Move dig(1) and needed DNS libraries into it's own source directory in

usr.bin/dig.

From the beginning when we started to remove unneeded nameserver code,
it was our goal to extract dig functionality from the bind sources,
for everyone's benefit as this is easier to reason about.

In total we removed about 2/3 or over 300.000 lines of code.

We kept the lib/ subdirectory layout but moved the content of bin/ to
the top from the old bind source directory.

Previous sources and history can be found in the src/usr.sbin/bind
Attic.

With & OK deraadt
Proposed directory layout sounds good to sthen

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);
+}