aboutsummaryrefslogtreecommitdiff
path: root/libXt/src/Varargs.c
blob: 37d3c64dbe983375132395a40c7a99a443c0a4c0 (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
/* $Xorg: Varargs.c,v 1.4 2001/02/09 02:03:59 xorgcvs Exp $ */

/*

Copyright 1985, 1986, 1987, 1988, 1989, 1994, 1998  The Open Group

Permission to use, copy, modify, distribute, and sell this software and its
documentation for any purpose is hereby granted without fee, provided that
the above copyright notice appear in all copies and that both that
copyright notice and this permission notice appear in supporting
documentation.

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Except as contained in this notice, the name of The Open Group shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from The Open Group.

*/
/* $XFree86: xc/lib/Xt/Varargs.c,v 3.10 2001/12/14 19:56:32 dawes Exp $ */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "IntrinsicI.h"
#include "VarargsI.h"
#include "StringDefs.h"

static String XtNxtConvertVarToArgList = "xtConvertVarToArgList";

/*
 *    Given a nested list, _XtCountNestedList() returns counts of the
 *    total number of attribute-value pairs and the count of those
 *    attributes that are typed. The list is counted recursively.
 */
static  void
_XtCountNestedList(
    XtTypedArgList  avlist,
    int             *total_count,
    int             *typed_count)
{
    for (; avlist->name != NULL; avlist++) {
        if (strcmp(avlist->name, XtVaNestedList) == 0) {
            _XtCountNestedList((XtTypedArgList)avlist->value, total_count,
                	       typed_count);
        } else {
            if (avlist->type != NULL) {
                ++(*typed_count);
            }
            ++(*total_count);
        }
    }
}


/*
 *    Given a variable length attribute-value list, _XtCountVaList()
 *    returns counts of the total number of attribute-value pairs,
 *    and the count of the number of those attributes that are typed.
 *    The list is counted recursively.
 */
void
_XtCountVaList(va_list var, int* total_count, int* typed_count)
{
    String          attr;

    *total_count = 0;
    *typed_count = 0;

    for(attr = va_arg(var, String) ; attr != NULL;
                        attr = va_arg(var, String)) {
        if (strcmp(attr, XtVaTypedArg) == 0) {
            (void)va_arg(var, String);
            (void)va_arg(var, String);
            (void)va_arg(var, XtArgVal);
            (void)va_arg(var, int);
            ++(*total_count);
            ++(*typed_count);
        } else if (strcmp(attr, XtVaNestedList) == 0) {
            _XtCountNestedList(va_arg(var, XtTypedArgList), total_count,
                typed_count);
        } else {
            (void)va_arg(var, XtArgVal);
            ++(*total_count);
	}
    }
}


/*
 *   Given a variable length attribute-value list, XtVaCreateArgsList()
 *   constructs an attribute-value list of type XtTypedArgList and
 *   returns the list.
 */
XtVarArgsList
XtVaCreateArgsList(XtPointer unused, ...)
{
    va_list var;
    XtTypedArgList  avlist;
    int		    count = 0;
    String	    attr;

    /*
     * Count the number of attribute-value pairs in the list.
     * Note: The count is required only to allocate enough space to store
     * the list. Therefore nested lists are not counted recursively.
     */
    va_start(var,unused);
    for(attr = va_arg(var, String) ; attr != NULL;
                        attr = va_arg(var, String)) {
        ++count;
        if (strcmp(attr, XtVaTypedArg) == 0) {
            (void)va_arg(var, String);
            (void)va_arg(var, String);
            (void)va_arg(var, XtArgVal);
            (void)va_arg(var, int);
        } else {
            (void)va_arg(var, XtArgVal);
        }
    }
    va_end(var);

    va_start(var,unused);
    avlist = _XtVaCreateTypedArgList(var, count);
    va_end(var);
    return (XtVarArgsList)avlist;
}


XtTypedArgList _XtVaCreateTypedArgList(va_list var, register int count)
{
    String	    attr;
    XtTypedArgList  avlist;

    avlist = (XtTypedArgList)
		__XtCalloc((int)count + 1, (unsigned)sizeof(XtTypedArg));

    for(attr = va_arg(var, String), count = 0; attr != NULL;
		attr = va_arg(var, String)) {
	if (strcmp(attr, XtVaTypedArg) == 0) {
	    avlist[count].name = va_arg(var, String);
	    avlist[count].type = va_arg(var, String);
	    avlist[count].value = va_arg(var, XtArgVal);
	    avlist[count].size = va_arg(var, int);
	} else {
	    avlist[count].name = attr;
	    avlist[count].type = NULL;
	    avlist[count].value = va_arg(var, XtArgVal);
	}
	++count;
    }
    avlist[count].name = NULL;

    return avlist;
}


/*
 *    TypedArgToArg() invokes a resource converter to convert the
 *    passed typed arg into a name/value pair and stores the name/value
 *    pair in the passed Arg structure.  If memory is allocated for the
 *    converted value, the address is returned in the value field of
 *    memory_return; otherwise that field is NULL.  The function returns
 *    1 if the conversion succeeded and 0 if the conversion failed.
 */
static int
TypedArgToArg(
    Widget              widget,
    XtTypedArgList      typed_arg,
    ArgList             arg_return,
    XtResourceList      resources,
    Cardinal            num_resources,
    ArgList		memory_return)
{
    String              to_type = NULL;
    XrmValue            from_val, to_val;


    if (widget == NULL) {
        XtAppWarningMsg(XtWidgetToApplicationContext(widget),
            "nullWidget", XtNxtConvertVarToArgList, XtCXtToolkitError,
	    "XtVaTypedArg conversion needs non-NULL widget handle",
            (String *)NULL, (Cardinal *)NULL);
        return(0);
    }

    /* again we assume that the XtResourceList is un-compiled */

    for (; num_resources--; resources++)
	if (strcmp(typed_arg->name, resources->resource_name) == 0) {
	    to_type = resources->resource_type;
	    break;
	}

    if (to_type == NULL) {
        XtAppWarningMsg(XtWidgetToApplicationContext(widget),
            "unknownType", XtNxtConvertVarToArgList, XtCXtToolkitError,
            "Unable to find type of resource for conversion",
            (String *)NULL, (Cardinal *)NULL);
        return(0);
    }

    to_val.addr = NULL;
    from_val.size = typed_arg->size;
    if ((strcmp(typed_arg->type, XtRString) == 0) ||
            ((unsigned) typed_arg->size > sizeof(XtArgVal))) {
        from_val.addr = (XPointer)typed_arg->value;
    } else {
            from_val.addr = (XPointer)&typed_arg->value;
    }

    LOCK_PROCESS;
    XtConvertAndStore(widget, typed_arg->type, &from_val, to_type, &to_val);

    if (to_val.addr == NULL) {
	UNLOCK_PROCESS;
        XtAppWarningMsg(XtWidgetToApplicationContext(widget),
            "conversionFailed", XtNxtConvertVarToArgList, XtCXtToolkitError,
            "Type conversion failed", (String *)NULL, (Cardinal *)NULL);
        return(0);
    }

    arg_return->name = typed_arg->name;
    memory_return->value = (XtArgVal) NULL;

    if (strcmp(to_type, XtRString) == 0) {
	arg_return->value = (XtArgVal) to_val.addr;
    }
    else {
	if (to_val.size == sizeof(long))
	    arg_return->value = (XtArgVal) *(long *)to_val.addr;
	else if (to_val.size == sizeof(short))
	    arg_return->value = (XtArgVal) *(short *)to_val.addr;
	else if (to_val.size == sizeof(char))
	    arg_return->value = (XtArgVal) *(char *)to_val.addr;
	else if (to_val.size == sizeof(XtArgVal))
	    arg_return->value = *(XtArgVal *)to_val.addr;
	else if (to_val.size > sizeof(XtArgVal)) {
	    arg_return->value = (XtArgVal) __XtMalloc(to_val.size);
	    memory_return->value = (XtArgVal)
		memcpy((void *)arg_return->value, to_val.addr, to_val.size);
	}
    }
    UNLOCK_PROCESS;

    return(1);
}


/*
 *    NestedArgtoArg() converts the passed nested list into
 *    an ArgList/count.
 */
static int
NestedArgtoArg(
    Widget              widget,
    XtTypedArgList      avlist,
    ArgList             args,
    XtResourceList      resources,
    Cardinal            num_resources,
    ArgList		memory_return)
{
    int         count = 0;

    for (; avlist->name != NULL; avlist++) {
        if (avlist->type != NULL) {
            /* If widget is NULL, the typed arg is ignored */
            if (widget != NULL) {
                /* this is a typed arg */
                count += TypedArgToArg(widget, avlist, (args+count),
					  resources, num_resources,
					  (memory_return+count));
            }
        } else if (strcmp(avlist->name, XtVaNestedList) == 0) {
            count += NestedArgtoArg(widget, (XtTypedArgList)avlist->value,
				       (args+count), resources, num_resources,
				       (memory_return+count));
        } else {
            (args+count)->name = avlist->name;
            (args+count)->value = avlist->value;
            ++count;
        }
    }

    return(count);
}

/*
 * Free memory allocated through _XtVaToArgList.  The actual args array
 * size is expected to be total_count * 2, where total_count is the number
 * of elements needed for resource representations.  The lower half of the
 * array contains pairs of resource names and values as usual.  For each
 * element [n] in the lower half of the array, the value field of the
 * corresponding element [n + total_count] in the upper half of the array
 * has been pressed into service in order to note whether the resource value
 * is a pointer to memory that was allocated in TypedArgToArg.  In the
 * upper half, if the value field is not NULL, it contains the address of
 * memory which should now be freed.  That memory could have been allocated
 * only as a result of the conversion of typed arguments.  Therefore, if
 * there were no typed arguments in the original varargs, there is no need
 * to examine the upper half of the array.  In the choice of data structure
 * to make this representation, priority was given to the wish to retrofit
 * the release of memory around the existing signature of _XtVaToArgList.
 */
void
_XtFreeArgList(
    ArgList	args,	     /* as returned by _XtVaToArgList */
    int		total_count, /*  argument count returned by _XtCountVaList */
    int 	typed_count) /* typed arg count returned by _XtCountVaList */
{
    ArgList p;

    if (args) {
	if (typed_count)
	    for (p = args + total_count; total_count--; ++p) {
		if (p->value) XtFree((char *)p->value);
	    }
	XtFree((char *)args);
    }
}


static void GetResources(Widget widget, XtResourceList *res_list,
			 Cardinal *number);


/*
 *    Given a variable argument list, _XtVaToArgList() returns the
 *    equivalent ArgList and count. _XtVaToArgList() handles nested
 *    lists and typed arguments.  If typed arguments are present, the
 *    ArgList should be freed with _XtFreeArgList.
 */
void
_XtVaToArgList(
    Widget		widget,
    va_list     	var,
    int			max_count,
    ArgList		*args_return,
    Cardinal		*num_args_return)
{
    String		attr;
    int			count;
    ArgList		args = (ArgList)NULL;
    XtTypedArg		typed_arg;
    XtResourceList	resources = (XtResourceList)NULL;
    Cardinal		num_resources;
    Boolean		fetched_resource_list = False;

    if (max_count  == 0) {
	*num_args_return = 0;
	*args_return = (ArgList)NULL;
	return;
    }

    args = (ArgList)__XtMalloc((unsigned)(max_count * 2 * sizeof(Arg)));
    for (count = max_count * 2; --count >= 0; )
	args[count].value = (XtArgVal) NULL;
    count = 0;

    for(attr = va_arg(var, String) ; attr != NULL;
			attr = va_arg(var, String)) {
	if (strcmp(attr, XtVaTypedArg) == 0) {
	    typed_arg.name = va_arg(var, String);
	    typed_arg.type = va_arg(var, String);
	    typed_arg.value = va_arg(var, XtArgVal);
	    typed_arg.size = va_arg(var, int);

	    /* if widget is NULL, typed args are ignored */
	    if (widget != NULL) {
		if (!fetched_resource_list) {
		    GetResources(widget, &resources, &num_resources);
		    fetched_resource_list = True;
		}
		count += TypedArgToArg(widget, &typed_arg, &args[count],
					  resources, num_resources,
					  &args[max_count + count]);
	    }
	} else if (strcmp(attr, XtVaNestedList) == 0) {
	    if (widget != NULL) {
		if (!fetched_resource_list) {
		    GetResources(widget, &resources, &num_resources);
		    fetched_resource_list = True;
		}
	    }

	    count += NestedArgtoArg(widget, va_arg(var, XtTypedArgList),
				       &args[count], resources, num_resources,
				       &args[max_count + count]);
	} else {
	    args[count].name = attr;
	    args[count].value = va_arg(var, XtArgVal);
	    count ++;
	}
    }

    if (resources != NULL)
	XtFree((XtPointer)resources);

    *num_args_return = (Cardinal)count;
    *args_return = (ArgList)args;
}

/*	Function Name: GetResources
 *	Description: Retreives the normal and constraint resources
 *                   for this widget.
 *	Arguments: widget - the widget.
 * RETURNED        res_list - the list of resource for this widget
 * RETURNED        number - the number of resources in the above list.
 *	Returns: none
 */

static void
GetResources(
    Widget widget,
    XtResourceList * res_list,
    Cardinal * number)
{
    Widget parent = XtParent(widget);

    XtInitializeWidgetClass(XtClass(widget));
    XtGetResourceList(XtClass(widget), res_list, number);

    if (!XtIsShell(widget) && parent && XtIsConstraint(parent)) {
	XtResourceList res, constraint, cons_top;
	Cardinal num_constraint, temp;

	XtGetConstraintResourceList(XtClass(parent), &constraint,
				    &num_constraint);

	cons_top = constraint;
	*res_list = (XtResourceList) XtRealloc((char*)*res_list,
					       ((*number + num_constraint) *
						sizeof(XtResource)));

	for (temp= num_constraint, res= *res_list + *number; temp != 0; temp--)
	    *res++ = *constraint++;

	*number += num_constraint;
	XtFree( (XtPointer) cons_top);
    }
}

static int NestedArgtoTypedArg(
    XtTypedArgList      args,
    XtTypedArgList      avlist)
{
    int         count = 0;

    for (; avlist->name != NULL; avlist++) {
        if (avlist->type != NULL) {
            (args+count)->name = avlist->name;
            (args+count)->type = avlist->type;
            (args+count)->size = avlist->size;
            (args+count)->value = avlist->value;
            ++count;
        } else if(strcmp(avlist->name, XtVaNestedList) == 0) {
            count += NestedArgtoTypedArg((args+count),
                            (XtTypedArgList)avlist->value);
        } else {
            (args+count)->name = avlist->name;
	    (args+count)->type = NULL;
            (args+count)->value = avlist->value;
            ++count;
        }
    }
    return(count);
}


/*
 *    Given a variable argument list, _XtVaToTypedArgList() returns
 *    the equivalent TypedArgList. _XtVaToTypedArgList() handles nested
 *    lists.
 *    Note: _XtVaToTypedArgList() does not do type conversions.
 */
void
_XtVaToTypedArgList(
    va_list             var,
    int			max_count,
    XtTypedArgList   	*args_return,
    Cardinal            *num_args_return)
{
    XtTypedArgList	args = NULL;
    String              attr;
    int			count;

    args = (XtTypedArgList)
	__XtMalloc((unsigned)(max_count * sizeof(XtTypedArg)));

    for(attr = va_arg(var, String), count = 0 ; attr != NULL;
		    attr = va_arg(var, String)) {
        if (strcmp(attr, XtVaTypedArg) == 0) {
	    args[count].name = va_arg(var, String);
	    args[count].type = va_arg(var, String);
	    args[count].value = va_arg(var, XtArgVal);
	    args[count].size = va_arg(var, int);
	    ++count;
	} else if (strcmp(attr, XtVaNestedList) == 0) {
   	    count += NestedArgtoTypedArg(&args[count], 
			va_arg(var, XtTypedArgList));
	} else {
	    args[count].name = attr;
	    args[count].type = NULL;
	    args[count].value = va_arg(var, XtArgVal);
	    ++count;
	}
    }

    *args_return = args;
    *num_args_return = count;
}