usr/src/lib/libast/common/string/fmtbase.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  * Glenn Fowler
  25  * AT&T Bell Laboratories
  26  *
  27  * return base b representation for n
  28  * if p!=0 then base prefix is included
  29  * otherwise if n==0 or b==0 then output is signed base 10
  30  */
  31
  32 #include <ast.h>
  33
  34 #undef  fmtbasell
  35
  36 char*
  37 fmtbasell(register intmax_t n, register int b, int p)
  38 {
  39         char*   buf;
  40         int     z;
  41
  42         buf = fmtbuf(z = 72);
  43         if (!p && (n == 0 || b == 0))
  44                 sfsprintf(buf, z, "%I*d", sizeof(n), n);
  45         else
  46                 sfsprintf(buf, z, p ? "%#..*I*u" : "%..*I*u", b, sizeof(n), n);
  47         return buf;
  48 }
  49
  50 #undef  fmtbase
  51
  52 char*
  53 fmtbase(long n, int b, int p)
  54 {
  55         return fmtbasell((intmax_t)n, b, p);
  56 }