/*
 * Windows and DOS version functions
 *
 * Copyright 1997 Marcus Meissner
 * Copyright 1998 Patrik Stridvall
 * Copyright 1998, 2003 Andreas Mohr
 * Copyright 1997, 2003 Alexandre Julliard
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "config.h"
#include "wine/port.h"

#include <string.h>
#include <stdlib.h>
#include <stdarg.h>
#include <stdio.h>
#include "ntstatus.h"
#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "winuser.h"
#include "winreg.h"
#include "winternl.h"
#include "winerror.h"
#include "wine/winbase16.h"
#include "wine/unicode.h"
#include "wine/debug.h"

WINE_DEFAULT_DEBUG_CHANNEL(ver);

/**********************************************************************
 *         parse_dos_version
 *
 * Parse the contents of the Version key.
 */
static WORD parse_dos_version( HKEY hkey )
{
    static const WCHAR DosW[] = {'D','O','S',0};

    UNICODE_STRING valueW;
    int hi, lo;
    char tmp[64], buffer[50];
    KEY_VALUE_PARTIAL_INFORMATION *info = (KEY_VALUE_PARTIAL_INFORMATION *)tmp;
    DWORD count, len;
    WORD ret = 0;

    RtlInitUnicodeString( &valueW, DosW );
    if (!NtQueryValueKey( hkey, &valueW, KeyValuePartialInformation, tmp, sizeof(tmp), &count ))
    {
        RtlUnicodeToMultiByteN( buffer, sizeof(buffer)-1, &len,
                                (WCHAR *)info->Data, info->DataLength );
        buffer[len] = 0;

        if (sscanf( buffer, "%d.%d", &hi, &lo ) == 2) ret = MAKEWORD( lo, hi );
        else MESSAGE("Wrong format for DOS version in config file. Use \"x.xx\"\n");
    }
    return ret;
}


/**********************************************************************
 *         get_dos_version
 */
WORD get_dos_version(void)
{
    OBJECT_ATTRIBUTES attr;
    UNICODE_STRING nameW;
    HKEY hkey, config_key;
    WCHAR buffer[MAX_PATH];
    WORD ret = 0;

    static const WCHAR configW[] = {'M','a','c','h','i','n','e','\\',
                                    'S','o','f','t','w','a','r','e','\\',
                                    'W','i','n','e','\\',
                                    'W','i','n','e','\\',
                                    'C','o','n','f','i','g',0};
    static const WCHAR appdefaultsW[] = {'A','p','p','D','e','f','a','u','l','t','s','\\',0};
    static const WCHAR versionW[] = {'\\','V','e','r','s','i','o','n',0};

    attr.Length = sizeof(attr);
    attr.RootDirectory = 0;
    attr.ObjectName = &nameW;
    attr.Attributes = 0;
    attr.SecurityDescriptor = NULL;
    attr.SecurityQualityOfService = NULL;
    RtlInitUnicodeString( &nameW, configW );

    if (NtOpenKey( &config_key, KEY_ALL_ACCESS, &attr )) return 0;
    attr.RootDirectory = config_key;

    /* open AppDefaults\\appname\\Version key */
    if (GetModuleFileNameW( 0, buffer, sizeof(buffer)/sizeof(WCHAR) ))
    {
        WCHAR *p, *appname, appversion[MAX_PATH+20];

        appname = buffer;
        if ((p = strrchrW( appname, '/' ))) appname = p + 1;
        if ((p = strrchrW( appname, '\\' ))) appname = p + 1;

        strcpyW( appversion, appdefaultsW );
        strcatW( appversion, appname );
        strcatW( appversion, versionW );

        TRACE( "getting version from %s\n", debugstr_w(appversion) );
        RtlInitUnicodeString( &nameW, appversion );

        if (!NtOpenKey( &hkey, KEY_ALL_ACCESS, &attr ))
        {
            ret = parse_dos_version( hkey );
            NtClose( hkey );
        }
    }

    if (!ret)
    {
        TRACE( "getting default version\n" );
        RtlInitUnicodeString( &nameW, versionW + 1 );
        if (!NtOpenKey( &hkey, KEY_ALL_ACCESS, &attr ))
        {
            ret = parse_dos_version( hkey );
            NtClose( hkey );
        }
    }

    NtClose( config_key );
    return ret;
}


/***********************************************************************
 *         GetVersion   (KERNEL.3)
 */
DWORD WINAPI GetVersion16(void)
{
    static WORD dosver, winver;

    if (!dosver)  /* not determined yet */
    {
        RTL_OSVERSIONINFOEXW info;

        info.dwOSVersionInfoSize = sizeof(info);
        if (RtlGetVersion( &info ) != STATUS_SUCCESS) return 0;

        if (info.dwMajorVersion <= 3)
            winver = MAKEWORD( info.dwMajorVersion, info.dwMinorVersion );
        else
            winver = MAKEWORD( 3, 95 );

        switch(info.dwPlatformId)
        {
        case VER_PLATFORM_WIN32s:
            if ((dosver = get_dos_version())) break;  /* got the configured version */

            switch(MAKELONG( info.dwMinorVersion, info.dwMajorVersion ))
            {
            case 0x0200:
                dosver = 0x0303;  /* DOS 3.3 for Windows 2.0 */
                break;
            case 0x0300:
                dosver = 0x0500;  /* DOS 5.0 for Windows 3.0 */
                break;
            default:
                dosver = 0x0616;  /* DOS 6.22 for Windows 3.1 and later */
                break;
            }
            break;
        case VER_PLATFORM_WIN32_WINDOWS:
            /* DOS 8.0 for WinME, 7.0 for Win95/98 */
            if (info.dwMinorVersion >= 90) dosver = 0x0800;
            else dosver = 0x0700;
            break;
        case VER_PLATFORM_WIN32_NT:
            dosver = 0x0500;  /* always DOS 5.0 for NT */
            break;
        }
        TRACE( "DOS %d.%02d Win %d.%02d\n",
               HIBYTE(dosver), LOBYTE(dosver), LOBYTE(winver), HIBYTE(winver) );
    }
    return MAKELONG( winver, dosver );
}


/***********************************************************************
 *         GetVersion   (KERNEL32.@)
 */
DWORD WINAPI GetVersion(void)
{
    RTL_OSVERSIONINFOEXW info;

    info.dwOSVersionInfoSize = sizeof(info);
    if (RtlGetVersion( &info ) != STATUS_SUCCESS) return 0;

    return MAKELONG( MAKEWORD( info.dwMajorVersion, info.dwMinorVersion ),
                     LOWORD(info.dwBuildNumber) | ((info.dwPlatformId ^ 2) << 14) );
}


/***********************************************************************
 *         GetVersionEx   (KERNEL.149)
 */
BOOL16 WINAPI GetVersionEx16(OSVERSIONINFO16 *v)
{
    OSVERSIONINFOA info;

    if (v->dwOSVersionInfoSize < sizeof(OSVERSIONINFO16))
    {
        WARN("wrong OSVERSIONINFO size from app\n");
        return FALSE;
    }

    info.dwOSVersionInfoSize = sizeof(info);
    if (!GetVersionExA( &info )) return FALSE;

    v->dwMajorVersion = info.dwMajorVersion;
    v->dwMinorVersion = info.dwMinorVersion;
    v->dwBuildNumber  = info.dwBuildNumber;
    v->dwPlatformId   = info.dwPlatformId;
    strcpy( v->szCSDVersion, info.szCSDVersion );
    return TRUE;
}


/***********************************************************************
 *         GetVersionExA   (KERNEL32.@)
 */
BOOL WINAPI GetVersionExA(OSVERSIONINFOA *v)
{
    RTL_OSVERSIONINFOEXW infoW;

    if (v->dwOSVersionInfoSize != sizeof(OSVERSIONINFOA) &&
        v->dwOSVersionInfoSize != sizeof(OSVERSIONINFOEXA))
    {
        WARN("wrong OSVERSIONINFO size from app (got: %ld, expected: %d or %d)\n",
                        v->dwOSVersionInfoSize, sizeof(OSVERSIONINFOA),
                        sizeof(OSVERSIONINFOEXA));
        return FALSE;
    }

    infoW.dwOSVersionInfoSize = sizeof(infoW);
    if (RtlGetVersion( &infoW ) != STATUS_SUCCESS) return FALSE;

    v->dwMajorVersion = infoW.dwMajorVersion;
    v->dwMinorVersion = infoW.dwMinorVersion;
    v->dwBuildNumber  = infoW.dwBuildNumber;
    v->dwPlatformId   = infoW.dwPlatformId;
    WideCharToMultiByte( CP_ACP, 0, infoW.szCSDVersion, -1,
                         v->szCSDVersion, sizeof(v->szCSDVersion), NULL, NULL );

    if(v->dwOSVersionInfoSize == sizeof(OSVERSIONINFOEXA))
    {
        LPOSVERSIONINFOEXA vex = (LPOSVERSIONINFOEXA) v;
        vex->wServicePackMajor = infoW.wServicePackMajor;
        vex->wServicePackMinor = infoW.wServicePackMinor;
        vex->wSuiteMask        = infoW.wSuiteMask;
        vex->wProductType      = infoW.wProductType;
    }
    return TRUE;
}


/***********************************************************************
 *         GetVersionExW   (KERNEL32.@)
 */
BOOL WINAPI GetVersionExW( OSVERSIONINFOW *info )
{
    if (info->dwOSVersionInfoSize != sizeof(OSVERSIONINFOW) &&
        info->dwOSVersionInfoSize != sizeof(OSVERSIONINFOEXW))
    {
        WARN("wrong OSVERSIONINFO size from app (got: %ld, expected: %d or %d)\n",
                        info->dwOSVersionInfoSize, sizeof(OSVERSIONINFOW),
                        sizeof(OSVERSIONINFOEXW));
        return FALSE;
    }
    return (RtlGetVersion( (RTL_OSVERSIONINFOEXW *)info ) == STATUS_SUCCESS);
}


/******************************************************************************
 *        VerifyVersionInfoA   (KERNEL32.@)
 */
BOOL WINAPI VerifyVersionInfoA( LPOSVERSIONINFOEXA lpVersionInfo, DWORD dwTypeMask,
                                DWORDLONG dwlConditionMask)
{
    OSVERSIONINFOEXW verW;

    verW.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEXW);
    verW.dwMajorVersion = lpVersionInfo->dwMajorVersion;
    verW.dwMinorVersion = lpVersionInfo->dwMinorVersion;
    verW.dwBuildNumber = lpVersionInfo->dwBuildNumber;
    verW.dwPlatformId = lpVersionInfo->dwPlatformId;
    verW.wServicePackMajor = lpVersionInfo->wServicePackMajor;
    verW.wServicePackMinor = lpVersionInfo->wServicePackMinor;
    verW.wSuiteMask = lpVersionInfo->wSuiteMask;
    verW.wProductType = lpVersionInfo->wProductType;
    verW.wReserved = lpVersionInfo->wReserved;

    return VerifyVersionInfoW(&verW, dwTypeMask, dwlConditionMask);
}


/******************************************************************************
 *        VerifyVersionInfoW   (KERNEL32.@)
 */
BOOL WINAPI VerifyVersionInfoW( LPOSVERSIONINFOEXW lpVersionInfo, DWORD dwTypeMask,
                                DWORDLONG dwlConditionMask)
{
    switch(RtlVerifyVersionInfo( lpVersionInfo, dwTypeMask, dwlConditionMask ))
    {
    case STATUS_INVALID_PARAMETER:
        SetLastError( ERROR_BAD_ARGUMENTS );
        return FALSE;
    case STATUS_REVISION_MISMATCH:
        SetLastError( ERROR_OLD_WIN_VERSION );
        return FALSE;
    }
    return TRUE;
}


/***********************************************************************
 *          GetWinFlags   (KERNEL.132)
 */
DWORD WINAPI GetWinFlags16(void)
{
  static const long cpuflags[5] =
    { WF_CPU086, WF_CPU186, WF_CPU286, WF_CPU386, WF_CPU486 };
  SYSTEM_INFO si;
  OSVERSIONINFOA ovi;
  DWORD result;

  GetSystemInfo(&si);

  /* There doesn't seem to be any Pentium flag.  */
  result = cpuflags[min(si.wProcessorLevel, 4)] | WF_ENHANCED | WF_PMODE | WF_80x87 | WF_PAGING;
  if (si.wProcessorLevel >= 4) result |= WF_HASCPUID;
  ovi.dwOSVersionInfoSize = sizeof(ovi);
  GetVersionExA(&ovi);
  if (ovi.dwPlatformId == VER_PLATFORM_WIN32_NT)
      result |= WF_WIN32WOW; /* undocumented WF_WINNT */
  return result;
}


#if 0
/* Not used at this time. This is here for documentation only */

/* WINDEBUGINFO flags values */
#define WDI_OPTIONS         0x0001
#define WDI_FILTER          0x0002
#define WDI_ALLOCBREAK      0x0004

/* dwOptions values */
#define DBO_CHECKHEAP       0x0001
#define DBO_BUFFERFILL      0x0004
#define DBO_DISABLEGPTRAPPING 0x0010
#define DBO_CHECKFREE       0x0020

#define DBO_SILENT          0x8000

#define DBO_TRACEBREAK      0x2000
#define DBO_WARNINGBREAK    0x1000
#define DBO_NOERRORBREAK    0x0800
#define DBO_NOFATALBREAK    0x0400
#define DBO_INT3BREAK       0x0100

/* DebugOutput flags values */
#define DBF_TRACE           0x0000
#define DBF_WARNING         0x4000
#define DBF_ERROR           0x8000
#define DBF_FATAL           0xc000

/* dwFilter values */
#define DBF_KERNEL          0x1000
#define DBF_KRN_MEMMAN      0x0001
#define DBF_KRN_LOADMODULE  0x0002
#define DBF_KRN_SEGMENTLOAD 0x0004
#define DBF_USER            0x0800
#define DBF_GDI             0x0400
#define DBF_MMSYSTEM        0x0040
#define DBF_PENWIN          0x0020
#define DBF_APPLICATION     0x0008
#define DBF_DRIVER          0x0010

#endif /* NOLOGERROR */


/***********************************************************************
 *          GetWinDebugInfo   (KERNEL.355)
 */
BOOL16 WINAPI GetWinDebugInfo16(WINDEBUGINFO16 *lpwdi, UINT16 flags)
{
    FIXME("(%8lx,%d): stub returning 0\n",
          (unsigned long)lpwdi, flags);
    /* 0 means not in debugging mode/version */
    /* Can this type of debugging be used in wine ? */
    /* Constants: WDI_OPTIONS WDI_FILTER WDI_ALLOCBREAK */
    return 0;
}


/***********************************************************************
 *          SetWinDebugInfo   (KERNEL.356)
 */
BOOL16 WINAPI SetWinDebugInfo16(WINDEBUGINFO16 *lpwdi)
{
    FIXME("(%8lx): stub returning 0\n", (unsigned long)lpwdi);
    /* 0 means not in debugging mode/version */
    /* Can this type of debugging be used in wine ? */
    /* Constants: WDI_OPTIONS WDI_FILTER WDI_ALLOCBREAK */
    return 0;
}


/***********************************************************************
 *           K329                    (KERNEL.329)
 *
 * TODO:
 * Should fill lpBuffer only if DBO_BUFFERFILL has been set by SetWinDebugInfo()
 */
void WINAPI DebugFillBuffer(LPSTR lpBuffer, WORD wBytes)
{
        memset(lpBuffer, DBGFILL_BUFFER, wBytes);
}

/***********************************************************************
 *           DiagQuery                          (KERNEL.339)
 *
 * returns TRUE if Win called with "/b" (bootlog.txt)
 */
BOOL16 WINAPI DiagQuery16(void)
{
        /* perhaps implement a Wine "/b" command line flag sometime ? */
        return FALSE;
}

/***********************************************************************
 *           DiagOutput                         (KERNEL.340)
 *
 * writes a debug string into <windir>\bootlog.txt
 */
void WINAPI DiagOutput16(LPCSTR str)
{
        /* FIXME */
        DPRINTF("DIAGOUTPUT:%s\n", debugstr_a(str));
}