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php-src/ext/standard/var.c
Zeev Suraski e140b35b04 API update
2001-08-21 12:57:53 +00:00

675 lines
16 KiB
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/*
+----------------------------------------------------------------------+
| PHP version 4.0 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2001 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 2.02 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available at through the world-wide-web at |
| http://www.php.net/license/2_02.txt. |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Jani Lehtimäki <jkl@njet.net> |
| Thies C. Arntzen <thies@thieso.net> |
| Sascha Schumann <sascha@schumann.cx> |
+----------------------------------------------------------------------+
*/
/* $Id: var.c
1.111 2001/08/06 13:36:08 thies Exp $ */
/* {{{ includes
*/
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include "php.h"
#include "php_string.h"
#include "php_var.h"
#include "php_smart_str.h"
#include "basic_functions.h"
#include "php_incomplete_class.h"
#define COMMON ((*struc)->is_ref ? "&" : "")
/* }}} */
/* {{{ php_var_dump */
static int php_array_element_dump(zval **zv, int num_args, va_list args, zend_hash_key *hash_key)
{
int level;
TSRMLS_FETCH();
level = va_arg(args, int);
if (hash_key->nKeyLength==0) { /* numeric key */
php_printf("%*c[%ld]=>\n", level + 1, ' ', hash_key->h);
} else { /* string key */
php_printf("%*c[\"%s\"]=>\n", level + 1, ' ', hash_key->arKey);
}
php_var_dump(zv, level + 2 TSRMLS_CC);
return 0;
}
void php_var_dump(zval **struc, int level TSRMLS_DC)
{
HashTable *myht;
if (level > 1) {
php_printf("%*c", level - 1, ' ');
}
switch (Z_TYPE_PP(struc)) {
case IS_BOOL:
php_printf("%sbool(%s)\n", COMMON, Z_LVAL_PP(struc)?"true":"false");
break;
case IS_NULL:
php_printf("%sNULL\n", COMMON);
break;
case IS_LONG:
php_printf("%sint(%ld)\n", COMMON, Z_LVAL_PP(struc));
break;
case IS_DOUBLE:
php_printf("%sfloat(%.*G)\n", COMMON, (int) EG(precision), Z_DVAL_PP(struc));
break;
case IS_STRING:
php_printf("%sstring(%d) \"", COMMON, Z_STRLEN_PP(struc));
PHPWRITE(Z_STRVAL_PP(struc), Z_STRLEN_PP(struc));
PUTS("\"\n");
break;
case IS_ARRAY:
myht = Z_ARRVAL_PP(struc);
php_printf("%sarray(%d) {\n", COMMON, zend_hash_num_elements(myht));
goto head_done;
case IS_OBJECT:
myht = Z_OBJPROP_PP(struc);
php_printf("%sobject(%s)(%d) {\n", COMMON, Z_OBJCE_PP(struc)->name, zend_hash_num_elements(myht));
head_done:
zend_hash_apply_with_arguments(myht, (apply_func_args_t) php_array_element_dump, 1, level);
if (level > 1) {
php_printf("%*c", level-1, ' ');
}
PUTS("}\n");
break;
case IS_RESOURCE: {
char *type_name;
type_name = zend_rsrc_list_get_rsrc_type(Z_LVAL_PP(struc) TSRMLS_CC);
php_printf("%sresource(%ld) of type (%s)\n", COMMON, Z_LVAL_PP(struc), type_name ? type_name : "Unknown");
break;
}
default:
php_printf("%sUNKNOWN:0\n", COMMON);
break;
}
}
/* }}} */
/* {{{ proto void var_dump(mixed var)
Dumps a string representation of variable to output */
PHP_FUNCTION(var_dump)
{
zval ***args;
int argc;
int i;
argc = ZEND_NUM_ARGS();
args = (zval ***)emalloc(argc * sizeof(zval **));
if (ZEND_NUM_ARGS() == 0 || zend_get_parameters_array_ex(argc, args) == FAILURE) {
efree(args);
WRONG_PARAM_COUNT;
}
for (i=0; i<argc; i++)
php_var_dump(args[i], 1 TSRMLS_CC);
efree(args);
}
/* }}} */
/* {{{ 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;
p = smart_str_print_long(id, (long) var);
*p = '\0';
if (var_old && zend_hash_find(var_hash, id, p - id, 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, id, p - id, &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 void 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();
}
static void php_var_serialize_class(smart_str *buf, zval **struc, zval *retval_ptr, HashTable *var_hash TSRMLS_DC)
{
int count = zend_hash_num_elements(HASH_OF(retval_ptr));
php_var_serialize_class_name(buf, struc TSRMLS_CC);
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;
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;
zend_hash_get_current_data_ex(HASH_OF(retval_ptr),
(void **) &name, &pos);
if (Z_TYPE_PP(name) != IS_STRING) {
php_error(E_NOTICE, "__sleep should return an array only "
"containing the names of instance-variables to "
"serialize.");
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);
}
}
}
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
&& (*struc)->is_ref) {
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[256];
ulong slen;
slen = sprintf(s, "d:%.*G;", (int) EG(precision), Z_DVAL_PP(struc));
smart_str_appendl(buf, s, slen);
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;
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);
zval_ptr_dtor(&retval_ptr);
}
return;
}
if (retval_ptr)
zval_ptr_dtor(&retval_ptr);
/* fall-through */
}
case IS_ARRAY:
myht = HASH_OF(*struc);
i = zend_hash_num_elements(myht);
if (Z_TYPE_PP(struc) == IS_ARRAY) {
smart_str_appendl(buf, "a:", 2);
} else {
php_var_serialize_class_name(buf, struc TSRMLS_CC);
}
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 (zend_hash_get_current_data_ex(myht,
(void **) &data, &pos) != SUCCESS
|| !data
|| data == struc)
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;
}
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);
}
/* }}} */
/* {{{ php_var_unserialize */
PHPAPI int php_var_unserialize(zval **rval, const char **p, const char *max, HashTable *var_hash TSRMLS_DC)
{
const char *q;
char *str;
int i;
char cur;
ulong id;
HashTable *myht;
zval **rval_ref;
if (var_hash && **p != 'R') { /* references aren't counted by serializer! */
zend_hash_next_index_insert(var_hash, rval, sizeof(*rval), NULL);
}
switch (cur = **p) {
case 'R':
if (*((*p) + 1) != ':') {
return 0;
}
q = *p;
while (**p && **p != ';') {
(*p)++;
}
if (**p != ';') {
return 0;
}
(*p)++;
id = atol(q + 2)-1; /* count starts with 1 */
if (!var_hash) {
return 0;
}
if (zend_hash_index_find(var_hash, id, (void *)&rval_ref) != SUCCESS) {
return 0;
}
zval_ptr_dtor(rval);
*rval = *rval_ref;
(*rval)->refcount++;
(*rval)->is_ref = 1;
return 1;
case 'N':
if (*((*p) + 1) != ';') {
return 0;
}
(*p)++;
INIT_PZVAL(*rval);
ZVAL_NULL(*rval);
(*p)++;
return 1;
case 'b': /* bool */
case 'i':
if (*((*p) + 1) != ':') {
return 0;
}
q = *p;
while (**p && **p != ';') {
(*p)++;
}
if (**p != ';') {
return 0;
}
(*p)++;
INIT_PZVAL(*rval);
if (cur == 'b') {
ZVAL_BOOL(*rval, atol(q + 2));
} else {
ZVAL_LONG(*rval, atol(q + 2));
}
return 1;
case 'd':
if (*((*p) + 1) != ':') {
return 0;
}
q = *p;
while (**p && **p != ';') {
(*p)++;
}
if (**p != ';') {
return 0;
}
(*p)++;
INIT_PZVAL(*rval);
ZVAL_DOUBLE(*rval, atof(q + 2));
return 1;
case 's':
if (*((*p) + 1) != ':') {
return 0;
}
(*p) += 2;
q = *p;
while (**p && **p != ':') {
(*p)++;
}
if (**p != ':') {
return 0;
}
i = atoi(q);
if (i < 0 || (*p + 3 + i) > max || *((*p) + 1) != '\"' ||
*((*p) + 2 + i) != '\"' || *((*p) + 3 + i) != ';') {
return 0;
}
(*p) += 2;
if (i == 0) {
str = empty_string;
} else {
str = estrndup(*p, i);
}
(*p) += i + 2;
INIT_PZVAL(*rval);
ZVAL_STRINGL(*rval, str, i, 0);
return 1;
case 'a':
case 'o':
case 'O': {
zend_bool incomplete_class = 0;
char *class_name = NULL;
size_t name_len = 0;
int pi;
INIT_PZVAL(*rval);
if (cur == 'a') {
(*rval)->type = IS_ARRAY;
ALLOC_HASHTABLE((*rval)->value.ht);
myht = (*rval)->value.ht;
} else {
zend_class_entry *ce;
if (cur == 'O') { /* php4 serialized - we get the class-name */
if (*((*p) + 1) != ':') {
return 0;
}
(*p) += 2;
q = *p;
while (**p && **p != ':') {
(*p)++;
}
if (**p != ':') {
return 0;
}
name_len = i = atoi(q);
if (i < 0 || (*p + 3 + i) > max || *((*p) + 1) != '\"' ||
*((*p) + 2 + i) != '\"' || *((*p) + 3 + i) != ':') {
return 0;
}
(*p) += 2;
class_name = emalloc(i + 1);
for(pi=0;pi<i;pi++) {
class_name[pi] = tolower((*p)[pi]);
}
class_name[i] = 0;
(*p) += i;
if (zend_hash_find(EG(class_table), class_name, i+1, (void **) &ce)==FAILURE) {
incomplete_class = 1;
ce = PHP_IC_ENTRY;
}
} else { /* old php 3.0 data 'o' */
ce = &zend_standard_class_def;
}
object_init_ex(*rval, ce);
myht = Z_OBJPROP_PP(rval);
if (incomplete_class)
php_store_class_name(*rval, class_name, name_len);
if (class_name)
efree(class_name);
}
(*p) += 2;
i = atoi(*p);
if (cur == 'a') { /* object_init_ex will init the HashTable for objects! */
zend_hash_init(myht, i + 1, NULL, ZVAL_PTR_DTOR, 0);
}
while (**p && **p != ':') {
(*p)++;
}
if (**p != ':' || *((*p) + 1) != '{') {
return 0;
}
for ((*p) += 2; **p && **p != '}' && i > 0; i--) {
zval *key;
zval *data;
ALLOC_INIT_ZVAL(key);
ALLOC_INIT_ZVAL(data);
if (!php_var_unserialize(&key, p, max, NULL TSRMLS_CC)) {
zval_dtor(key);
FREE_ZVAL(key);
FREE_ZVAL(data);
return 0;
}
if (!php_var_unserialize(&data, p, max, var_hash TSRMLS_CC)) {
zval_dtor(key);
FREE_ZVAL(key);
zval_dtor(data);
FREE_ZVAL(data);
return 0;
}
switch (key->type) {
case IS_LONG:
zend_hash_index_update(myht, Z_LVAL_P(key), &data, sizeof(data), NULL);
break;
case IS_STRING:
zend_hash_update(myht, Z_STRVAL_P(key), Z_STRLEN_P(key) + 1, &data, sizeof(data), NULL);
break;
}
zval_dtor(key);
FREE_ZVAL(key);
}
if ((*rval)->type == IS_OBJECT) {
zval *retval_ptr = NULL;
zval fname;
INIT_PZVAL(&fname);
ZVAL_STRINGL(&fname, "__wakeup", sizeof("__wakeup") - 1, 0);
call_user_function_ex(CG(function_table), rval, &fname, &retval_ptr, 0, 0, 1, NULL TSRMLS_CC);
if (retval_ptr)
zval_ptr_dtor(&retval_ptr);
}
return *((*p)++) == '}';
}
}
return 0;
}
/* }}} */
/* {{{ 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;
}
return_value->type = IS_STRING;
return_value->value.str.val = NULL;
return_value->value.str.len = 0;
PHP_VAR_SERIALIZE_INIT(var_hash);
php_var_serialize(&buf, struc, &var_hash TSRMLS_CC);
PHP_VAR_SERIALIZE_DESTROY(var_hash);
RETVAL_STRINGL(buf.c, buf.len, 0);
}
/* }}} */
/* {{{ proto mixed unserialize(string variable_representation)
Takes a string representation of variable and recreates it */
PHP_FUNCTION(unserialize)
{
zval **buf;
php_serialize_data_t var_hash;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &buf) == FAILURE) {
WRONG_PARAM_COUNT;
}
if ((*buf)->type == IS_STRING) {
const char *p = (*buf)->value.str.val;
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(E_NOTICE, "unserialize() failed at offset %d of %d bytes", p - Z_STRVAL_PP(buf), Z_STRLEN_PP(buf));
RETURN_FALSE;
}
PHP_VAR_UNSERIALIZE_DESTROY(var_hash);
} else {
php_error(E_NOTICE, "argument passed to unserialize() is not an string");
RETURN_FALSE;
}
}
/* }}} */
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: sw=4 ts=4 tw=78 fdm=marker
* vim<600: sw=4 ts=4 tw=78
*/
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