summaryrefslogtreecommitdiff
path: root/tools/gator/daemon/mxml/mxml-node.c
blob: 44af759f9de3298d97697ebbbf331e9dd5a03d48 (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
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
/*
 * "$Id: mxml-node.c 436 2011-01-22 01:02:05Z mike $"
 *
 * Node support code for Mini-XML, a small XML-like file parsing library.
 *
 * Copyright 2003-2011 by Michael R Sweet.
 *
 * These coded instructions, statements, and computer programs are the
 * property of Michael R Sweet and are protected by Federal copyright
 * law.  Distribution and use rights are outlined in the file "COPYING"
 * which should have been included with this file.  If this file is
 * missing or damaged, see the license at:
 *
 *     http://www.minixml.org/
 *
 * Contents:
 *
 *   mxmlAdd()         - Add a node to a tree.
 *   mxmlDelete()      - Delete a node and all of its children.
 *   mxmlGetRefCount() - Get the current reference (use) count for a node.
 *   mxmlNewCDATA()    - Create a new CDATA node.
 *   mxmlNewCustom()   - Create a new custom data node.
 *   mxmlNewElement()  - Create a new element node.
 *   mxmlNewInteger()  - Create a new integer node.
 *   mxmlNewOpaque()   - Create a new opaque string.
 *   mxmlNewReal()     - Create a new real number node.
 *   mxmlNewText()     - Create a new text fragment node.
 *   mxmlNewTextf()    - Create a new formatted text fragment node.
 *   mxmlRemove()      - Remove a node from its parent.
 *   mxmlNewXML()      - Create a new XML document tree.
 *   mxmlRelease()     - Release a node.
 *   mxmlRetain()      - Retain a node.
 *   mxml_new()        - Create a new node.
 */

/*
 * Include necessary headers...
 */

#include "config.h"
#include "mxml.h"


/*
 * Local functions...
 */

static mxml_node_t	*mxml_new(mxml_node_t *parent, mxml_type_t type);


/*
 * 'mxmlAdd()' - Add a node to a tree.
 *
 * Adds the specified node to the parent. If the child argument is not
 * NULL, puts the new node before or after the specified child depending
 * on the value of the where argument. If the child argument is NULL,
 * puts the new node at the beginning of the child list (MXML_ADD_BEFORE)
 * or at the end of the child list (MXML_ADD_AFTER). The constant
 * MXML_ADD_TO_PARENT can be used to specify a NULL child pointer.
 */

void
mxmlAdd(mxml_node_t *parent,		/* I - Parent node */
        int         where,		/* I - Where to add, MXML_ADD_BEFORE or MXML_ADD_AFTER */
        mxml_node_t *child,		/* I - Child node for where or MXML_ADD_TO_PARENT */
	mxml_node_t *node)		/* I - Node to add */
{
#ifdef DEBUG
  fprintf(stderr, "mxmlAdd(parent=%p, where=%d, child=%p, node=%p)\n", parent,
          where, child, node);
#endif /* DEBUG */

 /*
  * Range check input...
  */

  if (!parent || !node)
    return;

#if DEBUG > 1
  fprintf(stderr, "    BEFORE: node->parent=%p\n", node->parent);
  if (parent)
  {
    fprintf(stderr, "    BEFORE: parent->child=%p\n", parent->child);
    fprintf(stderr, "    BEFORE: parent->last_child=%p\n", parent->last_child);
    fprintf(stderr, "    BEFORE: parent->prev=%p\n", parent->prev);
    fprintf(stderr, "    BEFORE: parent->next=%p\n", parent->next);
  }
#endif /* DEBUG > 1 */

 /*
  * Remove the node from any existing parent...
  */

  if (node->parent)
    mxmlRemove(node);

 /*
  * Reset pointers...
  */

  node->parent = parent;

  switch (where)
  {
    case MXML_ADD_BEFORE :
        if (!child || child == parent->child || child->parent != parent)
	{
	 /*
	  * Insert as first node under parent...
	  */

	  node->next = parent->child;

	  if (parent->child)
	    parent->child->prev = node;
	  else
	    parent->last_child = node;

	  parent->child = node;
	}
	else
	{
	 /*
	  * Insert node before this child...
	  */

	  node->next = child;
	  node->prev = child->prev;

	  if (child->prev)
	    child->prev->next = node;
	  else
	    parent->child = node;

	  child->prev = node;
	}
        break;

    case MXML_ADD_AFTER :
        if (!child || child == parent->last_child || child->parent != parent)
	{
	 /*
	  * Insert as last node under parent...
	  */

	  node->parent = parent;
	  node->prev   = parent->last_child;

	  if (parent->last_child)
	    parent->last_child->next = node;
	  else
	    parent->child = node;

	  parent->last_child = node;
        }
	else
	{
	 /*
	  * Insert node after this child...
	  */

	  node->prev = child;
	  node->next = child->next;

	  if (child->next)
	    child->next->prev = node;
	  else
	    parent->last_child = node;

	  child->next = node;
	}
        break;
  }

#if DEBUG > 1
  fprintf(stderr, "    AFTER: node->parent=%p\n", node->parent);
  if (parent)
  {
    fprintf(stderr, "    AFTER: parent->child=%p\n", parent->child);
    fprintf(stderr, "    AFTER: parent->last_child=%p\n", parent->last_child);
    fprintf(stderr, "    AFTER: parent->prev=%p\n", parent->prev);
    fprintf(stderr, "    AFTER: parent->next=%p\n", parent->next);
  }
#endif /* DEBUG > 1 */
}


/*
 * 'mxmlDelete()' - Delete a node and all of its children.
 *
 * If the specified node has a parent, this function first removes the
 * node from its parent using the mxmlRemove() function.
 */

void
mxmlDelete(mxml_node_t *node)		/* I - Node to delete */
{
  int	i;				/* Looping var */


#ifdef DEBUG
  fprintf(stderr, "mxmlDelete(node=%p)\n", node);
#endif /* DEBUG */

 /*
  * Range check input...
  */

  if (!node)
    return;

 /*
  * Remove the node from its parent, if any...
  */

  mxmlRemove(node);

 /*
  * Delete children...
  */

  while (node->child)
    mxmlDelete(node->child);

 /*
  * Now delete any node data...
  */

  switch (node->type)
  {
    case MXML_ELEMENT :
        if (node->value.element.name)
	  free(node->value.element.name);

	if (node->value.element.num_attrs)
	{
	  for (i = 0; i < node->value.element.num_attrs; i ++)
	  {
	    if (node->value.element.attrs[i].name)
	      free(node->value.element.attrs[i].name);
	    if (node->value.element.attrs[i].value)
	      free(node->value.element.attrs[i].value);
	  }

          free(node->value.element.attrs);
	}
        break;
    case MXML_INTEGER :
       /* Nothing to do */
        break;
    case MXML_OPAQUE :
        if (node->value.opaque)
	  free(node->value.opaque);
        break;
    case MXML_REAL :
       /* Nothing to do */
        break;
    case MXML_TEXT :
        if (node->value.text.string)
	  free(node->value.text.string);
        break;
    case MXML_CUSTOM :
        if (node->value.custom.data &&
	    node->value.custom.destroy)
	  (*(node->value.custom.destroy))(node->value.custom.data);
	break;
    default :
        break;
  }

 /*
  * Free this node...
  */

  free(node);
}


/*
 * 'mxmlGetRefCount()' - Get the current reference (use) count for a node.
 *
 * The initial reference count of new nodes is 1. Use the @link mxmlRetain@
 * and @link mxmlRelease@ functions to increment and decrement a node's
 * reference count.
 *
 * @since Mini-XML 2.7@.
 */

int					/* O - Reference count */
mxmlGetRefCount(mxml_node_t *node)	/* I - Node */
{
 /*
  * Range check input...
  */

  if (!node)
    return (0);

 /*
  * Return the reference count...
  */

  return (node->ref_count);
}


/*
 * 'mxmlNewCDATA()' - Create a new CDATA node.
 *
 * The new CDATA node is added to the end of the specified parent's child
 * list. The constant MXML_NO_PARENT can be used to specify that the new
 * CDATA node has no parent. The data string must be nul-terminated and
 * is copied into the new node. CDATA nodes use the MXML_ELEMENT type.
 *
 * @since Mini-XML 2.3@
 */

mxml_node_t *				/* O - New node */
mxmlNewCDATA(mxml_node_t *parent,	/* I - Parent node or MXML_NO_PARENT */
	     const char  *data)		/* I - Data string */
{
  mxml_node_t	*node;			/* New node */


#ifdef DEBUG
  fprintf(stderr, "mxmlNewCDATA(parent=%p, data=\"%s\")\n",
          parent, data ? data : "(null)");
#endif /* DEBUG */

 /*
  * Range check input...
  */

  if (!data)
    return (NULL);

 /*
  * Create the node and set the name value...
  */

  if ((node = mxml_new(parent, MXML_ELEMENT)) != NULL)
    node->value.element.name = _mxml_strdupf("![CDATA[%s]]", data);

  return (node);
}


/*
 * 'mxmlNewCustom()' - Create a new custom data node.
 *
 * The new custom node is added to the end of the specified parent's child
 * list. The constant MXML_NO_PARENT can be used to specify that the new
 * element node has no parent. NULL can be passed when the data in the
 * node is not dynamically allocated or is separately managed.
 *
 * @since Mini-XML 2.1@
 */

mxml_node_t *				/* O - New node */
mxmlNewCustom(
    mxml_node_t              *parent,	/* I - Parent node or MXML_NO_PARENT */
    void                     *data,	/* I - Pointer to data */
    mxml_custom_destroy_cb_t destroy)	/* I - Function to destroy data */
{
  mxml_node_t	*node;			/* New node */


#ifdef DEBUG
  fprintf(stderr, "mxmlNewCustom(parent=%p, data=%p, destroy=%p)\n", parent,
          data, destroy);
#endif /* DEBUG */

 /*
  * Create the node and set the value...
  */

  if ((node = mxml_new(parent, MXML_CUSTOM)) != NULL)
  {
    node->value.custom.data    = data;
    node->value.custom.destroy = destroy;
  }

  return (node);
}


/*
 * 'mxmlNewElement()' - Create a new element node.
 *
 * The new element node is added to the end of the specified parent's child
 * list. The constant MXML_NO_PARENT can be used to specify that the new
 * element node has no parent.
 */

mxml_node_t *				/* O - New node */
mxmlNewElement(mxml_node_t *parent,	/* I - Parent node or MXML_NO_PARENT */
               const char  *name)	/* I - Name of element */
{
  mxml_node_t	*node;			/* New node */


#ifdef DEBUG
  fprintf(stderr, "mxmlNewElement(parent=%p, name=\"%s\")\n", parent,
          name ? name : "(null)");
#endif /* DEBUG */

 /*
  * Range check input...
  */

  if (!name)
    return (NULL);

 /*
  * Create the node and set the element name...
  */

  if ((node = mxml_new(parent, MXML_ELEMENT)) != NULL)
    node->value.element.name = strdup(name);

  return (node);
}


/*
 * 'mxmlNewInteger()' - Create a new integer node.
 *
 * The new integer node is added to the end of the specified parent's child
 * list. The constant MXML_NO_PARENT can be used to specify that the new
 * integer node has no parent.
 */

mxml_node_t *				/* O - New node */
mxmlNewInteger(mxml_node_t *parent,	/* I - Parent node or MXML_NO_PARENT */
               int         integer)	/* I - Integer value */
{
  mxml_node_t	*node;			/* New node */


#ifdef DEBUG
  fprintf(stderr, "mxmlNewInteger(parent=%p, integer=%d)\n", parent, integer);
#endif /* DEBUG */

 /*
  * Create the node and set the element name...
  */

  if ((node = mxml_new(parent, MXML_INTEGER)) != NULL)
    node->value.integer = integer;

  return (node);
}


/*
 * 'mxmlNewOpaque()' - Create a new opaque string.
 *
 * The new opaque node is added to the end of the specified parent's child
 * list. The constant MXML_NO_PARENT can be used to specify that the new
 * opaque node has no parent. The opaque string must be nul-terminated and
 * is copied into the new node.
 */

mxml_node_t *				/* O - New node */
mxmlNewOpaque(mxml_node_t *parent,	/* I - Parent node or MXML_NO_PARENT */
              const char  *opaque)	/* I - Opaque string */
{
  mxml_node_t	*node;			/* New node */


#ifdef DEBUG
  fprintf(stderr, "mxmlNewOpaque(parent=%p, opaque=\"%s\")\n", parent,
          opaque ? opaque : "(null)");
#endif /* DEBUG */

 /*
  * Range check input...
  */

  if (!opaque)
    return (NULL);

 /*
  * Create the node and set the element name...
  */

  if ((node = mxml_new(parent, MXML_OPAQUE)) != NULL)
    node->value.opaque = strdup(opaque);

  return (node);
}


/*
 * 'mxmlNewReal()' - Create a new real number node.
 *
 * The new real number node is added to the end of the specified parent's
 * child list. The constant MXML_NO_PARENT can be used to specify that
 * the new real number node has no parent.
 */

mxml_node_t *				/* O - New node */
mxmlNewReal(mxml_node_t *parent,	/* I - Parent node or MXML_NO_PARENT */
            double      real)		/* I - Real number value */
{
  mxml_node_t	*node;			/* New node */


#ifdef DEBUG
  fprintf(stderr, "mxmlNewReal(parent=%p, real=%g)\n", parent, real);
#endif /* DEBUG */

 /*
  * Create the node and set the element name...
  */

  if ((node = mxml_new(parent, MXML_REAL)) != NULL)
    node->value.real = real;

  return (node);
}


/*
 * 'mxmlNewText()' - Create a new text fragment node.
 *
 * The new text node is added to the end of the specified parent's child
 * list. The constant MXML_NO_PARENT can be used to specify that the new
 * text node has no parent. The whitespace parameter is used to specify
 * whether leading whitespace is present before the node. The text
 * string must be nul-terminated and is copied into the new node.  
 */

mxml_node_t *				/* O - New node */
mxmlNewText(mxml_node_t *parent,	/* I - Parent node or MXML_NO_PARENT */
            int         whitespace,	/* I - 1 = leading whitespace, 0 = no whitespace */
	    const char  *string)	/* I - String */
{
  mxml_node_t	*node;			/* New node */


#ifdef DEBUG
  fprintf(stderr, "mxmlNewText(parent=%p, whitespace=%d, string=\"%s\")\n",
          parent, whitespace, string ? string : "(null)");
#endif /* DEBUG */

 /*
  * Range check input...
  */

  if (!string)
    return (NULL);

 /*
  * Create the node and set the text value...
  */

  if ((node = mxml_new(parent, MXML_TEXT)) != NULL)
  {
    node->value.text.whitespace = whitespace;
    node->value.text.string     = strdup(string);
  }

  return (node);
}


/*
 * 'mxmlNewTextf()' - Create a new formatted text fragment node.
 *
 * The new text node is added to the end of the specified parent's child
 * list. The constant MXML_NO_PARENT can be used to specify that the new
 * text node has no parent. The whitespace parameter is used to specify
 * whether leading whitespace is present before the node. The format
 * string must be nul-terminated and is formatted into the new node.  
 */

mxml_node_t *				/* O - New node */
mxmlNewTextf(mxml_node_t *parent,	/* I - Parent node or MXML_NO_PARENT */
             int         whitespace,	/* I - 1 = leading whitespace, 0 = no whitespace */
	     const char  *format,	/* I - Printf-style frmat string */
	     ...)			/* I - Additional args as needed */
{
  mxml_node_t	*node;			/* New node */
  va_list	ap;			/* Pointer to arguments */


#ifdef DEBUG
  fprintf(stderr, "mxmlNewTextf(parent=%p, whitespace=%d, format=\"%s\", ...)\n",
          parent, whitespace, format ? format : "(null)");
#endif /* DEBUG */

 /*
  * Range check input...
  */

  if (!format)
    return (NULL);

 /*
  * Create the node and set the text value...
  */

  if ((node = mxml_new(parent, MXML_TEXT)) != NULL)
  {
    va_start(ap, format);

    node->value.text.whitespace = whitespace;
    node->value.text.string     = _mxml_vstrdupf(format, ap);

    va_end(ap);
  }

  return (node);
}


/*
 * 'mxmlRemove()' - Remove a node from its parent.
 *
 * Does not free memory used by the node - use mxmlDelete() for that.
 * This function does nothing if the node has no parent.
 */

void
mxmlRemove(mxml_node_t *node)		/* I - Node to remove */
{
#ifdef DEBUG
  fprintf(stderr, "mxmlRemove(node=%p)\n", node);
#endif /* DEBUG */

 /*
  * Range check input...
  */

  if (!node || !node->parent)
    return;

 /*
  * Remove from parent...
  */

#if DEBUG > 1
  fprintf(stderr, "    BEFORE: node->parent=%p\n", node->parent);
  if (node->parent)
  {
    fprintf(stderr, "    BEFORE: node->parent->child=%p\n", node->parent->child);
    fprintf(stderr, "    BEFORE: node->parent->last_child=%p\n", node->parent->last_child);
  }
  fprintf(stderr, "    BEFORE: node->child=%p\n", node->child);
  fprintf(stderr, "    BEFORE: node->last_child=%p\n", node->last_child);
  fprintf(stderr, "    BEFORE: node->prev=%p\n", node->prev);
  fprintf(stderr, "    BEFORE: node->next=%p\n", node->next);
#endif /* DEBUG > 1 */

  if (node->prev)
    node->prev->next = node->next;
  else
    node->parent->child = node->next;

  if (node->next)
    node->next->prev = node->prev;
  else
    node->parent->last_child = node->prev;

  node->parent = NULL;
  node->prev   = NULL;
  node->next   = NULL;

#if DEBUG > 1
  fprintf(stderr, "    AFTER: node->parent=%p\n", node->parent);
  if (node->parent)
  {
    fprintf(stderr, "    AFTER: node->parent->child=%p\n", node->parent->child);
    fprintf(stderr, "    AFTER: node->parent->last_child=%p\n", node->parent->last_child);
  }
  fprintf(stderr, "    AFTER: node->child=%p\n", node->child);
  fprintf(stderr, "    AFTER: node->last_child=%p\n", node->last_child);
  fprintf(stderr, "    AFTER: node->prev=%p\n", node->prev);
  fprintf(stderr, "    AFTER: node->next=%p\n", node->next);
#endif /* DEBUG > 1 */
}


/*
 * 'mxmlNewXML()' - Create a new XML document tree.
 *
 * The "version" argument specifies the version number to put in the
 * ?xml element node. If NULL, version 1.0 is assumed.
 *
 * @since Mini-XML 2.3@
 */

mxml_node_t *				/* O - New ?xml node */
mxmlNewXML(const char *version)		/* I - Version number to use */
{
  char	element[1024];			/* Element text */


  snprintf(element, sizeof(element), "?xml version=\"%s\" encoding=\"utf-8\"?",
           version ? version : "1.0");

  return (mxmlNewElement(NULL, element));
}


/*
 * 'mxmlRelease()' - Release a node.
 *
 * When the reference count reaches zero, the node (and any children)
 * is deleted via mxmlDelete().
 *
 * @since Mini-XML 2.3@
 */

int					/* O - New reference count */
mxmlRelease(mxml_node_t *node)		/* I - Node */
{
  if (node)
  {
    if ((-- node->ref_count) <= 0)
    {
      mxmlDelete(node);
      return (0);
    }
    else
      return (node->ref_count);
  }
  else
    return (-1);
}


/*
 * 'mxmlRetain()' - Retain a node.
 *
 * @since Mini-XML 2.3@
 */

int					/* O - New reference count */
mxmlRetain(mxml_node_t *node)		/* I - Node */
{
  if (node)
    return (++ node->ref_count);
  else
    return (-1);
}


/*
 * 'mxml_new()' - Create a new node.
 */

static mxml_node_t *			/* O - New node */
mxml_new(mxml_node_t *parent,		/* I - Parent node */
         mxml_type_t type)		/* I - Node type */
{
  mxml_node_t	*node;			/* New node */


#if DEBUG > 1
  fprintf(stderr, "mxml_new(parent=%p, type=%d)\n", parent, type);
#endif /* DEBUG > 1 */

 /*
  * Allocate memory for the node...
  */

  if ((node = calloc(1, sizeof(mxml_node_t))) == NULL)
  {
#if DEBUG > 1
    fputs("    returning NULL\n", stderr);
#endif /* DEBUG > 1 */

    return (NULL);
  }

#if DEBUG > 1
  fprintf(stderr, "    returning %p\n", node);
#endif /* DEBUG > 1 */

 /*
  * Set the node type...
  */

  node->type      = type;
  node->ref_count = 1;

 /*
  * Add to the parent if present...
  */

  if (parent)
    mxmlAdd(parent, MXML_ADD_AFTER, MXML_ADD_TO_PARENT, node);

 /*
  * Return the new node...
  */

  return (node);
}


/*
 * End of "$Id: mxml-node.c 436 2011-01-22 01:02:05Z mike $".
 */