Version 0.5.0 of tinydtls
Dependents: tinydtls_test_cellular tinydtls_test_ethernet tiny-dtls
numeric.h
- Committer:
- ashleymills
- Date:
- 2014-02-12
- Revision:
- 1:598a56fe116e
- Parent:
- 0:ff9ebe0cf0e9
File content as of revision 1:598a56fe116e:
/* 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 _NUMERIC_H_ #define _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 /** * Increments given \p Var of type \p Type by \c 1. * * \hideinitializer */ #define inc_uint(Type,Var) { \ int i = sizeof(Type); \ while (i && !++((Var)[--i])); \ } /* this one is for consistency... */ #define dtls_int_to_uint8(Field,Value) do { \ *(unsigned char*)(Field) = (Value) & 0xff; \ } while(0) #define dtls_int_to_uint16(Field,Value) do { \ *(unsigned char*)(Field) = ((Value) >> 8) & 0xff; \ *(((unsigned char*)(Field))+1) = ((Value) & 0xff); \ } while(0) #define dtls_int_to_uint24(Field,Value) do { \ *(unsigned char*)(Field) = ((Value) >> 16) & 0xff; \ dtls_int_to_uint16((((unsigned char*)(Field))+1),Value); \ } while(0) #define dtls_int_to_uint32(Field,Value) do { \ *(unsigned char*)(Field) = ((Value) >> 24) & 0xff; \ *(((unsigned char*)(Field))+1) = ((Value) >> 16) & 0xff; \ *(((unsigned char*)(Field))+2) = ((Value) >> 8) & 0xff; \ *(((unsigned char*)(Field))+3) = (Value) & 0xff; \ } while(0) #define dtls_ulong_to_uint48(Field,Value) do { \ *(unsigned char*)(Field) = ((Value) >> 40) & 0xff; \ *(((unsigned char*)(Field))+1) = ((Value) >> 32) & 0xff; \ *(((unsigned char*)(Field))+2) = ((Value) >> 24) & 0xff; \ *(((unsigned char*)(Field))+3) = ((Value) >> 16) & 0xff; \ *(((unsigned char*)(Field))+4) = ((Value) >> 8) & 0xff; \ *(((unsigned char*)(Field))+5) = (Value) & 0xff; \ } while(0) #define dtls_ulong_to_uint64(Field,Value) do { \ *(unsigned char*)(Field) = ((Value) >> 56) & 0xff; \ *(((unsigned char*)(Field))+1) = ((Value) >> 48) & 0xff; \ *(((unsigned char*)(Field))+2) = ((Value) >> 40) & 0xff; \ *(((unsigned char*)(Field))+3) = ((Value) >> 32) & 0xff; \ *(((unsigned char*)(Field))+4) = ((Value) >> 24) & 0xff; \ *(((unsigned char*)(Field))+5) = ((Value) >> 16) & 0xff; \ *(((unsigned char*)(Field))+6) = ((Value) >> 8) & 0xff; \ *(((unsigned char*)(Field))+7) = (Value) & 0xff; \ } while(0) #define dtls_uint8_to_int(Field) \ (*(unsigned char*)(Field) & 0xFF) #define dtls_uint16_to_int(Field) \ (((*(unsigned char*)(Field)) << 8) | (*(((unsigned char*)(Field))+1))) #define dtls_uint24_to_int(Field) \ (((*(((unsigned char*)(Field)))) << 16) \ | ((*(((unsigned char*)(Field))+1)) << 8) \ | ((*(((unsigned char*)(Field))+2)))) #define dtls_uint32_to_int(Field) \ ((*(unsigned char*)(Field)) << 24) \ | ((*(((unsigned char*)(Field))+1)) << 16) \ | ((*(((unsigned char*)(Field))+2)) << 8) \ | ((*(((unsigned char*)(Field))+3))) #define dtls_uint48_to_ulong(Field) \ (((uint64_t) *(unsigned char*)(Field)) << 40) \ | (((uint64_t) *(((unsigned char*)(Field))+1)) << 32) \ | (((uint64_t) *(((unsigned char*)(Field))+2)) << 24) \ | (((uint64_t) *(((unsigned char*)(Field))+3)) << 16) \ | (((uint64_t) *(((unsigned char*)(Field))+4)) << 8) \ | (((uint64_t) *(((unsigned char*)(n))+5))) #endif /* _NUMERIC_H_ */