1 #ifndef __BINARYCONST_H__ 2 #define __BINARYCONST_H__ 3 4 /* binaryconst.h was integrated into the Dillo project in April 2004, and 5 * presumably comes from the ancestor of the code found at 6 * http://cprog.tomsweb.net/binconst.txt 7 */ 8 9 /* Macros for allowing binary constants in C 10 * By Tom Torfs - donated to the public domain */ 11 12 #define HEX__(n) 0x##n##LU 13 14 /* 8-bit conversion function */ 15 #define B8__(x) ((x&0x0000000FLU)?1:0) \ 16 +((x&0x000000F0LU)?2:0) \ 17 +((x&0x00000F00LU)?4:0) \ 18 +((x&0x0000F000LU)?8:0) \ 19 +((x&0x000F0000LU)?16:0) \ 20 +((x&0x00F00000LU)?32:0) \ 21 +((x&0x0F000000LU)?64:0) \ 22 +((x&0xF0000000LU)?128:0) 23 24 25 /* 26 * *** USER MACROS *** 27 */ 28 29 /* for upto 8-bit binary constants */ 30 #define B8(d) ((unsigned char)B8__(HEX__(d))) 31 32 /* for upto 16-bit binary constants, MSB first */ 33 #define B16(dmsb,dlsb) (((unsigned short)B8(dmsb)<<8) + B8(dlsb)) 34 35 /* 36 * Sample usage: 37 * B8(01010101) = 85 38 * B16(10101010,01010101) = 43605 39 */ 40 41 42 #endif /* __BINARYCONST_H__ */ 43 44