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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();
// we're going to load a class-entry
zend_class_entry **ce;
// should we autoload the class?
if (autoload)
{
// no auto-load
if (SUCCESS != zend_lookup_class(classname, len, &ce TSRMLS_CC)) 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--; }
// all classes are in lowercase in the hash, so we make
// a temporary buffer for storing the lowercase class name
// (is this smart? memory allocation is expensive!)
std::unique_ptr<char[]> lc_name(new char[len + 1]);
// copy the name to lowercase, but ignore the starting slash (if there is one)
zend_str_tolower_copy(lc_name.get(), classname, len);
// see if there is a class with this name
if (SUCCESS != zend_hash_find(EG(class_table), lc_name.get(), len + 1, (void **) &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);
}
}
/**
* End of namespace
*/
}
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