File: main.c

package info (click to toggle)
jupp 3.1.38-1
  • links: PTS, VCS
  • area: main
  • in suites: buster, sid
  • size: 2,420 kB
  • sloc: ansic: 31,382; sh: 4,199; makefile: 431
file content (455 lines) | stat: -rw-r--r-- 10,220 bytes parent folder | download | duplicates (2)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
#define JUPP_IS_COPYRIGHT_C_BY "2018 mirabilos"

/*-
 * Copyright (c) 2004ff. Thorsten Glaser
 * Copyright (C) 1992 Joseph H. Allen
 *
 * This file is part of "jupp", a variant of Joe's Own Editor "JOE".
 *
 * jupp is free software; you can redistribute and/or modify it, deal
 * in the work, etc. under the terms of the GNU General Public Licen-
 * se, version 1 (of February 1989) as published by the Free Software
 * Foundation, reproduced in the file COPYING in the jupp source code
 * distribution. If jupp is combined with other independent work, for
 * example libraries or when using crunchgen, into a combined binary,
 * that may be conveyed under any version of the GPL, as published by
 * the Free Software Foundation, and any compatible licence permitted
 * by any version of the GPL, as above.
 *
 * This work is provided "AS IS" and WITHOUT WARRANTY of any kind, to
 * the utmost extent permitted by applicable law, neither express nor
 * implied; without malicious intent or gross negligence. In no event
 * may a licensor, author or contributor be held liable for indirect,
 * direct, other damage, loss, or other issues arising in any way out
 * of dealing in the work, even if advised of the possibility of such
 * damage or existence of a defect, except proven that it results out
 * of said person's immediate fault when using the work as intended.
 *-
 * Editor startup and main edit loop
 */

#define EXTERN
#include "config.h"
#include "types.h"

__RCSID("$MirOS: contrib/code/jupp/main.c,v 1.45 2018/11/11 18:51:26 tg Exp $");

#include <fcntl.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>

#include "b.h"
#include "help.h"
#include "kbd.h"
#include "macro.h"
#include "main.h"
#include "path.h"
#include "rc.h"
#include "scrn.h"
#include "termcap.h"
#include "tw.h"
#include "vfile.h"
#include "vs.h"
#include "w.h"
#include "charmap.h"
#include "syntax.h"
#include "utils.h"

extern int mid, dspasis, pgamnt, nobackups, lightoff, exask, lines, columns, dopadding, marking, dobeep;

extern int idleout;		/* Clear to use /dev/tty for screen */
extern unsigned char *joeterm;
int help = 0;			/* Set to have help on when starting */
int nonotice = 0;		/* Set to prevent copyright notice */
int orphan = 0;
unsigned char *exmsg = NULL;		/* Message to display when exiting the editor */

SCREEN *maint;			/* Main edit screen */

const char null[] = "";

#ifdef __CYGWIN__
extern unsigned char *cygwin32_cmdline(void);
#endif

#define is_ofsopt(ap) (0[ap] == '+' && 1[ap] >= '0' && 1[ap] <= '9')

/* Make windows follow cursor */

void dofollows(void)
{
	W *w = maint->curwin;

	do {
		if (w->y != -1 && w->watom->follow && w->object.base)
			w->watom->follow(w->object);
		w = (W *) (w->link.next);
	} while (w != maint->curwin);
}

/* Update screen */

int dostaupd = 1;
extern int staupd;

void edupd(int flg)
{
	W *w;
	int wid, hei;

	if (dostaupd) {
		staupd = 1;
		dostaupd = 0;
	}
	ttgtsz(&wid, &hei);
	if ((wid >= 2 && wid != maint->w) || (hei >= 1 && hei != maint->h)) {
		nresize(maint->t, wid, hei);
		sresize(maint);
	}
	dofollows();
	ttflsh();
	nscroll(maint->t);
	help_display(maint);
	w = maint->curwin;
	do {
		if (w->y != -1) {
			if (w->object.base && w->watom->disp)
				w->watom->disp(w->object, flg);
			msgout(w);
		}
		w = (W *) (w->link.next);
	} while (w != maint->curwin);
	cpos(maint->t, maint->curwin->x + maint->curwin->curx, maint->curwin->y + maint->curwin->cury);
	staupd = 0;
}

static int ahead = 0;
static int ungot = 0;
static int ungotc = 0;

void nungetc(int c)
{
	if (c != 'C' - '@' && c != 'M' - '@') {
		chmac();
		ungot = 1;
		ungotc = c;
	}
}

int edloop(int flg)
{
	int term = 0;
	int ret = 0;

	if (flg) {
		if (maint->curwin->watom->what == TYPETW)
			return 0;
		else
			maint->curwin->notify = &term;
	}
	while (!leave && (!flg || !term)) {
		MACRO *m;
		int c;

		if (exmsg && !flg) {
			vsrm(exmsg);
			exmsg = NULL;
		}
		edupd(1);
		if (!ahead && !have)
			ahead = 1;
		if (ungot) {
			c = ungotc;
			ungot = 0;
		} else
			c = ttgetc();

		if (!ahead && c == 10)
			c = 13;
		m = dokey(maint->curwin->kbd, c);
		if (maint->curwin->main && maint->curwin->main != maint->curwin) {
			int x = maint->curwin->kbd->x;

			maint->curwin->main->kbd->x = x;
			if (x)
				maint->curwin->main->kbd->seq[x - 1] = maint->curwin->kbd->seq[x - 1];
		}
		if (m)
			ret = exemac(m);
	}

	if (term == -1)
		return -1;
	else
		return ret;
}

unsigned char **mainenv;

static int
main_init(int argc, char **argv, char **envp, SCRN **np)
{
	CAP *cap;
	unsigned char *s;
	unsigned char *run;
	SCRN *n;
	W *opened = NULL;
	int omid;
	int backopt;
	int c;

	jalloc_init();
	init_JOERC();
	joe_locale();

	mainenv = (unsigned char **)envp;
	run = namprt(argv[0]);

	if ((s = (unsigned char *)getenv("LINES")) != NULL)
		lines = ustol(s, NULL, USTOL_DEC | USTOL_EOS);
	if ((s = (unsigned char *)getenv("COLUMNS")) != NULL)
		columns = ustol(s, NULL, USTOL_DEC | USTOL_EOS);
	if ((s = (unsigned char *)getenv("BAUD")) != NULL)
		Baud = ustol(s, NULL, USTOL_DEC | USTOL_EOS);
	if (getenv("DOPADDING"))
		dopadding = 1;
	if (getenv("NOXON"))
		noxon = 1;
	if ((s = (unsigned char *)getenv("JOETERM")) != NULL)
		joeterm = s;

	if (!(cap = getcap(NULL, 9600, NULL, NULL))) {
		fprintf(stderr, "Couldn't load termcap/terminfo entry\n");
		return 1;
	}

	s = (unsigned char *)getenv("HOME");
	if (s) {
		s = vsncpy(NULL, 0, sz(s));
		s = vsncpy(sv(s), sc("/."));
		s = vsncpy(sv(s), sv(run));
		s = vsncpy(sv(s), sc("rc"));
		c = procrc(cap, s);
		if (c == 0)
			goto donerc;
		if (c == 1) {
			unsigned char buf[8];

			fprintf(stderr, "There were errors in '%s'.  Use it anyway?", s);
			fflush(stderr);
			if (fgets((char *)buf, 8, stdin) != NULL &&
			    (buf[0] | 0x20) == 'y')
				goto donerc;
		}
	}

	if (has_JOERC) {
		vsrm(s);
		s = vsncpy(NULL, 0, sz(get_JOERC));
		s = vsncpy(sv(s), sv(run));
		s = vsncpy(sv(s), sc("rc"));
		c = procrc(cap, s);
		if (c == 0)
			goto donerc;
		if (c == 1) {
			unsigned char buf[8];

			fprintf(stderr, "There were errors in '%s'.  Use it anyway?", s);
			fflush(stderr);
			if (fgets((char *)buf, 8, stdin) != NULL &&
			    (buf[0] | 0x20) == 'y')
				goto donerc;
		}
	}

	/* Try built-in joerc */
	vsrm(s);
	s = vsncpy(NULL, 0, sc("*"));
	s = vsncpy(sv(s), sv(run));
	s = vsncpy(sv(s), sc("rc"));
	c = procrc(cap, s);
	if (c == 0)
		goto donerc;
	if (c == 1) {
		unsigned char buf[8];

		fprintf(stderr, "There were errors in '%s'.  Use it anyway?", s);
		fflush(stderr);
		if (fgets((char *)buf, 8, stdin) != NULL &&
		    (buf[0] | 0x20) == 'y')
			goto donerc;
	}

	fprintf(stderr, "Couldn't open '%s'\n", s);
	return 1;

 donerc:
	help_init(s);
	for (c = 1; argv[c]; ++c) {
		if (argv[c][0] == '-') {
#ifdef __CYGWIN__
			if (!strcmp(argv[c], "-CYGhack")) {
				s = cygwin32_cmdline();
				s = strstr(s, "-CYGhack");
				if (s) {
					s += /* strlen("-CYGhack") */ 8;
					while (*s == ' ' || *s == '\t')
						++s;
					argv[c] = s;
					argv[c + 1] = NULL;
					break;
				}
			}
#endif
			if (argv[c][1])
				switch (glopt(argv[c] + 1, argv[c + 1], NULL, 1)) {
				case 0:
					fprintf(stderr, "Unknown option '%s'\n", argv[c]);
					break;
				case 1:
					break;
				case 2:
					++c;
					break;
			} else
				idleout = 0;
		}
	}

#if HAVE_ISATTY
	if (idleout && (!isatty(0) || !isatty(1)))
		idleout = 0;
#endif

	if (!(n = nopen(cap)))
		return 1;
	maint = screate(n);
	vmem = vtmp();

	for (c = 1, backopt = 0; argv[c]; ++c)
		if (is_ofsopt(argv[c])) {
			if (!backopt)
				backopt = c;
		} else if (argv[c][0] == '-' && argv[c][1]) {
			if (!backopt)
				backopt = c;
			if (glopt(argv[c] + 1, argv[c + 1], NULL, 0) == 2)
				++c;
		} else {
			B *b = bfind(argv[c]);
			BW *bw = NULL;
			int er = error;

			if (!orphan || !opened) {
				bw = wmktw(maint, b);
				if (!bw)
					goto wmktw_failed;
				if (er)
					msgnwt(bw->parent, msgs[-er]);
			} else
				b->orphan = 1;
			if (bw) {
				long lnum = 0;

				bw->o.readonly = bw->b->rdonly;
				if (backopt) {
					unsigned char *old_context;

					old_context = bw->o.context;
					while (backopt != c) {
						if (is_ofsopt(argv[backopt])) {
							lnum = ustol(argv[backopt] + 1, NULL, USTOL_TRIM | USTOL_EOS);
							++backopt;
						} else {
							if (glopt(argv[backopt] + 1, argv[backopt + 1], &bw->o, 0) == 2)
								backopt += 2;
							else
								backopt += 1;
							lazy_opts(&bw->o);
						}
					}
					if (old_context != bw->o.context) {
						/* update keymap */
						rmkbd(bw->parent->kbd);
						bw->parent->kbd =
						    mkkbd(kmap_getcontext(bw->o.context, 1));
					}
				}
				bw->b->o = bw->o;
				bw->b->rdonly = bw->o.readonly;
				if (!opened || opened == (void *)&opened)
					opened = bw->parent;
				maint->curwin = bw->parent;
				if (er == -1 && bw->o.mnew)
					exemac(bw->o.mnew);
				if (er == 0 && bw->o.mold)
					exemac(bw->o.mold);
				maint->curwin = opened;
				if (lnum > 0)
					pline(bw->cursor, lnum - 1);
			}
			if (!opened)
				opened = (void *)&opened;
			backopt = 0;
		}

	maint->curwin = opened == (void *)&opened ? NULL : opened;
	if (opened) {
		wshowall(maint);
		omid = mid;
		mid = 1;
		dofollows();
		mid = omid;
	} else {
		BW *bw = wmktw(maint, bfind(UC ""));

		if (!bw) {
 wmktw_failed:
			fprintf(stderr, "maint->h < 1, cannot happen\n");
			return (1);
		}
		if (bw->o.mnew)
			exemac(bw->o.mnew);
	}
	maint->curwin = maint->topwin;

	if (help) {
		help_on(maint);
	}
	if (!nonotice) {
		int uninvert = fdefault.hmsg &&
		    fdefault.hmsg[0] == '\\' &&
		    fdefault.hmsg[1] == 'i';

		joe_snprintf_5((char *)msgbuf, JOE_MSGBUFSIZE,
		    "\\i[ Joe's Own Editor v" VERSION
		    " | %s | %s " JUPP_IS_COPYRIGHT_C_BY " ]%s%s%s",
		    locale_map->name, locale_map->type ? "©" : "(c)",
		    uninvert ? "\\i " : fdefault.hmsg ? " " : "",
		    uninvert ? fdefault.hmsg + 2 : fdefault.hmsg ?
		    fdefault.hmsg : "", uninvert ? "" : "\\i");
		msgnw(lastw(maint)->object.base->parent, msgbuf);
	}

	*np = n;
	return 0;
}

int main_rv;

int
main(int argc, char **argv, char **envp)
{
	SCRN *n;

	if ((main_rv = main_init(argc, argv, envp, &n)))
		return (main_rv);

	edloop(0);
	vclose(vmem);
	nclose(n);
	if (exmsg)
		fprintf(stderr, "\n%s\n", exmsg);
	return (main_rv);
}