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php-src/ext/standard/var.c
Andi Gutmans eb6ba01d1c - Fix copyright notices with 2001
2001-02-26 06:11:02 +00:00

675 lines
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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> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
/* {{{ includes
*/
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include "php.h"
#include "php_string.h"
#include "php_var.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;
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);
return 0;
}
void php_var_dump(pval **struc, int level)
{
HashTable *myht;
if (level>1) {
php_printf("%*c", level-1, ' ');
}
switch ((*struc)->type) {
case IS_BOOL:
php_printf("%sbool(%s)\n", COMMON, ((*struc)->value.lval?"true":"false"));
break;
case IS_NULL:
php_printf("%sNULL\n", COMMON);
break;
case IS_LONG:
php_printf("%sint(%ld)\n", COMMON, (*struc)->value.lval);
break;
case IS_DOUBLE: {
ELS_FETCH();
php_printf("%sfloat(%.*G)\n", COMMON, (int) EG(precision), (*struc)->value.dval);
}
break;
case IS_STRING:
php_printf("%sstring(%d) \"", COMMON, (*struc)->value.str.len);
PHPWRITE((*struc)->value.str.val, (*struc)->value.str.len);
PUTS("\"\n");
break;
case IS_ARRAY:
myht = HASH_OF(*struc);
php_printf("%sarray(%d) {\n", COMMON, zend_hash_num_elements(myht));
goto head_done;
case IS_OBJECT:
myht = HASH_OF(*struc);
php_printf("%sobject(%s)(%d) {\n", COMMON, (*struc)->value.obj.ce->name, zend_hash_num_elements(myht));
head_done:
zend_hash_apply_with_arguments(myht, (ZEND_STD_HASH_APPLIER) 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((*struc)->value.lval);
php_printf("%sresource(%ld) of type (%s)\n", COMMON, (*struc)->value.lval, 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);
efree(args);
}
/* }}} */
/* {{{ php_var_dump */
#define STR_CAT(P,S,I) {\
pval *__p = (P);\
ulong __i = __p->value.str.len;\
__p->value.str.len += (I);\
if (__p->value.str.val) {\
__p->value.str.val = (char *)erealloc(__p->value.str.val, __p->value.str.len + 1);\
} else {\
__p->value.str.val = emalloc(__p->value.str.len + 1);\
*__p->value.str.val = 0;\
}\
strcat(__p->value.str.val + __i, (S));\
}
/* }}} */
/* {{{ php_var_serialize */
inline int php_add_var_hash(HashTable *var_hash, zval *var, void *var_old) {
ulong var_no;
char id[sizeof(void *)*2+3];
snprintf(id,sizeof(id)-1, "%p", var);
id[sizeof(id)-1]='\0';
if(var_old && zend_hash_find(var_hash, id, strlen(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;
}
var_no = zend_hash_num_elements(var_hash)+1; /* +1 because otherwise hash will think we are trying to store NULL pointer */
zend_hash_add(var_hash, id, strlen(id), &var_no, sizeof(var_no), NULL);
return SUCCESS;
}
void php_var_serialize(pval *buf, pval **struc, HashTable *var_hash)
{
char s[256];
ulong slen;
int i;
ulong *var_already;
HashTable *myht;
BLS_FETCH();
if(var_hash != NULL && php_add_var_hash(var_hash,*struc,(void *)&var_already) == FAILURE && (*struc)->is_ref) {
slen = sprintf(s,"R:%ld;",*var_already);
STR_CAT(buf, s, slen);
return;
}
switch ((*struc)->type) {
case IS_BOOL:
slen = sprintf(s, "b:%ld;", (*struc)->value.lval);
STR_CAT(buf, s, slen);
return;
case IS_NULL:
STR_CAT(buf, "N;", 2);
return;
case IS_LONG:
slen = sprintf(s, "i:%ld;", (*struc)->value.lval);
STR_CAT(buf, s, slen);
return;
case IS_DOUBLE: {
ELS_FETCH();
slen = sprintf(s, "d:%.*G;",(int) EG(precision), (*struc)->value.dval);
STR_CAT(buf, s, slen);
}
return;
case IS_STRING:{
char *p;
i = buf->value.str.len;
slen = sprintf(s, "s:%d:\"", (*struc)->value.str.len);
STR_CAT(buf, s, slen + (*struc)->value.str.len + 2);
p = buf->value.str.val + i + slen;
if ((*struc)->value.str.len > 0) {
memcpy(p, (*struc)->value.str.val, (*struc)->value.str.len);
p += (*struc)->value.str.len;
}
*p++ = '\"';
*p++ = ';';
*p = 0;
}
return;
case IS_OBJECT: {
zval *retval_ptr = NULL;
zval *fname;
int res;
PHP_CLASS_ATTRIBUTES;
CLS_FETCH();
MAKE_STD_ZVAL(fname);
ZVAL_STRING(fname,"__sleep",1);
res = call_user_function_ex(CG(function_table), struc, fname, &retval_ptr, 0, 0, 1, NULL);
if (res == SUCCESS) {
if (retval_ptr && HASH_OF(retval_ptr)) {
int count = zend_hash_num_elements(HASH_OF(retval_ptr));
PHP_SET_CLASS_ATTRIBUTES(*struc);
slen = sprintf(s, "O:%d:\"%s\":%d:{",name_len,class_name, count);
PHP_CLEANUP_CLASS_ATTRIBUTES();
STR_CAT(buf, s, slen);
if (count > 0) {
char *key;
zval **d,**name;
ulong index;
HashPosition pos;
zend_hash_internal_pointer_reset_ex(HASH_OF(retval_ptr),&pos);
for (;; zend_hash_move_forward_ex(HASH_OF(retval_ptr),&pos)) {
if ((i = zend_hash_get_current_key_ex(HASH_OF(retval_ptr), &key, NULL, &index, 0, &pos)) == HASH_KEY_NON_EXISTANT) {
break;
}
zend_hash_get_current_data_ex(HASH_OF(retval_ptr), (void **) (&name), &pos);
if ((*name)->type != 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((*struc)->value.obj.properties,(*name)->value.str.val,(*name)->value.str.len+1,(void*)&d) == SUCCESS) {
php_var_serialize(buf, name, NULL);
php_var_serialize(buf,d,var_hash);
}
}
}
STR_CAT(buf, "}", 1);
}
} else {
zval_dtor(fname);
FREE_ZVAL(fname);
if (retval_ptr) {
zval_ptr_dtor(&retval_ptr);
}
goto std_array;
}
zval_dtor(fname);
FREE_ZVAL(fname);
if (retval_ptr) {
zval_ptr_dtor(&retval_ptr);
}
return;
}
case IS_ARRAY:
std_array:
myht = HASH_OF(*struc);
i = zend_hash_num_elements(myht);
if ((*struc)->type == IS_ARRAY) {
slen = sprintf(s, "a:%d:{", i);
} else {
PHP_CLASS_ATTRIBUTES;
PHP_SET_CLASS_ATTRIBUTES(*struc);
slen = sprintf(s, "O:%d:\"%s\":%d:{",name_len,class_name,i);
PHP_CLEANUP_CLASS_ATTRIBUTES();
}
STR_CAT(buf, s, slen);
if (i > 0) {
char *key;
pval **data,*d;
ulong index;
HashPosition pos;
zend_hash_internal_pointer_reset_ex(myht, &pos);
for (;; zend_hash_move_forward_ex(myht, &pos)) {
if ((i = zend_hash_get_current_key_ex(myht, &key, NULL, &index, 0, &pos)) == 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:
MAKE_STD_ZVAL(d);
d->type = IS_LONG;
d->value.lval = index;
php_var_serialize(buf, &d, NULL);
FREE_ZVAL(d);
break;
case HASH_KEY_IS_STRING:
MAKE_STD_ZVAL(d);
d->type = IS_STRING;
d->value.str.val = key;
d->value.str.len = strlen(key);
php_var_serialize(buf, &d, NULL);
FREE_ZVAL(d);
break;
}
php_var_serialize(buf, data, var_hash);
}
}
STR_CAT(buf, "}", 1);
return;
default:
STR_CAT(buf, "i:0;", 4);
return;
}
}
/* }}} */
/* {{{ php_var_dump */
int php_var_unserialize(pval **rval, const char **p, const char *max, HashTable *var_hash)
{
const char *q;
char *str;
int i;
char cur;
ulong id;
HashTable *myht;
pval **rval_ref;
ELS_FETCH();
BLS_FETCH();
if(var_hash) {
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);
(*rval)->type = IS_NULL;
(*p)++;
return 1;
case 'b': /* bool */
case 'i':
if (*((*p) + 1) != ':') {
return 0;
}
q = *p;
while (**p && **p != ';') {
(*p)++;
}
if (**p != ';') {
return 0;
}
(*p)++;
if (cur == 'b') {
(*rval)->type = IS_BOOL;
} else {
(*rval)->type = IS_LONG;
}
INIT_PZVAL(*rval);
(*rval)->value.lval = atol(q + 2);
return 1;
case 'd':
if (*((*p) + 1) != ':') {
return 0;
}
q = *p;
while (**p && **p != ';') {
(*p)++;
}
if (**p != ';') {
return 0;
}
(*p)++;
(*rval)->type = IS_DOUBLE;
INIT_PZVAL(*rval);
(*rval)->value.dval = 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;
(*rval)->type = IS_STRING;
(*rval)->value.str.val = str;
(*rval)->value.str.len = i;
INIT_PZVAL(*rval);
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_READ;
}
} else { /* old php 3.0 data 'o' */
ce = &zend_standard_class_def;
}
object_init_ex(*rval,ce);
myht = (*rval)->value.obj.properties;
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--) {
pval *key;
pval *data;
ALLOC_INIT_ZVAL(key);
ALLOC_INIT_ZVAL(data);
if (!php_var_unserialize(&key, p, max, NULL)) {
zval_dtor(key);
FREE_ZVAL(key);
FREE_ZVAL(data);
return 0;
}
if (!php_var_unserialize(&data, p, max, var_hash)) {
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, key->value.lval, &data, sizeof(data), NULL);
break;
case IS_STRING:
zend_hash_update(myht, key->value.str.val, key->value.str.len + 1, &data, sizeof(data), NULL);
break;
}
zval_dtor(key);
FREE_ZVAL(key);
}
if ((*rval)->type == IS_OBJECT) {
zval *retval_ptr = NULL;
zval *fname;
CLS_FETCH();
MAKE_STD_ZVAL(fname);
ZVAL_STRING(fname,"__wakeup",1);
call_user_function_ex(CG(function_table), rval, fname, &retval_ptr, 0, 0, 1, NULL);
zval_dtor(fname);
FREE_ZVAL(fname);
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)
{
pval **struc;
php_serialize_data_t var_hash;
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(return_value, struc, &var_hash);
PHP_VAR_SERIALIZE_DESTROY(var_hash);
}
/* }}} */
/* {{{ proto mixed unserialize(string variable_representation)
Takes a string representation of variable and recreates it */
PHP_FUNCTION(unserialize)
{
pval **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 ((*buf)->value.str.len == 0) {
RETURN_FALSE;
}
PHP_VAR_UNSERIALIZE_INIT(var_hash);
if (!php_var_unserialize(&return_value, &p, p + (*buf)->value.str.len, &var_hash)) {
PHP_VAR_UNSERIALIZE_DESTROY(var_hash);
zval_dtor(return_value);
php_error(E_NOTICE, "unserialize() failed at offset %d of %d bytes",p-(*buf)->value.str.val,(*buf)->value.str.len);
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:
*/
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