lib/libedit/eln.c

   1 /*      $NetBSD: eln.c,v 1.14 2012/03/11 21:15:25 christos Exp $        */
   2
   3 /*-
   4  * Copyright (c) 2009 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *        This product includes software developed by the NetBSD
  18  *        Foundation, Inc. and its contributors.
  19  * 4. Neither the name of The NetBSD Foundation nor the names of its
  20  *    contributors may be used to endorse or promote products derived
  21  *    from this software without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  24  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  25  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  26  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  27  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  28  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  29  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  30  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  31  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  32  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  33  * POSSIBILITY OF SUCH DAMAGE.
  34  */
  35 #include "config.h"
  36 #if !defined(lint) && !defined(SCCSID)
  37 __RCSID("$NetBSD: eln.c,v 1.14 2012/03/11 21:15:25 christos Exp $");
  38 #endif /* not lint && not SCCSID */
  39
  40 #include "histedit.h"
  41 #include "el.h"
  42 #include "read.h"
  43 #include <stdarg.h>
  44 #include <stdio.h>
  45 #include <stdlib.h>
  46
  47 public int
  48 el_getc(EditLine *el, char *cp)
  49 {
  50         int num_read;
  51         wchar_t wc = 0;
  52
  53         if (!(el->el_flags & CHARSET_IS_UTF8))
  54                 el->el_flags |= IGNORE_EXTCHARS;
  55         num_read = el_wgetc (el, &wc);
  56         if (!(el->el_flags & CHARSET_IS_UTF8))
  57                 el->el_flags &= ~IGNORE_EXTCHARS;
  58
  59         if (num_read > 0)
  60                 *cp = (char)wc;
  61         return num_read;
  62 }
  63
  64
  65 public void
  66 el_push(EditLine *el, const char *str)
  67 {
  68         /* Using multibyte->wide string decoding works fine under single-byte
  69          * character sets too, and Does The Right Thing. */
  70         el_wpush(el, ct_decode_string(str, &el->el_lgcyconv));
  71 }
  72
  73
  74 public const char *
  75 el_gets(EditLine *el, int *nread)
  76 {
  77         const wchar_t *tmp;
  78
  79         el->el_flags |= IGNORE_EXTCHARS;
  80         tmp = el_wgets(el, nread);
  81         el->el_flags &= ~IGNORE_EXTCHARS;
  82         return ct_encode_string(tmp, &el->el_lgcyconv);
  83 }
  84
  85
  86 public int
  87 el_parse(EditLine *el, int argc, const char *argv[])
  88 {
  89         int ret;
  90         const wchar_t **wargv;
  91
  92         wargv = (const wchar_t **)
  93             ct_decode_argv(argc, argv, &el->el_lgcyconv);
  94         if (!wargv)
  95                 return -1;
  96         ret = el_wparse(el, argc, wargv);
  97         ct_free_argv(wargv);
  98
  99         return ret;
 100 }
 101
 102
 103 public int
 104 el_set(EditLine *el, int op, ...)
 105 {
 106         va_list ap;
 107         int ret;
 108
 109         if (!el)
 110                 return -1;
 111         va_start(ap, op);
 112
 113         switch (op) {
 114         case EL_PROMPT:         /* el_pfunc_t */
 115         case EL_RPROMPT: {
 116                 el_pfunc_t p = va_arg(ap, el_pfunc_t);
 117                 ret = prompt_set(el, p, 0, op, 0);
 118                 break;
 119         }
 120
 121         case EL_RESIZE: {
 122                 el_zfunc_t p = va_arg(ap, el_zfunc_t);
 123                 void *arg = va_arg(ap, void *);
 124                 ret = ch_resizefun(el, p, arg);
 125                 break;
 126         }
 127
 128         case EL_TERMINAL:       /* const char * */
 129                 ret = el_wset(el, op, va_arg(ap, char *));
 130                 break;
 131
 132         case EL_EDITOR:         /* const wchar_t * */
 133                 ret = el_wset(el, op, ct_decode_string(va_arg(ap, char *),
 134                     &el->el_lgcyconv));
 135                 break;
 136
 137         case EL_SIGNAL:         /* int */
 138         case EL_EDITMODE:
 139         case EL_UNBUFFERED:
 140         case EL_PREP_TERM:
 141                 ret = el_wset(el, op, va_arg(ap, int));
 142                 break;
 143
 144         case EL_BIND:   /* const char * list -> const wchar_t * list */
 145         case EL_TELLTC:
 146         case EL_SETTC:
 147         case EL_ECHOTC:
 148         case EL_SETTY: {
 149                 const char *argv[20];
 150                 int i;
 151                 const wchar_t **wargv;
 152                 for (i = 1; i < (int)__arraycount(argv); ++i)
 153                         if ((argv[i] = va_arg(ap, char *)) == NULL)
 154                             break;
 155                 argv[0] = NULL;
 156                 wargv = (const wchar_t **)
 157                     ct_decode_argv(i + 1, argv, &el->el_lgcyconv);
 158                 if (!wargv) {
 159                     ret = -1;
 160                     goto out;
 161                 }
 162                 /*
 163                  * AFAIK we can't portably pass through our new wargv to
 164                  * el_wset(), so we have to reimplement the body of
 165                  * el_wset() for these ops.
 166                  */
 167                 switch (op) {
 168                 case EL_BIND:
 169                         wargv[0] = STR("bind");
 170                         ret = map_bind(el, i, wargv);
 171                         break;
 172                 case EL_TELLTC:
 173                         wargv[0] = STR("telltc");
 174                         ret = terminal_telltc(el, i, wargv);
 175                         break;
 176                 case EL_SETTC:
 177                         wargv[0] = STR("settc");
 178                         ret = terminal_settc(el, i, wargv);
 179                         break;
 180                 case EL_ECHOTC:
 181                         wargv[0] = STR("echotc");
 182                         ret = terminal_echotc(el, i, wargv);
 183                         break;
 184                 case EL_SETTY:
 185                         wargv[0] = STR("setty");
 186                         ret = tty_stty(el, i, wargv);
 187                         break;
 188                 default:
 189                         ret = -1;
 190                 }
 191                 ct_free_argv(wargv);
 192                 break;
 193         }
 194
 195         /* XXX: do we need to change el_func_t too? */
 196         case EL_ADDFN: {          /* const char *, const char *, el_func_t */
 197                 const char *args[2];
 198                 el_func_t func;
 199                 wchar_t **wargv;
 200
 201                 args[0] = va_arg(ap, const char *);
 202                 args[1] = va_arg(ap, const char *);
 203                 func = va_arg(ap, el_func_t);
 204
 205                 wargv = ct_decode_argv(2, args, &el->el_lgcyconv);
 206                 if (!wargv) {
 207                     ret = -1;
 208                     goto out;
 209                 }
 210                 // XXX: The two strdup's leak
 211                 ret = map_addfunc(el, Strdup(wargv[0]), Strdup(wargv[1]),
 212                     func);
 213                 ct_free_argv(wargv);
 214                 break;
 215         }
 216         case EL_HIST: {           /* hist_fun_t, const char * */
 217                 hist_fun_t fun = va_arg(ap, hist_fun_t);
 218                 void *ptr = va_arg(ap, void *);
 219                 ret = hist_set(el, fun, ptr);
 220                 el->el_flags |= NARROW_HISTORY;
 221                 break;
 222         }
 223         /* XXX: do we need to change el_rfunc_t? */
 224         case EL_GETCFN:         /* el_rfunc_t */
 225                 ret = el_wset(el, op, va_arg(ap, el_rfunc_t));
 226                 el->el_flags |= NARROW_READ;
 227                 break;
 228         case EL_CLIENTDATA:     /* void * */
 229                 ret = el_wset(el, op, va_arg(ap, void *));
 230                 break;
 231         case EL_SETFP: {          /* int, FILE * */
 232                 int what = va_arg(ap, int);
 233                 FILE *fp = va_arg(ap, FILE *);
 234                 ret = el_wset(el, op, what, fp);
 235                 break;
 236         }
 237         case EL_PROMPT_ESC: /* el_pfunc_t, char */
 238         case EL_RPROMPT_ESC: {
 239                 el_pfunc_t p = va_arg(ap, el_pfunc_t);
 240                 char c = (char)va_arg(ap, int);
 241                 ret = prompt_set(el, p, c, op, 0);
 242                 break;
 243         }
 244         default:
 245                 ret = -1;
 246                 break;
 247         }
 248
 249 out:
 250         va_end(ap);
 251         return ret;
 252 }
 253
 254
 255 public int
 256 el_get(EditLine *el, int op, ...)
 257 {
 258         va_list ap;
 259         int ret;
 260
 261         if (!el)
 262                 return -1;
 263
 264         va_start(ap, op);
 265
 266         switch (op) {
 267         case EL_PROMPT:         /* el_pfunc_t * */
 268         case EL_RPROMPT: {
 269                 el_pfunc_t *p = va_arg(ap, el_pfunc_t *);
 270                 ret = prompt_get(el, p, 0, op);
 271                 break;
 272         }
 273
 274         case EL_PROMPT_ESC: /* el_pfunc_t *, char **/
 275         case EL_RPROMPT_ESC: {
 276                 el_pfunc_t *p = va_arg(ap, el_pfunc_t *);
 277                 char *c = va_arg(ap, char *);
 278                 wchar_t wc = 0;
 279                 ret = prompt_get(el, p, &wc, op);
 280                 *c = (char)wc;
 281                 break;
 282         }
 283
 284         case EL_EDITOR: {
 285                 const char **p = va_arg(ap, const char **);
 286                 const wchar_t *pw;
 287                 ret = el_wget(el, op, &pw);
 288                 *p = ct_encode_string(pw, &el->el_lgcyconv);
 289                 if (!el->el_lgcyconv.csize)
 290                         ret = -1;
 291                 break;
 292         }
 293
 294         case EL_TERMINAL:       /* const char ** */
 295                 ret = el_wget(el, op, va_arg(ap, const char **));
 296                 break;
 297
 298         case EL_SIGNAL:         /* int * */
 299         case EL_EDITMODE:
 300         case EL_UNBUFFERED:
 301         case EL_PREP_TERM:
 302                 ret = el_wget(el, op, va_arg(ap, int *));
 303                 break;
 304
 305         case EL_GETTC: {
 306                 char *argv[20];
 307                 static char gettc[] = "gettc";
 308                 int i;
 309                 for (i = 1; i < (int)__arraycount(argv); ++i)
 310                         if ((argv[i] = va_arg(ap, char *)) == NULL)
 311                                 break;
 312                 argv[0] = gettc;
 313                 ret = terminal_gettc(el, i, argv);
 314                 break;
 315         }
 316
 317         /* XXX: do we need to change el_rfunc_t? */
 318         case EL_GETCFN:         /* el_rfunc_t */
 319                 ret = el_wget(el, op, va_arg(ap, el_rfunc_t *));
 320                 break;
 321
 322         case EL_CLIENTDATA:     /* void ** */
 323                 ret = el_wget(el, op, va_arg(ap, void **));
 324                 break;
 325
 326         case EL_GETFP: {          /* int, FILE ** */
 327                 int what = va_arg(ap, int);
 328                 FILE **fpp = va_arg(ap, FILE **);
 329                 ret = el_wget(el, op, what, fpp);
 330                 break;
 331         }
 332
 333         default:
 334                 ret = -1;
 335                 break;
 336         }
 337
 338         va_end(ap);
 339         return ret;
 340 }
 341
 342
 343 const LineInfo *
 344 el_line(EditLine *el)
 345 {
 346         const LineInfoW *winfo = el_wline(el);
 347         LineInfo *info = &el->el_lgcylinfo;
 348         size_t offset;
 349         const Char *p;
 350
 351         info->buffer   = ct_encode_string(winfo->buffer, &el->el_lgcyconv);
 352
 353         offset = 0;
 354         for (p = winfo->buffer; p < winfo->cursor; p++)
 355                 offset += ct_enc_width(*p);
 356         info->cursor = info->buffer + offset;
 357
 358         offset = 0;
 359         for (p = winfo->buffer; p < winfo->lastchar; p++)
 360                 offset += ct_enc_width(*p);
 361         info->lastchar = info->buffer + offset;
 362
 363         return info;
 364 }
 365
 366
 367 int
 368 el_insertstr(EditLine *el, const char *str)
 369 {
 370         return el_winsertstr(el, ct_decode_string(str, &el->el_lgcyconv));
 371 }