Subversion Repositories Kolibri OS

Rev

Blame | Last modification | View Log | RSS feed

  1. /*
  2.  * Copyright (c) 1990 The Regents of the University of California.
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms are permitted
  6.  * provided that the above copyright notice and this paragraph are
  7.  * duplicated in all such forms and that any documentation,
  8.  * advertising materials, and other materials related to such
  9.  * distribution and use acknowledge that the software was developed
  10.  * by the University of California, Berkeley.  The name of the
  11.  * University may not be used to endorse or promote products derived
  12.  * from this software without specific prior written permission.
  13.  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  14.  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  15.  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  16.  */
  17. /* doc in vfwprintf.c */
  18.  
  19. #if defined(LIBC_SCCS) && !defined(lint)
  20. static char sccsid[] = "%W% (Berkeley) %G%";
  21. #endif /* LIBC_SCCS and not lint */
  22.  
  23. #include <_ansi.h>
  24. #include <reent.h>
  25. #include <stdio.h>
  26. #include <wchar.h>
  27. #include <limits.h>
  28. #include <stdarg.h>
  29. #include <errno.h>
  30.  
  31. #include "local.h"
  32.  
  33. int
  34. _DEFUN(_vswprintf_r, (ptr, str, size, fmt, ap),
  35.        struct _reent *ptr _AND
  36.        wchar_t *str          _AND
  37.        size_t size        _AND
  38.        const wchar_t *fmt   _AND
  39.        va_list ap)
  40. {
  41.   int ret;
  42.   FILE f;
  43.  
  44.   if (size > INT_MAX / sizeof (wchar_t))
  45.     {
  46.       ptr->_errno = EOVERFLOW;  /* POSIX extension */
  47.       return EOF;
  48.     }
  49.   f._flags = __SWR | __SSTR;
  50.   f._bf._base = f._p = (unsigned char *) str;
  51.   f._bf._size = f._w = (size > 0 ? (size - 1) * sizeof (wchar_t) : 0);
  52.   f._file = -1;  /* No file. */
  53.   ret = _svfwprintf_r (ptr, &f, fmt, ap);
  54.   /* _svfwprintf_r() does not put in a terminating NUL, so add one if
  55.    * appropriate, which is whenever size is > 0.  _svfwprintf_r() stops
  56.    * after n-1, so always just put at the end.  */
  57.   if (size > 0)  {
  58.     *(wchar_t *)f._p = L'\0';   /* terminate the string */
  59.   }
  60.   if(ret >= size)  {
  61.     /* _svfwprintf_r() returns how many wide characters it would have printed
  62.      * if there were enough space.  Return an error if too big to fit in str,
  63.      * unlike snprintf, which returns the size needed.  */
  64.     ptr->_errno = EOVERFLOW;    /* POSIX extension */
  65.     ret = -1;
  66.   }
  67.   return ret;
  68. }
  69.  
  70. #ifndef _REENT_ONLY
  71.  
  72. int
  73. _DEFUN(vswprintf, (str, size, fmt, ap),
  74.        wchar_t *__restrict str        _AND
  75.        size_t size      _AND
  76.        const wchar_t *__restrict fmt _AND
  77.        va_list ap)
  78. {
  79.   return _vswprintf_r (_REENT, str, size, fmt, ap);
  80. }
  81.  
  82. #endif /* !_REENT_ONLY */
  83.