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

Source
/*
  +----------------------------------------------------------------------+
  | 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
}

/* {{{ 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, const php_json_encoder *encoder) /* {{{ */
{
  if (options & PHP_JSON_PRETTY_PRINT) {
    for (int 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) /* {{{ */
{
  bool encode_as_object = options & PHP_JSON_FORCE_OBJECT;
  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;
    encode_as_object = encode_as_object || !zend_array_is_list(myht);
  } 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);
    const zend_class_entry *ce = obj->ce;

    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++) {
      zend_property_info *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;
      }
      zval *prop = OBJ_PROP(obj, prop_info->offset);
      if (Z_TYPE_P(prop) == IS_UNDEF) {
        continue;
      }

      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;
      }

      smart_str_appendc(buf, ',');
    }

    bool empty = ZSTR_VAL(buf->s)[ZSTR_LEN(buf->s) - 1] != ',';
    if (!empty) {
      /* Drop the trailing comma. */
      ZSTR_LEN(buf->s)--;
    }

    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 (!empty) {
      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;
    }
    encode_as_object = true;
  }

  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 (!encode_as_object) {
    smart_str_appendc(buf, '[');
  } else {
    smart_str_appendc(buf, '{');
  }

  ++encoder->depth;

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

  bool empty = true;
  if (i > 0) {
    zend_string *key;
    zval *data;
    zend_ulong index;

    ZEND_HASH_FOREACH_KEY_VAL_IND(myht, index, key, data) {
      bool need_dtor = false;
      zval tmp;
      ZVAL_UNDEF(&tmp);

      if (!encode_as_object) {
        ZEND_ASSERT(Z_TYPE_P(data) != IS_PTR);

        php_json_pretty_print_char(buf, options, '\n');
        php_json_pretty_print_indent(buf, options, encoder);
      } else {
        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;
            }
            need_dtor = true;
            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;
            }
          }


          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 {
          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;
      }
      if (UNEXPECTED(need_dtor)) {
        zval_ptr_dtor(&tmp);
      }

      smart_str_appendc(buf, ',');
    } ZEND_HASH_FOREACH_END();

    empty = ZSTR_VAL(buf->s)[ZSTR_LEN(buf->s) - 1] != ',';
    if (!empty) {
      /* Drop the trailing comma. */
      ZSTR_LEN(buf->s)--;
    }
  }

  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 (!empty) {
    php_json_pretty_print_char(buf, options, '\n');
    php_json_pretty_print_indent(buf, options, encoder);
  }

  if (!encode_as_object) {
    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) /* {{{ */
{
  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};

    unsigned int 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)
{
  const 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: 2025-12-14 06:05

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