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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [newlib/] [libc/] [stdio/] [vswprintf.c] - Rev 207
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/* * Copyright (c) 1990 The Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms are permitted * provided that the above copyright notice and this paragraph are * duplicated in all such forms and that any documentation, * advertising materials, and other materials related to such * distribution and use acknowledge that the software was developed * by the University of California, Berkeley. The name of the * University may not be used to endorse or promote products derived * from this software without specific prior written permission. * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. */ /* doc in vfwprintf.c */ #if defined(LIBC_SCCS) && !defined(lint) static char sccsid[] = "%W% (Berkeley) %G%"; #endif /* LIBC_SCCS and not lint */ #include <_ansi.h> #include <reent.h> #include <stdio.h> #include <wchar.h> #include <limits.h> #include <stdarg.h> #include <errno.h> #include "local.h" int _DEFUN(_vswprintf_r, (ptr, str, size, fmt, ap), struct _reent *ptr _AND wchar_t *str _AND size_t size _AND const wchar_t *fmt _AND va_list ap) { int ret; FILE f; if (size > INT_MAX / sizeof (wchar_t)) { ptr->_errno = EOVERFLOW; /* POSIX extension */ return EOF; } f._flags = __SWR | __SSTR; f._bf._base = f._p = (unsigned char *) str; f._bf._size = f._w = (size > 0 ? (size - 1) * sizeof (wchar_t) : 0); f._file = -1; /* No file. */ ret = _svfwprintf_r (ptr, &f, fmt, ap); /* _svfwprintf_r() does not put in a terminating NUL, so add one if * appropriate, which is whenever size is > 0. _svfwprintf_r() stops * after n-1, so always just put at the end. */ if (size > 0) { *(wchar_t *)f._p = L'\0'; /* terminate the string */ } if(ret >= size) { /* _svfwprintf_r() returns how many wide characters it would have printed * if there were enough space. Return an error if too big to fit in str, * unlike snprintf, which returns the size needed. */ ptr->_errno = EOVERFLOW; /* POSIX extension */ ret = -1; } return ret; } #ifndef _REENT_ONLY int _DEFUN(vswprintf, (str, size, fmt, ap), wchar_t *str _AND size_t size _AND const wchar_t *fmt _AND va_list ap) { return _vswprintf_r (_REENT, str, size, fmt, ap); } #endif /* !_REENT_ONLY */