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

   1 /*      $NetBSD: ex_map.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_map.c,v 10.11 2001/06/25 15:19:17 skimo Exp  (Berkeley) Date: 2001/06/25 15:19:17 ";
  17 #endif /* not lint */
  18 #else
  19 __RCSID("$NetBSD: ex_map.c,v 1.3 2014/01/26 21:43:45 christos Exp $");
  20 #endif
  21
  22 #include <sys/types.h>
  23 #include <sys/queue.h>
  24
  25 #include <bitstring.h>
  26 #include <ctype.h>
  27 #include <limits.h>
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30 #include <string.h>
  31
  32 #include "../common/common.h"
  33
  34 /*
  35  * ex_map -- :map[!] [input] [replacement]
  36  *      Map a key/string or display mapped keys.
  37  *
  38  * Historical note:
  39  *      Historic vi maps were fairly bizarre, and likely to differ in
  40  *      very subtle and strange ways from this implementation.  Two
  41  *      things worth noting are that vi would often hang or drop core
  42  *      if the map was strange enough (ex: map X "xy$@x^V), or, simply
  43  *      not work.  One trick worth remembering is that if you put a
  44  *      mark at the start of the map, e.g. map X mx"xy ...), or if you
  45  *      put the map in a .exrc file, things would often work much better.
  46  *      No clue why.
  47  *
  48  * PUBLIC: int ex_map __P((SCR *, EXCMD *));
  49  */
  50 int
  51 ex_map(SCR *sp, EXCMD *cmdp)
  52 {
  53         seq_t stype;
  54         CHAR_T *input, *p;
  55
  56         stype = FL_ISSET(cmdp->iflags, E_C_FORCE) ? SEQ_INPUT : SEQ_COMMAND;
  57
  58         switch (cmdp->argc) {
  59         case 0:
  60                 if (seq_dump(sp, stype, 1) == 0)
  61                         msgq(sp, M_INFO, stype == SEQ_INPUT ?
  62                             "132|No input map entries" :
  63                             "133|No command map entries");
  64                 return (0);
  65         case 2:
  66                 input = cmdp->argv[0]->bp;
  67                 break;
  68         default:
  69                 abort();
  70         }
  71
  72         /*
  73          * If the mapped string is #[0-9]* (and wasn't quoted) then store the
  74          * function key mapping.  If the screen specific routine has been set,
  75          * call it as well.  Note, the SEQ_FUNCMAP type is persistent across
  76          * screen types, maybe the next screen type will get it right.
  77          */
  78         if (input[0] == '#' && ISDIGIT((UCHAR_T)input[1])) {
  79                 for (p = input + 2; ISDIGIT((UCHAR_T)*p); ++p);
  80                 if (p[0] != '\0')
  81                         goto nofunc;
  82
  83                 if (seq_set(sp, NULL, 0, input, cmdp->argv[0]->len,
  84                     cmdp->argv[1]->bp, cmdp->argv[1]->len, stype,
  85                     SEQ_FUNCMAP | SEQ_USERDEF))
  86                         return (1);
  87                 return (sp->gp->scr_fmap == NULL ? 0 :
  88                     sp->gp->scr_fmap(sp, stype, input, cmdp->argv[0]->len,
  89                     cmdp->argv[1]->bp, cmdp->argv[1]->len));
  90         }
  91
  92         /* Some single keys may not be remapped in command mode. */
  93 nofunc: if (stype == SEQ_COMMAND && input[1] == '\0')
  94                 switch (KEY_VAL(sp, input[0])) {
  95                 case K_COLON:
  96                 case K_ESCAPE:
  97                 case K_NL:
  98                         msgq(sp, M_ERR,
  99                             "134|The %s character may not be remapped",
 100                             KEY_NAME(sp, input[0]));
 101                         return (1);
 102                 }
 103         return (seq_set(sp, NULL, 0, input, cmdp->argv[0]->len,
 104             cmdp->argv[1]->bp, cmdp->argv[1]->len, stype, SEQ_USERDEF));
 105 }
 106
 107 /*
 108  * ex_unmap -- (:unmap[!] key)
 109  *      Unmap a key.
 110  *
 111  * PUBLIC: int ex_unmap __P((SCR *, EXCMD *));
 112  */
 113 int
 114 ex_unmap(SCR *sp, EXCMD *cmdp)
 115 {
 116         if (seq_delete(sp, cmdp->argv[0]->bp, cmdp->argv[0]->len,
 117             FL_ISSET(cmdp->iflags, E_C_FORCE) ? SEQ_INPUT : SEQ_COMMAND)) {
 118                 msgq_wstr(sp, M_INFO,
 119                     cmdp->argv[0]->bp, "135|\"%s\" isn't currently mapped");
 120                 return (1);
 121         }
 122         return (0);
 123 }