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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 <string.h>
29 
 
1312 mateusz.vi 30 
#include "mdr\bios.h"
1275 mateusz.vi 31 
#include "mdr\cout.h"
1307 mateusz.vi 32 
#include "mdr\dos.h"
1275 mateusz.vi 33 
#include "mdr\keyb.h"
34 
 
1282 mateusz.vi 35 
#include "svarlang\svarlang.h"
36 
 
1326 mateusz.vi 37 
 
38 
/*****************************************************************************
39 
 * global variables and definitions                                          *
40 
 *****************************************************************************/
41 
 
1275 mateusz.vi 42 
/* preload the mono scheme (to be overloaded at runtime if color adapter present) */
1333 mateusz.vi 43 
static unsigned char SCHEME_TEXT   = 0x07,
1354 mateusz.vi 44 
                     SCHEME_MENU   = 0x70,
45 
                     SCHEME_MENU_CUR= 0x0f,
46 
                     SCHEME_MENU_SEL= 0x00,
1333 mateusz.vi 47 
                     SCHEME_STBAR1 = 0x70,
48 
                     SCHEME_STBAR2 = 0x70,
49 
                     SCHEME_STBAR3 = 0xf0,
50 
                     SCHEME_SCROLL = 0x70,
51 
                     SCHEME_MSG    = 0x70,
52 
                     SCHEME_ERR    = 0xf0;
1327 mateusz.vi 53 
 
1326 mateusz.vi 54 
static unsigned char screenw, screenh;
1275 mateusz.vi 55 
 
1327 mateusz.vi 56 
static struct {
57 
    unsigned char from;
58 
    unsigned char to;
1342 mateusz.vi 59 
    unsigned char statusbar;
60 
} uidirty = {0, 0xff, 1}; /* make sure to redraw entire UI at first run */
1327 mateusz.vi 61 
 
1275 mateusz.vi 62 
#define SCROLL_CURSOR 0xB1
63 
 
64 
struct line {
1288 mateusz.vi 65 
  struct line far *prev;
66 
  struct line far *next;
1275 mateusz.vi 67 
  unsigned short len;
68 
  char payload[1];
69 
};
70 
 
1315 mateusz.vi 71 
struct file {
1288 mateusz.vi 72 
  struct line far *cursor;
1275 mateusz.vi 73 
  unsigned short xoffset;
1348 mateusz.vi 74 
  unsigned short cursorposx;
75 
  unsigned short cursorposy;
1328 mateusz.vi 76 
  unsigned short totlines;
77 
  unsigned short curline;
1330 mateusz.vi 78 
  char lfonly;   /* set if line endings are LF (CR/LF otherwise) */
79 
  char modflag;  /* non-zero if file has been modified since last save */
1355 mateusz.vi 80 
  char modflagprev;
1332 mateusz.vi 81 
  char fname[128];
1275 mateusz.vi 82 
};
83 
 
84 
 
1326 mateusz.vi 85 
/*****************************************************************************
86 
 * functions                                                                 *
87 
 *****************************************************************************/
88 
 
1339 mateusz.vi 89 
static struct line far *line_calloc(unsigned short siz) {
1342 mateusz.vi 90 
  struct line far *res;
1339 mateusz.vi 91 
  unsigned int seg;
1341 mateusz.vi 92 
  if (_dos_allocmem((sizeof(struct line) + siz + 15) / 16, &seg) != 0) return(NULL);
1342 mateusz.vi 93 
  res = MK_FP(seg, 0);
94 
  _fmemset(res, 0, sizeof(struct line) + siz);
1339 mateusz.vi 95 
  return(MK_FP(seg, 0));
96 
}
97 
 
98 
 
99 
static void line_free(struct line far *ptr) {
100 
  _dos_freemem(FP_SEG(ptr));
101 
}
102 
 
103 
 
1348 mateusz.vi 104 
static int curline_resize(struct file far *db, unsigned short newsiz) {
1339 mateusz.vi 105 
  unsigned int maxavail;
106 
  struct line far *newptr;
107 
 
1341 mateusz.vi 108 
  /* try resizing the block (much faster) */
109 
  if (_dos_setblock((sizeof(struct line) + newsiz + 15) / 16, FP_SEG(db->cursor), &maxavail) == 0) return(0);
1339 mateusz.vi 110 
 
111 
  /* create a new block and copy data over */
112 
  newptr = line_calloc(newsiz);
1340 mateusz.vi 113 
  if (newptr == NULL) return(-1);
114 
  _fmemmove(newptr, db->cursor, sizeof(struct line) + db->cursor->len);
115 
 
116 
  /* rewire the linked list */
117 
  db->cursor = newptr;
118 
  if (newptr->next) newptr->next->prev = newptr;
119 
  if (newptr->prev) newptr->prev->next = newptr;
120 
 
121 
  return(0);
1339 mateusz.vi 122 
}
123 
 
124 
 
1328 mateusz.vi 125 
/* adds a new line at cursor position into file linked list and advance cursor
1324 mateusz.vi 126 
 * returns non-zero on error */
1328 mateusz.vi 127 
static int line_add(struct file *db, const char far *line, unsigned short slen) {
1288 mateusz.vi 128 
  struct line far *l;
1275 mateusz.vi 129 
 
1339 mateusz.vi 130 
  l = line_calloc(slen);
1287 mateusz.vi 131 
  if (l == NULL) return(-1);
132 
 
1275 mateusz.vi 133 
  l->prev = db->cursor;
134 
  if (db->cursor) {
135 
    l->next = db->cursor->next;
136 
    db->cursor->next = l;
137 
    l->next->prev = l;
138 
  }
139 
  db->cursor = l;
1342 mateusz.vi 140 
  if (slen > 0) {
141 
    _fmemmove(l->payload, line, slen);
142 
    l->len = slen;
143 
  }
1287 mateusz.vi 144 
 
1328 mateusz.vi 145 
  db->totlines += 1;
146 
  db->curline += 1;
147 
 
1287 mateusz.vi 148 
  return(0);
1275 mateusz.vi 149 
}
150 
 
151 
 
1348 mateusz.vi 152 
static void ui_getstring(const char *query, char *s, unsigned short maxlen) {
153 
  unsigned short len = 0;
154 
  unsigned char y, x;
1332 mateusz.vi 155 
  int k;
156 
 
157 
  if (maxlen == 0) return;
158 
  maxlen--; /* make room for the nul terminator */
159 
 
160 
  y = screenh - 1;
161 
 
162 
  /* print query string */
1333 mateusz.vi 163 
  x = mdr_cout_str(y, 0, query, SCHEME_STBAR3, 40);
164 
  mdr_cout_char_rep(y, x++, ' ', SCHEME_STBAR3, screenw - x);
1332 mateusz.vi 165 
 
166 
  for (;;) {
167 
    mdr_cout_locate(y, x + len);
168 
    k = keyb_getkey();
169 
 
1345 mateusz.vi 170 
    switch (k) {
171 
      case 0x1b: /* ESC */
172 
        s[0] = 0;
173 
        return;
174 
      case '\r':
175 
        s[len] = 0;
176 
        return;
177 
      case 0x08: /* BKSPC */
178 
        if (len > 0) {
179 
          len--;
180 
          mdr_cout_char(y, x + len, ' ', SCHEME_STBAR3);
181 
        }
182 
        break;
183 
      default:
184 
        if ((k <= 0xff) && (k >= ' ') && (len < maxlen)) {
185 
          mdr_cout_char(y, x + len, k, SCHEME_STBAR3);
186 
          s[len++] = k;
187 
        }
1332 mateusz.vi 188 
    }
1345 mateusz.vi 189 
  }
1332 mateusz.vi 190 
 
191 
}
192 
 
193 
 
1324 mateusz.vi 194 
/* append a nul-terminated string to line at cursor position */
195 
static int line_append(struct file *f, const char far *buf, unsigned short len) {
196 
  if (sizeof(struct line) + f->cursor->len + len < len) return(-1); /* overflow check */
1340 mateusz.vi 197 
  if (curline_resize(f, f->cursor->len + len) != 0) return(-1);
1337 mateusz.vi 198 
  _fmemmove(f->cursor->payload + f->cursor->len, buf, len);
1324 mateusz.vi 199 
  f->cursor->len += len;
200 
 
201 
  return(0);
202 
}
203 
 
204 
 
1315 mateusz.vi 205 
static void db_rewind(struct file *db) {
1275 mateusz.vi 206 
  if (db->cursor == NULL) return;
207 
  while (db->cursor->prev) db->cursor = db->cursor->prev;
1328 mateusz.vi 208 
  db->curline = 0;
1275 mateusz.vi 209 
}
210 
 
211 
 
1355 mateusz.vi 212 
static void ui_basic(const struct file *db, unsigned short slotnum) {
1302 mateusz.vi 213 
  const char *s = svarlang_strid(0); /* HELP */
1348 mateusz.vi 214 
  unsigned short helpcol = screenw - strlen(s);
1275 mateusz.vi 215 
 
1355 mateusz.vi 216 
  /* slot number */
217 
  {
218 
    char slot[4] = "#00";
219 
    slotnum++;
220 
    slot[1] += (slotnum / 10);
221 
    slot[2] += (slotnum % 10);
222 
    mdr_cout_str(screenh - 1, 0, slot, SCHEME_STBAR2, 3);
223 
  }
1313 mateusz.vi 224 
 
1355 mateusz.vi 225 
  /* fill rest of status bar with background */
226 
  mdr_cout_char_rep(screenh - 1, 3, ' ', SCHEME_STBAR1, screenw - 1);
227 
 
1313 mateusz.vi 228 
  /* filename */
1330 mateusz.vi 229 
  {
230 
    const char *fn = db->fname;
1355 mateusz.vi 231 
    unsigned short x;
1330 mateusz.vi 232 
    if (*fn == 0) fn = svarlang_str(0, 1);
1355 mateusz.vi 233 
    x = mdr_cout_str(screenh - 1, 4, fn, SCHEME_STBAR1, screenw);
234 
    if (db->modflag) mdr_cout_char(screenh - 1, 5 + x, '*', SCHEME_STBAR1);
1321 mateusz.vi 235 
  }
1313 mateusz.vi 236 
 
237 
  /* eol type */
1330 mateusz.vi 238 
  {
239 
    const char *eoltype = "CRLF";
1353 mateusz.vi 240 
    if (db->lfonly) eoltype += 2;
1335 mateusz.vi 241 
    mdr_cout_str(screenh - 1, helpcol - 6, eoltype, SCHEME_STBAR1, 5);
1275 mateusz.vi 242 
  }
1313 mateusz.vi 243 
 
1335 mateusz.vi 244 
  mdr_cout_str(screenh - 1, helpcol, s, SCHEME_STBAR2, 40);
1275 mateusz.vi 245 
}
246 
 
247 
 
1331 mateusz.vi 248 
static void ui_msg(const char *msg1, const char *msg2, unsigned char attr) {
1312 mateusz.vi 249 
  unsigned short x, y, msglen, i;
1331 mateusz.vi 250 
  unsigned char msg2flag = 0;
251 
 
252 
  msglen = strlen(msg1);
253 
  if (msg2) {
254 
    msg2flag = 1;
255 
    i = strlen(msg2);
256 
    if (i > msglen) msglen = i;
257 
  }
258 
 
259 
  y = (screenh - 6) >> 1;
1312 mateusz.vi 260 
  x = (screenw - msglen - 4) >> 1;
1331 mateusz.vi 261 
  for (i = y+2+msg2flag; i >= y; i--) mdr_cout_char_rep(i, x, ' ', attr, msglen + 2);
262 
  x++;
1345 mateusz.vi 263 
 
1331 mateusz.vi 264 
  mdr_cout_str(y+1, x, msg1, attr, msglen);
265 
  if (msg2) mdr_cout_str(y+2, x, msg2, attr, msglen);
1312 mateusz.vi 266 
 
1327 mateusz.vi 267 
  if (uidirty.from > y) uidirty.from = y;
1331 mateusz.vi 268 
  if (uidirty.to < y+4) uidirty.to = y+4;
1312 mateusz.vi 269 
}
270 
 
271 
 
1342 mateusz.vi 272 
static unsigned char ui_confirm_if_unsaved(struct file *db) {
1355 mateusz.vi 273 
  unsigned char r = 0;
1342 mateusz.vi 274 
  if (db->modflag == 0) return(0);
275 
 
1355 mateusz.vi 276 
  mdr_cout_cursor_hide();
277 
 
1342 mateusz.vi 278 
  /* if file has been modified then ask for confirmation */
279 
  ui_msg(svarlang_str(0,4), svarlang_str(0,5), SCHEME_MSG);
1355 mateusz.vi 280 
  if (keyb_getkey() != '\r') r = 1;
1342 mateusz.vi 281 
 
1355 mateusz.vi 282 
  mdr_cout_cursor_show();
283 
 
284 
  return(r);
1342 mateusz.vi 285 
}
286 
 
287 
 
1327 mateusz.vi 288 
static void ui_refresh(const struct file *db) {
1318 mateusz.vi 289 
  unsigned char x;
1310 mateusz.vi 290 
  const struct line far *l;
1316 mateusz.vi 291 
  unsigned char y = db->cursorposy;
1275 mateusz.vi 292 
 
1288 mateusz.vi 293 
#ifdef DBG_REFRESH
1282 mateusz.vi 294 
  static char m = 'a';
295 
  m++;
296 
  if (m > 'z') m = 'a';
1288 mateusz.vi 297 
#endif
1282 mateusz.vi 298 
 
1310 mateusz.vi 299 
  /* rewind cursor line to first line that needs redrawing */
1327 mateusz.vi 300 
  for (l = db->cursor; y > uidirty.from; y--) l = l->prev;
1282 mateusz.vi 301 
 
1310 mateusz.vi 302 
  /* iterate over lines and redraw whatever needs to be redrawn */
303 
  for (; l != NULL; l = l->next, y++) {
304 
 
305 
    /* skip lines that do not need to be refreshed */
1327 mateusz.vi 306 
    if (y < uidirty.from) continue;
307 
    if (y > uidirty.to) break;
1282 mateusz.vi 308 
 
1318 mateusz.vi 309 
    x = 0;
1275 mateusz.vi 310 
    if (db->xoffset < l->len) {
1318 mateusz.vi 311 
      unsigned char i, limit;
312 
      if (l->len - db->xoffset < screenw) {
313 
        limit = l->len;
314 
      } else {
315 
        limit = db->xoffset + screenw - 1;
316 
      }
1333 mateusz.vi 317 
      for (i = db->xoffset; i < limit; i++) mdr_cout_char(y, x++, l->payload[i], SCHEME_TEXT);
1275 mateusz.vi 318 
    }
1282 mateusz.vi 319 
 
1318 mateusz.vi 320 
    /* write empty spaces until end of line */
1333 mateusz.vi 321 
    if (x < screenw - 1) mdr_cout_char_rep(y, x, ' ', SCHEME_TEXT, screenw - 1 - x);
1318 mateusz.vi 322 
 
1288 mateusz.vi 323 
#ifdef DBG_REFRESH
1333 mateusz.vi 324 
    mdr_cout_char(y, 0, m, SCHEME_STBAR1);
1288 mateusz.vi 325 
#endif
1282 mateusz.vi 326 
 
1275 mateusz.vi 327 
    if (y == screenh - 2) break;
328 
  }
1310 mateusz.vi 329 
 
1319 mateusz.vi 330 
  /* fill all lines below if empty (and they need to be redrawn) */
331 
  if (l == NULL) {
1327 mateusz.vi 332 
    while ((y < screenh - 1) && (y < uidirty.to)) {
1333 mateusz.vi 333 
      mdr_cout_char_rep(y++, 0, ' ', SCHEME_TEXT, screenw - 1);
1319 mateusz.vi 334 
    }
1318 mateusz.vi 335 
  }
1328 mateusz.vi 336 
 
337 
  /* scroll bar */
338 
  for (y = 0; y < (screenh - 1); y++) {
1333 mateusz.vi 339 
    mdr_cout_char(y, screenw - 1, SCROLL_CURSOR, SCHEME_SCROLL);
1328 mateusz.vi 340 
  }
341 
 
342 
  /* scroll cursor */
343 
  if (db->totlines >= screenh) {
344 
    unsigned short topline = db->curline - db->cursorposy;
345 
    unsigned short col;
346 
    unsigned short totlines = db->totlines - screenh + 1;
347 
    if (db->totlines - screenh > screenh) {
348 
      col = topline / (totlines / (screenh - 1));
349 
    } else {
350 
      col = topline * (screenh - 1) / totlines;
351 
    }
352 
    if (col >= screenh - 1) col = screenh - 2;
1333 mateusz.vi 353 
    mdr_cout_char(col, screenw - 1, ' ', SCHEME_SCROLL);
1328 mateusz.vi 354 
  }
1275 mateusz.vi 355 
}
356 
 
357 
 
1327 mateusz.vi 358 
static void check_cursor_not_after_eol(struct file *db) {
1316 mateusz.vi 359 
  if (db->xoffset + db->cursorposx <= db->cursor->len) return;
1275 mateusz.vi 360 
 
361 
  if (db->cursor->len < db->xoffset) {
1316 mateusz.vi 362 
    db->cursorposx = 0;
1275 mateusz.vi 363 
    db->xoffset = db->cursor->len;
1327 mateusz.vi 364 
    uidirty.from = 0;
365 
    uidirty.to = 0xff;
1275 mateusz.vi 366 
  } else {
1316 mateusz.vi 367 
    db->cursorposx = db->cursor->len - db->xoffset;
1275 mateusz.vi 368 
  }
369 
}
370 
 
371 
 
1327 mateusz.vi 372 
static void cursor_up(struct file *db) {
1275 mateusz.vi 373 
  if (db->cursor->prev != NULL) {
1328 mateusz.vi 374 
    db->curline -= 1;
1275 mateusz.vi 375 
    db->cursor = db->cursor->prev;
1316 mateusz.vi 376 
    if (db->cursorposy == 0) {
1327 mateusz.vi 377 
      uidirty.from = 0;
378 
      uidirty.to = 0xff;
1275 mateusz.vi 379 
    } else {
1316 mateusz.vi 380 
      db->cursorposy -= 1;
1275 mateusz.vi 381 
    }
382 
  }
383 
}
384 
 
385 
 
1327 mateusz.vi 386 
static void cursor_eol(struct file *db) {
1275 mateusz.vi 387 
  /* adjust xoffset to make sure eol is visible on screen */
1282 mateusz.vi 388 
  if (db->xoffset > db->cursor->len) {
389 
    db->xoffset = db->cursor->len - 1;
1327 mateusz.vi 390 
    uidirty.from = 0;
391 
    uidirty.to = 0xff;
1282 mateusz.vi 392 
  }
393 
 
394 
  if (db->xoffset + screenw - 1 <= db->cursor->len) {
395 
    db->xoffset = db->cursor->len - screenw + 2;
1327 mateusz.vi 396 
    uidirty.from = 0;
397 
    uidirty.to = 0xff;
1282 mateusz.vi 398 
  }
1316 mateusz.vi 399 
  db->cursorposx = db->cursor->len - db->xoffset;
1275 mateusz.vi 400 
}
401 
 
402 
 
1327 mateusz.vi 403 
static void cursor_down(struct file *db) {
1276 mateusz.vi 404 
  if (db->cursor->next != NULL) {
1328 mateusz.vi 405 
    db->curline += 1;
1276 mateusz.vi 406 
    db->cursor = db->cursor->next;
1316 mateusz.vi 407 
    if (db->cursorposy < screenh - 2) {
408 
      db->cursorposy += 1;
1276 mateusz.vi 409 
    } else {
1327 mateusz.vi 410 
      uidirty.from = 0;
411 
      uidirty.to = 0xff;
1276 mateusz.vi 412 
    }
413 
  }
414 
}
415 
 
416 
 
1327 mateusz.vi 417 
static void cursor_left(struct file *db) {
1316 mateusz.vi 418 
  if (db->cursorposx > 0) {
419 
    db->cursorposx -= 1;
1302 mateusz.vi 420 
  } else if (db->xoffset > 0) {
421 
    db->xoffset -= 1;
1327 mateusz.vi 422 
    uidirty.from = 0;
423 
    uidirty.to = 0xff;
1302 mateusz.vi 424 
  } else if (db->cursor->prev != NULL) { /* jump to end of line above */
1327 mateusz.vi 425 
    cursor_up(db);
426 
    cursor_eol(db);
1302 mateusz.vi 427 
  }
428 
}
429 
 
430 
 
1327 mateusz.vi 431 
static void cursor_home(struct file *db) {
1316 mateusz.vi 432 
  db->cursorposx = 0;
1282 mateusz.vi 433 
  if (db->xoffset != 0) {
434 
    db->xoffset = 0;
1327 mateusz.vi 435 
    uidirty.from = 0;
436 
    uidirty.to = 0xff;
1282 mateusz.vi 437 
  }
1276 mateusz.vi 438 
}
439 
 
440 
 
1327 mateusz.vi 441 
static void cursor_right(struct file *db) {
1316 mateusz.vi 442 
  if (db->cursor->len > db->xoffset + db->cursorposx) {
443 
    if (db->cursorposx < screenw - 2) {
444 
      db->cursorposx += 1;
1308 mateusz.vi 445 
    } else {
446 
      db->xoffset += 1;
1327 mateusz.vi 447 
      uidirty.from = 0;
448 
      uidirty.to = 0xff;
1308 mateusz.vi 449 
    }
450 
  } else {
1327 mateusz.vi 451 
    cursor_down(db);
452 
    cursor_home(db);
1308 mateusz.vi 453 
  }
454 
}
455 
 
456 
 
1327 mateusz.vi 457 
static void del(struct file *db) {
1316 mateusz.vi 458 
  if (db->cursorposx + db->xoffset < db->cursor->len) {
459 
    _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 460 
    db->cursor->len -= 1; /* do this AFTER memmove so the copy includes the nul terminator */
1327 mateusz.vi 461 
    uidirty.from = db->cursorposy;
462 
    uidirty.to = db->cursorposy;
1351 mateusz.vi 463 
    db->modflag = '*';
1292 mateusz.vi 464 
  } else if (db->cursor->next != NULL) { /* cursor is at end of line: merge current line with next one (if there is a next one) */
465 
    struct line far *nextline = db->cursor->next;
466 
    if (db->cursor->next->len > 0) {
1340 mateusz.vi 467 
      if (curline_resize(db, db->cursor->len + db->cursor->next->len + 1) == 0) {
1337 mateusz.vi 468 
        _fmemmove(db->cursor->payload + db->cursor->len, db->cursor->next->payload, db->cursor->next->len + 1);
1292 mateusz.vi 469 
        db->cursor->len += db->cursor->next->len;
470 
      }
471 
    }
1340 mateusz.vi 472 
 
1292 mateusz.vi 473 
    db->cursor->next = db->cursor->next->next;
474 
    db->cursor->next->prev = db->cursor;
1340 mateusz.vi 475 
 
1339 mateusz.vi 476 
    line_free(nextline);
1327 mateusz.vi 477 
    uidirty.from = db->cursorposy;
478 
    uidirty.to = 0xff;
1328 mateusz.vi 479 
    db->totlines -= 1;
1351 mateusz.vi 480 
    db->modflag = '*';
1292 mateusz.vi 481 
  }
482 
}
483 
 
484 
 
1327 mateusz.vi 485 
static void bkspc(struct file *db) {
1302 mateusz.vi 486 
 
487 
  /* backspace is basically "left + del", not applicable only if cursor is on 1st byte of the file */
1316 mateusz.vi 488 
  if ((db->cursorposx == 0) && (db->xoffset == 0) && (db->cursor->prev == NULL)) return;
1302 mateusz.vi 489 
 
1327 mateusz.vi 490 
  cursor_left(db);
491 
  del(db);
1302 mateusz.vi 492 
}
493 
 
494 
 
1286 mateusz.vi 495 
/* a custom argv-parsing routine that looks directly inside the PSP, avoids the need
496 
 * of argc and argv, saves some 330 bytes of binary size */
1352 mateusz.vi 497 
static const char *parseargv(void) {
1286 mateusz.vi 498 
  char *tail = (void *)0x81; /* THIS WORKS ONLY IN SMALL MEMORY MODEL */
1348 mateusz.vi 499 
  unsigned short count = 0;
1352 mateusz.vi 500 
  char *argv[2];
1286 mateusz.vi 501 
 
1352 mateusz.vi 502 
  while (count < 2) {
1286 mateusz.vi 503 
    /* jump to nearest arg */
504 
    while (*tail == ' ') {
505 
      *tail = 0;
506 
      tail++;
507 
    }
508 
 
509 
    if (*tail == '\r') {
510 
      *tail = 0;
511 
      break;
512 
    }
513 
 
514 
    argv[count++] = tail;
515 
 
516 
    /* jump to next delimiter */
517 
    while ((*tail != ' ') && (*tail != '\r')) tail++;
518 
  }
519 
 
520 
  /* check args now */
1321 mateusz.vi 521 
  if (count == 0) return("");
1352 mateusz.vi 522 
  if (count == 1) return(argv[0]);
1286 mateusz.vi 523 
 
1352 mateusz.vi 524 
  return(NULL);
1286 mateusz.vi 525 
}
526 
 
527 
 
1346 mateusz.vi 528 
/* returns 0 on success, 1 on file not found, 2 on other error */
529 
static unsigned char loadfile(struct file *db, const char *fname) {
1324 mateusz.vi 530 
  char buff[512]; /* read one entire sector at a time (faster) */
531 
  char *buffptr;
532 
  unsigned int len, llen;
1287 mateusz.vi 533 
  int fd;
1324 mateusz.vi 534 
  unsigned char eolfound;
1287 mateusz.vi 535 
 
1355 mateusz.vi 536 
  /* free the entire linked list of lines */
537 
  db_rewind(db);
538 
  while (db->cursor) {
539 
    struct line far *victim;
540 
    victim = db->cursor;
541 
    db->cursor = db->cursor->next;
542 
    line_free(victim);
543 
  }
1321 mateusz.vi 544 
 
1355 mateusz.vi 545 
  /* zero out the struct */
546 
  bzero(db, sizeof(struct file));
547 
 
1321 mateusz.vi 548 
  if (*fname == 0) goto SKIPLOADING;
549 
 
1355 mateusz.vi 550 
  memcpy(db->fname, fname, strlen(fname));
551 
 
1287 mateusz.vi 552 
  if (_dos_open(fname, O_RDONLY, &fd) != 0) {
1346 mateusz.vi 553 
    return(1);
1287 mateusz.vi 554 
  }
555 
 
1313 mateusz.vi 556 
  db->lfonly = 1;
557 
 
1324 mateusz.vi 558 
  /* start by adding an empty line */
1328 mateusz.vi 559 
  if (line_add(db, NULL, 0) != 0) {
1324 mateusz.vi 560 
    /* TODO ERROR HANDLING */
561 
  }
1287 mateusz.vi 562 
 
1324 mateusz.vi 563 
  for (eolfound = 0;;) {
564 
    unsigned short consumedbytes;
565 
 
566 
    if ((_dos_read(fd, buff, sizeof(buff), &len) != 0) || (len == 0)) break;
567 
    buffptr = buff;
568 
 
569 
    FINDLINE:
570 
 
571 
    /* look for nearest \n */
572 
    for (consumedbytes = 0;; consumedbytes++) {
573 
      if (consumedbytes == len) {
574 
        llen = consumedbytes;
575 
        break;
1323 mateusz.vi 576 
      }
1324 mateusz.vi 577 
      if (buffptr[consumedbytes] == '\r') {
578 
        llen = consumedbytes;
579 
        consumedbytes++;
580 
        db->lfonly = 0;
1320 mateusz.vi 581 
        break;
582 
      }
1324 mateusz.vi 583 
      if (buffptr[consumedbytes] == '\n') {
584 
        eolfound = 1;
585 
        llen = consumedbytes;
586 
        consumedbytes++;
587 
        break;
588 
      }
1287 mateusz.vi 589 
    }
1324 mateusz.vi 590 
 
591 
    /* consumedbytes is the amount of bytes processed from buffptr,
592 
     * llen is the length of line's payload (without its line terminator) */
593 
 
594 
    /* append content, if line is non-empty */
595 
    if ((llen > 0) && (line_append(db, buffptr, llen) != 0)) {
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) {
1339 mateusz.vi 602 
        goto IOERR;
1324 mateusz.vi 603 
      }
604 
      eolfound = 0;
605 
    }
1287 mateusz.vi 606 
 
1324 mateusz.vi 607 
    /* anything left? process the buffer leftover again */
608 
    if (consumedbytes < len) {
609 
      len -= consumedbytes;
610 
      buffptr += consumedbytes;
611 
      goto FINDLINE;
612 
    }
613 
 
614 
  }
615 
 
1287 mateusz.vi 616 
  _dos_close(fd);
617 
 
1321 mateusz.vi 618 
  SKIPLOADING:
619 
 
1320 mateusz.vi 620 
  /* add an empty line at end if not present already, also rewind cursor to top of file */
1339 mateusz.vi 621 
  if ((db->cursor == NULL) || (db->cursor->len != 0)) line_add(db, NULL, 0);
622 
  db_rewind(db);
1320 mateusz.vi 623 
 
1346 mateusz.vi 624 
  return(0);
1339 mateusz.vi 625 
 
626 
  IOERR:
627 
  _dos_close(fd);
1346 mateusz.vi 628 
  return(2);
1287 mateusz.vi 629 
}
630 
 
631 
 
1332 mateusz.vi 632 
static int savefile(const struct file *db, const char *newfname) {
1311 mateusz.vi 633 
  int fd;
634 
  const struct line far *l;
635 
  unsigned bytes;
1313 mateusz.vi 636 
  unsigned char eollen;
637 
  unsigned char eolbuf[2];
1332 mateusz.vi 638 
  int errflag = 0;
1313 mateusz.vi 639 
 
1332 mateusz.vi 640 
  /* either create a new file if newfname provided, or... */
641 
  if (newfname) {
642 
    if (_dos_creatnew(newfname, _A_NORMAL, &fd) != 0) return(-1);
643 
  } else { /* ...open db->fname */
644 
    if (_dos_open(db->fname, O_WRONLY, &fd) != 0) return(-1);
1311 mateusz.vi 645 
  }
646 
 
647 
  l = db->cursor;
648 
  while (l->prev) l = l->prev;
649 
 
1313 mateusz.vi 650 
  /* preset line terminators */
651 
  if (db->lfonly) {
652 
    eolbuf[0] = '\n';
653 
    eollen = 1;
654 
  } else {
655 
    eolbuf[0] = '\r';
656 
    eolbuf[1] = '\n';
657 
    eollen = 2;
658 
  }
659 
 
1311 mateusz.vi 660 
  while (l) {
1324 mateusz.vi 661 
    /* do not write the last empty line, it is only useful for edition */
662 
    if (l->len != 0) {
1332 mateusz.vi 663 
      errflag |= _dos_write(fd, l->payload, l->len, &bytes);
1324 mateusz.vi 664 
    } else if (l->next == NULL) {
665 
      break;
666 
    }
1332 mateusz.vi 667 
    errflag |= _dos_write(fd, eolbuf, eollen, &bytes);
1311 mateusz.vi 668 
    l = l->next;
669 
  }
670 
 
1332 mateusz.vi 671 
  errflag |= _dos_close(fd);
1330 mateusz.vi 672 
 
1332 mateusz.vi 673 
  return(errflag);
1311 mateusz.vi 674 
}
675 
 
676 
 
1327 mateusz.vi 677 
static void insert_in_line(struct file *db, const char *databuf, unsigned short len) {
1340 mateusz.vi 678 
  if (curline_resize(db, db->cursor->len + len) == 0) {
1317 mateusz.vi 679 
    unsigned short off = db->xoffset + db->cursorposx;
1351 mateusz.vi 680 
    db->modflag = '*';
1317 mateusz.vi 681 
    _fmemmove(db->cursor->payload + off + len, db->cursor->payload + off, db->cursor->len - off + 1);
682 
    db->cursor->len += len;
1327 mateusz.vi 683 
    uidirty.from = db->cursorposy;
684 
    uidirty.to = db->cursorposy;
1317 mateusz.vi 685 
    while (len--) {
686 
      db->cursor->payload[off++] = *databuf;
687 
      databuf++;
1327 mateusz.vi 688 
      cursor_right(db);
1317 mateusz.vi 689 
    }
690 
  }
691 
}
692 
 
693 
 
1343 mateusz.vi 694 
/* recompute db->curline by counting nodes in linked list */
695 
static void recompute_curline(struct file *db) {
696 
  const struct line far *l = db->cursor;
697 
 
698 
  db->curline = 0;
699 
  while (l->prev != NULL) {
700 
    db->curline += 1;
701 
    l = l->prev;
702 
  }
703 
}
704 
 
705 
 
1354 mateusz.vi 706 
enum MENU_ACTION {
707 
  MENU_NONE = 0,
1355 mateusz.vi 708 
  MENU_OPEN = 1,
709 
  MENU_SAVE = 2,
710 
  MENU_SAVEAS = 3,
711 
  MENU_CLOSE = 4,
1354 mateusz.vi 712 
  MENU_CHGEOL = 5,
713 
  MENU_QUIT = 6
714 
};
715 
 
716 
static enum MENU_ACTION ui_menu(void) {
717 
  unsigned short i, curchoice, attr, x, slen;
718 
  uidirty.from = 0;
719 
  uidirty.to = 0xff;
720 
  uidirty.statusbar = 1;
721 
 
722 
  /* find out the longest string */
723 
  slen = 0;
1355 mateusz.vi 724 
  for (i = MENU_OPEN; i <= MENU_QUIT; i++) {
1354 mateusz.vi 725 
    x = strlen(svarlang_str(8, i));
726 
    if (x > slen) slen = x;
727 
  }
728 
 
1355 mateusz.vi 729 
  curchoice = MENU_OPEN;
1354 mateusz.vi 730 
  for (;;) {
731 
    /* render menu */
732 
    for (i = MENU_NONE; i <= MENU_QUIT + 1; i++) {
733 
      mdr_cout_char_rep(i, 0, ' ', SCHEME_MENU, slen+4);
734 
      if (i == curchoice) {
735 
        attr = SCHEME_MENU_CUR;
736 
        mdr_cout_char(i, 1, '>', SCHEME_MENU_SEL);
737 
      } else {
738 
        attr = SCHEME_MENU;
739 
      }
740 
      x = mdr_cout_str(i, 2, svarlang_str(8, i), attr, slen);
741 
      if (i == curchoice) {
742 
        mdr_cout_char_rep(i, x + 2, ' ', SCHEME_MENU_SEL, slen - x + 1);
743 
        mdr_cout_locate(i, x + 2);
744 
      }
745 
    }
746 
    /* wait for key */
747 
    switch (keyb_getkey()) {
748 
      case '\r': return(curchoice); /* ENTER */
749 
      case 0x150: /* down */
750 
        if (curchoice == MENU_QUIT) {
1355 mateusz.vi 751 
          curchoice = MENU_OPEN;
1354 mateusz.vi 752 
        } else {
753 
          curchoice++;
754 
        }
755 
        break;
756 
      case 0x148: /* up */
1355 mateusz.vi 757 
        if (curchoice == MENU_OPEN) {
1354 mateusz.vi 758 
          curchoice = MENU_QUIT;
759 
        } else {
760 
          curchoice--;
761 
        }
762 
        break;
763 
      default: return(MENU_NONE);
764 
    }
765 
  }
766 
}
767 
 
768 
 
1355 mateusz.vi 769 
static struct file *select_slot(struct file *dbarr, unsigned short curfile) {
770 
  uidirty.from = 0;
771 
  uidirty.to = 0xff;
772 
  uidirty.statusbar = 1;
773 
 
774 
  dbarr = &(dbarr[curfile]);
775 
  ui_basic(dbarr, curfile);
776 
  ui_refresh(dbarr);
777 
  return(dbarr);
778 
}
779 
 
780 
 
1347 mateusz.vi 781 
/* main returns nothing, ie. sved always exits with a zero exit code
782 
 * (this saves 20 bytes of executable footprint) */
783 
void main(void) {
1355 mateusz.vi 784 
  static struct file dbarr[10];
1286 mateusz.vi 785 
  const char *fname;
1355 mateusz.vi 786 
  unsigned short curfile;
787 
  struct file *db = dbarr; /* visible file is the first slot by default */
1275 mateusz.vi 788 
 
1307 mateusz.vi 789 
  {
790 
    char nlspath[128], lang[8];
791 
    svarlang_autoload_pathlist("sved", mdr_dos_getenv(nlspath, "NLSPATH", sizeof(nlspath)), mdr_dos_getenv(lang, "LANG", sizeof(lang)));
792 
  }
1282 mateusz.vi 793 
 
1286 mateusz.vi 794 
  fname = parseargv();
795 
 
1350 mateusz.vi 796 
  if ((fname == NULL) || (*fname == '/')) {
1302 mateusz.vi 797 
    mdr_coutraw_puts(svarlang_str(1,0)); /* usage: sved file.txt */
1347 mateusz.vi 798 
    return;
1275 mateusz.vi 799 
  }
800 
 
1355 mateusz.vi 801 
  /* preload all slots with empty files */
802 
  for (curfile = 9;; curfile--) {
803 
    loadfile(&(dbarr[curfile]), "");
804 
    if (curfile == 0) break;
805 
  }
806 
 
807 
  /* load file, if any given */
808 
  if (*fname != 0) {
1346 mateusz.vi 809 
    unsigned char err = loadfile(db, fname);
810 
    if (err == 1) {
811 
      mdr_coutraw_puts(svarlang_str(0,11)); /* file not found */
1347 mateusz.vi 812 
      return;
1346 mateusz.vi 813 
    } else if (err != 0) {
814 
      mdr_coutraw_puts(svarlang_str(0,10)); /* ERROR */
1347 mateusz.vi 815 
      return;
1346 mateusz.vi 816 
    }
817 
  }
1282 mateusz.vi 818 
 
1333 mateusz.vi 819 
  if (mdr_cout_init(&screenw, &screenh)) {
820 
    /* load color scheme if mdr_cout_init returns a color flag */
821 
    SCHEME_TEXT = 0x17;
1354 mateusz.vi 822 
    SCHEME_MENU = 0x70;
823 
    SCHEME_MENU_CUR = 0x2f;
824 
    SCHEME_MENU_SEL = 0x22;
1333 mateusz.vi 825 
    SCHEME_STBAR1 = 0x70;
826 
    SCHEME_STBAR2 = 0x78;
827 
    SCHEME_STBAR3 = 0xf0;
828 
    SCHEME_SCROLL = 0x70;
829 
    SCHEME_MSG = 0xf0;
830 
    SCHEME_ERR = 0x4f;
831 
  }
1275 mateusz.vi 832 
 
833 
  for (;;) {
834 
    int k;
835 
 
1327 mateusz.vi 836 
    check_cursor_not_after_eol(db);
1320 mateusz.vi 837 
    mdr_cout_locate(db->cursorposy, db->cursorposx);
1275 mateusz.vi 838 
 
1327 mateusz.vi 839 
    if (uidirty.from != 0xff) {
840 
      ui_refresh(db);
841 
      uidirty.from = 0xff;
1282 mateusz.vi 842 
    }
1355 mateusz.vi 843 
    if ((uidirty.statusbar != 0) || (db->modflagprev != db->modflag)) {
844 
      ui_basic(db, curfile);
1342 mateusz.vi 845 
      uidirty.statusbar = 0;
1355 mateusz.vi 846 
      db->modflagprev = db->modflag;
1342 mateusz.vi 847 
    }
1328 mateusz.vi 848 
#ifdef DBG_LINENUM
849 
      {
850 
        char ddd[10];
851 
        db->curline += 1;
852 
        ddd[0] = '0' + db->curline / 100;
853 
        ddd[1] = '0' + (db->curline % 100) / 10;
854 
        ddd[2] = '0' + (db->curline % 10);
855 
        db->curline -= 1;
856 
        ddd[3] = '/';
857 
        ddd[4] = '0' + db->totlines / 100;
858 
        ddd[5] = '0' + (db->totlines % 100) / 10;
859 
        ddd[6] = '0' + (db->totlines % 10);
860 
        ddd[7] = 0;
1333 mateusz.vi 861 
        mdr_cout_str(screenh - 1, 40, ddd, SCHEME_STBAR1, sizeof(ddd));
1328 mateusz.vi 862 
      }
863 
#endif
1275 mateusz.vi 864 
 
865 
    k = keyb_getkey();
1282 mateusz.vi 866 
 
1275 mateusz.vi 867 
    if (k == 0x150) { /* down */
1327 mateusz.vi 868 
      cursor_down(db);
1275 mateusz.vi 869 
 
870 
    } else if (k == 0x148) { /* up */
1327 mateusz.vi 871 
      cursor_up(db);
1275 mateusz.vi 872 
 
873 
    } else if (k == 0x14D) { /* right */
1327 mateusz.vi 874 
      cursor_right(db);
1275 mateusz.vi 875 
 
876 
    } else if (k == 0x14B) { /* left */
1327 mateusz.vi 877 
      cursor_left(db);
1275 mateusz.vi 878 
 
1282 mateusz.vi 879 
    } else if (k == 0x149) { /* pgup */
1334 mateusz.vi 880 
      unsigned char dist = db->cursorposy + screenh - 1;
881 
      while ((dist != 0) && (db->cursor->prev != NULL)) {
882 
        db->cursor = db->cursor->prev;
883 
        dist--;
884 
      }
885 
      if (dist != 0) {
886 
        db->cursorposy = 0;
887 
        db->cursorposx = 0;
888 
      } else {
889 
        dist = db->cursorposy;
890 
        while ((dist--) && (db->cursor->next)) db->cursor = db->cursor->next;
891 
      }
892 
      uidirty.from = 0;
893 
      uidirty.to = 0xff;
1343 mateusz.vi 894 
      recompute_curline(db);
1282 mateusz.vi 895 
 
896 
    } else if (k == 0x151) { /* pgdown */
1334 mateusz.vi 897 
      unsigned char dist = screenh + screenh - db->cursorposy - 3;
898 
      while ((dist != 0) && (db->cursor->next != NULL)) {
899 
        db->cursor = db->cursor->next;
900 
        dist--;
901 
      }
902 
      if (dist != 0) {
903 
        db->cursorposy = screenh - 2;
904 
        if (db->totlines <= db->cursorposy) db->cursorposy = db->totlines - 1;
905 
        db->cursorposx = 0;
906 
      } else {
907 
        dist = screenh - 2 - db->cursorposy;
908 
        while ((dist--) && (db->cursor->prev)) db->cursor = db->cursor->prev;
909 
      }
910 
      uidirty.from = 0;
911 
      uidirty.to = 0xff;
1343 mateusz.vi 912 
      recompute_curline(db);
1282 mateusz.vi 913 
 
914 
    } else if (k == 0x147) { /* home */
1327 mateusz.vi 915 
       cursor_home(db);
1282 mateusz.vi 916 
 
917 
    } else if (k == 0x14F) { /* end */
1327 mateusz.vi 918 
       cursor_eol(db);
1282 mateusz.vi 919 
 
1275 mateusz.vi 920 
    } else if (k == 0x1B) { /* ESC */
1354 mateusz.vi 921 
      int quitnow = 0;
922 
      char fname[25];
923 
      int saveflag = 0;
1275 mateusz.vi 924 
 
1354 mateusz.vi 925 
      switch (ui_menu()) {
926 
 
927 
        case MENU_NONE:
928 
          break;
929 
 
930 
        case MENU_OPEN:
931 
          /* display a warning if unsaved changes are pending */
932 
          if (db->modflag != 0) ui_msg(svarlang_str(0,4), svarlang_str(0,8), SCHEME_MSG);
933 
 
934 
          /* ask for filename */
935 
          ui_getstring(svarlang_str(0,7), fname, sizeof(fname));
936 
          if (fname[0] != 0) {
937 
            unsigned char err;
938 
            err = loadfile(db, fname);
939 
            if (err != 0) {
940 
              if (err == 1) {
941 
                ui_msg(svarlang_str(0,11), NULL, SCHEME_ERR); /* file not found */
942 
              } else {
943 
                ui_msg(svarlang_str(0,10), NULL, SCHEME_ERR);  /* ERROR */
944 
              }
945 
              mdr_bios_tickswait(44); /* 3s */
1355 mateusz.vi 946 
              loadfile(db, "");
1354 mateusz.vi 947 
            }
948 
          }
949 
          break;
950 
 
951 
        case MENU_SAVEAS:
952 
          saveflag = 1;
953 
          /* FALLTHRU */
954 
        case MENU_SAVE:
955 
          if ((saveflag != 0) || (db->fname[0] == 0)) { /* save as... */
956 
            ui_getstring(svarlang_str(0,6), fname, sizeof(fname));
957 
            if (*fname == 0) break;
958 
            saveflag = savefile(db, fname);
959 
            if (saveflag == 0) memcpy(db->fname, fname, sizeof(fname));
960 
          } else {
961 
            saveflag = savefile(db, NULL);
962 
          }
963 
 
964 
          if (saveflag == 0) {
965 
            db->modflag = 0;
966 
            ui_msg(svarlang_str(0, 2), NULL, SCHEME_MSG);
967 
            mdr_bios_tickswait(11); /* 11 ticks is about 600 ms */
968 
          } else {
969 
            ui_msg(svarlang_str(0, 3), NULL, SCHEME_ERR);
970 
            mdr_bios_tickswait(36); /* 2s */
971 
          }
972 
          break;
973 
 
1355 mateusz.vi 974 
        case MENU_CLOSE:
975 
          if (ui_confirm_if_unsaved(db) == 0) {
976 
            loadfile(db, "");
977 
          }
978 
          uidirty.from = 0;
979 
          uidirty.to = 0xff;
980 
          uidirty.statusbar = 1;
981 
          break;
982 
 
1354 mateusz.vi 983 
        case MENU_CHGEOL:
984 
          db->modflag = '*';
985 
          db->lfonly ^= 1;
986 
          break;
987 
 
988 
        case MENU_QUIT:
1355 mateusz.vi 989 
          quitnow = 1;
990 
          for (curfile = 0; curfile < 10; curfile++) {
991 
            if (dbarr[curfile].modflag) {
992 
              db = select_slot(dbarr, curfile);
993 
              if (ui_confirm_if_unsaved(db) != 0) quitnow = 0;
994 
            }
995 
          }
1354 mateusz.vi 996 
          break;
997 
      }
998 
 
999 
      if (quitnow) break;
1000 
 
1289 mateusz.vi 1001 
    } else if (k == 0x0D) { /* ENTER */
1328 mateusz.vi 1002 
      unsigned short off = db->xoffset + db->cursorposx;
1289 mateusz.vi 1003 
      /* add a new line */
1328 mateusz.vi 1004 
      if (line_add(db, db->cursor->payload + off, db->cursor->len - off) == 0) {
1351 mateusz.vi 1005 
        db->modflag = '*';
1328 mateusz.vi 1006 
        db->cursor = db->cursor->prev; /* back to original line */
1289 mateusz.vi 1007 
        /* trim the line above */
1328 mateusz.vi 1008 
        db->cursor->len = off;
1289 mateusz.vi 1009 
        /* move cursor to the (new) line below */
1343 mateusz.vi 1010 
        db->curline -= 1;
1328 mateusz.vi 1011 
        uidirty.from = db->cursorposy;
1327 mateusz.vi 1012 
        uidirty.to = 0xff;
1328 mateusz.vi 1013 
        cursor_down(db);
1014 
        cursor_home(db);
1289 mateusz.vi 1015 
      } else {
1016 
        /* ERROR: OUT OF MEMORY */
1017 
      }
1018 
 
1292 mateusz.vi 1019 
    } else if (k == 0x153) {  /* DEL */
1327 mateusz.vi 1020 
      del(db);
1292 mateusz.vi 1021 
 
1302 mateusz.vi 1022 
    } else if (k == 0x008) { /* BKSPC */
1327 mateusz.vi 1023 
      bkspc(db);
1302 mateusz.vi 1024 
 
1308 mateusz.vi 1025 
    } else if ((k >= 0x20) && (k <= 0xff)) { /* "normal" character */
1317 mateusz.vi 1026 
      char c = k;
1327 mateusz.vi 1027 
      insert_in_line(db, &c, 1);
1308 mateusz.vi 1028 
 
1317 mateusz.vi 1029 
    } else if (k == 0x009) { /* TAB */
1348 mateusz.vi 1030 
      insert_in_line(db, "        ", 8);
1317 mateusz.vi 1031 
 
1355 mateusz.vi 1032 
    } else if ((k >= 0x13b) && (k <= 0x144)) { /* F1..F10 */
1033 
      curfile = k - 0x13b;
1034 
      db = select_slot(dbarr, curfile);
1309 mateusz.vi 1035 
 
1325 mateusz.vi 1036 
    } else if (k == 0x174) { /* CTRL+ArrRight - jump to next word */
1037 
      /* if currently cursor is on a non-space, then fast-forward to nearest space or EOL */
1038 
      for (;;) {
1039 
        if (db->xoffset + db->cursorposx == db->cursor->len) break;
1040 
        if (db->cursor->payload[db->xoffset + db->cursorposx] == ' ') break;
1327 mateusz.vi 1041 
        cursor_right(db);
1325 mateusz.vi 1042 
      }
1043 
      /* now skip to next non-space or end of file */
1044 
      for (;;) {
1327 mateusz.vi 1045 
        cursor_right(db);
1325 mateusz.vi 1046 
        if (db->cursor->payload[db->xoffset + db->cursorposx] != ' ') break;
1047 
        if ((db->cursor->next == NULL) && (db->cursorposx + db->xoffset == db->cursor->len)) break;
1048 
      }
1049 
 
1050 
    } else if (k == 0x173) { /* CTRL+ArrLeft - jump to prev word */
1327 mateusz.vi 1051 
      cursor_left(db);
1325 mateusz.vi 1052 
      /* if currently cursor is on a space, then fast-forward to nearest non-space or start of line */
1053 
      for (;;) {
1054 
        if ((db->xoffset == 0) && (db->cursorposx == 0)) break;
1055 
        if (db->cursor->payload[db->xoffset + db->cursorposx] != ' ') break;
1327 mateusz.vi 1056 
        cursor_left(db);
1325 mateusz.vi 1057 
      }
1058 
      /* now skip to next space or start of file */
1059 
      for (;;) {
1327 mateusz.vi 1060 
        cursor_left(db);
1325 mateusz.vi 1061 
        if (db->cursor->payload[db->xoffset + db->cursorposx] == ' ') {
1327 mateusz.vi 1062 
          cursor_right(db);
1325 mateusz.vi 1063 
          break;
1064 
        }
1065 
        if ((db->cursorposx == 0) && (db->xoffset == 0)) break;
1066 
      }
1067 
 
1333 mateusz.vi 1068 
#ifdef DBG_UNHKEYS
1282 mateusz.vi 1069 
    } else { /* UNHANDLED KEY - TODO IGNORE THIS IN PRODUCTION RELEASE */
1070 
      char buff[4];
1071 
      const char *HEX = "0123456789ABCDEF";
1072 
      buff[0] = HEX[(k >> 8) & 15];
1073 
      buff[1] = HEX[(k >> 4) & 15];
1074 
      buff[2] = HEX[k & 15];
1333 mateusz.vi 1075 
      mdr_cout_str(screenh - 1, 0, "UNHANDLED KEY: 0x", SCHEME_STBAR1, 17);
1076 
      mdr_cout_str(screenh - 1, 17, buff, SCHEME_STBAR1, 3);
1275 mateusz.vi 1077 
      keyb_getkey();
1078 
      break;
1333 mateusz.vi 1079 
#endif
1275 mateusz.vi 1080 
    }
1081 
  }
1082 
 
1083 
  mdr_cout_close();
1084 
 
1320 mateusz.vi 1085 
  /* no need to free memory, DOS will do it for me */
1275 mateusz.vi 1086 
 
1347 mateusz.vi 1087 
  return;
1275 mateusz.vi 1088 
}