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php-src/ext/json/json.c

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/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2007 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.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. |
+----------------------------------------------------------------------+
| Author: Omar Kilani <omar@php.net> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "php.h"
#include "php_ini.h"
#include "ext/standard/info.h"
#include "ext/standard/php_smart_str.h"
#include "utf8_to_utf16.h"
#include "JSON_parser.h"
#include "php_json.h"
static const char digits[] = "0123456789abcdef";
/* {{{ json_functions[]
*
* Every user visible function must have an entry in json_functions[].
*/
function_entry json_functions[] = {
PHP_FE(json_encode, NULL)
PHP_FE(json_decode, NULL)
{NULL, NULL, NULL} /* Must be the last line in json_functions[] */
};
/* }}} */
/* {{{ json_module_entry
*/
zend_module_entry json_module_entry = {
#if ZEND_MODULE_API_NO >= 20010901
STANDARD_MODULE_HEADER,
#endif
"json",
json_functions,
NULL,
NULL,
NULL,
NULL,
PHP_MINFO(json),
#if ZEND_MODULE_API_NO >= 20010901
PHP_JSON_VERSION,
#endif
STANDARD_MODULE_PROPERTIES
};
/* }}} */
#ifdef COMPILE_DL_JSON
ZEND_GET_MODULE(json)
#endif
/* {{{ PHP_MINFO_FUNCTION
*/
PHP_MINFO_FUNCTION(json)
{
php_info_print_table_start();
php_info_print_table_row(2, "json support", "enabled");
php_info_print_table_row(2, "json version", PHP_JSON_VERSION);
php_info_print_table_end();
}
/* }}} */
static void json_encode_r(smart_str *buf, zval *val TSRMLS_DC);
static void json_escape_string(smart_str *buf, zstr s, int len, zend_uchar type);
static int json_determine_array_type(zval **val TSRMLS_DC) /* {{{ */
{
int i;
HashTable *myht = HASH_OF(*val);
i = myht ? zend_hash_num_elements(myht) : 0;
if (i > 0) {
zstr key;
ulong index, idx;
uint key_len;
HashPosition pos;
zend_hash_internal_pointer_reset_ex(myht, &pos);
idx = 0;
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 (i == HASH_KEY_IS_STRING || i == HASH_KEY_IS_UNICODE) {
return 1;
} else {
if (index != idx) {
return 1;
}
}
idx++;
}
}
return 0;
}
/* }}} */
static void json_encode_array(smart_str *buf, zval **val TSRMLS_DC) /* {{{ */
{
int i, r;
HashTable *myht;
if (Z_TYPE_PP(val) == IS_ARRAY) {
myht = HASH_OF(*val);
r = json_determine_array_type(val TSRMLS_CC);
} else {
myht = Z_OBJPROP_PP(val);
r = 1;
}
if (myht && myht->nApplyCount > 1) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "recursion detected");
smart_str_appendl(buf, "null", 4);
return;
}
if (r == 0)
{
smart_str_appendc(buf, '[');
}
else
{
smart_str_appendc(buf, '{');
}
i = myht ? zend_hash_num_elements(myht) : 0;
if (i > 0) {
zstr key;
zval **data;
ulong index;
uint key_len;
HashPosition pos;
HashTable *tmp_ht;
int need_comma = 0;
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) {
tmp_ht = HASH_OF(*data);
if (tmp_ht) {
tmp_ht->nApplyCount++;
}
if (r == 0) {
if (need_comma) {
smart_str_appendc(buf, ',');
} else {
need_comma = 1;
}
json_encode_r(buf, *data TSRMLS_CC);
} else if (r == 1) {
if (i == HASH_KEY_IS_STRING ||
i == HASH_KEY_IS_UNICODE) {
if (key.s[0] == '\0' && Z_TYPE_PP(val) == IS_OBJECT) {
/* Skip protected and private members. */
continue;
}
if (need_comma) {
smart_str_appendc(buf, ',');
} else {
need_comma = 1;
}
json_escape_string(buf, key, key_len - 1, (i==HASH_KEY_IS_UNICODE)?IS_UNICODE:IS_STRING);
smart_str_appendc(buf, ':');
json_encode_r(buf, *data TSRMLS_CC);
} else {
if (need_comma) {
smart_str_appendc(buf, ',');
} else {
need_comma = 1;
}
smart_str_appendc(buf, '"');
smart_str_append_long(buf, (long) index);
smart_str_appendc(buf, '"');
smart_str_appendc(buf, ':');
json_encode_r(buf, *data TSRMLS_CC);
}
}
if (tmp_ht) {
tmp_ht->nApplyCount--;
}
}
}
}
if (r == 0)
{
smart_str_appendc(buf, ']');
}
else
{
smart_str_appendc(buf, '}');
}
}
/* }}} */
#define REVERSE16(us) (((us & 0xf) << 12) | (((us >> 4) & 0xf) << 8) | (((us >> 8) & 0xf) << 4) | ((us >> 12) & 0xf))
static void json_escape_string(smart_str *buf, zstr s, int len, zend_uchar type) /* {{{ */
{
int pos = 0;
unsigned short us;
unsigned short *utf16;
if (len == 0)
{
smart_str_appendl(buf, "\"\"", 2);
return;
}
if (type == IS_UNICODE) {
utf16 = (unsigned short *) s.u;
} else {
utf16 = (unsigned short *) safe_emalloc(len, sizeof(unsigned short), 0);
len = utf8_to_utf16(utf16, s.s, len);
if (len <= 0)
{
if (utf16)
{
efree(utf16);
}
smart_str_appendl(buf, "\"\"", 2);
return;
}
}
smart_str_appendc(buf, '"');
while(pos < len)
{
us = utf16[pos++];
switch (us)
{
case '"':
{
smart_str_appendl(buf, "\\\"", 2);
}
break;
case '\\':
{
smart_str_appendl(buf, "\\\\", 2);
}
break;
case '/':
{
smart_str_appendl(buf, "\\/", 2);
}
break;
case '\b':
{
smart_str_appendl(buf, "\\b", 2);
}
break;
case '\f':
{
smart_str_appendl(buf, "\\f", 2);
}
break;
case '\n':
{
smart_str_appendl(buf, "\\n", 2);
}
break;
case '\r':
{
smart_str_appendl(buf, "\\r", 2);
}
break;
case '\t':
{
smart_str_appendl(buf, "\\t", 2);
}
break;
default:
{
if (us >= ' ' && (us & 127) == us)
{
smart_str_appendc(buf, (unsigned char) us);
}
else
{
smart_str_appendl(buf, "\\u", 2);
us = REVERSE16(us);
smart_str_appendc(buf, digits[us & ((1 << 4) - 1)]);
us >>= 4;
smart_str_appendc(buf, digits[us & ((1 << 4) - 1)]);
us >>= 4;
smart_str_appendc(buf, digits[us & ((1 << 4) - 1)]);
us >>= 4;
smart_str_appendc(buf, digits[us & ((1 << 4) - 1)]);
}
}
break;
}
}
smart_str_appendc(buf, '"');
if (type == IS_STRING) {
efree(utf16);
}
}
/* }}} */
static void json_encode_r(smart_str *buf, zval *val TSRMLS_DC) /* {{{ */
{
switch (Z_TYPE_P(val)) {
case IS_NULL:
smart_str_appendl(buf, "null", 4);
break;
case IS_BOOL:
if (Z_BVAL_P(val))
{
smart_str_appendl(buf, "true", 4);
}
else
{
smart_str_appendl(buf, "false", 5);
}
break;
case IS_LONG:
smart_str_append_long(buf, Z_LVAL_P(val));
break;
case IS_DOUBLE:
{
char *d = NULL;
int len;
double dbl = Z_DVAL_P(val);
if (!zend_isinf(dbl) && !zend_isnan(dbl)) {
len = spprintf(&d, 0, "%.*g", (int) EG(precision), dbl);
smart_str_appendl(buf, d, len);
efree(d);
} else {
zend_error(E_WARNING, "[json] (json_encode_r) double %.9g does not conform to the JSON spec, encoded as 0.", dbl);
smart_str_appendc(buf, '0');
}
}
break;
case IS_STRING:
case IS_UNICODE:
json_escape_string(buf, Z_UNIVAL_P(val), Z_UNILEN_P(val), Z_TYPE_P(val));
break;
case IS_ARRAY:
case IS_OBJECT:
json_encode_array(buf, &val TSRMLS_CC);
break;
default:
zend_error(E_WARNING, "[json] (json_encode_r) type is unsupported, encoded as null.");
smart_str_appendl(buf, "null", 4);
break;
}
return;
}
/* }}} */
/* {{{ proto string json_encode(mixed data) U
Returns the JSON representation of a value */
PHP_FUNCTION(json_encode)
{
zval *parameter;
smart_str buf = {0};
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z", &parameter) == FAILURE) {
return;
}
json_encode_r(&buf, parameter TSRMLS_CC);
/*
* Return as binary string, since the result is 99% likely to be just
* echo'ed out and we want to avoid overhead of double conversion.
*/
ZVAL_STRINGL(return_value, buf.c, buf.len, 1);
smart_str_free(&buf);
}
/* }}} */
/* {{{ proto mixed json_decode(string json [, bool assoc]) U
Decodes the JSON representation into a PHP value */
PHP_FUNCTION(json_decode)
{
zstr str;
int str_len, utf16_len;
zend_uchar str_type;
zend_bool assoc = 0; /* return JS objects as PHP objects by default */
zval *z;
unsigned short *utf16;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "t|b", &str, &str_len, &str_type, &assoc) == FAILURE) {
return;
}
if (!str_len)
{
RETURN_NULL();
}
if (str_type == IS_UNICODE) {
utf16 = str.u;
utf16_len = str_len;
} else {
utf16 = (unsigned short *) safe_emalloc((str_len+1), sizeof(unsigned short), 0);
utf16_len = utf8_to_utf16(utf16, str.s, str_len);
if (utf16_len <= 0)
{
if (utf16)
{
efree(utf16);
}
RETURN_NULL();
}
}
ALLOC_INIT_ZVAL(z);
if (JSON_parser(z, utf16, utf16_len, assoc TSRMLS_CC))
{
*return_value = *z;
FREE_ZVAL(z);
if (str_type == IS_STRING) {
efree(utf16);
}
} else if (str_type == IS_STRING) {
double d;
int type;
long p;
zval_dtor(z);
FREE_ZVAL(z);
efree(utf16);
if (str_len == 4) {
if (!strcasecmp(str.s, "null")) {
RETURN_NULL();
} else if (!strcasecmp(str.s, "true")) {
RETURN_BOOL(1);
}
} else if (str_len == 5 && !strcasecmp(str.s, "false")) {
RETURN_BOOL(0);
}
if ((type = is_numeric_string(str.s, str_len, &p, &d, 0)) != 0) {
if (type == IS_LONG) {
RETURN_LONG(p);
} else if (type == IS_DOUBLE) {
RETURN_DOUBLE(d);
}
}
if (*str.s == '"' || str.s[str_len] == '"') {
RETURN_STRINGL(str.s+1, str_len-2, 1);
} else {
RETURN_STRINGL(str.s, str_len, 1);
}
} else {
double d;
int type;
long p;
zval_dtor(z);
FREE_ZVAL(z);
if (str_len == 4) {
if (ZEND_U_CASE_EQUAL(IS_UNICODE, str, str_len, "null", sizeof("null")-1)) {
RETURN_NULL();
} else if (ZEND_U_CASE_EQUAL(IS_UNICODE, str, str_len, "true", sizeof("true")-1)) {
RETURN_BOOL(1);
}
} else if (str_len == 5 && ZEND_U_CASE_EQUAL(IS_UNICODE, str, str_len, "false", sizeof("false")-1)) {
RETURN_BOOL(0);
}
if ((type = is_numeric_unicode(str.u, str_len, &p, &d, 0)) != 0) {
if (type == IS_LONG) {
RETURN_LONG(p);
} else if (type == IS_DOUBLE) {
RETURN_DOUBLE(d);
}
}
if (*str.u == 0x22 /*'"'*/ || str.u[str_len] == 0x22 /*'"'*/) {
RETURN_UNICODEL(str.u+1, str_len-2, 1);
} else {
RETURN_UNICODEL(str.u, str_len, 1);
}
}
}
/* }}} */
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: noet sw=4 ts=4
* vim<600: noet sw=4 ts=4
*/
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