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99 lines
3.0 KiB
C
99 lines
3.0 KiB
C
/*
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* Copyright 2014 Freie Universität Berlin
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/*
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* Header file for serial number arithmetics [RFC1982]
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*/
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#ifndef _SIXLOWPAN_SERIALNUMBER_H
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#define _SIXLOWPAN_SERIALNUMBER_H
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef enum serial_comp_res_t {
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LESS = 0,
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EQUAL = 1,
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GREATER = 2,
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UNDEF = 3,
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} serial_comp_res_t;
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/**
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* @brief Addition for 8-bit unsigned integers in serial number
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* arithmetics (corresponding RFC1982 section 3.1).
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* @param[in] s first summand in [0 .. 2^8 - 1].
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* @param[in] n second summand in [0 .. 2^7 - 1].
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* @return sum corresponding RFC1982 section 3.1 if n in [0 .. 2^7 - 1] or
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* -1 if n not in [0 .. 2^7 - 1].
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**/
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int serial_add8(uint8_t s, uint8_t n);
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/**
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* @brief Addition for 16-bit unsigned integers in serial number
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* arithmetics (corresponding RFC1982 section 3.1).
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* @param[in] s first summand in [0 .. 2^16 - 1].
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* @param[in] n second summand in [0 .. 2^15 - 1].
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* @return sum corresponding RFC1982 section 3.1 if n in [0 .. 2^15 - 1] or
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* -1 if n not in [0 .. 2^15 - 1].
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**/
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int serial_add16(uint16_t s, uint16_t n);
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/**
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* @brief Addition for 32-bit unsigned integers in serial number
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* arithmetics (corresponding RFC1982 section 3.1).
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* @param[in] s first summand in [0 .. 2^32 - 1].
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* @param[in] n second summand in [0 .. 2^31 - 1].
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* @return sum corresponding RFC1982 section 3.1 if n in [0 .. 2^31 - 1] or
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* -1 if n not in [0 .. 2^31 - 1].
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**/
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int serial_add32(uint32_t s, uint32_t n);
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/**
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* @brief Comparison of 8-bit unsigned integers in serial number
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* arithmetics (corresponding RFC1982 section 3.2).
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* @param[in] s1 first argument.
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* @param[in] s2 second argument.
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* @return LESS if s1 < s2.
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* EQUAL if s1 = s2.
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* GREATER if s1 > s2.
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* else UNDEF (see RFC1982 section 3.2).
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**/
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serial_comp_res_t serial_comp8(uint8_t s1, uint8_t s2);
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/**
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* @brief Comparison of 16-bit unsigned integers in serial number
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* arithmetics (corresponding RFC1982 section 3.2).
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* @param[in] s1 first argument.
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* @param[in] s2 second argument.
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* @return LESS if s1 < s2.
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* EQUAL if s1 = s2.
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* GREATER if s1 > s2.
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* else UNDEF (see RFC1982 section 3.2).
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**/
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serial_comp_res_t serial_comp16(uint16_t s1, uint16_t s2);
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/**
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* @brief Comparison of 32-bit unsigned integers in serial number
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* arithmetics (corresponding RFC1982 section 3.2).
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* @param[in] s1 first argument.
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* @param[in] s2 second argument.
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* @return LESS if s1 < s2.
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* EQUAL if s1 = s2.
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* GREATER if s1 > s2.
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* else UNDEF (see RFC1982 section 3.2).
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**/
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serial_comp_res_t serial_comp32(uint32_t s1, uint32_t s2);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SIXLOWPAN_SERIALNUMBER_H*/
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