usr.bin/rcs/src/rcskeys.c

   1 /*
   2  *                     RCS keyword table and match operation
   3  */
   4 #ifndef lint
   5 static char rcsid[]= "$Id: rcskeys.c,v 1.1 1993/03/21 09:58:08 cgd Exp $ Purdue CS";
   6 #endif
   7
   8 /* Copyright (C) 1982, 1988, 1989 Walter Tichy
   9  * All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms are permitted
  12  * provided that the above copyright notice and this paragraph are
  13  * duplicated in all such forms and that any documentation,
  14  * advertising materials, and other materials related to such
  15  * distribution and use acknowledge that the software was developed
  16  * by Walter Tichy.
  17  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  20  *
  21  * Report all problems and direct all questions to:
  22  *   rcs-bugs@cs.purdue.edu
  23  *
  24
  25
  26
  27
  28
  29
  30
  31 */
  32
  33
  34
  35 /* $Log:        rcskeys.c,v $
  36  * Revision 4.3  89/05/01  15:13:02  narten
  37  * changed copyright header to reflect current distribution rules
  38  *
  39  * Revision 4.2  87/10/18  10:36:33  narten
  40  * Updating version numbers. Changes relative to 1.1 actuallyt
  41  * relative to 4.1
  42  *
  43  * Revision 1.2  87/09/24  14:00:10  narten
  44  * Sources now pass through lint (if you ignore printf/sprintf/fprintf
  45  * warnings)
  46  *
  47  * Revision 1.1  84/01/23  14:50:32  kcs
  48  * Initial revision
  49  *
  50  * Revision 4.1  83/05/04  10:06:53  wft
  51  * Initial revision.
  52  *
  53  */
  54
  55
  56 #include "rcsbase.h"
  57
  58
  59
  60 struct { char * keyword; enum markers marker;} markertable[] =
  61         {{AUTHOR,   Author  },
  62          {DATE,     Date    },
  63          {HEADER,   Header  },
  64          {IDH,      Id      },
  65          {LOCKER,   Locker  },
  66          {LOG,      Log     },
  67          {RCSFILE,  RCSfile },
  68          {REVISION, Revision},
  69          {SOURCE,   Source  },
  70          {STATE,    State   },
  71          {nil,      Nomatch }};
  72
  73
  74
  75 enum markers trymatch(string,onlyvdelim)
  76 char * string;
  77 /* function: Checks whether string starts with a keyword followed
  78  * by a KDELIM or a VDELIM. If onlyvdelim==true, only a VDELIM
  79  * may follow the keyword.
  80  * If successful, returns the appropriate marker, otherwise Nomatch.
  81  */
  82 {
  83         register int j;
  84         register char * p, * s;
  85         for (j=0; markertable[j].keyword!=nil; j++ ) {
  86                 /* try next keyword */
  87                 p = markertable[j].keyword; s = string;
  88                 while (*p!='\0' && *s!='\0' && *p == *s) {
  89                         p++; s++;
  90                 }
  91                 if (*p != '\0') continue; /* no match */
  92                 if ((*s == VDELIM) || (!onlyvdelim && (*s == KDELIM)))
  93                         return(markertable[j].marker);
  94         }
  95         return(Nomatch);
  96 }
  97