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

   1 /*      $NetBSD: ex_abbrev.c,v 1.3 2014/01/26 21:43:45 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 #include <sys/cdefs.h>
  14 #if 0
  15 #ifndef lint
  16 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 ";
  17 #endif /* not lint */
  18 #else
  19 __RCSID("$NetBSD: ex_abbrev.c,v 1.3 2014/01/26 21:43:45 christos Exp $");
  20 #endif
  21
  22 #include <sys/types.h>
  23 #include <sys/queue.h>
  24 #include <sys/time.h>
  25
  26 #include <bitstring.h>
  27 #include <ctype.h>
  28 #include <limits.h>
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32
  33 #include "../common/common.h"
  34 #include "../vi/vi.h"
  35
  36 /*
  37  * ex_abbr -- :abbreviate [key replacement]
  38  *      Create an abbreviation or display abbreviations.
  39  *
  40  * PUBLIC: int ex_abbr __P((SCR *, EXCMD *));
  41  */
  42 int
  43 ex_abbr(SCR *sp, EXCMD *cmdp)
  44 {
  45         CHAR_T *p;
  46         size_t len;
  47
  48         switch (cmdp->argc) {
  49         case 0:
  50                 if (seq_dump(sp, SEQ_ABBREV, 0) == 0)
  51                         msgq(sp, M_INFO, "105|No abbreviations to display");
  52                 return (0);
  53         case 2:
  54                 break;
  55         default:
  56                 abort();
  57         }
  58
  59         /*
  60          * Check for illegal characters.
  61          *
  62          * !!!
  63          * Another fun one, historically.  See vi/v_ntext.c:txt_abbrev() for
  64          * details.  The bottom line is that all abbreviations have to end
  65          * with a "word" character, because it's the transition from word to
  66          * non-word characters that triggers the test for an abbreviation.  In
  67          * addition, because of the way the test is done, there can't be any
  68          * transitions from word to non-word character (or vice-versa) other
  69          * than between the next-to-last and last characters of the string,
  70          * and there can't be any <blank> characters.  Warn the user.
  71          */
  72         if (!inword(cmdp->argv[0]->bp[cmdp->argv[0]->len - 1])) {
  73                 msgq(sp, M_ERR,
  74                     "106|Abbreviations must end with a \"word\" character");
  75                         return (1);
  76         }
  77         for (p = cmdp->argv[0]->bp; *p != '\0'; ++p)
  78                 if (ISBLANK((UCHAR_T)p[0])) {
  79                         msgq(sp, M_ERR,
  80                             "107|Abbreviations may not contain tabs or spaces");
  81                         return (1);
  82                 }
  83         if (cmdp->argv[0]->len > 2)
  84                 for (p = cmdp->argv[0]->bp,
  85                     len = cmdp->argv[0]->len - 2; len; --len, ++p)
  86                         if (inword(p[0]) != inword(p[1])) {
  87                                 msgq(sp, M_ERR,
  88 "108|Abbreviations may not mix word/non-word characters, except at the end");
  89                                 return (1);
  90                         }
  91
  92         if (seq_set(sp, NULL, 0, cmdp->argv[0]->bp, cmdp->argv[0]->len,
  93             cmdp->argv[1]->bp, cmdp->argv[1]->len, SEQ_ABBREV, SEQ_USERDEF))
  94                 return (1);
  95
  96         F_SET(sp->gp, G_ABBREV);
  97         return (0);
  98 }
  99
 100 /*
 101  * ex_unabbr -- :unabbreviate key
 102  *      Delete an abbreviation.
 103  *
 104  * PUBLIC: int ex_unabbr __P((SCR *, EXCMD *));
 105  */
 106 int
 107 ex_unabbr(SCR *sp, EXCMD *cmdp)
 108 {
 109         ARGS *ap;
 110
 111         ap = cmdp->argv[0];
 112         if (!F_ISSET(sp->gp, G_ABBREV) ||
 113             seq_delete(sp, ap->bp, ap->len, SEQ_ABBREV)) {
 114                 msgq_wstr(sp, M_ERR, ap->bp,
 115                     "109|\"%s\" is not an abbreviation");
 116                 return (1);
 117         }
 118         return (0);
 119 }