usr/src/lib/libast/common/misc/optesc.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 Research
  26  *
  27  * escape optget() special chars in s and write to sp
  28  * esc == '?' or ':' also escaped
  29  */
  30
  31 #include <optlib.h>
  32 #include <ctype.h>
  33
  34 int
  35 optesc(Sfio_t* sp, register const char* s, int esc)
  36 {
  37         register const char*    m;
  38         register int            c;
  39
  40         if (*s == '[' && *(s + 1) == '+' && *(s + 2) == '?')
  41         {
  42                 c = strlen(s);
  43                 if (s[c - 1] == ']')
  44                 {
  45                         sfprintf(sp, "%-.*s", c - 4, s + 3);
  46                         return 0;
  47                 }
  48         }
  49         if (esc != '?' && esc != ':')
  50                 esc = 0;
  51         while (c = *s++)
  52         {
  53                 if (isalnum(c))
  54                 {
  55                         for (m = s - 1; isalnum(*s); s++);
  56                         if (isalpha(c) && *s == '(' && isdigit(*(s + 1)) && *(s + 2) == ')')
  57                         {
  58                                 sfputc(sp, '\b');
  59                                 sfwrite(sp, m, s - m);
  60                                 sfputc(sp, '\b');
  61                                 sfwrite(sp, s, 3);
  62                                 s += 3;
  63                         }
  64                         else
  65                                 sfwrite(sp, m, s - m);
  66                 }
  67                 else if (c == '-' && *s == '-' || c == '<')
  68                 {
  69                         m = s - 1;
  70                         if (c == '-')
  71                                 s++;
  72                         else if (*s == '/')
  73                                 s++;
  74                         while (isalnum(*s))
  75                                 s++;
  76                         if (c == '<' && *s == '>' || isspace(*s) || *s == 0 || *s == '=' || *s == ':' || *s == ';' || *s == '.' || *s == ',')
  77                         {
  78                                 sfputc(sp, '\b');
  79                                 sfwrite(sp, m, s - m);
  80                                 sfputc(sp, '\b');
  81                         }
  82                         else
  83                                 sfwrite(sp, m, s - m);
  84                 }
  85                 else
  86                 {
  87                         if (c == ']' || c == esc)
  88                                 sfputc(sp, c);
  89                         sfputc(sp, c);
  90                 }
  91         }
  92         return 0;
  93 }