Fix undefined behavior

The callbacks are expected to return an integer, and returning void
instead was triggering weird bugs

I've also removed the casts to ensure that the signatures are compatible

diff --git a/ext/twig/twig.c b/ext/twig/twig.c
index 06b8603..75fd37c 100644 (file)
--- a/ext/twig/twig.c
+++ b/ext/twig/twig.c
@@ -546,7 +546,7 @@ void TWIG_NEW(zval *object, char *class, zval *value TSRMLS_DC)
        TWIG_CALL_Z(object, "__construct", value TSRMLS_CC);
 }
 
-static void twig_add_array_key_to_string(zval **zv TSRMLS_DC, int num_args, va_list args, zend_hash_key *hash_key)
+static int twig_add_array_key_to_string(void *pDest TSRMLS_DC, int num_args, va_list args, zend_hash_key *hash_key)
 {
        smart_str *buf;
        char *joiner;
@@ -570,6 +570,8 @@ static void twig_add_array_key_to_string(zval **zv TSRMLS_DC, int num_args, va_l
                efree(key);
                efree(tmp_str);
        }
+
+       return 0;
 }
 
 char *TWIG_IMPLODE_ARRAY_KEYS(char *joiner, zval *array TSRMLS_DC)
@@ -577,7 +579,7 @@ char *TWIG_IMPLODE_ARRAY_KEYS(char *joiner, zval *array TSRMLS_DC)
        smart_str collector = { 0, 0, 0 };
 
        smart_str_appendl(&collector, "", 0);
-       zend_hash_apply_with_arguments(HASH_OF(array) TSRMLS_CC, (apply_func_args_t) twig_add_array_key_to_string, 2, &collector, joiner);
+       zend_hash_apply_with_arguments(HASH_OF(array) TSRMLS_CC, twig_add_array_key_to_string, 2, &collector, joiner);
        smart_str_0(&collector);
 
        return collector.c;
@@ -615,26 +617,30 @@ char *TWIG_GET_CLASS_NAME(zval *object TSRMLS_DC)
        return class_name;
 }
 
-static void twig_add_method_to_class(zend_function *mptr TSRMLS_DC, int num_args, va_list args, zend_hash_key *hash_key)
+static int twig_add_method_to_class(void *pDest TSRMLS_DC, int num_args, va_list args, zend_hash_key *hash_key)
 {
        zval *retval;
        char *item;
+       zend_function *mptr = (zend_function *) pDest;
 
        if ( ! (mptr->common.fn_flags & ZEND_ACC_PUBLIC ) ) {
-               return;
+               return 0;
        }
 
        retval = va_arg(args, zval*);
        item = php_strtolower(mptr->common.function_name, strlen(mptr->common.function_name));
 
        add_assoc_string(retval, item, item, 1);
+
+       return 0;
 }
 
-static int twig_add_property_to_class(zend_property_info *pptr TSRMLS_DC, int num_args, va_list args, zend_hash_key *hash_key)
+static int twig_add_property_to_class(void *pDest TSRMLS_DC, int num_args, va_list args, zend_hash_key *hash_key)
 {
        zend_class_entry *ce;
        zval *retval;
        char *class_name, *prop_name;
+       zend_property_info *pptr = (zend_property_info *) pDest;
 
        if ( ! (pptr->flags & ZEND_ACC_PUBLIC ) ) {
                return 0;
@@ -651,13 +657,13 @@ static int twig_add_property_to_class(zend_property_info *pptr TSRMLS_DC, int nu
 }
 
 /* {{{ _adddynproperty */
-static int twig_add_dyn_property_to_class(zval **pptr TSRMLS_DC, int num_args, va_list args, zend_hash_key *hash_key)
+static int twig_add_dyn_property_to_class(void *pDest TSRMLS_DC, int num_args, va_list args, zend_hash_key *hash_key)
 {
        zend_class_entry *ce = *va_arg(args, zend_class_entry**);
        zval *retval = va_arg(args, zval*), member;
        char *class_name, *prop_name;
 
-       if (hash_key->arKey[0] == '\0') {
+       if (hash_key->nKeyLength < 1 || hash_key->arKey[0] == '\0') {
                return 0; /* non public cannot be dynamic */
        }
 
@@ -683,12 +689,12 @@ static void twig_add_class_to_cache(zval *cache, zval *object, char *class_name
        array_init(class_methods);
        array_init(class_properties);
        // add all methods to self::cache[$class]['methods']
-       zend_hash_apply_with_arguments(&class_ce->function_table TSRMLS_CC, (apply_func_args_t) twig_add_method_to_class, 1, class_methods);
-       zend_hash_apply_with_arguments(&class_ce->properties_info TSRMLS_CC, (apply_func_args_t) twig_add_property_to_class, 2, &class_ce, class_properties);
+       zend_hash_apply_with_arguments(&class_ce->function_table TSRMLS_CC, twig_add_method_to_class, 1, class_methods);
+       zend_hash_apply_with_arguments(&class_ce->properties_info TSRMLS_CC, twig_add_property_to_class, 2, &class_ce, class_properties);
 
        if (object && Z_OBJ_HT_P(object)->get_properties) {
                HashTable *properties = Z_OBJ_HT_P(object)->get_properties(object TSRMLS_CC);
-               zend_hash_apply_with_arguments(properties TSRMLS_CC, (apply_func_args_t) twig_add_dyn_property_to_class, 2, &class_ce, class_properties);
+               zend_hash_apply_with_arguments(properties TSRMLS_CC, twig_add_dyn_property_to_class, 2, &class_ce, class_properties);
        }
        add_assoc_zval(class_info, "methods", class_methods);
        add_assoc_zval(class_info, "properties", class_properties);