWow("SOFTWARE\\IBM\\Java2 Runtime Environment");
		}
		regSearchWow("SOFTWARE\\IBM\\Java Development Kit");
	}
	
	if (search.foundJava != JAVA_NOT_FOUND)
	{
		strcpy(path, search.foundJavaHome);
		debug("Runtime used:\t%s (%s-bit)\n", search.foundJavaVer,
				(search.foundJava & KEY_WOW64_64KEY) != JAVA_NOT_FOUND ? "64" : "32");
		return TRUE;	
	}
	
	return FALSE;
}

/*
 * Extract the executable name, returns path length.
 */
int getExePath(char* exePath)
{
    if (GetModuleFileName(hModule, exePath, _MAX_PATH) == 0)
	{
        return -1;
    }
	return strrchr(exePath, '\\') - exePath;
}

void appendPath(char* basepath, const char* path)
{
	if (basepath[strlen(basepath) - 1] != '\\')
	{
		strcat(basepath, "\\");
	}
	strcat(basepath, path);
}

void appendLauncher(char* jrePath)
{
    if (console)
	{
	    appendPath(jrePath, "bin\\java.exe");
    }
	else
	{
        appendPath(jrePath, "bin\\javaw.exe");
    }
}

void appendAppClasspath(char* dst, const char* src)
{
	strcat(dst, src);
	strcat(dst, ";");
}

/* 
 * Expand environment %variables%
 */
BOOL expandVars(char *dst, const char *src, const char *exePath, const int pathLen)
{
    char varName[STR] = {0};
    char varValue[MAX_VAR_SIZE] = {0};

    while (strlen(src) > 0)
	{
        char *start = strchr(src, '%');
        if (start != NULL)
		{
            char *end = strchr(start + 1, '%');
            if (end == NULL)
			{
                return FALSE;
            }
            // Copy content up to %VAR%
            strncat(dst, src, start - src);
            // Insert value of %VAR%
            *varName = 0;
            strncat(varName, start + 1, end - start - 1);
            // Remember value start for logging
            char *currentVarValue = dst + strlen(dst);
            
			if (strcmp(varName, "EXEDIR") == 0)
			{
                strncat(dst, exePath, pathLen);
            }
			else if (strcmp(varName, "EXEFILE") == 0)
			{
                strcat(dst, exePath);
            }
			else if (strcmp(varName, "PWD") == 0)
			{
                GetCurrentDirectory(_MAX_PATH, dst + strlen(dst));
            }
			else if (strcmp(varName, "OLDPWD") == 0)
			{
                strcat(dst, oldPwd);
			}
            else if (strcmp(varName, "JREHOMEDIR") == 0)
			{
                strcat(dst, search.foundJavaHome);
			}
			else if (strstr(varName, HKEY_STR) == varName)
			{
				regQueryValue(varName, dst + strlen(dst), BIG_STR);
            }
			else if (strcmp(varName, "") == 0)
			{
                strcat(dst, "%");
            }
			else if (GetEnvironmentVariable(varName, varValue, MAX_VAR_SIZE) > 0)
			{
                strcat(dst, varValue);
            }

            debug("Substitute:\t%s = %s\n", varName, currentVarValue);
            src = end + 1;
        }
		else
		{
            // Copy remaining content
            strcat(dst, src);
            break;
        }
	}
	return TRUE;
}

void appendHeapSizes(char *dst)
{
	MEMORYSTATUSEX statex;
	statex.dwLength = sizeof(statex);
	GlobalMemoryStatusEx(&statex);

	appendHeapSize(dst, INITIAL_HEAP_SIZE, INITIAL_HEAP_PERCENT,
			statex.ullAvailPhys, "-Xms");
	appendHeapSize(dst, MAX_HEAP_SIZE, MAX_HEAP_PERCENT,
			statex.ullAvailPhys, "-Xmx");
}

void appendHeapSize(char *dst, const int megabytesID, const int percentID,
		const DWORDLONG availableMemory, const char *option)
{
	const int mb = 1048576;			// 1 MB
	const int mbLimit32 = 1024;  	// Max heap size in MB on 32-bit JREs
	const int megabytes = loadInt(megabytesID);
	const int percent = loadInt(percentID);
	const int availableMb = availableMemory * percent / (100 * mb);	// 100% * 1 MB
    int heapSizeMb = availableMb > megabytes ? availableMb : megabytes;

	if (heapSizeMb > 0)
	{
		if (!(search.foundJava & KEY_WOW64_64KEY) && heapSizeMb > mbLimit32)
		{
			debug("Heap limit:\tReduced %d MB heap size to 32-bit maximum %d MB\n",
					heapSizeMb, mbLimit32);
			heapSizeMb = mbLimit32;
		}

		debug("Heap %s:\tRequested %d MB / %d%%, Available: %d MB, Heap size: %d MB\n",
				option, megabytes, percent, (int)(availableMemory / mb), heapSizeMb);
		strcat(dst, option);
		_itoa(heapSizeMb, dst + strlen(dst), 10);				// 10 -- radix
		strcat(dst, "m ");
	}
}

void setJvmOptions(char *jvmOptions, const char *exePath)
{
	if (loadString(JVM_OPTIONS, jvmOptions))
	{
		strcat(jvmOptions, " ");
	}

	/*
	 * Load additional JVM options from .l4j.ini file
	 * Options are separated by spaces or CRLF
	 * # starts an inline comment
	 */
	char iniFilePath[_MAX_PATH] = {0};
	strncpy(iniFilePath, exePath, strlen(exePath) - 3);
	strcat(iniFilePath, "l4j.ini");
	long hFile;

	if ((hFile = _open(iniFilePath, _O_RDONLY)) != -1)
	{
		debug("Loading:\t%s\n", iniFilePath);
		const int jvmOptLen = strlen(jvmOptions);
		char* src = jvmOptions + jvmOptLen;
		char* dst = src;
		const int len = _read(hFile, src, MAX_ARGS - jvmOptLen - BIG_STR);
		BOOL copy = TRUE;
		int i;
		for (i = 0; i < len; i++, src++)
		{
			if (*src == '#')
			{
				copy = FALSE;
			}
			else if (*src == 13 || *src == 10)
			{
				copy = TRUE;
				if (dst > jvmOptions && *(dst - 1) != ' ')
				{
					*dst++ = ' ';
				}
			}
			else if (copy)
			{
				*dst++ = *src;
			}
		}
		*dst = 0;
		if (len > 0 && *(dst - 1) != ' ')
		{
			strcat(jvmOptions, " ");
		}
		_close(hFile);
	}	
}

BOOL createMutex()
{
	char mutexName[STR] = {0};

	loadString(MUTEX_NAME, mutexName);

	if (*mutexName)
	{
        debug("Create mutex:\t%s\n", mutexName);
		SECURITY_ATTRIBUTES security;
		security.nLength = sizeof(SECURITY_ATTRIBUTES);
		security.bInheritHandle = TRUE;
		security.lpSecurityDescriptor = NULL;
		CreateMutexA(&security, FALSE, mutexName);

		if (GetLastError() == ERROR_ALREADY_EXISTS)
		{
			debug(ERROR_FORMAT, "Instance already exists.");
			return FALSE;
		}
	}
	
	return TRUE;
}

void setWorkingDirectory(const char *exePath, const int pathLen)
{
	char workingDir[_MAX_PATH] = {0};
	char tmpPath[_MAX_PATH] = {0};

	GetCurrentDirectory(_MAX_PATH, oldPwd);

	if (loadString(CHDIR, tmpPath))
	{
		strncpy(workingDir, exePath, pathLen);
		appendPath(workingDir, tmpPath);
		_chdir(workingDir);
		debug("Working dir:\t%s\n", workingDir);
	}
}

void removeChar(char *src, const char toRemove)
{
    char* dst = src;

    do
	{
		if (*src != toRemove)
		{
            *dst++ = *src;
        }
	} while (*src++ != 0);
}

BOOL pathJreSearch(const char *exePath, const int pathLen)
{
    debugAll("pathJreSearch()\n");
	char jrePathSpec[_MAX_PATH] = {0};

    if (!wow64 && search.requires64Bit)
    {
        debug("JRE:\t\tCannot use 64-bit runtime on 32-bit OS.\n");
        return FALSE;
    }
    
	if (loadString(JRE_PATH, jrePathSpec))
	{
		char jrePath[MAX_ARGS] = {0};
		expandVars(jrePath, jrePathSpec, exePath, pathLen);
		debug("JRE paths:\t%s\n", jrePath);
        char* path = strtok(jrePath, ";");
        
        while (path != NULL)
        {
            char pathNoBin[_MAX_PATH] = {0};
            char *lastBackslash = strrchr(path, '\\');
            char *lastSlash = strrchr(path, '/');

            if (lastBackslash != NULL && strcasecmp(lastBackslash, "\\bin") == 0)
            {
                strncpy(pathNoBin, path, lastBackslash - path);
            }
            else if (lastSlash != NULL && strcasecmp(lastSlash, "/bin") == 0)
            {
                strncpy(pathNoBin, path, lastSlash - path);
            }
            else
            {
                strcpy(pathNoBin, path);
            }
            
            removeChar(pathNoBin, '"');

            if (*pathNoBin == '\\' || (*pathNoBin != '\0' && *(pathNoBin + 1) == ':'))
    		{
    			// Absolute
    			strcpy(launcher.cmd, pathNoBin);
    		}
    		else
    		{
    			// Relative
    			strncpy(launcher.cmd, exePath, pathLen);
				launcher.cmd[pathLen] = 0;
    			appendPath(launcher.cmd, pathNoBin);
    		}

			BOOL is64Bit;
			if (isLauncherPathValid(launcher.cmd) && isPathJavaVersionGood(launcher.cmd, &is64Bit))
    		{
                search.foundJava = is64Bit ? JAVA_FOUND | KEY_WOW64_64KEY : JAVA_FOUND;
    			strcpy(search.foundJavaHome, launcher.cmd);
    			return TRUE;
    		}

            path = strtok(NULL, ";");
        }
    }

    return FALSE;
}

BOOL registryJreSearch()
{
    debugAll("registryJreSearch()\n");
	return *search.javaMinVer && findRegistryJavaHome(launcher.cmd);
}

void createJreSearchError()
{
	if (*search.javaMinVer)
	{
		loadString(JRE_VERSION_ERR, error.msg);
		strcat(error.msg, " ");
		strcat(error.msg, search.originalJavaMinVer);
	
		if (*search.javaMaxVer)
		{
			strcat(error.msg, " - ");
			strcat(error.msg, search.originalJavaMaxVer);
		}
	
		if (search.requires64Bit)
		{
			strcat(error.msg, " (64-bit)");
		}			
		
		if (search.corruptedJreFound)
		{
			char launcherErrMsg[BIG_STR] = {0};
	
			if (loadString(LAUNCHER_ERR, launcherErrMsg))
			{
				strcat(error.msg, "\n");
				strcat(error.msg, launcherErrMsg);
			}
		}
	
		loadString(DOWNLOAD_URL, error.url);
	}
	else
	{
		loadString(JRE_NOT_FOUND_ERR, error.msg);
	}
}

BOOL jreSearch(const char *exePath, const int pathLen)
{
    debugAll("jreSearch()\n");
	BOOL result = TRUE;

	search.requiresJdk = loadBool(REQUIRES_JDK);
	debug("Requires JDK:\t%s\n", search.requiresJdk ? "Yes" : "No");
	search.requires64Bit = loadBool(REQUIRES_64_BIT);
	debug("Requires 64-Bit: %s\n", search.requires64Bit ? "Yes" : "No");
	loadString(JAVA_MIN_VER, search.originalJavaMinVer);
	formatJavaVersion(search.javaMinVer, search.originalJavaMinVer);
	debug("Java min ver:\t%s\n", search.javaMinVer);
	loadString(JAVA_MAX_VER, search.originalJavaMaxVer);
    formatJavaVersion(search.javaMaxVer, search.originalJavaMaxVer);
    debug("Java max ver:\t%s\n", search.javaMaxVer);

	if (!pathJreSearch(exePath, pathLen))
	{
		result = registryJreSearch();
	}

	if (!result)
	{
		createJreSearchError();
	}

	return result;
}

/*
 * Append a path to the Path environment variable
 */
BOOL appendToPathVar(const char* path)
{
	char chBuf[MAX_VAR_SIZE] = {0};
	const int pathSize = GetEnvironmentVariable("Path", chBuf, MAX_VAR_SIZE);

	if (MAX_VAR_SIZE - pathSize - 1 < strlen(path))
	{
		return FALSE;
	}

	strcat(chBuf, ";");
	strcat(chBuf, path);
	return SetEnvironmentVariable("Path", chBuf);
}

BOOL appendJreBinToPathVar()
{
	// Append a path to the Path environment variable
	char jreBinPath[_MAX_PATH] = {0};
	strcpy(jreBinPath, launcher.cmd);
	strcat(jreBinPath, "\\bin");

	if (!appendToPathVar(jreBinPath))
	{
		debug(ERROR_FORMAT, "appendToPathVar failed.");
		return FALSE;
	}
	
	return TRUE;
}

void setEnvironmentVariables(const char *exePath, const int pathLen)
{
	char tmp[MAX_ARGS] = {0};
	char envVars[MAX_VAR_SIZE] = {0};
	loadString(ENV_VARIABLES, envVars);
	char *var = strtok(envVars, "\t");

	while (var != NULL)
	{
		char *varValue = strchr(var, '=');
		*varValue++ = 0;
		*tmp = 0;
		expandVars(tmp, varValue, exePath, pathLen);
		debug("Set var:\t%s = %s\n", var, tmp);
		SetEnvironmentVariable(var, tmp);
		var = strtok(NULL, "\t"); 
	}
}

void setMainClassAndClassPath(const char *exePath, const int pathLen)
{
	char classPath[MAX_ARGS] = {0};
	char expandedClassPath[MAX_ARGS] = {0};
	char jar[_MAX_PATH] = {0};
	char fullFileName[_MAX_PATH] = {0};
	const BOOL wrapper = loadBool(WRAPPER);
	loadString(JAR, jar);

	if (loadString(MAIN_CLASS, launcher.mainClass))
	{
        debug("Main class:\t%s\n", launcher.mainClass);

		if (!loadString(CLASSPATH, classPath))
		{
			debug("Info:\t\tClasspath not defined.\n");
		}
		
		expandVars(expandedClassPath, classPath, exePath, pathLen);
		strcat(launcher.args, "-classpath \"");

		if (wrapper)
		{
			appendAppClasspath(launcher.args, exePath);
		}
		else if (*jar)
		{
			appendAppClasspath(launcher.args, jar);
		}

		// Deal with wildcards or >> strcat(launcherArgs, exp); <<
		char* cp = strtok(expandedClassPath, ";");

		while(cp != NULL)
		{
			debug("Add classpath:\t%s\n", cp);
			if (strpbrk(cp, "*?") != NULL)
			{
				char* lastBackslash = strrchr(cp, '\\');
				int pathLen = lastBackslash != NULL ? lastBackslash - cp + 1 : 0;
				*fullFileName = 0;
				strncpy(fullFileName, cp, pathLen);
				char* fileName = fullFileName + pathLen;
				*fileName = 0;
				struct _finddata_t c_file;
				long hFile;

				if ((hFile = _findfirst(cp, &c_file)) != -1L)
				{
					do
					{
						strcpy(fileName, c_file.name);
						appendAppClasspath(launcher.args, fullFileName);
						debug("      \"      :\t%s\n", fullFileName);
					} while (_findnext(hFile, &c_file) == 0);
				}

				_findclose(hFile);
			}
			else
			{
				appendAppClasspath(launcher.args, cp);
			}
			cp = strtok(NULL, ";");
		}

		*(launcher.args + strlen(launcher.args) - 1) = 0;
		strcat(launcher.args, "\" ");
		strcat(launcher.args, launcher.mainClass);
	}
	else if (wrapper)
	{
       	strcat(launcher.args, "-jar \"");
		strcat(launcher.args, exePath);
   		strcat(launcher.args, "\"");
    }
	else
	{
       	strcat(launcher.args, "-jar \"");
        strncat(launcher.args, exePath, pathLen);
        appendPath(launcher.args, jar);
       	strcat(launcher.args, "\"");
    }
}

void setCommandLineArgs(const char *lpCmdLine)
{
	char tmp[MAX_ARGS] = {0};

	// Constant command line arguments
	if (loadString(CMD_LINE, tmp))
	{
		strcat(launcher.args, " ");
		strcat(launcher.args, tmp);
	}

	// Command line arguments
	if (*lpCmdLine)
	{
		strcpy(tmp, lpCmdLine);
		char* dst;
		while ((dst = strstr(tmp, "--l4j-")) != NULL)
		{
			char* src = strchr(dst, ' ');
			if (src == NULL || *(src + 1) == 0)
			{
				*dst = 0;
			}
			else
			{
				strcpy(dst, src + 1);
			}
		}
		if (*tmp)
		{
			strcat(launcher.args, " ");
			strcat(launcher.args, tmp);
		}
	}
}

int prepare(const char *lpCmdLine, BOOL jni)
{
	if (!initGlobals(jni))
	{
		return FALSE;
	}

	// Get executable path
	char exePath[_MAX_PATH] = {0};
	int pathLen = getExePath(exePath);

	if (pathLen == -1)
	{
		return FALSE;
	}

	if (!initializeLogging(lpCmdLine, exePath, pathLen))
	{
		return FALSE;
	}

	debug("JNI:\t\t%s\n", jniHeader ? "Yes" : "No");
    setWow64Flag();

	// Set default error message, title and optional support web site url.
	loadString(ERR_TITLE, error.title);
	loadString(SUPPORT_URL, error.url);

	if (!loadString(STARTUP_ERR, error.msg))
	{
		debug(ERROR_FORMAT, "Startup error message not defined.");
		return FALSE;			
	}

	// Single instance
	if (!createMutex())
	{
		return ERROR_ALREADY_EXISTS;
	}

	setWorkingDirectory(exePath, pathLen);
    
	if (!jreSearch(exePath, pathLen))
    {
		return FALSE;
	}

	if (!appendJreBinToPathVar())
	{
		return FALSE;
	}

	setEnvironmentVariables(exePath, pathLen);
	processPriority = loadInt(PRIORITY_CLASS);
	appendLauncher(launcher.cmd);
	appendHeapSizes(launcher.args);

	char jvmOptions[MAX_ARGS] = {0};
	setJvmOptions(jvmOptions, exePath);
	expandVars(launcher.args, jvmOptions, exePath, pathLen);
	setMainClassAndClassPath(exePath, pathLen);
	setCommandLineArgs(lpCmdLine);

	debug("Launcher:\t%s\n", launcher.cmd);
	debug("Launcher args:\t%s\n", launcher.args);
	debug("Args length:\t%d/32768 chars\n", strlen(launcher.args));
	return TRUE;
}

void closeProcessHandles()
{
	CloseHandle(processInformation.hThread);
	CloseHandle(processInformation.hProcess);
}

BOOL execute(const BOOL wait, DWORD *dwExitCode)
{
	STARTUPINFO si;

    memset(&processInformation, 0, sizeof(processInformation));
    memset(&si, 0, sizeof(si));
    si.cb = sizeof(si);

	char cmdline[MAX_ARGS] = {0};
    strcpy(cmdline, "\"");
	strcat(cmdline, launcher.cmd);
	strcat(cmdline, "\" ");
	strcat(cmdline, launcher.args);

	if (CreateProcess(NULL, cmdline, NULL, NULL,
			TRUE, processPriority, NULL, NULL, &si, &processInformation))
	{
		if (wait)
		{
			WaitForSingleObject(processInformation.hProcess, INFINITE);
			GetExitCodeProcess(processInformation.hProcess, dwExitCode);
			closeProcessHandles();
		}
		else
		{
			*dwExitCode = 0;
		}
		
		return TRUE;
	}

	*dwExitCode = -1;
	return FALSE;
}

const char* getJavaHome()
{
	return search.foundJavaHome;
}

const char* getMainClass()
{
	return launcher.mainClass;	
}

const char* getLauncherArgs()
{
    return launcher.args;    
}

/* read java version output and save version string in version */
void getVersionFromOutput(HANDLE outputRd, char *version, int versionLen, BOOL *is64Bit)
{
	CHAR chBuf[BIG_STR] = {0}, *bptr = chBuf;
	DWORD dwRead, remain = sizeof(chBuf);
	BOOL bSuccess = FALSE;

	while (remain > 0) {
		bSuccess = ReadFile(outputRd, bptr, remain, &dwRead, NULL);
		if (! bSuccess || dwRead == 0) break;
		bptr += dwRead;
		remain -= dwRead;
	}
	debugAll("Java version output: %s\n", chBuf);
	*version = '\0';
	const char *verStartPtr = strchr(chBuf, '"');
	if (verStartPtr == NULL)
	{
		debug("Cannot get version string: cannot find quote\n");
		return;
	}
	const char *verEndPtr = strchr(++verStartPtr, '"');
	if (verEndPtr == NULL)
	{
		debug("Cannot get version string: missing end quote\n");
		return;
	}
	size_t len = verEndPtr - verStartPtr;
	if (len >= versionLen) {
		debug("Cannot get version string: data too large\n");
		return;
	}
	memcpy(version, verStartPtr, len);
	version[len] = '\0';
	*is64Bit = strstr(chBuf, "64-Bit") != NULL || strstr(chBuf, "64-bit") != NULL;
}

/* create a child process with cmdline and set stderr/stdout to outputWr */
BOOL CreateChildProcess(char *cmdline, HANDLE outputWr)
{
	PROCESS_INFORMATION piProcInfo;
	STARTUPINFO siStartInfo;
	BOOL bSuccess = FALSE;

	ZeroMemory(&piProcInfo, sizeof(PROCESS_INFORMATION));
	ZeroMemory(&siStartInfo, sizeof(STARTUPINFO));
	siStartInfo.cb = sizeof(STARTUPINFO);
	siStartInfo.hStdError = outputWr;
	siStartInfo.hStdOutput = outputWr;
	siStartInfo.dwFlags |= STARTF_USESTDHANDLES;

	debugAll("Create process: %s\n", cmdline);
	bSuccess = CreateProcess(NULL, cmdline, NULL, NULL, TRUE, CREATE_NO_WINDOW, NULL, NULL, &siStartInfo, &piProcInfo);   
	if (!bSuccess)
	{
		debug("Cannot create process %s\n", cmdline);
	}
	else
	{
		CloseHandle(piProcInfo.hProcess);
		CloseHandle(piProcInfo.hThread);
	}
	CloseHandle(outputWr);
	return bSuccess;
}

BOOL isJavaVersionGood(const char *version, BOOL is64Bit)
{
	BOOL result = (!*search.javaMinVer || strcmp(version, search.javaMinVer) >= 0)
		&& (!*search.javaMaxVer || strcmp(version, search.javaMaxVer) <= 0)
		&& (!search.requires64Bit || is64Bit)
		&& (!jniHeader || !is64Bit);
	debug("Version string: %s / %s-Bit (%s)\n", version, is64Bit ? "64" : "32", result ? "OK" : "Ignore");
	return result;
}

/*
 * Run <path>/bin/java(w) -version. Return TRUE if version is good.
 */
BOOL isPathJavaVersionGood(const char *path, BOOL *is64Bit)
{
	SECURITY_ATTRIBUTES saAttr;
	HANDLE outputRd = NULL;
	HANDLE outputWr = NULL;

	debugAll("Check Java Version: %s min=%s max=%s\n", path, search.javaMinVer, search.javaMaxVer);

	saAttr.nLength = sizeof(SECURITY_ATTRIBUTES);
	saAttr.bInheritHandle = TRUE;
	saAttr.lpSecurityDescriptor = NULL;

	// Create a pipe for the child process's STDOUT.
	if (!CreatePipe(&outputRd, &outputWr, &saAttr, 0))
	{
		debug("Cannot create pipe\n");
		return FALSE;
	}
	// Ensure the read handle to the pipe for STDOUT is not inherited.
	if (!SetHandleInformation(outputRd, HANDLE_FLAG_INHERIT, 0))
	{
		debug("Cannot set handle information\n");
		CloseHandle(outputRd);
		CloseHandle(outputWr);
		return FALSE;
	}
	// create child process
	char cmdline[MAX_ARGS] = {0};
	char launcherPath[_MAX_PATH] = {0};
	strcpy(launcherPath, path);
	appendLauncher(launcherPath);
	snprintf(cmdline, MAX_ARGS, "\"%s\" -version", launcherPath);
	if (!CreateChildProcess(cmdline, outputWr))
	{
		debug("Cannot run java(w) -version\n");
		CloseHandle(outputRd);
		return FALSE;
	}
	char version[STR] = {0}, formattedVersion[STR] = {0};
	
	getVersionFromOutput(outputRd, version, sizeof(version), is64Bit);
	CloseHandle(outputRd);
	if (*version != '\0')
	{
		formatJavaVersion(formattedVersion, version);
		return isJavaVersionGood(formattedVersion, *is64Bit);
	}
	return FALSE;
}