dlls/crtdll/crtdll_main.c

/*
 * The C RunTime DLL
 * 
 * Implements C run-time functionality as known from UNIX.
 *
 * Copyright 1996,1998 Marcus Meissner
 * Copyright 1996 Jukka Iivonen
 * Copyright 1997,2000 Uwe Bonnes
 * Copyright 2000 Jon Griffiths
 */

/*
Unresolved issues Uwe Bonnes 970904:
- tested with ftp://ftp.remcomp.com/pub/remcomp/lcc-win32.zip, a C-Compiler
 		for Win32, based on lcc, from Jacob Navia
UB 000416:
- probably not thread safe
*/

/* NOTE: This file also implements the wcs* functions. They _ARE_ in 
 * the newer Linux libcs, but use 4 byte wide characters, so are unusable,
 * since we need 2 byte wide characters. - Marcus Meissner, 981031
 */

#include "crtdll.h"
#include <ctype.h>
#define __USE_ISOC9X 1 /* for isfinite */
#include <math.h>
#include <errno.h>
#include <stdlib.h>
#include "ntddk.h"
#include "wingdi.h"
#include "winuser.h"


DEFAULT_DEBUG_CHANNEL(crtdll);


UINT CRTDLL_argc_dll;         /* CRTDLL.23 */
LPSTR *CRTDLL_argv_dll;       /* CRTDLL.24 */
LPSTR  CRTDLL_acmdln_dll;     /* CRTDLL.38 */
UINT CRTDLL_basemajor_dll;    /* CRTDLL.42 */
UINT CRTDLL_baseminor_dll;    /* CRTDLL.43 */
UINT CRTDLL_baseversion_dll;  /* CRTDLL.44 */
UINT CRTDLL_commode_dll;      /* CRTDLL.59 */
LPSTR  CRTDLL_environ_dll;    /* CRTDLL.75 */
UINT CRTDLL_fmode_dll;        /* CRTDLL.104 */
UINT CRTDLL_osmajor_dll;      /* CRTDLL.241 */
UINT CRTDLL_osminor_dll;      /* CRTDLL.242 */
UINT CRTDLL_osmode_dll;       /* CRTDLL.243 */
UINT CRTDLL_osver_dll;        /* CRTDLL.244 */
UINT CRTDLL_osversion_dll;    /* CRTDLL.245 */
UINT CRTDLL_winmajor_dll;     /* CRTDLL.329 */
UINT CRTDLL_winminor_dll;     /* CRTDLL.330 */
UINT CRTDLL_winver_dll;       /* CRTDLL.331 */
INT  CRTDLL_doserrno = 0; 
INT  CRTDLL_errno = 0;
const INT  CRTDLL__sys_nerr = 43;


/*********************************************************************
 *                  CRTDLL_MainInit  (CRTDLL.init)
 */
BOOL WINAPI CRTDLL_Init(HINSTANCE hinstDLL,DWORD fdwReason,LPVOID lpvReserved)
{
	TRACE("(0x%08x,%ld,%p)\n",hinstDLL,fdwReason,lpvReserved);

	if (fdwReason == DLL_PROCESS_ATTACH) {
	  __CRTDLL__init_io();
	}
	return TRUE;
}


/* INTERNAL: Set the crt and dos errno's from the OS error given. */
void __CRTDLL__set_errno(ULONG err)
{
  /* FIXME: not MT safe */
  CRTDLL_doserrno = err;

  switch(err)
  {
#define ERR_CASE(oserr) case oserr:
#define ERR_MAPS(oserr,crterr) case oserr:CRTDLL_errno = crterr;break;
    ERR_CASE(ERROR_ACCESS_DENIED)
    ERR_CASE(ERROR_NETWORK_ACCESS_DENIED)
    ERR_CASE(ERROR_CANNOT_MAKE)
    ERR_CASE(ERROR_SEEK_ON_DEVICE)
    ERR_CASE(ERROR_LOCK_FAILED)
    ERR_CASE(ERROR_FAIL_I24)
    ERR_CASE(ERROR_CURRENT_DIRECTORY)
    ERR_CASE(ERROR_DRIVE_LOCKED)
    ERR_CASE(ERROR_NOT_LOCKED)
    ERR_CASE(ERROR_INVALID_ACCESS)
    ERR_MAPS(ERROR_LOCK_VIOLATION,       EACCES);
    ERR_CASE(ERROR_FILE_NOT_FOUND)
    ERR_CASE(ERROR_NO_MORE_FILES)
    ERR_CASE(ERROR_BAD_PATHNAME)
    ERR_CASE(ERROR_BAD_NETPATH)
    ERR_CASE(ERROR_INVALID_DRIVE)
    ERR_CASE(ERROR_BAD_NET_NAME)
    ERR_CASE(ERROR_FILENAME_EXCED_RANGE)
    ERR_MAPS(ERROR_PATH_NOT_FOUND,       ENOENT);
    ERR_MAPS(ERROR_IO_DEVICE,            EIO);
    ERR_MAPS(ERROR_BAD_FORMAT,           ENOEXEC);
    ERR_MAPS(ERROR_INVALID_HANDLE,       EBADF);
    ERR_CASE(ERROR_OUTOFMEMORY)
    ERR_CASE(ERROR_INVALID_BLOCK)
    ERR_CASE(ERROR_NOT_ENOUGH_QUOTA);
    ERR_MAPS(ERROR_ARENA_TRASHED,        ENOMEM);
    ERR_MAPS(ERROR_BUSY,                 EBUSY);
    ERR_CASE(ERROR_ALREADY_EXISTS)
    ERR_MAPS(ERROR_FILE_EXISTS,          EEXIST);
    ERR_MAPS(ERROR_BAD_DEVICE,           ENODEV);
    ERR_MAPS(ERROR_TOO_MANY_OPEN_FILES,  EMFILE);
    ERR_MAPS(ERROR_DISK_FULL,            ENOSPC);
    ERR_MAPS(ERROR_BROKEN_PIPE,          EPIPE);
    ERR_MAPS(ERROR_POSSIBLE_DEADLOCK,    EDEADLK);
    ERR_MAPS(ERROR_DIR_NOT_EMPTY,        ENOTEMPTY);
    ERR_MAPS(ERROR_BAD_ENVIRONMENT,      E2BIG);
    ERR_CASE(ERROR_WAIT_NO_CHILDREN)
    ERR_MAPS(ERROR_CHILD_NOT_COMPLETE,   ECHILD);
    ERR_CASE(ERROR_NO_PROC_SLOTS)
    ERR_CASE(ERROR_MAX_THRDS_REACHED)
    ERR_MAPS(ERROR_NESTING_NOT_ALLOWED,  EAGAIN);
  default:
    /*  Remaining cases map to EINVAL */
    /* FIXME: may be missing some errors above */
    CRTDLL_errno = EINVAL;
  }
}


/*********************************************************************
 *                  _GetMainArgs  (CRTDLL.022)
 */
LPSTR * __cdecl CRTDLL__GetMainArgs(LPDWORD argc,LPSTR **argv,
                                LPSTR *environ,DWORD flag)
{
        char *cmdline;
        char  **xargv;
	int	xargc,end,last_arg,afterlastspace;
	DWORD	version;

	TRACE("(%p,%p,%p,%ld).\n",
		argc,argv,environ,flag
	);

	if (CRTDLL_acmdln_dll != NULL)
		HeapFree(GetProcessHeap(), 0, CRTDLL_acmdln_dll);

	CRTDLL_acmdln_dll = cmdline = CRTDLL__strdup( GetCommandLineA() );
 	TRACE("got '%s'\n", cmdline);

	version	= GetVersion();
	CRTDLL_osver_dll       = version >> 16;
	CRTDLL_winminor_dll    = version & 0xFF;
	CRTDLL_winmajor_dll    = (version>>8) & 0xFF;
	CRTDLL_baseversion_dll = version >> 16;
	CRTDLL_winver_dll      = ((version >> 8) & 0xFF) + ((version & 0xFF) << 8);
	CRTDLL_baseminor_dll   = (version >> 16) & 0xFF;
	CRTDLL_basemajor_dll   = (version >> 24) & 0xFF;
	CRTDLL_osversion_dll   = version & 0xFFFF;
	CRTDLL_osminor_dll     = version & 0xFF;
	CRTDLL_osmajor_dll     = (version>>8) & 0xFF;

	/* missing threading init */

	end=0;last_arg=0;xargv=NULL;xargc=0;afterlastspace=0;
	while (1)
	{
	    if ((cmdline[end]==' ') || (cmdline[end]=='\0'))
	    {
		if (cmdline[end]=='\0')
		    last_arg=1;
		else
		    cmdline[end]='\0';
		/* alloc xargc + NULL entry */
			xargv=(char**)HeapReAlloc( GetProcessHeap(), 0, xargv,
		                             sizeof(char*)*(xargc+1));
		if (strlen(cmdline+afterlastspace))
		{
		    xargv[xargc] = CRTDLL__strdup(cmdline+afterlastspace);
		    xargc++;
                    if (!last_arg) /* need to seek to the next arg ? */
		    {
			end++;
			while (cmdline[end]==' ')
			    end++;
	}
		    afterlastspace=end;
		}
		else
		{
		    xargv[xargc] = NULL; /* the last entry is NULL */
		    break;
		}
	    }
	    else
		end++;
	}
	CRTDLL_argc_dll	= xargc;
	*argc		= xargc;
	CRTDLL_argv_dll	= xargv;
	*argv		= xargv;

	TRACE("found %d arguments\n",
		CRTDLL_argc_dll);
	CRTDLL_environ_dll = *environ = GetEnvironmentStringsA();
	return environ;
}


/*********************************************************************
 *                  _initterm     (CRTDLL.135)
 */
DWORD __cdecl CRTDLL__initterm(_INITTERMFUN *start,_INITTERMFUN *end)
{
	_INITTERMFUN	*current;

	TRACE("(%p,%p)\n",start,end);
	current=start;
	while (current<end) {
		if (*current) (*current)();
		current++;
	}
	return 0;
}


/*******************************************************************
 *         _global_unwind2  (CRTDLL.129)
 */
void __cdecl CRTDLL__global_unwind2( PEXCEPTION_FRAME frame )
{
    RtlUnwind( frame, 0, NULL, 0 );
}


/*******************************************************************
 *         _local_unwind2  (CRTDLL.173)
 */
void __cdecl CRTDLL__local_unwind2( PEXCEPTION_FRAME endframe, DWORD nr )
{
    TRACE("(%p,%ld)\n",endframe,nr);
}


/*******************************************************************
 *         _setjmp  (CRTDLL.264)
 */
INT __cdecl CRTDLL__setjmp(LPDWORD *jmpbuf)
{
  FIXME(":(%p): stub\n",jmpbuf);
  return 0;
}


/*********************************************************************
 *                  _beep          (CRTDLL.045)
 *
 * Output a tone using the PC speaker.
 *
 * PARAMS
 * freq [in]     Frequency of the tone
 *
 * duration [in] Length of time the tone should sound
 *
 * RETURNS
 * None.
 */
void __cdecl CRTDLL__beep( UINT freq, UINT duration)
{
    TRACE(":Freq %d, Duration %d\n",freq,duration);
    Beep(freq, duration);
}


/*********************************************************************
 *                  rand          (CRTDLL.446)
 */
INT __cdecl CRTDLL_rand()
{
    return (rand() & CRTDLL_RAND_MAX); 
}


/*********************************************************************
 *                  _rotl          (CRTDLL.259)
 */
UINT __cdecl CRTDLL__rotl(UINT x,INT shift)
{
    shift &= 31;
    return (x << shift) | (x >> (32-shift));
}


/*********************************************************************
 *                  _lrotl          (CRTDLL.175)
 */
DWORD __cdecl CRTDLL__lrotl(DWORD x,INT shift)
{
    shift &= 31;
    return (x << shift) | (x >> (32-shift));
}


/*********************************************************************
 *                  _lrotr          (CRTDLL.176)
 */
DWORD __cdecl CRTDLL__lrotr(DWORD x,INT shift)
{
    shift &= 0x1f;
    return (x >> shift) | (x << (32-shift));
}


/*********************************************************************
 *                  _rotr          (CRTDLL.258)
 */
DWORD __cdecl CRTDLL__rotr(UINT x,INT shift)
{
    shift &= 0x1f;
    return (x >> shift) | (x << (32-shift));
}


/*********************************************************************
 *                  vswprintf      (CRTDLL.501)
 */
INT __cdecl CRTDLL_vswprintf( LPWSTR buffer, LPCWSTR spec, va_list args )
{
    return wvsprintfW( buffer, spec, args );
}


/*********************************************************************
 *                  longjmp        (CRTDLL.426)
 */
VOID __cdecl CRTDLL_longjmp(jmp_buf env, int val)
{
    FIXME("CRTDLL_longjmp semistup, expect crash\n");
    longjmp(env, val);
}


/*********************************************************************
 *                  setlocale           (CRTDLL.453)
 */
LPSTR __cdecl CRTDLL_setlocale(INT category,LPCSTR locale)
{
    LPSTR categorystr;

    switch (category) {
    case CRTDLL_LC_ALL: categorystr="LC_ALL";break;
    case CRTDLL_LC_COLLATE: categorystr="LC_COLLATE";break;
    case CRTDLL_LC_CTYPE: categorystr="LC_CTYPE";break;
    case CRTDLL_LC_MONETARY: categorystr="LC_MONETARY";break;
    case CRTDLL_LC_NUMERIC: categorystr="LC_NUMERIC";break;
    case CRTDLL_LC_TIME: categorystr="LC_TIME";break;
    default: categorystr = "UNKNOWN?";break;
    }
    FIXME("(%s,%s),stub!\n",categorystr,locale);
    return "C";
}


/*********************************************************************
 *                  _isctype           (CRTDLL.138)
 */
BOOL __cdecl CRTDLL__isctype(CHAR x,CHAR type)
{
    if ((type & CRTDLL_SPACE) && isspace(x))
        return TRUE;
    if ((type & CRTDLL_PUNCT) && ispunct(x))
        return TRUE;
    if ((type & CRTDLL_LOWER) && islower(x))
        return TRUE;
    if ((type & CRTDLL_UPPER) && isupper(x))
        return TRUE;
    if ((type & CRTDLL_ALPHA) && isalpha(x))
        return TRUE;
    if ((type & CRTDLL_DIGIT) && isdigit(x))
        return TRUE;
    if ((type & CRTDLL_CONTROL) && iscntrl(x))
        return TRUE;
    /* check CRTDLL_LEADBYTE */
    return FALSE;
}


/*********************************************************************
 *                  _fullpath           (CRTDLL.114)
 */
LPSTR __cdecl CRTDLL__fullpath(LPSTR buf, LPCSTR name, INT size)
{
  if (!buf)
  {
      size = 256;
      if(!(buf = CRTDLL_malloc(size))) return NULL;
  }
  if (!GetFullPathNameA( name, size, buf, NULL )) return NULL;
  TRACE("CRTDLL_fullpath got %s\n",buf);
  return buf;
}


/*********************************************************************
 *                  _splitpath           (CRTDLL.279)
 */
VOID __cdecl CRTDLL__splitpath(LPCSTR path, LPSTR drive, LPSTR directory, LPSTR filename, LPSTR extension )
{
  /* drive includes :
     directory includes leading and trailing (forward and backward slashes)
     filename without dot and slashes
     extension with leading dot
     */
  char * drivechar,*dirchar,*namechar;

  TRACE("CRTDLL__splitpath got %s\n",path);

  drivechar  = strchr(path,':');
  dirchar    = strrchr(path,'/');
  namechar   = strrchr(path,'\\');
  dirchar = max(dirchar,namechar);
  if (dirchar)
    namechar   = strrchr(dirchar,'.');
  else
    namechar   = strrchr(path,'.');

  if (drive)
    {
      *drive = 0x00;
      if (drivechar)
      {
          strncat(drive,path,drivechar-path+1);
          path = drivechar+1;
      }
    }
  if (directory)
    {
      *directory = 0x00;
      if (dirchar)
      {
          strncat(directory,path,dirchar-path+1);
          path = dirchar+1;
      }
    }
  if (filename)
    {
      *filename = 0x00;
      if (namechar)
      {
          strncat(filename,path,namechar-path);
          if (extension)
          {
              *extension = 0x00;
              strcat(extension,namechar);
          }
      }
    }

  TRACE("CRTDLL__splitpath found %s %s %s %s\n",drive,directory,filename,extension);
}


/*********************************************************************
 *                  _makepath           (CRTDLL.182)
 */

VOID __cdecl CRTDLL__makepath(LPSTR path, LPCSTR drive,
                              LPCSTR directory, LPCSTR filename,
                              LPCSTR extension )
{
    char ch;
    TRACE("CRTDLL__makepath got %s %s %s %s\n", drive, directory,
          filename, extension);

    if ( !path )
        return;

    path[0] = 0;
    if (drive && drive[0])
    {
        path[0] = drive[0];
        path[1] = ':';
        path[2] = 0;
    }
    if (directory && directory[0])
    {
        strcat(path, directory);
        ch = path[strlen(path)-1];
        if (ch != '/' && ch != '\\')
            strcat(path,"\\");
    }
    if (filename && filename[0])
    {
        strcat(path, filename);
        if (extension && extension[0])
        {
            if ( extension[0] != '.' ) {
                strcat(path,".");
            }
            strcat(path,extension);
        }
    }

    TRACE("CRTDLL__makepath returns %s\n",path);
}


/*********************************************************************
 *                  _errno           (CRTDLL.52)
 * Return the address of the CRT errno (Not the libc errno).
 *
 * BUGS
 * Not MT safe.
 */
LPINT __cdecl CRTDLL__errno( VOID )
{
  return &CRTDLL_errno;
}


/*********************************************************************
 *                  __doserrno       (CRTDLL.26)
 * 
 * Return the address of the DOS errno (holding the last OS error).
 *
 * BUGS
 * Not MT safe.
 */
LPINT __cdecl CRTDLL___doserrno( VOID )
{
  return &CRTDLL_doserrno;
}


/**********************************************************************
 *                  _strerror       (CRTDLL.284)
 *
 * Return a formatted system error message.
 *
 * NOTES
 * The caller does not own the string returned.
 */
extern int sprintf(char *str, const char *format, ...);

LPSTR __cdecl CRTDLL__strerror (LPCSTR err)
{
  static char strerrbuff[256];
  sprintf(strerrbuff,"%s: %s\n",err,CRTDLL_strerror(CRTDLL_errno));
  return strerrbuff;
}


/*********************************************************************
 *                  perror       (CRTDLL.435)
 *
 * Print a formatted system error message to stderr.
 */
VOID __cdecl CRTDLL_perror (LPCSTR err)
{
  char *err_str = CRTDLL_strerror(CRTDLL_errno);
  CRTDLL_fprintf(CRTDLL_stderr,"%s: %s\n",err,err_str);
  CRTDLL_free(err_str);
}
 

/*********************************************************************
 *                  strerror       (CRTDLL.465)
 *
 * Return the text of an error.
 *
 * NOTES
 * The caller does not own the string returned.
 */
extern char *strerror(int errnum); 

LPSTR __cdecl CRTDLL_strerror (INT err)
{
  return strerror(err);
}


/*********************************************************************
 *                  signal           (CRTDLL.455)
 */
LPVOID __cdecl CRTDLL_signal(INT sig, sig_handler_type ptr)
{
    FIXME("(%d %p):stub.\n", sig, ptr);
    return (void*)-1;
}


/*********************************************************************
 *                  _sleep           (CRTDLL.267)
 */
VOID __cdecl CRTDLL__sleep(ULONG timeout)
{
  TRACE("CRTDLL__sleep for %ld milliseconds\n",timeout);
  Sleep((timeout)?timeout:1);
}


/*********************************************************************
 *                  getenv           (CRTDLL.437)
 */
LPSTR __cdecl CRTDLL_getenv(LPCSTR name)
{
     LPSTR environ = GetEnvironmentStringsA();
     LPSTR pp,pos = NULL;
     unsigned int length;

     for (pp = environ; (*pp); pp = pp + strlen(pp) +1)
       {
	 pos =strchr(pp,'=');
	 if (pos)
	   length = pos -pp;
	 else
	   length = strlen(pp);
	 if (!strncmp(pp,name,length)) break;
       }
     if ((pp)&& (pos)) 
       {
	 pp = pos+1;
	 TRACE("got %s\n",pp);
       }
     FreeEnvironmentStringsA( environ );
     return pp;
}


/*********************************************************************
 *                  _except_handler2  (CRTDLL.78)
 */
INT __cdecl CRTDLL__except_handler2 (
	PEXCEPTION_RECORD rec,
	PEXCEPTION_FRAME frame,
	PCONTEXT context,
	PEXCEPTION_FRAME  *dispatcher)
{
	FIXME ("exception %lx flags=%lx at %p handler=%p %p %p stub\n",
	rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress,
	frame->Handler, context, dispatcher);
	return ExceptionContinueSearch;
}


/*********************************************************************
 *                  __isascii           (CRTDLL.028)
 *
 */
INT __cdecl CRTDLL___isascii(INT c)
{
  return isascii(c);
}


/*********************************************************************
 *                  __toascii           (CRTDLL.035)
 *
 */
INT __cdecl CRTDLL___toascii(INT c)
{
  return c & 0x7f;
}


/*********************************************************************
 *                  iswascii           (CRTDLL.404)
 *
 */
INT __cdecl CRTDLL_iswascii(LONG c)
{
  return ((unsigned)c < 0x80);
}


/*********************************************************************
 *                  __iscsym           (CRTDLL.029)
 *
 * Is a character valid in a C identifier (a-Z,0-9,_).
 *
 * PARAMS
 *   c       [I]: Character to check
 *
 * RETURNS
 * Non zero if c is valid as t a C identifier.
 */
INT __cdecl CRTDLL___iscsym(LONG c)
{
  return (isalnum(c) || c == '_');
}


/*********************************************************************
 *                  __iscsymf           (CRTDLL.030)
 *
 * Is a character valid as the first letter in a C identifier (a-Z,_).
 *
 * PARAMS
 *   c [in]  Character to check
 *
 * RETURNS
 *   Non zero if c is valid as the first letter in a C identifier.
 */
INT __cdecl CRTDLL___iscsymf(LONG c)
{
  return (isalpha(c) || c == '_');
}


/*********************************************************************
 *                  _loaddll        (CRTDLL.171)
 *
 * Get a handle to a DLL in memory. The DLL is loaded if it is not already.
 *
 * PARAMS
 * dll [in]  Name of DLL to load.
 *
 * RETURNS
 * Success: A handle to the loaded DLL.
 *
 * Failure: FIXME.
 */
INT __cdecl CRTDLL__loaddll(LPSTR dllname)
{
  return LoadLibraryA(dllname);
}


/*********************************************************************
 *                  _unloaddll        (CRTDLL.313)
 *
 * Free reference to a DLL handle from loaddll().
 *
 * PARAMS
 *   dll [in] Handle to free.
 *
 * RETURNS
 * Success: 0.
 *
 * Failure: Error number.
 */
INT __cdecl CRTDLL__unloaddll(HANDLE dll)
{
  INT err;
  if (FreeLibrary(dll))
    return 0;
  err = GetLastError();
  __CRTDLL__set_errno(err);
  return err;
}


/*********************************************************************
 *                  _lsearch        (CRTDLL.177)
 *
 * Linear search of an array of elements. Adds the item to the array if
 * not found.
 *
 * PARAMS
 *   match [in]      Pointer to element to match
 *   start [in]      Pointer to start of search memory
 *   array_size [in] Length of search array (element count)
 *   elem_size [in]  Size of each element in memory
 *   comp_func [in]  Pointer to comparason function (like qsort()).
 *
 * RETURNS
 *   Pointer to the location where element was found or added.
 */
LPVOID __cdecl CRTDLL__lsearch(LPVOID match,LPVOID start, LPUINT array_size,
                               UINT elem_size, comp_func cf)
{
  UINT size = *array_size;
  if (size)
    do
    {
      if (cf(match, start) == 0)
	return start; /* found */
      start += elem_size;
    } while (--size);

  /* not found, add to end */
  memcpy(start, match, elem_size);
  array_size[0]++;
  return start;
}


/*********************************************************************
 *                  _itow           (CRTDLL.164)
 *
 * Convert an integer to a wide char string.
 */
extern LPSTR  __cdecl _itoa( long , LPSTR , INT); /* ntdll */

WCHAR* __cdecl CRTDLL__itow(INT value,WCHAR* out,INT base)
{
  char buff[64]; /* FIXME: Whats the maximum buffer size for INT_MAX? */

  _itoa(value, buff, base);
  MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED, buff, -1, out, 64);
  return out;
}


/*********************************************************************
 *                  _ltow           (CRTDLL.??)
 *
 * Convert a long to a wide char string.
 */
extern LPSTR  __cdecl _ltoa( long , LPSTR , INT); /* ntdll */

WCHAR* __cdecl CRTDLL__ltow(LONG value,WCHAR* out,INT base)
{
  char buff[64]; /* FIXME: Whats the maximum buffer size for LONG_MAX? */

  _ltoa(value, buff, base);
  MultiByteToWideChar (CP_ACP, MB_PRECOMPOSED, buff, -1, out, 64);
  return out;
}


/*********************************************************************
 *                  _ultow           (CRTDLL.??)
 *
 * Convert an unsigned long to a wide char string.
 */
extern LPSTR  __cdecl _ultoa( long , LPSTR , INT); /* ntdll */

WCHAR* __cdecl CRTDLL__ultow(ULONG value,WCHAR* out,INT base)
{
  char buff[64]; /* FIXME: Whats the maximum buffer size for ULONG_MAX? */

  _ultoa(value, buff, base);
  MultiByteToWideChar (CP_ACP, MB_PRECOMPOSED, buff, -1, out, 64);
  return out;
}


/*********************************************************************
 *                  _toupper           (CRTDLL.489)
 */
CHAR __cdecl CRTDLL__toupper(CHAR c)
{
  return toupper(c);
}


/*********************************************************************
 *                  _tolower           (CRTDLL.490)
 */
CHAR __cdecl CRTDLL__tolower(CHAR c)
{
  return tolower(c);
}


/* FP functions */

/*********************************************************************
 *                  _cabs           (CRTDLL.048)
 *
 * Return the absolue value of a complex number.
 *
 * PARAMS
 *   c [in] Structure containing real and imaginary parts of complex number.
 *
 * RETURNS
 *   Absolute value of complex number (always a positive real number).
 */
double __cdecl CRTDLL__cabs(struct complex c)
{
  return sqrt(c.real * c.real + c.imaginary * c.imaginary);
}


/*********************************************************************
 *                  _chgsign    (CRTDLL.053)
 *
 * Change the sign of an IEEE double.
 *
 * PARAMS
 *   d [in] Number to invert.
 *
 * RETURNS
 *   Number with sign inverted.
 */
double __cdecl CRTDLL__chgsign(double d)
{
  /* FIXME: +-infinity,Nan not tested */
  return -d;
}


/*********************************************************************
 *                  _control87    (CRTDLL.060)
 *
 * Unimplemented. Obsolete. Give it up. Use controlfp(), if you must.
 *
 */
UINT __cdecl CRTDLL__control87(UINT x, UINT y)
{
  /* Will never be supported, no possible targets have an 87/287 FP unit */
  WARN(":Ignoring control87 call, dont trust any FP results!\n");
  return 0;
}


/*********************************************************************
 *                  _controlfp    (CRTDLL.061)
 *
 * Set the state of the floating point unit.
 *
 * PARAMS
 * FIXME:
 *
 * RETURNS
 * None
 *
 * BUGS
 * Unimplemented.
 */
UINT __cdecl CRTDLL__controlfp( UINT x, UINT y)
{
  FIXME(":stub!\n");
  return 0;
}


/*********************************************************************
 *                  _copysign           (CRTDLL.062)
 *
 * Return the number x with the sign of y.
 */
double __cdecl CRTDLL__copysign(double x, double y)
{
  /* FIXME: Behaviour for Nan/Inf etc? */
  if (y < 0.0)
    return x < 0.0 ? x : -x;

  return x < 0.0 ? -x : x;
}


/*********************************************************************
 *                  _finite           (CRTDLL.101)
 *
 * Determine if an IEEE double is finite (i.e. not +/- Infinity).
 *
 * PARAMS
 *   d [in]  Number to check.
 *
 * RETURNS
 *   Non zero if number is finite.
 */
INT __cdecl  CRTDLL__finite(double d)
{
  return (isfinite(d)?1:0); /* See comment for CRTDLL__isnan() */
}


/*********************************************************************
 *                  _fpreset           (CRTDLL.107)
 *
 * Reset the state of the floating point processor.
 * 
 * PARAMS
 *   None.
 *
 * RETURNS
 *   None.
 *
 * BUGS
 * Unimplemented.
 */
VOID __cdecl CRTDLL__fpreset(void)
{
  FIXME(":stub!\n");
}


/*********************************************************************
 *                  _isnan           (CRTDLL.164)
 *
 * Determine if an IEEE double is unrepresentable (NaN).
 *
 * PARAMS
 *   d [in]  Number to check.
 *
 * RETURNS
 *   Non zero if number is NaN.
 */
INT __cdecl  CRTDLL__isnan(double d)
{
  /* some implementations return -1 for true(glibc), crtdll returns 1.
   * Do the same, as the result may be used in calculations.
   */
  return isnan(d)?1:0;
}