usr/src/lib/libast/common/string/fmtident.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 #include <ctype.h>
  26
  27 #define IDENT   01
  28 #define USAGE   02
  29
  30 /*
  31  * format what(1) and/or ident(1) string a
  32  */
  33
  34 char*
  35 fmtident(const char* a)
  36 {
  37         register char*  s = (char*)a;
  38         register char*  t;
  39         char*           buf;
  40         int             i;
  41
  42         i = 0;
  43         for (;;)
  44         {
  45                 while (isspace(*s))
  46                         s++;
  47                 if (s[0] == '[')
  48                 {
  49                         while (*++s && *s != '\n');
  50                         i |= USAGE;
  51                 }
  52                 else if (s[0] == '@' && s[1] == '(' && s[2] == '#' && s[3] == ')')
  53                         s += 4;
  54                 else if (s[0] == '$' && s[1] == 'I' && s[2] == 'd' && s[3] == ':' && isspace(s[4]))
  55                 {
  56                         s += 5;
  57                         i |= IDENT;
  58                 }
  59                 else
  60                         break;
  61         }
  62         if (i)
  63         {
  64                 i &= IDENT;
  65                 for (t = s; isprint(*t) && *t != '\n'; t++)
  66                         if (i && t[0] == ' ' && t[1] == '$')
  67                                 break;
  68                 while (t > s && isspace(t[-1]))
  69                         t--;
  70                 i = t - s;
  71                 buf = fmtbuf(i + 1);
  72                 memcpy(buf, s, i);
  73                 s = buf;
  74                 s[i] = 0;
  75         }
  76         return s;
  77 }