lib/libedit/src/eln.c

   1 /*      $NetBSD: eln.c,v 1.34 2016/05/09 21:37:34 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  *
  16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  26  * POSSIBILITY OF SUCH DAMAGE.
  27  */
  28 #include "config.h"
  29 #if !defined(lint) && !defined(SCCSID)
  30 __RCSID("$NetBSD: eln.c,v 1.34 2016/05/09 21:37:34 christos Exp $");
  31 #endif /* not lint && not SCCSID */
  32
  33 #include <errno.h>
  34 #include <stdarg.h>
  35 #include <stdio.h>
  36 #include <stdlib.h>
  37
  38 #include "el.h"
  39
  40 int
  41 el_getc(EditLine *el, char *cp)
  42 {
  43         int num_read;
  44         wchar_t wc = 0;
  45
  46         num_read = el_wgetc(el, &wc);
  47         *cp = '\0';
  48         if (num_read <= 0)
  49                 return num_read;
  50         num_read = wctob(wc);
  51         if (num_read == EOF) {
  52                 errno = ERANGE;
  53                 return -1;
  54         } else {
  55                 *cp = (char)num_read;
  56                 return 1;
  57         }
  58 }
  59
  60
  61 void
  62 el_push(EditLine *el, const char *str)
  63 {
  64         /* Using multibyte->wide string decoding works fine under single-byte
  65          * character sets too, and Does The Right Thing. */
  66         el_wpush(el, ct_decode_string(str, &el->el_lgcyconv));
  67 }
  68
  69
  70 const char *
  71 el_gets(EditLine *el, int *nread)
  72 {
  73         const wchar_t *tmp;
  74
  75         tmp = el_wgets(el, nread);
  76         if (tmp != NULL) {
  77             int i;
  78             size_t nwread = 0;
  79
  80             for (i = 0; i < *nread; i++)
  81                 nwread += ct_enc_width(tmp[i]);
  82             *nread = (int)nwread;
  83         }
  84         return ct_encode_string(tmp, &el->el_lgcyconv);
  85 }
  86
  87
  88 int
  89 el_parse(EditLine *el, int argc, const char *argv[])
  90 {
  91         int ret;
  92         const wchar_t **wargv;
  93
  94         wargv = (void *)ct_decode_argv(argc, argv, &el->el_lgcyconv);
  95         if (!wargv)
  96                 return -1;
  97         ret = el_wparse(el, argc, wargv);
  98         el_free(wargv);
  99
 100         return ret;
 101 }
 102
 103
 104 int
 105 el_set(EditLine *el, int op, ...)
 106 {
 107         va_list ap;
 108         int ret;
 109
 110         if (!el)
 111                 return -1;
 112         va_start(ap, op);
 113
 114         switch (op) {
 115         case EL_PROMPT:         /* el_pfunc_t */
 116         case EL_RPROMPT: {
 117                 el_pfunc_t p = va_arg(ap, el_pfunc_t);
 118                 ret = prompt_set(el, p, 0, op, 0);
 119                 break;
 120         }
 121
 122         case EL_RESIZE: {
 123                 el_zfunc_t p = va_arg(ap, el_zfunc_t);
 124                 void *arg = va_arg(ap, void *);
 125                 ret = ch_resizefun(el, p, arg);
 126                 break;
 127         }
 128
 129         case EL_ALIAS_TEXT: {
 130                 el_afunc_t p = va_arg(ap, el_afunc_t);
 131                 void *arg = va_arg(ap, void *);
 132                 ret = ch_aliasfun(el, p, arg);
 133                 break;
 134         }
 135
 136         case EL_PROMPT_ESC:
 137         case EL_RPROMPT_ESC: {
 138                 el_pfunc_t p = va_arg(ap, el_pfunc_t);
 139                 int c = va_arg(ap, int);
 140
 141                 ret = prompt_set(el, p, c, op, 0);
 142                 break;
 143         }
 144
 145         case EL_TERMINAL:       /* const char * */
 146                 ret = el_wset(el, op, va_arg(ap, char *));
 147                 break;
 148
 149         case EL_EDITOR:         /* const wchar_t * */
 150                 ret = el_wset(el, op, ct_decode_string(va_arg(ap, char *),
 151                     &el->el_lgcyconv));
 152                 break;
 153
 154         case EL_SIGNAL:         /* int */
 155         case EL_EDITMODE:
 156         case EL_UNBUFFERED:
 157         case EL_PREP_TERM:
 158                 ret = el_wset(el, op, va_arg(ap, int));
 159                 break;
 160
 161         case EL_BIND:   /* const char * list -> const wchar_t * list */
 162         case EL_TELLTC:
 163         case EL_SETTC:
 164         case EL_ECHOTC:
 165         case EL_SETTY: {
 166                 const char *argv[20];
 167                 int i;
 168                 const wchar_t **wargv;
 169                 for (i = 1; i < (int)__arraycount(argv) - 1; ++i)
 170                         if ((argv[i] = va_arg(ap, const char *)) == NULL)
 171                             break;
 172                 argv[0] = argv[i] = NULL;
 173                 wargv = (void *)ct_decode_argv(i + 1, argv, &el->el_lgcyconv);
 174                 if (!wargv) {
 175                     ret = -1;
 176                     goto out;
 177                 }
 178                 /*
 179                  * AFAIK we can't portably pass through our new wargv to
 180                  * el_wset(), so we have to reimplement the body of
 181                  * el_wset() for these ops.
 182                  */
 183                 switch (op) {
 184                 case EL_BIND:
 185                         wargv[0] = L"bind";
 186                         ret = map_bind(el, i, wargv);
 187                         break;
 188                 case EL_TELLTC:
 189                         wargv[0] = L"telltc";
 190                         ret = terminal_telltc(el, i, wargv);
 191                         break;
 192                 case EL_SETTC:
 193                         wargv[0] = L"settc";
 194                         ret = terminal_settc(el, i, wargv);
 195                         break;
 196                 case EL_ECHOTC:
 197                         wargv[0] = L"echotc";
 198                         ret = terminal_echotc(el, i, wargv);
 199                         break;
 200                 case EL_SETTY:
 201                         wargv[0] = L"setty";
 202                         ret = tty_stty(el, i, wargv);
 203                         break;
 204                 default:
 205                         ret = -1;
 206                 }
 207                 el_free(wargv);
 208                 break;
 209         }
 210
 211         /* XXX: do we need to change el_func_t too? */
 212         case EL_ADDFN: {          /* const char *, const char *, el_func_t */
 213                 const char *args[2];
 214                 el_func_t func;
 215                 wchar_t **wargv;
 216
 217                 args[0] = va_arg(ap, const char *);
 218                 args[1] = va_arg(ap, const char *);
 219                 func = va_arg(ap, el_func_t);
 220
 221                 wargv = ct_decode_argv(2, args, &el->el_lgcyconv);
 222                 if (!wargv) {
 223                     ret = -1;
 224                     goto out;
 225                 }
 226                 /* XXX: The two strdup's leak */
 227                 ret = map_addfunc(el, wcsdup(wargv[0]), wcsdup(wargv[1]),
 228                     func);
 229                 el_free(wargv);
 230                 break;
 231         }
 232         case EL_HIST: {           /* hist_fun_t, const char * */
 233                 hist_fun_t fun = va_arg(ap, hist_fun_t);
 234                 void *ptr = va_arg(ap, void *);
 235                 ret = hist_set(el, fun, ptr);
 236                 el->el_flags |= NARROW_HISTORY;
 237                 break;
 238         }
 239
 240         case EL_GETCFN:         /* el_rfunc_t */
 241                 ret = el_wset(el, op, va_arg(ap, el_rfunc_t));
 242                 break;
 243
 244         case EL_CLIENTDATA:     /* void * */
 245                 ret = el_wset(el, op, va_arg(ap, void *));
 246                 break;
 247
 248         case EL_SETFP: {          /* int, FILE * */
 249                 int what = va_arg(ap, int);
 250                 FILE *fp = va_arg(ap, FILE *);
 251                 ret = el_wset(el, op, what, fp);
 252                 break;
 253         }
 254
 255         case EL_REFRESH:
 256                 re_clear_display(el);
 257                 re_refresh(el);
 258                 terminal__flush(el);
 259                 ret = 0;
 260                 break;
 261
 262         default:
 263                 ret = -1;
 264                 break;
 265         }
 266
 267 out:
 268         va_end(ap);
 269         return ret;
 270 }
 271
 272
 273 int
 274 el_get(EditLine *el, int op, ...)
 275 {
 276         va_list ap;
 277         int ret;
 278
 279         if (!el)
 280                 return -1;
 281
 282         va_start(ap, op);
 283
 284         switch (op) {
 285         case EL_PROMPT:         /* el_pfunc_t * */
 286         case EL_RPROMPT: {
 287                 el_pfunc_t *p = va_arg(ap, el_pfunc_t *);
 288                 ret = prompt_get(el, p, 0, op);
 289                 break;
 290         }
 291
 292         case EL_PROMPT_ESC: /* el_pfunc_t *, char **/
 293         case EL_RPROMPT_ESC: {
 294                 el_pfunc_t *p = va_arg(ap, el_pfunc_t *);
 295                 char *c = va_arg(ap, char *);
 296                 wchar_t wc = 0;
 297                 ret = prompt_get(el, p, &wc, op);
 298                 *c = (char)wc;
 299                 break;
 300         }
 301
 302         case EL_EDITOR: {
 303                 const char **p = va_arg(ap, const char **);
 304                 const wchar_t *pw;
 305                 ret = el_wget(el, op, &pw);
 306                 *p = ct_encode_string(pw, &el->el_lgcyconv);
 307                 if (!el->el_lgcyconv.csize)
 308                         ret = -1;
 309                 break;
 310         }
 311
 312         case EL_TERMINAL:       /* const char ** */
 313                 ret = el_wget(el, op, va_arg(ap, const char **));
 314                 break;
 315
 316         case EL_SIGNAL:         /* int * */
 317         case EL_EDITMODE:
 318         case EL_UNBUFFERED:
 319         case EL_PREP_TERM:
 320                 ret = el_wget(el, op, va_arg(ap, int *));
 321                 break;
 322
 323         case EL_GETTC: {
 324                 char *argv[20];
 325                 static char gettc[] = "gettc";
 326                 int i;
 327                 for (i = 1; i < (int)__arraycount(argv); ++i)
 328                         if ((argv[i] = va_arg(ap, char *)) == NULL)
 329                                 break;
 330                 argv[0] = gettc;
 331                 ret = terminal_gettc(el, i, argv);
 332                 break;
 333         }
 334
 335         case EL_GETCFN:         /* el_rfunc_t */
 336                 ret = el_wget(el, op, va_arg(ap, el_rfunc_t *));
 337                 break;
 338
 339         case EL_CLIENTDATA:     /* void ** */
 340                 ret = el_wget(el, op, va_arg(ap, void **));
 341                 break;
 342
 343         case EL_GETFP: {          /* int, FILE ** */
 344                 int what = va_arg(ap, int);
 345                 FILE **fpp = va_arg(ap, FILE **);
 346                 ret = el_wget(el, op, what, fpp);
 347                 break;
 348         }
 349
 350         default:
 351                 ret = -1;
 352                 break;
 353         }
 354
 355         va_end(ap);
 356         return ret;
 357 }
 358
 359
 360 const LineInfo *
 361 el_line(EditLine *el)
 362 {
 363         const LineInfoW *winfo = el_wline(el);
 364         LineInfo *info = &el->el_lgcylinfo;
 365         size_t offset;
 366         const wchar_t *p;
 367
 368         info->buffer   = ct_encode_string(winfo->buffer, &el->el_lgcyconv);
 369
 370         offset = 0;
 371         for (p = winfo->buffer; p < winfo->cursor; p++)
 372                 offset += ct_enc_width(*p);
 373         info->cursor = info->buffer + offset;
 374
 375         offset = 0;
 376         for (p = winfo->buffer; p < winfo->lastchar; p++)
 377                 offset += ct_enc_width(*p);
 378         info->lastchar = info->buffer + offset;
 379
 380         return info;
 381 }
 382
 383
 384 int
 385 el_insertstr(EditLine *el, const char *str)
 386 {
 387         return el_winsertstr(el, ct_decode_string(str, &el->el_lgcyconv));
 388 }