Libc-262.tar.gz

[apple/libc.git] / stdio / asprintf.c

diff --git a/stdio/asprintf.c b/stdio/asprintf.c
new file mode 100644 (file)
index 0000000..e0da796
--- /dev/null
+++ b/stdio/asprintf.c
@@ -0,0 +1,81 @@
+/*     $OpenBSD: asprintf.c,v 1.4 1998/06/21 22:13:46 millert 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.
+ */
+
+#if defined(LIBC_RCS) && !defined(lint)
+static char rcsid[] = "$FreeBSD: src/lib/libc/stdio/asprintf.c,v 1.6 1999/08/28 00:00:55 peter Exp $";
+#endif /* LIBC_RCS and not lint */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#if __STDC__
+#include <stdarg.h>
+#else
+#include <varargs.h>
+#endif
+
+int
+#if __STDC__
+asprintf(char **str, char const *fmt, ...)
+#else
+asprintf(str, fmt, va_alist)
+       char **str;
+       const char *fmt;
+       va_dcl
+#endif
+{
+       int ret;
+       va_list ap;
+       FILE f;
+
+#if __STDC__
+       va_start(ap, fmt);
+#else
+       va_start(ap);
+#endif
+       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';
+       va_end(ap);
+       f._bf._base = reallocf(f._bf._base, f._bf._size + 1);
+       if (f._bf._base == NULL) {
+               errno = ENOMEM;
+               ret = -1;
+       }
+       *str = (char *)f._bf._base;
+       return (ret);
+}