summaryrefslogtreecommitdiff
path: root/support/dktools/dk4strm.c
blob: 744623b554f668f446fbc40835eb52a95292339f (plain)
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
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
/*
	WARNING: This file was generated by dkct.
	Changes you make here will be lost if dkct is run again!
	You should modify the original source and run dkct on it.
	Original source: dk4strm.ctr
*/

/*
Copyright (C) 2015-2017, Dirk Krause

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright notice,
  this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above opyright notice,
  this list of conditions and the following disclaimer in the documentation
  and/or other materials provided with the distribution.
* Neither the name of the author nor the names of contributors may be used
  to endorse or promote products derived from this software without specific
  prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED.
IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

/**	@file dk4strm.c The dk4strm module.
*/


#line 358 "dk4strm.ctr"



#include "dk4strm.h"
#include "dk4mem.h"
#include "dk4enc.h"
#include "dk4numco.h"





#line 369 "dk4strm.ctr"




static
void
dk4stream_api_init(dk4_stream_api_t *ptr)
{
  

#line 378 "dk4strm.ctr"
  DK4_MEMRES(ptr, sizeof(dk4_stream_api_t));
  ptr->d = NULL;
  ptr->b = NULL;
  ptr->sz_in = 0;
  ptr->sz_out = 0;
  ptr->res = 0;
  ptr->cmd = 0;
  

#line 386 "dk4strm.ctr"
}



/**	Release memory allocated by a stream.
	@param	strm	Stream to release.
*/
static
void
dk4stream_release_memory(dk4_stream_t *strm)
{
  

#line 398 "dk4strm.ctr"
  if (NULL != strm) {
    dk4mem_release(strm->bi);
    dk4mem_release(strm->bo);
    strm->d = NULL;
    strm->fct = NULL;
    strm->bwr = (dk4_um_t)0UL;
    strm->szbi = 0;
    strm->szbo = 0;
    strm->usbi = 0;
    strm->usbo = 0;
    strm->rebi = 0;
    strm->fl = 0;
    strm->feoi = 0;
    strm->bwo = 0;
    dk4mem_free(strm);
  } 

#line 414 "dk4strm.ctr"
}




/**	Flush write buffer.
*/
static
int
dk4stream_i_flush_write(dk4_stream_t *strm, int flfl, dk4_er_t *erp)
{
  dk4_stream_api_t	api;
  int		 	back	=	1;
  

#line 428 "dk4strm.ctr"
  /*	Write buffer contents (if any) downwards.
  */
  if (0 != strm->usbo) {		

#line 431 "dk4strm.ctr"
    dk4stream_api_init(&api);
    api.cmd   = DK4_STREAM_API_WRITE;
    api.d     = strm->d;
    api.b     = strm->bo;
    api.sz_in = strm->usbo;
    (*(strm->fct))(&api);
    if (0 == api.res) {
      back = 0;
      dk4error_set_simple_error_code(erp, DK4_E_WRITE_FAILED);
    }
  }
  /*	Flush downwards.
  */
  if (0 < flfl) {			

#line 445 "dk4strm.ctr"
    dk4stream_api_init(&api);
    api.cmd = DK4_STREAM_API_FLUSH;
    api.d   = strm->d;
    (*(strm->fct))(&api);
    if (0 == api.res) {
      back = 0;
      dk4error_set_simple_error_code(erp, DK4_E_FLUSH_FAILED);
    }
  }
  /*	Indicate output buffer is empty.
  */
  strm->usbo = 0;
  

#line 458 "dk4strm.ctr"
  return back;
}



/**	Internal function to write one character after checking stream.
	@param	strm	Stream to write to.
	@param	c	Character to write.
	@param	erp	Error report, may be NULL.
	@return	1 on success, 0 on error.
*/
static
int
dk4stream_i_write_byte(dk4_stream_t *strm, char c, dk4_er_t *erp)
{
  int		 back	=	0;
  

#line 475 "dk4strm.ctr"
  if (strm->usbo < strm->szbo) {
    (strm->bo)[strm->usbo] = c;
    strm->usbo += 1;
    strm->bwr += (dk4_um_t)1UL;
    if ((dk4_um_t)0UL == strm->bwr) { strm->bwo = 1; }
    back = 1;
    if (strm->usbo >= strm->szbo) {
      back = dk4stream_i_flush_write(strm, 0, erp);
    }
  } 

#line 485 "dk4strm.ctr"
  return back;
}




/**	Internal function to read a single character.
	@param	dst	Pointer to variable for result.
	@param	strm	Stream to read from.
	@param	erp	Error report, may be NULL.
	@return	1 on success, 0 on error.
*/
static
int
dk4stream_i_c8_read_byte(char *dst, dk4_stream_t *strm, dk4_er_t *erp)
{
  dk4_stream_api_t	api;
  int		 	back	=	0;
  

#line 504 "dk4strm.ctr"
  if ((0 == strm->feoi) && ((strm->usbi == 0) || (strm->rebi >= strm->usbi))) {
    

#line 506 "dk4strm.ctr"
    dk4stream_api_init(&api);
    api.cmd   = DK4_STREAM_API_READ;
    api.d     = strm->d;
    api.b     = strm->bi;
    api.sz_in = strm->szbi;
    (*(strm->fct))(&api);
    if (0 != api.res) {			

#line 513 "dk4strm.ctr"
      strm->rebi = 0;
      strm->usbi = api.sz_out;
      if (api.sz_out < strm->szbi) {	

#line 516 "dk4strm.ctr"
        if (0 == strm->zreof) {
          dk4stream_api_init(&api);
	  api.cmd = DK4_STREAM_API_AT_END;
	  api.d   = strm->d;
	  (*(strm->fct))(&api);
	  if (0 != api.res) {		

#line 522 "dk4strm.ctr"
	    strm->feoi = 1;
	  }
	}
      }
    } else {				

#line 527 "dk4strm.ctr"
      if (0 != strm->zreof) {
        strm->feoi = 1;
      } else {
        dk4stream_api_init(&api);
        api.cmd = DK4_STREAM_API_AT_END;
        api.d   = strm->d;
        (*(strm->fct))(&api);
        if (0 != api.res) {		

#line 535 "dk4strm.ctr"
          strm->feoi = 1;
        }
      }
    }
  } else {		

#line 540 "dk4strm.ctr"
  }
  if ((0 < strm->usbi) && (strm->rebi < strm->usbi)) {
    

#line 543 "dk4strm.ctr"
    *dst = (strm->bi)[strm->rebi];
    strm->rebi += 1;
    back = 1;
  } else {		

#line 547 "dk4strm.ctr"
  }
  

#line 549 "dk4strm.ctr"
  return back;
}




dk4_stream_t *
dk4stream_open(
  void			*obj,
  dk4_stream_api_fct_t	*fct,
  int			 fl,
  size_t		 ibs,
  size_t		 obs,
  dk4_er_t		*erp
)
{
  dk4_stream_api_t	 api;
  dk4_stream_t		*back	=	NULL;
  

#line 568 "dk4strm.ctr"
  /*	Check arguments
  */
  if ((NULL == obj) || (NULL == fct)) {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
    goto finished;
  }
  /*	Check flag, at least read or write must be set
  */
  if (0 == (fl & (DK4_STREAM_READ | DK4_STREAM_WRITE))) {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
    goto finished;
  }
  /*	Allocate memory for stream itself
  */
  back = dk4mem_new(dk4_stream_t,1,erp);
  if (NULL == back) {
    goto finished;
  }
  /*	Initialize members
  */
  back->d = obj; back->fct = fct;
  back->bi = NULL; back->bo = NULL;
  back->bwr = (dk4_um_t)0UL;
  back->szbi = 0; back->szbo = 0;
  back->usbi = 0; back->usbo = 0; back->rebi = 0;
  back->fl = fl; back->feoi = 0;
  back->bwo = 0;
  back->oenc = DK4_FILE_ENCODING_ASCII;
  back->zreof = 0;
  /*	Allocate input buffer or destroy object
  */
  if (fl & DK4_STREAM_READ) {
    back->szbi = ((0 < ibs) ? ibs : 4096);
    back->bi = dk4mem_new(char,back->szbi,erp);
    if (NULL == back->bi) {
      dk4stream_release_memory(back);
      back = NULL;
      goto finished;
    }
  }
  /*	Allocate output buffer or destroy object
  */
  if (fl & DK4_STREAM_WRITE) {
    back->szbo = ((0 < obs) ? obs : 4096);
    back->bo = dk4mem_new(char,back->szbo,erp);
    if (NULL == back->bo) {
      dk4stream_release_memory(back);
      back = NULL;
      goto finished;
    }
  }
  /*	Check whether reading zero bytes indicates end of input
  */
  dk4stream_api_init(&api);
  api.cmd = DK4_STREAM_API_ZERO_READ_IS_EOF;
  api.d   = obj;
  (*(back->fct))(&api);
  if (0 != api.res) { back->zreof = 1; }
finished:
  

#line 628 "dk4strm.ctr"
  return back;
}



int
dk4stream_close(dk4_stream_t *strm, dk4_er_t *erp)
{
  dk4_stream_api_t	api;
  int		 	back	=	0;
  

#line 639 "dk4strm.ctr"
  /*	Check argument.
  */
  if (NULL == strm) {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
    goto finished;
  }

  /*	Success so far, unless there are errors in the next sections.
  */
  back = 1;

  /*	Write bytes in output buffer downwards.
  */
  if ((strm->fl) & DK4_STREAM_WRITE) {
    dk4stream_api_init(&api);
    api.cmd   = DK4_STREAM_API_WRITE;
    api.d     = strm->d;
    api.b     = strm->bo;
    api.sz_in = strm->usbo;
    (*(strm->fct))(&api);
    if (0 == api.res) {
      back = 0;
      dk4error_set_simple_error_code(erp, DK4_E_WRITE_FAILED);
    }
  }

  /*	Attempt to flush downwards.
  */
  if ((strm->fl) & DK4_STREAM_WRITE) {
    dk4stream_api_init(&api);
    api.cmd = DK4_STREAM_API_FLUSH;
    api.d   = strm->d;
    (*(strm->fct))(&api);
    if (0 == api.res) {
      back = 0;
      dk4error_set_simple_error_code(erp, DK4_E_FLUSH_FAILED);
    }
  }

  /*	Finalize downward data structures.
  */
  dk4stream_api_init(&api);
  api.cmd = DK4_STREAM_API_CLOSE;
  api.d   = strm->d;
  (*(strm->fct))(&api);
  if (0 == api.res) {
    back = 0;
    dk4error_set_simple_error_code(erp, DK4_E_CLOSE_FAILED);
  }

  /*	Release memory.
  */
  dk4stream_release_memory(strm);

finished:
  

#line 695 "dk4strm.ctr"
  return back;
}



int
dk4stream_write_byte(dk4_stream_t *strm, char c, dk4_er_t *erp)
{
  int		 back	=	0;
  

#line 705 "dk4strm.ctr"
  if (NULL != strm) {
    if ((strm->fl) & DK4_STREAM_WRITE) {
      back = dk4stream_i_write_byte(strm, c, erp);
    } else {
      dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
    }
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  } 

#line 714 "dk4strm.ctr"
  return back;
}



#if	NOT_OPTIMIZED

int
dk4stream_write(dk4_stream_t *strm, const void *b, size_t sz, dk4_er_t *erp)
{
  char		*cptr;			/* Traverse buffer */
  int		 back	=	0;
  

#line 727 "dk4strm.ctr"
  if ((NULL != strm) && (NULL != b) && (0 < sz)) {
    if ((strm->fl) & DK4_STREAM_WRITE) {
      back = 1;
      cptr = (char *)b;
      while(sz--) {
        if (0 == dk4stream_i_write_byte(strm, *(cptr++), erp)) {
	  back = 0;
	}
      }
    } else {
      dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
    }
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  } 

#line 742 "dk4strm.ctr"
  return back;
}

#else

int
dk4stream_write(dk4_stream_t *strm, const void *b, size_t sz, dk4_er_t *erp)
{
  char		*cptr;			/* Traverse buffer */
  size_t	 bc;
  int		 back	=	0;
  int		 cc;

  

#line 756 "dk4strm.ctr"
  if ((NULL != strm) && (NULL != b) && (0 < sz)) {
    if ((strm->fl) & DK4_STREAM_WRITE) {
      back = 1;
      cptr = (char *)b;
      do {
        cc = 0;					

#line 762 "dk4strm.ctr"
        if (0 < sz) {
	  if (strm->usbo < strm->szbo) {	

#line 764 "dk4strm.ctr"
	    /* Attempt to copy as many bytes as still free in output buffer */
	    bc = strm->szbo - strm->usbo; 

#line 766 "dk4strm.ctr"
	    /* If not enough bytes available, correct number of bytes */
	    if (bc > sz) { bc = sz; }	  

#line 768 "dk4strm.ctr"
	    DK4_MEMCPY(&((strm->bo)[strm->usbo]), cptr, bc);
	    strm->usbo	+= bc;		

#line 770 "dk4strm.ctr"
	    cptr	=  &(cptr[bc]);
	    sz		-= bc;		

#line 772 "dk4strm.ctr"
	    if ((DK4_UM_MAX - (dk4_um_t)bc) < strm->bwr) {
	      strm->bwo = 1;			

#line 774 "dk4strm.ctr"
	      back	= 0;
	    }
	    strm->bwr   += (dk4_um_t)bc; 

#line 777 "dk4strm.ctr"
	    if (strm->usbo >= strm->szbo) {	

#line 778 "dk4strm.ctr"
	      if (0 == dk4stream_i_flush_write(strm, 0, erp)) {
	        back = 0;			

#line 780 "dk4strm.ctr"
	      }
	    }
	    if (0 < sz) { cc = 1; }
	  } else {				

#line 784 "dk4strm.ctr"
	    if (0 == dk4stream_i_flush_write(strm, 0, erp)) {
	      back = 0;				

#line 786 "dk4strm.ctr"
	    }
	  }
	}
      } while(0 != cc);
    } else {					

#line 791 "dk4strm.ctr"
      dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
    }
  } else {					

#line 794 "dk4strm.ctr"
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  } 

#line 796 "dk4strm.ctr"
  return back;
}

#endif



int
dk4stream_write_char_string(dk4_stream_t *strm, const char *str, dk4_er_t *erp)
{
  size_t	sl;
  int		back	= 0;
  if ((NULL != strm) && (NULL != str)) {
    sl = strlen(str);
    back = dk4stream_write(strm, str, sl, erp);
  }
  else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  }
  return back;
}



int
dk4stream_flush_read(dk4_stream_t *strm, dk4_er_t *erp)
{
  int back = 0;
  

#line 825 "dk4strm.ctr"
  if (NULL != strm) {
    if ((strm->fl) & DK4_STREAM_READ) {
      back = 1;
      strm->usbi = 0;
      strm->rebi = 0;
    } else {
      dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
    }
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  } 

#line 836 "dk4strm.ctr"
  return back;
}



int
dk4stream_flush_write(dk4_stream_t *strm, int flfl, dk4_er_t *erp)
{
  int back = 0;
  

#line 846 "dk4strm.ctr"
  if (NULL != strm) {
    if ((strm->fl) & DK4_STREAM_WRITE) {
      back = dk4stream_i_flush_write(strm, flfl, erp);
    } else {
      dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
    }
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  } 

#line 855 "dk4strm.ctr"
  return back;
}



int
dk4stream_flush(dk4_stream_t *strm, int flfl, dk4_er_t *erp)
{
  int		 back	=	0;
  

#line 865 "dk4strm.ctr"
  if (NULL != strm) {
    back = 1;
    if ((strm->fl) & DK4_STREAM_WRITE) {
      if (0 == dk4stream_flush_write(strm, flfl, erp)) {
        back = 0;
      }
    }
    if ((strm->fl) & DK4_STREAM_READ) {
      if (0 == dk4stream_flush_read(strm, erp)) {
        back = 0;
      }
    }
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  } 

#line 880 "dk4strm.ctr"
  return back;
}



int
dk4stream_c8_read_byte(char *dst, dk4_stream_t *strm, dk4_er_t *erp)
{
  int		 back = 0;
  

#line 890 "dk4strm.ctr"
  if ((NULL != dst) && (NULL != strm)) {	

#line 891 "dk4strm.ctr"
    if ((strm->fl) & DK4_STREAM_READ) {		

#line 892 "dk4strm.ctr"
      back = dk4stream_i_c8_read_byte(dst, strm, erp);
    } else {
      dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
    }
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  } 

#line 899 "dk4strm.ctr"
  return back;
}



int
dk4stream_read(void *b, size_t *szptr, dk4_stream_t *strm, dk4_er_t *erp)
{
  char		*cptr;			/* Traverse the buffer */
  size_t	 szin;			/* Input: Available buffer size */
  size_t	 szout;			/* Output: Used buffer size */
  int		 back	=	0;	/* Function result */
  int		 cc	=	1;	/* Flag: Can continue */
  

#line 913 "dk4strm.ctr"
  if ((NULL != b) && (NULL != szptr) && (NULL != strm)) {
    if (((strm->fl) & DK4_STREAM_READ) && (0 < *szptr)) {
      szin = *szptr; szout = 0;
      cptr = (char *)b;
      do {
        if (0 != dk4stream_i_c8_read_byte(cptr++, strm, erp)) {
	  szout++;
	  if (szout >= szin) {
	    cc = 0;
	    back = 1;
	  }
	} else {
	  cc = 0;
	  if (0 < szout) {
	    back = 1;
	  } else {
	    if (0 != dk4stream_found_eof(strm)) {
	      dk4error_set_simple_error_code(erp, DK4_E_NOT_FOUND);
	    } else {
	      dk4error_set_simple_error_code(erp, DK4_E_READ_FAILED);
	    }
	  }
	}
      } while (0 != cc);
      *szptr = szout;
    } else {
      dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
    }
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  } 

#line 944 "dk4strm.ctr"
  return back;
}



dk4_um_t
dk4stream_bytes_written(const dk4_stream_t *strm)
{
  dk4_um_t	back	=	(dk4_um_t)0UL;
  if (NULL != strm) { back = strm->bwr; }
  return back;
}



int
dk4stream_overflow_bytes_written(const dk4_stream_t *strm)
{
  int back = 0;
  if (NULL != strm) { back = strm->bwo; }
  return back;
}



int
dk4stream_found_eof(const dk4_stream_t *strm)
{
  int back = 0;
  if (NULL != strm) {
    back = strm->feoi;
  }
  return back;
}