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authorperry <perry@NetBSD.org>1998-08-28 21:33:10 +0000
committerperry <perry@NetBSD.org>1998-08-28 21:33:10 +0000
commit253ef37df2ce9d033a1e7b43de90a464038c85e5 (patch)
tree57926292ffdc956aea5438b3c9c50ab8297cf073 /lib/libc/stdio/vasprintf.c
parent3d5e078fe9a01456afa5952a2aae234d0961468b (diff)
add asprintf and vasprintf, originally written by Todd Miller for OpenBSD
Diffstat (limited to 'lib/libc/stdio/vasprintf.c')
-rw-r--r--lib/libc/stdio/vasprintf.c71
1 files changed, 71 insertions, 0 deletions
diff --git a/lib/libc/stdio/vasprintf.c b/lib/libc/stdio/vasprintf.c
new file mode 100644
index 00000000000..49545f5314c
--- /dev/null
+++ b/lib/libc/stdio/vasprintf.c
@@ -0,0 +1,71 @@
+/* $NetBSD: vasprintf.c,v 1.1 1998/08/28 21:33:11 perry Exp $ */
+
+/*
+ * Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com>
+ * 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.
+ * 3. The name of the author 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 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 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>
+#if defined(LIBC_SCCS) && !defined(lint)
+__RCSID("$NetBSD: vasprintf.c,v 1.1 1998/08/28 21:33:11 perry Exp $");
+#endif /* LIBC_SCCS and not lint */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+
+int
+vasprintf(str, fmt, ap)
+ char **str;
+ const char *fmt;
+ _BSD_VA_LIST_ ap;
+{
+ int ret;
+ FILE f;
+ unsigned char *_base;
+
+ f._file = -1;
+ f._flags = __SWR | __SSTR | __SALC;
+ f._bf._base = f._p = (unsigned char *)malloc(128);
+ if (f._bf._base == NULL) {
+ *str = NULL;
+ errno = ENOMEM;
+ return (-1);
+ }
+ f._bf._size = f._w = 127; /* Leave room for the NULL */
+ ret = vfprintf(&f, fmt, ap);
+ *f._p = '\0';
+ _base = realloc(f._bf._base, f._bf._size + 1);
+ if (_base == NULL) {
+ if (f._bf._base)
+ free(f._bf._base);
+ f._bf._base = NULL;
+ errno = ENOMEM;
+ ret = -1;
+ }
+ f._bf._base = _base;
+ *str = (char *)f._bf._base;
+ return (ret);
+}