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/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
#ifndef ISC_HEX_H
#define ISC_HEX_H 1
/*! \file isc/hex.h */
#include <isc/lang.h>
#include <isc/types.h>
ISC_LANG_BEGINDECLS
/***
*** Functions
***/
isc_result_t
isc_hex_totext(isc_region_t *source, int wordlength,
const char *wordbreak, isc_buffer_t *target);
/*!<
* \brief Convert data into hex encoded text.
*
* Notes:
*\li The hex 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 hex encoded version of the data
* in source. The 'used' pointer in target will be advanced as
* necessary.
*/
isc_result_t
isc_hex_decodestring(const char *cstr, isc_buffer_t *target);
/*!<
* \brief Decode a null-terminated hex 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_BADHEX -- 'cstr' is not a valid hex encoding.
*
* Other error returns are any possible error code from:
* isc_lex_create(),
* isc_lex_openbuffer(),
* isc_hex_tobuffer().
*/
isc_result_t
isc_hex_tobuffer(isc_lex_t *lexer, isc_buffer_t *target, int length);
/*!<
* \brief Convert hex 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 hex 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_HEX_H */