binary.h
Go to the documentation of this file.
1 /* Binary constant generator macro
2 By Tom Torfs - donated to the public domain
3 */
4 
5 /* All macro's evaluate to compile-time constants */
6 
7 /* *** helper macros ***/
8 
9 /* turn a numeric literal into a hex constant
10 (avoids problems with leading zeroes)
11 8-bit constants max value 0x11111111, always fits in unsigned long
12 */
13 #define HEX__(n) 0x##n##LU
14 
15 /* 8-bit conversion function */
16 #define B8__(x) ((x&0x0000000FLU)?1:0) \
17 +((x&0x000000F0LU)?2:0) \
18 +((x&0x00000F00LU)?4:0) \
19 +((x&0x0000F000LU)?8:0) \
20 +((x&0x000F0000LU)?16:0) \
21 +((x&0x00F00000LU)?32:0) \
22 +((x&0x0F000000LU)?64:0) \
23 +((x&0xF0000000LU)?128:0)
24 
25 /* *** user macros ***/
26 
27 /* for upto 8-bit binary constants */
28 #define B8(d) ((int8)B8__(HEX__(d)))
29 
30 /* for upto 16-bit binary constants, MSB first */
31 #define B16(dmsb,dlsb) (((int16)B8(dmsb)<< \
32 + B8(dlsb))
33 
34 /* for upto 32-bit binary constants, MSB first */
35 #define B32(dmsb,db2,db3,dlsb) (((int32)B8(dmsb)<<24) \
36 + ((int32)B8(db2)<<16) \
37 + ((int32)B8(db3)<< \
38 + B8(dlsb))
39 
40 /* Sample usage:
41 B8(01010101) = 85
42 B16(10101010,01010101) = 43605
43 B32(10000000,11111111,10101010,01010101) = 2164238933
44 */


sr_external_dependencies
Author(s): Ugo Cupcic
autogenerated on Fri Jan 1 2021 03:23:17