From 797f5f15358d4c8b5d139e9695af908f64130909 Mon Sep 17 00:00:00 2001
From: tedu <>
Date: Mon, 3 May 2004 17:09:24 +0000
Subject: strtonum, a nicer version of strtoll, by millert and myself. ok
 deraadt@ millert@

---
 src/lib/libc/stdlib/strtonum.c | 74 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 src/lib/libc/stdlib/strtonum.c

(limited to 'src/lib/libc/stdlib/strtonum.c')

diff --git a/src/lib/libc/stdlib/strtonum.c b/src/lib/libc/stdlib/strtonum.c
new file mode 100644
index 0000000000..9ac0d34ee0
--- /dev/null
+++ b/src/lib/libc/stdlib/strtonum.c
@@ -0,0 +1,74 @@
+/* $OpenBSD: strtonum.c,v 1.1 2004/05/03 17:09:24 tedu Exp $ */
+/*
+ * Copyright (c) 2004 Ted Unangst and Todd Miller
+ * All rights reserved.
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <errno.h>
+#include <limits.h>
+#include <stdlib.h>
+
+#define INVALID 	1
+#define TOOSMALL 	2
+#define TOOLARGE 	3
+
+unsigned long long
+strtonum(const char *numstr, long long minval, unsigned long long maxval,
+    const char **errstrp)
+{
+	unsigned long long ull;
+	char *ep;
+	int error;
+	struct errval {
+		const char *errstr;
+		int errno;
+	} ev[4] = {
+		{ NULL,		0 },
+		{ "invalid",	EINVAL },
+		{ "too small",	ERANGE },
+		{ "too large",	ERANGE },
+	};
+
+	ev[0].errno = errno;
+	errno = 0;
+	error = 0;
+	ull = 0;
+	if (minval > maxval || maxval < minval ||
+	    (minval < 0 && maxval > LLONG_MAX))
+		error = INVALID;
+	else if (minval >= 0) {
+		ull = strtoull(numstr, &ep, 10);
+		if (numstr == ep || *ep != '\0')
+			error = INVALID;
+		else if ((ull == ULLONG_MAX && errno == ERANGE) || ull > maxval)
+			error = TOOLARGE;
+	} else {
+		long long ll = strtoll(numstr, &ep, 10);
+		if (numstr == ep || *ep != '\0')
+			error = INVALID;
+		else if ((ll == LLONG_MIN && errno == ERANGE) || ll < minval)
+			error = TOOSMALL;
+		else if ((ll == LLONG_MAX && errno == ERANGE) || ll > maxval)
+			error = TOOLARGE;
+		ull = (unsigned long long)ll;
+	}
+	if (errstrp != NULL)
+		*errstrp = ev[error].errstr;
+	errno = ev[error].errno;
+	if (error)
+		ull = 0;
+
+	return (ull);
+}
-- 
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