--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dcclib/ck2str.c	Tue Mar 10 13:49:58 2009 +0100
@@ -0,0 +1,121 @@
+/* Distributed Checksum Clearinghouse
+ *
+ * Copyright (c) 2008 by Rhyolite Software, LLC
+ *
+ * This agreement is not applicable to any entity which sells anti-spam
+ * solutions to others or provides an anti-spam solution as part of a
+ * security solution sold to other entities, or to a private network
+ * which employs the DCC or uses data provided by operation of the DCC
+ * but does not provide corresponding data to other users.
+ *
+ * Permission to use, copy, modify, and distribute this software without
+ * changes for any purpose with or without fee is hereby granted, provided
+ * that the above copyright notice and this permission notice appear in all
+ * copies and any distributed versions or copies are either unchanged
+ * or not called anything similar to "DCC" or "Distributed Checksum
+ * Clearinghouse".
+ *
+ * Parties not eligible to receive a license under this agreement can
+ * obtain a commercial license to use DCC by contacting Rhyolite Software
+ * at sales@rhyolite.com.
+ *
+ * A commercial license would be for Distributed Checksum and Reputation
+ * Clearinghouse software.  That software includes additional features.  This
+ * free license for Distributed ChecksumClearinghouse Software does not in any
+ * way grant permision to use Distributed Checksum and Reputation Clearinghouse
+ * software
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND RHYOLITE SOFTWARE, LLC DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL RHYOLITE SOFTWARE, LLC
+ * 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.
+ *
+ * Rhyolite Software DCC 1.3.103-1.25 $Revision$
+ */
+
+#include "dcc_defs.h"
+
+char *
+dcc_ck2str(char *buf, u_int buf_len,
+	   DCC_CK_TYPES type, const DCC_SUM sum, u_int32_t extra)
+{
+	u_int32_t n[sizeof(DCC_SUM)+3/4];
+	u_char c;
+	char *p;
+	const char *type_str;
+	char type_buf[32];
+	int i;
+
+	/* checksums other than server-ID declarations are easy */
+	if (type != DCC_CK_SRVR_ID) {
+		memcpy(n, sum, sizeof(n));
+		snprintf(buf, buf_len, "%08x %08x %08x %08x",
+			 (int)ntohl(n[0]), (int)ntohl(n[1]),
+			 (int)ntohl(n[2]), (int)ntohl(n[3]));
+		return buf;
+	}
+
+	/* decode server sanity declarations */
+	if (sum[0] == DCC_CK_SRVR_ID) {
+		if (extra == 0)
+			type_str = "server";
+		else
+			type_str = id2str(type_buf, sizeof(type_buf), extra);
+		snprintf(buf, buf_len, "%s at %d",
+			 type_str, (sum[1]<<8)+sum[2]);
+		return buf;
+	}
+
+	/* decode the string from server-ID declaration */
+	p = buf;
+	if (buf_len == 0)
+		return buf;
+	*p++ = '"';
+	--buf_len;
+	for (i = 0; i < ISZ(DCC_SUM); ++i) {
+		if (buf_len == 0)
+			return buf;
+		c = sum[i];
+		if (c == '\0')
+			break;
+		if (c >= ' ' && c < 0x7f) {
+			/* simple ASCII is easy */
+			*p++ = c;
+			--buf_len;
+			continue;
+		}
+
+		/* convert non-ASCII to an escape sequence */
+		*p++ = '\\';
+		if (--buf_len == 0)
+			return buf;
+		*p++ = '0'+(c>>6);
+		if (--buf_len == 0)
+			return buf;
+		*p++ = '0'+((c>>3) & 7);
+		if (--buf_len == 0)
+			return buf;
+		*p++ = '0'+(c & 7);
+		--buf_len;
+	}
+	*p++ = '"';
+	--buf_len;
+	if (--buf_len != 0)
+		*p = '\0';
+	return buf;
+}
+
+
+
+/* this is not thread safe */
+const char *
+dcc_ck2str_err(DCC_CK_TYPES type, const DCC_SUM sum, u_int32_t extra)
+{
+	static char ck_buf[DCC_CK2STR_LEN];
+
+	return dcc_ck2str(ck_buf, sizeof(ck_buf), type, sum, extra);
+}