| /* +++Date last modified: 05-Jul-1997 */ |
| |
| /* |
| ** bitstring(): print bit pattern of bytes formatted to string. |
| ** |
| ** By J. Blauth, Sept. 1992. Hereby placed into the public domain. |
| ** |
| ** byze: value to transform to bitstring. |
| ** biz: count of bits to be shown (counted from lowest bit, can be any |
| ** even or odd number). |
| ** strwid: total width the string shall have. Since between every 4 bits a |
| ** blank (0x20) is inserted (not added after lowest bit), width of |
| ** bitformat only is (biz+(biz/4-1)). Bits are printed right aligned, |
| ** positions from highest bit to start of string filled with blanks. |
| ** If value of strwid smaller than space needed to print all bits, |
| ** strwid is ignored (e.g.: |
| ** bitstr(s,b,16,5) results in 19 chars +'\0'). |
| ** |
| ** EXAMPLE: |
| ** for (j = 1; j <= 16; j++) { bitstring(s, j, j, 16); puts(s); } |
| ** 1: 1 |
| ** 2: 10 |
| ** 3: 011 |
| ** d: 0 0000 0000 1101 |
| ** e: 00 0000 0000 1110 |
| ** f: 000 0000 0000 1111 |
| */ |
| |
| #include "bitops.h" |
| |
| void bitstring(char *str, long byze, int biz, int strwid) |
| { |
| int i, j; |
| |
| j = strwid - (biz + (biz >> 2)- (biz % 4 ? 0 : 1)); |
| for (i = 0; i < j; i++) |
| *str++ = ' '; |
| while (--biz >= 0) |
| { |
| *str++ = ((byze >> biz) & 1) + '0'; |
| if (!(biz % 4) && biz) |
| *str++ = ' '; |
| } |
| *str = '\0'; |
| } |
| |
| #ifdef TEST |
| |
| #include <stdlib.h> |
| |
| int main(void) |
| { |
| char s[80]; long j; |
| for (j = 1L; j <= 16L; j++) |
| { |
| bitstring(s, (long)j, (int)j, 16); |
| printf("%2ld: %s\n", j, s); |
| } |
| return EXIT_SUCCESS; |
| } |
| |
| #endif /* TEST */ |