external/bsd/nvi/dist/ex/ex_abbrev.c

   1 /*      $NetBSD: ex_abbrev.c,v 1.2 2013/11/22 15:52:05 christos Exp $ */
   2 /*-
   3  * Copyright (c) 1992, 1993, 1994
   4  *      The Regents of the University of California.  All rights reserved.
   5  * Copyright (c) 1992, 1993, 1994, 1995, 1996
   6  *      Keith Bostic.  All rights reserved.
   7  *
   8  * See the LICENSE file for redistribution information.
   9  */
  10
  11 #include "config.h"
  12
  13 #ifndef lint
  14 static const char sccsid[] = "Id: ex_abbrev.c,v 10.10 2001/12/16 18:18:54 skimo Exp  (Berkeley) Date: 2001/12/16 18:18:54 ";
  15 #endif /* not lint */
  16
  17 #include <sys/types.h>
  18 #include <sys/queue.h>
  19 #include <sys/time.h>
  20
  21 #include <bitstring.h>
  22 #include <ctype.h>
  23 #include <limits.h>
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27
  28 #include "../common/common.h"
  29 #include "../vi/vi.h"
  30
  31 /*
  32  * ex_abbr -- :abbreviate [key replacement]
  33  *      Create an abbreviation or display abbreviations.
  34  *
  35  * PUBLIC: int ex_abbr __P((SCR *, EXCMD *));
  36  */
  37 int
  38 ex_abbr(SCR *sp, EXCMD *cmdp)
  39 {
  40         CHAR_T *p;
  41         size_t len;
  42
  43         switch (cmdp->argc) {
  44         case 0:
  45                 if (seq_dump(sp, SEQ_ABBREV, 0) == 0)
  46                         msgq(sp, M_INFO, "105|No abbreviations to display");
  47                 return (0);
  48         case 2:
  49                 break;
  50         default:
  51                 abort();
  52         }
  53
  54         /*
  55          * Check for illegal characters.
  56          *
  57          * !!!
  58          * Another fun one, historically.  See vi/v_ntext.c:txt_abbrev() for
  59          * details.  The bottom line is that all abbreviations have to end
  60          * with a "word" character, because it's the transition from word to
  61          * non-word characters that triggers the test for an abbreviation.  In
  62          * addition, because of the way the test is done, there can't be any
  63          * transitions from word to non-word character (or vice-versa) other
  64          * than between the next-to-last and last characters of the string,
  65          * and there can't be any <blank> characters.  Warn the user.
  66          */
  67         if (!inword(cmdp->argv[0]->bp[cmdp->argv[0]->len - 1])) {
  68                 msgq(sp, M_ERR,
  69                     "106|Abbreviations must end with a \"word\" character");
  70                         return (1);
  71         }
  72         for (p = cmdp->argv[0]->bp; *p != '\0'; ++p)
  73                 if (ISBLANK((UCHAR_T)p[0])) {
  74                         msgq(sp, M_ERR,
  75                             "107|Abbreviations may not contain tabs or spaces");
  76                         return (1);
  77                 }
  78         if (cmdp->argv[0]->len > 2)
  79                 for (p = cmdp->argv[0]->bp,
  80                     len = cmdp->argv[0]->len - 2; len; --len, ++p)
  81                         if (inword(p[0]) != inword(p[1])) {
  82                                 msgq(sp, M_ERR,
  83 "108|Abbreviations may not mix word/non-word characters, except at the end");
  84                                 return (1);
  85                         }
  86
  87         if (seq_set(sp, NULL, 0, cmdp->argv[0]->bp, cmdp->argv[0]->len,
  88             cmdp->argv[1]->bp, cmdp->argv[1]->len, SEQ_ABBREV, SEQ_USERDEF))
  89                 return (1);
  90
  91         F_SET(sp->gp, G_ABBREV);
  92         return (0);
  93 }
  94
  95 /*
  96  * ex_unabbr -- :unabbreviate key
  97  *      Delete an abbreviation.
  98  *
  99  * PUBLIC: int ex_unabbr __P((SCR *, EXCMD *));
 100  */
 101 int
 102 ex_unabbr(SCR *sp, EXCMD *cmdp)
 103 {
 104         ARGS *ap;
 105
 106         ap = cmdp->argv[0];
 107         if (!F_ISSET(sp->gp, G_ABBREV) ||
 108             seq_delete(sp, ap->bp, ap->len, SEQ_ABBREV)) {
 109                 msgq_wstr(sp, M_ERR, ap->bp,
 110                     "109|\"%s\" is not an abbreviation");
 111                 return (1);
 112         }
 113         return (0);
 114 }