summaryrefslogtreecommitdiff
path: root/ext/com_dotnet/com_iterator.c
blob: b2754d523c3c956113998b0377a2e1615a747639 (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
/*
   +----------------------------------------------------------------------+
   | PHP Version 5                                                        |
   +----------------------------------------------------------------------+
   | Copyright (c) 1997-2010 The PHP Group                                |
   +----------------------------------------------------------------------+
   | This source file is subject to version 3.01 of the PHP license,      |
   | that is bundled with this package in the file LICENSE, and is        |
   | available through the world-wide-web at the following url:           |
   | http://www.php.net/license/3_01.txt                                  |
   | If you did not receive a copy of the PHP license and are unable to   |
   | obtain it through the world-wide-web, please send a note to          |
   | license@php.net so we can mail you a copy immediately.               |
   +----------------------------------------------------------------------+
   | Author: Wez Furlong <wez@thebrainroom.com>                           |
   +----------------------------------------------------------------------+
 */

/* $Id$ */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "php.h"
#include "php_ini.h"
#include "ext/standard/info.h"
#include "php_com_dotnet.h"
#include "php_com_dotnet_internal.h"
#include "Zend/zend_exceptions.h"

struct php_com_iterator {
	zend_object_iterator iter;
	IEnumVARIANT *ev;
	ulong key;
	VARIANT v; /* cached element */
	int code_page;
	VARIANT safe_array;
	VARTYPE sa_type;
	LONG sa_max;
	zval *zdata;
};

static void com_iter_dtor(zend_object_iterator *iter TSRMLS_DC)
{
	struct php_com_iterator *I = (struct php_com_iterator*)iter->data;
	
	if (I->ev) {
		IEnumVARIANT_Release(I->ev);
	}
	VariantClear(&I->v);
	VariantClear(&I->safe_array);
	if (I->zdata) {
		zval_ptr_dtor((zval**)&I->zdata);
	}
	efree(I);
}

static int com_iter_valid(zend_object_iterator *iter TSRMLS_DC)
{
	struct php_com_iterator *I = (struct php_com_iterator*)iter->data;

	if (I->zdata) {
		return SUCCESS;
	}

	return FAILURE;
}

static void com_iter_get_data(zend_object_iterator *iter, zval ***data TSRMLS_DC)
{
	struct php_com_iterator *I = (struct php_com_iterator*)iter->data;

	*data = &I->zdata;
}

static int com_iter_get_key(zend_object_iterator *iter, char **str_key, uint *str_key_len,
	ulong *int_key TSRMLS_DC)
{
	struct php_com_iterator *I = (struct php_com_iterator*)iter->data;

	if (I->key == (ulong)-1) {
		return HASH_KEY_NON_EXISTANT;
	}
	*int_key = I->key;
	return HASH_KEY_IS_LONG;
}

static int com_iter_move_forwards(zend_object_iterator *iter TSRMLS_DC)
{
	struct php_com_iterator *I = (struct php_com_iterator*)iter->data;
	unsigned long n_fetched;
	zval *ptr;

	/* release current cached element */
	VariantClear(&I->v);

	if (I->zdata) {
		zval_ptr_dtor((zval**)&I->zdata);
		I->zdata = NULL;
	}

	if (I->ev) {
		/* Get the next element */
		if (SUCCEEDED(IEnumVARIANT_Next(I->ev, 1, &I->v, &n_fetched)) && n_fetched > 0) {
			I->key++;
		} else {
			/* indicate that there are no more items */
			I->key = (ulong)-1;
			return FAILURE;
		}
	} else {
		/* safe array */
		if (I->key >= (ULONG) I->sa_max) {
			I->key = (ulong)-1;
			return FAILURE;
		}
		I->key++;
		if (php_com_safearray_get_elem(&I->safe_array, &I->v, (LONG)I->key TSRMLS_CC) == 0) {
			I->key = (ulong)-1;
			return FAILURE;
		}
	}

	MAKE_STD_ZVAL(ptr);
	php_com_zval_from_variant(ptr, &I->v, I->code_page TSRMLS_CC);
	/* php_com_wrap_variant(ptr, &I->v, I->code_page TSRMLS_CC); */
	I->zdata = ptr;
	return SUCCESS;
}


static zend_object_iterator_funcs com_iter_funcs = {
	com_iter_dtor,
	com_iter_valid,
	com_iter_get_data,
	com_iter_get_key,
	com_iter_move_forwards,
	NULL
};

zend_object_iterator *php_com_iter_get(zend_class_entry *ce, zval *object, int by_ref TSRMLS_DC)
{
	php_com_dotnet_object *obj;
	struct php_com_iterator *I;
	IEnumVARIANT *iev = NULL;
	DISPPARAMS dp;
	VARIANT v;
	unsigned long n_fetched;
	zval *ptr;

	if (by_ref) {
		zend_error(E_ERROR, "An iterator cannot be used with foreach by reference");
	}

	obj = CDNO_FETCH(object);

	if (V_VT(&obj->v) != VT_DISPATCH && !V_ISARRAY(&obj->v)) {
		php_error_docref(NULL TSRMLS_CC, E_WARNING, "variant is not an object or array VT=%d", V_VT(&obj->v));
		return NULL;
	}

	memset(&dp, 0, sizeof(dp));
	VariantInit(&v);	

	I = (struct php_com_iterator*)ecalloc(1, sizeof(*I));
	I->iter.funcs = &com_iter_funcs;
	I->iter.data = I;
	I->code_page = obj->code_page;
	I->zdata = NULL;
	VariantInit(&I->safe_array);
	VariantInit(&I->v);

	if (V_ISARRAY(&obj->v)) {
		LONG bound;
		UINT dims;
	
		dims = SafeArrayGetDim(V_ARRAY(&obj->v));

		if (dims != 1) {
			php_error_docref(NULL TSRMLS_CC, E_WARNING,
				   "Can only handle single dimension variant arrays (this array has %d)", dims);
			goto fail;
		}
		
		/* same semantics as foreach on a PHP array;
		 * make a copy and enumerate that copy */
		VariantCopy(&I->safe_array, &obj->v);

		/* determine the key value for the array */
		SafeArrayGetLBound(V_ARRAY(&I->safe_array), 1, &bound);
		SafeArrayGetUBound(V_ARRAY(&I->safe_array), 1, &I->sa_max);

		/* pre-fetch the element */
		if (php_com_safearray_get_elem(&I->safe_array, &I->v, bound TSRMLS_CC)) {
			I->key = bound;
			MAKE_STD_ZVAL(ptr);
			php_com_zval_from_variant(ptr, &I->v, I->code_page TSRMLS_CC);
			I->zdata = ptr;
		} else {
			I->key = (ulong)-1;
		}
		
	} else {
		/* can we enumerate it? */
		if (FAILED(IDispatch_Invoke(V_DISPATCH(&obj->v), DISPID_NEWENUM,
						&IID_NULL, LOCALE_SYSTEM_DEFAULT, DISPATCH_METHOD|DISPATCH_PROPERTYGET,
						&dp, &v, NULL, NULL))) {
			goto fail;
		}

		/* get something useful out of it */
		if (V_VT(&v) == VT_UNKNOWN) {
			IUnknown_QueryInterface(V_UNKNOWN(&v), &IID_IEnumVARIANT, (void**)&iev);
		} else if (V_VT(&v) == VT_DISPATCH) {
			IDispatch_QueryInterface(V_DISPATCH(&v), &IID_IEnumVARIANT, (void**)&iev);
		}

		VariantClear(&v);

		if (iev == NULL) {
			goto fail;
		}
	
		I->ev = iev;

		/* Get the first element now */
		if (SUCCEEDED(IEnumVARIANT_Next(I->ev, 1, &I->v, &n_fetched)) && n_fetched > 0) {
			/* indicate that we have element 0 */
			I->key = 0;
			MAKE_STD_ZVAL(ptr);
			php_com_zval_from_variant(ptr, &I->v, I->code_page TSRMLS_CC);
			I->zdata = ptr;
		} else {
			/* indicate that there are no more items */
			I->key = (ulong)-1;
		}
	}

	return &I->iter;

fail:
	if (I) {
		VariantClear(&I->safe_array);
		VariantClear(&I->v);
		efree(I);
	}
	return NULL;
}