mbed port of tinydtls
Diff: numeric.h
- Revision:
- 0:04990d454f45
diff -r 000000000000 -r 04990d454f45 numeric.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/numeric.h Thu Oct 10 21:38:07 2013 +0000 @@ -0,0 +1,110 @@ +/* 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_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_ */