Training courses

Kernel and Embedded Linux

Bootlin training courses

Embedded Linux, kernel,
Yocto Project, Buildroot, real-time,
graphics, boot time, debugging...

Bootlin logo

Elixir Cross Referencer

  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
456
457
/*	$NetBSD: rcskeep.c,v 1.2 2016/01/14 04:22:39 christos Exp $	*/

/* Extract RCS keyword string values from working files.  */

/* Copyright 1982, 1988, 1989 Walter Tichy
   Copyright 1990, 1991, 1992, 1993, 1994, 1995 Paul Eggert
   Distributed under license by the Free Software Foundation, Inc.

This file is part of RCS.

RCS 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, or (at your option)
any later version.

RCS 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 RCS; see the file COPYING.
If not, write to the Free Software Foundation,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

Report problems and direct all questions to:

    rcs-bugs@cs.purdue.edu

*/

/*
 * Log: rcskeep.c,v 
 * Revision 5.10  1995/06/16 06:19:24  eggert
 * Update FSF address.
 *
 * Revision 5.9  1995/06/01 16:23:43  eggert
 * (getoldkeys): Don't panic if a Name: is empty.
 *
 * Revision 5.8  1994/03/17 14:05:48  eggert
 * Remove lint.
 *
 * Revision 5.7  1993/11/09 17:40:15  eggert
 * Use simpler timezone parsing strategy now that we're using ISO 8601 format.
 *
 * Revision 5.6  1993/11/03 17:42:27  eggert
 * Scan for Name keyword.  Improve quality of diagnostics.
 *
 * Revision 5.5  1992/07/28  16:12:44  eggert
 * Statement macro names now end in _.
 *
 * Revision 5.4  1991/08/19  03:13:55  eggert
 * Tune.
 *
 * Revision 5.3  1991/04/21  11:58:25  eggert
 * Shorten names to keep them distinct on shortname hosts.
 *
 * Revision 5.2  1990/10/04  06:30:20  eggert
 * Parse time zone offsets; future RCS versions may output them.
 *
 * Revision 5.1  1990/09/20  02:38:56  eggert
 * ci -k now checks dates more thoroughly.
 *
 * Revision 5.0  1990/08/22  08:12:53  eggert
 * Retrieve old log message if there is one.
 * Don't require final newline.
 * Remove compile-time limits; use malloc instead.  Tune.
 * Permit dates past 1999/12/31.  Ansify and Posixate.
 *
 * Revision 4.6  89/05/01  15:12:56  narten
 * changed copyright header to reflect current distribution rules
 * 
 * Revision 4.5  88/08/09  19:13:03  eggert
 * Remove lint and speed up by making FILE *fp local, not global.
 * 
 * Revision 4.4  87/12/18  11:44:21  narten
 * more lint cleanups (Guy Harris)
 * 
 * Revision 4.3  87/10/18  10:35:50  narten
 * Updating version numbers. Changes relative to 1.1 actually relative
 * to 4.1
 * 
 * Revision 1.3  87/09/24  14:00:00  narten
 * Sources now pass through lint (if you ignore printf/sprintf/fprintf 
 * warnings)
 * 
 * Revision 1.2  87/03/27  14:22:29  jenkins
 * Port to suns
 * 
 * Revision 4.1  83/05/10  16:26:44  wft
 * Added new markers Id and RCSfile; extraction added.
 * Marker matching with trymatch().
 * 
 * Revision 3.2  82/12/24  12:08:26  wft
 * added missing #endif.
 *
 * Revision 3.1  82/12/04  13:22:41  wft
 * Initial revision.
 *
 */

#include  "rcsbase.h"

libId(keepId, "Id: rcskeep.c,v 5.10 1995/06/16 06:19:24 eggert Exp ")

static int badly_terminated P((void));
static int checknum P((char const*));
static int get0val P((int,RILE*,struct buf*,int));
static int getval P((RILE*,struct buf*,int));
static int keepdate P((RILE*));
static int keepid P((int,RILE*,struct buf*));
static int keeprev P((RILE*));

int prevkeys;
struct buf prevauthor, prevdate, prevname, prevrev, prevstate;

	int
getoldkeys(fp)
	register RILE *fp;
/* Function: Tries to read keyword values for author, date,
 * revision number, and state out of the file fp.
 * If fp is null, workname is opened and closed instead of using fp.
 * The results are placed into
 * prevauthor, prevdate, prevname, prevrev, prevstate.
 * Aborts immediately if it finds an error and returns false.
 * If it returns true, it doesn't mean that any of the
 * values were found; instead, check to see whether the corresponding arrays
 * contain the empty string.
 */
{
    register int c;
    char keyword[keylength+1];
    register char * tp;
    int needs_closing;
    int prevname_found;

    if (prevkeys)
	return true;

    needs_closing = false;
    if (!fp) {
	if (!(fp = Iopen(workname, FOPEN_R_WORK, (struct stat*)0))) {
	    eerror(workname);
	    return false;
	}
	needs_closing = true;
    }

    /* initialize to empty */
    bufscpy(&prevauthor, "");
    bufscpy(&prevdate, "");
    bufscpy(&prevname, "");  prevname_found = 0;
    bufscpy(&prevrev, "");
    bufscpy(&prevstate, "");

    c = '\0'; /* anything but KDELIM */
    for (;;) {
        if ( c==KDELIM) {
	    do {
		/* try to get keyword */
		tp = keyword;
		for (;;) {
		    Igeteof_(fp, c, goto ok;)
		    switch (c) {
			default:
			    if (keyword+keylength <= tp)
				break;
			    *tp++ = c;
			    continue;

			case '\n': case KDELIM: case VDELIM:
			    break;
		    }
		    break;
		}
	    } while (c==KDELIM);
            if (c!=VDELIM) continue;
	    *tp = c;
	    Igeteof_(fp, c, break;)
	    switch (c) {
		case ' ': case '\t': break;
		default: continue;
	    }

	    switch (trymatch(keyword)) {
            case Author:
		if (!keepid(0, fp, &prevauthor))
		    return false;
		c = 0;
                break;
            case Date:
		if (!(c = keepdate(fp)))
		    return false;
                break;
            case Header:
            case Id:
#ifdef LOCALID
	    case LocalId:
#endif
		if (!(
		      getval(fp, (struct buf*)0, false) &&
		      keeprev(fp) &&
		      (c = keepdate(fp)) &&
		      keepid(c, fp, &prevauthor) &&
		      keepid(0, fp, &prevstate)
		))
		    return false;
		/* Skip either ``who'' (new form) or ``Locker: who'' (old).  */
		if (getval(fp, (struct buf*)0, true) &&
		    getval(fp, (struct buf*)0, true))
			c = 0;
		else if (nerror)
			return false;
		else
			c = KDELIM;
		break;
            case Locker:
		(void) getval(fp, (struct buf*)0, false);
		c = 0;
		break;
            case Log:
            case RCSfile:
            case Source:
		if (!getval(fp, (struct buf*)0, false))
		    return false;
		c = 0;
                break;
	    case Name:
		if (getval(fp, &prevname, false)) {
		    if (*prevname.string)
			checkssym(prevname.string);
		    prevname_found = 1;
		}
		c = 0;
		break;
            case Revision:
		if (!keeprev(fp))
		    return false;
		c = 0;
                break;
            case State:
		if (!keepid(0, fp, &prevstate))
		    return false;
		c = 0;
                break;
            default:
               continue;
            }
	    if (!c)
		Igeteof_(fp, c, c=0;)
	    if (c != KDELIM) {
		workerror("closing %c missing on keyword", KDELIM);
		return false;
	    }
	    if (prevname_found &&
		*prevauthor.string && *prevdate.string &&
		*prevrev.string && *prevstate.string
	    )
                break;
        }
	Igeteof_(fp, c, break;)
    }

 ok:
    if (needs_closing)
	Ifclose(fp);
    else
	Irewind(fp);
    prevkeys = true;
    return true;
}

	static int
badly_terminated()
{
	workerror("badly terminated keyword value");
	return false;
}

	static int
getval(fp, target, optional)
	register RILE *fp;
	struct buf *target;
	int optional;
/* Reads a keyword value from FP into TARGET.
 * Returns true if one is found, false otherwise.
 * Does not modify target if it is 0.
 * Do not report an error if OPTIONAL is set and KDELIM is found instead.
 */
{
	int c;
	Igeteof_(fp, c, return badly_terminated();)
	return get0val(c, fp, target, optional);
}

	static int
get0val(c, fp, target, optional)
	register int c;
	register RILE *fp;
	struct buf *target;
	int optional;
/* Reads a keyword value from C+FP into TARGET, perhaps OPTIONALly.
 * Same as getval, except C is the lookahead character.
 */
{   register char * tp;
    char const *tlim;
    register int got1;

    if (target) {
	bufalloc(target, 1);
	tp = target->string;
	tlim = tp + target->size;
    } else
	tlim = tp = 0;
    got1 = false;
    for (;;) {
	switch (c) {
	    default:
		got1 = true;
		if (tp) {
		    *tp++ = c;
		    if (tlim <= tp)
			tp = bufenlarge(target, &tlim);
		}
		break;

	    case ' ':
	    case '\t':
		if (tp) {
		    *tp = 0;
#		    ifdef KEEPTEST
			VOID printf("getval: %s\n", target);
#		    endif
		}
		return got1;

	    case KDELIM:
		if (!got1 && optional)
		    return false;
		/* fall into */
	    case '\n':
	    case 0:
		return badly_terminated();
	}
	Igeteof_(fp, c, return badly_terminated();)
    }
}


	static int
keepdate(fp)
	RILE *fp;
/* Function: reads a date prevdate; checks format
 * Return 0 on error, lookahead character otherwise.
 */
{
    struct buf prevday, prevtime;
    register int c;

    c = 0;
    bufautobegin(&prevday);
    if (getval(fp,&prevday,false)) {
	bufautobegin(&prevtime);
	if (getval(fp,&prevtime,false)) {
	    Igeteof_(fp, c, c=0;)
	    if (c) {
		register char const *d = prevday.string, *t = prevtime.string;
		bufalloc(&prevdate, strlen(d) + strlen(t) + 9);
		VOID sprintf(prevdate.string, "%s%s %s%s",
		    /* Parse dates put out by old versions of RCS.  */
		      isdigit(d[0]) && isdigit(d[1]) && !isdigit(d[2])
		    ? "19" : "",
		    d, t,
		    strchr(t,'-') || strchr(t,'+')  ?  ""  :  "+0000"
		);
	    }
	}
	bufautoend(&prevtime);
    }
    bufautoend(&prevday);
    return c;
}

	static int
keepid(c, fp, b)
	int c;
	RILE *fp;
	struct buf *b;
/* Get previous identifier from C+FP into B.  */
{
	if (!c)
	    Igeteof_(fp, c, return false;)
	if (!get0val(c, fp, b, false))
	    return false;
	checksid(b->string);
	return !nerror;
}

	static int
keeprev(fp)
	RILE *fp;
/* Get previous revision from FP into prevrev.  */
{
	return getval(fp,&prevrev,false) && checknum(prevrev.string);
}


	static int
checknum(s)
	char const *s;
{
    register char const *sp;
    register int dotcount = 0;
    for (sp=s; ; sp++) {
	switch (*sp) {
	    case 0:
		if (dotcount & 1)
		    return true;
		else
		    break;
	    
	    case '.':
		dotcount++;
		continue;
	    
	    default:
		if (isdigit(*sp))
		    continue;
		break;
	}
	break;
    }
    workerror("%s is not a revision number", s);
    return false;
}



#ifdef KEEPTEST

/* Print the keyword values found.  */

char const cmdid[] ="keeptest";

	int
main(argc, argv)
int  argc; char  *argv[];
{
        while (*(++argv)) {
		workname = *argv;
		getoldkeys((RILE*)0);
                VOID printf("%s:  revision: %s, date: %s, author: %s, name: %s, state: %s\n",
			    *argv, prevrev.string, prevdate.string, prevauthor.string, prevname.string, prevstate.string);
	}
	exitmain(EXIT_SUCCESS);
}
#endif