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fmtident.c

/***********************************************************************
*                                                                      *
*               This software is part of the ast package               *
*          Copyright (c) 1985-2010 AT&T Intellectual Property          *
*                      and is licensed under the                       *
*                  Common Public License, Version 1.0                  *
*                    by AT&T Intellectual Property                     *
*                                                                      *
*                A copy of the License is available at                 *
*            http://www.opensource.org/licenses/cpl1.0.txt             *
*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
*                                                                      *
*              Information and Software Systems Research               *
*                            AT&T Research                             *
*                           Florham Park NJ                            *
*                                                                      *
*                 Glenn Fowler <gsf@research.att.com>                  *
*                  David Korn <dgk@research.att.com>                   *
*                   Phong Vo <kpv@research.att.com>                    *
*                                                                      *
***********************************************************************/
#pragma prototyped

#include <ast.h>
#include <ctype.h>

#define IDENT     01
#define USAGE     02

/*
 * format what(1) and/or ident(1) string a
 */

char*
fmtident(const char* a)
{
      register char*    s = (char*)a;
      register char*    t;
      char*       buf;
      int         i;

      i = 0;
      for (;;)
      {
            while (isspace(*s))
                  s++;
            if (s[0] == '[')
            {
                  while (*++s && *s != '\n');
                  i |= USAGE;
            }
            else if (s[0] == '@' && s[1] == '(' && s[2] == '#' && s[3] == ')')
                  s += 4;
            else if (s[0] == '$' && s[1] == 'I' && s[2] == 'd' && s[3] == ':' && isspace(s[4]))
            {
                  s += 5;
                  i |= IDENT;
            }
            else
                  break;
      }
      if (i)
      {
            i &= IDENT;
            for (t = s; isprint(*t) && *t != '\n'; t++)
                  if (i && t[0] == ' ' && t[1] == '$')
                        break;
            while (t > s && isspace(t[-1]))
                  t--;
            i = t - s;
            buf = fmtbuf(i + 1);
            memcpy(buf, s, i);
            s = buf;
            s[i] = 0;
      }
      return s;
}

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