var.c

php-4.4.7学习linux时下载的源代码

	if (return_output) {
		php_ob_get_buffer (return_value TSRMLS_CC);
		php_end_ob_buffer (0, 0 TSRMLS_CC);
	}
}
/* }}} */



/* {{{ php_var_serialize */

static void php_var_serialize_intern(smart_str *buf, zval **struc, HashTable *var_hash TSRMLS_DC);

static inline int php_add_var_hash(HashTable *var_hash, zval *var, void *var_old)
{
	ulong var_no;
	char id[32], *p;
	register int len;

	/* relies on "(long)" being a perfect hash function for data pointers */
	p = smart_str_print_long(id + sizeof(id) - 1, (long) var);
	len = id + sizeof(id) - 1 - p;
	
	if (var_old && zend_hash_find(var_hash, p, len, var_old) == SUCCESS) {
		if (!var->is_ref) {
			/* we still need to bump up the counter, since non-refs will
			   be counted separately by unserializer */
			var_no = -1;
			zend_hash_next_index_insert(var_hash, &var_no, sizeof(var_no), NULL);
		}
		return FAILURE;
	}
	
	/* +1 because otherwise hash will think we are trying to store NULL pointer */
	var_no = zend_hash_num_elements(var_hash) + 1;
	zend_hash_add(var_hash, p, len, &var_no, sizeof(var_no), NULL);
	return SUCCESS;
}

static inline void php_var_serialize_long(smart_str *buf, long val)
{
	smart_str_appendl(buf, "i:", 2);
	smart_str_append_long(buf, val);
	smart_str_appendc(buf, ';');
}

static inline void php_var_serialize_string(smart_str *buf, char *str, int len)
{
	smart_str_appendl(buf, "s:", 2);
	smart_str_append_long(buf, len);
	smart_str_appendl(buf, ":\"", 2);
	smart_str_appendl(buf, str, len);
	smart_str_appendl(buf, "\";", 2);
}

static inline zend_bool php_var_serialize_class_name(smart_str *buf, zval **struc TSRMLS_DC)
{
	PHP_CLASS_ATTRIBUTES;

	PHP_SET_CLASS_ATTRIBUTES(*struc);
	smart_str_appendl(buf, "O:", 2);
	smart_str_append_long(buf, name_len);
	smart_str_appendl(buf, ":\"", 2);
	smart_str_appendl(buf, class_name, name_len);
	smart_str_appendl(buf, "\":", 2);
	PHP_CLEANUP_CLASS_ATTRIBUTES();
	return incomplete_class;
}

static void php_var_serialize_class(smart_str *buf, zval **struc, zval *retval_ptr, HashTable *var_hash TSRMLS_DC)
{
	int count;
	zend_bool  incomplete_class;

	incomplete_class = php_var_serialize_class_name(buf, struc TSRMLS_CC);
	/* count after serializing name, since php_var_serialize_class_name
	   changes the count if the variable is incomplete class */
	count = zend_hash_num_elements(HASH_OF(retval_ptr));
	if (incomplete_class) {
		--count;
	}
	smart_str_append_long(buf, count);
	smart_str_appendl(buf, ":{", 2);

	if (count > 0) {
		char *key;
		zval **d, **name;
		ulong index;
		HashPosition pos;
		int i;
		zval nval, *nvalp;

		ZVAL_NULL(&nval);
		nvalp = &nval;

		zend_hash_internal_pointer_reset_ex(HASH_OF(retval_ptr), &pos);
	
		for (;; zend_hash_move_forward_ex(HASH_OF(retval_ptr), &pos)) {
			i = zend_hash_get_current_key_ex(HASH_OF(retval_ptr), &key, NULL, 
					&index, 0, &pos);
			
			if (i == HASH_KEY_NON_EXISTANT)
				break;

			if (incomplete_class && strcmp(key, MAGIC_MEMBER) == 0) {
				continue;
			}
			zend_hash_get_current_data_ex(HASH_OF(retval_ptr), 
					(void **) &name, &pos);

			if (Z_TYPE_PP(name) != IS_STRING) {
				php_error_docref(NULL TSRMLS_CC, E_NOTICE, "__sleep should return an array only "
						"containing the names of instance-variables to "
						"serialize.");
				/* we should still add element even if it's not OK,
				   since we already wrote the length of the array before */
				smart_str_appendl(buf,"N;", 2);
				continue;
			}
			if (zend_hash_find(Z_OBJPROP_PP(struc), Z_STRVAL_PP(name), 
						Z_STRLEN_PP(name) + 1, (void *) &d) == SUCCESS) {
				php_var_serialize_string(buf, Z_STRVAL_PP(name), Z_STRLEN_PP(name));	
				php_var_serialize_intern(buf, d, var_hash TSRMLS_CC);	
			} else {
				php_var_serialize_string(buf, Z_STRVAL_PP(name), Z_STRLEN_PP(name));	
				php_var_serialize_intern(buf, &nvalp, var_hash TSRMLS_CC);	
			}
		}
	}
	smart_str_appendc(buf, '}');
}


static void php_var_serialize_intern(smart_str *buf, zval **struc, HashTable *var_hash TSRMLS_DC)
{
	int i;
	ulong *var_already;
	HashTable *myht;

	if (var_hash 
	    && php_add_var_hash(var_hash, *struc, (void *) &var_already) == FAILURE) {
		if((*struc)->is_ref) {
		smart_str_appendl(buf, "R:", 2);
		smart_str_append_long(buf, *var_already);
		smart_str_appendc(buf, ';');
		return;
		} else if(Z_TYPE_PP(struc) == IS_OBJECT) {
			smart_str_appendl(buf, "r:", 2);
			smart_str_append_long(buf, *var_already);
			smart_str_appendc(buf, ';');
			return;
		}
	}

	switch (Z_TYPE_PP(struc)) {
		case IS_BOOL:
			smart_str_appendl(buf, "b:", 2);
			smart_str_append_long(buf, Z_LVAL_PP(struc));
			smart_str_appendc(buf, ';');
			return;

		case IS_NULL:
			smart_str_appendl(buf, "N;", 2);
			return;

		case IS_LONG:
			php_var_serialize_long(buf, Z_LVAL_PP(struc));
			return;

		case IS_DOUBLE: {
				char *s;
				ulong slen;

				slen = spprintf(&s, 0, "d:%.*G;", (int) PG(serialize_precision), Z_DVAL_PP(struc));
				smart_str_appendl(buf, s, slen);
				efree(s);
				return;
			}

		case IS_STRING:
			php_var_serialize_string(buf, Z_STRVAL_PP(struc), Z_STRLEN_PP(struc));
			return;

		case IS_OBJECT: {
				zval *retval_ptr = NULL;
				zval fname;
				int res;

				if(Z_OBJCE_PP(struc) != PHP_IC_ENTRY) {
				INIT_PZVAL(&fname);
				ZVAL_STRINGL(&fname, "__sleep", sizeof("__sleep") - 1, 0);
				res = call_user_function_ex(CG(function_table), struc, &fname, 
						&retval_ptr, 0, 0, 1, NULL TSRMLS_CC);

				if (res == SUCCESS) {
					if (retval_ptr) {
					   	if (HASH_OF(retval_ptr)) {
							php_var_serialize_class(buf, struc, retval_ptr, 
									var_hash TSRMLS_CC);
						} else {
							php_error_docref(NULL TSRMLS_CC, E_NOTICE, "__sleep should return an array only "
												"containing the names of instance-variables to "
												"serialize.");
							/* we should still add element even if it's not OK,
				   			   since we already wrote the length of the array before */
							smart_str_appendl(buf,"N;", 2);
						}

						zval_ptr_dtor(&retval_ptr);
					}
					return;	
				}
				}
				
				if (retval_ptr)
					zval_ptr_dtor(&retval_ptr);
				/* fall-through */
			}
		case IS_ARRAY: {
			zend_bool incomplete_class = 0;
			if (Z_TYPE_PP(struc) == IS_ARRAY) {
				smart_str_appendl(buf, "a:", 2);
				myht = HASH_OF(*struc);
			} else {
				incomplete_class = php_var_serialize_class_name(buf, struc TSRMLS_CC);
				myht = Z_OBJPROP_PP(struc);
			}
			/* count after serializing name, since php_var_serialize_class_name
			   changes the count if the variable is incomplete class */
			i = myht ? zend_hash_num_elements(myht) : 0;
			if (i > 0 && incomplete_class) {
				--i;
			}
			smart_str_append_long(buf, i);
			smart_str_appendl(buf, ":{", 2);
			if (i > 0) {
				char *key;
				zval **data;
				ulong index;
				uint key_len;
				HashPosition pos;
				
				zend_hash_internal_pointer_reset_ex(myht, &pos);
				for (;; zend_hash_move_forward_ex(myht, &pos)) {
					i = zend_hash_get_current_key_ex(myht, &key, &key_len, 
							&index, 0, &pos);
					if (i == HASH_KEY_NON_EXISTANT)
						break;
					
					if (incomplete_class && strcmp(key, MAGIC_MEMBER) == 0) {
						continue;
					}		
					
					switch (i) {
					  case HASH_KEY_IS_LONG:
							php_var_serialize_long(buf, index);
							break;
						case HASH_KEY_IS_STRING:
							php_var_serialize_string(buf, key, key_len - 1);
							break;
					}

					/* we should still add element even if it's not OK,
					   since we already wrote the length of the array before */
					if (zend_hash_get_current_data_ex(myht, 
						(void **) &data, &pos) != SUCCESS 
						|| !data 
						|| data == struc) {
						smart_str_appendl(buf, "N;", 2);
					} else {
						php_var_serialize_intern(buf, data, var_hash TSRMLS_CC);
					}
				}
			}
			smart_str_appendc(buf, '}');
			return;
		}
		default:
			smart_str_appendl(buf, "i:0;", 4);
			return;
	} 
}

PHPAPI void php_var_serialize(smart_str *buf, zval **struc, HashTable *var_hash TSRMLS_DC)
{
	php_var_serialize_intern(buf, struc, var_hash TSRMLS_CC);
	smart_str_0(buf);
}
	
/* }}} */

/* {{{ proto string serialize(mixed variable)
   Returns a string representation of variable (which can later be unserialized) */
PHP_FUNCTION(serialize)
{
	zval **struc;
	php_serialize_data_t var_hash;
	smart_str buf = {0};

	if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &struc) == FAILURE) {
		WRONG_PARAM_COUNT;
	}

	Z_TYPE_P(return_value) = IS_STRING;
	Z_STRVAL_P(return_value) = NULL;
	Z_STRLEN_P(return_value) = 0;

	PHP_VAR_SERIALIZE_INIT(var_hash);
	php_var_serialize(&buf, struc, &var_hash TSRMLS_CC);
	PHP_VAR_SERIALIZE_DESTROY(var_hash);

	if (buf.c) {
		RETURN_STRINGL(buf.c, buf.len, 0);
	} else {
		RETURN_NULL();
	}
}

/* }}} */
/* {{{ proto mixed unserialize(string variable_representation)
   Takes a string representation of variable and recreates it */


PHP_FUNCTION(unserialize)
{
	zval **buf;
	php_unserialize_data_t var_hash;
	
	if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &buf) == FAILURE) {
		WRONG_PARAM_COUNT;
	}

	if (Z_TYPE_PP(buf) == IS_STRING) {
		const unsigned char *p = (unsigned char*)Z_STRVAL_PP(buf);

		if (Z_STRLEN_PP(buf) == 0) {
			RETURN_FALSE;
		}

		PHP_VAR_UNSERIALIZE_INIT(var_hash);
		if (!php_var_unserialize(&return_value, &p, p + Z_STRLEN_PP(buf),  &var_hash TSRMLS_CC)) {
			PHP_VAR_UNSERIALIZE_DESTROY(var_hash);
			zval_dtor(return_value);
			php_error_docref(NULL TSRMLS_CC, E_NOTICE, "Error at offset %ld of %d bytes", (long)((char*)p - Z_STRVAL_PP(buf)), Z_STRLEN_PP(buf));
			RETURN_FALSE;
		}
		PHP_VAR_UNSERIALIZE_DESTROY(var_hash);
	} else {
		php_error_docref(NULL TSRMLS_CC, E_NOTICE, "Argument is not a string");
		RETURN_FALSE;
	}
}

/* }}} */

#if MEMORY_LIMIT
/* {{{ proto int memory_get_usage()
    Returns the allocated by PHP memory */
PHP_FUNCTION(memory_get_usage) {
	RETURN_LONG(AG(allocated_memory));
}
/* }}} */
#endif

/*
 * Local variables:
 * tab-width: 4
 * c-basic-offset: 4
 * End:
 * vim600: sw=4 ts=4 fdm=marker
 * vim<600: sw=4 ts=4
 */