more standardization

[m6w6/ext-propro] / src / php_propro_api.h

diff --git a/src/php_propro_api.h b/src/php_propro_api.h
new file mode 100644 (file)
index 0000000..a2add4f
--- /dev/null
+++ b/src/php_propro_api.h
@@ -0,0 +1,148 @@
+/*
+    +--------------------------------------------------------------------+
+    | PECL :: propro                                                     |
+    +--------------------------------------------------------------------+
+    | Redistribution and use in source and binary forms, with or without |
+    | modification, are permitted provided that the conditions mentioned |
+    | in the accompanying LICENSE file are met.                          |
+    +--------------------------------------------------------------------+
+    | Copyright (c) 2013 Michael Wallner <mike@php.net>                  |
+    +--------------------------------------------------------------------+
+*/
+
+#ifndef PHP_PROPRO_API_H
+#define PHP_PROPRO_API_H
+
+#include "php_propro.h"
+
+/**
+ * The internal property proxy.
+ *
+ * Container for the object/array holding the proxied property.
+ */
+struct php_property_proxy {
+       /** The container holding the property */
+       zval *container;
+       /** The name of the proxied property */
+       char *member_str;
+       /** The length of the name */
+       size_t member_len;
+};
+typedef struct php_property_proxy php_property_proxy_t;
+
+/**
+ * The userland object.
+ *
+ * Return an object instance of php\\PropertyProxy to make your C-struct
+ * member accessible by reference from PHP userland.
+ *
+ * Example:
+ * ~~~~~~~~~~{.c}
+ * static zval *my_read_prop(zval *object, zval *member, int type, zend_literal *key TSRMLS_DC)
+ * {
+ *     my_object_t *obj = zend_object_store_get_object(object TSRMLS_CC);
+ *     my_prophandler_t *handler;
+ *     zval *return_value, *copy = my_cast(IS_STRING, member);
+ *
+ *     if (SUCCESS == my_get_prophandler(Z_STRVAL_P(copy), Z_STRLEN_P(copy), &handler)) {
+ *         ALLOC_ZVAL(return_value);
+ *         Z_SET_REFCOUNT_P(return_value, 0);
+ *         Z_UNSET_ISREF_P(return_value);
+ *
+ *         if (type == BP_VAR_R) {
+ *             handler->read(obj, return_value TSRMLS_CC);
+ *         } else {
+ *             //
+ *             // This is the interesting part
+ *             //
+ *             php_property_proxy_t *proxy;
+ *             zend_object_value proxy_ov;
+ *             zend_class_entry *proxy_ce;
+ *
+ *             proxy = php_property_proxy_init(object, Z_STRVAL_P(copy), Z_STRLEN_P(copy) TSRMLS_CC);
+ *             proxy_ce = php_property_proxy_get_class_entry();
+ *             proxy_ov = php_property_proxy_object_new_ex(proxy_ce, proxy, NULL TSRMLS_CC);
+ *             RETVAL_OBJVAL(proxy_ov, 0);
+ *         }
+ *     } else {
+ *         zend_object_handlers *oh = zend_get_std_object_handlers();
+ *         return_value = oh->read_property(object, member, type, key TSRMLS_CC);
+ *     }
+ *
+ *     zval_ptr_dtor(&copy);
+ *
+ *     return return_value;
+ * }
+ * ~~~~~~~~~~
+ */
+struct php_property_proxy_object {
+       /** The std zend_object */
+       zend_object zo;
+       /** The object value for easy zval creation */
+       zend_object_value zv;
+       /** The actual property proxy */
+       php_property_proxy_t *proxy;
+       /** A reference to any parent property proxy object */
+       struct php_property_proxy_object *parent;
+};
+typedef struct php_property_proxy_object php_property_proxy_object_t;
+
+/**
+ * Create a property proxy
+ *
+ * The property proxy will forward reads and writes to itself to the
+ * proxied property with name \a member_str of \a container.
+ *
+ * @param container the container holding the property
+ * @param member_str the name of the proxied property
+ * @param member_len the length of the name
+ * @return a new property proxy
+ */
+PHP_PROPRO_API php_property_proxy_t *php_property_proxy_init(zval *container,
+               const char *member_str, size_t member_len TSRMLS_DC);
+
+/**
+ * Destroy and free a property proxy.
+ *
+ * The destruction of the property proxy object calls this.
+ *
+ * @param proxy a pointer to the allocated property proxy
+ */
+PHP_PROPRO_API void php_property_proxy_free(php_property_proxy_t **proxy);
+
+/**
+ * Get the zend_class_entry of php\\PropertyProxy
+ * @return the class entry pointer
+ */
+PHP_PROPRO_API zend_class_entry *php_property_proxy_get_class_entry(void);
+
+/**
+ * Instantiate a new php\\PropertyProxy
+ * @param ce the property proxy or derived class entry
+ * @return the zval object value
+ */
+PHP_PROPRO_API zend_object_value php_property_proxy_object_new(
+               zend_class_entry *ce TSRMLS_DC);
+
+/**
+ * Instantiate a new php\\PropertyProxy with \a proxy
+ * @param ce the property proxy or derived class entry
+ * @param proxy the internal property proxy
+ * @param ptr a pointer to store the resulting property proxy object
+ * @return the zval object value
+ */
+PHP_PROPRO_API zend_object_value php_property_proxy_object_new_ex(
+               zend_class_entry *ce, php_property_proxy_t *proxy,
+               php_property_proxy_object_t **ptr TSRMLS_DC);
+
+#endif /* PHP_PROPRO_API_H */
+
+
+/*
+ * Local variables:
+ * tab-width: 4
+ * c-basic-offset: 4
+ * End:
+ * vim600: noet sw=4 ts=4 fdm=marker
+ * vim<600: noet sw=4 ts=4
+ */