dist/nvi/ex/ex_abbrev.c

   1 /*      $NetBSD$ */
   2
   3 /*-
   4  * Copyright (c) 1992, 1993, 1994
   5  *      The Regents of the University of California.  All rights reserved.
   6  * Copyright (c) 1992, 1993, 1994, 1995, 1996
   7  *      Keith Bostic.  All rights reserved.
   8  *
   9  * See the LICENSE file for redistribution information.
  10  */
  11
  12 #include "config.h"
  13
  14 #ifndef lint
  15 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";
  16 #endif /* not lint */
  17
  18 #include <sys/types.h>
  19 #include <sys/queue.h>
  20 #include <sys/time.h>
  21
  22 #include <bitstring.h>
  23 #include <ctype.h>
  24 #include <limits.h>
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28
  29 #include "../common/common.h"
  30 #include "../vi/vi.h"
  31
  32 /*
  33  * ex_abbr -- :abbreviate [key replacement]
  34  *      Create an abbreviation or display abbreviations.
  35  *
  36  * PUBLIC: int ex_abbr __P((SCR *, EXCMD *));
  37  */
  38 int
  39 ex_abbr(SCR *sp, EXCMD *cmdp)
  40 {
  41         CHAR_T *p;
  42         size_t len;
  43
  44         switch (cmdp->argc) {
  45         case 0:
  46                 if (seq_dump(sp, SEQ_ABBREV, 0) == 0)
  47                         msgq(sp, M_INFO, "105|No abbreviations to display");
  48                 return (0);
  49         case 2:
  50                 break;
  51         default:
  52                 abort();
  53         }
  54
  55         /*
  56          * Check for illegal characters.
  57          *
  58          * !!!
  59          * Another fun one, historically.  See vi/v_ntext.c:txt_abbrev() for
  60          * details.  The bottom line is that all abbreviations have to end
  61          * with a "word" character, because it's the transition from word to
  62          * non-word characters that triggers the test for an abbreviation.  In
  63          * addition, because of the way the test is done, there can't be any
  64          * transitions from word to non-word character (or vice-versa) other
  65          * than between the next-to-last and last characters of the string,
  66          * and there can't be any <blank> characters.  Warn the user.
  67          */
  68         if (!inword(cmdp->argv[0]->bp[cmdp->argv[0]->len - 1])) {
  69                 msgq(sp, M_ERR,
  70                     "106|Abbreviations must end with a \"word\" character");
  71                         return (1);
  72         }
  73         for (p = cmdp->argv[0]->bp; *p != '\0'; ++p)
  74                 if (ISBLANK(p[0])) {
  75                         msgq(sp, M_ERR,
  76                             "107|Abbreviations may not contain tabs or spaces");
  77                         return (1);
  78                 }
  79         if (cmdp->argv[0]->len > 2)
  80                 for (p = cmdp->argv[0]->bp,
  81                     len = cmdp->argv[0]->len - 2; len; --len, ++p)
  82                         if (inword(p[0]) != inword(p[1])) {
  83                                 msgq(sp, M_ERR,
  84 "108|Abbreviations may not mix word/non-word characters, except at the end");
  85                                 return (1);
  86                         }
  87
  88         if (seq_set(sp, NULL, 0, cmdp->argv[0]->bp, cmdp->argv[0]->len,
  89             cmdp->argv[1]->bp, cmdp->argv[1]->len, SEQ_ABBREV, SEQ_USERDEF))
  90                 return (1);
  91
  92         F_SET(sp->gp, G_ABBREV);
  93         return (0);
  94 }
  95
  96 /*
  97  * ex_unabbr -- :unabbreviate key
  98  *      Delete an abbreviation.
  99  *
 100  * PUBLIC: int ex_unabbr __P((SCR *, EXCMD *));
 101  */
 102 int
 103 ex_unabbr(SCR *sp, EXCMD *cmdp)
 104 {
 105         ARGS *ap;
 106
 107         ap = cmdp->argv[0];
 108         if (!F_ISSET(sp->gp, G_ABBREV) ||
 109             seq_delete(sp, ap->bp, ap->len, SEQ_ABBREV)) {
 110                 msgq_wstr(sp, M_ERR, ap->bp,
 111                     "109|\"%s\" is not an abbreviation");
 112                 return (1);
 113         }
 114         return (0);
 115 }