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1283 mateusz.vi 1 
/* Sved, the SvarDOS editor
2 
 *
3 
 * Copyright (C) 2023 Mateusz Viste
4 
 *
5 
 * Sved is released under the terms of the MIT license.
6 
 *
7 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 
 * of this software and associated documentation files (the "Software"), to
9 
 * deal in the Software without restriction, including without limitation the
10 
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
11 
 * sell copies of the Software, and to permit persons to whom the Software is
12 
 * furnished to do so, subject to the following conditions:
13 
 *
14 
 * The above copyright notice and this permission notice shall be included in
15 
 * all copies or substantial portions of the Software.
16 
 *
17 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
20 
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
22 
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
23 
 * IN THE SOFTWARE.
24 
 */
1275 mateusz.vi 25 
 
1338 mateusz.vi 26 
#include <dos.h>      /* _dos_open(), _dos_read(), _dos_close(), ... */
27 
#include <fcntl.h>    /* O_RDONLY, O_WRONLY */
1275 mateusz.vi 28 
#include <stdlib.h>
29 
#include <string.h>
30 
 
1312 mateusz.vi 31 
#include "mdr\bios.h"
1275 mateusz.vi 32 
#include "mdr\cout.h"
1307 mateusz.vi 33 
#include "mdr\dos.h"
1275 mateusz.vi 34 
#include "mdr\keyb.h"
35 
 
1282 mateusz.vi 36 
#include "svarlang\svarlang.h"
37 
 
1326 mateusz.vi 38 
 
39 
/*****************************************************************************
40 
 * global variables and definitions                                          *
41 
 *****************************************************************************/
42 
 
1275 mateusz.vi 43 
/* preload the mono scheme (to be overloaded at runtime if color adapter present) */
1333 mateusz.vi 44 
static unsigned char SCHEME_TEXT   = 0x07,
45 
                     SCHEME_STBAR1 = 0x70,
46 
                     SCHEME_STBAR2 = 0x70,
47 
                     SCHEME_STBAR3 = 0xf0,
48 
                     SCHEME_SCROLL = 0x70,
49 
                     SCHEME_MSG    = 0x70,
50 
                     SCHEME_ERR    = 0xf0;
1327 mateusz.vi 51 
 
1326 mateusz.vi 52 
static unsigned char screenw, screenh;
1275 mateusz.vi 53 
 
1327 mateusz.vi 54 
static struct {
55 
    unsigned char from;
56 
    unsigned char to;
1342 mateusz.vi 57 
    unsigned char statusbar;
58 
} uidirty = {0, 0xff, 1}; /* make sure to redraw entire UI at first run */
1327 mateusz.vi 59 
 
1275 mateusz.vi 60 
#define SCROLL_CURSOR 0xB1
61 
 
62 
struct line {
1288 mateusz.vi 63 
  struct line far *prev;
64 
  struct line far *next;
1275 mateusz.vi 65 
  unsigned short len;
66 
  char payload[1];
67 
};
68 
 
1315 mateusz.vi 69 
struct file {
1320 mateusz.vi 70 
  int fd;
1288 mateusz.vi 71 
  struct line far *cursor;
1275 mateusz.vi 72 
  unsigned short xoffset;
1316 mateusz.vi 73 
  unsigned char cursorposx;
74 
  unsigned char cursorposy;
1328 mateusz.vi 75 
  unsigned short totlines;
76 
  unsigned short curline;
1330 mateusz.vi 77 
  char lfonly;   /* set if line endings are LF (CR/LF otherwise) */
78 
  char modflag;  /* non-zero if file has been modified since last save */
1332 mateusz.vi 79 
  char fname[128];
1275 mateusz.vi 80 
};
81 
 
82 
 
1326 mateusz.vi 83 
/*****************************************************************************
84 
 * functions                                                                 *
85 
 *****************************************************************************/
86 
 
1339 mateusz.vi 87 
static struct line far *line_calloc(unsigned short siz) {
1342 mateusz.vi 88 
  struct line far *res;
1339 mateusz.vi 89 
  unsigned int seg;
1341 mateusz.vi 90 
  if (_dos_allocmem((sizeof(struct line) + siz + 15) / 16, &seg) != 0) return(NULL);
1342 mateusz.vi 91 
  res = MK_FP(seg, 0);
92 
  _fmemset(res, 0, sizeof(struct line) + siz);
1339 mateusz.vi 93 
  return(MK_FP(seg, 0));
94 
}
95 
 
96 
 
97 
static void line_free(struct line far *ptr) {
98 
  _dos_freemem(FP_SEG(ptr));
99 
}
100 
 
101 
 
1340 mateusz.vi 102 
static signed char curline_resize(struct file far *db, unsigned short newsiz) {
1339 mateusz.vi 103 
  unsigned int maxavail;
104 
  struct line far *newptr;
105 
 
1341 mateusz.vi 106 
  /* try resizing the block (much faster) */
107 
  if (_dos_setblock((sizeof(struct line) + newsiz + 15) / 16, FP_SEG(db->cursor), &maxavail) == 0) return(0);
1339 mateusz.vi 108 
 
109 
  /* create a new block and copy data over */
110 
  newptr = line_calloc(newsiz);
1340 mateusz.vi 111 
  if (newptr == NULL) return(-1);
112 
  _fmemmove(newptr, db->cursor, sizeof(struct line) + db->cursor->len);
113 
 
114 
  /* rewire the linked list */
115 
  db->cursor = newptr;
116 
  if (newptr->next) newptr->next->prev = newptr;
117 
  if (newptr->prev) newptr->prev->next = newptr;
118 
 
119 
  return(0);
1339 mateusz.vi 120 
}
121 
 
122 
 
1328 mateusz.vi 123 
/* adds a new line at cursor position into file linked list and advance cursor
1324 mateusz.vi 124 
 * returns non-zero on error */
1328 mateusz.vi 125 
static int line_add(struct file *db, const char far *line, unsigned short slen) {
1288 mateusz.vi 126 
  struct line far *l;
1275 mateusz.vi 127 
 
1339 mateusz.vi 128 
  l = line_calloc(slen);
1287 mateusz.vi 129 
  if (l == NULL) return(-1);
130 
 
1275 mateusz.vi 131 
  l->prev = db->cursor;
132 
  if (db->cursor) {
133 
    l->next = db->cursor->next;
134 
    db->cursor->next = l;
135 
    l->next->prev = l;
136 
  }
137 
  db->cursor = l;
1342 mateusz.vi 138 
  if (slen > 0) {
139 
    _fmemmove(l->payload, line, slen);
140 
    l->len = slen;
141 
  }
1287 mateusz.vi 142 
 
1328 mateusz.vi 143 
  db->totlines += 1;
144 
  db->curline += 1;
145 
 
1287 mateusz.vi 146 
  return(0);
1275 mateusz.vi 147 
}
148 
 
149 
 
1332 mateusz.vi 150 
static void ui_getstring(const char *query, char *s, unsigned char maxlen) {
151 
  unsigned char len = 0, y, x;
152 
  int k;
153 
 
154 
  if (maxlen == 0) return;
155 
  maxlen--; /* make room for the nul terminator */
156 
 
157 
  y = screenh - 1;
158 
 
159 
  /* print query string */
1333 mateusz.vi 160 
  x = mdr_cout_str(y, 0, query, SCHEME_STBAR3, 40);
161 
  mdr_cout_char_rep(y, x++, ' ', SCHEME_STBAR3, screenw - x);
1332 mateusz.vi 162 
 
163 
  for (;;) {
164 
    mdr_cout_locate(y, x + len);
165 
    k = keyb_getkey();
166 
 
1345 mateusz.vi 167 
    switch (k) {
168 
      case 0x1b: /* ESC */
169 
        s[0] = 0;
170 
        return;
171 
      case '\r':
172 
        s[len] = 0;
173 
        return;
174 
      case 0x08: /* BKSPC */
175 
        if (len > 0) {
176 
          len--;
177 
          mdr_cout_char(y, x + len, ' ', SCHEME_STBAR3);
178 
        }
179 
        break;
180 
      default:
181 
        if ((k <= 0xff) && (k >= ' ') && (len < maxlen)) {
182 
          mdr_cout_char(y, x + len, k, SCHEME_STBAR3);
183 
          s[len++] = k;
184 
        }
1332 mateusz.vi 185 
    }
1345 mateusz.vi 186 
  }
1332 mateusz.vi 187 
 
188 
}
189 
 
190 
 
1324 mateusz.vi 191 
/* append a nul-terminated string to line at cursor position */
192 
static int line_append(struct file *f, const char far *buf, unsigned short len) {
193 
  if (sizeof(struct line) + f->cursor->len + len < len) return(-1); /* overflow check */
1340 mateusz.vi 194 
  if (curline_resize(f, f->cursor->len + len) != 0) return(-1);
1337 mateusz.vi 195 
  _fmemmove(f->cursor->payload + f->cursor->len, buf, len);
1324 mateusz.vi 196 
  f->cursor->len += len;
197 
 
198 
  return(0);
199 
}
200 
 
201 
 
1315 mateusz.vi 202 
static void db_rewind(struct file *db) {
1275 mateusz.vi 203 
  if (db->cursor == NULL) return;
204 
  while (db->cursor->prev) db->cursor = db->cursor->prev;
1328 mateusz.vi 205 
  db->curline = 0;
1275 mateusz.vi 206 
}
207 
 
208 
 
1326 mateusz.vi 209 
static void ui_basic(const struct file *db) {
1302 mateusz.vi 210 
  const char *s = svarlang_strid(0); /* HELP */
1335 mateusz.vi 211 
  unsigned char helpcol = screenw - strlen(s);
1275 mateusz.vi 212 
 
1330 mateusz.vi 213 
  /* fill status bar with background (without modflag as it is refreshed by ui_refresh) */
1333 mateusz.vi 214 
  mdr_cout_char_rep(screenh - 1, 1, ' ', SCHEME_STBAR1, screenw - 1);
1313 mateusz.vi 215 
 
216 
  /* filename */
1330 mateusz.vi 217 
  {
218 
    const char *fn = db->fname;
219 
    if (*fn == 0) fn = svarlang_str(0, 1);
1333 mateusz.vi 220 
    mdr_cout_str(screenh - 1, 1, fn, SCHEME_STBAR1, screenw);
1321 mateusz.vi 221 
  }
1313 mateusz.vi 222 
 
223 
  /* eol type */
1330 mateusz.vi 224 
  {
225 
    const char *eoltype = "CRLF";
226 
    if (db->lfonly) eoltype = "LF";
1335 mateusz.vi 227 
    mdr_cout_str(screenh - 1, helpcol - 6, eoltype, SCHEME_STBAR1, 5);
1275 mateusz.vi 228 
  }
1313 mateusz.vi 229 
 
1335 mateusz.vi 230 
  mdr_cout_str(screenh - 1, helpcol, s, SCHEME_STBAR2, 40);
1275 mateusz.vi 231 
}
232 
 
233 
 
1331 mateusz.vi 234 
static void ui_msg(const char *msg1, const char *msg2, unsigned char attr) {
1312 mateusz.vi 235 
  unsigned short x, y, msglen, i;
1331 mateusz.vi 236 
  unsigned char msg2flag = 0;
237 
 
238 
  msglen = strlen(msg1);
239 
  if (msg2) {
240 
    msg2flag = 1;
241 
    i = strlen(msg2);
242 
    if (i > msglen) msglen = i;
243 
  }
244 
 
245 
  y = (screenh - 6) >> 1;
1312 mateusz.vi 246 
  x = (screenw - msglen - 4) >> 1;
1331 mateusz.vi 247 
  for (i = y+2+msg2flag; i >= y; i--) mdr_cout_char_rep(i, x, ' ', attr, msglen + 2);
248 
  x++;
1345 mateusz.vi 249 
 
1331 mateusz.vi 250 
  mdr_cout_str(y+1, x, msg1, attr, msglen);
251 
  if (msg2) mdr_cout_str(y+2, x, msg2, attr, msglen);
1312 mateusz.vi 252 
 
1327 mateusz.vi 253 
  if (uidirty.from > y) uidirty.from = y;
1331 mateusz.vi 254 
  if (uidirty.to < y+4) uidirty.to = y+4;
1312 mateusz.vi 255 
}
256 
 
257 
 
1342 mateusz.vi 258 
static unsigned char ui_confirm_if_unsaved(struct file *db) {
259 
  if (db->modflag == 0) return(0);
260 
 
261 
  /* if file has been modified then ask for confirmation */
262 
  ui_msg(svarlang_str(0,4), svarlang_str(0,5), SCHEME_MSG);
263 
  if (keyb_getkey() == '\r') return(0);
264 
 
265 
  return(1);
266 
}
267 
 
268 
 
1326 mateusz.vi 269 
static void ui_help(void) {
1309 mateusz.vi 270 
#define MAXLINLEN 35
1336 mateusz.vi 271 
  unsigned char i, offset;
1325 mateusz.vi 272 
  offset = (screenw - MAXLINLEN + 2) >> 1;
1335 mateusz.vi 273 
 
274 
  for (i = 2; i < 18; i++) {
1333 mateusz.vi 275 
    mdr_cout_char_rep(i, offset - 2, ' ', SCHEME_STBAR1, MAXLINLEN + 2);
1309 mateusz.vi 276 
  }
277 
 
1335 mateusz.vi 278 
  for (i = 0; i < 20; i++) {
1337 mateusz.vi 279 
    const char *s = svarlang_str(8, i);
1335 mateusz.vi 280 
    if (s[0] == 0) break;
281 
    if (s[0] == '.') continue;
1336 mateusz.vi 282 
    mdr_cout_locate(3 + i, offset + mdr_cout_str(3 + i, offset, s, SCHEME_STBAR1, MAXLINLEN));
1309 mateusz.vi 283 
  }
284 
 
285 
  keyb_getkey();
286 
#undef MAXLINLEN
287 
}
288 
 
289 
 
1327 mateusz.vi 290 
static void ui_refresh(const struct file *db) {
1318 mateusz.vi 291 
  unsigned char x;
1310 mateusz.vi 292 
  const struct line far *l;
1316 mateusz.vi 293 
  unsigned char y = db->cursorposy;
1275 mateusz.vi 294 
 
1288 mateusz.vi 295 
#ifdef DBG_REFRESH
1282 mateusz.vi 296 
  static char m = 'a';
297 
  m++;
298 
  if (m > 'z') m = 'a';
1288 mateusz.vi 299 
#endif
1282 mateusz.vi 300 
 
1310 mateusz.vi 301 
  /* rewind cursor line to first line that needs redrawing */
1327 mateusz.vi 302 
  for (l = db->cursor; y > uidirty.from; y--) l = l->prev;
1282 mateusz.vi 303 
 
1310 mateusz.vi 304 
  /* iterate over lines and redraw whatever needs to be redrawn */
305 
  for (; l != NULL; l = l->next, y++) {
306 
 
307 
    /* skip lines that do not need to be refreshed */
1327 mateusz.vi 308 
    if (y < uidirty.from) continue;
309 
    if (y > uidirty.to) break;
1282 mateusz.vi 310 
 
1318 mateusz.vi 311 
    x = 0;
1275 mateusz.vi 312 
    if (db->xoffset < l->len) {
1318 mateusz.vi 313 
      unsigned char i, limit;
314 
      if (l->len - db->xoffset < screenw) {
315 
        limit = l->len;
316 
      } else {
317 
        limit = db->xoffset + screenw - 1;
318 
      }
1333 mateusz.vi 319 
      for (i = db->xoffset; i < limit; i++) mdr_cout_char(y, x++, l->payload[i], SCHEME_TEXT);
1275 mateusz.vi 320 
    }
1282 mateusz.vi 321 
 
1318 mateusz.vi 322 
    /* write empty spaces until end of line */
1333 mateusz.vi 323 
    if (x < screenw - 1) mdr_cout_char_rep(y, x, ' ', SCHEME_TEXT, screenw - 1 - x);
1318 mateusz.vi 324 
 
1288 mateusz.vi 325 
#ifdef DBG_REFRESH
1333 mateusz.vi 326 
    mdr_cout_char(y, 0, m, SCHEME_STBAR1);
1288 mateusz.vi 327 
#endif
1282 mateusz.vi 328 
 
1275 mateusz.vi 329 
    if (y == screenh - 2) break;
330 
  }
1310 mateusz.vi 331 
 
1319 mateusz.vi 332 
  /* fill all lines below if empty (and they need to be redrawn) */
333 
  if (l == NULL) {
1327 mateusz.vi 334 
    while ((y < screenh - 1) && (y < uidirty.to)) {
1333 mateusz.vi 335 
      mdr_cout_char_rep(y++, 0, ' ', SCHEME_TEXT, screenw - 1);
1319 mateusz.vi 336 
    }
1318 mateusz.vi 337 
  }
1328 mateusz.vi 338 
 
1330 mateusz.vi 339 
  /* "file changed" flag */
340 
  {
341 
    char flg = ' ';
342 
    if (db->modflag) flg = '*';
1333 mateusz.vi 343 
    mdr_cout_char(screenh - 1, 0, flg, SCHEME_STBAR1);
1330 mateusz.vi 344 
  }
345 
 
1328 mateusz.vi 346 
  /* scroll bar */
347 
  for (y = 0; y < (screenh - 1); y++) {
1333 mateusz.vi 348 
    mdr_cout_char(y, screenw - 1, SCROLL_CURSOR, SCHEME_SCROLL);
1328 mateusz.vi 349 
  }
350 
 
351 
  /* scroll cursor */
352 
  if (db->totlines >= screenh) {
353 
    unsigned short topline = db->curline - db->cursorposy;
354 
    unsigned short col;
355 
    unsigned short totlines = db->totlines - screenh + 1;
356 
    if (db->totlines - screenh > screenh) {
357 
      col = topline / (totlines / (screenh - 1));
358 
    } else {
359 
      col = topline * (screenh - 1) / totlines;
360 
    }
361 
    if (col >= screenh - 1) col = screenh - 2;
1333 mateusz.vi 362 
    mdr_cout_char(col, screenw - 1, ' ', SCHEME_SCROLL);
1328 mateusz.vi 363 
  }
1275 mateusz.vi 364 
}
365 
 
366 
 
1327 mateusz.vi 367 
static void check_cursor_not_after_eol(struct file *db) {
1316 mateusz.vi 368 
  if (db->xoffset + db->cursorposx <= db->cursor->len) return;
1275 mateusz.vi 369 
 
370 
  if (db->cursor->len < db->xoffset) {
1316 mateusz.vi 371 
    db->cursorposx = 0;
1275 mateusz.vi 372 
    db->xoffset = db->cursor->len;
1327 mateusz.vi 373 
    uidirty.from = 0;
374 
    uidirty.to = 0xff;
1275 mateusz.vi 375 
  } else {
1316 mateusz.vi 376 
    db->cursorposx = db->cursor->len - db->xoffset;
1275 mateusz.vi 377 
  }
378 
}
379 
 
380 
 
1327 mateusz.vi 381 
static void cursor_up(struct file *db) {
1275 mateusz.vi 382 
  if (db->cursor->prev != NULL) {
1328 mateusz.vi 383 
    db->curline -= 1;
1275 mateusz.vi 384 
    db->cursor = db->cursor->prev;
1316 mateusz.vi 385 
    if (db->cursorposy == 0) {
1327 mateusz.vi 386 
      uidirty.from = 0;
387 
      uidirty.to = 0xff;
1275 mateusz.vi 388 
    } else {
1316 mateusz.vi 389 
      db->cursorposy -= 1;
1275 mateusz.vi 390 
    }
391 
  }
392 
}
393 
 
394 
 
1327 mateusz.vi 395 
static void cursor_eol(struct file *db) {
1275 mateusz.vi 396 
  /* adjust xoffset to make sure eol is visible on screen */
1282 mateusz.vi 397 
  if (db->xoffset > db->cursor->len) {
398 
    db->xoffset = db->cursor->len - 1;
1327 mateusz.vi 399 
    uidirty.from = 0;
400 
    uidirty.to = 0xff;
1282 mateusz.vi 401 
  }
402 
 
403 
  if (db->xoffset + screenw - 1 <= db->cursor->len) {
404 
    db->xoffset = db->cursor->len - screenw + 2;
1327 mateusz.vi 405 
    uidirty.from = 0;
406 
    uidirty.to = 0xff;
1282 mateusz.vi 407 
  }
1316 mateusz.vi 408 
  db->cursorposx = db->cursor->len - db->xoffset;
1275 mateusz.vi 409 
}
410 
 
411 
 
1327 mateusz.vi 412 
static void cursor_down(struct file *db) {
1276 mateusz.vi 413 
  if (db->cursor->next != NULL) {
1328 mateusz.vi 414 
    db->curline += 1;
1276 mateusz.vi 415 
    db->cursor = db->cursor->next;
1316 mateusz.vi 416 
    if (db->cursorposy < screenh - 2) {
417 
      db->cursorposy += 1;
1276 mateusz.vi 418 
    } else {
1327 mateusz.vi 419 
      uidirty.from = 0;
420 
      uidirty.to = 0xff;
1276 mateusz.vi 421 
    }
422 
  }
423 
}
424 
 
425 
 
1327 mateusz.vi 426 
static void cursor_left(struct file *db) {
1316 mateusz.vi 427 
  if (db->cursorposx > 0) {
428 
    db->cursorposx -= 1;
1302 mateusz.vi 429 
  } else if (db->xoffset > 0) {
430 
    db->xoffset -= 1;
1327 mateusz.vi 431 
    uidirty.from = 0;
432 
    uidirty.to = 0xff;
1302 mateusz.vi 433 
  } else if (db->cursor->prev != NULL) { /* jump to end of line above */
1327 mateusz.vi 434 
    cursor_up(db);
435 
    cursor_eol(db);
1302 mateusz.vi 436 
  }
437 
}
438 
 
439 
 
1327 mateusz.vi 440 
static void cursor_home(struct file *db) {
1316 mateusz.vi 441 
  db->cursorposx = 0;
1282 mateusz.vi 442 
  if (db->xoffset != 0) {
443 
    db->xoffset = 0;
1327 mateusz.vi 444 
    uidirty.from = 0;
445 
    uidirty.to = 0xff;
1282 mateusz.vi 446 
  }
1276 mateusz.vi 447 
}
448 
 
449 
 
1327 mateusz.vi 450 
static void cursor_right(struct file *db) {
1316 mateusz.vi 451 
  if (db->cursor->len > db->xoffset + db->cursorposx) {
452 
    if (db->cursorposx < screenw - 2) {
453 
      db->cursorposx += 1;
1308 mateusz.vi 454 
    } else {
455 
      db->xoffset += 1;
1327 mateusz.vi 456 
      uidirty.from = 0;
457 
      uidirty.to = 0xff;
1308 mateusz.vi 458 
    }
459 
  } else {
1327 mateusz.vi 460 
    cursor_down(db);
461 
    cursor_home(db);
1308 mateusz.vi 462 
  }
463 
}
464 
 
465 
 
1327 mateusz.vi 466 
static void del(struct file *db) {
1316 mateusz.vi 467 
  if (db->cursorposx + db->xoffset < db->cursor->len) {
468 
    _fmemmove(db->cursor->payload + db->cursorposx + db->xoffset, db->cursor->payload + db->cursorposx + db->xoffset + 1, db->cursor->len - db->cursorposx - db->xoffset);
1292 mateusz.vi 469 
    db->cursor->len -= 1; /* do this AFTER memmove so the copy includes the nul terminator */
1327 mateusz.vi 470 
    uidirty.from = db->cursorposy;
471 
    uidirty.to = db->cursorposy;
1330 mateusz.vi 472 
    db->modflag = 1;
1292 mateusz.vi 473 
  } else if (db->cursor->next != NULL) { /* cursor is at end of line: merge current line with next one (if there is a next one) */
474 
    struct line far *nextline = db->cursor->next;
475 
    if (db->cursor->next->len > 0) {
1340 mateusz.vi 476 
      if (curline_resize(db, db->cursor->len + db->cursor->next->len + 1) == 0) {
1337 mateusz.vi 477 
        _fmemmove(db->cursor->payload + db->cursor->len, db->cursor->next->payload, db->cursor->next->len + 1);
1292 mateusz.vi 478 
        db->cursor->len += db->cursor->next->len;
479 
      }
480 
    }
1340 mateusz.vi 481 
 
1292 mateusz.vi 482 
    db->cursor->next = db->cursor->next->next;
483 
    db->cursor->next->prev = db->cursor;
1340 mateusz.vi 484 
 
1339 mateusz.vi 485 
    line_free(nextline);
1327 mateusz.vi 486 
    uidirty.from = db->cursorposy;
487 
    uidirty.to = 0xff;
1328 mateusz.vi 488 
    db->totlines -= 1;
1330 mateusz.vi 489 
    db->modflag = 1;
1292 mateusz.vi 490 
  }
491 
}
492 
 
493 
 
1327 mateusz.vi 494 
static void bkspc(struct file *db) {
1302 mateusz.vi 495 
 
496 
  /* backspace is basically "left + del", not applicable only if cursor is on 1st byte of the file */
1316 mateusz.vi 497 
  if ((db->cursorposx == 0) && (db->xoffset == 0) && (db->cursor->prev == NULL)) return;
1302 mateusz.vi 498 
 
1327 mateusz.vi 499 
  cursor_left(db);
500 
  del(db);
1302 mateusz.vi 501 
}
502 
 
503 
 
1286 mateusz.vi 504 
/* a custom argv-parsing routine that looks directly inside the PSP, avoids the need
505 
 * of argc and argv, saves some 330 bytes of binary size */
506 
static char *parseargv(void) {
507 
  char *tail = (void *)0x81; /* THIS WORKS ONLY IN SMALL MEMORY MODEL */
508 
  unsigned char count = 0;
509 
  char *argv[4];
510 
 
511 
  while (count < 4) {
512 
    /* jump to nearest arg */
513 
    while (*tail == ' ') {
514 
      *tail = 0;
515 
      tail++;
516 
    }
517 
 
518 
    if (*tail == '\r') {
519 
      *tail = 0;
520 
      break;
521 
    }
522 
 
523 
    argv[count++] = tail;
524 
 
525 
    /* jump to next delimiter */
526 
    while ((*tail != ' ') && (*tail != '\r')) tail++;
527 
  }
528 
 
529 
  /* check args now */
1321 mateusz.vi 530 
  if (count == 0) return("");
1286 mateusz.vi 531 
 
532 
  return(argv[0]);
533 
}
534 
 
535 
 
1320 mateusz.vi 536 
static struct file *loadfile(const char *fname) {
1324 mateusz.vi 537 
  char buff[512]; /* read one entire sector at a time (faster) */
538 
  char *buffptr;
539 
  unsigned int len, llen;
1287 mateusz.vi 540 
  int fd;
1324 mateusz.vi 541 
  unsigned char eolfound;
1339 mateusz.vi 542 
  static struct file db[1];
1287 mateusz.vi 543 
 
1339 mateusz.vi 544 
  bzero(db, sizeof(db));
545 
  memcpy(db->fname, fname, strlen(fname));
1321 mateusz.vi 546 
 
547 
  if (*fname == 0) goto SKIPLOADING;
548 
 
1287 mateusz.vi 549 
  if (_dos_open(fname, O_RDONLY, &fd) != 0) {
550 
    mdr_coutraw_puts("Failed to open file:");
551 
    mdr_coutraw_puts(fname);
1320 mateusz.vi 552 
    return(NULL);
1287 mateusz.vi 553 
  }
554 
 
1313 mateusz.vi 555 
  db->lfonly = 1;
556 
 
1324 mateusz.vi 557 
  /* start by adding an empty line */
1328 mateusz.vi 558 
  if (line_add(db, NULL, 0) != 0) {
1324 mateusz.vi 559 
    /* TODO ERROR HANDLING */
560 
  }
1287 mateusz.vi 561 
 
1324 mateusz.vi 562 
  for (eolfound = 0;;) {
563 
    unsigned short consumedbytes;
564 
 
565 
    if ((_dos_read(fd, buff, sizeof(buff), &len) != 0) || (len == 0)) break;
566 
    buffptr = buff;
567 
 
568 
    FINDLINE:
569 
 
570 
    /* look for nearest \n */
571 
    for (consumedbytes = 0;; consumedbytes++) {
572 
      if (consumedbytes == len) {
573 
        llen = consumedbytes;
574 
        break;
1323 mateusz.vi 575 
      }
1324 mateusz.vi 576 
      if (buffptr[consumedbytes] == '\r') {
577 
        llen = consumedbytes;
578 
        consumedbytes++;
579 
        db->lfonly = 0;
1320 mateusz.vi 580 
        break;
581 
      }
1324 mateusz.vi 582 
      if (buffptr[consumedbytes] == '\n') {
583 
        eolfound = 1;
584 
        llen = consumedbytes;
585 
        consumedbytes++;
586 
        break;
587 
      }
1287 mateusz.vi 588 
    }
1324 mateusz.vi 589 
 
590 
    /* consumedbytes is the amount of bytes processed from buffptr,
591 
     * llen is the length of line's payload (without its line terminator) */
592 
 
593 
    /* append content, if line is non-empty */
594 
    if ((llen > 0) && (line_append(db, buffptr, llen) != 0)) {
1287 mateusz.vi 595 
      mdr_coutraw_puts("out of memory");
1339 mateusz.vi 596 
      goto IOERR;
1287 mateusz.vi 597 
    }
598 
 
1324 mateusz.vi 599 
    /* add a new line if necessary */
600 
    if (eolfound) {
1328 mateusz.vi 601 
      if (line_add(db, NULL, 0) != 0) {
1324 mateusz.vi 602 
      /* TODO ERROR HANDLING */
603 
        mdr_coutraw_puts("out of memory");
1339 mateusz.vi 604 
        goto IOERR;
1324 mateusz.vi 605 
      }
606 
      eolfound = 0;
607 
    }
1287 mateusz.vi 608 
 
1324 mateusz.vi 609 
    /* anything left? process the buffer leftover again */
610 
    if (consumedbytes < len) {
611 
      len -= consumedbytes;
612 
      buffptr += consumedbytes;
613 
      goto FINDLINE;
614 
    }
615 
 
616 
  }
617 
 
1287 mateusz.vi 618 
  _dos_close(fd);
619 
 
1321 mateusz.vi 620 
  SKIPLOADING:
621 
 
1320 mateusz.vi 622 
  /* add an empty line at end if not present already, also rewind cursor to top of file */
1339 mateusz.vi 623 
  if ((db->cursor == NULL) || (db->cursor->len != 0)) line_add(db, NULL, 0);
624 
  db_rewind(db);
1320 mateusz.vi 625 
 
626 
  return(db);
1339 mateusz.vi 627 
 
628 
  IOERR:
629 
  _dos_close(fd);
630 
  return(NULL);
1287 mateusz.vi 631 
}
632 
 
633 
 
1332 mateusz.vi 634 
static int savefile(const struct file *db, const char *newfname) {
1311 mateusz.vi 635 
  int fd;
636 
  const struct line far *l;
637 
  unsigned bytes;
1313 mateusz.vi 638 
  unsigned char eollen;
639 
  unsigned char eolbuf[2];
1332 mateusz.vi 640 
  int errflag = 0;
1313 mateusz.vi 641 
 
1332 mateusz.vi 642 
  /* either create a new file if newfname provided, or... */
643 
  if (newfname) {
644 
    if (_dos_creatnew(newfname, _A_NORMAL, &fd) != 0) return(-1);
645 
  } else { /* ...open db->fname */
646 
    if (_dos_open(db->fname, O_WRONLY, &fd) != 0) return(-1);
1311 mateusz.vi 647 
  }
648 
 
649 
  l = db->cursor;
650 
  while (l->prev) l = l->prev;
651 
 
1313 mateusz.vi 652 
  /* preset line terminators */
653 
  if (db->lfonly) {
654 
    eolbuf[0] = '\n';
655 
    eollen = 1;
656 
  } else {
657 
    eolbuf[0] = '\r';
658 
    eolbuf[1] = '\n';
659 
    eollen = 2;
660 
  }
661 
 
1311 mateusz.vi 662 
  while (l) {
1324 mateusz.vi 663 
    /* do not write the last empty line, it is only useful for edition */
664 
    if (l->len != 0) {
1332 mateusz.vi 665 
      errflag |= _dos_write(fd, l->payload, l->len, &bytes);
1324 mateusz.vi 666 
    } else if (l->next == NULL) {
667 
      break;
668 
    }
1332 mateusz.vi 669 
    errflag |= _dos_write(fd, eolbuf, eollen, &bytes);
1311 mateusz.vi 670 
    l = l->next;
671 
  }
672 
 
1332 mateusz.vi 673 
  errflag |= _dos_close(fd);
1330 mateusz.vi 674 
 
1332 mateusz.vi 675 
  return(errflag);
1311 mateusz.vi 676 
}
677 
 
678 
 
1327 mateusz.vi 679 
static void insert_in_line(struct file *db, const char *databuf, unsigned short len) {
1340 mateusz.vi 680 
  if (curline_resize(db, db->cursor->len + len) == 0) {
1317 mateusz.vi 681 
    unsigned short off = db->xoffset + db->cursorposx;
1330 mateusz.vi 682 
    db->modflag = 1;
1317 mateusz.vi 683 
    _fmemmove(db->cursor->payload + off + len, db->cursor->payload + off, db->cursor->len - off + 1);
684 
    db->cursor->len += len;
1327 mateusz.vi 685 
    uidirty.from = db->cursorposy;
686 
    uidirty.to = db->cursorposy;
1317 mateusz.vi 687 
    while (len--) {
688 
      db->cursor->payload[off++] = *databuf;
689 
      databuf++;
1327 mateusz.vi 690 
      cursor_right(db);
1317 mateusz.vi 691 
    }
692 
  }
693 
}
694 
 
695 
 
1342 mateusz.vi 696 
static void clear_file(struct file *db) {
697 
 
698 
  /* free the entire linked list of lines */
699 
  db_rewind(db);
700 
  while (db->cursor) {
701 
    struct line far *victim;
702 
    victim = db->cursor;
703 
    db->cursor = db->cursor->next;
704 
    line_free(victim);
705 
  }
706 
 
707 
  /* zero out the struct */
708 
  bzero(db, sizeof(struct file));
709 
 
710 
  /* add a single empty line and rewind */
711 
  line_add(db, NULL, 0);
712 
  db_rewind(db);
713 
}
714 
 
715 
 
1343 mateusz.vi 716 
/* recompute db->curline by counting nodes in linked list */
717 
static void recompute_curline(struct file *db) {
718 
  const struct line far *l = db->cursor;
719 
 
720 
  db->curline = 0;
721 
  while (l->prev != NULL) {
722 
    db->curline += 1;
723 
    l = l->prev;
724 
  }
725 
}
726 
 
727 
 
1286 mateusz.vi 728 
int main(void) {
729 
  const char *fname;
1320 mateusz.vi 730 
  struct file *db;
1275 mateusz.vi 731 
 
1307 mateusz.vi 732 
  {
733 
    char nlspath[128], lang[8];
734 
    svarlang_autoload_pathlist("sved", mdr_dos_getenv(nlspath, "NLSPATH", sizeof(nlspath)), mdr_dos_getenv(lang, "LANG", sizeof(lang)));
735 
  }
1282 mateusz.vi 736 
 
1286 mateusz.vi 737 
  fname = parseargv();
738 
 
739 
  if (fname == NULL) {
1302 mateusz.vi 740 
    mdr_coutraw_puts(svarlang_str(1,0)); /* usage: sved file.txt */
1275 mateusz.vi 741 
    return(0);
742 
  }
743 
 
1282 mateusz.vi 744 
  /* load file */
1320 mateusz.vi 745 
  db = loadfile(fname);
746 
  if (db == NULL) return(1);
1282 mateusz.vi 747 
 
1333 mateusz.vi 748 
  if (mdr_cout_init(&screenw, &screenh)) {
749 
    /* load color scheme if mdr_cout_init returns a color flag */
750 
    SCHEME_TEXT = 0x17;
751 
    SCHEME_STBAR1 = 0x70;
752 
    SCHEME_STBAR2 = 0x78;
753 
    SCHEME_STBAR3 = 0xf0;
754 
    SCHEME_SCROLL = 0x70;
755 
    SCHEME_MSG = 0xf0;
756 
    SCHEME_ERR = 0x4f;
757 
  }
1275 mateusz.vi 758 
 
759 
  for (;;) {
760 
    int k;
761 
 
1327 mateusz.vi 762 
    check_cursor_not_after_eol(db);
1320 mateusz.vi 763 
    mdr_cout_locate(db->cursorposy, db->cursorposx);
1275 mateusz.vi 764 
 
1327 mateusz.vi 765 
    if (uidirty.from != 0xff) {
766 
      ui_refresh(db);
767 
      uidirty.from = 0xff;
1282 mateusz.vi 768 
    }
1342 mateusz.vi 769 
    if (uidirty.statusbar) {
770 
      ui_basic(db);
771 
      uidirty.statusbar = 0;
772 
    }
1328 mateusz.vi 773 
#ifdef DBG_LINENUM
774 
      {
775 
        char ddd[10];
776 
        db->curline += 1;
777 
        ddd[0] = '0' + db->curline / 100;
778 
        ddd[1] = '0' + (db->curline % 100) / 10;
779 
        ddd[2] = '0' + (db->curline % 10);
780 
        db->curline -= 1;
781 
        ddd[3] = '/';
782 
        ddd[4] = '0' + db->totlines / 100;
783 
        ddd[5] = '0' + (db->totlines % 100) / 10;
784 
        ddd[6] = '0' + (db->totlines % 10);
785 
        ddd[7] = 0;
1333 mateusz.vi 786 
        mdr_cout_str(screenh - 1, 40, ddd, SCHEME_STBAR1, sizeof(ddd));
1328 mateusz.vi 787 
      }
788 
#endif
1275 mateusz.vi 789 
 
790 
    k = keyb_getkey();
1282 mateusz.vi 791 
 
1275 mateusz.vi 792 
    if (k == 0x150) { /* down */
1327 mateusz.vi 793 
      cursor_down(db);
1275 mateusz.vi 794 
 
795 
    } else if (k == 0x148) { /* up */
1327 mateusz.vi 796 
      cursor_up(db);
1275 mateusz.vi 797 
 
798 
    } else if (k == 0x14D) { /* right */
1327 mateusz.vi 799 
      cursor_right(db);
1275 mateusz.vi 800 
 
801 
    } else if (k == 0x14B) { /* left */
1327 mateusz.vi 802 
      cursor_left(db);
1275 mateusz.vi 803 
 
1282 mateusz.vi 804 
    } else if (k == 0x149) { /* pgup */
1334 mateusz.vi 805 
      unsigned char dist = db->cursorposy + screenh - 1;
806 
      while ((dist != 0) && (db->cursor->prev != NULL)) {
807 
        db->cursor = db->cursor->prev;
808 
        dist--;
809 
      }
810 
      if (dist != 0) {
811 
        db->cursorposy = 0;
812 
        db->cursorposx = 0;
813 
      } else {
814 
        dist = db->cursorposy;
815 
        while ((dist--) && (db->cursor->next)) db->cursor = db->cursor->next;
816 
      }
817 
      uidirty.from = 0;
818 
      uidirty.to = 0xff;
1343 mateusz.vi 819 
      recompute_curline(db);
1282 mateusz.vi 820 
 
821 
    } else if (k == 0x151) { /* pgdown */
1334 mateusz.vi 822 
      unsigned char dist = screenh + screenh - db->cursorposy - 3;
823 
      while ((dist != 0) && (db->cursor->next != NULL)) {
824 
        db->cursor = db->cursor->next;
825 
        dist--;
826 
      }
827 
      if (dist != 0) {
828 
        db->cursorposy = screenh - 2;
829 
        if (db->totlines <= db->cursorposy) db->cursorposy = db->totlines - 1;
830 
        db->cursorposx = 0;
831 
      } else {
832 
        dist = screenh - 2 - db->cursorposy;
833 
        while ((dist--) && (db->cursor->prev)) db->cursor = db->cursor->prev;
834 
      }
835 
      uidirty.from = 0;
836 
      uidirty.to = 0xff;
1343 mateusz.vi 837 
      recompute_curline(db);
1282 mateusz.vi 838 
 
839 
    } else if (k == 0x147) { /* home */
1327 mateusz.vi 840 
       cursor_home(db);
1282 mateusz.vi 841 
 
842 
    } else if (k == 0x14F) { /* end */
1327 mateusz.vi 843 
       cursor_eol(db);
1282 mateusz.vi 844 
 
1275 mateusz.vi 845 
    } else if (k == 0x1B) { /* ESC */
1342 mateusz.vi 846 
      if (ui_confirm_if_unsaved(db) == 0) break;
1275 mateusz.vi 847 
 
1289 mateusz.vi 848 
    } else if (k == 0x0D) { /* ENTER */
1328 mateusz.vi 849 
      unsigned short off = db->xoffset + db->cursorposx;
1289 mateusz.vi 850 
      /* add a new line */
1328 mateusz.vi 851 
      if (line_add(db, db->cursor->payload + off, db->cursor->len - off) == 0) {
1330 mateusz.vi 852 
        db->modflag = 1;
1328 mateusz.vi 853 
        db->cursor = db->cursor->prev; /* back to original line */
1289 mateusz.vi 854 
        /* trim the line above */
1328 mateusz.vi 855 
        db->cursor->len = off;
1289 mateusz.vi 856 
        /* move cursor to the (new) line below */
1343 mateusz.vi 857 
        db->curline -= 1;
1328 mateusz.vi 858 
        uidirty.from = db->cursorposy;
1327 mateusz.vi 859 
        uidirty.to = 0xff;
1328 mateusz.vi 860 
        cursor_down(db);
861 
        cursor_home(db);
1289 mateusz.vi 862 
      } else {
863 
        /* ERROR: OUT OF MEMORY */
864 
      }
865 
 
1292 mateusz.vi 866 
    } else if (k == 0x153) {  /* DEL */
1327 mateusz.vi 867 
      del(db);
1292 mateusz.vi 868 
 
1302 mateusz.vi 869 
    } else if (k == 0x008) { /* BKSPC */
1327 mateusz.vi 870 
      bkspc(db);
1302 mateusz.vi 871 
 
1308 mateusz.vi 872 
    } else if ((k >= 0x20) && (k <= 0xff)) { /* "normal" character */
1317 mateusz.vi 873 
      char c = k;
1327 mateusz.vi 874 
      insert_in_line(db, &c, 1);
1308 mateusz.vi 875 
 
1317 mateusz.vi 876 
    } else if (k == 0x009) { /* TAB */
877 
      const char *tab = "        ";
1327 mateusz.vi 878 
      insert_in_line(db, tab, 8);
1317 mateusz.vi 879 
 
1309 mateusz.vi 880 
    } else if (k == 0x13b) { /* F1 */
1326 mateusz.vi 881 
      ui_help();
1327 mateusz.vi 882 
      uidirty.from = 0;
883 
      uidirty.to = 0xff;
1309 mateusz.vi 884 
 
1342 mateusz.vi 885 
    } else if (k == 0x13c) { /* F2 (new file) */
886 
      if (ui_confirm_if_unsaved(db) == 0) clear_file(db);
887 
      uidirty.from = 0;
888 
      uidirty.to = 0xff;
889 
      uidirty.statusbar = 1;
890 
 
1345 mateusz.vi 891 
    } else if (k == 0x13d) { /* F3 (load file) */
892 
      char fname[25];
893 
 
894 
      /* display a warning if unsaved changes are pending */
895 
      if (db->modflag != 0) ui_msg(svarlang_str(0,4), svarlang_str(0,8), SCHEME_MSG);
896 
 
897 
      /* ask for filename */
898 
      ui_getstring(svarlang_str(0,7), fname, sizeof(fname));
899 
      if (fname[0] != 0) {
900 
        clear_file(db);
901 
        db = loadfile(fname);
902 
      }
903 
      uidirty.from = 0;
904 
      uidirty.to = 0xff;
905 
      uidirty.statusbar = 1;
906 
 
1332 mateusz.vi 907 
    } else if ((k == 0x13f) || (k == 0x140)) { /* F5 or F6 */
908 
      int saveres;
909 
 
910 
      if ((k == 0x140) || (db->fname[0] == 0)) { /* save as... */
911 
        char fname[25];
912 
        ui_getstring(svarlang_str(0,6), fname, sizeof(fname));
913 
        if (*fname == 0) continue;
914 
        saveres = savefile(db, fname);
915 
        if (saveres == 0) memcpy(db->fname, fname, sizeof(fname));
916 
      } else {
917 
        saveres = savefile(db, NULL);
918 
      }
919 
 
920 
      if (saveres == 0) {
1330 mateusz.vi 921 
        db->modflag = 0;
1333 mateusz.vi 922 
        ui_msg(svarlang_str(0, 2), NULL, SCHEME_MSG);
1322 mateusz.vi 923 
        mdr_bios_tickswait(11); /* 11 ticks is about 600 ms */
924 
      } else {
1333 mateusz.vi 925 
        ui_msg(svarlang_str(0, 3), NULL, SCHEME_ERR);
1322 mateusz.vi 926 
        mdr_bios_tickswait(36); /* 2s */
927 
      }
1311 mateusz.vi 928 
 
1332 mateusz.vi 929 
      ui_refresh(db);
1342 mateusz.vi 930 
      uidirty.statusbar = 1;
1332 mateusz.vi 931 
 
1314 mateusz.vi 932 
    } else if (k == 0x144) { /* F10 */
1330 mateusz.vi 933 
      db->modflag = 1;
1320 mateusz.vi 934 
      db->lfonly ^= 1;
1342 mateusz.vi 935 
      uidirty.statusbar = 1;
1314 mateusz.vi 936 
 
1325 mateusz.vi 937 
    } else if (k == 0x174) { /* CTRL+ArrRight - jump to next word */
938 
      /* if currently cursor is on a non-space, then fast-forward to nearest space or EOL */
939 
      for (;;) {
940 
        if (db->xoffset + db->cursorposx == db->cursor->len) break;
941 
        if (db->cursor->payload[db->xoffset + db->cursorposx] == ' ') break;
1327 mateusz.vi 942 
        cursor_right(db);
1325 mateusz.vi 943 
      }
944 
      /* now skip to next non-space or end of file */
945 
      for (;;) {
1327 mateusz.vi 946 
        cursor_right(db);
1325 mateusz.vi 947 
        if (db->cursor->payload[db->xoffset + db->cursorposx] != ' ') break;
948 
        if ((db->cursor->next == NULL) && (db->cursorposx + db->xoffset == db->cursor->len)) break;
949 
      }
950 
 
951 
    } else if (k == 0x173) { /* CTRL+ArrLeft - jump to prev word */
1327 mateusz.vi 952 
      cursor_left(db);
1325 mateusz.vi 953 
      /* if currently cursor is on a space, then fast-forward to nearest non-space or start of line */
954 
      for (;;) {
955 
        if ((db->xoffset == 0) && (db->cursorposx == 0)) break;
956 
        if (db->cursor->payload[db->xoffset + db->cursorposx] != ' ') break;
1327 mateusz.vi 957 
        cursor_left(db);
1325 mateusz.vi 958 
      }
959 
      /* now skip to next space or start of file */
960 
      for (;;) {
1327 mateusz.vi 961 
        cursor_left(db);
1325 mateusz.vi 962 
        if (db->cursor->payload[db->xoffset + db->cursorposx] == ' ') {
1327 mateusz.vi 963 
          cursor_right(db);
1325 mateusz.vi 964 
          break;
965 
        }
966 
        if ((db->cursorposx == 0) && (db->xoffset == 0)) break;
967 
      }
968 
 
1333 mateusz.vi 969 
#ifdef DBG_UNHKEYS
1282 mateusz.vi 970 
    } else { /* UNHANDLED KEY - TODO IGNORE THIS IN PRODUCTION RELEASE */
971 
      char buff[4];
972 
      const char *HEX = "0123456789ABCDEF";
973 
      buff[0] = HEX[(k >> 8) & 15];
974 
      buff[1] = HEX[(k >> 4) & 15];
975 
      buff[2] = HEX[k & 15];
1333 mateusz.vi 976 
      mdr_cout_str(screenh - 1, 0, "UNHANDLED KEY: 0x", SCHEME_STBAR1, 17);
977 
      mdr_cout_str(screenh - 1, 17, buff, SCHEME_STBAR1, 3);
1275 mateusz.vi 978 
      keyb_getkey();
979 
      break;
1333 mateusz.vi 980 
#endif
1275 mateusz.vi 981 
    }
982 
  }
983 
 
984 
  mdr_cout_close();
985 
 
1320 mateusz.vi 986 
  /* no need to free memory, DOS will do it for me */
1275 mateusz.vi 987 
 
988 
  return(0);
989 
}