Libc-498.tar.gz

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

diff --git a/stdio/vsnprintf-fbsd.c b/stdio/vsnprintf-fbsd.c
new file mode 100644 (file)
index 0000000..1a24ce3
--- /dev/null
+++ b/stdio/vsnprintf-fbsd.c
@@ -0,0 +1,116 @@
+/*-
+ * Copyright (c) 1990, 1993
+ *     The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Chris Torek.
+ *
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *     This product includes software developed by the University of
+ *     California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)vsnprintf.c        8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD: src/lib/libc/stdio/vsnprintf.c,v 1.22 2003/07/02 07:08:44 jkh Exp $");
+
+#include "xlocale_private.h"
+
+#include <limits.h>
+#include <stdio.h>
+#include "local.h"
+
+int
+vsnprintf(char * __restrict str, size_t n, const char * __restrict fmt,
+    __va_list ap)
+{
+       size_t on;
+       int ret;
+       char dummy[2];
+       FILE f;
+       struct __sFILEX ext;
+
+       on = n;
+       if (n != 0)
+               n--;
+       if (n > INT_MAX)
+               n = INT_MAX;
+       /* Stdio internals do not deal correctly with zero length buffer */
+       if (n == 0) {
+               if (on > 0)
+                       *str = '\0';
+               str = dummy;
+               n = 1;
+       }
+       f._file = -1;
+       f._flags = __SWR | __SSTR;
+       f._bf._base = f._p = (unsigned char *)str;
+       f._bf._size = f._w = n;
+       f._extra = &ext;
+       INITEXTRA(&f);
+       ret = __vfprintf(&f, __current_locale(), fmt, ap);
+       if (on > 0)
+               *f._p = '\0';
+       return (ret);
+}
+
+int
+vsnprintf_l(char * __restrict str, size_t n, locale_t loc,
+    const char * __restrict fmt, __va_list ap)
+{
+       size_t on;
+       int ret;
+       char dummy[2];
+       FILE f;
+       struct __sFILEX ext;
+
+       NORMALIZE_LOCALE(loc);
+       on = n;
+       if (n != 0)
+               n--;
+       if (n > INT_MAX)
+               n = INT_MAX;
+       /* Stdio internals do not deal correctly with zero length buffer */
+       if (n == 0) {
+               if (on > 0)
+                       *str = '\0';
+               str = dummy;
+               n = 1;
+       }
+       f._file = -1;
+       f._flags = __SWR | __SSTR;
+       f._bf._base = f._p = (unsigned char *)str;
+       f._bf._size = f._w = n;
+       f._extra = &ext;
+       INITEXTRA(&f);
+       ret = __vfprintf(&f, loc, fmt, ap);
+       if (on > 0)
+               *f._p = '\0';
+       return (ret);
+}