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

   1
   2 /*
   3  * snprintb.c -- snprintf a %b string
   4  *
   5  * $Id$
   6  *
   7  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   8  * COPYRIGHT file in the root directory of the nmh distribution for
   9  * complete copyright information.
  10  */
  11
  12 #include <h/mh.h>
  13
  14
  15 char *
  16 snprintb (char *buffer, size_t n, unsigned v, char *bits)
  17 {
  18     register int i, j;
  19     register char c, *bp;
  20
  21     snprintf (buffer, n, bits && *bits == 010 ? "0%o" : "0x%x", v);
  22     bp = buffer + strlen(buffer);
  23
  24     if (bits && *++bits) {
  25         j = 0;
  26         *bp++ = '<';
  27         while ((i = *bits++))
  28             if (v & (1 << (i - 1))) {
  29                 if (j++)
  30                     *bp++ = ',';
  31                 for (; (c = *bits) > 32; bits++)
  32                     *bp++ = c;
  33             }
  34             else
  35                 for (; *bits > 32; bits++)
  36                     continue;
  37         *bp++ = '>';
  38         *bp = 0;
  39     }
  40
  41     return buffer;
  42 }