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diff --git a/contrib/bind9/lib/isc/include/isc/base64.h b/contrib/bind9/lib/isc/include/isc/base64.h
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+++ b/contrib/bind9/lib/isc/include/isc/base64.h
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+/*
+ * Copyright (C) 2004, 2005  Internet Systems Consortium, Inc. ("ISC")
+ * Copyright (C) 1999-2001  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.
+ */
+
+/* $Id: base64.h,v 1.16.18.2 2005/04/29 00:16:53 marka Exp $ */
+
+#ifndef ISC_BASE64_H
+#define ISC_BASE64_H 1
+
+/*! \file */
+
+#include <isc/lang.h>
+#include <isc/types.h>
+
+ISC_LANG_BEGINDECLS
+
+/***
+ *** Functions
+ ***/
+
+isc_result_t
+isc_base64_totext(isc_region_t *source, int wordlength,
+		  const char *wordbreak, isc_buffer_t *target);
+/*!<
+ * \brief Convert data into base64 encoded text.
+ *
+ * Notes:
+ *\li	The base64 encoded text in 'target' will be divided into
+ *	words of at most 'wordlength' characters, separated by
+ * 	the 'wordbreak' string.  No parentheses will surround
+ *	the text.
+ *
+ * Requires:
+ *\li	'source' is a region containing binary data
+ *\li	'target' is a text buffer containing available space
+ *\li	'wordbreak' points to a null-terminated string of
+ *		zero or more whitespace characters
+ *
+ * Ensures:
+ *\li	target will contain the base64 encoded version of the data
+ *	in source.  The 'used' pointer in target will be advanced as
+ *	necessary.
+ */
+
+isc_result_t
+isc_base64_decodestring(const char *cstr, isc_buffer_t *target);
+/*!<
+ * \brief Decode a null-terminated base64 string.
+ *
+ * Requires:
+ *\li	'cstr' is non-null.
+ *\li	'target' is a valid buffer.
+ *
+ * Returns:
+ *\li	#ISC_R_SUCCESS	-- the entire decoded representation of 'cstring'
+ *			   fit in 'target'.
+ *\li	#ISC_R_BADBASE64 -- 'cstr' is not a valid base64 encoding.
+ *
+ * 	Other error returns are any possible error code from:
+ *\li		isc_lex_create(),
+ *\li		isc_lex_openbuffer(),
+ *\li		isc_base64_tobuffer().
+ */
+
+isc_result_t
+isc_base64_tobuffer(isc_lex_t *lexer, isc_buffer_t *target, int length);
+/*!<
+ * \brief Convert base64 encoded text from a lexer context into data.
+ *
+ * Requires:
+ *\li	'lex' is a valid lexer context
+ *\li	'target' is a buffer containing binary data
+ *\li	'length' is an integer
+ *
+ * Ensures:
+ *\li	target will contain the data represented by the base64 encoded
+ *	string parsed by the lexer.  No more than length bytes will be read,
+ *	if length is positive.  The 'used' pointer in target will be
+ *	advanced as necessary.
+ */
+
+
+
+ISC_LANG_ENDDECLS
+
+#endif /* ISC_BASE64_H */