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/**
* Callable.h
*
* Object represents a callable function or method that is defined with the CPP
* API.
*
* @author Emiel Bruijntjes <emiel.bruijntjes@copernica.com>
* @copyright 2013 Copernica BV
*/
/**
* Set up namespace
*/
namespace Php {
/**
* Class definition
*/
class Callable
{
public:
/**
* Constructor
* @param name Function or method name
* @param arguments Information about the arguments
*/
Callable(const char *name, const Arguments &arguments = {}) : _ptr(this, name)
{
// construct vector for arguments
_argc = arguments.size();
_argv = new zend_arg_info[_argc+1];
// the first record is initialized with information about the function,
// so we skip that here
int i=1;
// loop through the arguments
for (auto it = arguments.begin(); it != arguments.end(); it++)
{
// increment counter with number of required parameters
if (it->required()) _required++;
// fill the arg info
fill(&_argv[i++], *it);
}
}
/**
* Copy constructor
* @param that
*/
Callable(const Callable &that) :
_ptr(that._ptr),
_return(that._return),
_required(that._required),
_argc(that._argc),
_argv(nullptr) {}
/**
* Move constructor
* @param that
*/
Callable(Callable &&that) :
_ptr(std::move(that._ptr)),
_return(that._return),
_required(that._required),
_argc(that._argc),
_argv(that._argv)
{
// invalidate other object
that._argv = nullptr;
}
/**
* Destructor
*/
virtual ~Callable()
{
if (_argv) delete[] _argv;
}
/**
* Method that gets called every time the function is executed
* @param params The parameters that were passed
* @return Variable Return value
*/
virtual Value invoke(Parameters ¶ms) = 0;
/**
* Fill a function entry
* @param entry Entry to be filled
* @param ns Active namespace
* @param classname Optional class name
* @param flags Access flags
*/
void initialize(zend_function_entry *entry, const char *classname = nullptr, int flags = 0) const;
/**
* Fill function info
* @param info Info object to be filled
* @param ns Active namespace
* @param classname Optional class name
*/
void initialize(zend_arg_info *info, const char *classname = nullptr) const;
protected:
/**
* Hidden pointer to the name and the function
* @var HiddenPointer
*/
HiddenPointer<Callable> _ptr;
/**
* Suggestion for the return type
* @var Type
*/
Type _return = Type::Null;
/**
* Required number of arguments
* @var integer
*/
int _required = 0;
/**
* Total number of arguments
* @var integer
*/
int _argc = 0;
/**
* The arguments
* @var zend_arg_info[]
*/
zend_arg_info *_argv = nullptr;
/**
* Private helper method to fill an argument object
* @param info object from the zend engine
* @param arg original object
*/
void fill(zend_arg_info *info, const Argument &arg) const
{
// fill members
info->name = arg.name();
info->name_len = ::strlen(arg.name());
#if PHP_VERSION_ID >= 50400
// since php 5.4 there is a type-hint, but we only support arrays, objects and callables
switch (arg.type()) {
case Type::Array: info->type_hint = IS_ARRAY; break;
case Type::Callable: info->type_hint = IS_CALLABLE; break;
case Type::Object: info->type_hint = IS_OBJECT; break;
default: info->type_hint = IS_NULL; break;
}
# if PHP_VERSION_ID >= 50600
// from PHP 5.6 and onwards, an is_variadic property can be set, this
// specifies whether this argument is the first argument that specifies
// the type for a variable length list of arguments. For now we only
// support methods and functions with a fixed number of arguments.
info->is_variadic = false;
# endif
#else
// php 5.3 code
info->array_type_hint = arg.type() == Type::Array;
info->return_reference = false;
info->required_num_args = 0; // @todo is this correct?
#endif
// this parameter is a regular type
info->class_name = arg.type() == Type::Object ? arg.classname() : nullptr;
info->class_name_len = arg.type() == Type::Object && arg.classname() ? ::strlen(arg.classname()) : 0;
info->allow_null = arg.allowNull();
info->pass_by_reference = arg.byReference();
}
/**
* Function that is called by the Zend engine every time that a function gets called
* @param ht
* @param return_value
* @param return_value_ptr
* @param this_ptr
* @param return_value_used
* @param tsrm_ls
* @return integer
*/
static void invoke(INTERNAL_FUNCTION_PARAMETERS);
};
/**
* End of namespace
*/
}
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