/* Copyright (C) 1999-2002, Ghostgum Software Pty Ltd.  All rights reserved.
  
  This software is provided AS-IS with no warranty, either express or
  implied.
  
  This software is distributed under license and may not be copied,
  modified or distributed except as expressly authorized under the terms
  of the license contained in the file LICENSE in this distribution.
  
  For more information about licensing, please refer to
  http://www.ghostscript.com/licensing/. For information on
  commercial licensing, go to http://www.artifex.com/licensing/ or
  contact Artifex Software, Inc., 101 Lucas Valley Road #110,
  San Rafael, CA  94903, U.S.A., +1(415)492-9861.
*/

// $Id: dwinst.cpp,v 1.6 2004/11/18 06:48:41 ghostgum Exp $

#define STRICT
#include <windows.h>
#include <objbase.h>
#include <shlobj.h>
#include <stdio.h>
#include <io.h>
#include <direct.h>

#include "dwinst.h"

#define UNINSTALLKEY TEXT("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall")
#define UNINSTALLSTRINGKEY TEXT("UninstallString")
#define DISPLAYNAMEKEY TEXT("DisplayName")
#define UNINSTALL_FILE "uninstal.txt"
char szSection[] = "////////////////////////////////\n";

#ifdef _MSC_VER
#define mktemp(x) _mktemp(x)
#define chdir(x) _chdir(x)
#define mkdir(x) _mkdir(x)
#endif



//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

CInstall::CInstall()
{
	CoInitialize(NULL);
	
	m_szTargetDir[0] = '\0';
	m_szTargetGroup[0] = '\0';
	m_szPrograms[0] = '\0';
	m_szMainDir[0] = '\0';
	AddMessageFn = NULL;
	SetAllUsers(FALSE);
}

CInstall::~CInstall()
{
	CoUninitialize();
}

void CInstall::CleanUp(void)
{
	// delete all temporary files
	if (m_fLogNew)
		fclose(m_fLogNew);
	m_fLogNew = NULL;
	if (m_fLogOld)
		fclose(m_fLogOld);
	m_fLogOld = NULL;
	
	if (strlen(m_szRegistryNew))
		DeleteFile(m_szRegistryNew);
	m_szRegistryNew[0] = '\0';
	
	if (strlen(m_szRegistryOld))
		DeleteFile(m_szRegistryOld);
	m_szRegistryOld[0] = '\0';
	
	if (strlen(m_szShellNew))
		DeleteFile(m_szShellNew);
	m_szShellNew[0] = '\0';
	
	if (strlen(m_szShellOld))
		DeleteFile(m_szShellOld);
	m_szShellOld[0] = '\0';
	
	if (strlen(m_szFileNew))
		DeleteFile(m_szFileNew);
	m_szFileNew[0] = '\0';
}


void CInstall::SetMessageFunction(void(*fn)(const char *))
{
	AddMessageFn = fn;
}

void CInstall::AddMessage(const char *message)
{
	if (AddMessageFn)
		(*AddMessageFn)(message);
}

void CInstall::SetTargetDir(const char *szTargetDir)
{
	strcpy(m_szTargetDir, szTargetDir);
	// remove trailing backslash
	char *p;
	p = m_szTargetDir + strlen(m_szTargetDir) - 1;
	if (*p == '\\')
		*p = '\0';
}

void CInstall::SetTargetGroup(const char *szTargetGroup)
{
	strcpy(m_szTargetGroup, szTargetGroup);
	// remove trailing backslash
	char *p;
	p = m_szTargetGroup + strlen(m_szTargetGroup) - 1;
	if (*p == '\\')
		*p = '\0';
}

const char *CInstall::GetMainDir()
{
	return m_szMainDir;
}

const char *CInstall::GetUninstallName()
{
	return m_szUninstallName;
}

BOOL CInstall::Init(const char *szSourceDir, const char *szFileList)
{
	FILE *f;
	
	strcpy(m_szSourceDir, szSourceDir);
	// remove trailing backslash
	char *p;
	p = m_szSourceDir + strlen(m_szSourceDir) - 1;
	if (*p == '\\')
		*p = '\0';
	strcpy(m_szFileList, szFileList);
	
	m_szRegistryNew[0] = m_szRegistryOld[0] = 
		m_szShellNew[0] = m_szShellOld[0] = 
		m_szFileNew[0] = '\0';
	
	// Open list of files
	SetCurrentDirectory(m_szSourceDir);
	f = fopen(m_szFileList, "r");
	if (f == (FILE *)NULL) {
		char buf[MAXSTR];
		wsprintf(buf, "Failed to open \042%s\042\n", m_szFileList);
		AddMessage(buf);
		return FALSE;
	}
	
	// get application and directory name
	m_szUninstallName[0] = '\0';
	if (!fgets(m_szUninstallName, sizeof(m_szUninstallName), f)) {
		AddMessage("Invalid file list\n");
		fclose(f);
		return FALSE;
	}
	if (*m_szUninstallName )
		m_szUninstallName[strlen(m_szUninstallName)-1] = '\0';
	
	m_szMainDir[0] = '\0';
	if (!fgets(m_szMainDir, sizeof(m_szMainDir), f)) {
		AddMessage("Invalid file list\n");
		fclose(f);
		return FALSE;
	}
	if (*m_szMainDir )
		m_szMainDir[strlen(m_szMainDir)-1] = '\0';
	fclose(f);
	
	// Create log directory
	strcpy(m_szLogDir, m_szTargetDir);
	strcat(m_szLogDir, "\\");
	strcat(m_szLogDir, m_szMainDir);
	MakeDir(m_szLogDir);
	
	return TRUE;
}


//////////////////////////////////////////
// File installation methods

BOOL CInstall::InstallFiles(BOOL bNoCopy, BOOL *pbQuit)
{
	char szLogNew[MAXSTR];
	
	AddMessage(bNoCopy ? "Checking" : "Copying");
	AddMessage(" files listed in ");
	AddMessage(m_szFileList);
	AddMessage("\n");
	
	// Open list of files
	SetCurrentDirectory(m_szSourceDir);
	FILE *f = fopen(m_szFileList, "r");
	if (f == (FILE *)NULL) {
		AddMessage("Failed to open \042");
		AddMessage(m_szFileList);
		AddMessage("\042\n");
		return FALSE;
	}
	
	// skip application and directory name
	fgets(szLogNew, sizeof(szLogNew), f);
	fgets(szLogNew, sizeof(szLogNew), f);
	
	// Create target log
	
	m_fLogNew = MakeTemp(m_szFileNew);
	if (!m_fLogNew) {
		AddMessage("Failed to create FileNew temporary file\n");
		return FALSE;
	}
	
	// Copy files
	char line[MAXSTR];
	while (fgets(line, sizeof(line), f) != (char *)NULL) {
		if (*pbQuit)
			return FALSE;
		if (*line)
			line[strlen(line)-1] = '\0';
		if (!InstallFile(line, bNoCopy)) {
			fclose(f);
			fclose(m_fLogNew);
			return FALSE;
		}
	}
	fclose(f);
	fclose(m_fLogNew);
	m_fLogNew = NULL;
	return TRUE;
}


void CInstall::AppendFileNew(const char *filename)
{
    FILE *f;
    /* mark backup file for uninstall */
    if ((f = fopen(m_szFileNew, "a")) != (FILE *)NULL) {
	fputs(filename, f);
	fputs("\n", f);
	fclose(f);
    }
}

// recursive mkdir
// requires a full path to be specified, so ignores root \ 
// apart from root \, must not contain trailing \
// Examples:
//  c:\          (OK, but useless)
//  c:\gstools   (OK)
//  c:\gstools\  (incorrect)
//  c:gstools    (incorrect)
//  gstools      (incorrect)
// The following UNC names should work,
// but didn't under Win3.1 because gs_chdir wouldn't accept UNC names
// Needs to be tested under Windows 95.
//  \\server\sharename\gstools    (OK)
//  \\server\sharename\           (OK, but useless)
//

BOOL CInstall::MakeDir(const char *dirname)
{
	char newdir[MAXSTR];
	const char *p;
    if (strlen(dirname) < 3)
        return -1;
	
    if (isalpha(dirname[0]) && dirname[1]==':' && dirname[2]=='\\') {
        // drive mapped path
        p = dirname+3;
    }
    else if (dirname[1]=='\\' && dirname[1]=='\\') {
        // UNC path
        p = strchr(dirname+2, '\\');    // skip servername
        if (p == NULL)
            return -1;
        p++;
        p = strchr(p, '\\');            // skip sharename
        if (p == NULL)
            return -1;
    }
    else {
        // not full path so error
        return -1;
    }
	
    while (1) {
        strncpy(newdir, dirname, (int)(p-dirname));
        newdir[(int)(p-dirname)] = '\0';
        if (chdir(newdir)) {
            if (mkdir(newdir))
                return -1;
        }
        p++;
        if (p >= dirname + strlen(dirname))
            break;              // all done
        p = strchr(p, '\\');
        if (p == NULL)
            p = dirname + strlen(dirname);
    }
	
    return SetCurrentDirectory(dirname);
}

void CInstall::ResetReadonly(const char *filename)
{
    DWORD dwAttr = GetFileAttributes(filename);
    if (dwAttr & FILE_ATTRIBUTE_READONLY)
        SetFileAttributes(filename, dwAttr & (~FILE_ATTRIBUTE_READONLY));
}

BOOL CInstall::InstallFile(char *filename, BOOL bNoCopy)
{
	char existing_name[MAXSTR];
	char new_name[MAXSTR];
	char dir_name[MAXSTR];
	
	strcpy(existing_name, m_szSourceDir);
	strcat(existing_name, "\\");
	strcat(existing_name, filename);
	strcpy(new_name, m_szTargetDir);
	strcat(new_name, "\\");
	strcat(new_name, filename);
	strcpy(dir_name, new_name);
	char *p = strrchr(dir_name, '\\');
	if (p) {
		*p = '\0';
		if (!MakeDir(dir_name)) {
			AddMessage("Failed to make directory ");
			AddMessage(dir_name);
			AddMessage("\n");
			return FALSE;
		}
	}
	AddMessage("   ");
	AddMessage(new_name);
	AddMessage("\n");
	
	if (bNoCopy) {
		// Don't copy files.  Leave them where they are.
		// Check that all files exist
		FILE *f;
		if ((f = fopen(existing_name, "r")) == (FILE *)NULL) {
			AddMessage("Missing file ");
			AddMessage(existing_name);
			AddMessage("\n");
			return FALSE;
		}
		fclose(f);
	}
	else {
		if (!CopyFile(existing_name, new_name, FALSE)) {
			char message[MAXSTR+MAXSTR+100];
			wsprintf(message, "Failed to copy file %s to %s\n", 
				existing_name, new_name);
			AddMessage(message);
			return FALSE;
		}
		ResetReadonly(new_name);
		fputs(new_name, m_fLogNew);
		fputs("\n", m_fLogNew);
	}
	
	
	return TRUE;
}

//////////////////////////////////////////
// Shell methods

BOOL CInstall::StartMenuBegin()
{
	m_fLogNew = MakeTemp(m_szShellNew);
	if (!m_fLogNew) {
		AddMessage("Failed to create ShellNew temporary file\n");
		return FALSE;
	}
	
	m_fLogOld = MakeTemp(m_szShellOld);
	if (!m_fLogOld) {
		AddMessage("Failed to create ShellNew temporary file\n");
		return FALSE;
	}
	
	// make folder if needed
	char szLink[MAXSTR];
	strcpy(szLink, m_szPrograms);
	strcat(szLink, "\\");
	strcat(szLink, m_szTargetGroup);
	if (chdir(szLink) != 0) {
		if (mkdir(szLink) != 0) {
			char buf[MAXSTR+64];
			wsprintf(buf, "Couldn't make Programs folder \042%s'042", szLink);
			AddMessage(buf);
			StartMenuEnd();
			return FALSE;
		}
	}
	else {
		fprintf(m_fLogOld, "Group=%s\n\n", szLink);
	}
	fprintf(m_fLogNew, "Group=%s\n\n", szLink);
	
	return TRUE;
}

BOOL CInstall::StartMenuEnd()
{
	if (m_fLogOld)
		fclose(m_fLogOld);
	m_fLogOld = NULL;
	if (m_fLogNew)
		fclose(m_fLogNew);
	m_fLogNew = NULL;
	return TRUE;
}

BOOL CInstall::StartMenuAdd(const char *szDescription, 
							const char *szProgram, const char *szArguments) 
{
	if (!CreateShellLink(szDescription, szProgram, szArguments)) {
		AddMessage("Couldn't make shell link for ");
		AddMessage(szDescription);
		AddMessage("\n");
		StartMenuEnd();
		return FALSE;
	}
	
	return TRUE;
}


BOOL CInstall::CreateShellLink(LPCSTR description, LPCSTR program, 
							   LPCSTR arguments, LPCSTR icon, int nIconIndex)
{
	HRESULT hres;    
	IShellLink* psl;
	CHAR szLink[MAXSTR];
	strcpy(szLink, m_szPrograms);
	strcat(szLink, "\\");
	strcat(szLink, m_szTargetGroup);
	strcat(szLink, "\\");
	strcat(szLink, description);
	strcat(szLink, ".LNK");
	AddMessage("Adding shell link\n   ");
	AddMessage(szLink);
	AddMessage("\n");
	
	// Ensure string is UNICODE.
	WCHAR wsz[MAX_PATH];
	MultiByteToWideChar(CP_ACP, 0, szLink, -1, wsz, MAX_PATH);
	
	// Save old shell link
	
	// Get a pointer to the IShellLink interface.
	hres = CoCreateInstance(CLSID_ShellLink, NULL, CLSCTX_INPROC_SERVER,
		IID_IShellLink, (void **)&psl);
	if (SUCCEEDED(hres))    {
		IPersistFile* ppf;
		// Query IShellLink for the IPersistFile interface.
		hres = psl->QueryInterface(IID_IPersistFile, (void **)&ppf);
		if (SUCCEEDED(hres))       {            
			// Load the shell link.
			hres = ppf->Load(wsz, STGM_READ);
			if (SUCCEEDED(hres)) {
				// Resolve the link.
				hres = psl->Resolve(HWND_DESKTOP, SLR_ANY_MATCH);       
				if (SUCCEEDED(hres)) {
					// found it, so save details
					CHAR szTemp[MAXSTR];
					WIN32_FIND_DATA wfd;
					int i;
					
					
					fprintf(m_fLogOld, "Name=%s\n", szLink);
					hres = psl->GetPath(szTemp, MAXSTR, (WIN32_FIND_DATA *)&wfd, 
						SLGP_SHORTPATH );
					if (SUCCEEDED(hres))
						fprintf(m_fLogOld, "Path=%s\n", szTemp);
					hres = psl->GetDescription(szTemp, MAXSTR);
					if (SUCCEEDED(hres))
						fprintf(m_fLogOld, "Description=%s\n", szTemp);
					hres = psl->GetArguments(szTemp, MAXSTR);
					if (SUCCEEDED(hres) && (szTemp[0] != '\0'))
						fprintf(m_fLogOld, "Arguments=%s\n", szTemp);
					hres = psl->GetWorkingDirectory(szTemp, MAXSTR);
					if (SUCCEEDED(hres) && (szTemp[0] != '\0'))
						fprintf(m_fLogOld, "Directory=%s\n", szTemp);
					hres = psl->GetIconLocation(szTemp, MAXSTR, &i);
					if (SUCCEEDED(hres) && (szTemp[0] != '\0')) {
						fprintf(m_fLogOld, "IconLocation=%s\n", szTemp);
						fprintf(m_fLogOld, "IconIndex=%d\n", i);
					}
					fprintf(m_fLogOld, "\n");
				}      
			}
			// Release pointer to IPersistFile.         
			ppf->Release();       
		}
		// Release pointer to IShellLink.       
		psl->Release();    
	}
	
	
	// Save new shell link
	
	// Get a pointer to the IShellLink interface.
	hres = CoCreateInstance(CLSID_ShellLink, NULL, CLSCTX_INPROC_SERVER,
		IID_IShellLink, (void **)&psl);
	if (SUCCEEDED(hres))    {
		IPersistFile* ppf;
		// Query IShellLink for the IPersistFile interface for 
		// saving the shell link in persistent storage.
		hres = psl->QueryInterface(IID_IPersistFile, (void **)&ppf);
		if (SUCCEEDED(hres)) {            
			fprintf(m_fLogNew, "Name=%s\n", szLink);
			
			// Set the path to the shell link target.
			hres = psl->SetPath(program);         
			if (!SUCCEEDED(hres))
				AddMessage("SetPath failed!");
			fprintf(m_fLogNew, "Path=%s\n", program);
			// Set the description of the shell link.
			hres = psl->SetDescription(description);         
			if (!SUCCEEDED(hres))
				AddMessage("SetDescription failed!");
			fprintf(m_fLogNew, "Description=%s\n", description);
			if (arguments != (LPCSTR)NULL) {
				// Set the arguments of the shell link target.
				hres = psl->SetArguments(arguments);         
				if (!SUCCEEDED(hres))
					AddMessage("SetArguments failed!");
				fprintf(m_fLogNew, "Arguments=%s\n", arguments);
			}
			if (icon != (LPCSTR)NULL) {
				// Set the arguments of the shell link target.
				hres = psl->SetIconLocation(icon, nIconIndex);         
				if (!SUCCEEDED(hres))
					AddMessage("SetIconLocation failed!");
				fprintf(m_fLogNew, "IconLocation=%s\n", icon);
				fprintf(m_fLogNew, "IconIndex=%d\n", nIconIndex);
			}
			
			// Save the link via the IPersistFile::Save method.
			hres = ppf->Save(wsz, TRUE);    
			// Release pointer to IPersistFile.         
			ppf->Release();
		}
		// Release pointer to IShellLink.       
		psl->Release();    
		fprintf(m_fLogNew, "\n");
	}
	
	return (hres == 0);
}


//////////////////////////////////////////
// Registry methods

void
reg_quote(char *d, const char *s)
{
    while (*s) {
		if (*s == '\\')
			*d++ = '\\';
		*d++ = *s++;
    }
    *d = *s;
}

BOOL CInstall::UpdateRegistryBegin()
{
	const char regheader[]="REGEDIT4\n";
	m_fLogNew = MakeTemp(m_szRegistryNew);
	if (!m_fLogNew) {
		AddMessage("Failed to create RegistryNew temporary file\n");
		return FALSE;
	}
	fputs(regheader, m_fLogNew);
	
	m_fLogOld = MakeTemp(m_szRegistryOld);
	if (!m_fLogOld) {
		AddMessage("Failed to create RegistryOld temporary file\n");
		UpdateRegistryEnd();
		return FALSE;
	}
	fputs(regheader, m_fLogOld);
	
	return TRUE;
}

BOOL CInstall::UpdateRegistryEnd()
{
	if (m_fLogNew)
		fclose(m_fLogNew);
	m_fLogNew = NULL;
	if (m_fLogOld)
		fclose(m_fLogOld);
	m_fLogOld = NULL;
	return TRUE;
}

BOOL CInstall::UpdateRegistryKey(const char *product, const char *version)
{
	const char hkey_name[] = "HKEY_LOCAL_MACHINE";
	const HKEY hkey_key = HKEY_LOCAL_MACHINE;
	const char key_format[] = "\n[%s\\%s]\n";
	
	/* Create default registry entries */
	HKEY hkey;
	LONG lrc;
	char name[MAXSTR];
	
	// Create/Open application key
	sprintf(name, "SOFTWARE\\%s", product);
	lrc = RegOpenKey(hkey_key, name, &hkey);
	if (lrc == ERROR_SUCCESS) {
		fprintf(m_fLogOld, key_format, hkey_name, name);
	}
	else {
		lrc = RegCreateKey(hkey_key, name, &hkey);
		if (lrc == ERROR_SUCCESS)
			fprintf(m_fLogNew, key_format, hkey_name, name);
	}
	if (lrc == ERROR_SUCCESS)
		RegCloseKey(hkey);
	
	// Create/Open application version key
	sprintf(name, "SOFTWARE\\%s\\%s", product, version);
	
	AddMessage("   ");
	AddMessage(hkey_name);
	AddMessage("\\");
	AddMessage(name);
	AddMessage("\n");
	lrc = RegOpenKey(hkey_key, name, &hkey);
	if (lrc == ERROR_SUCCESS)
		fprintf(m_fLogOld, key_format, hkey_name, name);
	else 
		lrc = RegCreateKey(hkey_key, name, &hkey);
	if (lrc == ERROR_SUCCESS) {
		fprintf(m_fLogNew, key_format, hkey_name, name);
	}
	else {
		UpdateRegistryEnd();
	}
	return TRUE;
}

BOOL CInstall::UpdateRegistryValue(const char *product, const char *version, 
								   const char *name, const char *value)
{
	char appver[MAXSTR];
	BOOL flag = FALSE;
	HKEY hkey;
	// Open application/version key
	sprintf(appver, "SOFTWARE\\%s\\%s", product, version);
	
	if (RegOpenKey(HKEY_LOCAL_MACHINE, appver, &hkey)
		== ERROR_SUCCESS) {
		flag = SetRegistryValue(hkey, name, value);
		RegCloseKey(hkey);
	}
	
	return flag;
}

BOOL CInstall::SetRegistryValue(HKEY hkey, const char *value_name, const char *value)
{
	char buf[MAXSTR];
	char qbuf[MAXSTR];
	DWORD cbData;
	DWORD keytype;
	
	cbData = sizeof(buf);
	keytype =  REG_SZ;
	if (RegQueryValueEx(hkey, value_name, 0, &keytype, 
		(LPBYTE)buf, &cbData) == ERROR_SUCCESS) {
		reg_quote(qbuf, buf);
		fprintf(m_fLogOld, "\042%s\042=\042%s\042\n", value_name, qbuf);
	}
	reg_quote(qbuf, value);
	fprintf(m_fLogNew, "\042%s\042=\042%s\042\n", value_name, qbuf);
	AddMessage("      ");
	AddMessage(value_name);
	AddMessage("=");
	AddMessage(value);
	AddMessage("\n");
	if (RegSetValueEx(hkey, value_name, 0, REG_SZ, 
		(CONST BYTE *)value, strlen(value)+1) != ERROR_SUCCESS)
		return FALSE;
	return TRUE;
}

////////////////////////////////////
// Uninstall


BOOL CInstall::WriteUninstall(const char *szProg, BOOL bNoCopy)
{
	LONG rc;
	HKEY hkey;
	HKEY hsubkey;
	char buffer[MAXSTR];
	char ungsprog[MAXSTR];
	
	lstrcpy(ungsprog, m_szTargetDir);
	lstrcat(ungsprog, "\\");
	lstrcat(ungsprog, szProg);
	
	lstrcpy(buffer, m_szSourceDir);
	lstrcat(buffer, "\\");
	lstrcat(buffer, szProg);
	
	if (bNoCopy) {
		// Don't copy files.  Leave them where they are.
		// Check that all files exist
		FILE *f;
		if ((f = fopen(buffer, "r")) == (FILE *)NULL) {
			AddMessage("Missing file ");
			AddMessage(buffer);
			AddMessage("\n");
			return FALSE;
		}
		fclose(f);
	}
	else if (!CopyFile(buffer, ungsprog, FALSE)) {
		char message[MAXSTR+MAXSTR+100];
		wsprintf(message, "Failed to copy file %s to %s", buffer, ungsprog);
		AddMessage(message);
		return FALSE;
	}
	ResetReadonly(ungsprog);
	
	/* write registry entries for uninstall */
	if ((rc = RegOpenKeyEx(HKEY_LOCAL_MACHINE, UNINSTALLKEY, 0, 
		KEY_ALL_ACCESS, &hkey)) != ERROR_SUCCESS) {
		/* failed to open key, so try to create it */
        rc = RegCreateKey(HKEY_LOCAL_MACHINE, UNINSTALLKEY, &hkey);
	}
	if (rc == ERROR_SUCCESS) {
		// Uninstall key for program
		if (RegCreateKey(hkey, m_szUninstallName, &hsubkey) == ERROR_SUCCESS) {
			RegSetValueEx(hsubkey, DISPLAYNAMEKEY, 0, REG_SZ,
				(CONST BYTE *)m_szUninstallName, lstrlen(m_szUninstallName)+1);
			lstrcpy(buffer, ungsprog);
			lstrcat(buffer, " \042");
			lstrcat(buffer, m_szTargetDir);
			lstrcat(buffer, "\\");
			lstrcat(buffer, m_szMainDir);
			lstrcat(buffer, "\\");
			lstrcat(buffer, UNINSTALL_FILE);
			lstrcat(buffer, "\042");
			AddMessage("   ");
			AddMessage(m_szUninstallName);
			AddMessage("=");
			AddMessage(buffer);
			AddMessage("\n");
			RegSetValueEx(hsubkey, UNINSTALLSTRINGKEY, 0, REG_SZ,
				(CONST BYTE *)buffer, lstrlen(buffer)+1);
			RegCloseKey(hsubkey);
		}
		
		RegCloseKey(hkey);
	}
	return TRUE;
}


void
CInstall::CopyFileContents(FILE *df, FILE *sf)
{
	char buf[MAXSTR];
	int count;
	while ((count = fread(buf, 1, sizeof(buf), sf)) != 0)
		fwrite(buf, 1, count, df);
}

FILE *CInstall::MakeTemp(char *fname)
{
	char *temp;
	if ( (temp = getenv("TEMP")) == NULL )
		strcpy(fname, m_szTargetDir);
	else
		strcpy(fname, temp);
	
	/* Prevent X's in path from being converted by mktemp. */
	for ( temp = fname; *temp; temp++ ) {
		*temp = (char)tolower(*temp);
		if (*temp == '/')
			*temp = '\\';
	}
	if ( strlen(fname) && (fname[strlen(fname)-1] != '\\') )
		strcat(fname, "\\");
	
	strcat(fname, "gsXXXXXX");
	mktemp(fname);
	AddMessage("Creating temporary file ");
	AddMessage(fname);
	AddMessage("\n");
	return fopen(fname, "w");
}

BOOL CInstall::MakeLog()
{
	FILE *f, *lf;
	char szFileName[MAXSTR];
	char szLogDir[MAXSTR];
	strcpy(szLogDir, m_szTargetDir);
	strcat(szLogDir, "\\");
	strcat(szLogDir, m_szMainDir);
	strcat(szLogDir, "\\");
	
	strcpy(szFileName, szLogDir);
	strcat(szFileName, UNINSTALL_FILE);
	lf = fopen(szFileName, "w");
	if (lf == (FILE *)NULL) {
		AddMessage("Can't create uninstall log");
		CleanUp();
		return FALSE;
	}
	fputs(szSection, lf);
	fputs("UninstallName\n", lf);
	fputs(m_szUninstallName, lf);
	fputs("\n\n", lf);
	
	if (strlen(m_szRegistryNew) &&
		(f = fopen(m_szRegistryNew, "r")) != (FILE *)NULL) {
		fputs(szSection, lf);
		fputs("RegistryNew\n", lf);
		CopyFileContents(lf, f);
		fputs("\n", lf);
		fclose(f);
		DeleteFile(m_szRegistryNew);
		m_szRegistryNew[0] = '\0';
	}
	
	if (strlen(m_szRegistryOld) &&
		(f = fopen(m_szRegistryOld, "r")) != (FILE *)NULL) {
		fputs(szSection, lf);
		fputs("RegistryOld\n", lf);
		CopyFileContents(lf, f);
		fputs("\n", lf);
		fclose(f);
		DeleteFile(m_szRegistryOld);
		m_szRegistryOld[0] = '\0';
	}
	
	if (strlen(m_szShellNew) &&
		(f = fopen(m_szShellNew, "r")) != (FILE *)NULL) {
		fputs(szSection, lf);
		fputs("ShellNew\n", lf);
		CopyFileContents(lf, f);
		fputs("\n", lf);
		fclose(f);
		DeleteFile(m_szShellNew);
		m_szShellNew[0] = '\0';
	}
	
	if (strlen(m_szShellOld) &&
		(f = fopen(m_szShellOld, "r")) != (FILE *)NULL) {
		fputs(szSection, lf);
		fputs("ShellOld\n", lf);
		CopyFileContents(lf, f);
		fputs("\n", lf);
		fclose(f);
		DeleteFile(m_szShellOld);
		m_szShellOld[0] = '\0';
	}
	
	if (strlen(m_szFileNew) &&
		(f = fopen(m_szFileNew, "r")) != (FILE *)NULL) {
		fputs(szSection, lf);
		fputs("FileNew\n", lf);
		CopyFileContents(lf, f);
		fputs("\n", lf);
		fclose(f);
		DeleteFile(m_szFileNew);
		m_szFileNew[0] = '\0';
	}
	
	fputs(szSection, lf);
	fclose(lf);
	
	return TRUE;
}

BOOL CInstall::GetPrograms(BOOL bUseCommon, char *buf, int buflen)
{
	// Get the directory for the Program menu. This is
	// stored in the Registry under HKEY_CURRENT_USER\Software\
	// Microsoft\Windows\CurrentVersion\Explorer\Shell Folders\Programs.
	LONG rc;
	HKEY hCU;    
	DWORD dwType;    
	ULONG ulSize = buflen;
	HKEY hrkey = HKEY_CURRENT_USER;
	if (bUseCommon)
		hrkey = HKEY_LOCAL_MACHINE;
	if (RegOpenKeyEx(hrkey, 
		"Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\Shell Folders", 
		0,KEY_QUERY_VALUE,      
		&hCU) == ERROR_SUCCESS)    {
		rc = RegQueryValueEx( hCU,        
			bUseCommon ? "Common Programs" : "Programs",        
			NULL,        
			&dwType,
			(unsigned char *)buf,        
			&ulSize);      
		RegCloseKey(hCU);    
		return TRUE;
	}
	return FALSE;
	
#ifdef NOTUSED
	// This is an alternate version, but it needs 
	// Internet Explorer 4.0 with Web Integrated Desktop.
	// It does not work with the standard 
	// Windows 95, Windows NT 4.0, Internet Explorer 3.0, 
	// and Internet Explorer 4.0 without Web Integrated Desktop.
	
	HRESULT rc;
	m_szPrograms[0] = '\0';
	int nFolder = CSIDL_PROGRAMS;
	if (bUseCommon)
		nFolder = CSIDL_COMMON_PROGRAMS;
	
	rc = SHGetSpecialFolderPath(HWND_DESKTOP, m_szPrograms, 
		nFolder, FALSE);
	return (rc == NOERROR);
#endif
	
}

BOOL CInstall::SetAllUsers(BOOL bUseCommon)
{
	m_bUseCommon = bUseCommon;
	return GetPrograms(bUseCommon, m_szPrograms, sizeof(m_szPrograms));
}


//////////////////////////////////////////////////////////////////////