1 files changed, 79 insertions, 0 deletions
diff --git a/usr.bin/dig/lib/isc/parseint.c b/usr.bin/dig/lib/isc/parseint.c
new file mode 100644
index 00000000000..88bfe8f15a2
--- /dev/null
+++ b/usr.bin/dig/lib/isc/parseint.c
@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * Permission to use, copy, modify, and/or 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 ISC DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS.  IN NO EVENT SHALL ISC 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.
+ */
+
+/* $Id: parseint.c,v 1.1 2020/02/07 09:58:54 florian Exp $ */
+
+/*! \file */
+
+
+
+#include <ctype.h>
+#include <errno.h>
+#include <limits.h>
+#include <stdlib.h>
+
+#include <isc/parseint.h>
+#include <isc/result.h>
+
+
+isc_result_t
+isc_parse_uint32(uint32_t *uip, const char *string, int base) {
+	unsigned long n;
+	uint32_t r;
+	char *e;
+	if (! isalnum((unsigned char)(string[0])))
+		return (ISC_R_BADNUMBER);
+	errno = 0;
+	n = strtoul(string, &e, base);
+	if (*e != '\0')
+		return (ISC_R_BADNUMBER);
+	/*
+	 * Where long is 64 bits we need to convert to 32 bits then test for
+	 * equality.  This is a no-op on 32 bit machines and a good compiler
+	 * will optimise it away.
+	 */
+	r = (uint32_t)n;
+	if ((n == ULONG_MAX && errno == ERANGE) || (n != (unsigned long)r))
+		return (ISC_R_RANGE);
+	*uip = r;
+	return (ISC_R_SUCCESS);
+}
+
+isc_result_t
+isc_parse_uint16(uint16_t *uip, const char *string, int base) {
+	uint32_t val;
+	isc_result_t result;
+	result = isc_parse_uint32(&val, string, base);
+	if (result != ISC_R_SUCCESS)
+		return (result);
+	if (val > 0xFFFF)
+		return (ISC_R_RANGE);
+	*uip = (uint16_t) val;
+	return (ISC_R_SUCCESS);
+}
+
+isc_result_t
+isc_parse_uint8(uint8_t *uip, const char *string, int base) {
+	uint32_t val;
+	isc_result_t result;
+	result = isc_parse_uint32(&val, string, base);
+	if (result != ISC_R_SUCCESS)
+		return (result);
+	if (val > 0xFF)
+		return (ISC_R_RANGE);
+	*uip = (uint8_t) val;
+	return (ISC_R_SUCCESS);
+}