File: main.c

package info (click to toggle)
ucblogo 6.0+dfsg-2
  • links: PTS, VCS
  • area: main
  • in suites: buster, sid
  • size: 7,636 kB
  • sloc: ansic: 16,989; cpp: 3,818; makefile: 186; perl: 3
file content (369 lines) | stat: -rw-r--r-- 7,371 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
/*
 *      main.c          logo main procedure module              dvb
 *
 *	Copyright (C) 1993 by the Regents of the University of California
 *
 *      This program is free software; you can redistribute it and/or modify
 *      it under the terms of the GNU General Public License as published by
 *      the Free Software Foundation; either version 2 of the License, or
 *      (at your option) any later version.
 *  
 *      This program is distributed in the hope that it will be useful,
 *      but WITHOUT ANY WARRANTY; without even the implied warranty of
 *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *      GNU General Public License for more details.
 *  
 *      You should have received a copy of the GNU General Public License
 *      along with this program; if not, write to the Free Software
 *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

#ifdef WIN32
#include <windows.h>
#include <process.h>  /* needed? */
#endif

#include "logo.h"
#include "globals.h"

#ifdef HAVE_TERMIO_H
#ifdef HAVE_WX
#include <termios.h>
#else
#include <termio.h>
#endif
#else
#ifdef HAVE_SGTTY_H
#include <sgtty.h>
#endif
#endif

#ifdef __RZTC__
#include <signal.h>
#define SIGQUIT SIGTERM
#include <controlc.h>
#endif

#ifndef TIOCSTI
#include <setjmp.h>
jmp_buf iblk_buf;
#endif
 
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif

#ifdef mac
#include <console.h>
#endif

NODE *current_line = NIL;
NODE **bottom_stack; /*GC*/
NODE *command_line = NIL;   /* 6.0 command line args after files */

int stop_quietly_flag=0;

void unblock_input(void) {
    if (input_blocking) {
	input_blocking = 0;
#ifdef mac
	csetmode(C_ECHO, stdin);
	fflush(stdin);
#endif
#ifdef TIOCSTI
	ioctl(0,TIOCSTI,"\n");
#else
	longjmp(iblk_buf,1);
#endif
    }
}

extern int in_eval_save;

#ifdef SIG_TAKES_ARG
#define sig_arg 0
RETSIGTYPE logo_stop(int sig)
#else
#define sig_arg 
RETSIGTYPE logo_stop()
#endif
{
    if (inside_gc || in_eval_save) {
	int_during_gc = 1;
    } else {
	charmode_off();
	to_pending = 0;
        if (!stop_quietly_flag)
            err_logo(STOP_ERROR,NIL);
        stop_quietly_flag = 0;
#ifdef __RZTC__
	if (!input_blocking)
#endif
	  signal(SIGINT, logo_stop);
	unblock_input();
    }
    SIGRET
}

#ifdef SIG_TAKES_ARG
#define sig_arg 0
RETSIGTYPE logo_pause(int sig)
#else
#define sig_arg 
RETSIGTYPE logo_pause()
#endif
{
    if (inside_gc || in_eval_save) {
	int_during_gc = 2;
    } else {
	charmode_off();
	to_pending = 0;
#ifdef bsd
	sigsetmask(0);
#else
#if !defined(mac) && !defined(_MSC_VER)
	signal(SIGQUIT, logo_pause);
#endif
#endif
	lpause(NIL);
    }
    SIGRET
}

#ifdef SIG_TAKES_ARG
#define sig_arg 0
RETSIGTYPE mouse_down(int sig)
#else
#define sig_arg 
RETSIGTYPE mouse_down()
#endif
{
    NODE *line;

    if (inside_gc || in_eval_save) {
	if (int_during_gc == 0) int_during_gc = 3;
    } else {
	line = valnode__caseobj(Buttonact);
	if (line != UNBOUND && line != NIL) {
	    if (inside_evaluator) {
		eval_buttonact = line;
	    } else {
		eval_driver(line);
		fix_turtle_shownness();
	    }
	}
    }
    SIGRET
}

int keyact_set() {
    NODE *line;

    line = valnode__caseobj(Keyact);
    return (line != UNBOUND && line != NIL);
}

void do_keyact(int);

#ifdef SIG_TAKES_ARG
#define sig_arg 0
RETSIGTYPE delayed_keyact(int sig)
#else
#define sig_arg 
RETSIGTYPE delayed_keyact()
#endif
{
    do_keyact(readchar_lookahead_buf);
    SIGRET
}

void do_keyact(int ch) {
    NODE *line;

    readchar_lookahead_buf = ch;
    if (inside_gc || in_eval_save) {
	if (int_during_gc == 0) int_during_gc = 4;
    } else {
	line = valnode__caseobj(Keyact);
	if (line != UNBOUND && line != NIL) {
	    if (inside_evaluator) {
		eval_buttonact = line;
	    } else {
		eval_driver(line);
		fix_turtle_shownness();
	    }
	}
    }
}


RETSIGTYPE (*intfuns[])() = {0, logo_stop, logo_pause, mouse_down,
			     delayed_keyact};

void delayed_int() {
#ifdef SIG_TAKES_ARG
    (void)(*intfuns[int_during_gc])(0);
#else
    (void)(*intfuns[int_during_gc])();
#endif
}

#if defined(__RZTC__) && !defined(WIN32) /* sowings */
void _far _cdecl do_ctrl_c(void) {
    ctrl_c_count++;
}
#endif

#ifdef HAVE_WX
int wx_leave_mainloop = 0;
int  start (int argc,char ** argv) {
#else
int main(int argc, char *argv[]) {
#endif
    NODE *exec_list = NIL;
    NODE *cl_tail = NIL;
    int argc2;
    char **argv2;

#ifdef SYMANTEC_C
    extern void (*openproc)(void);
    extern void __open_std(void);
    openproc = &__open_std;
#endif

#ifdef mac
    init_mac_memory();
#endif

    bottom_stack = &exec_list; /*GC*/

#ifndef HAVE_WX
#ifdef x_window
    x_window_init(argc, argv);
#endif
#endif
    (void)addseg();
    term_init();
    init();

    math_init();

#ifdef ibm
    signal(SIGINT, SIG_IGN);
#if defined(__RZTC__) && !defined(WIN32) /* sowings */
    _controlc_handler = do_ctrl_c;
    controlc_open();
#endif
#else /* !ibm */
    signal(SIGINT, logo_stop);
#endif /* ibm */
#ifdef mac
    signal(SIGQUIT, SIG_IGN);
#else /* !mac */
	//signal(SIGQUIT, logo_pause);
#endif
    /* SIGQUITs never happen on the IBM */

    if (argc < 2) {
#ifndef WIN32
      if (1 || isatty(1))   // fix this.  for interactive from menu bar.
#endif
      {
	char version[20];
	lcleartext(NIL);
#ifdef HAVE_WX
	strcpy(version,"6.0");
#else
	strcpy(version,"5.6");
#endif
	ndprintf(stdout, message_texts[WELCOME_TO], version);
	new_line(stdout);
      }
    }

#ifdef HAVE_WX
    setvalnode__caseobj(LogoVersion, make_floatnode(6.0));
#else
    setvalnode__caseobj(LogoVersion, make_floatnode(5.6));
#endif
    setflag__caseobj(LogoVersion, VAL_BURIED);

    argv2 = argv; argc2 = argc;

    if (!strcmp(*argv+strlen(*argv)-4, "logo")) {
	argv++;
	while (--argc > 0 && strcmp(*argv, "-") && NOT_THROWING) {
	    argv++;
	}
    }

    argv++;
    while (--argc > 0) {
	if (command_line == NIL) 
	    cl_tail = command_line = cons(make_static_strnode(*argv++), NIL);
	else {
	    setcdr(cl_tail, cons(make_static_strnode(*argv++), NIL));
	    cl_tail = cdr(cl_tail);
	}
    }

    setvalnode__caseobj(CommandLine, command_line);

    silent_load(Startuplg, logolib);
    silent_load(Startup, NULL); /* load startup.lg */
    if (!strcmp(*argv2+strlen(*argv2)-4, "logo")) {
	argv2++;
	while (--argc2 > 0 && strcmp(*argv2, "-") && NOT_THROWING) {
	    silent_load(NIL,*argv2++);
	    }
    }

    for (;;) {
	if (NOT_THROWING) {
	    check_reserve_tank();
	    current_line = reader(stdin,"? ");
#ifdef __RZTC__
		(void)feof(stdin);
		if (!in_graphics_mode)
		    printf(" \b");
		fflush(stdout);
#endif

#ifndef WIN32
	    if (feof(stdin) && !isatty(0)) lbye(NIL);
#endif

#ifdef __RZTC__
	    if (feof(stdin)) clearerr(stdin);
#endif
	    if (NOT_THROWING) {
		exec_list = parser(current_line, TRUE);
		if (exec_list != NIL) eval_driver(exec_list);
	    }
	}
#ifdef HAVE_WX
	if (wx_leave_mainloop) {
	  break;
	}
#endif	
	if (stopping_flag == THROWING) {
	    if (isName(throw_node, Name_error)) {
		err_print(NULL);
	    } else if (isName(throw_node, Name_system))
		break;
	    else if (!isName(throw_node, Name_toplevel)) {
		err_logo(NO_CATCH_TAG, throw_node);
		err_print(NULL);
	    }
	    stopping_flag = RUN;
	}
	if (stopping_flag == STOP || stopping_flag == OUTPUT) {
	/*    ndprintf(stdout, "%t\n", message_texts[CANT_STOP]);   */
	    stopping_flag = RUN;
	}
    }
    //prepare_to_exit(TRUE);
    exit(0);
    return 0;
}