Libc-498.tar.gz

[apple/libc.git] / stdio / ungetwc-fbsd.c

diff --git a/stdio/ungetwc-fbsd.c b/stdio/ungetwc-fbsd.c
new file mode 100644 (file)
index 0000000..f221940
--- /dev/null
+++ b/stdio/ungetwc-fbsd.c
@@ -0,0 +1,92 @@
+/*-
+ * Copyright (c) 2002-2004 Tim J. Robbins.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD: src/lib/libc/stdio/ungetwc.c,v 1.9 2004/07/20 08:27:27 tjr Exp $");
+
+#include "xlocale_private.h"
+
+#include "namespace.h"
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <wchar.h>
+#include "un-namespace.h"
+#include "libc_private.h"
+#include "local.h"
+#include "mblocal.h"
+
+/*
+ * Non-MT-safe version.
+ */
+wint_t
+__ungetwc(wint_t wc, FILE *fp, locale_t loc)
+{
+       char buf[MB_LEN_MAX];
+       size_t len;
+
+       if (wc == WEOF)
+               return (WEOF);
+       if ((len = loc->__lc_ctype->__wcrtomb(buf, wc, &fp->_extra->mbstate, loc)) == (size_t)-1) {
+               fp->_flags |= __SERR;
+               return (WEOF);
+       }
+       while (len-- != 0)
+               if (__ungetc((unsigned char)buf[len], fp) == EOF)
+                       return (WEOF);
+
+       return (wc);
+}
+
+/*
+ * MT-safe version.
+ */
+wint_t
+ungetwc(wint_t wc, FILE *fp)
+{
+       wint_t r;
+
+       FLOCKFILE(fp);
+       ORIENT(fp, 1);
+       r = __ungetwc(wc, fp, __current_locale());
+       FUNLOCKFILE(fp);
+
+       return (r);
+}
+
+wint_t
+ungetwc_l(wint_t wc, FILE *fp, locale_t loc)
+{
+       wint_t r;
+
+       NORMALIZE_LOCALE(loc);
+       FLOCKFILE(fp);
+       ORIENT(fp, 1);
+       r = __ungetwc(wc, fp, loc);
+       FUNLOCKFILE(fp);
+
+       return (r);
+}