WebSVN – SvarDOS – Diff – /sved/trunk/sved.c


/* Sved, the SvarDOS editor
 *
 * Copyright (C) 2023 Mateusz Viste
 *
 * Sved is released under the terms of the MIT license.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 */
 
#include <dos.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
 
#include "mdr\cout.h"
#include "mdr\keyb.h"
 
#include "svarlang\svarlang.h"
 
#define COL_TXT        0
#define COL_STATUSBAR1 1
#define COL_STATUSBAR2 2
#define COL_SCROLLBAR  3
/* preload the mono scheme (to be overloaded at runtime if color adapter present) */
static unsigned char scheme[] = {0x07, 0x70, 0x70, 0x70};
 
#define SCROLL_CURSOR 0xB1
 
 
struct line {
  struct line *prev;
  struct line *next;
  unsigned short len;
  char payload[1];
};
 
struct linedb {
  struct line *topscreen;
  struct line *cursor;
  unsigned short xoffset;
};
 
 
 
void line_add(struct linedb *db, const char *line) {
  unsigned short slen = strlen(line);
  struct line *l;
 
  /* trim out CR/LF line endings */
  if ((slen >= 2) && (line[slen - 2] == '\r')) {
    slen -= 2;
  } else if ((slen >= 1) && (line[slen - 1] == '\n')) {
    slen--;
  }
 
  l =  calloc(1, sizeof(struct line) + slen + 1);
  l->prev = db->cursor;
  if (db->cursor) {
    l->next = db->cursor->next;
    db->cursor->next = l;
    l->next->prev = l;
  }
  db->cursor = l;
  memmove(l->payload, line, slen);
  l->len = slen;
}
 
 
void db_rewind(struct linedb *db) {
  if (db->cursor == NULL) return;
  while (db->cursor->prev) db->cursor = db->cursor->prev;
  db->topscreen = db->cursor;
}
 
 
void load_colorscheme(void) {
  scheme[COL_TXT] = 0x17;
  scheme[COL_STATUSBAR1] = 0x70;
  scheme[COL_STATUSBAR2] = 0x78;
  scheme[COL_SCROLLBAR] = 0x70;
}
 
 
static void ui_basic(unsigned char screenw, unsigned char screenh, const char *fname) {
  unsigned char i;
  const char *s = "HELP";
  unsigned char helpcol = screenw - (strlen(s) + 4);
 
  /* clear screen */
  mdr_cout_cls(scheme[COL_TXT]);
 
  /* status bar */
  for (i = 0; i < helpcol; i++) {
    mdr_cout_char(screenh - 1, i, *fname, scheme[COL_STATUSBAR1]);
    if (*fname != 0) fname++;
  }
  mdr_cout_str(screenh - 1, helpcol, " F1=", scheme[COL_STATUSBAR2], 40);
  mdr_cout_str(screenh - 1, helpcol + 4, s, scheme[COL_STATUSBAR2], 40);
 
  /* scroll bar */
  for (i = 0; i < (screenh - 1); i++) {
    mdr_cout_char(i, screenw - 1, SCROLL_CURSOR, scheme[COL_SCROLLBAR]);
  }
}
 
 
static void ui_refresh(const struct linedb *db, unsigned char screenw, unsigned char screenh, unsigned char uidirtyfrom, unsigned char uidirtyto) {
  unsigned char y = 0;
  unsigned char len;
  struct line *l;
 
  /* DEBUG TODO FIXME */
  static char m = 'a';
  m++;
  if (m > 'z') m = 'a';
 
  for (l = db->topscreen; l != NULL; l = l->next) {
 
    /* skip lines that do not to be refreshed */
    if ((y < uidirtyfrom) || (y > uidirtyto)) continue;
 
    if (db->xoffset < l->len) {
      len = mdr_cout_str(y, 0, l->payload + db->xoffset, scheme[COL_TXT], screenw - 1);
    } else {
      len = 0;
    }
    while (len < screenw - 1) mdr_cout_char(y, len++, ' ', scheme[COL_TXT]);
 
    /* FIXME DEBUG */
    mdr_cout_char(y, 0, m, scheme[COL_STATUSBAR1]);
 
    if (y == screenh - 2) break;
    y++;
  }
}
 
 
static void check_cursor_not_after_eol(struct linedb *db, unsigned char *cursorpos, unsigned char *uidirtyfrom, unsigned char *uidirtyto) {
  if (db->xoffset + *cursorpos <= db->cursor->len) return;
 
  if (db->cursor->len < db->xoffset) {
    *cursorpos = 0;
    db->xoffset = db->cursor->len;
    *uidirtyfrom = 0;
    *uidirtyto = 0xff;
  } else {
    *cursorpos = db->cursor->len - db->xoffset;
  }
}
 
 
static void cursor_up(struct linedb *db, unsigned char *cursorposy, unsigned char *uidirtyfrom, unsigned char *uidirtyto) {
  if (db->cursor->prev != NULL) {
    db->cursor = db->cursor->prev;
    if (*cursorposy == 0) {
      db->topscreen = db->cursor;
      *uidirtyfrom = 0;
      *uidirtyto = 0xff;
    } else {
      *cursorposy -= 1;
    }
  }
}
 
 
static void cursor_eol(struct linedb *db, unsigned char *cursorposx, unsigned char screenw, unsigned char *uidirtyfrom, unsigned char *uidirtyto) {
  /* adjust xoffset to make sure eol is visible on screen */
  if (db->xoffset > db->cursor->len) {
    db->xoffset = db->cursor->len - 1;
    *uidirtyfrom = 0;
    *uidirtyto = 0xff;
  }
 
  if (db->xoffset + screenw - 1 <= db->cursor->len) {
    db->xoffset = db->cursor->len - screenw + 2;
    *uidirtyfrom = 0;
    *uidirtyto = 0xff;
  }
  *cursorposx = db->cursor->len - db->xoffset;
}
 
 
static void cursor_down(struct linedb *db, unsigned char *cursorposy, unsigned char screenh, unsigned char *uidirtyfrom, unsigned char *uidirtyto) {
  if (db->cursor->next != NULL) {
    db->cursor = db->cursor->next;
    if (*cursorposy < screenh - 2) {
      *cursorposy += 1;
    } else {
      db->topscreen = db->topscreen->next;
      *uidirtyfrom = 0;
      *uidirtyto = 0xff;
    }
  }
}
 
 
static void cursor_home(struct linedb *db, unsigned char *cursorposx, unsigned char *uidirtyfrom, unsigned char *uidirtyto) {
  *cursorposx = 0;
  if (db->xoffset != 0) {
    db->xoffset = 0;
    *uidirtyfrom = 0;
    *uidirtyto = 0xff;
  }
}
 
 
/* a custom argv-parsing routine that looks directly inside the PSP, avoids the need
 * of argc and argv, saves some 330 bytes of binary size */
static char *parseargv(void) {
  char *tail = (void *)0x81; /* THIS WORKS ONLY IN SMALL MEMORY MODEL */
  unsigned char count = 0;
  char *argv[4];
 
  mdr_coutraw_puts(tail);
 
  while (count < 4) {
    /* jump to nearest arg */
    while (*tail == ' ') {
      *tail = 0;
      tail++;
    }
 
    if (*tail == '\r') {
      *tail = 0;
      break;
    }
 
    argv[count++] = tail;
 
    /* jump to next delimiter */
    while ((*tail != ' ') && (*tail != '\r')) tail++;
  }
 
  /* check args now */
  if (count != 1) return(NULL);
 
  return(argv[0]);
}
 
 
int main(void) {
  int fd;
  const char *fname;
  char buff[1024];
  struct linedb db;
  unsigned char screenw = 0, screenh = 0;
  unsigned char cursorposx = 0, cursorposy = 0;
  unsigned char uidirtyfrom = 0, uidirtyto = 0xff; /* make sure to redraw entire UI at first run */
 
  bzero(&db, sizeof(db));
 
  svarlang_autoload_nlspath("sved");
 
  fname = parseargv();
 
  if (fname == NULL) {
    mdr_coutraw_puts("usage: sved file.txt");
    return(0);
  }
 
 
 
  mdr_coutraw_puts("");
 
  if (_dos_open(fname, O_RDONLY, &fd) != 0) {
    mdr_coutraw_puts("Failed to open file:");
    mdr_coutraw_puts(fname);
    return(1);
  }
 
  /* load file */
  {
    unsigned int prevlen = 0, len, llen;
 
    do {
      if (_dos_read(fd, buff + prevlen, sizeof(buff) - prevlen, &len) != 0) break;
      len += prevlen;
 
      /* look for nearest \n and replace with 0*/
      for (llen = 0; buff[llen] != '\n'; llen++) {
        if (llen == sizeof(buff)) break;
      }
      buff[llen] = 0;
      if ((llen > 0) && (buff[llen - 1])) buff[llen - 1] = 0; /* trim \r if line ending is cr/lf */
      line_add(&db, buff);
 
      len -= llen + 1;
      memmove(buff, buff + llen + 1, len);
      prevlen = len;
    } while (len > 0);
 
  }
 
  /* add an empty line at end if not present already */
  if (db.cursor->len != 0) line_add(&db, "");
 
  _dos_close(fd);
 
  if (mdr_cout_init(&screenw, &screenh)) load_colorscheme();
  ui_basic(screenw, screenh, fname);
 
  db_rewind(&db);
 
  for (;;) {
    int k;
 
    check_cursor_not_after_eol(&db, &cursorposx, &uidirtyfrom, &uidirtyto);
    mdr_cout_locate(cursorposy, cursorposx);
 
    if (uidirtyfrom != 0xff) {
      ui_refresh(&db, screenw, screenh, uidirtyfrom, uidirtyto);
      uidirtyfrom = 0xff;
    }
 
    k = keyb_getkey();
 
    if (k == 0x150) { /* down */
      cursor_down(&db, &cursorposy, screenh, &uidirtyfrom, &uidirtyto);
 
    } else if (k == 0x148) { /* up */
      cursor_up(&db, &cursorposy, &uidirtyfrom, &uidirtyto);
 
    } else if (k == 0x14D) { /* right */
      if (db.cursor->len > db.xoffset + cursorposx) {
        if (cursorposx < screenw - 2) {
          cursorposx++;
        } else {
          db.xoffset++;
          uidirtyfrom = 0;
          uidirtyto = 0xff;
        }
      } else {
        cursor_down(&db, &cursorposy, screenh, &uidirtyfrom, &uidirtyto);
        cursor_home(&db, &cursorposx, &uidirtyfrom, &uidirtyto);
      }
 
    } else if (k == 0x14B) { /* left */
      if (cursorposx > 0) {
        cursorposx--;
      } else if (db.xoffset > 0) {
        db.xoffset--;
        uidirtyfrom = 0;
        uidirtyto = 0xff;
      } else if (db.cursor->prev != NULL) { /* jump to end of line above */
        cursor_up(&db, &cursorposy, &uidirtyfrom, &uidirtyto);
        cursor_eol(&db, &cursorposx, screenw, &uidirtyfrom, &uidirtyto);
      }
 
    } else if (k == 0x149) { /* pgup */
      // TODO
 
    } else if (k == 0x151) { /* pgdown */
      // TODO
 
    } else if (k == 0x147) { /* home */
       cursor_home(&db, &cursorposx, &uidirtyfrom, &uidirtyto);
 
    } else if (k == 0x14F) { /* end */
       cursor_eol(&db, &cursorposx, screenw, &uidirtyfrom, &uidirtyto);
 
    } else if (k == 0x1B) { /* ESC */
      break;
 
    } else { /* UNHANDLED KEY - TODO IGNORE THIS IN PRODUCTION RELEASE */
      char buff[4];
      const char *HEX = "0123456789ABCDEF";
      buff[0] = HEX[(k >> 8) & 15];
      buff[1] = HEX[(k >> 4) & 15];
      buff[2] = HEX[k & 15];
      mdr_cout_str(screenh - 1, 0, "UNHANDLED KEY: 0x", scheme[COL_STATUSBAR1], 17);
      mdr_cout_str(screenh - 1, 17, buff, scheme[COL_STATUSBAR1], 3);
      keyb_getkey();
      break;
    }
  }
 
  mdr_cout_close();
 
  /* TODO free memory */
 
  return(0);
}
 

Rev 1284	Rev 1286
1	`/* Sved, the SvarDOS editor`	1	`/* Sved, the SvarDOS editor`
2	`*`	2	`*`
3	`* Copyright (C) 2023 Mateusz Viste`	3	`* Copyright (C) 2023 Mateusz Viste`
4	`*`	4	`*`
5	`* Sved is released under the terms of the MIT license.`	5	`* Sved is released under the terms of the MIT license.`
6	`*`	6	`*`
7	`* Permission is hereby granted, free of charge, to any person obtaining a copy`	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`	8	`* of this software and associated documentation files (the "Software"), to`
9	`* deal in the Software without restriction, including without limitation the`	9	`* deal in the Software without restriction, including without limitation the`
10	`* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or`	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`	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:`	12	`* furnished to do so, subject to the following conditions:`
13	`*`	13	`*`
14	`* The above copyright notice and this permission notice shall be included in`	14	`* The above copyright notice and this permission notice shall be included in`
15	`* all copies or substantial portions of the Software.`	15	`* all copies or substantial portions of the Software.`
16	`*`	16	`*`
17	`* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR`	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,`	18	`* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,`
19	`* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE`	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`	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`	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`	22	`* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS`
23	`* IN THE SOFTWARE.`	23	`* IN THE SOFTWARE.`
24	`*/`	24	`*/`
25		25
26	`#include <dos.h>`	26	`#include <dos.h>`
27	`#include <fcntl.h>`	27	`#include <fcntl.h>`
28	`#include <stdlib.h>`	28	`#include <stdlib.h>`
29	`#include <string.h>`	29	`#include <string.h>`
30		30
31	`#include "mdr\cout.h"`	31	`#include "mdr\cout.h"`
32	`#include "mdr\keyb.h"`	32	`#include "mdr\keyb.h"`
33		33
34	`#include "svarlang\svarlang.h"`	34	`#include "svarlang\svarlang.h"`
35		35
36	`#define COL_TXT 0`	36	`#define COL_TXT 0`
37	`#define COL_STATUSBAR1 1`	37	`#define COL_STATUSBAR1 1`
38	`#define COL_STATUSBAR2 2`	38	`#define COL_STATUSBAR2 2`
39	`#define COL_SCROLLBAR 3`	39	`#define COL_SCROLLBAR 3`
40	`/* preload the mono scheme (to be overloaded at runtime if color adapter present) */`	40	`/* preload the mono scheme (to be overloaded at runtime if color adapter present) */`
41	`static unsigned char scheme[] = {0x07, 0x70, 0x70, 0x70};`	41	`static unsigned char scheme[] = {0x07, 0x70, 0x70, 0x70};`
42		42
43	`#define SCROLL_CURSOR 0xB1`	43	`#define SCROLL_CURSOR 0xB1`
44		44
45		45
46	`struct line {`	46	`struct line {`
47	`struct line *prev;`	47	`struct line *prev;`
48	`struct line *next;`	48	`struct line *next;`
49	`unsigned short len;`	49	`unsigned short len;`
50	`char payload[1];`	50	`char payload[1];`
51	`};`	51	`};`
52		52
53	`struct linedb {`	53	`struct linedb {`
54	`struct line *topscreen;`	54	`struct line *topscreen;`
55	`struct line *cursor;`	55	`struct line *cursor;`
56	`unsigned short xoffset;`	56	`unsigned short xoffset;`
57	`};`	57	`};`
58		58
59		59
60		60
61	`void line_add(struct linedb db, const char line) {`	61	`void line_add(struct linedb db, const char line) {`
62	`unsigned short slen = strlen(line);`	62	`unsigned short slen = strlen(line);`
63	`struct line *l;`	63	`struct line *l;`
64		64
65	`/* trim out CR/LF line endings */`	65	`/* trim out CR/LF line endings */`
66	`if ((slen >= 2) && (line[slen - 2] == '\r')) {`	66	`if ((slen >= 2) && (line[slen - 2] == '\r')) {`
67	`slen -= 2;`	67	`slen -= 2;`
68	`} else if ((slen >= 1) && (line[slen - 1] == '\n')) {`	68	`} else if ((slen >= 1) && (line[slen - 1] == '\n')) {`
69	`slen--;`	69	`slen--;`
70	`}`	70	`}`
71		71
72	`l = calloc(1, sizeof(struct line) + slen + 1);`	72	`l = calloc(1, sizeof(struct line) + slen + 1);`
73	`l->prev = db->cursor;`	73	`l->prev = db->cursor;`
74	`if (db->cursor) {`	74	`if (db->cursor) {`
75	`l->next = db->cursor->next;`	75	`l->next = db->cursor->next;`
76	`db->cursor->next = l;`	76	`db->cursor->next = l;`
77	`l->next->prev = l;`	77	`l->next->prev = l;`
78	`}`	78	`}`
79	`db->cursor = l;`	79	`db->cursor = l;`
80	`memmove(l->payload, line, slen);`	80	`memmove(l->payload, line, slen);`
81	`l->len = slen;`	81	`l->len = slen;`
82	`}`	82	`}`
83		83
84		84
85	`void db_rewind(struct linedb *db) {`	85	`void db_rewind(struct linedb *db) {`
86	`if (db->cursor == NULL) return;`	86	`if (db->cursor == NULL) return;`
87	`while (db->cursor->prev) db->cursor = db->cursor->prev;`	87	`while (db->cursor->prev) db->cursor = db->cursor->prev;`
88	`db->topscreen = db->cursor;`	88	`db->topscreen = db->cursor;`
89	`}`	89	`}`
90		90
91		91
92	`void load_colorscheme(void) {`	92	`void load_colorscheme(void) {`
93	`scheme[COL_TXT] = 0x17;`	93	`scheme[COL_TXT] = 0x17;`
94	`scheme[COL_STATUSBAR1] = 0x70;`	94	`scheme[COL_STATUSBAR1] = 0x70;`
95	`scheme[COL_STATUSBAR2] = 0x78;`	95	`scheme[COL_STATUSBAR2] = 0x78;`
96	`scheme[COL_SCROLLBAR] = 0x70;`	96	`scheme[COL_SCROLLBAR] = 0x70;`
97	`}`	97	`}`
98		98
99		99
100	`static void ui_basic(unsigned char screenw, unsigned char screenh, const char *fname) {`	100	`static void ui_basic(unsigned char screenw, unsigned char screenh, const char *fname) {`
101	`unsigned char i;`	101	`unsigned char i;`
102	`const char *s = "HELP";`	102	`const char *s = "HELP";`
103	`unsigned char helpcol = screenw - (strlen(s) + 4);`	103	`unsigned char helpcol = screenw - (strlen(s) + 4);`
104		104
105	`/* clear screen */`	105	`/* clear screen */`
106	`mdr_cout_cls(scheme[COL_TXT]);`	106	`mdr_cout_cls(scheme[COL_TXT]);`
107		107
108	`/* status bar */`	108	`/* status bar */`
109	`for (i = 0; i < helpcol; i++) {`	109	`for (i = 0; i < helpcol; i++) {`
110	`mdr_cout_char(screenh - 1, i, *fname, scheme[COL_STATUSBAR1]);`	110	`mdr_cout_char(screenh - 1, i, *fname, scheme[COL_STATUSBAR1]);`
111	`if (*fname != 0) fname++;`	111	`if (*fname != 0) fname++;`
112	`}`	112	`}`
113	`mdr_cout_str(screenh - 1, helpcol, " F1=", scheme[COL_STATUSBAR2], 40);`	113	`mdr_cout_str(screenh - 1, helpcol, " F1=", scheme[COL_STATUSBAR2], 40);`
114	`mdr_cout_str(screenh - 1, helpcol + 4, s, scheme[COL_STATUSBAR2], 40);`	114	`mdr_cout_str(screenh - 1, helpcol + 4, s, scheme[COL_STATUSBAR2], 40);`
115		115
116	`/* scroll bar */`	116	`/* scroll bar */`
117	`for (i = 0; i < (screenh - 1); i++) {`	117	`for (i = 0; i < (screenh - 1); i++) {`
118	`mdr_cout_char(i, screenw - 1, SCROLL_CURSOR, scheme[COL_SCROLLBAR]);`	118	`mdr_cout_char(i, screenw - 1, SCROLL_CURSOR, scheme[COL_SCROLLBAR]);`
119	`}`	119	`}`
120	`}`	120	`}`
121		121
122		122
123	`static void ui_refresh(const struct linedb *db, unsigned char screenw, unsigned char screenh, unsigned char uidirtyfrom, unsigned char uidirtyto) {`	123	`static void ui_refresh(const struct linedb *db, unsigned char screenw, unsigned char screenh, unsigned char uidirtyfrom, unsigned char uidirtyto) {`
124	`unsigned char y = 0;`	124	`unsigned char y = 0;`
125	`unsigned char len;`	125	`unsigned char len;`
126	`struct line *l;`	126	`struct line *l;`
127		127
128	`/* DEBUG TODO FIXME */`	128	`/* DEBUG TODO FIXME */`
129	`static char m = 'a';`	129	`static char m = 'a';`
130	`m++;`	130	`m++;`
131	`if (m > 'z') m = 'a';`	131	`if (m > 'z') m = 'a';`
132		132
133	`for (l = db->topscreen; l != NULL; l = l->next) {`	133	`for (l = db->topscreen; l != NULL; l = l->next) {`
134		134
135	`/* skip lines that do not to be refreshed */`	135	`/* skip lines that do not to be refreshed */`
136	`if ((y < uidirtyfrom) \|\| (y > uidirtyto)) continue;`	136	`if ((y < uidirtyfrom) \|\| (y > uidirtyto)) continue;`
137		137
138	`if (db->xoffset < l->len) {`	138	`if (db->xoffset < l->len) {`
139	`len = mdr_cout_str(y, 0, l->payload + db->xoffset, scheme[COL_TXT], screenw - 1);`	139	`len = mdr_cout_str(y, 0, l->payload + db->xoffset, scheme[COL_TXT], screenw - 1);`
140	`} else {`	140	`} else {`
141	`len = 0;`	141	`len = 0;`
142	`}`	142	`}`
143	`while (len < screenw - 1) mdr_cout_char(y, len++, ' ', scheme[COL_TXT]);`	143	`while (len < screenw - 1) mdr_cout_char(y, len++, ' ', scheme[COL_TXT]);`
144		144
145	`/* FIXME DEBUG */`	145	`/* FIXME DEBUG */`
146	`mdr_cout_char(y, 0, m, scheme[COL_STATUSBAR1]);`	146	`mdr_cout_char(y, 0, m, scheme[COL_STATUSBAR1]);`
147		147
148	`if (y == screenh - 2) break;`	148	`if (y == screenh - 2) break;`
149	`y++;`	149	`y++;`
150	`}`	150	`}`
151	`}`	151	`}`
152		152
153		153
154	`static void check_cursor_not_after_eol(struct linedb db, unsigned char cursorpos, unsigned char uidirtyfrom, unsigned char uidirtyto) {`	154	`static void check_cursor_not_after_eol(struct linedb db, unsigned char cursorpos, unsigned char uidirtyfrom, unsigned char uidirtyto) {`
155	`if (db->xoffset + *cursorpos <= db->cursor->len) return;`	155	`if (db->xoffset + *cursorpos <= db->cursor->len) return;`
156		156
157	`if (db->cursor->len < db->xoffset) {`	157	`if (db->cursor->len < db->xoffset) {`
158	`*cursorpos = 0;`	158	`*cursorpos = 0;`
159	`db->xoffset = db->cursor->len;`	159	`db->xoffset = db->cursor->len;`
160	`*uidirtyfrom = 0;`	160	`*uidirtyfrom = 0;`
161	`*uidirtyto = 0xff;`	161	`*uidirtyto = 0xff;`
162	`} else {`	162	`} else {`
163	`*cursorpos = db->cursor->len - db->xoffset;`	163	`*cursorpos = db->cursor->len - db->xoffset;`
164	`}`	164	`}`
165	`}`	165	`}`
166		166
167		167
168	`static void cursor_up(struct linedb db, unsigned char cursorposy, unsigned char uidirtyfrom, unsigned char uidirtyto) {`	168	`static void cursor_up(struct linedb db, unsigned char cursorposy, unsigned char uidirtyfrom, unsigned char uidirtyto) {`
169	`if (db->cursor->prev != NULL) {`	169	`if (db->cursor->prev != NULL) {`
170	`db->cursor = db->cursor->prev;`	170	`db->cursor = db->cursor->prev;`
171	`if (*cursorposy == 0) {`	171	`if (*cursorposy == 0) {`
172	`db->topscreen = db->cursor;`	172	`db->topscreen = db->cursor;`
173	`*uidirtyfrom = 0;`	173	`*uidirtyfrom = 0;`
174	`*uidirtyto = 0xff;`	174	`*uidirtyto = 0xff;`
175	`} else {`	175	`} else {`
176	`*cursorposy -= 1;`	176	`*cursorposy -= 1;`
177	`}`	177	`}`
178	`}`	178	`}`
179	`}`	179	`}`
180		180
181		181
182	`static void cursor_eol(struct linedb db, unsigned char cursorposx, unsigned char screenw, unsigned char uidirtyfrom, unsigned char uidirtyto) {`	182	`static void cursor_eol(struct linedb db, unsigned char cursorposx, unsigned char screenw, unsigned char uidirtyfrom, unsigned char uidirtyto) {`
183	`/* adjust xoffset to make sure eol is visible on screen */`	183	`/* adjust xoffset to make sure eol is visible on screen */`
184	`if (db->xoffset > db->cursor->len) {`	184	`if (db->xoffset > db->cursor->len) {`
185	`db->xoffset = db->cursor->len - 1;`	185	`db->xoffset = db->cursor->len - 1;`
186	`*uidirtyfrom = 0;`	186	`*uidirtyfrom = 0;`
187	`*uidirtyto = 0xff;`	187	`*uidirtyto = 0xff;`
188	`}`	188	`}`
189		189
190	`if (db->xoffset + screenw - 1 <= db->cursor->len) {`	190	`if (db->xoffset + screenw - 1 <= db->cursor->len) {`
191	`db->xoffset = db->cursor->len - screenw + 2;`	191	`db->xoffset = db->cursor->len - screenw + 2;`
192	`*uidirtyfrom = 0;`	192	`*uidirtyfrom = 0;`
193	`*uidirtyto = 0xff;`	193	`*uidirtyto = 0xff;`
194	`}`	194	`}`
195	`*cursorposx = db->cursor->len - db->xoffset;`	195	`*cursorposx = db->cursor->len - db->xoffset;`
196	`}`	196	`}`
197		197
198		198
199	`static void cursor_down(struct linedb db, unsigned char cursorposy, unsigned char screenh, unsigned char uidirtyfrom, unsigned char uidirtyto) {`	199	`static void cursor_down(struct linedb db, unsigned char cursorposy, unsigned char screenh, unsigned char uidirtyfrom, unsigned char uidirtyto) {`
200	`if (db->cursor->next != NULL) {`	200	`if (db->cursor->next != NULL) {`
201	`db->cursor = db->cursor->next;`	201	`db->cursor = db->cursor->next;`
202	`if (*cursorposy < screenh - 2) {`	202	`if (*cursorposy < screenh - 2) {`
203	`*cursorposy += 1;`	203	`*cursorposy += 1;`
204	`} else {`	204	`} else {`
205	`db->topscreen = db->topscreen->next;`	205	`db->topscreen = db->topscreen->next;`
206	`*uidirtyfrom = 0;`	206	`*uidirtyfrom = 0;`
207	`*uidirtyto = 0xff;`	207	`*uidirtyto = 0xff;`
208	`}`	208	`}`
209	`}`	209	`}`
210	`}`	210	`}`
211		211
212		212
213	`static void cursor_home(struct linedb db, unsigned char cursorposx, unsigned char uidirtyfrom, unsigned char uidirtyto) {`	213	`static void cursor_home(struct linedb db, unsigned char cursorposx, unsigned char uidirtyfrom, unsigned char uidirtyto) {`
214	`*cursorposx = 0;`	214	`*cursorposx = 0;`
215	`if (db->xoffset != 0) {`	215	`if (db->xoffset != 0) {`
216	`db->xoffset = 0;`	216	`db->xoffset = 0;`
217	`*uidirtyfrom = 0;`	217	`*uidirtyfrom = 0;`
218	`*uidirtyto = 0xff;`	218	`*uidirtyto = 0xff;`
219	`}`	219	`}`
220	`}`	220	`}`
221		221
222		222
-		223	`/* a custom argv-parsing routine that looks directly inside the PSP, avoids the need`
-		224	`* of argc and argv, saves some 330 bytes of binary size */`
223	`int main(int argc, char **argv) {`	225	`static char *parseargv(void) {`
-		226	`char tail = (void )0x81; /* THIS WORKS ONLY IN SMALL MEMORY MODEL */`
-		227	`unsigned char count = 0;`
-		228	`char *argv[4];`
-		229
-		230	`mdr_coutraw_puts(tail);`
-		231
-		232	`while (count < 4) {`
-		233	`/* jump to nearest arg */`
-		234	`while (*tail == ' ') {`
-		235	`*tail = 0;`
-		236	`tail++;`
-		237	`}`
-		238
-		239	`if (*tail == '\r') {`
-		240	`*tail = 0;`
-		241	`break;`
-		242	`}`
-		243
-		244	`argv[count++] = tail;`
-		245
-		246	`/* jump to next delimiter */`
-		247	`while ((tail != ' ') && (tail != '\r')) tail++;`
-		248	`}`
-		249
-		250	`/* check args now */`
-		251	`if (count != 1) return(NULL);`
-		252
-		253	`return(argv[0]);`
-		254	`}`
-		255
-		256
-		257	`int main(void) {`
224	`int fd;`	258	`int fd;`
225	`const char *fname = NULL;`	259	`const char *fname;`
226	`char buff[1024];`	260	`char buff[1024];`
227	`struct linedb db;`	261	`struct linedb db;`
228	`unsigned char screenw = 0, screenh = 0;`	262	`unsigned char screenw = 0, screenh = 0;`
229	`unsigned char cursorposx = 0, cursorposy = 0;`	263	`unsigned char cursorposx = 0, cursorposy = 0;`
230	`unsigned char uidirtyfrom = 0, uidirtyto = 0xff; /* make sure to redraw entire UI at first run */`	264	`unsigned char uidirtyfrom = 0, uidirtyto = 0xff; /* make sure to redraw entire UI at first run */`
231		265
232	`bzero(&db, sizeof(db));`	266	`bzero(&db, sizeof(db));`
233		267
234	`svarlang_autoload_nlspath("sved");`	268	`svarlang_autoload_nlspath("sved");`
235		269
-		270	`fname = parseargv();`
-		271
236	`if ((argc != 2) \|\| (argv[1][0] == '/')) {`	272	`if (fname == NULL) {`
237	`mdr_coutraw_puts("usage: sved file.txt");`	273	`mdr_coutraw_puts("usage: sved file.txt");`
238	`return(0);`	274	`return(0);`
239	`}`	275	`}`
240		276
241	`fname = argv[1];`	-
242		-
243	`mdr_coutraw_puts("");`	277	`mdr_coutraw_puts("");`
244		278
245	`if (_dos_open(fname, O_RDONLY, &fd) != 0) {`	279	`if (_dos_open(fname, O_RDONLY, &fd) != 0) {`
246	`mdr_coutraw_puts("Failed to open file:");`	280	`mdr_coutraw_puts("Failed to open file:");`
247	`mdr_coutraw_puts(fname);`	281	`mdr_coutraw_puts(fname);`
248	`return(1);`	282	`return(1);`
249	`}`	283	`}`
250		284
251	`/* load file */`	285	`/* load file */`
252	`{`	286	`{`
253	`unsigned int prevlen = 0, len, llen;`	287	`unsigned int prevlen = 0, len, llen;`
254		288
255	`do {`	289	`do {`
256	`if (_dos_read(fd, buff + prevlen, sizeof(buff) - prevlen, &len) != 0) break;`	290	`if (_dos_read(fd, buff + prevlen, sizeof(buff) - prevlen, &len) != 0) break;`
257	`len += prevlen;`	291	`len += prevlen;`
258		292
259	`/* look for nearest \n and replace with 0*/`	293	`/* look for nearest \n and replace with 0*/`
260	`for (llen = 0; buff[llen] != '\n'; llen++) {`	294	`for (llen = 0; buff[llen] != '\n'; llen++) {`
261	`if (llen == sizeof(buff)) break;`	295	`if (llen == sizeof(buff)) break;`
262	`}`	296	`}`
263	`buff[llen] = 0;`	297	`buff[llen] = 0;`
264	`if ((llen > 0) && (buff[llen - 1])) buff[llen - 1] = 0; /* trim \r if line ending is cr/lf */`	298	`if ((llen > 0) && (buff[llen - 1])) buff[llen - 1] = 0; /* trim \r if line ending is cr/lf */`
265	`line_add(&db, buff);`	299	`line_add(&db, buff);`
266		300
267	`len -= llen + 1;`	301	`len -= llen + 1;`
268	`memmove(buff, buff + llen + 1, len);`	302	`memmove(buff, buff + llen + 1, len);`
269	`prevlen = len;`	303	`prevlen = len;`
270	`} while (len > 0);`	304	`} while (len > 0);`
271		305
272	`}`	306	`}`
273		307
274	`/* add an empty line at end if not present already */`	308	`/* add an empty line at end if not present already */`
275	`if (db.cursor->len != 0) line_add(&db, "");`	309	`if (db.cursor->len != 0) line_add(&db, "");`
276		310
277	`_dos_close(fd);`	311	`_dos_close(fd);`
278		312
279	`if (mdr_cout_init(&screenw, &screenh)) load_colorscheme();`	313	`if (mdr_cout_init(&screenw, &screenh)) load_colorscheme();`
280	`ui_basic(screenw, screenh, fname);`	314	`ui_basic(screenw, screenh, fname);`
281		315
282	`db_rewind(&db);`	316	`db_rewind(&db);`
283		317
284	`for (;;) {`	318	`for (;;) {`
285	`int k;`	319	`int k;`
286		320
287	`check_cursor_not_after_eol(&db, &cursorposx, &uidirtyfrom, &uidirtyto);`	321	`check_cursor_not_after_eol(&db, &cursorposx, &uidirtyfrom, &uidirtyto);`
288	`mdr_cout_locate(cursorposy, cursorposx);`	322	`mdr_cout_locate(cursorposy, cursorposx);`
289		323
290	`if (uidirtyfrom != 0xff) {`	324	`if (uidirtyfrom != 0xff) {`
291	`ui_refresh(&db, screenw, screenh, uidirtyfrom, uidirtyto);`	325	`ui_refresh(&db, screenw, screenh, uidirtyfrom, uidirtyto);`
292	`uidirtyfrom = 0xff;`	326	`uidirtyfrom = 0xff;`
293	`}`	327	`}`
294		328
295	`k = keyb_getkey();`	329	`k = keyb_getkey();`
296		330
297	`if (k == 0x150) { /* down */`	331	`if (k == 0x150) { /* down */`
298	`cursor_down(&db, &cursorposy, screenh, &uidirtyfrom, &uidirtyto);`	332	`cursor_down(&db, &cursorposy, screenh, &uidirtyfrom, &uidirtyto);`
299		333
300	`} else if (k == 0x148) { /* up */`	334	`} else if (k == 0x148) { /* up */`
301	`cursor_up(&db, &cursorposy, &uidirtyfrom, &uidirtyto);`	335	`cursor_up(&db, &cursorposy, &uidirtyfrom, &uidirtyto);`
302		336
303	`} else if (k == 0x14D) { /* right */`	337	`} else if (k == 0x14D) { /* right */`
304	`if (db.cursor->len > db.xoffset + cursorposx) {`	338	`if (db.cursor->len > db.xoffset + cursorposx) {`
305	`if (cursorposx < screenw - 2) {`	339	`if (cursorposx < screenw - 2) {`
306	`cursorposx++;`	340	`cursorposx++;`
307	`} else {`	341	`} else {`
308	`db.xoffset++;`	342	`db.xoffset++;`
309	`uidirtyfrom = 0;`	343	`uidirtyfrom = 0;`
310	`uidirtyto = 0xff;`	344	`uidirtyto = 0xff;`
311	`}`	345	`}`
312	`} else {`	346	`} else {`
313	`cursor_down(&db, &cursorposy, screenh, &uidirtyfrom, &uidirtyto);`	347	`cursor_down(&db, &cursorposy, screenh, &uidirtyfrom, &uidirtyto);`
314	`cursor_home(&db, &cursorposx, &uidirtyfrom, &uidirtyto);`	348	`cursor_home(&db, &cursorposx, &uidirtyfrom, &uidirtyto);`
315	`}`	349	`}`
316		350
317	`} else if (k == 0x14B) { /* left */`	351	`} else if (k == 0x14B) { /* left */`
318	`if (cursorposx > 0) {`	352	`if (cursorposx > 0) {`
319	`cursorposx--;`	353	`cursorposx--;`
320	`} else if (db.xoffset > 0) {`	354	`} else if (db.xoffset > 0) {`
321	`db.xoffset--;`	355	`db.xoffset--;`
322	`uidirtyfrom = 0;`	356	`uidirtyfrom = 0;`
323	`uidirtyto = 0xff;`	357	`uidirtyto = 0xff;`
324	`} else if (db.cursor->prev != NULL) { /* jump to end of line above */`	358	`} else if (db.cursor->prev != NULL) { /* jump to end of line above */`
325	`cursor_up(&db, &cursorposy, &uidirtyfrom, &uidirtyto);`	359	`cursor_up(&db, &cursorposy, &uidirtyfrom, &uidirtyto);`
326	`cursor_eol(&db, &cursorposx, screenw, &uidirtyfrom, &uidirtyto);`	360	`cursor_eol(&db, &cursorposx, screenw, &uidirtyfrom, &uidirtyto);`
327	`}`	361	`}`
328		362
329	`} else if (k == 0x149) { /* pgup */`	363	`} else if (k == 0x149) { /* pgup */`
330	`// TODO`	364	`// TODO`
331		365
332	`} else if (k == 0x151) { /* pgdown */`	366	`} else if (k == 0x151) { /* pgdown */`
333	`// TODO`	367	`// TODO`
334		368
335	`} else if (k == 0x147) { /* home */`	369	`} else if (k == 0x147) { /* home */`
336	`cursor_home(&db, &cursorposx, &uidirtyfrom, &uidirtyto);`	370	`cursor_home(&db, &cursorposx, &uidirtyfrom, &uidirtyto);`
337		371
338	`} else if (k == 0x14F) { /* end */`	372	`} else if (k == 0x14F) { /* end */`
339	`cursor_eol(&db, &cursorposx, screenw, &uidirtyfrom, &uidirtyto);`	373	`cursor_eol(&db, &cursorposx, screenw, &uidirtyfrom, &uidirtyto);`
340		374
341	`} else if (k == 0x1B) { /* ESC */`	375	`} else if (k == 0x1B) { /* ESC */`
342	`break;`	376	`break;`
343		377
344	`} else { /* UNHANDLED KEY - TODO IGNORE THIS IN PRODUCTION RELEASE */`	378	`} else { /* UNHANDLED KEY - TODO IGNORE THIS IN PRODUCTION RELEASE */`
345	`char buff[4];`	379	`char buff[4];`
346	`const char *HEX = "0123456789ABCDEF";`	380	`const char *HEX = "0123456789ABCDEF";`
347	`buff[0] = HEX[(k >> 8) & 15];`	381	`buff[0] = HEX[(k >> 8) & 15];`
348	`buff[1] = HEX[(k >> 4) & 15];`	382	`buff[1] = HEX[(k >> 4) & 15];`
349	`buff[2] = HEX[k & 15];`	383	`buff[2] = HEX[k & 15];`
350	`mdr_cout_str(screenh - 1, 0, "UNHANDLED KEY: 0x", scheme[COL_STATUSBAR1], 17);`	384	`mdr_cout_str(screenh - 1, 0, "UNHANDLED KEY: 0x", scheme[COL_STATUSBAR1], 17);`
351	`mdr_cout_str(screenh - 1, 17, buff, scheme[COL_STATUSBAR1], 3);`	385	`mdr_cout_str(screenh - 1, 17, buff, scheme[COL_STATUSBAR1], 3);`
352	`keyb_getkey();`	386	`keyb_getkey();`
353	`break;`	387	`break;`
354	`}`	388	`}`
355	`}`	389	`}`
356		390
357	`mdr_cout_close();`	391	`mdr_cout_close();`
358		392
359	`/* TODO free memory */`	393	`/* TODO free memory */`
360		394
361	`return(0);`	395	`return(0);`
362	`}`	396	`}`
363		397

Subversion Repositories SvarDOS

(root)/sved/trunk/sved.c – Rev 1284 → 1286