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/**
* Exists.cpp
*
* This file holds the implementation of all *_exists() functions,
* like class_exists(), et cetera
*
* @author andot <https://github.com/andot>
*/
/**
* Dependencies
*/
#include "includes.h"
/**
* On php 5.3 ZEND_ACC_TRAIT isn't defined, so we simply define it to 0
* so all operations with it are basically no-ops. Currently unconfirmed
* if this actually works correctly on php 5.3, but it at least compiles.
*/
#ifndef ZEND_ACC_TRAIT
#define ZEND_ACC_TRAIT 0
#endif
/**
* Open the PHP namespace
*/
namespace Php {
/**
* Check whether a class with a certain name exists
* @param classname
* @param len
* @param autoload
* @return bool
*/
bool class_exists(const char *classname, size_t len, bool autoload)
{
// we need the tsrm_ls variable
TSRMLS_FETCH();
// should we autoload the class?
if (autoload)
{
// retrieve class entry
auto *ce = zend_lookup_class(zend_string_init(classname, len, 1) TSRMLS_CC);
// no auto-load
if (!ce) return false;
// the found "class" could also be an interface or trait, which we do no want
return (ce->ce_flags & (ZEND_ACC_INTERFACE | (ZEND_ACC_TRAIT - ZEND_ACC_EXPLICIT_ABSTRACT_CLASS))) == 0;
}
else
{
// starting slashes can be ignored
if (len > 0 && classname[0] == '\\') { classname++; len--; }
// allocate a zend_string
auto *string = zend_string_alloc(len, 1);
// copy the name to lowercase, but ignore the starting slash (if there is one)
zend_str_tolower_copy(ZSTR_VAL(string), classname, len);
// see if there is a class with this name
auto *val = zend_hash_find(EG(class_table), string);
// check whether something was found
if (val == nullptr) return false;
// the "something" could also be an interface or trait, which we do no want
return !(((Z_CE_P(val))->ce_flags & (ZEND_ACC_INTERFACE | ZEND_ACC_TRAIT)) > ZEND_ACC_EXPLICIT_ABSTRACT_CLASS);
}
}
/**
* End of namespace
*/
}
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