mirror of
https://github.com/php/php-src.git
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572 lines
14 KiB
C
572 lines
14 KiB
C
/*
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+----------------------------------------------------------------------+
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| PHP Version 7 |
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+----------------------------------------------------------------------+
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| Copyright (c) 1997-2017 The PHP Group |
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+----------------------------------------------------------------------+
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| This source file is subject to version 3.01 of the PHP license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| http://www.php.net/license/3_01.txt |
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| If you did not receive a copy of the PHP license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@php.net so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Author: Omar Kilani <omar@php.net> |
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| Jakub Zelenka <bukka@php.net> |
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+----------------------------------------------------------------------+
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "php.h"
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#include "php_ini.h"
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#include "ext/standard/info.h"
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#include "ext/standard/html.h"
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#include "zend_smart_str.h"
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#include "php_json.h"
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#include "php_json_encoder.h"
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#include <zend_exceptions.h>
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static const char digits[] = "0123456789abcdef";
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static int php_json_escape_string(
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smart_str *buf, char *s, size_t len,
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int options, php_json_encoder *encoder);
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static int php_json_determine_array_type(zval *val) /* {{{ */
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{
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int i;
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HashTable *myht = Z_ARRVAL_P(val);
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i = myht ? zend_hash_num_elements(myht) : 0;
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if (i > 0) {
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zend_string *key;
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zend_ulong index, idx;
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if (HT_IS_PACKED(myht) && HT_IS_WITHOUT_HOLES(myht)) {
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return PHP_JSON_OUTPUT_ARRAY;
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}
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idx = 0;
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ZEND_HASH_FOREACH_KEY(myht, index, key) {
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if (key) {
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return PHP_JSON_OUTPUT_OBJECT;
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} else {
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if (index != idx) {
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return PHP_JSON_OUTPUT_OBJECT;
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}
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}
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idx++;
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} ZEND_HASH_FOREACH_END();
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}
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return PHP_JSON_OUTPUT_ARRAY;
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}
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/* }}} */
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/* {{{ Pretty printing support functions */
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static inline void php_json_pretty_print_char(smart_str *buf, int options, char c) /* {{{ */
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{
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if (options & PHP_JSON_PRETTY_PRINT) {
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smart_str_appendc(buf, c);
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}
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}
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/* }}} */
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static inline void php_json_pretty_print_indent(smart_str *buf, int options, php_json_encoder *encoder) /* {{{ */
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{
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int i;
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if (options & PHP_JSON_PRETTY_PRINT) {
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for (i = 0; i < encoder->depth; ++i) {
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smart_str_appendl(buf, " ", 4);
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}
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}
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}
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/* }}} */
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/* }}} */
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static inline int php_json_is_valid_double(double d) /* {{{ */
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{
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return !zend_isinf(d) && !zend_isnan(d);
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}
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/* }}} */
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static inline void php_json_encode_double(smart_str *buf, double d, int options) /* {{{ */
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{
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size_t len;
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char num[PHP_DOUBLE_MAX_LENGTH];
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php_gcvt(d, (int)PG(serialize_precision), '.', 'e', num);
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len = strlen(num);
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if (options & PHP_JSON_PRESERVE_ZERO_FRACTION && strchr(num, '.') == NULL && len < PHP_DOUBLE_MAX_LENGTH - 2) {
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num[len++] = '.';
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num[len++] = '0';
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num[len] = '\0';
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}
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smart_str_appendl(buf, num, len);
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}
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/* }}} */
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#define PHP_JSON_HASH_PROTECT_RECURSION(_tmp_ht) \
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do { \
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if (_tmp_ht && !(GC_FLAGS(_tmp_ht) & GC_IMMUTABLE)) { \
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GC_PROTECT_RECURSION(_tmp_ht); \
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} \
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} while (0)
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#define PHP_JSON_HASH_UNPROTECT_RECURSION(_tmp_ht) \
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do { \
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if (_tmp_ht && !(GC_FLAGS(_tmp_ht) & GC_IMMUTABLE)) { \
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GC_UNPROTECT_RECURSION(_tmp_ht); \
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} \
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} while (0)
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static int php_json_encode_array(smart_str *buf, zval *val, int options, php_json_encoder *encoder) /* {{{ */
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{
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int i, r, need_comma = 0;
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HashTable *myht;
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if (Z_TYPE_P(val) == IS_ARRAY) {
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myht = Z_ARRVAL_P(val);
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r = (options & PHP_JSON_FORCE_OBJECT) ? PHP_JSON_OUTPUT_OBJECT : php_json_determine_array_type(val);
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} else {
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myht = Z_OBJPROP_P(val);
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r = PHP_JSON_OUTPUT_OBJECT;
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}
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if (myht && GC_IS_RECURSIVE(myht)) {
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encoder->error_code = PHP_JSON_ERROR_RECURSION;
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smart_str_appendl(buf, "null", 4);
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return FAILURE;
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}
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PHP_JSON_HASH_PROTECT_RECURSION(myht);
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if (r == PHP_JSON_OUTPUT_ARRAY) {
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smart_str_appendc(buf, '[');
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} else {
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smart_str_appendc(buf, '{');
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}
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++encoder->depth;
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i = myht ? zend_hash_num_elements(myht) : 0;
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if (i > 0) {
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zend_string *key;
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zval *data;
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zend_ulong index;
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ZEND_HASH_FOREACH_KEY_VAL_IND(myht, index, key, data) {
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if (r == PHP_JSON_OUTPUT_ARRAY) {
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if (need_comma) {
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smart_str_appendc(buf, ',');
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} else {
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need_comma = 1;
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}
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php_json_pretty_print_char(buf, options, '\n');
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php_json_pretty_print_indent(buf, options, encoder);
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} else if (r == PHP_JSON_OUTPUT_OBJECT) {
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if (key) {
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if (ZSTR_VAL(key)[0] == '\0' && ZSTR_LEN(key) > 0 && Z_TYPE_P(val) == IS_OBJECT) {
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/* Skip protected and private members. */
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continue;
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}
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if (need_comma) {
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smart_str_appendc(buf, ',');
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} else {
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need_comma = 1;
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}
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php_json_pretty_print_char(buf, options, '\n');
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php_json_pretty_print_indent(buf, options, encoder);
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if (php_json_escape_string(buf, ZSTR_VAL(key), ZSTR_LEN(key),
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options & ~PHP_JSON_NUMERIC_CHECK, encoder) == FAILURE &&
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(options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR) &&
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buf->s) {
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ZSTR_LEN(buf->s) -= 4;
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smart_str_appendl(buf, "\"\"", 2);
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}
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} else {
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if (need_comma) {
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smart_str_appendc(buf, ',');
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} else {
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need_comma = 1;
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}
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php_json_pretty_print_char(buf, options, '\n');
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php_json_pretty_print_indent(buf, options, encoder);
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smart_str_appendc(buf, '"');
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smart_str_append_long(buf, (zend_long) index);
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smart_str_appendc(buf, '"');
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}
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smart_str_appendc(buf, ':');
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php_json_pretty_print_char(buf, options, ' ');
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}
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if (php_json_encode_zval(buf, data, options, encoder) == FAILURE &&
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!(options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR)) {
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PHP_JSON_HASH_UNPROTECT_RECURSION(myht);
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return FAILURE;
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}
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} ZEND_HASH_FOREACH_END();
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}
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PHP_JSON_HASH_UNPROTECT_RECURSION(myht);
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if (encoder->depth > encoder->max_depth) {
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encoder->error_code = PHP_JSON_ERROR_DEPTH;
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if (!(options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR)) {
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return FAILURE;
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}
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}
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--encoder->depth;
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/* Only keep closing bracket on same line for empty arrays/objects */
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if (need_comma) {
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php_json_pretty_print_char(buf, options, '\n');
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php_json_pretty_print_indent(buf, options, encoder);
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}
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if (r == PHP_JSON_OUTPUT_ARRAY) {
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smart_str_appendc(buf, ']');
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} else {
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smart_str_appendc(buf, '}');
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}
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return SUCCESS;
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}
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/* }}} */
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static int php_json_escape_string(
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smart_str *buf, char *s, size_t len,
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int options, php_json_encoder *encoder) /* {{{ */
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{
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int status;
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unsigned int us;
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size_t pos, checkpoint;
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if (len == 0) {
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smart_str_appendl(buf, "\"\"", 2);
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return SUCCESS;
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}
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if (options & PHP_JSON_NUMERIC_CHECK) {
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double d;
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int type;
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zend_long p;
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if ((type = is_numeric_string(s, len, &p, &d, 0)) != 0) {
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if (type == IS_LONG) {
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smart_str_append_long(buf, p);
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return SUCCESS;
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} else if (type == IS_DOUBLE && php_json_is_valid_double(d)) {
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php_json_encode_double(buf, d, options);
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return SUCCESS;
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}
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}
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}
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pos = 0;
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checkpoint = buf->s ? ZSTR_LEN(buf->s) : 0;
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/* pre-allocate for string length plus 2 quotes */
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smart_str_alloc(buf, len+2, 0);
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smart_str_appendc(buf, '"');
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do {
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us = (unsigned char)s[pos];
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if (us >= 0x80) {
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int utf8_sub = 0;
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size_t prev_pos = pos;
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us = php_next_utf8_char((unsigned char *)s, len, &pos, &status);
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/* check whether UTF8 character is correct */
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if (status != SUCCESS) {
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if (options & PHP_JSON_INVALID_UTF8_IGNORE) {
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/* ignore invalid UTF8 character */
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continue;
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} else if (options & PHP_JSON_INVALID_UTF8_SUBSTITUTE) {
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/* Use Unicode character 'REPLACEMENT CHARACTER' (U+FFFD) */
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us = 0xfffd;
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utf8_sub = 1;
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} else {
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if (buf->s) {
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ZSTR_LEN(buf->s) = checkpoint;
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}
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encoder->error_code = PHP_JSON_ERROR_UTF8;
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if (options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR) {
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smart_str_appendl(buf, "null", 4);
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}
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return FAILURE;
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}
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}
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/* Escape U+2028/U+2029 line terminators, UNLESS both
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JSON_UNESCAPED_UNICODE and
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JSON_UNESCAPED_LINE_TERMINATORS were provided */
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if ((options & PHP_JSON_UNESCAPED_UNICODE)
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&& ((options & PHP_JSON_UNESCAPED_LINE_TERMINATORS)
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|| us < 0x2028 || us > 0x2029)) {
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if (utf8_sub) {
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smart_str_appendl(buf, "\xef\xbf\xbd", 3);
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} else {
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smart_str_appendl(buf, s + prev_pos, pos - prev_pos);
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}
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continue;
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}
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/* From http://en.wikipedia.org/wiki/UTF16 */
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if (us >= 0x10000) {
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unsigned int next_us;
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us -= 0x10000;
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next_us = (unsigned short)((us & 0x3ff) | 0xdc00);
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us = (unsigned short)((us >> 10) | 0xd800);
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smart_str_appendl(buf, "\\u", 2);
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smart_str_appendc(buf, digits[(us & 0xf000) >> 12]);
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smart_str_appendc(buf, digits[(us & 0xf00) >> 8]);
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smart_str_appendc(buf, digits[(us & 0xf0) >> 4]);
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smart_str_appendc(buf, digits[(us & 0xf)]);
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us = next_us;
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}
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smart_str_appendl(buf, "\\u", 2);
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smart_str_appendc(buf, digits[(us & 0xf000) >> 12]);
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smart_str_appendc(buf, digits[(us & 0xf00) >> 8]);
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smart_str_appendc(buf, digits[(us & 0xf0) >> 4]);
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smart_str_appendc(buf, digits[(us & 0xf)]);
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} else {
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static const uint32_t charmap[4] = {
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0xffffffff, 0x500080c4, 0x10000000, 0x00000000};
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pos++;
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if (EXPECTED(!(charmap[us >> 5] & (1 << (us & 0x1f))))) {
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smart_str_appendc(buf, (unsigned char) us);
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} else {
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switch (us) {
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case '"':
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if (options & PHP_JSON_HEX_QUOT) {
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smart_str_appendl(buf, "\\u0022", 6);
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} else {
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smart_str_appendl(buf, "\\\"", 2);
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}
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break;
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case '\\':
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smart_str_appendl(buf, "\\\\", 2);
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break;
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case '/':
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if (options & PHP_JSON_UNESCAPED_SLASHES) {
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smart_str_appendc(buf, '/');
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} else {
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smart_str_appendl(buf, "\\/", 2);
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}
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break;
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case '\b':
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smart_str_appendl(buf, "\\b", 2);
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break;
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case '\f':
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smart_str_appendl(buf, "\\f", 2);
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break;
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case '\n':
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smart_str_appendl(buf, "\\n", 2);
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break;
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case '\r':
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smart_str_appendl(buf, "\\r", 2);
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break;
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case '\t':
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smart_str_appendl(buf, "\\t", 2);
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break;
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case '<':
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if (options & PHP_JSON_HEX_TAG) {
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smart_str_appendl(buf, "\\u003C", 6);
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} else {
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smart_str_appendc(buf, '<');
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}
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break;
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case '>':
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if (options & PHP_JSON_HEX_TAG) {
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smart_str_appendl(buf, "\\u003E", 6);
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} else {
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smart_str_appendc(buf, '>');
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}
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break;
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case '&':
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if (options & PHP_JSON_HEX_AMP) {
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smart_str_appendl(buf, "\\u0026", 6);
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} else {
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smart_str_appendc(buf, '&');
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}
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break;
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case '\'':
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if (options & PHP_JSON_HEX_APOS) {
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smart_str_appendl(buf, "\\u0027", 6);
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} else {
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smart_str_appendc(buf, '\'');
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}
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break;
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default:
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ZEND_ASSERT(us < ' ');
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smart_str_appendl(buf, "\\u00", sizeof("\\u00")-1);
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smart_str_appendc(buf, digits[(us & 0xf0) >> 4]);
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smart_str_appendc(buf, digits[(us & 0xf)]);
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break;
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}
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}
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}
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} while (pos < len);
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smart_str_appendc(buf, '"');
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return SUCCESS;
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}
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/* }}} */
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static int php_json_encode_serializable_object(smart_str *buf, zval *val, int options, php_json_encoder *encoder) /* {{{ */
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{
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zend_class_entry *ce = Z_OBJCE_P(val);
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HashTable* myht = Z_OBJPROP_P(val);
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zval retval, fname;
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int return_code;
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if (myht && GC_IS_RECURSIVE(myht)) {
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encoder->error_code = PHP_JSON_ERROR_RECURSION;
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if (options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR) {
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smart_str_appendl(buf, "null", 4);
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}
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return FAILURE;
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}
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PHP_JSON_HASH_PROTECT_RECURSION(myht);
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ZVAL_STRING(&fname, "jsonSerialize");
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if (FAILURE == call_user_function_ex(EG(function_table), val, &fname, &retval, 0, NULL, 1, NULL) || Z_TYPE(retval) == IS_UNDEF) {
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if (!EG(exception)) {
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zend_throw_exception_ex(NULL, 0, "Failed calling %s::jsonSerialize()", ZSTR_VAL(ce->name));
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}
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zval_ptr_dtor(&fname);
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if (options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR) {
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smart_str_appendl(buf, "null", 4);
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}
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PHP_JSON_HASH_UNPROTECT_RECURSION(myht);
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return FAILURE;
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}
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|
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if (EG(exception)) {
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/* Error already raised */
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zval_ptr_dtor(&retval);
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zval_ptr_dtor(&fname);
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if (options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR) {
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smart_str_appendl(buf, "null", 4);
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}
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PHP_JSON_HASH_UNPROTECT_RECURSION(myht);
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return FAILURE;
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}
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|
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if ((Z_TYPE(retval) == IS_OBJECT) &&
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(Z_OBJ(retval) == Z_OBJ_P(val))) {
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/* Handle the case where jsonSerialize does: return $this; by going straight to encode array */
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PHP_JSON_HASH_UNPROTECT_RECURSION(myht);
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return_code = php_json_encode_array(buf, &retval, options, encoder);
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} else {
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/* All other types, encode as normal */
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return_code = php_json_encode_zval(buf, &retval, options, encoder);
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PHP_JSON_HASH_UNPROTECT_RECURSION(myht);
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}
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zval_ptr_dtor(&retval);
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zval_ptr_dtor(&fname);
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return return_code;
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}
|
|
/* }}} */
|
|
|
|
int php_json_encode_zval(smart_str *buf, zval *val, int options, php_json_encoder *encoder) /* {{{ */
|
|
{
|
|
again:
|
|
switch (Z_TYPE_P(val))
|
|
{
|
|
case IS_NULL:
|
|
smart_str_appendl(buf, "null", 4);
|
|
break;
|
|
|
|
case IS_TRUE:
|
|
smart_str_appendl(buf, "true", 4);
|
|
break;
|
|
case IS_FALSE:
|
|
smart_str_appendl(buf, "false", 5);
|
|
break;
|
|
|
|
case IS_LONG:
|
|
smart_str_append_long(buf, Z_LVAL_P(val));
|
|
break;
|
|
|
|
case IS_DOUBLE:
|
|
if (php_json_is_valid_double(Z_DVAL_P(val))) {
|
|
php_json_encode_double(buf, Z_DVAL_P(val), options);
|
|
} else {
|
|
encoder->error_code = PHP_JSON_ERROR_INF_OR_NAN;
|
|
smart_str_appendc(buf, '0');
|
|
}
|
|
break;
|
|
|
|
case IS_STRING:
|
|
return php_json_escape_string(buf, Z_STRVAL_P(val), Z_STRLEN_P(val), options, encoder);
|
|
|
|
case IS_OBJECT:
|
|
if (instanceof_function(Z_OBJCE_P(val), php_json_serializable_ce)) {
|
|
return php_json_encode_serializable_object(buf, val, options, encoder);
|
|
}
|
|
/* fallthrough -- Non-serializable object */
|
|
case IS_ARRAY:
|
|
return php_json_encode_array(buf, val, options, encoder);
|
|
|
|
case IS_REFERENCE:
|
|
val = Z_REFVAL_P(val);
|
|
goto again;
|
|
|
|
default:
|
|
encoder->error_code = PHP_JSON_ERROR_UNSUPPORTED_TYPE;
|
|
if (options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR) {
|
|
smart_str_appendl(buf, "null", 4);
|
|
}
|
|
return FAILURE;
|
|
}
|
|
|
|
return SUCCESS;
|
|
}
|
|
/* }}} */
|
|
|
|
/*
|
|
* Local variables:
|
|
* tab-width: 4
|
|
* c-basic-offset: 4
|
|
* End:
|
|
* vim600: noet sw=4 ts=4 fdm=marker
|
|
* vim<600: noet sw=4 ts=4
|
|
*/
|