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dis-bench / src /php /php-src /ext /com_dotnet /com_saproxy.c
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/*
+----------------------------------------------------------------------+
| Copyright (c) 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: |
| https://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> |
+----------------------------------------------------------------------+
*/
/* This module implements a SafeArray proxy which is used internally
* by the engine when resolving multi-dimensional array accesses on
* SafeArray types.
* In addition, the proxy is now able to handle properties of COM objects
* that smell like PHP arrays.
* */
#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"
typedef struct {
zend_object std;
/* the object we a proxying for; we hold a refcount to it */
php_com_dotnet_object *obj;
/* how many dimensions we are indirecting to get into this element */
LONG dimensions;
/* this is an array whose size_is(dimensions) */
zval *indices;
} php_com_saproxy;
typedef struct {
zend_object_iterator iter;
zval proxy_obj;
zval data;
php_com_saproxy *proxy;
LONG key;
LONG imin, imax;
LONG *indices;
} php_com_saproxy_iter;
#define SA_FETCH(zv) (php_com_saproxy*)Z_OBJ_P(zv)
zend_object *php_com_saproxy_create_object(zend_class_entry *class_type)
{
php_com_saproxy *intern = emalloc(sizeof(*intern));
memset(intern, 0, sizeof(*intern));
zend_object_std_init(&intern->std, class_type);
return &intern->std;
}
static inline void clone_indices(php_com_saproxy *dest, php_com_saproxy *src, int ndims)
{
int i;
for (i = 0; i < ndims; i++) {
ZVAL_DUP(&dest->indices[i], &src->indices[i]);
}
}
static zval *saproxy_property_read(zend_object *object, zend_string *member, int type, void **cache_slot, zval *rv)
{
ZVAL_NULL(rv);
php_com_throw_exception(E_INVALIDARG, "safearray has no properties");
return rv;
}
static zval *saproxy_property_write(zend_object *object, zend_string *member, zval *value, void **cache_slot)
{
php_com_throw_exception(E_INVALIDARG, "safearray has no properties");
return value;
}
static zval *saproxy_read_dimension(zend_object *object, zval *offset, int type, zval *rv)
{
php_com_saproxy *proxy = (php_com_saproxy*) object;
UINT dims, i;
SAFEARRAY *sa;
LONG ubound, lbound;
HRESULT res;
ZVAL_NULL(rv);
if (V_VT(&proxy->obj->v) == VT_DISPATCH) {
VARIANT v;
zval *args;
/* prop-get using first dimension as the property name,
* all subsequent dimensions and the offset as parameters */
args = safe_emalloc(proxy->dimensions + 1, sizeof(zval), 0);
for (i = 1; i < (UINT) proxy->dimensions; i++) {
args[i-1] = proxy->indices[i];
}
ZVAL_COPY_VALUE(&args[i-1], offset);
if (!try_convert_to_string(&proxy->indices[0])) {
efree(args);
return rv;
}
VariantInit(&v);
res = php_com_do_invoke(proxy->obj, Z_STR(proxy->indices[0]),
DISPATCH_METHOD|DISPATCH_PROPERTYGET, &v,
proxy->dimensions, args, 0);
efree(args);
if (res == SUCCESS) {
php_com_zval_from_variant(rv, &v, proxy->obj->code_page);
VariantClear(&v);
} else if (res == DISP_E_BADPARAMCOUNT) {
/* return another proxy */
php_com_saproxy_create(object, rv, offset);
}
return rv;
} else if (!V_ISARRAY(&proxy->obj->v)) {
php_com_throw_exception(E_INVALIDARG, "invalid read from com proxy object");
return rv;
}
/* the SafeArray case */
/* offset/index must be an integer */
convert_to_long(offset);
sa = V_ARRAY(&proxy->obj->v);
dims = SafeArrayGetDim(sa);
if ((UINT) proxy->dimensions >= dims) {
/* too many dimensions */
php_com_throw_exception(E_INVALIDARG, "too many dimensions!");
return rv;
}
/* bounds check */
SafeArrayGetLBound(sa, proxy->dimensions, &lbound);
SafeArrayGetUBound(sa, proxy->dimensions, &ubound);
if (Z_LVAL_P(offset) < lbound || Z_LVAL_P(offset) > ubound) {
php_com_throw_exception(DISP_E_BADINDEX, "index out of bounds");
return rv;
}
if (dims - 1 == proxy->dimensions) {
LONG *indices;
VARTYPE vt;
VARIANT v;
VariantInit(&v);
/* we can return a real value */
indices = safe_emalloc(dims, sizeof(LONG), 0);
/* copy indices from proxy */
for (i = 0; i < dims; i++) {
convert_to_long(&proxy->indices[i]);
indices[i] = (LONG)Z_LVAL(proxy->indices[i]);
}
/* add user-supplied index */
indices[dims-1] = (LONG)Z_LVAL_P(offset);
/* now fetch the value */
if (FAILED(SafeArrayGetVartype(sa, &vt)) || vt == VT_EMPTY) {
vt = V_VT(&proxy->obj->v) & ~VT_ARRAY;
}
if (vt == VT_VARIANT) {
res = SafeArrayGetElement(sa, indices, &v);
} else {
V_VT(&v) = vt;
res = SafeArrayGetElement(sa, indices, &v.lVal);
}
efree(indices);
if (SUCCEEDED(res)) {
php_com_wrap_variant(rv, &v, proxy->obj->code_page);
} else {
php_com_throw_exception(res, NULL);
}
VariantClear(&v);
} else {
/* return another proxy */
php_com_saproxy_create(object, rv, offset);
}
return rv;
}
static void saproxy_write_dimension(zend_object *object, zval *offset, zval *value)
{
php_com_saproxy *proxy = (php_com_saproxy*) object;
UINT dims, i;
HRESULT res;
VARIANT v;
if (V_VT(&proxy->obj->v) == VT_DISPATCH) {
/* We do a prop-set using the first dimension as the property name,
* all subsequent dimensions and offset as parameters, with value as
* the final value */
zval *args = safe_emalloc(proxy->dimensions + 2, sizeof(zval), 0);
for (i = 1; i < (UINT) proxy->dimensions; i++) {
ZVAL_COPY_VALUE(&args[i-1], &proxy->indices[i]);
}
ZVAL_COPY_VALUE(&args[i-1], offset);
ZVAL_COPY_VALUE(&args[i], value);
if (!try_convert_to_string(&proxy->indices[0])) {
efree(args);
return;
}
VariantInit(&v);
if (SUCCESS == php_com_do_invoke(proxy->obj, Z_STR(proxy->indices[0]),
DISPATCH_PROPERTYPUT, &v, proxy->dimensions + 1,
args, 0)) {
VariantClear(&v);
}
efree(args);
} else if (V_ISARRAY(&proxy->obj->v)) {
LONG *indices;
VARTYPE vt;
dims = SafeArrayGetDim(V_ARRAY(&proxy->obj->v));
indices = safe_emalloc(dims, sizeof(LONG), 0);
/* copy indices from proxy */
for (i = 0; i < dims; i++) {
convert_to_long(&proxy->indices[i]);
indices[i] = (LONG)Z_LVAL(proxy->indices[i]);
}
/* add user-supplied index */
convert_to_long(offset);
indices[dims-1] = (LONG)Z_LVAL_P(offset);
if (FAILED(SafeArrayGetVartype(V_ARRAY(&proxy->obj->v), &vt)) || vt == VT_EMPTY) {
vt = V_VT(&proxy->obj->v) & ~VT_ARRAY;
}
VariantInit(&v);
php_com_variant_from_zval(&v, value, proxy->obj->code_page);
if (V_VT(&v) != vt) {
VariantChangeType(&v, &v, 0, vt);
}
if (vt == VT_VARIANT) {
res = SafeArrayPutElement(V_ARRAY(&proxy->obj->v), indices, &v);
} else {
res = SafeArrayPutElement(V_ARRAY(&proxy->obj->v), indices, &v.lVal);
}
efree(indices);
VariantClear(&v);
if (FAILED(res)) {
php_com_throw_exception(res, NULL);
}
} else {
php_com_throw_exception(E_NOTIMPL, "invalid write to com proxy object");
}
}
static int saproxy_property_exists(zend_object *object, zend_string *member, int check_empty, void **cache_slot)
{
/* no properties */
return 0;
}
static int saproxy_dimension_exists(zend_object *object, zval *member, int check_empty)
{
/* TODO Add support */
zend_throw_error(NULL, "Cannot check dimension on a COM object");
return 0;
}
static void saproxy_property_delete(zend_object *object, zend_string *member, void **cache_slot)
{
zend_throw_error(NULL, "Cannot delete properties from a COM object");
}
static void saproxy_dimension_delete(zend_object *object, zval *offset)
{
zend_throw_error(NULL, "Cannot delete dimension from a COM object");
}
static HashTable *saproxy_properties_get(zend_object *object)
{
/* no properties */
return NULL;
}
static zend_function *saproxy_method_get(zend_object **object, zend_string *name, const zval *key)
{
/* no methods */
return NULL;
}
static zend_function *saproxy_constructor_get(zend_object *object)
{
zend_throw_error(NULL, "Cannot directly construct com_safeproxy_array; it is for internal usage only");
return NULL;
}
static zend_string* saproxy_class_name_get(const zend_object *object)
{
return zend_string_copy(php_com_saproxy_class_entry->name);
}
static int saproxy_objects_compare(zval *object1, zval *object2)
{
ZEND_COMPARE_OBJECTS_FALLBACK(object1, object2);
return -1;
}
static zend_result saproxy_object_cast(zend_object *readobj, zval *writeobj, int type)
{
return FAILURE;
}
static zend_result saproxy_count_elements(zend_object *object, zend_long *count)
{
php_com_saproxy *proxy = (php_com_saproxy*) object;
LONG ubound, lbound;
if (!V_ISARRAY(&proxy->obj->v)) {
return FAILURE;
}
SafeArrayGetLBound(V_ARRAY(&proxy->obj->v), proxy->dimensions, &lbound);
SafeArrayGetUBound(V_ARRAY(&proxy->obj->v), proxy->dimensions, &ubound);
*count = ubound - lbound + 1;
return SUCCESS;
}
static void saproxy_free_storage(zend_object *object)
{
php_com_saproxy *proxy = (php_com_saproxy *)object;
//??? int i;
//???
//??? for (i = 0; i < proxy->dimensions; i++) {
//??? if (proxy->indices) {
//??? FREE_ZVAL(proxy->indices[i]);
//??? }
//??? }
if (proxy->obj != NULL) {
OBJ_RELEASE(&proxy->obj->zo);
}
zend_object_std_dtor(object);
efree(proxy->indices);
}
static zend_object* saproxy_clone(zend_object *object)
{
php_com_saproxy *proxy = (php_com_saproxy *) object;
php_com_saproxy *cloneproxy;
cloneproxy = emalloc(sizeof(*cloneproxy));
memcpy(cloneproxy, proxy, sizeof(*cloneproxy));
GC_ADDREF(&cloneproxy->obj->zo);
cloneproxy->indices = safe_emalloc(cloneproxy->dimensions, sizeof(zval), 0);
clone_indices(cloneproxy, proxy, proxy->dimensions);
return &cloneproxy->std;
}
zend_object_handlers php_com_saproxy_handlers = {
0,
saproxy_free_storage,
zend_objects_destroy_object,
saproxy_clone,
saproxy_property_read,
saproxy_property_write,
saproxy_read_dimension,
saproxy_write_dimension,
NULL,
saproxy_property_exists,
saproxy_property_delete,
saproxy_dimension_exists,
saproxy_dimension_delete,
saproxy_properties_get,
saproxy_method_get,
saproxy_constructor_get,
saproxy_class_name_get,
saproxy_object_cast,
saproxy_count_elements,
NULL, /* get_debug_info */
NULL, /* get_closure */
NULL, /* get_gc */
NULL, /* do_operation */
saproxy_objects_compare, /* compare */
NULL, /* get_properties_for */
};
void php_com_saproxy_create(zend_object *com_object, zval *proxy_out, zval *index)
{
php_com_saproxy *proxy, *rel = NULL;
proxy = ecalloc(1, sizeof(*proxy));
proxy->dimensions = 1;
if (com_object->ce == php_com_saproxy_class_entry) {
rel = (php_com_saproxy*) com_object;
proxy->obj = rel->obj;
proxy->dimensions += rel->dimensions;
} else {
proxy->obj = (php_com_dotnet_object*) com_object;
}
GC_ADDREF(&proxy->obj->zo);
proxy->indices = safe_emalloc(proxy->dimensions, sizeof(zval), 0);
if (rel) {
clone_indices(proxy, rel, rel->dimensions);
}
ZVAL_DUP(&proxy->indices[proxy->dimensions-1], index);
zend_object_std_init(&proxy->std, php_com_saproxy_class_entry);
ZVAL_OBJ(proxy_out, &proxy->std);
}
/* iterator */
static void saproxy_iter_dtor(zend_object_iterator *iter)
{
php_com_saproxy_iter *I = (php_com_saproxy_iter*)Z_PTR(iter->data);
zval_ptr_dtor(&I->proxy_obj);
efree(I->indices);
efree(I);
}
static zend_result saproxy_iter_valid(zend_object_iterator *iter)
{
php_com_saproxy_iter *I = (php_com_saproxy_iter*)Z_PTR(iter->data);
return (I->key < I->imax) ? SUCCESS : FAILURE;
}
static zval* saproxy_iter_get_data(zend_object_iterator *iter)
{
php_com_saproxy_iter *I = (php_com_saproxy_iter*)Z_PTR(iter->data);
VARIANT v;
VARTYPE vt;
SAFEARRAY *sa;
I->indices[I->proxy->dimensions-1] = I->key;
sa = V_ARRAY(&I->proxy->obj->v);
if (FAILED(SafeArrayGetVartype(sa, &vt)) || vt == VT_EMPTY) {
vt = V_VT(&I->proxy->obj->v) & ~VT_ARRAY;
}
VariantInit(&v);
if (vt == VT_VARIANT) {
SafeArrayGetElement(sa, I->indices, &v);
} else {
V_VT(&v) = vt;
SafeArrayGetElement(sa, I->indices, &v.lVal);
}
ZVAL_NULL(&I->data);
php_com_wrap_variant(&I->data, &v, I->proxy->obj->code_page);
VariantClear(&v);
return &I->data;
}
static void saproxy_iter_get_key(zend_object_iterator *iter, zval *key)
{
php_com_saproxy_iter *I = (php_com_saproxy_iter*)Z_PTR(iter->data);
if (I->key == -1) {
ZVAL_NULL(key);
} else {
ZVAL_LONG(key, I->key);
}
}
static void saproxy_iter_move_forwards(zend_object_iterator *iter)
{
php_com_saproxy_iter *I = (php_com_saproxy_iter*)Z_PTR(iter->data);
if (++I->key >= I->imax) {
I->key = -1;
}
}
static const zend_object_iterator_funcs saproxy_iter_funcs = {
saproxy_iter_dtor,
saproxy_iter_valid,
saproxy_iter_get_data,
saproxy_iter_get_key,
saproxy_iter_move_forwards,
NULL,
NULL, /* get_gc */
};
zend_object_iterator *php_com_saproxy_iter_get(zend_class_entry *ce, zval *object, int by_ref)
{
php_com_saproxy *proxy = SA_FETCH(object);
php_com_saproxy_iter *I;
int i;
if (by_ref) {
zend_throw_error(NULL, "An iterator cannot be used with foreach by reference");
return NULL;
}
I = ecalloc(1, sizeof(*I));
I->iter.funcs = &saproxy_iter_funcs;
Z_PTR(I->iter.data) = I;
I->proxy = proxy;
Z_ADDREF_P(object);
ZVAL_OBJ(&I->proxy_obj, Z_OBJ_P(object));
I->indices = safe_emalloc(proxy->dimensions + 1, sizeof(LONG), 0);
for (i = 0; i < proxy->dimensions; i++) {
convert_to_long(&proxy->indices[i]);
I->indices[i] = (LONG)Z_LVAL(proxy->indices[i]);
}
SafeArrayGetLBound(V_ARRAY(&proxy->obj->v), proxy->dimensions, &I->imin);
SafeArrayGetUBound(V_ARRAY(&proxy->obj->v), proxy->dimensions, &I->imax);
I->key = I->imin;
return &I->iter;
}