diplodocus.org Git - nmh/blob - sbr/snprintb.c

   1
   2 /*
   3  * snprintb.c -- snprintf a %b string
   4  *
   5  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   6  * COPYRIGHT file in the root directory of the nmh distribution for
   7  * complete copyright information.
   8  */
   9
  10 #include <h/mh.h>
  11
  12
  13 char *
  14 snprintb (char *buffer, size_t n, unsigned v, char *bits)
  15 {
  16     register int i, j;
  17     register char c, *bp;
  18
  19     snprintf (buffer, n, bits && *bits == 010 ? "0%o" : "0x%x", v);
  20     bp = buffer + strlen(buffer);
  21
  22     if (bits && *++bits) {
  23         j = 0;
  24         *bp++ = '<';
  25         while ((i = *bits++))
  26             if (v & (1 << (i - 1))) {
  27                 if (j++)
  28                     *bp++ = ',';
  29                 for (; (c = *bits) > 32; bits++)
  30                     *bp++ = c;
  31             }
  32             else
  33                 for (; *bits > 32; bits++)
  34                     continue;
  35         *bp++ = '>';
  36         *bp = 0;
  37     }
  38
  39     return buffer;
  40 }