/src/php-src/ext/json/json_encoder.c

Source (jump to first uncovered line)
/*
  +----------------------------------------------------------------------+
  | Copyright (c) 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:           |
  | https://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>                                   |
  |         Jakub Zelenka <bukka@php.net>                                |
  +----------------------------------------------------------------------+
*/

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "php.h"
#include "ext/standard/html.h"
#include "zend_smart_str.h"
#include "php_json.h"
#include "php_json_encoder.h"
#include "zend_portability.h"
#include <zend_exceptions.h>
#include "zend_enum.h"
#include "zend_property_hooks.h"
#include "zend_lazy_objects.h"

static const char digits[] = "0123456789abcdef";

static zend_always_inline bool php_json_check_stack_limit(void)
{
#ifdef ZEND_CHECK_STACK_LIMIT
  return zend_call_stack_overflowed(EG(stack_limit));
#else
  return false;
#endif
}

static int php_json_determine_array_type(zval *val) /* {{{ */
{
  zend_array *myht = Z_ARRVAL_P(val);

  if (myht) {
    return zend_array_is_list(myht) ? PHP_JSON_OUTPUT_ARRAY : PHP_JSON_OUTPUT_OBJECT;
  }

  return PHP_JSON_OUTPUT_ARRAY;
}
/* }}} */

/* {{{ Pretty printing support functions */

static inline void php_json_pretty_print_char(smart_str *buf, int options, char c) /* {{{ */
{
  if (options & PHP_JSON_PRETTY_PRINT) {
    smart_str_appendc(buf, c);
  }
}
/* }}} */

static inline void php_json_pretty_print_indent(smart_str *buf, int options, php_json_encoder *encoder) /* {{{ */
{
  int i;

  if (options & PHP_JSON_PRETTY_PRINT) {
    for (i = 0; i < encoder->depth; ++i) {
      smart_str_appendl(buf, "    ", 4);
    }
  }
}
/* }}} */

/* }}} */

static
#if defined(_MSC_VER) && defined(_M_ARM64)
// MSVC bug: https://developercommunity.visualstudio.com/t/corrupt-optimization-on-arm64-with-Ox-/10102551
zend_never_inline
#else
inline
#endif
bool php_json_is_valid_double(double d) /* {{{ */
{
  return !zend_isinf(d) && !zend_isnan(d);
}
/* }}} */

static inline void php_json_encode_double(smart_str *buf, double d, int options) /* {{{ */
{
  size_t len;
  char num[ZEND_DOUBLE_MAX_LENGTH];

  zend_gcvt(d, (int)PG(serialize_precision), '.', 'e', num);
  len = strlen(num);
  if (options & PHP_JSON_PRESERVE_ZERO_FRACTION && strchr(num, '.') == NULL && len < ZEND_DOUBLE_MAX_LENGTH - 2) {
    num[len++] = '.';
    num[len++] = '0';
    num[len] = '\0';
  }
  smart_str_appendl(buf, num, len);
}
/* }}} */

#define PHP_JSON_HASH_PROTECT_RECURSION(_tmp_ht) \
  do { \
    if (_tmp_ht) { \
      GC_TRY_PROTECT_RECURSION(_tmp_ht); \
    } \
  } while (0)

#define PHP_JSON_HASH_UNPROTECT_RECURSION(_tmp_ht) \
  do { \
    if (_tmp_ht) { \
      GC_TRY_UNPROTECT_RECURSION(_tmp_ht); \
    } \
  } while (0)

static zend_result php_json_encode_array(smart_str *buf, zval *val, int options, php_json_encoder *encoder) /* {{{ */
{
  int r, need_comma = 0;
  HashTable *myht, *prop_ht;
  zend_refcounted *recursion_rc;

  if (php_json_check_stack_limit()) {
    encoder->error_code = PHP_JSON_ERROR_DEPTH;
    if (options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR) {
      smart_str_appendl(buf, "null", 4);
    }
    return FAILURE;
  }

  if (Z_TYPE_P(val) == IS_ARRAY) {
    myht = Z_ARRVAL_P(val);
    recursion_rc = (zend_refcounted *)myht;
    prop_ht = NULL;
    r = (options & PHP_JSON_FORCE_OBJECT) ? PHP_JSON_OUTPUT_OBJECT : php_json_determine_array_type(val);
  } else if (Z_OBJ_P(val)->properties == NULL
   && Z_OBJ_HT_P(val)->get_properties_for == NULL
   && Z_OBJ_HT_P(val)->get_properties == zend_std_get_properties
   && Z_OBJ_P(val)->ce->num_hooked_props == 0
   && !zend_object_is_lazy(Z_OBJ_P(val))) {
    /* Optimized version without rebuilding properties HashTable */
    zend_object *obj = Z_OBJ_P(val);
    zend_class_entry *ce = obj->ce;
    zend_property_info *prop_info;
    zval *prop;

    if (GC_IS_RECURSIVE(obj)) {
      encoder->error_code = PHP_JSON_ERROR_RECURSION;
      smart_str_appendl(buf, "null", 4);
      return FAILURE;
    }

    PHP_JSON_HASH_PROTECT_RECURSION(obj);

    smart_str_appendc(buf, '{');

    ++encoder->depth;

    for (int i = 0; i < ce->default_properties_count; i++) {
      prop_info = ce->properties_info_table[i];
      if (!prop_info) {
        continue;
      }
      if (ZSTR_VAL(prop_info->name)[0] == '\0' && ZSTR_LEN(prop_info->name) > 0) {
        /* Skip protected and private members. */
        continue;
      }
      prop = OBJ_PROP(obj, prop_info->offset);
      if (Z_TYPE_P(prop) == IS_UNDEF) {
        continue;
      }

      if (need_comma) {
        smart_str_appendc(buf, ',');
      } else {
        need_comma = 1;
      }

      php_json_pretty_print_char(buf, options, '\n');
      php_json_pretty_print_indent(buf, options, encoder);

      if (php_json_escape_string(buf, ZSTR_VAL(prop_info->name), ZSTR_LEN(prop_info->name),
          options & ~PHP_JSON_NUMERIC_CHECK, encoder) == FAILURE &&
          (options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR) &&
          buf->s) {
        ZSTR_LEN(buf->s) -= 4;
        smart_str_appendl(buf, "\"\"", 2);
      }

      smart_str_appendc(buf, ':');
      php_json_pretty_print_char(buf, options, ' ');

      if (php_json_encode_zval(buf, prop, options, encoder) == FAILURE &&
          !(options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR)) {
        PHP_JSON_HASH_UNPROTECT_RECURSION(obj);
        return FAILURE;
      }
    }

    PHP_JSON_HASH_UNPROTECT_RECURSION(obj);
    if (encoder->depth > encoder->max_depth) {
      encoder->error_code = PHP_JSON_ERROR_DEPTH;
      if (!(options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR)) {
        return FAILURE;
      }
    }
    --encoder->depth;

    if (need_comma) {
      php_json_pretty_print_char(buf, options, '\n');
      php_json_pretty_print_indent(buf, options, encoder);
    }
    smart_str_appendc(buf, '}');
    return SUCCESS;
  } else {
    zend_object *obj = Z_OBJ_P(val);
    prop_ht = myht = zend_get_properties_for(val, ZEND_PROP_PURPOSE_JSON);
    if (obj->ce->num_hooked_props == 0) {
      recursion_rc = (zend_refcounted *)prop_ht;
    } else {
      /* Protecting the object itself is fine here because myht is temporary and can't be
       * referenced from a different place in the object graph. */
      recursion_rc = (zend_refcounted *)obj;
    }
    r = PHP_JSON_OUTPUT_OBJECT;
  }

  if (recursion_rc && GC_IS_RECURSIVE(recursion_rc)) {
    encoder->error_code = PHP_JSON_ERROR_RECURSION;
    smart_str_appendl(buf, "null", 4);
    zend_release_properties(prop_ht);
    return FAILURE;
  }

  PHP_JSON_HASH_PROTECT_RECURSION(recursion_rc);

  if (r == PHP_JSON_OUTPUT_ARRAY) {
    smart_str_appendc(buf, '[');
  } else {
    smart_str_appendc(buf, '{');
  }

  ++encoder->depth;

  uint32_t i = myht ? zend_hash_num_elements(myht) : 0;

  if (i > 0) {
    zend_string *key;
    zval *data;
    zend_ulong index;

    ZEND_HASH_FOREACH_KEY_VAL_IND(myht, index, key, data) {
      zval tmp;
      ZVAL_UNDEF(&tmp);

      if (r == PHP_JSON_OUTPUT_ARRAY) {
        ZEND_ASSERT(Z_TYPE_P(data) != IS_PTR);

        if (need_comma) {
          smart_str_appendc(buf, ',');
        } else {
          need_comma = 1;
        }

        php_json_pretty_print_char(buf, options, '\n');
        php_json_pretty_print_indent(buf, options, encoder);
      } else if (r == PHP_JSON_OUTPUT_OBJECT) {
        if (key) {
          if (ZSTR_VAL(key)[0] == '\0' && ZSTR_LEN(key) > 0 && Z_TYPE_P(val) == IS_OBJECT) {
            /* Skip protected and private members. */
            continue;
          }

          /* data is IS_PTR for properties with hooks. */
          if (UNEXPECTED(Z_TYPE_P(data) == IS_PTR)) {
            zend_property_info *prop_info = Z_PTR_P(data);
            if ((prop_info->flags & ZEND_ACC_VIRTUAL) && !prop_info->hooks[ZEND_PROPERTY_HOOK_GET]) {
              continue;
            }
            data = zend_read_property_ex(prop_info->ce, Z_OBJ_P(val), prop_info->name, /* silent */ true, &tmp);
            if (EG(exception)) {
              PHP_JSON_HASH_UNPROTECT_RECURSION(recursion_rc);
              zend_release_properties(prop_ht);
              return FAILURE;
            }
          }

          if (need_comma) {
            smart_str_appendc(buf, ',');
          } else {
            need_comma = 1;
          }

          php_json_pretty_print_char(buf, options, '\n');
          php_json_pretty_print_indent(buf, options, encoder);

          if (php_json_escape_string(buf, ZSTR_VAL(key), ZSTR_LEN(key),
                options & ~PHP_JSON_NUMERIC_CHECK, encoder) == FAILURE &&
              (options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR) &&
              buf->s) {
            ZSTR_LEN(buf->s) -= 4;
            smart_str_appendl(buf, "\"\"", 2);
          }
        } else {
          if (need_comma) {
            smart_str_appendc(buf, ',');
          } else {
            need_comma = 1;
          }

          php_json_pretty_print_char(buf, options, '\n');
          php_json_pretty_print_indent(buf, options, encoder);

          smart_str_appendc(buf, '"');
          smart_str_append_long(buf, (zend_long) index);
          smart_str_appendc(buf, '"');
        }

        smart_str_appendc(buf, ':');
        php_json_pretty_print_char(buf, options, ' ');
      }

      if (php_json_encode_zval(buf, data, options, encoder) == FAILURE &&
          !(options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR)) {
        PHP_JSON_HASH_UNPROTECT_RECURSION(recursion_rc);
        zend_release_properties(prop_ht);
        zval_ptr_dtor(&tmp);
        return FAILURE;
      }
      zval_ptr_dtor(&tmp);
    } ZEND_HASH_FOREACH_END();
  }

  PHP_JSON_HASH_UNPROTECT_RECURSION(recursion_rc);

  if (encoder->depth > encoder->max_depth) {
    encoder->error_code = PHP_JSON_ERROR_DEPTH;
    if (!(options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR)) {
      zend_release_properties(prop_ht);
      return FAILURE;
    }
  }
  --encoder->depth;

  /* Only keep closing bracket on same line for empty arrays/objects */
  if (need_comma) {
    php_json_pretty_print_char(buf, options, '\n');
    php_json_pretty_print_indent(buf, options, encoder);
  }

  if (r == PHP_JSON_OUTPUT_ARRAY) {
    smart_str_appendc(buf, ']');
  } else {
    smart_str_appendc(buf, '}');
  }

  zend_release_properties(prop_ht);
  return SUCCESS;
}
/* }}} */

zend_result php_json_escape_string(
    smart_str *buf, const char *s, size_t len,
    int options, php_json_encoder *encoder) /* {{{ */
{
  unsigned int us;
  size_t pos, checkpoint;
  char *dst;

  if (len == 0) {
    smart_str_appendl(buf, "\"\"", 2);
    return SUCCESS;
  }

  if (options & PHP_JSON_NUMERIC_CHECK) {
    double d;
    int type;
    zend_long p;

    if ((type = is_numeric_string(s, len, &p, &d, 0)) != 0) {
      if (type == IS_LONG) {
        smart_str_append_long(buf, p);
        return SUCCESS;
      } else if (type == IS_DOUBLE && php_json_is_valid_double(d)) {
        php_json_encode_double(buf, d, options);
        return SUCCESS;
      }
    }

  }
  checkpoint = buf->s ? ZSTR_LEN(buf->s) : 0;

  /* pre-allocate for string length plus 2 quotes */
  smart_str_alloc(buf, len+2, 0);
  smart_str_appendc(buf, '"');

  pos = 0;

  do {
    static const uint32_t charmap[8] = {
      0xffffffff, 0x500080c4, 0x10000000, 0x00000000,
      0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff};

    us = (unsigned char)s[pos];
    if (EXPECTED(!ZEND_BIT_TEST(charmap, us))) {
      pos++;
      len--;
      if (len == 0) {
        smart_str_appendl(buf, s, pos);
        break;
      }
    } else {
      if (pos) {
        smart_str_appendl(buf, s, pos);
        s += pos;
        pos = 0;
      }
      us = (unsigned char)s[0];
      if (UNEXPECTED(us >= 0x80)) {
        zend_result status;
        us = php_next_utf8_char((unsigned char *)s, len, &pos, &status);

        /* check whether UTF8 character is correct */
        if (UNEXPECTED(status != SUCCESS)) {
          if (options & PHP_JSON_INVALID_UTF8_IGNORE) {
            /* ignore invalid UTF8 character */
          } else if (options & PHP_JSON_INVALID_UTF8_SUBSTITUTE) {
            /* Use Unicode character 'REPLACEMENT CHARACTER' (U+FFFD) */
            if (options & PHP_JSON_UNESCAPED_UNICODE) {
              smart_str_appendl(buf, "\xef\xbf\xbd", 3);
            } else {
              smart_str_appendl(buf, "\\ufffd", 6);
            }
          } else {
            ZSTR_LEN(buf->s) = checkpoint;
            encoder->error_code = PHP_JSON_ERROR_UTF8;
            if (options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR) {
              smart_str_appendl(buf, "null", 4);
            }
            return FAILURE;
          }

        /* Escape U+2028/U+2029 line terminators, UNLESS both
           JSON_UNESCAPED_UNICODE and
           JSON_UNESCAPED_LINE_TERMINATORS were provided */
        } else if ((options & PHP_JSON_UNESCAPED_UNICODE)
            && ((options & PHP_JSON_UNESCAPED_LINE_TERMINATORS)
            || us < 0x2028 || us > 0x2029)) {
          smart_str_appendl(buf, s, pos);
        } else {
          /* From http://en.wikipedia.org/wiki/UTF16 */
          if (us >= 0x10000) {
            unsigned int next_us;

            us -= 0x10000;
            next_us = (unsigned short)((us & 0x3ff) | 0xdc00);
            us = (unsigned short)((us >> 10) | 0xd800);
            dst = smart_str_extend(buf, 6);
            dst[0] = '\\';
            dst[1] = 'u';
            dst[2] = digits[(us >> 12) & 0xf];
            dst[3] = digits[(us >> 8) & 0xf];
            dst[4] = digits[(us >> 4) & 0xf];
            dst[5] = digits[us & 0xf];
            us = next_us;
          }
          dst = smart_str_extend(buf, 6);
          dst[0] = '\\';
          dst[1] = 'u';
          dst[2] = digits[(us >> 12) & 0xf];
          dst[3] = digits[(us >> 8) & 0xf];
          dst[4] = digits[(us >> 4) & 0xf];
          dst[5] = digits[us & 0xf];
        }
        s += pos;
        len -= pos;
        pos = 0;
      } else {
        s++;
        switch (us) {
          case '"':
            if (options & PHP_JSON_HEX_QUOT) {
              smart_str_appendl(buf, "\\u0022", 6);
            } else {
              smart_str_appendl(buf, "\\\"", 2);
            }
            break;

          case '\\':
            smart_str_appendl(buf, "\\\\", 2);
            break;

          case '/':
            if (options & PHP_JSON_UNESCAPED_SLASHES) {
              smart_str_appendc(buf, '/');
            } else {
              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;

          case '<':
            if (options & PHP_JSON_HEX_TAG) {
              smart_str_appendl(buf, "\\u003C", 6);
            } else {
              smart_str_appendc(buf, '<');
            }
            break;

          case '>':
            if (options & PHP_JSON_HEX_TAG) {
              smart_str_appendl(buf, "\\u003E", 6);
            } else {
              smart_str_appendc(buf, '>');
            }
            break;

          case '&':
            if (options & PHP_JSON_HEX_AMP) {
              smart_str_appendl(buf, "\\u0026", 6);
            } else {
              smart_str_appendc(buf, '&');
            }
            break;

          case '\'':
            if (options & PHP_JSON_HEX_APOS) {
              smart_str_appendl(buf, "\\u0027", 6);
            } else {
              smart_str_appendc(buf, '\'');
            }
            break;

          default:
            ZEND_ASSERT(us < ' ');
            dst = smart_str_extend(buf, 6);
            dst[0] = '\\';
            dst[1] = 'u';
            dst[2] = '0';
            dst[3] = '0';
            dst[4] = digits[(us >> 4) & 0xf];
            dst[5] = digits[us & 0xf];
            break;
        }
        len--;
      }
    }
  } while (len);

  smart_str_appendc(buf, '"');

  return SUCCESS;
}
/* }}} */

static zend_result php_json_encode_serializable_object(smart_str *buf, zend_object *obj, int options, php_json_encoder *encoder)
{
  zend_class_entry *ce = obj->ce;
  uint32_t *guard = zend_get_recursion_guard(obj);
  zval retval;
  zend_result return_code;

  ZEND_ASSERT(guard != NULL);

  if (ZEND_GUARD_IS_RECURSIVE(guard, JSON)) {
    encoder->error_code = PHP_JSON_ERROR_RECURSION;
    if (options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR) {
      smart_str_appendl(buf, "null", 4);
    }
    return FAILURE;
  }

  ZEND_GUARD_PROTECT_RECURSION(guard, JSON);

  zend_function *json_serialize_method = zend_hash_str_find_ptr(&ce->function_table, ZEND_STRL("jsonserialize"));
  ZEND_ASSERT(json_serialize_method != NULL && "This should be guaranteed prior to calling this function");
  zend_call_known_function(json_serialize_method, obj, ce, &retval, 0, NULL, NULL);
  /* An exception has occurred */
  if (Z_TYPE(retval) == IS_UNDEF) {
    if (options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR) {
      smart_str_appendl(buf, "null", 4);
    }
    ZEND_GUARD_UNPROTECT_RECURSION(guard, JSON);
    return FAILURE;
  }

  if (Z_TYPE(retval) == IS_OBJECT && Z_OBJ(retval) == obj) {
    /* Handle the case where jsonSerialize does: return $this; by going straight to encode array */
    ZEND_GUARD_UNPROTECT_RECURSION(guard, JSON);
    return_code = php_json_encode_array(buf, &retval, options, encoder);
  } else {
    /* All other types, encode as normal */
    return_code = php_json_encode_zval(buf, &retval, options, encoder);
    ZEND_GUARD_UNPROTECT_RECURSION(guard, JSON);
  }

  zval_ptr_dtor(&retval);

  return return_code;
}

static zend_result php_json_encode_serializable_enum(smart_str *buf, zval *val, int options, php_json_encoder *encoder)
{
  zend_class_entry *ce = Z_OBJCE_P(val);
  if (ce->enum_backing_type == IS_UNDEF) {
    encoder->error_code = PHP_JSON_ERROR_NON_BACKED_ENUM;
    smart_str_appendc(buf, '0');
    return FAILURE;
  }

  zval *value_zv = zend_enum_fetch_case_value(Z_OBJ_P(val));
  return php_json_encode_zval(buf, value_zv, options, encoder);
}

zend_result 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, Z_OBJ_P(val), options, encoder);
      }
      if (Z_OBJCE_P(val)->ce_flags & ZEND_ACC_ENUM) {
        return php_json_encode_serializable_enum(buf, val, options, encoder);
      }
      /* fallthrough -- Non-serializable object */
      ZEND_FALLTHROUGH;
    case IS_ARRAY: {
      /* Avoid modifications (and potential freeing) of the array through a reference when a
       * jsonSerialize() method is invoked. */
      zval zv;
      zend_result res;
      ZVAL_COPY(&zv, val);
      res = php_json_encode_array(buf, &zv, options, encoder);
      zval_ptr_dtor_nogc(&zv);
      return res;
    }

    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;
}
/* }}} */

Coverage Report

Created: 2025-07-23 06:33

Line	Count	Source (jump to first uncovered line)
1		/*
2		+----------------------------------------------------------------------+
3		\| Copyright (c) The PHP Group \|
4		+----------------------------------------------------------------------+
5		\| This source file is subject to version 3.01 of the PHP license, \|
6		\| that is bundled with this package in the file LICENSE, and is \|
7		\| available through the world-wide-web at the following url: \|
8		\| https://www.php.net/license/3_01.txt \|
9		\| If you did not receive a copy of the PHP license and are unable to \|
10		\| obtain it through the world-wide-web, please send a note to \|
11		\| license@php.net so we can mail you a copy immediately. \|
12		+----------------------------------------------------------------------+
13		\| Author: Omar Kilani <omar@php.net> \|
14		\| Jakub Zelenka <bukka@php.net> \|
15		+----------------------------------------------------------------------+
16		*/
17
18		#ifdef HAVE_CONFIG_H
19		#include <config.h>
20		#endif
21
22		#include "php.h"
23		#include "ext/standard/html.h"
24		#include "zend_smart_str.h"
25		#include "php_json.h"
26		#include "php_json_encoder.h"
27		#include "zend_portability.h"
28		#include <zend_exceptions.h>
29		#include "zend_enum.h"
30		#include "zend_property_hooks.h"
31		#include "zend_lazy_objects.h"
32
33		static const char digits[] = "0123456789abcdef";
34
35		static zend_always_inline bool php_json_check_stack_limit(void)
36	443	{
37	443	#ifdef ZEND_CHECK_STACK_LIMIT
38	443	return zend_call_stack_overflowed(EG(stack_limit));
39		#else
40		return false;
41		#endif
42	443	}
43
44		static int php_json_determine_array_type(zval val) / {{{ */
45	49	{
46	49	zend_array *myht = Z_ARRVAL_P(val);
47
48	49	if (myht) {
49	49	return zend_array_is_list(myht) ? PHP_JSON_OUTPUT_ARRAY : PHP_JSON_OUTPUT_OBJECT;
50	49	}
51
52	0	return PHP_JSON_OUTPUT_ARRAY;
53	49	}
54		/* }}} */
55
56		/* {{{ Pretty printing support functions */
57
58		static inline void php_json_pretty_print_char(smart_str buf, int options, char c) / {{{ */
59	2.39k	{
60	2.39k	if (options & PHP_JSON_PRETTY_PRINT) {
61	700	smart_str_appendc(buf, c);
62	700	}
63	2.39k	}
64		/* }}} */
65
66		static inline void php_json_pretty_print_indent(smart_str buf, int options, php_json_encoder encoder) /* {{{ */
67	1.70k	{
68	1.70k	int i;
69
70	1.70k	if (options & PHP_JSON_PRETTY_PRINT) {
71	700	for (i = 0; i < encoder->depth; ++i) {
72	280	smart_str_appendl(buf, " ", 4);
73	280	}
74	420	}
75	1.70k	}
76		/* }}} */
77
78		/* }}} */
79
80		static
81		#if defined(_MSC_VER) && defined(_M_ARM64)
82		// MSVC bug: https://developercommunity.visualstudio.com/t/corrupt-optimization-on-arm64-with-Ox-/10102551
83		zend_never_inline
84		#else
85		inline
86		#endif
87		bool php_json_is_valid_double(double d) /* {{{ */
88	79	{
89	79	return !zend_isinf(d) && !zend_isnan(d);
90	79	}
91		/* }}} */
92
93		static inline void php_json_encode_double(smart_str buf, double d, int options) / {{{ */
94	79	{
95	79	size_t len;
96	79	char num[ZEND_DOUBLE_MAX_LENGTH];
97
98	79	zend_gcvt(d, (int)PG(serialize_precision), '.', 'e', num);
99	79	len = strlen(num);
100	79	if (options & PHP_JSON_PRESERVE_ZERO_FRACTION && strchr(num, '.') == NULL && len < ZEND_DOUBLE_MAX_LENGTH - 2) {
101	41	num[len++] = '.';
102	41	num[len++] = '0';
103	41	num[len] = '\0';
104	41	}
105	79	smart_str_appendl(buf, num, len);
106	79	}
107		/* }}} */
108
109		#define PHP_JSON_HASH_PROTECT_RECURSION(_tmp_ht) \
110	443	do { \
111	443	if (_tmp_ht) { \
112	438	GC_TRY_PROTECT_RECURSION(_tmp_ht); \
113	438	} \
114	443	} while (0)
115
116		#define PHP_JSON_HASH_UNPROTECT_RECURSION(_tmp_ht) \
117	443	do { \
118	443	if (_tmp_ht) { \
119	438	GC_TRY_UNPROTECT_RECURSION(_tmp_ht); \
120	438	} \
121	443	} while (0)
122
123		static zend_result php_json_encode_array(smart_str buf, zval val, int options, php_json_encoder encoder) / {{{ */
124	443	{
125	443	int r, need_comma = 0;
126	443	HashTable myht, prop_ht;
127	443	zend_refcounted *recursion_rc;
128
129	443	if (php_json_check_stack_limit()) {
130	0	encoder->error_code = PHP_JSON_ERROR_DEPTH;
131	0	if (options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR) {
132	0	smart_str_appendl(buf, "null", 4);
133	0	}
134	0	return FAILURE;
135	0	}
136
137	443	if (Z_TYPE_P(val) == IS_ARRAY) {
138	56	myht = Z_ARRVAL_P(val);
139	56	recursion_rc = (zend_refcounted *)myht;
140	56	prop_ht = NULL;
141	56	r = (options & PHP_JSON_FORCE_OBJECT) ? PHP_JSON_OUTPUT_OBJECT : php_json_determine_array_type(val);
142	387	} else if (Z_OBJ_P(val)->properties == NULL
143	387	&& Z_OBJ_HT_P(val)->get_properties_for == NULL
144	387	&& Z_OBJ_HT_P(val)->get_properties == zend_std_get_properties
145	387	&& Z_OBJ_P(val)->ce->num_hooked_props == 0
146	387	&& !zend_object_is_lazy(Z_OBJ_P(val))) {
147		/* Optimized version without rebuilding properties HashTable */
148	18	zend_object *obj = Z_OBJ_P(val);
149	18	zend_class_entry *ce = obj->ce;
150	18	zend_property_info *prop_info;
151	18	zval *prop;
152
153	18	if (GC_IS_RECURSIVE(obj)) {
154	0	encoder->error_code = PHP_JSON_ERROR_RECURSION;
155	0	smart_str_appendl(buf, "null", 4);
156	0	return FAILURE;
157	0	}
158
159	18	PHP_JSON_HASH_PROTECT_RECURSION(obj);
160
161	18	smart_str_appendc(buf, '{');
162
163	18	++encoder->depth;
164
165	18	for (int i = 0; i < ce->default_properties_count; i++) {
166	0	prop_info = ce->properties_info_table[i];
167	0	if (!prop_info) {
168	0	continue;
169	0	}
170	0	if (ZSTR_VAL(prop_info->name)[0] == '\0' && ZSTR_LEN(prop_info->name) > 0) {
171		/* Skip protected and private members. */
172	0	continue;
173	0	}
174	0	prop = OBJ_PROP(obj, prop_info->offset);
175	0	if (Z_TYPE_P(prop) == IS_UNDEF) {
176	0	continue;
177	0	}
178
179	0	if (need_comma) {
180	0	smart_str_appendc(buf, ',');
181	0	} else {
182	0	need_comma = 1;
183	0	}
184
185	0	php_json_pretty_print_char(buf, options, '\n');
186	0	php_json_pretty_print_indent(buf, options, encoder);
187
188	0	if (php_json_escape_string(buf, ZSTR_VAL(prop_info->name), ZSTR_LEN(prop_info->name),
189	0	options & ~PHP_JSON_NUMERIC_CHECK, encoder) == FAILURE &&
190	0	(options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR) &&
191	0	buf->s) {
192	0	ZSTR_LEN(buf->s) -= 4;
193	0	smart_str_appendl(buf, "\"\"", 2);
194	0	}
195
196	0	smart_str_appendc(buf, ':');
197	0	php_json_pretty_print_char(buf, options, ' ');
198
199	0	if (php_json_encode_zval(buf, prop, options, encoder) == FAILURE &&
200	0	!(options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR)) {
201	0	PHP_JSON_HASH_UNPROTECT_RECURSION(obj);
202	0	return FAILURE;
203	0	}
204	0	}
205
206	18	PHP_JSON_HASH_UNPROTECT_RECURSION(obj);
207	18	if (encoder->depth > encoder->max_depth) {
208	0	encoder->error_code = PHP_JSON_ERROR_DEPTH;
209	0	if (!(options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR)) {
210	0	return FAILURE;
211	0	}
212	0	}
213	18	--encoder->depth;
214
215	18	if (need_comma) {
216	0	php_json_pretty_print_char(buf, options, '\n');
217	0	php_json_pretty_print_indent(buf, options, encoder);
218	0	}
219	18	smart_str_appendc(buf, '}');
220	18	return SUCCESS;
221	369	} else {
222	369	zend_object *obj = Z_OBJ_P(val);
223	369	prop_ht = myht = zend_get_properties_for(val, ZEND_PROP_PURPOSE_JSON);
224	369	if (obj->ce->num_hooked_props == 0) {
225	223	recursion_rc = (zend_refcounted *)prop_ht;
226	223	} else {
227		/* Protecting the object itself is fine here because myht is temporary and can't be
228		* referenced from a different place in the object graph. */
229	146	recursion_rc = (zend_refcounted *)obj;
230	146	}
231	369	r = PHP_JSON_OUTPUT_OBJECT;
232	369	}
233
234	425	if (recursion_rc && GC_IS_RECURSIVE(recursion_rc)) {
235	0	encoder->error_code = PHP_JSON_ERROR_RECURSION;
236	0	smart_str_appendl(buf, "null", 4);
237	0	zend_release_properties(prop_ht);
238	0	return FAILURE;
239	0	}
240
241	425	PHP_JSON_HASH_PROTECT_RECURSION(recursion_rc);
242
243	425	if (r == PHP_JSON_OUTPUT_ARRAY) {
244	44	smart_str_appendc(buf, '[');
245	381	} else {
246	381	smart_str_appendc(buf, '{');
247	381	}
248
249	425	++encoder->depth;
250
251	425	uint32_t i = myht ? zend_hash_num_elements(myht) : 0;
252
253	425	if (i > 0) {
254	364	zend_string *key;
255	364	zval *data;
256	364	zend_ulong index;
257
258	5.98k	ZEND_HASH_FOREACH_KEY_VAL_IND(myht, index, key, data) {
259	5.98k	zval tmp;
260	5.98k	ZVAL_UNDEF(&tmp);
261
262	5.98k	if (r == PHP_JSON_OUTPUT_ARRAY) {
263	642	ZEND_ASSERT(Z_TYPE_P(data) != IS_PTR);
264
265	642	if (need_comma) {
266	612	smart_str_appendc(buf, ',');
267	612	} else {
268	30	need_comma = 1;
269	30	}
270
271	642	php_json_pretty_print_char(buf, options, '\n');
272	642	php_json_pretty_print_indent(buf, options, encoder);
273	2.16k	} else if (r == PHP_JSON_OUTPUT_OBJECT) {
274	2.16k	if (key) {
275	2.16k	if (ZSTR_VAL(key)[0] == '\0' && ZSTR_LEN(key) > 0 && Z_TYPE_P(val) == IS_OBJECT) {
276		/* Skip protected and private members. */
277	1.41k	continue;
278	1.41k	}
279
280		/* data is IS_PTR for properties with hooks. */
281	754	if (UNEXPECTED(Z_TYPE_P(data) == IS_PTR)) {
282	272	zend_property_info *prop_info = Z_PTR_P(data);
283	272	if ((prop_info->flags & ZEND_ACC_VIRTUAL) && !prop_info->hooks[ZEND_PROPERTY_HOOK_GET]) {
284	55	continue;
285	55	}
286	217	data = zend_read_property_ex(prop_info->ce, Z_OBJ_P(val), prop_info->name, /* silent */ true, &tmp);
287	217	if (EG(exception)) {
288	0	PHP_JSON_HASH_UNPROTECT_RECURSION(recursion_rc);
289	0	zend_release_properties(prop_ht);
290	0	return FAILURE;
291	0	}
292	217	}
293
294	699	if (need_comma) {
295	370	smart_str_appendc(buf, ',');
296	370	} else {
297	329	need_comma = 1;
298	329	}
299
300	699	php_json_pretty_print_char(buf, options, '\n');
301	699	php_json_pretty_print_indent(buf, options, encoder);
302
303	699	if (php_json_escape_string(buf, ZSTR_VAL(key), ZSTR_LEN(key),
304	699	options & ~PHP_JSON_NUMERIC_CHECK, encoder) == FAILURE &&
305	699	(options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR) &&
306	699	buf->s) {
307	0	ZSTR_LEN(buf->s) -= 4;
308	0	smart_str_appendl(buf, "\"\"", 2);
309	0	}
310	699	} else {
311	0	if (need_comma) {
312	0	smart_str_appendc(buf, ',');
313	0	} else {
314	0	need_comma = 1;
315	0	}
316
317	0	php_json_pretty_print_char(buf, options, '\n');
318	0	php_json_pretty_print_indent(buf, options, encoder);
319
320	0	smart_str_appendc(buf, '"');
321	0	smart_str_append_long(buf, (zend_long) index);
322	0	smart_str_appendc(buf, '"');
323	0	}
324
325	699	smart_str_appendc(buf, ':');
326	699	php_json_pretty_print_char(buf, options, ' ');
327	699	}
328
329	1.34k	if (php_json_encode_zval(buf, data, options, encoder) == FAILURE &&
330	1.34k	!(options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR)) {
331	0	PHP_JSON_HASH_UNPROTECT_RECURSION(recursion_rc);
332	0	zend_release_properties(prop_ht);
333	0	zval_ptr_dtor(&tmp);
334	0	return FAILURE;
335	0	}
336	1.34k	zval_ptr_dtor(&tmp);
337	1.34k	} ZEND_HASH_FOREACH_END();
338	364	}
339
340	425	PHP_JSON_HASH_UNPROTECT_RECURSION(recursion_rc);
341
342	425	if (encoder->depth > encoder->max_depth) {
343	0	encoder->error_code = PHP_JSON_ERROR_DEPTH;
344	0	if (!(options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR)) {
345	0	zend_release_properties(prop_ht);
346	0	return FAILURE;
347	0	}
348	0	}
349	425	--encoder->depth;
350
351		/* Only keep closing bracket on same line for empty arrays/objects */
352	425	if (need_comma) {
353	359	php_json_pretty_print_char(buf, options, '\n');
354	359	php_json_pretty_print_indent(buf, options, encoder);
355	359	}
356
357	425	if (r == PHP_JSON_OUTPUT_ARRAY) {
358	44	smart_str_appendc(buf, ']');
359	381	} else {
360	381	smart_str_appendc(buf, '}');
361	381	}
362
363	425	zend_release_properties(prop_ht);
364	425	return SUCCESS;
365	425	}
366		/* }}} */
367
368		zend_result php_json_escape_string(
369		smart_str buf, const char s, size_t len,
370		int options, php_json_encoder encoder) / {{{ */
371	1.83k	{
372	1.83k	unsigned int us;
373	1.83k	size_t pos, checkpoint;
374	1.83k	char *dst;
375
376	1.83k	if (len == 0) {
377	36	smart_str_appendl(buf, "\"\"", 2);
378	36	return SUCCESS;
379	36	}
380
381	1.80k	if (options & PHP_JSON_NUMERIC_CHECK) {
382	48	double d;
383	48	int type;
384	48	zend_long p;
385
386	48	if ((type = is_numeric_string(s, len, &p, &d, 0)) != 0) {
387	0	if (type == IS_LONG) {
388	0	smart_str_append_long(buf, p);
389	0	return SUCCESS;
390	0	} else if (type == IS_DOUBLE && php_json_is_valid_double(d)) {
391	0	php_json_encode_double(buf, d, options);
392	0	return SUCCESS;
393	0	}
394	0	}
395
396	48	}
397	1.80k	checkpoint = buf->s ? ZSTR_LEN(buf->s) : 0;
398
399		/* pre-allocate for string length plus 2 quotes */
400	1.80k	smart_str_alloc(buf, len+2, 0);
401	1.80k	smart_str_appendc(buf, '"');
402
403	1.80k	pos = 0;
404
405	341k	do {
406	341k	static const uint32_t charmap[8] = {
407	341k	0xffffffff, 0x500080c4, 0x10000000, 0x00000000,
408	341k	0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff};
409
410	341k	us = (unsigned char)s[pos];
411	341k	if (EXPECTED(!ZEND_BIT_TEST(charmap, us))) {
412	181k	pos++;
413	181k	len--;
414	181k	if (len == 0) {
415	1.74k	smart_str_appendl(buf, s, pos);
416	1.74k	break;
417	1.74k	}
418	181k	} else {
419	159k	if (pos) {
420	22.6k	smart_str_appendl(buf, s, pos);
421	22.6k	s += pos;
422	22.6k	pos = 0;
423	22.6k	}
424	159k	us = (unsigned char)s[0];
425	159k	if (UNEXPECTED(us >= 0x80)) {
426	81.9k	zend_result status;
427	81.9k	us = php_next_utf8_char((unsigned char *)s, len, &pos, &status);
428
429		/* check whether UTF8 character is correct */
430	81.9k	if (UNEXPECTED(status != SUCCESS)) {
431	81.6k	if (options & PHP_JSON_INVALID_UTF8_IGNORE) {
432		/* ignore invalid UTF8 character */
433	53.6k	} else if (options & PHP_JSON_INVALID_UTF8_SUBSTITUTE) {
434		/* Use Unicode character 'REPLACEMENT CHARACTER' (U+FFFD) */
435	53.6k	if (options & PHP_JSON_UNESCAPED_UNICODE) {
436	53.6k	smart_str_appendl(buf, "\xef\xbf\xbd", 3);
437	53.6k	} else {
438	0	smart_str_appendl(buf, "\\ufffd", 6);
439	0	}
440	53.6k	} else {
441	43	ZSTR_LEN(buf->s) = checkpoint;
442	43	encoder->error_code = PHP_JSON_ERROR_UTF8;
443	43	if (options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR) {
444	0	smart_str_appendl(buf, "null", 4);
445	0	}
446	43	return FAILURE;
447	43	}
448
449		/* Escape U+2028/U+2029 line terminators, UNLESS both
450		JSON_UNESCAPED_UNICODE and
451		JSON_UNESCAPED_LINE_TERMINATORS were provided */
452	81.6k	} else if ((options & PHP_JSON_UNESCAPED_UNICODE)
453	301	&& ((options & PHP_JSON_UNESCAPED_LINE_TERMINATORS)
454	301	\|\| us < 0x2028 \|\| us > 0x2029)) {
455	301	smart_str_appendl(buf, s, pos);
456	301	} else {
457		/* From http://en.wikipedia.org/wiki/UTF16 */
458	0	if (us >= 0x10000) {
459	0	unsigned int next_us;
460
461	0	us -= 0x10000;
462	0	next_us = (unsigned short)((us & 0x3ff) \| 0xdc00);
463	0	us = (unsigned short)((us >> 10) \| 0xd800);
464	0	dst = smart_str_extend(buf, 6);
465	0	dst[0] = '\\';
466	0	dst[1] = 'u';
467	0	dst[2] = digits[(us >> 12) & 0xf];
468	0	dst[3] = digits[(us >> 8) & 0xf];
469	0	dst[4] = digits[(us >> 4) & 0xf];
470	0	dst[5] = digits[us & 0xf];
471	0	us = next_us;
472	0	}
473	0	dst = smart_str_extend(buf, 6);
474	0	dst[0] = '\\';
475	0	dst[1] = 'u';
476	0	dst[2] = digits[(us >> 12) & 0xf];
477	0	dst[3] = digits[(us >> 8) & 0xf];
478	0	dst[4] = digits[(us >> 4) & 0xf];
479	0	dst[5] = digits[us & 0xf];
480	0	}
481	81.9k	s += pos;
482	81.9k	len -= pos;
483	81.9k	pos = 0;
484	81.9k	} else {
485	77.9k	s++;
486	77.9k	switch (us) {
487	1.91k	case '"':
488	1.91k	if (options & PHP_JSON_HEX_QUOT) {
489	178	smart_str_appendl(buf, "\\u0022", 6);
490	1.74k	} else {
491	1.74k	smart_str_appendl(buf, "\\\"", 2);
492	1.74k	}
493	1.91k	break;
494
495	1.36k	case '\\':
496	1.36k	smart_str_appendl(buf, "\\\\", 2);
497	1.36k	break;
498
499	1.55k	case '/':
500	1.55k	if (options & PHP_JSON_UNESCAPED_SLASHES) {
501	125	smart_str_appendc(buf, '/');
502	1.43k	} else {
503	1.43k	smart_str_appendl(buf, "\\/", 2);
504	1.43k	}
505	1.55k	break;
506
507	77	case '\b':
508	77	smart_str_appendl(buf, "\\b", 2);
509	77	break;
510
511	169	case '\f':
512	169	smart_str_appendl(buf, "\\f", 2);
513	169	break;
514
515	5.98k	case '\n':
516	5.98k	smart_str_appendl(buf, "\\n", 2);
517	5.98k	break;
518
519	3.88k	case '\r':
520	3.88k	smart_str_appendl(buf, "\\r", 2);
521	3.88k	break;
522
523	332	case '\t':
524	332	smart_str_appendl(buf, "\\t", 2);
525	332	break;
526
527	15.7k	case '<':
528	15.7k	if (options & PHP_JSON_HEX_TAG) {
529	8.53k	smart_str_appendl(buf, "\\u003C", 6);
530	8.53k	} else {
531	7.20k	smart_str_appendc(buf, '<');
532	7.20k	}
533	15.7k	break;
534
535	875	case '>':
536	875	if (options & PHP_JSON_HEX_TAG) {
537	103	smart_str_appendl(buf, "\\u003E", 6);
538	772	} else {
539	772	smart_str_appendc(buf, '>');
540	772	}
541	875	break;
542
543	62	case '&':
544	62	if (options & PHP_JSON_HEX_AMP) {
545	44	smart_str_appendl(buf, "\\u0026", 6);
546	44	} else {
547	18	smart_str_appendc(buf, '&');
548	18	}
549	62	break;
550
551	26	case '\'':
552	26	if (options & PHP_JSON_HEX_APOS) {
553	18	smart_str_appendl(buf, "\\u0027", 6);
554	18	} else {
555	8	smart_str_appendc(buf, '\'');
556	8	}
557	26	break;
558
559	45.9k	default:
560	45.9k	ZEND_ASSERT(us < ' ');
561	45.9k	dst = smart_str_extend(buf, 6);
562	45.9k	dst[0] = '\\';
563	45.9k	dst[1] = 'u';
564	45.9k	dst[2] = '0';
565	45.9k	dst[3] = '0';
566	45.9k	dst[4] = digits[(us >> 4) & 0xf];
567	45.9k	dst[5] = digits[us & 0xf];
568	45.9k	break;
569	77.9k	}
570	77.9k	len--;
571	77.9k	}
572	159k	}
573	341k	} while (len);
574
575	1.75k	smart_str_appendc(buf, '"');
576
577	1.75k	return SUCCESS;
578	1.80k	}
579		/* }}} */
580
581		static zend_result php_json_encode_serializable_object(smart_str buf, zend_object obj, int options, php_json_encoder *encoder)
582	18	{
583	18	zend_class_entry *ce = obj->ce;
584	18	uint32_t *guard = zend_get_recursion_guard(obj);
585	18	zval retval;
586	18	zend_result return_code;
587
588	18	ZEND_ASSERT(guard != NULL);
589
590	18	if (ZEND_GUARD_IS_RECURSIVE(guard, JSON)) {
591	0	encoder->error_code = PHP_JSON_ERROR_RECURSION;
592	0	if (options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR) {
593	0	smart_str_appendl(buf, "null", 4);
594	0	}
595	0	return FAILURE;
596	0	}
597
598	18	ZEND_GUARD_PROTECT_RECURSION(guard, JSON);
599
600	18	zend_function *json_serialize_method = zend_hash_str_find_ptr(&ce->function_table, ZEND_STRL("jsonserialize"));
601	18	ZEND_ASSERT(json_serialize_method != NULL && "This should be guaranteed prior to calling this function");
602	18	zend_call_known_function(json_serialize_method, obj, ce, &retval, 0, NULL, NULL);
603		/* An exception has occurred */
604	18	if (Z_TYPE(retval) == IS_UNDEF) {
605	3	if (options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR) {
606	0	smart_str_appendl(buf, "null", 4);
607	0	}
608	3	ZEND_GUARD_UNPROTECT_RECURSION(guard, JSON);
609	3	return FAILURE;
610	3	}
611
612	15	if (Z_TYPE(retval) == IS_OBJECT && Z_OBJ(retval) == obj) {
613		/* Handle the case where jsonSerialize does: return $this; by going straight to encode array */
614	0	ZEND_GUARD_UNPROTECT_RECURSION(guard, JSON);
615	0	return_code = php_json_encode_array(buf, &retval, options, encoder);
616	15	} else {
617		/* All other types, encode as normal */
618	15	return_code = php_json_encode_zval(buf, &retval, options, encoder);
619	15	ZEND_GUARD_UNPROTECT_RECURSION(guard, JSON);
620	15	}
621
622	15	zval_ptr_dtor(&retval);
623
624	15	return return_code;
625	18	}
626
627		static zend_result php_json_encode_serializable_enum(smart_str buf, zval val, int options, php_json_encoder *encoder)
628	294	{
629	294	zend_class_entry *ce = Z_OBJCE_P(val);
630	294	if (ce->enum_backing_type == IS_UNDEF) {
631	104	encoder->error_code = PHP_JSON_ERROR_NON_BACKED_ENUM;
632	104	smart_str_appendc(buf, '0');
633	104	return FAILURE;
634	104	}
635
636	190	zval *value_zv = zend_enum_fetch_case_value(Z_OBJ_P(val));
637	190	return php_json_encode_zval(buf, value_zv, options, encoder);
638	294	}
639
640		zend_result php_json_encode_zval(smart_str buf, zval val, int options, php_json_encoder encoder) / {{{ */
641	3.94k	{
642	3.96k	again:
643	3.96k	switch (Z_TYPE_P(val))
644	3.96k	{
645	150	case IS_NULL:
646	150	smart_str_appendl(buf, "null", 4);
647	150	break;
648
649	307	case IS_TRUE:
650	307	smart_str_appendl(buf, "true", 4);
651	307	break;
652	318	case IS_FALSE:
653	318	smart_str_appendl(buf, "false", 5);
654	318	break;
655
656	1.19k	case IS_LONG:
657	1.19k	smart_str_append_long(buf, Z_LVAL_P(val));
658	1.19k	break;
659
660	79	case IS_DOUBLE:
661	79	if (php_json_is_valid_double(Z_DVAL_P(val))) {
662	79	php_json_encode_double(buf, Z_DVAL_P(val), options);
663	79	} else {
664	0	encoder->error_code = PHP_JSON_ERROR_INF_OR_NAN;
665	0	smart_str_appendc(buf, '0');
666	0	}
667	79	break;
668
669	1.13k	case IS_STRING:
670	1.13k	return php_json_escape_string(buf, Z_STRVAL_P(val), Z_STRLEN_P(val), options, encoder);
671
672	699	case IS_OBJECT:
673	699	if (instanceof_function(Z_OBJCE_P(val), php_json_serializable_ce)) {
674	18	return php_json_encode_serializable_object(buf, Z_OBJ_P(val), options, encoder);
675	18	}
676	681	if (Z_OBJCE_P(val)->ce_flags & ZEND_ACC_ENUM) {
677	294	return php_json_encode_serializable_enum(buf, val, options, encoder);
678	294	}
679		/* fallthrough -- Non-serializable object */
680	387	ZEND_FALLTHROUGH;
681	443	case IS_ARRAY: {
682		/* Avoid modifications (and potential freeing) of the array through a reference when a
683		* jsonSerialize() method is invoked. */
684	443	zval zv;
685	443	zend_result res;
686	443	ZVAL_COPY(&zv, val);
687	443	res = php_json_encode_array(buf, &zv, options, encoder);
688	443	zval_ptr_dtor_nogc(&zv);
689	443	return res;
690	387	}
691
692	23	case IS_REFERENCE:
693	23	val = Z_REFVAL_P(val);
694	23	goto again;
695
696	0	default:
697	0	encoder->error_code = PHP_JSON_ERROR_UNSUPPORTED_TYPE;
698	0	if (options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR) {
699	0	smart_str_appendl(buf, "null", 4);
700	0	}
701	0	return FAILURE;
702	3.96k	}
703
704	2.05k	return SUCCESS;
705	3.96k	}
706		/* }}} */