1 files changed, 119 insertions, 0 deletions
diff --git a/lib/bind/isc/hex.c b/lib/bind/isc/hex.c
new file mode 100644
index 0000000..e43be4f
--- /dev/null
+++ b/lib/bind/isc/hex.c
@@ -0,0 +1,119 @@
+/*
+ * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
+ * Copyright (c) 2001 by Internet Software Consortium.
+ *
+ * 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 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.
+ */
+
+#include <port_before.h>
+#include <ctype.h>
+#include <stdio.h>
+#include <string.h>
+#include <isc/misc.h>
+#include <port_after.h>
+
+static const char hex[17] = "0123456789abcdef";
+
+int
+isc_gethexstring(unsigned char *buf, size_t len, int count, FILE *fp,
+		 int *multiline)
+{
+	int c, n;
+	unsigned char x;
+	char *s;
+	int result = count;
+	
+	x = 0; /*%< silence compiler */
+	n = 0;
+	while (count > 0) {
+		c = fgetc(fp);
+
+		if ((c == EOF) ||
+		    (c == '\n' && !*multiline) ||
+		    (c == '(' && *multiline) ||
+		    (c == ')' && !*multiline))
+			goto formerr;
+		/* comment */
+		if (c == ';') {
+			do {
+				c = fgetc(fp);
+			} while (c != EOF && c != '\n');
+			if (c == '\n' && *multiline)
+				continue;
+			goto formerr;
+		}
+		/* white space */
+		if (c == ' ' || c == '\t' || c == '\n' || c == '\r')
+			continue;
+		/* multiline */
+		if ('(' == c || c == ')') {
+			*multiline = (c == '(' /*)*/);
+			continue;
+		}
+		if ((s = strchr(hex, tolower(c))) == NULL)
+			goto formerr;
+		x = (x<<4) | (s - hex);
+		if (++n == 2) {
+			if (len > 0U) {
+				*buf++ = x;
+				len--;
+			} else
+				result = -1;
+			count--;
+			n = 0;
+		}
+	}
+	return (result);
+
+ formerr:
+	if (c == '\n')
+		ungetc(c, fp);
+	return (-1);
+}
+
+void
+isc_puthexstring(FILE *fp, const unsigned char *buf, size_t buflen,
+		 size_t len1, size_t len2, const char *sep)
+{
+	size_t i = 0;
+
+	if (len1 < 4U)
+		len1 = 4;
+	if (len2 < 4U)
+		len2 = 4;
+	while (buflen > 0U) {
+		fputc(hex[(buf[0]>>4)&0xf], fp);
+		fputc(hex[buf[0]&0xf], fp);
+		i += 2;
+		buflen--;
+		buf++;
+		if (i >= len1 && sep != NULL) {
+			fputs(sep, fp);
+			i = 0;
+			len1 = len2;
+		}
+	}
+}
+
+void
+isc_tohex(const unsigned char *buf, size_t buflen, char *t) {
+	while (buflen > 0U) {
+		*t++ = hex[(buf[0]>>4)&0xf];
+		*t++ = hex[buf[0]&0xf];
+		buf++;
+		buflen--;
+	}
+	*t = '\0';
+}
+
+/*! \file */