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/**
* ConstantFuncs.cpp
*
* C++ implementation of PHP functions to retrieve and set constants.
*
* @author Emiel Bruijntjes <emiel.bruijntjes@copernica.com>
* @copyright 2014 Copernica BV
*/
/**
* Dependencies
*/
#include "includes.h"
/**
* Set up namespace
*/
namespace Php {
/**
* Retrieve the value of a constant by its name
* @param name Name of the constant
* @return Value Actual constant value
*/
Value constant(const char *name)
{
// pass on to other implementation
return constant(name, ::strlen(name));
}
/**
* Retrieve a constant by its name, and the size of the name
* @param constant Name of the constant
* @param size Size of the name
* @return Value
*/
Value constant(const char *constant, size_t size)
{
// we need the tsrm_ls variable
TSRMLS_FETCH();
// retrieve the constant
auto *result = zend_get_constant(zend_string_init(constant, size, 1) TSRMLS_CC);
// did the constant exist?
if (!result) return nullptr;
// return the valid result
return result;
}
/**
* Retrieve the value of a constant by its name
* @param name Name of the constant
* @return Value Actual constant value
*/
Value constant(const std::string &name)
{
// pass on to other implementation
return constant(name.c_str(), name.size());
}
/**
* Define a new constant
* @param name Name of the constant
* @param size Size of the name
* @param value Value of the constant
* @return bool
*/
bool define(const char *name, size_t size, const Value &value)
{
// we need the tsrm_ls variable
TSRMLS_FETCH();
// the constant structure from the zend engine
zend_constant constant;
// copy the name
constant.name = zend_string_init(name, size, 1);
// only scalar values can be used for constants
if (value.isScalar())
{
// make a full copy of the passed in zval
constant.value = *value._val;
zval_copy_ctor(&constant.value);
}
else
{
// we're going to convert the value object into a string, and use that
Value str = value.clone(Type::String);
// use the copied value
constant.value = *str._val;
zval_copy_ctor(&constant.value);
}
// constants are case sensitive (but not persistent, because this is a user
// space constant!)
constant.flags = CONST_CS;
// as module number we use a fake module number
constant.module_number = PHP_USER_CONSTANT;
// register the constant
return zend_register_constant(&constant TSRMLS_CC) == SUCCESS;
}
/**
* Define a new constant
* @param name
* @param value
* @return bool
*/
bool define(const char *name, const Value &value)
{
// define a constant
return define(name, ::strlen(name), value);
}
/**
* Define a new constant
* @param name
* @param value
* @return bool
*/
bool define(const std::string &name, const Value &value)
{
// pass on to the other define function
return define(name.c_str(), name.size(), value);
}
/**
* Check whether a constant exists
* @param name
* @param size
* @return bool
*/
bool defined(const char *name, size_t size)
{
// we need the tsrm_ls variable
TSRMLS_FETCH();
// retrieve the constant
auto *value = zend_get_constant_ex(zend_string_init(name, size, 1), nullptr, ZEND_FETCH_CLASS_SILENT TSRMLS_CC);
// check if the value was found
if (!value) return false;
// constant exists, but the returned zval should first be destructed
// @todo: is this necessary in PHP 7?
zval_dtor(value);
// done
return true;
}
/**
* Check whether a constant exists
* @param name
* @return bool
*/
bool defined(const char *name)
{
// pass on
return defined(name, ::strlen(name));
}
/**
* Check whether a constant exists
* @param name
* @return bool
*/
bool defined(const std::string &name)
{
// pass on
return defined(name.c_str(), name.size());
}
/**
* End namespace
*/
}
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