| /* dtls -- a very basic DTLS implementation |
| * |
| * Copyright (C) 2011 Olaf Bergmann <bergmann@tzi.org> |
| * |
| * Permission is hereby granted, free of charge, to any person |
| * obtaining a copy of this software and associated documentation |
| * files (the "Software"), to deal in the Software without |
| * restriction, including without limitation the rights to use, copy, |
| * modify, merge, publish, distribute, sublicense, and/or sell copies |
| * of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be |
| * included in all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| */ |
| |
| #ifndef _DTLS_NUMERIC_H_ |
| #define _DTLS_NUMERIC_H_ |
| |
| #include <stdint.h> |
| |
| #ifndef min |
| #define min(A,B) ((A) <= (B) ? (A) : (B)) |
| #endif |
| |
| #ifndef max |
| #define max(A,B) ((A) < (B) ? (B) : (A)) |
| #endif |
| |
| /* this one is for consistency... */ |
| static inline int dtls_int_to_uint8(unsigned char *field, uint8_t value) |
| { |
| field[0] = value & 0xff; |
| return 1; |
| } |
| |
| static inline int dtls_int_to_uint16(unsigned char *field, uint16_t value) |
| { |
| field[0] = (value >> 8) & 0xff; |
| field[1] = value & 0xff; |
| return 2; |
| } |
| |
| static inline int dtls_int_to_uint24(unsigned char *field, uint32_t value) |
| { |
| field[0] = (value >> 16) & 0xff; |
| field[1] = (value >> 8) & 0xff; |
| field[2] = value & 0xff; |
| return 3; |
| } |
| |
| static inline int dtls_int_to_uint32(unsigned char *field, uint32_t value) |
| { |
| field[0] = (value >> 24) & 0xff; |
| field[1] = (value >> 16) & 0xff; |
| field[2] = (value >> 8) & 0xff; |
| field[3] = value & 0xff; |
| return 4; |
| } |
| |
| static inline int dtls_int_to_uint48(unsigned char *field, uint64_t value) |
| { |
| field[0] = (value >> 40) & 0xff; |
| field[1] = (value >> 32) & 0xff; |
| field[2] = (value >> 24) & 0xff; |
| field[3] = (value >> 16) & 0xff; |
| field[4] = (value >> 8) & 0xff; |
| field[5] = value & 0xff; |
| return 6; |
| } |
| |
| static inline int dtls_int_to_uint64(unsigned char *field, uint64_t value) |
| { |
| field[0] = (value >> 56) & 0xff; |
| field[1] = (value >> 48) & 0xff; |
| field[2] = (value >> 40) & 0xff; |
| field[3] = (value >> 32) & 0xff; |
| field[4] = (value >> 24) & 0xff; |
| field[5] = (value >> 16) & 0xff; |
| field[6] = (value >> 8) & 0xff; |
| field[7] = value & 0xff; |
| return 8; |
| } |
| |
| static inline uint8_t dtls_uint8_to_int(const unsigned char *field) |
| { |
| return (uint8_t)field[0]; |
| } |
| |
| static inline uint16_t dtls_uint16_to_int(const unsigned char *field) |
| { |
| return ((uint16_t)field[0] << 8) |
| | (uint16_t)field[1]; |
| } |
| |
| static inline uint32_t dtls_uint24_to_int(const unsigned char *field) |
| { |
| return ((uint32_t)field[0] << 16) |
| | ((uint32_t)field[1] << 8) |
| | (uint32_t)field[2]; |
| } |
| |
| static inline uint32_t dtls_uint32_to_int(const unsigned char *field) |
| { |
| return ((uint32_t)field[0] << 24) |
| | ((uint32_t)field[1] << 16) |
| | ((uint32_t)field[2] << 8) |
| | (uint32_t)field[3]; |
| } |
| |
| static inline uint64_t dtls_uint48_to_int(const unsigned char *field) |
| { |
| return ((uint64_t)field[0] << 40) |
| | ((uint64_t)field[1] << 32) |
| | ((uint64_t)field[2] << 24) |
| | ((uint64_t)field[3] << 16) |
| | ((uint64_t)field[4] << 8) |
| | (uint64_t)field[5]; |
| } |
| |
| static inline uint64_t dtls_uint64_to_int(const unsigned char *field) |
| { |
| return ((uint64_t)field[0] << 56) |
| | ((uint64_t)field[1] << 48) |
| | ((uint64_t)field[2] << 40) |
| | ((uint64_t)field[3] << 32) |
| | ((uint64_t)field[4] << 24) |
| | ((uint64_t)field[5] << 16) |
| | ((uint64_t)field[6] << 8) |
| | (uint64_t)field[7]; |
| } |
| |
| #endif /* _DTLS_NUMERIC_H_ */ |