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Diffstat (limited to 'lib/isc/include/isc/hex.h')
-rw-r--r-- | lib/isc/include/isc/hex.h | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/lib/isc/include/isc/hex.h b/lib/isc/include/isc/hex.h new file mode 100644 index 0000000..d5f714e --- /dev/null +++ b/lib/isc/include/isc/hex.h @@ -0,0 +1,98 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * 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 https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \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 + * `target`. If 'length' is non-negative, it is the expected number of + * encoded octets to convert. + * + * If 'length' is -1 then 0 or more encoded octets are expected. + * If 'length' is -2 then 1 or more encoded octets are expected. + * + * Returns: + *\li #ISC_R_BADHEX -- invalid hex encoding + *\li #ISC_R_UNEXPECTEDEND: the text does not contain the expected + * number of encoded octets. + * + * Requires: + *\li 'lexer' is a valid lexer context + *\li 'target' is a buffer containing binary data + *\li 'length' is -2, -1, or non-negative + * + * Ensures: + *\li target will contain the data represented by the hex encoded + * string parsed by the lexer. No more than `length` octets will + * be read, if `length` is non-negative. The 'used' pointer in + * 'target' will be advanced as necessary. + */ + +ISC_LANG_ENDDECLS |