release/src/router/mysql/cmd-line-utils/libedit/hist.c

   1 /*      $NetBSD: hist.c,v 1.20 2011/07/29 15:16:33 christos Exp $       */
   2
   3 /*-
   4  * Copyright (c) 1992, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * Christos Zoulas of Cornell University.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 #include "config.h"
  36 #if !defined(lint) && !defined(SCCSID)
  37 #if 0
  38 static char sccsid[] = "@(#)hist.c      8.1 (Berkeley) 6/4/93";
  39 #else
  40 #endif
  41 #endif /* not lint && not SCCSID */
  42
  43 /*
  44  * hist.c: History access functions
  45  */
  46 #include <stdlib.h>
  47 #include "el.h"
  48
  49 /* hist_init():
  50  *      Initialization function.
  51  */
  52 protected int
  53 hist_init(EditLine *el)
  54 {
  55
  56         el->el_history.fun = NULL;
  57         el->el_history.ref = NULL;
  58         el->el_history.buf = el_malloc(EL_BUFSIZ * sizeof(*el->el_history.buf));
  59         el->el_history.sz  = EL_BUFSIZ;
  60         if (el->el_history.buf == NULL)
  61                 return -1;
  62         el->el_history.last = el->el_history.buf;
  63         return 0;
  64 }
  65
  66
  67 /* hist_end():
  68  *      clean up history;
  69  */
  70 protected void
  71 hist_end(EditLine *el)
  72 {
  73
  74         el_free(el->el_history.buf);
  75         el->el_history.buf = NULL;
  76 }
  77
  78
  79 /* hist_set():
  80  *      Set new history interface
  81  */
  82 protected int
  83 hist_set(EditLine *el, hist_fun_t fun, void *ptr)
  84 {
  85
  86         el->el_history.ref = ptr;
  87         el->el_history.fun = fun;
  88         return 0;
  89 }
  90
  91
  92 /* hist_get():
  93  *      Get a history line and update it in the buffer.
  94  *      eventno tells us the event to get.
  95  */
  96 protected el_action_t
  97 hist_get(EditLine *el)
  98 {
  99         const Char *hp;
 100         int h;
 101
 102         if (el->el_history.eventno == 0) {      /* if really the current line */
 103                 (void) Strncpy(el->el_line.buffer, el->el_history.buf,
 104                     el->el_history.sz);
 105                 el->el_line.lastchar = el->el_line.buffer +
 106                     (el->el_history.last - el->el_history.buf);
 107
 108 #ifdef KSHVI
 109                 if (el->el_map.type == MAP_VI)
 110                         el->el_line.cursor = el->el_line.buffer;
 111                 else
 112 #endif /* KSHVI */
 113                         el->el_line.cursor = el->el_line.lastchar;
 114
 115                 return CC_REFRESH;
 116         }
 117         if (el->el_history.ref == NULL)
 118                 return CC_ERROR;
 119
 120         hp = HIST_FIRST(el);
 121
 122         if (hp == NULL)
 123                 return CC_ERROR;
 124
 125         for (h = 1; h < el->el_history.eventno; h++)
 126                 if ((hp = HIST_NEXT(el)) == NULL) {
 127                         el->el_history.eventno = h;
 128                         return CC_ERROR;
 129                 }
 130         (void) Strncpy(el->el_line.buffer, hp,
 131                         (size_t)(el->el_line.limit - el->el_line.buffer));
 132         el->el_line.buffer[el->el_line.limit - el->el_line.buffer - 1] = '\0';
 133         el->el_line.lastchar = el->el_line.buffer + Strlen(el->el_line.buffer);
 134
 135         if (el->el_line.lastchar > el->el_line.buffer
 136             && el->el_line.lastchar[-1] == '\n')
 137                 el->el_line.lastchar--;
 138         if (el->el_line.lastchar > el->el_line.buffer
 139             && el->el_line.lastchar[-1] == ' ')
 140                 el->el_line.lastchar--;
 141 #ifdef KSHVI
 142         if (el->el_map.type == MAP_VI)
 143                 el->el_line.cursor = el->el_line.buffer;
 144         else
 145 #endif /* KSHVI */
 146                 el->el_line.cursor = el->el_line.lastchar;
 147
 148         return CC_REFRESH;
 149 }
 150
 151
 152 /* hist_command()
 153  *      process a history command
 154  */
 155 protected int
 156 hist_command(EditLine *el, int argc, const Char **argv)
 157 {
 158         const Char *str;
 159         int num;
 160         TYPE(HistEvent) ev;
 161
 162         if (el->el_history.ref == NULL)
 163                 return -1;
 164
 165         if (argc == 1 || Strcmp(argv[1], STR("list")) == 0) {
 166                  /* List history entries */
 167
 168                 for (str = HIST_LAST(el); str != NULL; str = HIST_PREV(el))
 169                         (void) fprintf(el->el_outfile, "%d %s",
 170                             el->el_history.ev.num, ct_encode_string(str, &el->el_scratch));
 171                 return 0;
 172         }
 173
 174         if (argc != 3)
 175                 return -1;
 176
 177         num = (int)Strtol(argv[2], NULL, 0);
 178
 179         if (Strcmp(argv[1], STR("size")) == 0)
 180                 return FUNW(history)(el->el_history.ref, &ev, H_SETSIZE, num);
 181
 182         if (Strcmp(argv[1], STR("unique")) == 0)
 183                 return FUNW(history)(el->el_history.ref, &ev, H_SETUNIQUE, num);
 184
 185         return -1;
 186 }
 187
 188 /* hist_enlargebuf()
 189  *      Enlarge history buffer to specified value. Called from el_enlargebufs().
 190  *      Return 0 for failure, 1 for success.
 191  */
 192 protected int
 193 /*ARGSUSED*/
 194 hist_enlargebuf(EditLine *el, size_t oldsz, size_t newsz)
 195 {
 196         Char *newbuf;
 197
 198         newbuf = el_realloc(el->el_history.buf, newsz * sizeof(*newbuf));
 199         if (!newbuf)
 200                 return 0;
 201
 202         (void) memset(&newbuf[oldsz], '\0', (newsz - oldsz) * sizeof(*newbuf));
 203
 204         el->el_history.last = newbuf +
 205                                 (el->el_history.last - el->el_history.buf);
 206         el->el_history.buf = newbuf;
 207         el->el_history.sz  = newsz;
 208
 209         return 1;
 210 }
 211
 212 #ifdef WIDECHAR
 213 protected wchar_t *
 214 hist_convert(EditLine *el, int fn, void *arg)
 215 {
 216         HistEventW ev;
 217         if ((*(el)->el_history.fun)((el)->el_history.ref, &ev, fn, arg) == -1)
 218                 return NULL;
 219         return ct_decode_string((const char *)(const void *)ev.str,
 220             &el->el_scratch);
 221 }
 222 #endif