usr/src/lib/libast/common/string/fmtip4.c

   1 /***********************************************************************
   2 *                                                                      *
   3 *               This software is part of the ast package               *
   4 *          Copyright (c) 1985-2010 AT&T Intellectual Property          *
   5 *                      and is licensed under the                       *
   6 *                  Common Public License, Version 1.0                  *
   7 *                    by AT&T Intellectual Property                     *
   8 *                                                                      *
   9 *                A copy of the License is available at                 *
  10 *            http://www.opensource.org/licenses/cpl1.0.txt             *
  11 *         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
  12 *                                                                      *
  13 *              Information and Software Systems Research               *
  14 *                            AT&T Research                             *
  15 *                           Florham Park NJ                            *
  16 *                                                                      *
  17 *                 Glenn Fowler <gsf@research.att.com>                  *
  18 *                  David Korn <dgk@research.att.com>                   *
  19 *                   Phong Vo <kpv@research.att.com>                    *
  20 *                                                                      *
  21 ***********************************************************************/
  22 #pragma prototyped
  23
  24 #include <ast.h>
  25
  26 /*
  27  * format 4 byte local byte order ip address
  28  * and optional prefix bits (if 0 <= bits <= 32)
  29  */
  30
  31 char*
  32 fmtip4(register uint32_t addr, int bits)
  33 {
  34         char*   buf;
  35         int     z;
  36         int     i;
  37
  38         buf = fmtbuf(z = 20);
  39         i = sfsprintf(buf, z, "%d.%d.%d.%d", (addr>>24)&0xff, (addr>>16)&0xff, (addr>>8)&0xff, (addr)&0xff);
  40         if (bits >= 0 && bits <= 32)
  41                 sfsprintf(buf + i, z - i, "/%d", bits);
  42         return buf;
  43 }