/src/php-src/Zend/zend_operators.c

Source
/*
   +----------------------------------------------------------------------+
   | Zend Engine                                                          |
   +----------------------------------------------------------------------+
   | Copyright © Zend Technologies Ltd., a subsidiary company of          |
   |     Perforce Software, Inc., and Contributors.                       |
   +----------------------------------------------------------------------+
   | This source file is subject to the Modified BSD License that is      |
   | bundled with this package in the file LICENSE, and is available      |
   | through the World Wide Web at <https://www.php.net/license/>.        |
   |                                                                      |
   | SPDX-License-Identifier: BSD-3-Clause                                |
   +----------------------------------------------------------------------+
   | Authors: Andi Gutmans <andi@php.net>                                 |
   |          Zeev Suraski <zeev@php.net>                                 |
   |          Dmitry Stogov <dmitry@php.net>                              |
   +----------------------------------------------------------------------+
*/

#include <ctype.h>

#include "zend.h"
#include "zend_operators.h"
#include "zend_variables.h"
#include "zend_globals.h"
#include "zend_list.h"
#include "zend_API.h"
#include "zend_strtod.h"
#include "zend_exceptions.h"
#include "zend_closures.h"

#include <locale.h>
#ifdef HAVE_LANGINFO_H
# include <langinfo.h>
#endif

#ifdef ZEND_INTRIN_AVX2_NATIVE
#include <immintrin.h>
#endif
#ifdef __SSE2__
#include <emmintrin.h>
#endif
#if defined(__aarch64__) || defined(_M_ARM64)
#include <arm_neon.h>
#endif

#if defined(ZEND_WIN32) && !defined(ZTS) && defined(_MSC_VER)
/* This performance improvement of tolower() on Windows gives 10-18% on bench.php */
#define ZEND_USE_TOLOWER_L 1
#endif

#ifdef ZEND_USE_TOLOWER_L
static _locale_t current_locale = NULL;
/* this is true global! may lead to strange effects on ZTS, but so may setlocale() */
#define zend_tolower(c) _tolower_l(c, current_locale)
#else
#define zend_tolower(c) tolower(c)
#endif

#define TYPE_PAIR(t1,t2) (((t1) << 4) | (t2))

#ifdef ZEND_INTRIN_AVX2_NATIVE
#define HAVE_BLOCKCONV

#define BLOCKCONV_INIT_RANGE(start, end) \
  const __m256i blconv_offset = _mm256_set1_epi8((signed char)(SCHAR_MIN - start)); \
  const __m256i blconv_threshold = _mm256_set1_epi8(SCHAR_MIN + (end - start) + 1);

#define BLOCKCONV_STRIDE sizeof(__m256i)

#define BLOCKCONV_INIT_DELTA(delta) \
  const __m256i blconv_delta = _mm256_set1_epi8(delta);

#define BLOCKCONV_LOAD(input) \
  __m256i blconv_operand = _mm256_loadu_si256((__m256i*)(input)); \
  __m256i blconv_mask = _mm256_cmpgt_epi8(blconv_threshold, _mm256_add_epi8(blconv_operand, blconv_offset));

#define BLOCKCONV_FOUND() _mm256_movemask_epi8(blconv_mask)

#define BLOCKCONV_STORE(dest) \
  __m256i blconv_add = _mm256_and_si256(blconv_mask, blconv_delta); \
  __m256i blconv_result = _mm256_add_epi8(blconv_operand, blconv_add); \
  _mm256_storeu_si256((__m256i*)(dest), blconv_result);

#elif __SSE2__
#define HAVE_BLOCKCONV

/* Common code for SSE2 accelerated character case conversion */

#define BLOCKCONV_INIT_RANGE(start, end) \
  const __m128i blconv_offset = _mm_set1_epi8((signed char)(SCHAR_MIN - start)); \
  const __m128i blconv_threshold = _mm_set1_epi8(SCHAR_MIN + (end - start) + 1);

#define BLOCKCONV_STRIDE sizeof(__m128i)

#define BLOCKCONV_INIT_DELTA(delta) \
  const __m128i blconv_delta = _mm_set1_epi8(delta);

#define BLOCKCONV_LOAD(input) \
  __m128i blconv_operand = _mm_loadu_si128((__m128i*)(input)); \
  __m128i blconv_mask = _mm_cmplt_epi8(_mm_add_epi8(blconv_operand, blconv_offset), blconv_threshold);

#define BLOCKCONV_FOUND() _mm_movemask_epi8(blconv_mask)

#define BLOCKCONV_STORE(dest) \
  __m128i blconv_add = _mm_and_si128(blconv_mask, blconv_delta); \
  __m128i blconv_result = _mm_add_epi8(blconv_operand, blconv_add); \
  _mm_storeu_si128((__m128i *)(dest), blconv_result);

#elif defined(__aarch64__) || defined(_M_ARM64)
#define HAVE_BLOCKCONV

#define BLOCKCONV_INIT_RANGE(start, end) \
  const int8x16_t blconv_offset = vdupq_n_s8((signed char)(SCHAR_MIN - start)); \
  const int8x16_t blconv_threshold = vdupq_n_s8(SCHAR_MIN + (end - start) + 1);

#define BLOCKCONV_STRIDE sizeof(int8x16_t)

#define BLOCKCONV_INIT_DELTA(delta) \
  const int8x16_t blconv_delta = vdupq_n_s8(delta);

#define BLOCKCONV_LOAD(input) \
  int8x16_t blconv_operand = vld1q_s8((const int8_t*)(input)); \
  uint8x16_t blconv_mask = vcltq_s8(vreinterpretq_s8_u8(vaddq_u8(vreinterpretq_u8_s8(blconv_operand), vreinterpretq_u8_s8(blconv_offset))), blconv_threshold);

#define BLOCKCONV_FOUND() vmaxvq_u8(blconv_mask)

#define BLOCKCONV_STORE(dest) \
  int8x16_t blconv_add = vandq_s8(vreinterpretq_s8_u8(blconv_mask), blconv_delta); \
  int8x16_t blconv_result = vaddq_s8(blconv_operand, blconv_add); \
  vst1q_s8((int8_t *)(dest), blconv_result);

#endif /* defined(__aarch64__) || defined(_M_ARM64) */

ZEND_API const unsigned char zend_tolower_map[256] = {
0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f,
0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1a,0x1b,0x1c,0x1d,0x1e,0x1f,
0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27,0x28,0x29,0x2a,0x2b,0x2c,0x2d,0x2e,0x2f,
0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x3a,0x3b,0x3c,0x3d,0x3e,0x3f,
0x40,0x61,0x62,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6a,0x6b,0x6c,0x6d,0x6e,0x6f,
0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7a,0x5b,0x5c,0x5d,0x5e,0x5f,
0x60,0x61,0x62,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6a,0x6b,0x6c,0x6d,0x6e,0x6f,
0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7a,0x7b,0x7c,0x7d,0x7e,0x7f,
0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8a,0x8b,0x8c,0x8d,0x8e,0x8f,
0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9a,0x9b,0x9c,0x9d,0x9e,0x9f,
0xa0,0xa1,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7,0xa8,0xa9,0xaa,0xab,0xac,0xad,0xae,0xaf,
0xb0,0xb1,0xb2,0xb3,0xb4,0xb5,0xb6,0xb7,0xb8,0xb9,0xba,0xbb,0xbc,0xbd,0xbe,0xbf,
0xc0,0xc1,0xc2,0xc3,0xc4,0xc5,0xc6,0xc7,0xc8,0xc9,0xca,0xcb,0xcc,0xcd,0xce,0xcf,
0xd0,0xd1,0xd2,0xd3,0xd4,0xd5,0xd6,0xd7,0xd8,0xd9,0xda,0xdb,0xdc,0xdd,0xde,0xdf,
0xe0,0xe1,0xe2,0xe3,0xe4,0xe5,0xe6,0xe7,0xe8,0xe9,0xea,0xeb,0xec,0xed,0xee,0xef,
0xf0,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,0xfe,0xff
};

ZEND_API const unsigned char zend_toupper_map[256] = {
0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f,
0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1a,0x1b,0x1c,0x1d,0x1e,0x1f,
0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27,0x28,0x29,0x2a,0x2b,0x2c,0x2d,0x2e,0x2f,
0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x3a,0x3b,0x3c,0x3d,0x3e,0x3f,
0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4a,0x4b,0x4c,0x4d,0x4e,0x4f,
0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57,0x58,0x59,0x5a,0x5b,0x5c,0x5d,0x5e,0x5f,
0x60,0x41,0x42,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4a,0x4b,0x4c,0x4d,0x4e,0x4f,
0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57,0x58,0x59,0x5a,0x7b,0x7c,0x7d,0x7e,0x7f,
0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8a,0x8b,0x8c,0x8d,0x8e,0x8f,
0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9a,0x9b,0x9c,0x9d,0x9e,0x9f,
0xa0,0xa1,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7,0xa8,0xa9,0xaa,0xab,0xac,0xad,0xae,0xaf,
0xb0,0xb1,0xb2,0xb3,0xb4,0xb5,0xb6,0xb7,0xb8,0xb9,0xba,0xbb,0xbc,0xbd,0xbe,0xbf,
0xc0,0xc1,0xc2,0xc3,0xc4,0xc5,0xc6,0xc7,0xc8,0xc9,0xca,0xcb,0xcc,0xcd,0xce,0xcf,
0xd0,0xd1,0xd2,0xd3,0xd4,0xd5,0xd6,0xd7,0xd8,0xd9,0xda,0xdb,0xdc,0xdd,0xde,0xdf,
0xe0,0xe1,0xe2,0xe3,0xe4,0xe5,0xe6,0xe7,0xe8,0xe9,0xea,0xeb,0xec,0xed,0xee,0xef,
0xf0,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,0xfe,0xff
};


/**
 * Functions using locale lowercase:
    zend_binary_strncasecmp_l
    zend_binary_strcasecmp_l
 * Functions using ascii lowercase:
    string_compare_function_ex
    string_case_compare_function
      zend_str_tolower_copy
    zend_str_tolower_dup
    zend_str_tolower
    zend_binary_strcasecmp
    zend_binary_strncasecmp
 */

static zend_long ZEND_FASTCALL zend_atol_internal(const char *str, size_t str_len) /* {{{ */
{
  if (!str_len) {
    str_len = strlen(str);
  }

  /* Perform following multiplications on unsigned to avoid overflow UB.
   * For now overflow is silently ignored -- not clear what else can be
   * done here, especially as the final result of this function may be
   * used in an unsigned context (e.g. "memory_limit=3G", which overflows
   * zend_long on 32-bit, but not size_t). */
  zend_ulong retval = (zend_ulong) ZEND_STRTOL(str, NULL, 0);
  if (str_len>0) {
    switch (str[str_len-1]) {
      case 'g':
      case 'G':
        retval *= 1024;
        ZEND_FALLTHROUGH;
      case 'm':
      case 'M':
        retval *= 1024;
        ZEND_FALLTHROUGH;
      case 'k':
      case 'K':
        retval *= 1024;
        break;
    }
  }
  return (zend_long) retval;
}
/* }}} */

ZEND_API zend_long ZEND_FASTCALL zend_atol(const char *str, size_t str_len)
{
  return zend_atol_internal(str, str_len);
}

ZEND_API int ZEND_FASTCALL zend_atoi(const char *str, size_t str_len)
{
  return (int) zend_atol_internal(str, str_len);
}

/* {{{ convert_object_to_type: dst will be either ctype or UNDEF */
#define convert_object_to_type(op, dst, ctype)                  \
  ZVAL_UNDEF(dst);                                    \
  if (Z_OBJ_HT_P(op)->cast_object(Z_OBJ_P(op), dst, ctype) == FAILURE) {         \
    zend_error(E_WARNING,                               \
      "Object of class %s could not be converted to %s", ZSTR_VAL(Z_OBJCE_P(op)->name),\
    zend_get_type_by_const(ctype));                           \
  }                                            \

/* }}} */

ZEND_API void ZEND_FASTCALL convert_scalar_to_number(zval *op) /* {{{ */
{
try_again:
  switch (Z_TYPE_P(op)) {
    case IS_REFERENCE:
      zend_unwrap_reference(op);
      goto try_again;
    case IS_STRING:
      {
        zend_string *str;

        str = Z_STR_P(op);
        if ((Z_TYPE_INFO_P(op)=is_numeric_string(ZSTR_VAL(str), ZSTR_LEN(str), &Z_LVAL_P(op), &Z_DVAL_P(op), 1)) == 0) {
          ZVAL_LONG(op, 0);
        }
        zend_string_release_ex(str, 0);
        break;
      }
    case IS_NULL:
    case IS_FALSE:
      ZVAL_LONG(op, 0);
      break;
    case IS_TRUE:
      ZVAL_LONG(op, 1);
      break;
    case IS_RESOURCE:
      {
        zend_long l = Z_RES_HANDLE_P(op);
        zval_ptr_dtor(op);
        ZVAL_LONG(op, l);
      }
      break;
    case IS_OBJECT:
      {
        zval dst;

        convert_object_to_type(op, &dst, _IS_NUMBER);
        zval_ptr_dtor(op);

        if (Z_TYPE(dst) == IS_LONG || Z_TYPE(dst) == IS_DOUBLE) {
          ZVAL_COPY_VALUE(op, &dst);
        } else {
          ZVAL_LONG(op, 1);
        }
      }
      break;
  }
}
/* }}} */

static zend_never_inline zval* ZEND_FASTCALL _zendi_convert_scalar_to_number_silent(zval *op, zval *holder) /* {{{ */
{
  switch (Z_TYPE_P(op)) {
    case IS_NULL:
    case IS_FALSE:
      ZVAL_LONG(holder, 0);
      return holder;
    case IS_TRUE:
      ZVAL_LONG(holder, 1);
      return holder;
    case IS_STRING:
      if ((Z_TYPE_INFO_P(holder) = is_numeric_string(Z_STRVAL_P(op), Z_STRLEN_P(op), &Z_LVAL_P(holder), &Z_DVAL_P(holder), 1)) == 0) {
        ZVAL_LONG(holder, 0);
      }
      return holder;
    case IS_RESOURCE:
      ZVAL_LONG(holder, Z_RES_HANDLE_P(op));
      return holder;
    case IS_OBJECT:
      convert_object_to_type(op, holder, _IS_NUMBER);
      if (UNEXPECTED(EG(exception)) ||
          UNEXPECTED(Z_TYPE_P(holder) != IS_LONG && Z_TYPE_P(holder) != IS_DOUBLE)) {
        ZVAL_LONG(holder, 1);
      }
      return holder;
    case IS_LONG:
    case IS_DOUBLE:
    default:
      return op;
  }
}
/* }}} */

static zend_never_inline zend_result ZEND_FASTCALL _zendi_try_convert_scalar_to_number(zval *op, zval *holder) /* {{{ */
{
  switch (Z_TYPE_P(op)) {
    case IS_NULL:
    case IS_FALSE:
      ZVAL_LONG(holder, 0);
      return SUCCESS;
    case IS_TRUE:
      ZVAL_LONG(holder, 1);
      return SUCCESS;
    case IS_STRING:
    {
      bool trailing_data = false;
      /* For BC reasons we allow errors so that we can warn on leading numeric string */
      if (0 == (Z_TYPE_INFO_P(holder) = is_numeric_string_ex(Z_STRVAL_P(op), Z_STRLEN_P(op),
          &Z_LVAL_P(holder), &Z_DVAL_P(holder),  /* allow errors */ true, NULL, &trailing_data))) {
        /* Will lead to invalid OP type error */
        return FAILURE;
      }
      if (UNEXPECTED(trailing_data)) {
        zend_error(E_WARNING, "A non-numeric value encountered");
        if (UNEXPECTED(EG(exception))) {
          return FAILURE;
        }
      }
      return SUCCESS;
    }
    case IS_OBJECT:
      if (Z_OBJ_HT_P(op)->cast_object(Z_OBJ_P(op), holder, _IS_NUMBER) == FAILURE
          || EG(exception)) {
        return FAILURE;
      }
      ZEND_ASSERT(Z_TYPE_P(holder) == IS_LONG || Z_TYPE_P(holder) == IS_DOUBLE);
      return SUCCESS;
    case IS_RESOURCE:
    case IS_ARRAY:
      return FAILURE;
    default: ZEND_UNREACHABLE();
  }
}
/* }}} */

static zend_always_inline zend_result zendi_try_convert_scalar_to_number(zval *op, zval *holder) /* {{{ */
{
  if (Z_TYPE_P(op) == IS_LONG || Z_TYPE_P(op) == IS_DOUBLE) {
    ZVAL_COPY_VALUE(holder, op);
    return SUCCESS;
  } else {
    return _zendi_try_convert_scalar_to_number(op, holder);
  }
}
/* }}} */

static zend_never_inline zend_long ZEND_FASTCALL zendi_try_get_long(const zval *op, bool *failed) /* {{{ */
{
  *failed = false;
try_again:
  switch (Z_TYPE_P(op)) {
    case IS_NULL:
    case IS_FALSE:
      return 0;
    case IS_TRUE:
      return 1;
    case IS_DOUBLE: {
      double dval = Z_DVAL_P(op);
      zend_long lval = zend_dval_to_lval_safe(dval);
      if (UNEXPECTED(EG(exception))) {
        *failed = true;
      }
      return lval;
    }
    case IS_STRING:
      {
        uint8_t type;
        zend_long lval;
        double dval;
        bool trailing_data = false;
        zend_string *op_str = NULL; /* protect against error handlers */

        /* For BC reasons we allow errors so that we can warn on leading numeric string */
        type = is_numeric_string_ex(Z_STRVAL_P(op), Z_STRLEN_P(op), &lval, &dval,
          /* allow errors */ true, NULL, &trailing_data);
        if (type == 0) {
          *failed = true;
          return 0;
        }
        if (UNEXPECTED(trailing_data)) {
          if (type != IS_LONG) {
            op_str = zend_string_copy(Z_STR_P(op));
          }
          zend_error(E_WARNING, "A non-numeric value encountered");
          if (UNEXPECTED(EG(exception))) {
            *failed = true;
            zend_tmp_string_release(op_str);
            return 0;
          }
        }
        if (EXPECTED(type == IS_LONG)) {
          return lval;
        } else {
          /* Previously we used strtol here, not is_numeric_string,
           * and strtol gives you LONG_MAX/_MIN on overflow.
           * We use use saturating conversion to emulate strtol()'s
           * behaviour.
           */
          lval = zend_dval_to_lval_cap(dval);
          if (!zend_is_long_compatible(dval, lval)) {
            zend_incompatible_string_to_long_error(op_str ? op_str : Z_STR_P(op));
            if (UNEXPECTED(EG(exception))) {
              *failed = true;
            }
          }
          zend_tmp_string_release(op_str);
          return lval;
        }
      }
    case IS_OBJECT:
      {
        zval dst;
        if (Z_OBJ_HT_P(op)->cast_object(Z_OBJ_P(op), &dst, IS_LONG) == FAILURE
            || EG(exception)) {
          *failed = true;
          return 0;
        }
        ZEND_ASSERT(Z_TYPE(dst) == IS_LONG);
        return Z_LVAL(dst);
      }
    case IS_RESOURCE:
    case IS_ARRAY:
      *failed = true;
      return 0;
    case IS_REFERENCE:
      op = Z_REFVAL_P(op);
      if (Z_TYPE_P(op) == IS_LONG) {
        return Z_LVAL_P(op);
      } else {
        goto try_again;
      }
      break;
    default: ZEND_UNREACHABLE();
  }
}
/* }}} */

ZEND_API zend_long ZEND_FASTCALL zval_try_get_long(const zval *op, bool *failed)
{
  if (EXPECTED(Z_TYPE_P(op) == IS_LONG)) {
    *failed = false;
    return Z_LVAL_P(op);
  }
  return zendi_try_get_long(op, failed);
}

#define ZEND_TRY_BINARY_OP1_OBJECT_OPERATION(opcode) \
  if (UNEXPECTED(Z_TYPE_P(op1) == IS_OBJECT) \
    && UNEXPECTED(Z_OBJ_HANDLER_P(op1, do_operation))) { \
    if (EXPECTED(SUCCESS == Z_OBJ_HANDLER_P(op1, do_operation)(opcode, result, op1, op2))) { \
      return SUCCESS; \
    } \
  }

#define ZEND_TRY_BINARY_OP2_OBJECT_OPERATION(opcode) \
  if (UNEXPECTED(Z_TYPE_P(op2) == IS_OBJECT) \
    && UNEXPECTED(Z_OBJ_HANDLER_P(op2, do_operation)) \
    && EXPECTED(SUCCESS == Z_OBJ_HANDLER_P(op2, do_operation)(opcode, result, op1, op2))) { \
    return SUCCESS; \
  }

#define ZEND_TRY_BINARY_OBJECT_OPERATION(opcode) \
  ZEND_TRY_BINARY_OP1_OBJECT_OPERATION(opcode) \
  else \
  ZEND_TRY_BINARY_OP2_OBJECT_OPERATION(opcode)

#define ZEND_TRY_UNARY_OBJECT_OPERATION(opcode) \
  if (UNEXPECTED(Z_TYPE_P(op1) == IS_OBJECT) \
    && UNEXPECTED(Z_OBJ_HANDLER_P(op1, do_operation)) \
    && EXPECTED(SUCCESS == Z_OBJ_HANDLER_P(op1, do_operation)(opcode, result, op1, NULL))) { \
    return SUCCESS; \
  }

#define convert_op1_op2_long(op1, op1_lval, op2, op2_lval, result, opcode, sigil) \
  do {                               \
    if (UNEXPECTED(Z_TYPE_P(op1) != IS_LONG)) {           \
      bool failed;                      \
      if (Z_ISREF_P(op1)) {                   \
        op1 = Z_REFVAL_P(op1);                  \
        if (Z_TYPE_P(op1) == IS_LONG) {             \
          op1_lval = Z_LVAL_P(op1);              \
          break;                        \
        }                           \
      }                              \
      ZEND_TRY_BINARY_OP1_OBJECT_OPERATION(opcode);       \
      op1_lval = zendi_try_get_long(op1, &failed);        \
      if (UNEXPECTED(failed)) {                 \
        zend_binop_error(sigil, op1, op2);            \
        if (result != op1) {                 \
          ZVAL_UNDEF(result);                 \
        }                            \
        return FAILURE;                     \
      }                              \
    } else {                           \
      op1_lval = Z_LVAL_P(op1);                  \
    }                                \
  } while (0);                            \
  do {                               \
    if (UNEXPECTED(Z_TYPE_P(op2) != IS_LONG)) {           \
      bool failed;                      \
      if (Z_ISREF_P(op2)) {                   \
        op2 = Z_REFVAL_P(op2);                  \
        if (Z_TYPE_P(op2) == IS_LONG) {             \
          op2_lval = Z_LVAL_P(op2);              \
          break;                        \
        }                            \
      }                              \
      ZEND_TRY_BINARY_OP2_OBJECT_OPERATION(opcode);       \
      op2_lval = zendi_try_get_long(op2, &failed);        \
      if (UNEXPECTED(failed)) {                 \
        zend_binop_error(sigil, op1, op2);            \
        if (result != op1) {                 \
          ZVAL_UNDEF(result);                 \
        }                            \
        return FAILURE;                     \
      }                              \
    } else {                           \
      op2_lval = Z_LVAL_P(op2);                  \
    }                                \
  } while (0);

ZEND_API void ZEND_FASTCALL convert_to_long(zval *op) /* {{{ */
{
  zend_long tmp;

try_again:
  switch (Z_TYPE_P(op)) {
    case IS_NULL:
    case IS_FALSE:
      ZVAL_LONG(op, 0);
      break;
    case IS_TRUE:
      ZVAL_LONG(op, 1);
      break;
    case IS_RESOURCE:
      tmp = Z_RES_HANDLE_P(op);
      zval_ptr_dtor(op);
      ZVAL_LONG(op, tmp);
      break;
    case IS_LONG:
      break;
    case IS_DOUBLE: {
      /* NAN might emit a warning */
      zend_long new_value = zend_dval_to_lval(Z_DVAL_P(op));
      zval_ptr_dtor(op);
      ZVAL_LONG(op, new_value);
      break;
    }
    case IS_STRING:
      {
        zend_string *str = Z_STR_P(op);
        ZVAL_LONG(op, zval_get_long(op));
        zend_string_release_ex(str, 0);
      }
      break;
    case IS_ARRAY:
      tmp = (zend_hash_num_elements(Z_ARRVAL_P(op))?1:0);
      zval_ptr_dtor(op);
      ZVAL_LONG(op, tmp);
      break;
    case IS_OBJECT:
      {
        zval dst;

        convert_object_to_type(op, &dst, IS_LONG);
        zval_ptr_dtor(op);

        if (Z_TYPE(dst) == IS_LONG) {
          ZVAL_LONG(op, Z_LVAL(dst));
        } else {
          ZVAL_LONG(op, 1);
        }
        return;
      }
    case IS_REFERENCE:
      zend_unwrap_reference(op);
      goto try_again;
    default: ZEND_UNREACHABLE();
  }
}
/* }}} */

ZEND_API void ZEND_FASTCALL convert_to_double(zval *op) /* {{{ */
{
  double tmp;

try_again:
  switch (Z_TYPE_P(op)) {
    case IS_NULL:
    case IS_FALSE:
      ZVAL_DOUBLE(op, 0.0);
      break;
    case IS_TRUE:
      ZVAL_DOUBLE(op, 1.0);
      break;
    case IS_RESOURCE: {
        double d = (double) Z_RES_HANDLE_P(op);
        zval_ptr_dtor(op);
        ZVAL_DOUBLE(op, d);
      }
      break;
    case IS_LONG:
      ZVAL_DOUBLE(op, (double) Z_LVAL_P(op));
      break;
    case IS_DOUBLE:
      break;
    case IS_STRING:
      {
        zend_string *str = Z_STR_P(op);

        ZVAL_DOUBLE(op, zend_strtod(ZSTR_VAL(str), NULL));
        zend_string_release_ex(str, 0);
      }
      break;
    case IS_ARRAY:
      tmp = (zend_hash_num_elements(Z_ARRVAL_P(op))?1:0);
      zval_ptr_dtor(op);
      ZVAL_DOUBLE(op, tmp);
      break;
    case IS_OBJECT:
      {
        zval dst;

        convert_object_to_type(op, &dst, IS_DOUBLE);
        zval_ptr_dtor(op);

        if (Z_TYPE(dst) == IS_DOUBLE) {
          ZVAL_DOUBLE(op, Z_DVAL(dst));
        } else {
          ZVAL_DOUBLE(op, 1.0);
        }
        break;
      }
    case IS_REFERENCE:
      zend_unwrap_reference(op);
      goto try_again;
    default: ZEND_UNREACHABLE();
  }
}
/* }}} */

ZEND_API void ZEND_FASTCALL convert_to_null(zval *op) /* {{{ */
{
  if (UNEXPECTED(Z_TYPE_P(op) == IS_DOUBLE && zend_isnan(Z_DVAL_P(op)))) {
    zend_nan_coerced_to_type_warning(IS_NULL);
  }
  zval_ptr_dtor(op);
  ZVAL_NULL(op);
}
/* }}} */

ZEND_API void ZEND_FASTCALL convert_to_boolean(zval *op) /* {{{ */
{
  bool tmp;

try_again:
  switch (Z_TYPE_P(op)) {
    case IS_FALSE:
    case IS_TRUE:
      break;
    case IS_NULL:
      ZVAL_FALSE(op);
      break;
    case IS_RESOURCE: {
        zend_long l = (Z_RES_HANDLE_P(op) ? 1 : 0);

        zval_ptr_dtor(op);
        ZVAL_BOOL(op, l);
      }
      break;
    case IS_LONG:
      ZVAL_BOOL(op, Z_LVAL_P(op) ? 1 : 0);
      break;
    case IS_DOUBLE: {
      /* We compute the new value before emitting the warning as the zval may change */
      bool new_value = Z_DVAL_P(op) ? true : false;
      if (UNEXPECTED(zend_isnan(Z_DVAL_P(op)))) {
        zend_nan_coerced_to_type_warning(_IS_BOOL);
        zval_ptr_dtor(op);
      }
      ZVAL_BOOL(op, new_value);
      break;
    }
    case IS_STRING:
      {
        zend_string *str = Z_STR_P(op);

        if (ZSTR_LEN(str) == 0
          || (ZSTR_LEN(str) == 1 && ZSTR_VAL(str)[0] == '0')) {
          ZVAL_FALSE(op);
        } else {
          ZVAL_TRUE(op);
        }
        zend_string_release_ex(str, 0);
      }
      break;
    case IS_ARRAY:
      tmp = (zend_hash_num_elements(Z_ARRVAL_P(op))?1:0);
      zval_ptr_dtor(op);
      ZVAL_BOOL(op, tmp);
      break;
    case IS_OBJECT:
      {
        zval dst;

        convert_object_to_type(op, &dst, _IS_BOOL);
        zval_ptr_dtor(op);

        if (Z_TYPE_INFO(dst) == IS_FALSE || Z_TYPE_INFO(dst) == IS_TRUE) {
          Z_TYPE_INFO_P(op) = Z_TYPE_INFO(dst);
        } else {
          ZVAL_TRUE(op);
        }
        break;
      }
    case IS_REFERENCE:
      zend_unwrap_reference(op);
      goto try_again;
    default: ZEND_UNREACHABLE();
  }
}
/* }}} */

ZEND_API void ZEND_FASTCALL _convert_to_string(zval *op) /* {{{ */
{
try_again:
  switch (Z_TYPE_P(op)) {
    case IS_UNDEF:
    case IS_NULL:
    case IS_FALSE: {
      ZVAL_EMPTY_STRING(op);
      break;
    }
    case IS_TRUE:
      ZVAL_CHAR(op, '1');
      break;
    case IS_STRING:
      break;
    case IS_RESOURCE: {
      zend_string *str = zend_strpprintf(0, "Resource id #" ZEND_LONG_FMT, (zend_long)Z_RES_HANDLE_P(op));
      zval_ptr_dtor(op);
      ZVAL_NEW_STR(op, str);
      break;
    }
    case IS_LONG:
      ZVAL_STR(op, zend_long_to_str(Z_LVAL_P(op)));
      break;
    case IS_DOUBLE: {
      /* Casting NAN will cause a warning */
      zend_string *new_value = zend_double_to_str(Z_DVAL_P(op));
      zval_ptr_dtor(op);
      ZVAL_NEW_STR(op, new_value);
      break;
    }
    case IS_ARRAY:
      zend_error(E_WARNING, "Array to string conversion");
      zval_ptr_dtor(op);
      ZVAL_INTERNED_STR(op, ZSTR_KNOWN(ZEND_STR_ARRAY_CAPITALIZED));
      break;
    case IS_OBJECT: {
      zval tmp;
      if (Z_OBJ_HT_P(op)->cast_object(Z_OBJ_P(op), &tmp, IS_STRING) == SUCCESS) {
        zval_ptr_dtor(op);
        ZVAL_COPY_VALUE(op, &tmp);
        return;
      }
      if (!EG(exception)) {
        zend_throw_error(NULL, "Object of class %s could not be converted to string", ZSTR_VAL(Z_OBJCE_P(op)->name));
      }
      zval_ptr_dtor(op);
      ZVAL_EMPTY_STRING(op);
      break;
    }
    case IS_REFERENCE:
      zend_unwrap_reference(op);
      goto try_again;
    default: ZEND_UNREACHABLE();
  }
}
/* }}} */

ZEND_API bool ZEND_FASTCALL _try_convert_to_string(zval *op) /* {{{ */
{
  zend_string *str;

  ZEND_ASSERT(Z_TYPE_P(op) != IS_STRING);
  str = zval_try_get_string_func(op);
  if (UNEXPECTED(!str)) {
    return 0;
  }
  zval_ptr_dtor(op);
  ZVAL_STR(op, str);
  return 1;
}
/* }}} */

static void convert_scalar_to_array(zval *op) /* {{{ */
{
  if (UNEXPECTED(Z_TYPE_P(op) == IS_DOUBLE && zend_isnan(Z_DVAL_P(op)))) {
    zend_nan_coerced_to_type_warning(IS_ARRAY);
  }
  HashTable *ht = zend_new_array(1);
  zend_hash_index_add_new(ht, 0, op);
  ZVAL_ARR(op, ht);
}
/* }}} */

ZEND_API void ZEND_FASTCALL convert_to_array(zval *op) /* {{{ */
{
try_again:
  switch (Z_TYPE_P(op)) {
    case IS_ARRAY:
      break;
/* OBJECTS_OPTIMIZE */
    case IS_OBJECT:
      if (Z_OBJCE_P(op) == zend_ce_closure) {
        convert_scalar_to_array(op);
      } else if (ZEND_STD_BUILD_OBJECT_PROPERTIES_ARRAY_COMPATIBLE(op)) {
        /* Optimized version without rebuilding properties HashTable */
        HashTable *ht = zend_std_build_object_properties_array(Z_OBJ_P(op));
        OBJ_RELEASE(Z_OBJ_P(op));
        ZVAL_ARR(op, ht);
      } else {
        HashTable *obj_ht = zend_get_properties_for(op, ZEND_PROP_PURPOSE_ARRAY_CAST);
        if (obj_ht) {
          HashTable *new_obj_ht = zend_proptable_to_symtable(obj_ht,
            (Z_OBJCE_P(op)->default_properties_count ||
             Z_OBJ_P(op)->handlers != &std_object_handlers ||
             GC_IS_RECURSIVE(obj_ht)));
          zval_ptr_dtor(op);
          ZVAL_ARR(op, new_obj_ht);
          zend_release_properties(obj_ht);
        } else {
          zval_ptr_dtor(op);
          /*ZVAL_EMPTY_ARRAY(op);*/
          array_init(op);
        }
      }
      break;
    case IS_NULL:
      /*ZVAL_EMPTY_ARRAY(op);*/
      array_init(op);
      break;
    case IS_REFERENCE:
      zend_unwrap_reference(op);
      goto try_again;
    default:
      convert_scalar_to_array(op);
      break;
  }
}
/* }}} */

ZEND_API void ZEND_FASTCALL convert_to_object(zval *op) /* {{{ */
{
try_again:
  switch (Z_TYPE_P(op)) {
    case IS_ARRAY:
      {
        HashTable *ht = zend_symtable_to_proptable(Z_ARR_P(op));
        zend_object *obj;

        if (GC_FLAGS(ht) & IS_ARRAY_IMMUTABLE) {
          /* TODO: try not to duplicate immutable arrays as well ??? */
          ht = zend_array_dup(ht);
        } else if (ht != Z_ARR_P(op)) {
          zval_ptr_dtor(op);
        } else {
          GC_DELREF(ht);
        }
        obj = zend_objects_new(zend_standard_class_def);
        obj->properties = ht;
        ZVAL_OBJ(op, obj);
        break;
      }
    case IS_OBJECT:
      break;
    case IS_NULL:
      object_init(op);
      break;
    case IS_REFERENCE:
      zend_unwrap_reference(op);
      goto try_again;
    case IS_DOUBLE:
      if (UNEXPECTED(zend_isnan(Z_DVAL_P(op)))) {
        zend_nan_coerced_to_type_warning(IS_OBJECT);
      }
      ZEND_FALLTHROUGH;
    default: {
      zval tmp;
      ZVAL_COPY_VALUE(&tmp, op);
      object_init(op);
      zend_hash_add_new(Z_OBJPROP_P(op), ZSTR_KNOWN(ZEND_STR_SCALAR), &tmp);
      break;
    }
  }
}
/* }}} */

ZEND_API void ZEND_COLD zend_incompatible_double_to_long_error(double d)
{
  zend_error_unchecked(E_DEPRECATED, "Implicit conversion from float %.*H to int loses precision", -1, d);
}
ZEND_API void ZEND_COLD zend_incompatible_string_to_long_error(const zend_string *s)
{
  zend_error(E_DEPRECATED, "Implicit conversion from float-string \"%s\" to int loses precision", ZSTR_VAL(s));
}
ZEND_API void ZEND_COLD zend_oob_double_to_long_error(double d)
{
  zend_error_unchecked(E_WARNING, "The float %.*H is not representable as an int, cast occurred", -1, d);
}
ZEND_API void ZEND_COLD zend_oob_string_to_long_error(const zend_string *s)
{
  zend_error_unchecked(E_WARNING, "The float-string \"%s\" is not representable as an int, cast occurred", ZSTR_VAL(s));
}

ZEND_API void ZEND_COLD zend_nan_coerced_to_type_warning(uint8_t type)
{
  zend_error(E_WARNING, "unexpected NAN value was coerced to %s", zend_get_type_by_const(type));
}

ZEND_API zend_long ZEND_FASTCALL zval_get_long_func(const zval *op, bool is_strict) /* {{{ */
{
try_again:
  switch (Z_TYPE_P(op)) {
    case IS_UNDEF:
    case IS_NULL:
    case IS_FALSE:
      return 0;
    case IS_TRUE:
      return 1;
    case IS_RESOURCE:
      return Z_RES_HANDLE_P(op);
    case IS_LONG:
      return Z_LVAL_P(op);
    case IS_DOUBLE: {
      double dval = Z_DVAL_P(op);
      zend_long lval = zend_dval_to_lval(dval);
      if (UNEXPECTED(is_strict)) {
        if (!zend_is_long_compatible(dval, lval)) {
          zend_incompatible_double_to_long_error(dval);
        }
      }
      return lval;
    }
    case IS_STRING:
      {
        uint8_t type;
        zend_long lval;
        double dval;
        if (0 == (type = is_numeric_string(Z_STRVAL_P(op), Z_STRLEN_P(op), &lval, &dval, true))) {
          return 0;
        } else if (EXPECTED(type == IS_LONG)) {
          return lval;
        } else {
          /* Previously we used strtol here, not is_numeric_string,
           * and strtol gives you LONG_MAX/_MIN on overflow.
           * We use saturating conversion to emulate strtol()'s
           * behaviour.
           */
           /* Most usages are expected to not be (int) casts */
          lval = zend_dval_to_lval_cap(dval);
          if (UNEXPECTED(is_strict)) {
            if (!zend_is_long_compatible(dval, lval)) {
              zend_incompatible_string_to_long_error(Z_STR_P(op));
            }
          }
          return lval;
        }
      }
    case IS_ARRAY:
      return zend_hash_num_elements(Z_ARRVAL_P(op)) ? 1 : 0;
    case IS_OBJECT:
      {
        zval dst;
        convert_object_to_type(op, &dst, IS_LONG);
        if (Z_TYPE(dst) == IS_LONG) {
          return Z_LVAL(dst);
        } else {
          return 1;
        }
      }
    case IS_REFERENCE:
      op = Z_REFVAL_P(op);
      goto try_again;
    default: ZEND_UNREACHABLE();
  }
  return 0;
}
/* }}} */

ZEND_API double ZEND_FASTCALL zval_get_double_func(const zval *op) /* {{{ */
{
try_again:
  switch (Z_TYPE_P(op)) {
    case IS_NULL:
    case IS_FALSE:
      return 0.0;
    case IS_TRUE:
      return 1.0;
    case IS_RESOURCE:
      return (double) Z_RES_HANDLE_P(op);
    case IS_LONG:
      return (double) Z_LVAL_P(op);
    case IS_DOUBLE:
      return Z_DVAL_P(op);
    case IS_STRING:
      return zend_strtod(Z_STRVAL_P(op), NULL);
    case IS_ARRAY:
      return zend_hash_num_elements(Z_ARRVAL_P(op)) ? 1.0 : 0.0;
    case IS_OBJECT:
      {
        zval dst;
        convert_object_to_type(op, &dst, IS_DOUBLE);

        if (Z_TYPE(dst) == IS_DOUBLE) {
          return Z_DVAL(dst);
        } else {
          return 1.0;
        }
      }
    case IS_REFERENCE:
      op = Z_REFVAL_P(op);
      goto try_again;
    default: ZEND_UNREACHABLE();
  }
  return 0.0;
}
/* }}} */

/*
 * Strings use zval_try_get_long() numeric-string semantics. If *failed is true,
 * the return value must not be used and an exception may be pending. The input
 * must not be IS_UNDEF.
 */
ZEND_API double ZEND_FASTCALL zval_try_get_double_func(const zval *op, bool *failed)
{
  *failed = false;
try_again:
  switch (Z_TYPE_P(op)) {
    case IS_NULL:
    case IS_FALSE:
      return 0.0;
    case IS_TRUE:
      return 1.0;
    case IS_LONG:
      return (double) Z_LVAL_P(op);
    case IS_DOUBLE:
      return Z_DVAL_P(op);
    case IS_STRING:
      {
        uint8_t type;
        zend_long lval;
        double dval;
        double result;
        bool trailing_data = false;

        type = is_numeric_string_ex(Z_STRVAL_P(op), Z_STRLEN_P(op), &lval, &dval,
          /* allow errors */ true, NULL, &trailing_data);
        if (type == 0) {
          *failed = true;
          return 0.0;
        }
        if (type == IS_DOUBLE) {
          result = dval;
        } else if (UNEXPECTED(lval == 0)) {
          result = zend_strtod(Z_STRVAL_P(op), NULL);
        } else {
          result = (double) lval;
        }
        if (UNEXPECTED(trailing_data)) {
          zend_error(E_WARNING, "A non-numeric value encountered");
          if (UNEXPECTED(EG(exception))) {
            *failed = true;
            return 0.0;
          }
        }
        return result;
      }
    case IS_OBJECT:
      {
        zval dst;
        if (Z_OBJ_HT_P(op)->cast_object(Z_OBJ_P(op), &dst, IS_DOUBLE) == FAILURE
            || EG(exception)) {
          *failed = true;
          return 0.0;
        }
        ZEND_ASSERT(Z_TYPE(dst) == IS_DOUBLE);
        return Z_DVAL(dst);
      }
    case IS_RESOURCE:
    case IS_ARRAY:
      *failed = true;
      return 0.0;
    case IS_REFERENCE:
      op = Z_REFVAL_P(op);
      goto try_again;
    default: ZEND_UNREACHABLE();
  }
}

static zend_always_inline zend_string* __zval_get_string_func(const zval *op, bool try) /* {{{ */
{
try_again:
  switch (Z_TYPE_P(op)) {
    case IS_UNDEF:
    case IS_NULL:
    case IS_FALSE:
      return ZSTR_EMPTY_ALLOC();
    case IS_TRUE:
      return ZSTR_CHAR('1');
    case IS_RESOURCE:
      return zend_strpprintf(0, "Resource id #" ZEND_LONG_FMT, (zend_long)Z_RES_HANDLE_P(op));
    case IS_LONG:
      return zend_long_to_str(Z_LVAL_P(op));
    case IS_DOUBLE:
      return zend_double_to_str(Z_DVAL_P(op));
    case IS_ARRAY:
      zend_error(E_WARNING, "Array to string conversion");
      return (try && UNEXPECTED(EG(exception))) ?
        NULL : ZSTR_KNOWN(ZEND_STR_ARRAY_CAPITALIZED);
    case IS_OBJECT: {
      zval tmp;
      if (Z_OBJ_HT_P(op)->cast_object(Z_OBJ_P(op), &tmp, IS_STRING) == SUCCESS) {
        return Z_STR(tmp);
      }
      if (!EG(exception)) {
        zend_throw_error(NULL, "Object of class %s could not be converted to string", ZSTR_VAL(Z_OBJCE_P(op)->name));
      }
      return try ? NULL : ZSTR_EMPTY_ALLOC();
    }
    case IS_REFERENCE:
      op = Z_REFVAL_P(op);
      goto try_again;
    case IS_STRING:
      return zend_string_copy(Z_STR_P(op));
    default: ZEND_UNREACHABLE();
  }
  return NULL;
}
/* }}} */

ZEND_API zend_string* ZEND_FASTCALL zval_get_string_func(const zval *op) /* {{{ */
{
  return __zval_get_string_func(op, false);
}
/* }}} */

ZEND_API zend_string* ZEND_FASTCALL zval_try_get_string_func(const zval *op) /* {{{ */
{
  return __zval_get_string_func(op, true);
}
/* }}} */

static ZEND_COLD zend_never_inline void ZEND_FASTCALL zend_binop_error(const char *operator, const zval *op1, const zval *op2) /* {{{ */ {
  if (EG(exception)) {
    return;
  }

  zend_type_error("Unsupported operand types: %s %s %s",
    zend_zval_type_name(op1), operator, zend_zval_type_name(op2));
}
/* }}} */

static zend_never_inline void ZEND_FASTCALL add_function_array(zval *result, const zval *op1, const zval *op2) /* {{{ */
{
  if (result == op1 && Z_ARR_P(op1) == Z_ARR_P(op2)) {
    /* $a += $a */
    return;
  }
  if (result != op1) {
    ZVAL_ARR(result, zend_array_dup(Z_ARR_P(op1)));
  } else {
    SEPARATE_ARRAY(result);
  }
  zend_hash_merge(Z_ARRVAL_P(result), Z_ARRVAL_P(op2), zval_add_ref, 0);
}
/* }}} */

static zend_always_inline zend_result add_function_fast(zval *result, zval *op1, zval *op2) /* {{{ */
{
  uint8_t type_pair = TYPE_PAIR(Z_TYPE_P(op1), Z_TYPE_P(op2));

  if (EXPECTED(type_pair == TYPE_PAIR(IS_LONG, IS_LONG))) {
    fast_long_add_function(result, op1, op2);
    return SUCCESS;
  } else if (EXPECTED(type_pair == TYPE_PAIR(IS_DOUBLE, IS_DOUBLE))) {
    ZVAL_DOUBLE(result, Z_DVAL_P(op1) + Z_DVAL_P(op2));
    return SUCCESS;
  } else if (EXPECTED(type_pair == TYPE_PAIR(IS_LONG, IS_DOUBLE))) {
    ZVAL_DOUBLE(result, ((double)Z_LVAL_P(op1)) + Z_DVAL_P(op2));
    return SUCCESS;
  } else if (EXPECTED(type_pair == TYPE_PAIR(IS_DOUBLE, IS_LONG))) {
    ZVAL_DOUBLE(result, Z_DVAL_P(op1) + ((double)Z_LVAL_P(op2)));
    return SUCCESS;
  } else if (EXPECTED(type_pair == TYPE_PAIR(IS_ARRAY, IS_ARRAY))) {
    add_function_array(result, op1, op2);
    return SUCCESS;
  } else {
    return FAILURE;
  }
} /* }}} */

static zend_never_inline zend_result ZEND_FASTCALL add_function_slow(zval *result, zval *op1, zval *op2) /* {{{ */
{
  ZVAL_DEREF(op1);
  ZVAL_DEREF(op2);
  if (add_function_fast(result, op1, op2) == SUCCESS) {
    return SUCCESS;
  }

  ZEND_TRY_BINARY_OBJECT_OPERATION(ZEND_ADD);

  zval op1_copy, op2_copy;
  if (UNEXPECTED(zendi_try_convert_scalar_to_number(op1, &op1_copy) == FAILURE)
      || UNEXPECTED(zendi_try_convert_scalar_to_number(op2, &op2_copy) == FAILURE)) {
    zend_binop_error("+", op1, op2);
    if (result != op1) {
      ZVAL_UNDEF(result);
    }
    return FAILURE;
  }

  if (result == op1) {
    zval_ptr_dtor(result);
  }

  if (add_function_fast(result, &op1_copy, &op2_copy) == SUCCESS) {
    return SUCCESS;
  }

  ZEND_ASSERT(0 && "Operation must succeed");
  return FAILURE;
} /* }}} */

ZEND_API zend_result ZEND_FASTCALL add_function(zval *result, zval *op1, zval *op2) /* {{{ */
{
  if (add_function_fast(result, op1, op2) == SUCCESS) {
    return SUCCESS;
  } else {
    return add_function_slow(result, op1, op2);
  }
}
/* }}} */

static zend_always_inline zend_result sub_function_fast(zval *result, zval *op1, zval *op2) /* {{{ */
{
  uint8_t type_pair = TYPE_PAIR(Z_TYPE_P(op1), Z_TYPE_P(op2));

  if (EXPECTED(type_pair == TYPE_PAIR(IS_LONG, IS_LONG))) {
    fast_long_sub_function(result, op1, op2);
    return SUCCESS;
  } else if (EXPECTED(type_pair == TYPE_PAIR(IS_DOUBLE, IS_DOUBLE))) {
    ZVAL_DOUBLE(result, Z_DVAL_P(op1) - Z_DVAL_P(op2));
    return SUCCESS;
  } else if (EXPECTED(type_pair == TYPE_PAIR(IS_LONG, IS_DOUBLE))) {
    ZVAL_DOUBLE(result, ((double)Z_LVAL_P(op1)) - Z_DVAL_P(op2));
    return SUCCESS;
  } else if (EXPECTED(type_pair == TYPE_PAIR(IS_DOUBLE, IS_LONG))) {
    ZVAL_DOUBLE(result, Z_DVAL_P(op1) - ((double)Z_LVAL_P(op2)));
    return SUCCESS;
  } else {
    return FAILURE;
  }
}
/* }}} */

static zend_never_inline zend_result ZEND_FASTCALL sub_function_slow(zval *result, zval *op1, zval *op2) /* {{{ */
{
  ZVAL_DEREF(op1);
  ZVAL_DEREF(op2);
  if (sub_function_fast(result, op1, op2) == SUCCESS) {
    return SUCCESS;
  }

  ZEND_TRY_BINARY_OBJECT_OPERATION(ZEND_SUB);

  zval op1_copy, op2_copy;
  if (UNEXPECTED(zendi_try_convert_scalar_to_number(op1, &op1_copy) == FAILURE)
      || UNEXPECTED(zendi_try_convert_scalar_to_number(op2, &op2_copy) == FAILURE)) {
    zend_binop_error("-", op1, op2);
    if (result != op1) {
      ZVAL_UNDEF(result);
    }
    return FAILURE;
  }

  if (result == op1) {
    zval_ptr_dtor(result);
  }

  if (sub_function_fast(result, &op1_copy, &op2_copy) == SUCCESS) {
    return SUCCESS;
  }

  ZEND_ASSERT(0 && "Operation must succeed");
  return FAILURE;
}
/* }}} */

ZEND_API zend_result ZEND_FASTCALL sub_function(zval *result, zval *op1, zval *op2) /* {{{ */
{
  if (sub_function_fast(result, op1, op2) == SUCCESS) {
    return SUCCESS;
  } else {
    return sub_function_slow(result, op1, op2);
  }
}
/* }}} */

static zend_always_inline zend_result mul_function_fast(zval *result, zval *op1, zval *op2) /* {{{ */
{
  uint8_t type_pair = TYPE_PAIR(Z_TYPE_P(op1), Z_TYPE_P(op2));

  if (EXPECTED(type_pair == TYPE_PAIR(IS_LONG, IS_LONG))) {
    zend_long overflow;
    ZEND_SIGNED_MULTIPLY_LONG(
      Z_LVAL_P(op1), Z_LVAL_P(op2),
      Z_LVAL_P(result), Z_DVAL_P(result), overflow);
    Z_TYPE_INFO_P(result) = overflow ? IS_DOUBLE : IS_LONG;
    return SUCCESS;
  } else if (EXPECTED(type_pair == TYPE_PAIR(IS_DOUBLE, IS_DOUBLE))) {
    ZVAL_DOUBLE(result, Z_DVAL_P(op1) * Z_DVAL_P(op2));
    return SUCCESS;
  } else if (EXPECTED(type_pair == TYPE_PAIR(IS_LONG, IS_DOUBLE))) {
    ZVAL_DOUBLE(result, ((double)Z_LVAL_P(op1)) * Z_DVAL_P(op2));
    return SUCCESS;
  } else if (EXPECTED(type_pair == TYPE_PAIR(IS_DOUBLE, IS_LONG))) {
    ZVAL_DOUBLE(result, Z_DVAL_P(op1) * ((double)Z_LVAL_P(op2)));
    return SUCCESS;
  } else {
    return FAILURE;
  }
}
/* }}} */

static zend_never_inline zend_result ZEND_FASTCALL mul_function_slow(zval *result, zval *op1, zval *op2) /* {{{ */
{
  ZVAL_DEREF(op1);
  ZVAL_DEREF(op2);
  if (mul_function_fast(result, op1, op2) == SUCCESS) {
    return SUCCESS;
  }

  ZEND_TRY_BINARY_OBJECT_OPERATION(ZEND_MUL);

  zval op1_copy, op2_copy;
  if (UNEXPECTED(zendi_try_convert_scalar_to_number(op1, &op1_copy) == FAILURE)
      || UNEXPECTED(zendi_try_convert_scalar_to_number(op2, &op2_copy) == FAILURE)) {
    zend_binop_error("*", op1, op2);
    if (result != op1) {
      ZVAL_UNDEF(result);
    }
    return FAILURE;
  }

  if (result == op1) {
    zval_ptr_dtor(result);
  }

  if (mul_function_fast(result, &op1_copy, &op2_copy) == SUCCESS) {
    return SUCCESS;
  }

  ZEND_ASSERT(0 && "Operation must succeed");
  return FAILURE;
}
/* }}} */

ZEND_API zend_result ZEND_FASTCALL mul_function(zval *result, zval *op1, zval *op2) /* {{{ */
{
  if (mul_function_fast(result, op1, op2) == SUCCESS) {
    return SUCCESS;
  } else {
    return mul_function_slow(result, op1, op2);
  }
}
/* }}} */

static void ZEND_COLD zend_power_base_0_exponent_lt_0_error(void)
{
  zend_error(E_DEPRECATED, "Power of base 0 and negative exponent is deprecated");
}

static double safe_pow(double base, double exponent)
{
  if (UNEXPECTED(base == 0.0 && exponent < 0.0)) {
    zend_power_base_0_exponent_lt_0_error();
  }

  return pow(base, exponent);
}

static zend_result ZEND_FASTCALL pow_function_base(zval *result, zval *op1, zval *op2) /* {{{ */
{
  uint8_t type_pair = TYPE_PAIR(Z_TYPE_P(op1), Z_TYPE_P(op2));

  if (EXPECTED(type_pair == TYPE_PAIR(IS_LONG, IS_LONG))) {
    if (Z_LVAL_P(op2) >= 0) {
      zend_long l1 = 1, l2 = Z_LVAL_P(op1), i = Z_LVAL_P(op2);

      if (i == 0) {
        ZVAL_LONG(result, 1L);
        return SUCCESS;
      } else if (l2 == 0) {
        ZVAL_LONG(result, 0);
        return SUCCESS;
      }

      while (i >= 1) {
        zend_long overflow;
        double dval = 0.0;

        if (i % 2) {
          --i;
          ZEND_SIGNED_MULTIPLY_LONG(l1, l2, l1, dval, overflow);
          if (overflow) {
            ZVAL_DOUBLE(result, dval * safe_pow(l2, i));
            return SUCCESS;
          }
        } else {
          i /= 2;
          ZEND_SIGNED_MULTIPLY_LONG(l2, l2, l2, dval, overflow);
          if (overflow) {
            ZVAL_DOUBLE(result, (double)l1 * safe_pow(dval, i));
            return SUCCESS;
          }
        }
      }
      /* i == 0 */
      ZVAL_LONG(result, l1);
    } else {
      ZVAL_DOUBLE(result, safe_pow((double)Z_LVAL_P(op1), (double)Z_LVAL_P(op2)));
    }
    return SUCCESS;
  } else if (EXPECTED(type_pair == TYPE_PAIR(IS_DOUBLE, IS_DOUBLE))) {
    ZVAL_DOUBLE(result, safe_pow(Z_DVAL_P(op1), Z_DVAL_P(op2)));
    return SUCCESS;
  } else if (EXPECTED(type_pair == TYPE_PAIR(IS_LONG, IS_DOUBLE))) {
    ZVAL_DOUBLE(result, safe_pow((double)Z_LVAL_P(op1), Z_DVAL_P(op2)));
    return SUCCESS;
  } else if (EXPECTED(type_pair == TYPE_PAIR(IS_DOUBLE, IS_LONG))) {
    ZVAL_DOUBLE(result, safe_pow(Z_DVAL_P(op1), (double)Z_LVAL_P(op2)));
    return SUCCESS;
  } else {
    return FAILURE;
  }
}
/* }}} */

ZEND_API zend_result ZEND_FASTCALL pow_function(zval *result, zval *op1, zval *op2) /* {{{ */
{
  ZVAL_DEREF(op1);
  ZVAL_DEREF(op2);
  if (pow_function_base(result, op1, op2) == SUCCESS) {
    return SUCCESS;
  }

  ZEND_TRY_BINARY_OBJECT_OPERATION(ZEND_POW);

  zval op1_copy, op2_copy;
  if (UNEXPECTED(zendi_try_convert_scalar_to_number(op1, &op1_copy) == FAILURE)
      || UNEXPECTED(zendi_try_convert_scalar_to_number(op2, &op2_copy) == FAILURE)) {
    zend_binop_error("**", op1, op2);
    if (result != op1) {
      ZVAL_UNDEF(result);
    }
    return FAILURE;
  }

  if (result == op1) {
    zval_ptr_dtor(result);
  }

  if (pow_function_base(result, &op1_copy, &op2_copy) == SUCCESS) {
    return SUCCESS;
  }

  ZEND_ASSERT(0 && "Operation must succeed");
  return FAILURE;
}
/* }}} */

typedef enum {
  DIV_SUCCESS,
  DIV_BY_ZERO,
  DIV_TYPES_NOT_HANDLED
} zend_div_status;

static zend_div_status ZEND_FASTCALL div_function_base(zval *result, const zval *op1, const zval *op2) /* {{{ */
{
  uint8_t type_pair = TYPE_PAIR(Z_TYPE_P(op1), Z_TYPE_P(op2));

  if (EXPECTED(type_pair == TYPE_PAIR(IS_LONG, IS_LONG))) {
    if (Z_LVAL_P(op2) == 0) {
      return DIV_BY_ZERO;
    } else if (Z_LVAL_P(op2) == -1 && Z_LVAL_P(op1) == ZEND_LONG_MIN) {
      /* Prevent overflow error/crash */
      ZVAL_DOUBLE(result, (double) ZEND_LONG_MIN / -1);
      return DIV_SUCCESS;
    }
    if (Z_LVAL_P(op1) % Z_LVAL_P(op2) == 0) { /* integer */
      ZVAL_LONG(result, Z_LVAL_P(op1) / Z_LVAL_P(op2));
    } else {
      ZVAL_DOUBLE(result, ((double) Z_LVAL_P(op1)) / Z_LVAL_P(op2));
    }
    return DIV_SUCCESS;
  } else if (EXPECTED(type_pair == TYPE_PAIR(IS_DOUBLE, IS_DOUBLE))) {
    if (Z_DVAL_P(op2) == 0) {
      return DIV_BY_ZERO;
    }
    ZVAL_DOUBLE(result, Z_DVAL_P(op1) / Z_DVAL_P(op2));
    return DIV_SUCCESS;
  } else if (EXPECTED(type_pair == TYPE_PAIR(IS_DOUBLE, IS_LONG))) {
    if (Z_LVAL_P(op2) == 0) {
      return DIV_BY_ZERO;
    }
    ZVAL_DOUBLE(result, Z_DVAL_P(op1) / (double)Z_LVAL_P(op2));
    return DIV_SUCCESS;
  } else if (EXPECTED(type_pair == TYPE_PAIR(IS_LONG, IS_DOUBLE))) {
    if (Z_DVAL_P(op2) == 0) {
      return DIV_BY_ZERO;
    }
    ZVAL_DOUBLE(result, (double)Z_LVAL_P(op1) / Z_DVAL_P(op2));
    return DIV_SUCCESS;
  } else {
    return DIV_TYPES_NOT_HANDLED;
  }
}
/* }}} */

ZEND_API zend_result ZEND_FASTCALL div_function(zval *result, zval *op1, zval *op2) /* {{{ */
{
  ZVAL_DEREF(op1);
  ZVAL_DEREF(op2);

  zend_div_status retval = div_function_base(result, op1, op2);
  if (EXPECTED(retval == DIV_SUCCESS)) {
    return SUCCESS;
  }

  if (UNEXPECTED(retval == DIV_BY_ZERO)) {
    goto div_by_zero;
  }

  ZEND_TRY_BINARY_OBJECT_OPERATION(ZEND_DIV);

  zval result_copy, op1_copy, op2_copy;
  if (UNEXPECTED(zendi_try_convert_scalar_to_number(op1, &op1_copy) == FAILURE)
      || UNEXPECTED(zendi_try_convert_scalar_to_number(op2, &op2_copy) == FAILURE)) {
    zend_binop_error("/", op1, op2);
    if (result != op1) {
      ZVAL_UNDEF(result);
    }
    return FAILURE;
  }

  retval = div_function_base(&result_copy, &op1_copy, &op2_copy);
  if (retval == DIV_SUCCESS) {
    if (result == op1) {
      zval_ptr_dtor(result);
    }
    ZVAL_COPY_VALUE(result, &result_copy);
    return SUCCESS;
  }

div_by_zero:
  ZEND_ASSERT(retval == DIV_BY_ZERO && "DIV_TYPES_NOT_HANDLED should not occur here");
  if (result != op1) {
    ZVAL_UNDEF(result);
  }
  zend_throw_error(zend_ce_division_by_zero_error, "Division by zero");
  return FAILURE;
}
/* }}} */

ZEND_API zend_result ZEND_FASTCALL mod_function(zval *result, zval *op1, zval *op2) /* {{{ */
{
  zend_long op1_lval, op2_lval;

  convert_op1_op2_long(op1, op1_lval, op2, op2_lval, result, ZEND_MOD, "%");

  if (op2_lval == 0) {
    /* modulus by zero */
    if (EG(current_execute_data) && !CG(in_compilation)) {
      zend_throw_exception_ex(zend_ce_division_by_zero_error, 0, "Modulo by zero");
    } else {
      zend_error_noreturn(E_ERROR, "Modulo by zero");
    }
    if (op1 != result) {
      ZVAL_UNDEF(result);
    }
    return FAILURE;
  }

  if (op1 == result) {
    zval_ptr_dtor(result);
  }

  if (op2_lval == -1) {
    /* Prevent overflow error/crash if op1==LONG_MIN */
    ZVAL_LONG(result, 0);
    return SUCCESS;
  }

  ZVAL_LONG(result, op1_lval % op2_lval);
  return SUCCESS;
}
/* }}} */

ZEND_API zend_result ZEND_FASTCALL boolean_xor_function(zval *result, zval *op1, zval *op2) /* {{{ */
{
  int op1_val, op2_val;

  do {
    if (Z_TYPE_P(op1) == IS_FALSE) {
      op1_val = 0;
    } else if (EXPECTED(Z_TYPE_P(op1) == IS_TRUE)) {
      op1_val = 1;
    } else {
      if (Z_ISREF_P(op1)) {
        op1 = Z_REFVAL_P(op1);
        if (Z_TYPE_P(op1) == IS_FALSE) {
          op1_val = 0;
          break;
        } else if (EXPECTED(Z_TYPE_P(op1) == IS_TRUE)) {
          op1_val = 1;
          break;
        }
      }
      ZEND_TRY_BINARY_OP1_OBJECT_OPERATION(ZEND_BOOL_XOR);
      op1_val = zend_is_true(op1);
    }
  } while (0);
  do {
    if (Z_TYPE_P(op2) == IS_FALSE) {
      op2_val = 0;
    } else if (EXPECTED(Z_TYPE_P(op2) == IS_TRUE)) {
      op2_val = 1;
    } else {
      if (Z_ISREF_P(op2)) {
        op2 = Z_REFVAL_P(op2);
        if (Z_TYPE_P(op2) == IS_FALSE) {
          op2_val = 0;
          break;
        } else if (EXPECTED(Z_TYPE_P(op2) == IS_TRUE)) {
          op2_val = 1;
          break;
        }
      }
      ZEND_TRY_BINARY_OP2_OBJECT_OPERATION(ZEND_BOOL_XOR);
      op2_val = zend_is_true(op2);
    }
  } while (0);

  ZVAL_BOOL(result, op1_val ^ op2_val);
  return SUCCESS;
}
/* }}} */

ZEND_API zend_result ZEND_FASTCALL boolean_not_function(zval *result, zval *op1) /* {{{ */
{
  if (Z_TYPE_P(op1) < IS_TRUE) {
    ZVAL_TRUE(result);
  } else if (EXPECTED(Z_TYPE_P(op1) == IS_TRUE)) {
    ZVAL_FALSE(result);
  } else {
    if (Z_ISREF_P(op1)) {
      op1 = Z_REFVAL_P(op1);
      if (Z_TYPE_P(op1) < IS_TRUE) {
        ZVAL_TRUE(result);
        return SUCCESS;
      } else if (EXPECTED(Z_TYPE_P(op1) == IS_TRUE)) {
        ZVAL_FALSE(result);
        return SUCCESS;
      }
    }
    ZEND_TRY_UNARY_OBJECT_OPERATION(ZEND_BOOL_NOT);

    ZVAL_BOOL(result, !zend_is_true(op1));
  }
  return SUCCESS;
}
/* }}} */

ZEND_API zend_result ZEND_FASTCALL bitwise_not_function(zval *result, zval *op1) /* {{{ */
{
try_again:
  switch (Z_TYPE_P(op1)) {
    case IS_LONG:
      ZVAL_LONG(result, ~Z_LVAL_P(op1));
      return SUCCESS;
    case IS_DOUBLE: {
      zend_long lval = zend_dval_to_lval_safe(Z_DVAL_P(op1));
      if (EG(exception)) {
        if (result != op1) {
          ZVAL_UNDEF(result);
        }
        return FAILURE;
      }
      ZVAL_LONG(result, ~lval);
      return SUCCESS;
    }
    case IS_STRING: {
      size_t i;

      if (Z_STRLEN_P(op1) == 1) {
        zend_uchar not = (zend_uchar) ~*Z_STRVAL_P(op1);
        ZVAL_CHAR(result, not);
      } else {
        ZVAL_NEW_STR(result, zend_string_alloc(Z_STRLEN_P(op1), 0));
        for (i = 0; i < Z_STRLEN_P(op1); i++) {
          Z_STRVAL_P(result)[i] = ~Z_STRVAL_P(op1)[i];
        }
        Z_STRVAL_P(result)[i] = 0;
      }
      return SUCCESS;
    }
    case IS_REFERENCE:
      op1 = Z_REFVAL_P(op1);
      goto try_again;
    default:
      ZEND_TRY_UNARY_OBJECT_OPERATION(ZEND_BW_NOT);

      if (result != op1) {
        ZVAL_UNDEF(result);
      }
      zend_type_error("Cannot perform bitwise not on %s", zend_zval_value_name(op1));
      return FAILURE;
  }
}
/* }}} */

ZEND_API zend_result ZEND_FASTCALL bitwise_or_function(zval *result, zval *op1, zval *op2) /* {{{ */
{
  zend_long op1_lval, op2_lval;

  if (EXPECTED(Z_TYPE_P(op1) == IS_LONG) && EXPECTED(Z_TYPE_P(op2) == IS_LONG)) {
    ZVAL_LONG(result, Z_LVAL_P(op1) | Z_LVAL_P(op2));
    return SUCCESS;
  }

  ZVAL_DEREF(op1);
  ZVAL_DEREF(op2);

  if (Z_TYPE_P(op1) == IS_STRING && EXPECTED(Z_TYPE_P(op2) == IS_STRING)) {
    zval *longer, *shorter;
    zend_string *str;
    size_t i;

    if (EXPECTED(Z_STRLEN_P(op1) >= Z_STRLEN_P(op2))) {
      if (EXPECTED(Z_STRLEN_P(op1) == Z_STRLEN_P(op2)) && Z_STRLEN_P(op1) == 1) {
        zend_uchar or = (zend_uchar) (*Z_STRVAL_P(op1) | *Z_STRVAL_P(op2));
        if (result==op1) {
          zval_ptr_dtor_str(result);
        }
        ZVAL_CHAR(result, or);
        return SUCCESS;
      }
      longer = op1;
      shorter = op2;
    } else {
      longer = op2;
      shorter = op1;
    }

    str = zend_string_alloc(Z_STRLEN_P(longer), 0);
    for (i = 0; i < Z_STRLEN_P(shorter); i++) {
      ZSTR_VAL(str)[i] = Z_STRVAL_P(longer)[i] | Z_STRVAL_P(shorter)[i];
    }
    memcpy(ZSTR_VAL(str) + i, Z_STRVAL_P(longer) + i, Z_STRLEN_P(longer) - i + 1);
    if (result==op1) {
      zval_ptr_dtor_str(result);
    }
    ZVAL_NEW_STR(result, str);
    return SUCCESS;
  }

  if (UNEXPECTED(Z_TYPE_P(op1) != IS_LONG)) {
    bool failed;
    ZEND_TRY_BINARY_OP1_OBJECT_OPERATION(ZEND_BW_OR);
    op1_lval = zendi_try_get_long(op1, &failed);
    if (UNEXPECTED(failed)) {
      zend_binop_error("|", op1, op2);
      if (result != op1) {
        ZVAL_UNDEF(result);
      }
      return FAILURE;
    }
  } else {
    op1_lval = Z_LVAL_P(op1);
  }
  if (UNEXPECTED(Z_TYPE_P(op2) != IS_LONG)) {
    bool failed;
    ZEND_TRY_BINARY_OP2_OBJECT_OPERATION(ZEND_BW_OR);
    op2_lval = zendi_try_get_long(op2, &failed);
    if (UNEXPECTED(failed)) {
      zend_binop_error("|", op1, op2);
      if (result != op1) {
        ZVAL_UNDEF(result);
      }
      return FAILURE;
    }
  } else {
    op2_lval = Z_LVAL_P(op2);
  }

  if (op1 == result) {
    zval_ptr_dtor(result);
  }
  ZVAL_LONG(result, op1_lval | op2_lval);
  return SUCCESS;
}
/* }}} */

ZEND_API zend_result ZEND_FASTCALL bitwise_and_function(zval *result, zval *op1, zval *op2) /* {{{ */
{
  zend_long op1_lval, op2_lval;

  if (EXPECTED(Z_TYPE_P(op1) == IS_LONG) && EXPECTED(Z_TYPE_P(op2) == IS_LONG)) {
    ZVAL_LONG(result, Z_LVAL_P(op1) & Z_LVAL_P(op2));
    return SUCCESS;
  }

  ZVAL_DEREF(op1);
  ZVAL_DEREF(op2);

  if (Z_TYPE_P(op1) == IS_STRING && Z_TYPE_P(op2) == IS_STRING) {
    zval *longer, *shorter;
    zend_string *str;
    size_t i;

    if (EXPECTED(Z_STRLEN_P(op1) >= Z_STRLEN_P(op2))) {
      if (EXPECTED(Z_STRLEN_P(op1) == Z_STRLEN_P(op2)) && Z_STRLEN_P(op1) == 1) {
        zend_uchar and = (zend_uchar) (*Z_STRVAL_P(op1) & *Z_STRVAL_P(op2));
        if (result==op1) {
          zval_ptr_dtor_str(result);
        }
        ZVAL_CHAR(result, and);
        return SUCCESS;
      }
      longer = op1;
      shorter = op2;
    } else {
      longer = op2;
      shorter = op1;
    }

    str = zend_string_alloc(Z_STRLEN_P(shorter), 0);
    for (i = 0; i < Z_STRLEN_P(shorter); i++) {
      ZSTR_VAL(str)[i] = Z_STRVAL_P(shorter)[i] & Z_STRVAL_P(longer)[i];
    }
    ZSTR_VAL(str)[i] = 0;
    if (result==op1) {
      zval_ptr_dtor_str(result);
    }
    ZVAL_NEW_STR(result, str);
    return SUCCESS;
  }

  if (UNEXPECTED(Z_TYPE_P(op1) != IS_LONG)) {
    bool failed;
    ZEND_TRY_BINARY_OP1_OBJECT_OPERATION(ZEND_BW_AND);
    op1_lval = zendi_try_get_long(op1, &failed);
    if (UNEXPECTED(failed)) {
      zend_binop_error("&", op1, op2);
      if (result != op1) {
        ZVAL_UNDEF(result);
      }
      return FAILURE;
    }
  } else {
    op1_lval = Z_LVAL_P(op1);
  }
  if (UNEXPECTED(Z_TYPE_P(op2) != IS_LONG)) {
    bool failed;
    ZEND_TRY_BINARY_OP2_OBJECT_OPERATION(ZEND_BW_AND);
    op2_lval = zendi_try_get_long(op2, &failed);
    if (UNEXPECTED(failed)) {
      zend_binop_error("&", op1, op2);
      if (result != op1) {
        ZVAL_UNDEF(result);
      }
      return FAILURE;
    }
  } else {
    op2_lval = Z_LVAL_P(op2);
  }

  if (op1 == result) {
    zval_ptr_dtor(result);
  }
  ZVAL_LONG(result, op1_lval & op2_lval);
  return SUCCESS;
}
/* }}} */

ZEND_API zend_result ZEND_FASTCALL bitwise_xor_function(zval *result, zval *op1, zval *op2) /* {{{ */
{
  zend_long op1_lval, op2_lval;

  if (EXPECTED(Z_TYPE_P(op1) == IS_LONG) && EXPECTED(Z_TYPE_P(op2) == IS_LONG)) {
    ZVAL_LONG(result, Z_LVAL_P(op1) ^ Z_LVAL_P(op2));
    return SUCCESS;
  }

  ZVAL_DEREF(op1);
  ZVAL_DEREF(op2);

  if (Z_TYPE_P(op1) == IS_STRING && Z_TYPE_P(op2) == IS_STRING) {
    zval *longer, *shorter;
    zend_string *str;
    size_t i;

    if (EXPECTED(Z_STRLEN_P(op1) >= Z_STRLEN_P(op2))) {
      if (EXPECTED(Z_STRLEN_P(op1) == Z_STRLEN_P(op2)) && Z_STRLEN_P(op1) == 1) {
        zend_uchar xor = (zend_uchar) (*Z_STRVAL_P(op1) ^ *Z_STRVAL_P(op2));
        if (result==op1) {
          zval_ptr_dtor_str(result);
        }
        ZVAL_CHAR(result, xor);
        return SUCCESS;
      }
      longer = op1;
      shorter = op2;
    } else {
      longer = op2;
      shorter = op1;
    }

    str = zend_string_alloc(Z_STRLEN_P(shorter), 0);
    for (i = 0; i < Z_STRLEN_P(shorter); i++) {
      ZSTR_VAL(str)[i] = Z_STRVAL_P(shorter)[i] ^ Z_STRVAL_P(longer)[i];
    }
    ZSTR_VAL(str)[i] = 0;
    if (result==op1) {
      zval_ptr_dtor_str(result);
    }
    ZVAL_NEW_STR(result, str);
    return SUCCESS;
  }

  if (UNEXPECTED(Z_TYPE_P(op1) != IS_LONG)) {
    bool failed;
    ZEND_TRY_BINARY_OP1_OBJECT_OPERATION(ZEND_BW_XOR);
    op1_lval = zendi_try_get_long(op1, &failed);
    if (UNEXPECTED(failed)) {
      zend_binop_error("^", op1, op2);
      if (result != op1) {
        ZVAL_UNDEF(result);
      }
      return FAILURE;
    }
  } else {
    op1_lval = Z_LVAL_P(op1);
  }
  if (UNEXPECTED(Z_TYPE_P(op2) != IS_LONG)) {
    bool failed;
    ZEND_TRY_BINARY_OP2_OBJECT_OPERATION(ZEND_BW_XOR);
    op2_lval = zendi_try_get_long(op2, &failed);
    if (UNEXPECTED(failed)) {
      zend_binop_error("^", op1, op2);
      if (result != op1) {
        ZVAL_UNDEF(result);
      }
      return FAILURE;
    }
  } else {
    op2_lval = Z_LVAL_P(op2);
  }

  if (op1 == result) {
    zval_ptr_dtor(result);
  }
  ZVAL_LONG(result, op1_lval ^ op2_lval);
  return SUCCESS;
}
/* }}} */

ZEND_API zend_result ZEND_FASTCALL shift_left_function(zval *result, zval *op1, zval *op2) /* {{{ */
{
  zend_long op1_lval, op2_lval;

  convert_op1_op2_long(op1, op1_lval, op2, op2_lval, result, ZEND_SL, "<<");

  /* prevent wrapping quirkiness on some processors where << 64 + x == << x */
  if (UNEXPECTED((zend_ulong)op2_lval >= SIZEOF_ZEND_LONG * 8)) {
    if (EXPECTED(op2_lval > 0)) {
      if (op1 == result) {
        zval_ptr_dtor(result);
      }
      ZVAL_LONG(result, 0);
      return SUCCESS;
    } else {
      if (EG(current_execute_data) && !CG(in_compilation)) {
        zend_throw_exception_ex(zend_ce_arithmetic_error, 0, "Bit shift by negative number");
      } else {
        zend_error_noreturn(E_ERROR, "Bit shift by negative number");
      }
      if (op1 != result) {
        ZVAL_UNDEF(result);
      }
      return FAILURE;
    }
  }

  if (op1 == result) {
    zval_ptr_dtor(result);
  }

  /* Perform shift on unsigned numbers to get well-defined wrap behavior. */
  ZVAL_LONG(result, (zend_long) ((zend_ulong) op1_lval << op2_lval));
  return SUCCESS;
}
/* }}} */

ZEND_API zend_result ZEND_FASTCALL shift_right_function(zval *result, zval *op1, zval *op2) /* {{{ */
{
  zend_long op1_lval, op2_lval;

  convert_op1_op2_long(op1, op1_lval, op2, op2_lval, result, ZEND_SR, ">>");

  /* prevent wrapping quirkiness on some processors where >> 64 + x == >> x */
  if (UNEXPECTED((zend_ulong)op2_lval >= SIZEOF_ZEND_LONG * 8)) {
    if (EXPECTED(op2_lval > 0)) {
      if (op1 == result) {
        zval_ptr_dtor(result);
      }
      ZVAL_LONG(result, (op1_lval < 0) ? -1 : 0);
      return SUCCESS;
    } else {
      if (EG(current_execute_data) && !CG(in_compilation)) {
        zend_throw_exception_ex(zend_ce_arithmetic_error, 0, "Bit shift by negative number");
      } else {
        zend_error_noreturn(E_ERROR, "Bit shift by negative number");
      }
      if (op1 != result) {
        ZVAL_UNDEF(result);
      }
      return FAILURE;
    }
  }

  if (op1 == result) {
    zval_ptr_dtor(result);
  }

  ZVAL_LONG(result, op1_lval >> op2_lval);
  return SUCCESS;
}
/* }}} */

ZEND_API zend_result ZEND_FASTCALL concat_function(zval *result, zval *op1, zval *op2) /* {{{ */
{
  zval *orig_op1 = op1;
  zend_string *op1_string, *op2_string;
  bool free_op1_string = false;
  bool free_op2_string = false;

  do {
    if (EXPECTED(Z_TYPE_P(op1) == IS_STRING)) {
      op1_string = Z_STR_P(op1);
    } else {
      if (Z_ISREF_P(op1)) {
        op1 = Z_REFVAL_P(op1);
        if (Z_TYPE_P(op1) == IS_STRING) {
          op1_string = Z_STR_P(op1);
          break;
        }
      }
      ZEND_TRY_BINARY_OBJECT_OPERATION(ZEND_CONCAT);
      op1_string = zval_try_get_string_func(op1);
      if (UNEXPECTED(!op1_string)) {
        if (orig_op1 != result) {
          ZVAL_UNDEF(result);
        }
        return FAILURE;
      }
      free_op1_string = true;
      if (result == op1) {
        if (UNEXPECTED(op1 == op2)) {
          op2_string = op1_string;
          goto has_op2_string;
        }
      }
    }
  } while (0);
  do {
    if (EXPECTED(Z_TYPE_P(op2) == IS_STRING)) {
      op2_string = Z_STR_P(op2);
    } else {
      if (Z_ISREF_P(op2)) {
        op2 = Z_REFVAL_P(op2);
        if (Z_TYPE_P(op2) == IS_STRING) {
          op2_string = Z_STR_P(op2);
          break;
        }
      }
      /* hold an additional reference because a userland function could free this */
      if (!free_op1_string) {
        op1_string = zend_string_copy(op1_string);
        free_op1_string = true;
      }
      ZEND_TRY_BINARY_OP2_OBJECT_OPERATION(ZEND_CONCAT);
      op2_string = zval_try_get_string_func(op2);
      if (UNEXPECTED(!op2_string)) {
        zend_string_release_ex(op1_string, false);
        if (orig_op1 != result) {
          ZVAL_UNDEF(result);
        }
        return FAILURE;
      }
      free_op2_string = true;
    }
  } while (0);

has_op2_string:;
  if (UNEXPECTED(ZSTR_LEN(op1_string) == 0)) {
    if (EXPECTED(result != op2 || Z_TYPE_P(result) != IS_STRING)) {
      if (result == orig_op1) {
        i_zval_ptr_dtor(result);
      }
      if (free_op2_string) {
        /* transfer ownership of op2_string */
        ZVAL_STR(result, op2_string);
        free_op2_string = false;
      } else {
        ZVAL_STR_COPY(result, op2_string);
      }
    }
  } else if (UNEXPECTED(ZSTR_LEN(op2_string) == 0)) {
    if (EXPECTED(result != op1 || Z_TYPE_P(result) != IS_STRING)) {
      if (result == orig_op1) {
        i_zval_ptr_dtor(result);
      }
      if (free_op1_string) {
        /* transfer ownership of op1_string */
        ZVAL_STR(result, op1_string);
        free_op1_string = false;
      } else {
        ZVAL_STR_COPY(result, op1_string);
      }
    }
  } else {
    size_t op1_len = ZSTR_LEN(op1_string);
    size_t op2_len = ZSTR_LEN(op2_string);
    size_t result_len = op1_len + op2_len;
    zend_string *result_str;
    uint32_t flags = ZSTR_GET_COPYABLE_CONCAT_PROPERTIES_BOTH(op1_string, op2_string);

    if (UNEXPECTED(op1_len > ZSTR_MAX_LEN - op2_len)) {
      if (free_op1_string) zend_string_release_ex(op1_string, false);
      if (free_op2_string) zend_string_release_ex(op2_string, false);
      zend_throw_error(NULL, "String size overflow");
      if (orig_op1 != result) {
        ZVAL_UNDEF(result);
      }
      return FAILURE;
    }

    if (result == op1) {
      /* Destroy the old result first to drop the refcount, such that $x .= ...; may happen in-place. */
      if (free_op1_string) {
        /* op1_string will be used as the result, so we should not free it */
        i_zval_ptr_dtor(result);
        /* Set it to NULL in case that the extension will throw an out-of-memory error.
         * Otherwise the shutdown sequence will try to free this again. */
        ZVAL_NULL(result);
        free_op1_string = false;
      }
      /* special case, perform operations on result */
      result_str = zend_string_extend(op1_string, result_len, 0);
      /* account for the case where result_str == op1_string == op2_string and the realloc is done */
      if (op1_string == op2_string) {
        if (free_op2_string) {
          zend_string_release_ex(op2_string, false);
          free_op2_string = false;
        }
        op2_string = result_str;
      }
    } else {
      result_str = zend_string_alloc(result_len, 0);
      memcpy(ZSTR_VAL(result_str), ZSTR_VAL(op1_string), op1_len);
      if (result == orig_op1) {
        i_zval_ptr_dtor(result);
      }
    }
    GC_ADD_FLAGS(result_str, flags);

    ZVAL_NEW_STR(result, result_str);
    memcpy(ZSTR_VAL(result_str) + op1_len, ZSTR_VAL(op2_string), op2_len);
    ZSTR_VAL(result_str)[result_len] = '\0';
  }

  if (free_op1_string) zend_string_release_ex(op1_string, false);
  if (free_op2_string) zend_string_release_ex(op2_string, false);

  return SUCCESS;
}
/* }}} */

ZEND_API int ZEND_FASTCALL string_compare_function_ex(const zval *op1, const zval *op2, bool case_insensitive) /* {{{ */
{
  zend_string *tmp_str1, *tmp_str2;
  zend_string *str1 = zval_get_tmp_string(op1, &tmp_str1);
  zend_string *str2 = zval_get_tmp_string(op2, &tmp_str2);
  int ret;

  if (case_insensitive) {
    ret = zend_binary_strcasecmp(ZSTR_VAL(str1), ZSTR_LEN(str1), ZSTR_VAL(str2), ZSTR_LEN(str2));
  } else {
    ret = zend_binary_strcmp(ZSTR_VAL(str1), ZSTR_LEN(str1), ZSTR_VAL(str2), ZSTR_LEN(str2));
  }

  zend_tmp_string_release(tmp_str1);
  zend_tmp_string_release(tmp_str2);
  return ret;
}
/* }}} */

ZEND_API int ZEND_FASTCALL string_compare_function(const zval *op1, const zval *op2) /* {{{ */
{
  if (EXPECTED(Z_TYPE_P(op1) == IS_STRING) &&
      EXPECTED(Z_TYPE_P(op2) == IS_STRING)) {
    if (Z_STR_P(op1) == Z_STR_P(op2)) {
      return 0;
    } else {
      return zend_binary_strcmp(Z_STRVAL_P(op1), Z_STRLEN_P(op1), Z_STRVAL_P(op2), Z_STRLEN_P(op2));
    }
  } else {
    zend_string *tmp_str1, *tmp_str2;
    zend_string *str1 = zval_get_tmp_string(op1, &tmp_str1);
    zend_string *str2 = zval_get_tmp_string(op2, &tmp_str2);
    int ret = zend_binary_strcmp(ZSTR_VAL(str1), ZSTR_LEN(str1), ZSTR_VAL(str2), ZSTR_LEN(str2));

    zend_tmp_string_release(tmp_str1);
    zend_tmp_string_release(tmp_str2);
    return ret;
  }
}
/* }}} */

ZEND_API int ZEND_FASTCALL string_case_compare_function(const zval *op1, const zval *op2) /* {{{ */
{
  if (EXPECTED(Z_TYPE_P(op1) == IS_STRING) &&
      EXPECTED(Z_TYPE_P(op2) == IS_STRING)) {
    if (Z_STR_P(op1) == Z_STR_P(op2)) {
      return 0;
    } else {
      return zend_binary_strcasecmp(Z_STRVAL_P(op1), Z_STRLEN_P(op1), Z_STRVAL_P(op2), Z_STRLEN_P(op2));
    }
  } else {
    zend_string *tmp_str1, *tmp_str2;
    zend_string *str1 = zval_get_tmp_string(op1, &tmp_str1);
    zend_string *str2 = zval_get_tmp_string(op2, &tmp_str2);
    int ret = zend_binary_strcasecmp(ZSTR_VAL(str1), ZSTR_LEN(str1), ZSTR_VAL(str2), ZSTR_LEN(str2));

    zend_tmp_string_release(tmp_str1);
    zend_tmp_string_release(tmp_str2);
    return ret;
  }
}
/* }}} */

ZEND_API int ZEND_FASTCALL string_locale_compare_function(const zval *op1, const zval *op2) /* {{{ */
{
  zend_string *tmp_str1, *tmp_str2;
  zend_string *str1 = zval_get_tmp_string(op1, &tmp_str1);
  zend_string *str2 = zval_get_tmp_string(op2, &tmp_str2);
  int ret = strcoll(ZSTR_VAL(str1), ZSTR_VAL(str2));

  zend_tmp_string_release(tmp_str1);
  zend_tmp_string_release(tmp_str2);
  return ret;
}
/* }}} */

ZEND_API int ZEND_FASTCALL numeric_compare_function(const zval *op1, const zval *op2) /* {{{ */
{
  double d1, d2;

  d1 = zval_get_double(op1);
  d2 = zval_get_double(op2);

  return ZEND_THREEWAY_COMPARE(d1, d2);
}
/* }}} */

ZEND_API zend_result ZEND_FASTCALL compare_function(zval *result, zval *op1, zval *op2) /* {{{ */
{
  int rv = zend_compare(op1, op2);
  ZEND_ASSERT(-1 <= rv && rv <= 1);
  ZVAL_LONG(result, rv);
  return SUCCESS;
}
/* }}} */

static int compare_long_to_string(zend_long lval, const zend_string *str) /* {{{ */
{
  zend_long str_lval;
  double str_dval;
  uint8_t type = is_numeric_string(ZSTR_VAL(str), ZSTR_LEN(str), &str_lval, &str_dval, 0);

  if (type == IS_LONG) {
    return lval > str_lval ? 1 : lval < str_lval ? -1 : 0;
  }

  if (type == IS_DOUBLE) {
    return ZEND_THREEWAY_COMPARE((double) lval, str_dval);
  }

  zend_string *lval_as_str = zend_long_to_str(lval);
  int cmp_result = zend_binary_strcmp(
    ZSTR_VAL(lval_as_str), ZSTR_LEN(lval_as_str), ZSTR_VAL(str), ZSTR_LEN(str));
  zend_string_release(lval_as_str);
  return ZEND_NORMALIZE_BOOL(cmp_result);
}
/* }}} */

static int compare_double_to_string(double dval, const zend_string *str) /* {{{ */
{
  zend_long str_lval;
  double str_dval;
  uint8_t type = is_numeric_string(ZSTR_VAL(str), ZSTR_LEN(str), &str_lval, &str_dval, 0);

  ZEND_ASSERT(!zend_isnan(dval));

  if (type == IS_LONG) {
    return ZEND_THREEWAY_COMPARE(dval, (double) str_lval);
  }

  if (type == IS_DOUBLE) {
    return ZEND_THREEWAY_COMPARE(dval, str_dval);
  }

  zend_string *dval_as_str = zend_double_to_str(dval);
  int cmp_result = zend_binary_strcmp(
    ZSTR_VAL(dval_as_str), ZSTR_LEN(dval_as_str), ZSTR_VAL(str), ZSTR_LEN(str));
  zend_string_release(dval_as_str);
  return ZEND_NORMALIZE_BOOL(cmp_result);
}
/* }}} */

ZEND_API int ZEND_FASTCALL zend_compare(zval *op1, zval *op2) /* {{{ */
{
  bool converted = false;
  zval op1_copy, op2_copy;

  while (1) {
    switch (TYPE_PAIR(Z_TYPE_P(op1), Z_TYPE_P(op2))) {
      case TYPE_PAIR(IS_LONG, IS_LONG):
        return Z_LVAL_P(op1)>Z_LVAL_P(op2)?1:(Z_LVAL_P(op1)<Z_LVAL_P(op2)?-1:0);

      case TYPE_PAIR(IS_DOUBLE, IS_LONG):
        return ZEND_THREEWAY_COMPARE(Z_DVAL_P(op1), (double)Z_LVAL_P(op2));

      case TYPE_PAIR(IS_LONG, IS_DOUBLE):
        return ZEND_THREEWAY_COMPARE((double)Z_LVAL_P(op1), Z_DVAL_P(op2));

      case TYPE_PAIR(IS_DOUBLE, IS_DOUBLE):
        return ZEND_THREEWAY_COMPARE(Z_DVAL_P(op1), Z_DVAL_P(op2));

      case TYPE_PAIR(IS_ARRAY, IS_ARRAY):
        return zend_compare_arrays(op1, op2);

      case TYPE_PAIR(IS_NULL, IS_NULL):
      case TYPE_PAIR(IS_NULL, IS_FALSE):
      case TYPE_PAIR(IS_FALSE, IS_NULL):
      case TYPE_PAIR(IS_FALSE, IS_FALSE):
      case TYPE_PAIR(IS_TRUE, IS_TRUE):
        return 0;

      case TYPE_PAIR(IS_NULL, IS_TRUE):
        return -1;

      case TYPE_PAIR(IS_TRUE, IS_NULL):
        return 1;

      case TYPE_PAIR(IS_STRING, IS_STRING):
        if (Z_STR_P(op1) == Z_STR_P(op2)) {
          return 0;
        }
        return zendi_smart_strcmp(Z_STR_P(op1), Z_STR_P(op2));

      case TYPE_PAIR(IS_NULL, IS_STRING):
        return Z_STRLEN_P(op2) == 0 ? 0 : -1;

      case TYPE_PAIR(IS_STRING, IS_NULL):
        return Z_STRLEN_P(op1) == 0 ? 0 : 1;

      case TYPE_PAIR(IS_LONG, IS_STRING):
        return compare_long_to_string(Z_LVAL_P(op1), Z_STR_P(op2));

      case TYPE_PAIR(IS_STRING, IS_LONG):
        return -compare_long_to_string(Z_LVAL_P(op2), Z_STR_P(op1));

      case TYPE_PAIR(IS_DOUBLE, IS_STRING):
        if (zend_isnan(Z_DVAL_P(op1))) {
          return 1;
        }

        return compare_double_to_string(Z_DVAL_P(op1), Z_STR_P(op2));

      case TYPE_PAIR(IS_STRING, IS_DOUBLE):
        if (zend_isnan(Z_DVAL_P(op2))) {
          return 1;
        }

        return -compare_double_to_string(Z_DVAL_P(op2), Z_STR_P(op1));

      case TYPE_PAIR(IS_OBJECT, IS_NULL):
        return 1;

      case TYPE_PAIR(IS_NULL, IS_OBJECT):
        return -1;

      default:
        if (Z_ISREF_P(op1)) {
          op1 = Z_REFVAL_P(op1);
          continue;
        } else if (Z_ISREF_P(op2)) {
          op2 = Z_REFVAL_P(op2);
          continue;
        }

        if (Z_TYPE_P(op1) == IS_OBJECT
         || Z_TYPE_P(op2) == IS_OBJECT) {
          zval *object, *other;
          if (Z_TYPE_P(op1) == IS_OBJECT) {
            object = op1;
            other = op2;
          } else {
            object = op2;
            other = op1;
          }
          if (EXPECTED(Z_TYPE_P(other) == IS_OBJECT)) {
            if (Z_OBJ_P(object) == Z_OBJ_P(other)) {
              return 0;
            }
          } else if (Z_TYPE_P(other) == IS_TRUE || Z_TYPE_P(other) == IS_FALSE) {
            zval casted;
            if (Z_OBJ_HANDLER_P(object, cast_object)(Z_OBJ_P(object), &casted, _IS_BOOL) == FAILURE) {
              return object == op1 ? 1 : -1;
            }
            int ret = object == op1 ? zend_compare(&casted, other) : zend_compare(other, &casted);
            ZEND_ASSERT(!Z_REFCOUNTED_P(&casted));
            return ret;
          }
          return Z_OBJ_HANDLER_P(object, compare)(op1, op2);
        }

        if (!converted) {
          /* Handle NAN */
          if (UNEXPECTED(
            (Z_TYPE_P(op1) == IS_DOUBLE && zend_isnan(Z_DVAL_P(op1)))
            || (Z_TYPE_P(op2) == IS_DOUBLE && zend_isnan(Z_DVAL_P(op2)))
          )) {
            // TODO: NAN should always be uncomparable
            /* NAN used be cast to TRUE so handle this manually for the time being */
            if (Z_TYPE_P(op1) < IS_TRUE) {
              return -1;
            } else if (Z_TYPE_P(op1) == IS_TRUE || Z_TYPE_P(op2) == IS_TRUE) {
              return 0;
            } else if (Z_TYPE_P(op2) < IS_TRUE) {
              return 1;
            } else if (Z_TYPE_P(op1) != IS_DOUBLE) {
              op1 = _zendi_convert_scalar_to_number_silent(op1, &op1_copy);
              converted = true;
            } else if (Z_TYPE_P(op2) != IS_DOUBLE) {
              op2 = _zendi_convert_scalar_to_number_silent(op2, &op2_copy);
              converted = true;
            }
          } else if (Z_TYPE_P(op1) < IS_TRUE) {
            return zend_is_true(op2) ? -1 : 0;
          } else if (Z_TYPE_P(op1) == IS_TRUE) {
            return zend_is_true(op2) ? 0 : 1;
          } else if (Z_TYPE_P(op2) < IS_TRUE) {
            return zend_is_true(op1) ? 1 : 0;
          } else if (Z_TYPE_P(op2) == IS_TRUE) {
            return zend_is_true(op1) ? 0 : -1;
          } else {
            op1 = _zendi_convert_scalar_to_number_silent(op1, &op1_copy);
            op2 = _zendi_convert_scalar_to_number_silent(op2, &op2_copy);
            if (EG(exception)) {
              return 1; /* to stop comparison of arrays */
            }
            converted = true;
          }
        } else if (Z_TYPE_P(op1)==IS_ARRAY) {
          return 1;
        } else if (Z_TYPE_P(op2)==IS_ARRAY) {
          return -1;
        } else {
          ZEND_UNREACHABLE();
          zend_throw_error(NULL, "Unsupported operand types");
          return 1;
        }
    }
  }
}
/* }}} */

/* return int to be compatible with compare_func_t */
static int hash_zval_identical_function(const zval *z1, const zval *z2) /* {{{ */
{
  /* is_identical_function() returns 1 in case of identity and 0 in case
   * of a difference;
   * whereas this comparison function is expected to return 0 on identity,
   * and non zero otherwise.
   */
  ZVAL_DEREF(z1);
  ZVAL_DEREF(z2);
  return fast_is_not_identical_function(z1, z2);
}
/* }}} */

ZEND_API bool ZEND_FASTCALL zend_is_identical(const zval *op1, const zval *op2) /* {{{ */
{
  if (Z_TYPE_P(op1) != Z_TYPE_P(op2)) {
    return 0;
  }
  switch (Z_TYPE_P(op1)) {
    case IS_NULL:
    case IS_FALSE:
    case IS_TRUE:
      return 1;
    case IS_LONG:
      return (Z_LVAL_P(op1) == Z_LVAL_P(op2));
    case IS_RESOURCE:
      return (Z_RES_P(op1) == Z_RES_P(op2));
    case IS_DOUBLE:
      return (Z_DVAL_P(op1) == Z_DVAL_P(op2));
    case IS_STRING:
      return zend_string_equals(Z_STR_P(op1), Z_STR_P(op2));
    case IS_ARRAY:
      return (Z_ARRVAL_P(op1) == Z_ARRVAL_P(op2) ||
        zend_hash_compare(Z_ARRVAL_P(op1), Z_ARRVAL_P(op2), (compare_func_t) hash_zval_identical_function, 1) == 0);
    case IS_OBJECT:
      return (Z_OBJ_P(op1) == Z_OBJ_P(op2));
    default:
      return 0;
  }
}
/* }}} */

ZEND_API zend_result ZEND_FASTCALL is_identical_function(zval *result, const zval *op1, const zval *op2) /* {{{ */
{
  ZVAL_BOOL(result, zend_is_identical(op1, op2));
  return SUCCESS;
}
/* }}} */

ZEND_API zend_result ZEND_FASTCALL is_not_identical_function(zval *result, const zval *op1, const zval *op2) /* {{{ */
{
  ZVAL_BOOL(result, !zend_is_identical(op1, op2));
  return SUCCESS;
}
/* }}} */

ZEND_API zend_result ZEND_FASTCALL is_equal_function(zval *result, zval *op1, zval *op2) /* {{{ */
{
  ZVAL_BOOL(result, zend_compare(op1, op2) == 0);
  return SUCCESS;
}
/* }}} */

ZEND_API zend_result ZEND_FASTCALL is_not_equal_function(zval *result, zval *op1, zval *op2) /* {{{ */
{
  ZVAL_BOOL(result, (zend_compare(op1, op2) != 0));
  return SUCCESS;
}
/* }}} */

ZEND_API zend_result ZEND_FASTCALL is_smaller_function(zval *result, zval *op1, zval *op2) /* {{{ */
{
  ZVAL_BOOL(result, (zend_compare(op1, op2) < 0));
  return SUCCESS;
}
/* }}} */

ZEND_API zend_result ZEND_FASTCALL is_smaller_or_equal_function(zval *result, zval *op1, zval *op2) /* {{{ */
{
  ZVAL_BOOL(result, (zend_compare(op1, op2) <= 0));
  return SUCCESS;
}
/* }}} */

ZEND_API bool ZEND_FASTCALL zend_class_implements_interface(const zend_class_entry *class_ce, const zend_class_entry *interface_ce) /* {{{ */
{
  uint32_t i;
  ZEND_ASSERT(interface_ce->ce_flags & ZEND_ACC_INTERFACE);

  if (class_ce->num_interfaces) {
    ZEND_ASSERT(class_ce->ce_flags & ZEND_ACC_RESOLVED_INTERFACES);
    for (i = 0; i < class_ce->num_interfaces; i++) {
      if (class_ce->interfaces[i] == interface_ce) {
        return 1;
      }
    }
  }
  return 0;
}
/* }}} */

ZEND_API bool ZEND_FASTCALL instanceof_function_slow(const zend_class_entry *instance_ce, const zend_class_entry *ce) /* {{{ */
{
  ZEND_ASSERT(instance_ce != ce && "Should have been checked already");
  if (ce->ce_flags & ZEND_ACC_INTERFACE) {
    uint32_t i;

    if (instance_ce->num_interfaces) {
      ZEND_ASSERT(instance_ce->ce_flags & ZEND_ACC_RESOLVED_INTERFACES);
      for (i = 0; i < instance_ce->num_interfaces; i++) {
        if (instance_ce->interfaces[i] == ce) {
          return 1;
        }
      }
    }
    return 0;
  } else {
    while (1) {
      instance_ce = instance_ce->parent;
      if (instance_ce == ce) {
        return 1;
      }
      if (instance_ce == NULL) {
        return 0;
      }
    }
  }
}
/* }}} */

#define LOWER_CASE 1
#define UPPER_CASE 2
#define NUMERIC 3

ZEND_API bool zend_string_only_has_ascii_alphanumeric(const zend_string *str)
{
  const char *p = ZSTR_VAL(str);
  const char *e = ZSTR_VAL(str) + ZSTR_LEN(str);
  while (p < e) {
    char c = *p++;
    if (UNEXPECTED( c < '0' || c > 'z' || (c < 'a' && c > 'Z') || (c < 'A' && c > '9') ) ) {
      return false;
    }
  }
  return true;
}

static bool ZEND_FASTCALL increment_string(zval *str) /* {{{ */
{
  int carry=0;
  size_t pos=Z_STRLEN_P(str)-1;
  char *s;
  zend_string *t;
  int last=0; /* Shut up the compiler warning */
  int ch;

  zend_string *zstr = Z_STR_P(str);
  zend_string_addref(zstr);
  zend_error(E_DEPRECATED, "Increment on non-numeric string is deprecated, use str_increment() instead");
  if (EG(exception)) {
    zend_string_release(zstr);
    return false;
  }
  /* A userland error handler can change the type from string to something else */
  zval_ptr_dtor(str);
  ZVAL_STR(str, zstr);

  if (UNEXPECTED(Z_STRLEN_P(str) == 0)) {
    zval_ptr_dtor(str);
    ZVAL_CHAR(str, '1');
    return true;
  }

  if (!Z_REFCOUNTED_P(str)) {
    Z_STR_P(str) = zend_string_init(Z_STRVAL_P(str), Z_STRLEN_P(str), 0);
    Z_TYPE_INFO_P(str) = IS_STRING_EX;
  } else if (Z_REFCOUNT_P(str) > 1) {
    /* Only release string after allocation succeeded. */
    zend_string *orig_str = Z_STR_P(str);
    Z_STR_P(str) = zend_string_init(Z_STRVAL_P(str), Z_STRLEN_P(str), 0);
    GC_DELREF(orig_str);
  } else {
    zend_string_forget_hash_val(Z_STR_P(str));
  }
  s = Z_STRVAL_P(str);

  do {
    ch = s[pos];
    if (ch >= 'a' && ch <= 'z') {
      if (ch == 'z') {
        s[pos] = 'a';
        carry=1;
      } else {
        s[pos]++;
        carry=0;
      }
      last=LOWER_CASE;
    } else if (ch >= 'A' && ch <= 'Z') {
      if (ch == 'Z') {
        s[pos] = 'A';
        carry=1;
      } else {
        s[pos]++;
        carry=0;
      }
      last=UPPER_CASE;
    } else if (ch >= '0' && ch <= '9') {
      if (ch == '9') {
        s[pos] = '0';
        carry=1;
      } else {
        s[pos]++;
        carry=0;
      }
      last = NUMERIC;
    } else {
      carry=0;
      break;
    }
    if (carry == 0) {
      break;
    }
  } while (pos-- > 0);

  if (carry) {
    t = zend_string_alloc(Z_STRLEN_P(str)+1, 0);
    memcpy(ZSTR_VAL(t) + 1, Z_STRVAL_P(str), Z_STRLEN_P(str));
    ZSTR_VAL(t)[Z_STRLEN_P(str) + 1] = '\0';
    switch (last) {
      case NUMERIC:
        ZSTR_VAL(t)[0] = '1';
        break;
      case UPPER_CASE:
        ZSTR_VAL(t)[0] = 'A';
        break;
      case LOWER_CASE:
        ZSTR_VAL(t)[0] = 'a';
        break;
    }
    zend_string_free(Z_STR_P(str));
    ZVAL_NEW_STR(str, t);
  }
  return true;
}
/* }}} */

ZEND_API zend_result ZEND_FASTCALL increment_function(zval *op1) /* {{{ */
{
try_again:
  switch (Z_TYPE_P(op1)) {
    case IS_LONG:
      fast_long_increment_function(op1);
      break;
    case IS_DOUBLE:
      Z_DVAL_P(op1) = Z_DVAL_P(op1) + 1;
      break;
    case IS_NULL:
      ZVAL_LONG(op1, 1);
      break;
    case IS_STRING: {
        zend_long lval;
        double dval;

        switch (is_numeric_str_function(Z_STR_P(op1), &lval, &dval)) {
          case IS_LONG:
            zval_ptr_dtor_str(op1);
            if (lval == ZEND_LONG_MAX) {
              /* switch to double */
              double d = (double)lval;
              ZVAL_DOUBLE(op1, d+1);
            } else {
              ZVAL_LONG(op1, lval+1);
            }
            break;
          case IS_DOUBLE:
            zval_ptr_dtor_str(op1);
            ZVAL_DOUBLE(op1, dval+1);
            break;
          default:
            /* Perl style string increment */
            increment_string(op1);
            if (EG(exception)) {
              return FAILURE;
            }
            break;
        }
      }
      break;
    case IS_FALSE:
    case IS_TRUE: {
      /* Error handler can undef/change type of op1, save it and reset it in case those cases */
      zval copy;
      ZVAL_COPY_VALUE(&copy, op1);
      zend_error(E_WARNING, "Increment on type bool has no effect, this will change in the next major version of PHP");
      zval_ptr_dtor(op1);
      ZVAL_COPY_VALUE(op1, &copy);
      if (EG(exception)) {
        return FAILURE;
      }
      break;
    }
    case IS_REFERENCE:
      op1 = Z_REFVAL_P(op1);
      goto try_again;
    case IS_OBJECT: {
      if (Z_OBJ_HANDLER_P(op1, do_operation)) {
        zval op2;
        ZVAL_LONG(&op2, 1);
        if (Z_OBJ_HANDLER_P(op1, do_operation)(ZEND_ADD, op1, op1, &op2) == SUCCESS) {
          return SUCCESS;
        }
      }
      zval tmp;
      if (Z_OBJ_HT_P(op1)->cast_object(Z_OBJ_P(op1), &tmp, _IS_NUMBER) == SUCCESS) {
        ZEND_ASSERT(Z_TYPE(tmp) == IS_LONG || Z_TYPE(tmp) == IS_DOUBLE);
        zval_ptr_dtor(op1);
        ZVAL_COPY_VALUE(op1, &tmp);
        goto try_again;
      }
      ZEND_FALLTHROUGH;
    }
    case IS_RESOURCE:
    case IS_ARRAY:
      zend_type_error("Cannot increment %s", zend_zval_value_name(op1));
      return FAILURE;
    default: ZEND_UNREACHABLE();
  }
  return SUCCESS;
}
/* }}} */

ZEND_API zend_result ZEND_FASTCALL decrement_function(zval *op1) /* {{{ */
{
  zend_long lval;
  double dval;

try_again:
  switch (Z_TYPE_P(op1)) {
    case IS_LONG:
      fast_long_decrement_function(op1);
      break;
    case IS_DOUBLE:
      Z_DVAL_P(op1) = Z_DVAL_P(op1) - 1;
      break;
    case IS_STRING:   /* Like perl we only support string increment */
      if (Z_STRLEN_P(op1) == 0) { /* consider as 0 */
        zend_error(E_DEPRECATED, "Decrement on empty string is deprecated as non-numeric");
        if (EG(exception)) {
          return FAILURE;
        }
        /* A userland error handler can change the type from string to something else */
        zval_ptr_dtor(op1);
        ZVAL_LONG(op1, -1);
        break;
      }
      switch (is_numeric_str_function(Z_STR_P(op1), &lval, &dval)) {
        case IS_LONG:
          zval_ptr_dtor_str(op1);
          if (lval == ZEND_LONG_MIN) {
            double d = (double)lval;
            ZVAL_DOUBLE(op1, d-1);
          } else {
            ZVAL_LONG(op1, lval-1);
          }
          break;
        case IS_DOUBLE:
          zval_ptr_dtor_str(op1);
          ZVAL_DOUBLE(op1, dval - 1);
          break;
        default: {
          /* Error handler can unset the variable */
          zend_string *zstr = Z_STR_P(op1);
          zend_string_addref(zstr);
          zend_error(E_DEPRECATED, "Decrement on non-numeric string has no effect and is deprecated");
          if (EG(exception)) {
            zend_string_release(zstr);
            return FAILURE;
          }
          zval_ptr_dtor(op1);
          ZVAL_STR(op1, zstr);
        }
      }
      break;
    case IS_NULL: {
      /* Error handler can undef/change type of op1, save it and reset it in case those cases */
      zval copy;
      ZVAL_COPY_VALUE(&copy, op1);
      zend_error(E_WARNING, "Decrement on type null has no effect, this will change in the next major version of PHP");
      zval_ptr_dtor(op1);
      ZVAL_COPY_VALUE(op1, &copy);
      if (EG(exception)) {
        return FAILURE;
      }
      break;
    }
    case IS_FALSE:
    case IS_TRUE: {
      /* Error handler can undef/change type of op1, save it and reset it in case those cases */
      zval copy;
      ZVAL_COPY_VALUE(&copy, op1);
      zend_error(E_WARNING, "Decrement on type bool has no effect, this will change in the next major version of PHP");
      zval_ptr_dtor(op1);
      ZVAL_COPY_VALUE(op1, &copy);
      if (EG(exception)) {
        return FAILURE;
      }
      break;
    }
    case IS_REFERENCE:
      op1 = Z_REFVAL_P(op1);
      goto try_again;
    case IS_OBJECT: {
      if (Z_OBJ_HANDLER_P(op1, do_operation)) {
        zval op2;
        ZVAL_LONG(&op2, 1);
        if (Z_OBJ_HANDLER_P(op1, do_operation)(ZEND_SUB, op1, op1, &op2) == SUCCESS) {
          return SUCCESS;
        }
      }
      zval tmp;
      if (Z_OBJ_HT_P(op1)->cast_object(Z_OBJ_P(op1), &tmp, _IS_NUMBER) == SUCCESS) {
        ZEND_ASSERT(Z_TYPE(tmp) == IS_LONG || Z_TYPE(tmp) == IS_DOUBLE);
        zval_ptr_dtor(op1);
        ZVAL_COPY_VALUE(op1, &tmp);
        goto try_again;
      }
      ZEND_FALLTHROUGH;
    }
    case IS_RESOURCE:
    case IS_ARRAY:
      zend_type_error("Cannot decrement %s", zend_zval_value_name(op1));
      return FAILURE;
    default: ZEND_UNREACHABLE();
  }

  return SUCCESS;
}
/* }}} */

ZEND_API bool ZEND_FASTCALL zend_is_true(const zval *op) /* {{{ */
{
  return i_zend_is_true(op);
}
/* }}} */

ZEND_API bool ZEND_FASTCALL zend_object_is_true(const zval *op) /* {{{ */
{
  zend_object *zobj = Z_OBJ_P(op);
  zval tmp;
  if (zobj->handlers->cast_object(zobj, &tmp, _IS_BOOL) == SUCCESS) {
    return Z_TYPE(tmp) == IS_TRUE;
  }
  zend_error(E_RECOVERABLE_ERROR, "Object of class %s could not be converted to bool", ZSTR_VAL(zobj->ce->name));
  return false;
}
/* }}} */

ZEND_API void zend_update_current_locale(void) /* {{{ */
{
#ifdef ZEND_USE_TOLOWER_L
# if defined(ZEND_WIN32) && defined(_MSC_VER)
  current_locale = _get_current_locale();
# else
  current_locale = uselocale(0);
# endif
#endif
#if defined(ZEND_WIN32) && defined(_MSC_VER)
  if (MB_CUR_MAX > 1) {
    unsigned int cp = ___lc_codepage_func();
    CG(variable_width_locale) = 1;
    // TODO: EUC-* are also ASCII compatible ???
    CG(ascii_compatible_locale) =
      cp == 65001; /* UTF-8 */
  } else {
    CG(variable_width_locale) = 0;
    CG(ascii_compatible_locale) = 1;
  }
#elif defined(MB_CUR_MAX)
  /* Check if current locale uses variable width encoding */
  if (MB_CUR_MAX > 1) {
#ifdef HAVE_NL_LANGINFO
    const char *charmap = nl_langinfo(CODESET);
#else
    char buf[16];
    const char *charmap = NULL;
    const char *locale = setlocale(LC_CTYPE, NULL);

    if (locale) {
      const char *dot = strchr(locale, '.');
      const char *modifier;

      if (dot) {
        dot++;
        modifier = strchr(dot, '@');
        if (!modifier) {
          charmap = dot;
        } else if (modifier - dot < sizeof(buf)) {
          memcpy(buf, dot, modifier - dot);
                    buf[modifier - dot] = '\0';
                    charmap = buf;
        }
      }
    }
#endif
    CG(variable_width_locale) = 1;
    CG(ascii_compatible_locale) = 0;

    if (charmap) {
      size_t len = strlen(charmap);
      static const char *ascii_compatible_charmaps[] = {
        "utf-8",
        "utf8",
        // TODO: EUC-* are also ASCII compatible ???
        NULL
      };
      const char **p;
      /* Check if current locale is ASCII compatible */
      for (p = ascii_compatible_charmaps; *p; p++) {
        if (zend_binary_strcasecmp(charmap, len, *p, strlen(*p)) == 0) {
          CG(ascii_compatible_locale) = 1;
          break;
        }
      }
    }

  } else {
    CG(variable_width_locale) = 0;
    CG(ascii_compatible_locale) = 1;
  }
#else
  /* We can't determine current charset. Assume the worst case */
  CG(variable_width_locale) = 1;
  CG(ascii_compatible_locale) = 0;
#endif
}
/* }}} */

ZEND_API void zend_reset_lc_ctype_locale(void)
{
  /* Use the C.UTF-8 locale so that readline can process UTF-8 input, while not interfering
   * with single-byte locale-dependent functions used by PHP. */
  if (!setlocale(LC_CTYPE, "C.UTF-8")) {
    setlocale(LC_CTYPE, "C");
  }
}

static zend_always_inline void zend_str_tolower_impl(char *dest, const char *str, size_t length) /* {{{ */ {
  unsigned char *p = (unsigned char*)str;
  unsigned char *q = (unsigned char*)dest;
  unsigned char *end = p + length;
#ifdef HAVE_BLOCKCONV
  if (length >= BLOCKCONV_STRIDE) {
    BLOCKCONV_INIT_RANGE('A', 'Z');
    BLOCKCONV_INIT_DELTA('a' - 'A');
    do {
      BLOCKCONV_LOAD(p);
      BLOCKCONV_STORE(q);
      p += BLOCKCONV_STRIDE;
      q += BLOCKCONV_STRIDE;
    } while (p + BLOCKCONV_STRIDE <= end);
  }
#endif
  while (p < end) {
    *q++ = zend_tolower_ascii(*p++);
  }
}
/* }}} */

static zend_always_inline void zend_str_toupper_impl(char *dest, const char *str, size_t length) /* {{{ */ {
  unsigned char *p = (unsigned char*)str;
  unsigned char *q = (unsigned char*)dest;
  unsigned char *end = p + length;
#ifdef HAVE_BLOCKCONV
  if (length >= BLOCKCONV_STRIDE) {
    BLOCKCONV_INIT_RANGE('a', 'z');
    BLOCKCONV_INIT_DELTA('A' - 'a');
    do {
      BLOCKCONV_LOAD(p);
      BLOCKCONV_STORE(q);
      p += BLOCKCONV_STRIDE;
      q += BLOCKCONV_STRIDE;
    } while (p + BLOCKCONV_STRIDE <= end);
  }
#endif
  while (p < end) {
    *q++ = zend_toupper_ascii(*p++);
  }
}
/* }}} */

ZEND_API char* ZEND_FASTCALL zend_str_tolower_copy(char *dest, const char *source, size_t length) /* {{{ */
{
  zend_str_tolower_impl(dest, source, length);
  dest[length] = '\0';
  return dest;
}
/* }}} */

ZEND_API char* ZEND_FASTCALL zend_str_toupper_copy(char *dest, const char *source, size_t length) /* {{{ */
{
  zend_str_toupper_impl(dest, source, length);
  dest[length] = '\0';
  return dest;
}
/* }}} */

ZEND_API char* ZEND_FASTCALL zend_str_tolower_dup(const char *source, size_t length) /* {{{ */
{
  return zend_str_tolower_copy((char *)emalloc(length+1), source, length);
}
/* }}} */

ZEND_API char* ZEND_FASTCALL zend_str_toupper_dup(const char *source, size_t length) /* {{{ */
{
  return zend_str_toupper_copy((char *)emalloc(length+1), source, length);
}
/* }}} */

ZEND_API void ZEND_FASTCALL zend_str_tolower(char *str, size_t length) /* {{{ */
{
  zend_str_tolower_impl(str, (const char*)str, length);
}
/* }}} */

ZEND_API void ZEND_FASTCALL zend_str_toupper(char *str, size_t length) /* {{{ */
{
  zend_str_toupper_impl(str, (const char*)str, length);
}
/* }}} */


ZEND_API char* ZEND_FASTCALL zend_str_tolower_dup_ex(const char *source, size_t length) /* {{{ */
{
  const unsigned char *p = (const unsigned char*)source;
  const unsigned char *end = p + length;

  while (p < end) {
    if (*p != zend_tolower_ascii(*p)) {
      char *res = (char*)emalloc(length + 1);
      unsigned char *r;

      if (p != (const unsigned char*)source) {
        memcpy(res, source, p - (const unsigned char*)source);
      }
      r = (unsigned char*)p + (res - source);
      zend_str_tolower_impl((char *)r, (const char*)p, end - p);
      res[length] = '\0';
      return res;
    }
    p++;
  }
  return NULL;
}
/* }}} */

ZEND_API char* ZEND_FASTCALL zend_str_toupper_dup_ex(const char *source, size_t length) /* {{{ */
{
  const unsigned char *p = (const unsigned char*)source;
  const unsigned char *end = p + length;

  while (p < end) {
    if (*p != zend_toupper_ascii(*p)) {
      char *res = (char*)emalloc(length + 1);
      unsigned char *r;

      if (p != (const unsigned char*)source) {
        memcpy(res, source, p - (const unsigned char*)source);
      }
      r = (unsigned char*)p + (res - source);
      zend_str_toupper_impl((char *)r, (const char*)p, end - p);
      res[length] = '\0';
      return res;
    }
    p++;
  }
  return NULL;
}
/* }}} */

static zend_always_inline zend_string* ZEND_FASTCALL _zend_string_ftolower_ex(zend_string *str, bool persistent, bool fallible)
{
  size_t length = ZSTR_LEN(str);
  unsigned char *p = (unsigned char *) ZSTR_VAL(str);
  unsigned char *end = p + length;

#ifdef HAVE_BLOCKCONV
  BLOCKCONV_INIT_RANGE('A', 'Z');
  while (p + BLOCKCONV_STRIDE <= end) {
    BLOCKCONV_LOAD(p);
    if (BLOCKCONV_FOUND()) {
      zend_string *res = zend_string_falloc(length, persistent, fallible);
      if (ZEND_CONST_COND(fallible, true) && UNEXPECTED(!res)) {
        return NULL;
      }
      memcpy(ZSTR_VAL(res), ZSTR_VAL(str), p - (unsigned char *) ZSTR_VAL(str));
      unsigned char *q = (unsigned char*) ZSTR_VAL(res) + (p - (unsigned char*) ZSTR_VAL(str));

      /* Lowercase the chunk we already compared. */
      BLOCKCONV_INIT_DELTA('a' - 'A');
      BLOCKCONV_STORE(q);

      /* Lowercase the rest of the string. */
      p += BLOCKCONV_STRIDE;
      q += BLOCKCONV_STRIDE;
      zend_str_tolower_impl((char *) q, (const char *) p, end - p);
      ZSTR_VAL(res)[length] = '\0';
      return res;
    }
    p += BLOCKCONV_STRIDE;
  }
#endif

  while (p < end) {
    if (*p != zend_tolower_ascii(*p)) {
      zend_string *res = zend_string_falloc(length, persistent, fallible);
      if (ZEND_CONST_COND(fallible, true) && UNEXPECTED(!res)) {
        return NULL;
      }
      memcpy(ZSTR_VAL(res), ZSTR_VAL(str), p - (unsigned char*) ZSTR_VAL(str));

      unsigned char *q = (unsigned char*) ZSTR_VAL(res) + (p - (unsigned char*) ZSTR_VAL(str));
      while (p < end) {
        *q++ = zend_tolower_ascii(*p++);
      }
      ZSTR_VAL(res)[length] = '\0';
      return res;
    }
    p++;
  }

  return zend_string_copy(str);
}

ZEND_API zend_string* ZEND_FASTCALL zend_string_tolower_ex(zend_string *str, bool persistent) /* {{{ */
{
  return _zend_string_ftolower_ex(str, persistent, /* fallible */ false);
}
/* }}} */

ZEND_API zend_string* ZEND_FASTCALL zend_string_ftolower_ex(zend_string *str, bool persistent)
{
  return _zend_string_ftolower_ex(str, persistent, /* fallible */ true);
}

ZEND_API zend_string* ZEND_FASTCALL zend_string_toupper_ex(zend_string *str, bool persistent) /* {{{ */
{
  size_t length = ZSTR_LEN(str);
  unsigned char *p = (unsigned char *) ZSTR_VAL(str);
  unsigned char *end = p + length;

#ifdef HAVE_BLOCKCONV
  BLOCKCONV_INIT_RANGE('a', 'z');
  while (p + BLOCKCONV_STRIDE <= end) {
    BLOCKCONV_LOAD(p);
    if (BLOCKCONV_FOUND()) {
      zend_string *res = zend_string_alloc(length, persistent);
      memcpy(ZSTR_VAL(res), ZSTR_VAL(str), p - (unsigned char *) ZSTR_VAL(str));
      unsigned char *q = (unsigned char *) ZSTR_VAL(res) + (p - (unsigned char *) ZSTR_VAL(str));

      /* Uppercase the chunk we already compared. */
      BLOCKCONV_INIT_DELTA('A' - 'a');
      BLOCKCONV_STORE(q);

      /* Uppercase the rest of the string. */
      p += BLOCKCONV_STRIDE;
      q += BLOCKCONV_STRIDE;
      zend_str_toupper_impl((char *) q, (const char *) p, end - p);
      ZSTR_VAL(res)[length] = '\0';
      return res;
    }
    p += BLOCKCONV_STRIDE;
  }
#endif

  while (p < end) {
    if (*p != zend_toupper_ascii(*p)) {
      zend_string *res = zend_string_alloc(length, persistent);
      memcpy(ZSTR_VAL(res), ZSTR_VAL(str), p - (unsigned char*) ZSTR_VAL(str));

      unsigned char *q = (unsigned char *) ZSTR_VAL(res) + (p - (unsigned char *) ZSTR_VAL(str));
      while (p < end) {
        *q++ = zend_toupper_ascii(*p++);
      }
      ZSTR_VAL(res)[length] = '\0';
      return res;
    }
    p++;
  }

  return zend_string_copy(str);
}
/* }}} */

ZEND_API int ZEND_FASTCALL zend_binary_strcmp(const char *s1, size_t len1, const char *s2, size_t len2) /* {{{ */
{
  int retval;

  if (s1 == s2) {
    return 0;
  }
  retval = memcmp(s1, s2, MIN(len1, len2));
  if (!retval) {
    return ZEND_THREEWAY_COMPARE(len1, len2);
  } else {
    return retval;
  }
}
/* }}} */

ZEND_API int ZEND_FASTCALL zend_binary_strncmp(const char *s1, size_t len1, const char *s2, size_t len2, size_t length) /* {{{ */
{
  int retval;

  if (s1 == s2) {
    return 0;
  }
  retval = memcmp(s1, s2, MIN(length, MIN(len1, len2)));
  if (!retval) {
    return ZEND_THREEWAY_COMPARE(MIN(length, len1), MIN(length, len2));
  } else {
    return retval;
  }
}
/* }}} */

ZEND_API int ZEND_FASTCALL zend_binary_strcasecmp(const char *s1, size_t len1, const char *s2, size_t len2) /* {{{ */
{
  size_t len;
  int c1, c2;

  if (s1 == s2) {
    return 0;
  }

  len = MIN(len1, len2);
  while (len--) {
    c1 = zend_tolower_ascii(*(unsigned char *)s1++);
    c2 = zend_tolower_ascii(*(unsigned char *)s2++);
    if (c1 != c2) {
      return c1 - c2;
    }
  }

  return ZEND_THREEWAY_COMPARE(len1, len2);
}
/* }}} */

ZEND_API int ZEND_FASTCALL zend_binary_strncasecmp(const char *s1, size_t len1, const char *s2, size_t len2, size_t length) /* {{{ */
{
  size_t len;
  int c1, c2;

  if (s1 == s2) {
    return 0;
  }
  len = MIN(length, MIN(len1, len2));
  while (len--) {
    c1 = zend_tolower_ascii(*(unsigned char *)s1++);
    c2 = zend_tolower_ascii(*(unsigned char *)s2++);
    if (c1 != c2) {
      return c1 - c2;
    }
  }

  return ZEND_THREEWAY_COMPARE(MIN(length, len1), MIN(length, len2));
}
/* }}} */

ZEND_API int ZEND_FASTCALL zend_binary_strcasecmp_l(const char *s1, size_t len1, const char *s2, size_t len2) /* {{{ */
{
  size_t len;
  int c1, c2;

  if (s1 == s2) {
    return 0;
  }

  len = MIN(len1, len2);
  while (len--) {
    c1 = zend_tolower((unsigned char)*(s1++));
    c2 = zend_tolower((unsigned char)*(s2++));
    if (c1 != c2) {
      return c1 - c2;
    }
  }

  return ZEND_THREEWAY_COMPARE(len1, len2);
}
/* }}} */

ZEND_API int ZEND_FASTCALL zend_binary_strncasecmp_l(const char *s1, size_t len1, const char *s2, size_t len2, size_t length) /* {{{ */
{
  size_t len;
  int c1, c2;

  if (s1 == s2) {
    return 0;
  }
  len = MIN(length, MIN(len1, len2));
  while (len--) {
    c1 = zend_tolower((unsigned char)*(s1++));
    c2 = zend_tolower((unsigned char)*(s2++));
    if (c1 != c2) {
      return c1 - c2;
    }
  }

  return ZEND_THREEWAY_COMPARE(MIN(length, len1), MIN(length, len2));
}
/* }}} */

ZEND_API bool ZEND_FASTCALL zendi_smart_streq(const zend_string *s1, const zend_string *s2) /* {{{ */
{
  uint8_t ret1, ret2;
  int oflow1, oflow2;
  zend_long lval1 = 0, lval2 = 0;
  double dval1 = 0.0, dval2 = 0.0;

  if ((ret1 = is_numeric_string_ex(s1->val, s1->len, &lval1, &dval1, false, &oflow1, NULL)) &&
    (ret2 = is_numeric_string_ex(s2->val, s2->len, &lval2, &dval2, false, &oflow2, NULL))) {
#if ZEND_ULONG_MAX == 0xFFFFFFFF
    if (oflow1 != 0 && oflow1 == oflow2 && dval1 - dval2 == 0. &&
      ((oflow1 == 1 && dval1 > 9007199254740991. /*0x1FFFFFFFFFFFFF*/)
      || (oflow1 == -1 && dval1 < -9007199254740991.))) {
#else
    if (oflow1 != 0 && oflow1 == oflow2 && dval1 - dval2 == 0.) {
#endif
      /* both values are integers overflown to the same side, and the
       * double comparison may have resulted in crucial accuracy lost */
      goto string_cmp;
    }
    if ((ret1 == IS_DOUBLE) || (ret2 == IS_DOUBLE)) {
      if (ret1 != IS_DOUBLE) {
        if (oflow2) {
          /* 2nd operand is integer > LONG_MAX (oflow2==1) or < LONG_MIN (-1) */
          return 0;
        }
        dval1 = (double) lval1;
      } else if (ret2 != IS_DOUBLE) {
        if (oflow1) {
          return 0;
        }
        dval2 = (double) lval2;
      } else if (dval1 == dval2 && !zend_finite(dval1)) {
        /* Both values overflowed and have the same sign,
         * so a numeric comparison would be inaccurate */
        goto string_cmp;
      }
      return dval1 == dval2;
    } else { /* they both have to be long's */
      return lval1 == lval2;
    }
  } else {
string_cmp:
    return zend_string_equal_content(s1, s2);
  }
}
/* }}} */

ZEND_API int ZEND_FASTCALL zendi_smart_strcmp(const zend_string *s1, const zend_string *s2) /* {{{ */
{
  uint8_t ret1, ret2;
  int oflow1, oflow2;
  zend_long lval1 = 0, lval2 = 0;
  double dval1 = 0.0, dval2 = 0.0;

  if ((ret1 = is_numeric_string_ex(s1->val, s1->len, &lval1, &dval1, false, &oflow1, NULL)) &&
    (ret2 = is_numeric_string_ex(s2->val, s2->len, &lval2, &dval2, false, &oflow2, NULL))) {
#if ZEND_ULONG_MAX == 0xFFFFFFFF
    if (oflow1 != 0 && oflow1 == oflow2 && dval1 - dval2 == 0. &&
      ((oflow1 == 1 && dval1 > 9007199254740991. /*0x1FFFFFFFFFFFFF*/)
      || (oflow1 == -1 && dval1 < -9007199254740991.))) {
#else
    if (oflow1 != 0 && oflow1 == oflow2 && dval1 - dval2 == 0.) {
#endif
      /* both values are integers overflowed to the same side, and the
       * double comparison may have resulted in crucial accuracy lost */
      goto string_cmp;
    }
    if ((ret1 == IS_DOUBLE) || (ret2 == IS_DOUBLE)) {
      if (ret1 != IS_DOUBLE) {
        if (oflow2) {
          /* 2nd operand is integer > LONG_MAX (oflow2==1) or < LONG_MIN (-1) */
          return -1 * oflow2;
        }
        dval1 = (double) lval1;
      } else if (ret2 != IS_DOUBLE) {
        if (oflow1) {
          return oflow1;
        }
        dval2 = (double) lval2;
      } else if (dval1 == dval2 && !zend_finite(dval1)) {
        /* Both values overflowed and have the same sign,
         * so a numeric comparison would be inaccurate */
        goto string_cmp;
      }
      dval1 = dval1 - dval2;
      return ZEND_NORMALIZE_BOOL(dval1);
    } else { /* they both have to be long's */
      return lval1 > lval2 ? 1 : (lval1 < lval2 ? -1 : 0);
    }
  } else {
    int strcmp_ret;
string_cmp:
    strcmp_ret = zend_binary_strcmp(s1->val, s1->len, s2->val, s2->len);
    return ZEND_NORMALIZE_BOOL(strcmp_ret);
  }
}
/* }}} */

static int hash_zval_compare_function(zval *z1, zval *z2) /* {{{ */
{
  return zend_compare(z1, z2);
}
/* }}} */

ZEND_API int ZEND_FASTCALL zend_compare_symbol_tables(HashTable *ht1, HashTable *ht2) /* {{{ */
{
  if (ht1 == ht2) {
    return 0;
  }

  GC_TRY_ADDREF(ht1);
  GC_TRY_ADDREF(ht2);

  int ret = zend_hash_compare(ht1, ht2, (compare_func_t) hash_zval_compare_function, 0);

  GC_TRY_DTOR_NO_REF(ht1);
  GC_TRY_DTOR_NO_REF(ht2);

  return ret;
}
/* }}} */

ZEND_API int ZEND_FASTCALL zend_compare_arrays(const zval *a1, const zval *a2) /* {{{ */
{
  return zend_compare_symbol_tables(Z_ARRVAL_P(a1), Z_ARRVAL_P(a2));
}
/* }}} */

ZEND_API int ZEND_FASTCALL zend_compare_objects(zval *o1, zval *o2) /* {{{ */
{
  if (Z_OBJ_P(o1) == Z_OBJ_P(o2)) {
    return 0;
  }

  if (Z_OBJ_HT_P(o1)->compare == NULL) {
    return 1;
  } else {
    return Z_OBJ_HT_P(o1)->compare(o1, o2);
  }
}
/* }}} */

ZEND_API zend_string* ZEND_FASTCALL zend_long_to_str(zend_long num) /* {{{ */
{
  if ((zend_ulong)num <= 9) {
    return ZSTR_CHAR((zend_uchar)'0' + (zend_uchar)num);
  } else {
    char buf[MAX_LENGTH_OF_LONG + 1];
    char *res = zend_print_long_to_buf(buf + sizeof(buf) - 1, num);
    zend_string *str =  zend_string_init(res, buf + sizeof(buf) - 1 - res, 0);
    GC_ADD_FLAGS(str, IS_STR_VALID_UTF8);
    return str;
  }
}
/* }}} */

ZEND_API zend_string* ZEND_FASTCALL zend_ulong_to_str(zend_ulong num)
{
  if (num <= 9) {
    return ZSTR_CHAR((zend_uchar)'0' + (zend_uchar)num);
  } else {
    char buf[MAX_LENGTH_OF_LONG + 1];
    char *res = zend_print_ulong_to_buf(buf + sizeof(buf) - 1, num);
    zend_string *str =  zend_string_init(res, buf + sizeof(buf) - 1 - res, 0);
    GC_ADD_FLAGS(str, IS_STR_VALID_UTF8);
    return str;
  }
}

/* buf points to the END of the buffer */
static zend_always_inline char *zend_print_u64_to_buf(char *buf, uint64_t num64) {
#if SIZEOF_ZEND_LONG == 8
  return zend_print_ulong_to_buf(buf, num64);
#else
  *buf = '\0';
  while (num64 > ZEND_ULONG_MAX) {
    *--buf = (char) (num64 % 10) + '0';
    num64 /= 10;
  }

  zend_ulong num = (zend_ulong) num64;
  do {
    *--buf = (char) (num % 10) + '0';
    num /= 10;
  } while (num > 0);
  return buf;
#endif
}

/* buf points to the END of the buffer */
static zend_always_inline char *zend_print_i64_to_buf(char *buf, int64_t num) {
  if (num < 0) {
      char *result = zend_print_u64_to_buf(buf, ~((uint64_t) num) + 1);
      *--result = '-';
    return result;
  } else {
      return zend_print_u64_to_buf(buf, num);
  }
}

ZEND_API zend_string* ZEND_FASTCALL zend_u64_to_str(uint64_t num)
{
  if (num <= 9) {
    return ZSTR_CHAR((zend_uchar)'0' + (zend_uchar)num);
  } else {
    char buf[20 + 1];
    char *res = zend_print_u64_to_buf(buf + sizeof(buf) - 1, num);
    zend_string *str =  zend_string_init(res, buf + sizeof(buf) - 1 - res, 0);
    GC_ADD_FLAGS(str, IS_STR_VALID_UTF8);
    return str;
  }
}

ZEND_API zend_string* ZEND_FASTCALL zend_i64_to_str(int64_t num)
{
  if ((uint64_t)num <= 9) {
    return ZSTR_CHAR((zend_uchar)'0' + (zend_uchar)num);
  } else {
    char buf[20 + 1];
    char *res = zend_print_i64_to_buf(buf + sizeof(buf) - 1, num);
    zend_string *str =  zend_string_init(res, buf + sizeof(buf) - 1 - res, 0);
    GC_ADD_FLAGS(str, IS_STR_VALID_UTF8);
    return str;
  }
}

ZEND_API zend_string* ZEND_FASTCALL zend_double_to_str(double num)
{
  char buf[ZEND_DOUBLE_MAX_LENGTH];
  /* Model snprintf precision behavior. */
  int precision = (int) EG(precision);
  zend_gcvt(num, precision ? precision : 1, '.', 'E', buf);
  zend_string *str =  zend_string_init(buf, strlen(buf), 0);
  if (UNEXPECTED(zend_isnan(num))) {
    zend_nan_coerced_to_type_warning(IS_STRING);
  }
  GC_ADD_FLAGS(str, IS_STR_VALID_UTF8);
  return str;
}

ZEND_API uint8_t ZEND_FASTCALL is_numeric_str_function(const zend_string *str, zend_long *lval, double *dval) /* {{{ */
{
  return is_numeric_string(ZSTR_VAL(str), ZSTR_LEN(str), lval, dval, false);
}
/* }}} */

ZEND_API uint8_t ZEND_FASTCALL _is_numeric_string_ex(const char *str, size_t length, zend_long *lval,
  double *dval, bool allow_errors, int *oflow_info, bool *trailing_data) /* {{{ */
{
  const char *ptr;
  int digits = 0, dp_or_e = 0;
  double local_dval = 0.0;
  uint8_t type;
  zend_ulong tmp_lval = 0;
  int neg = 0;

  if (!length) {
    return 0;
  }

  if (oflow_info != NULL) {
    *oflow_info = 0;
  }
  if (trailing_data != NULL) {
    *trailing_data = false;
  }

  /* Skip any whitespace
   * This is much faster than the isspace() function */
  while (*str == ' ' || *str == '\t' || *str == '\n' || *str == '\r' || *str == '\v' || *str == '\f') {
    str++;
    length--;
  }
  ptr = str;

  if (*ptr == '-') {
    neg = 1;
    ptr++;
  } else if (*ptr == '+') {
    ptr++;
  }

  if (ZEND_IS_DIGIT(*ptr)) {
    /* Skip any leading 0s */
    while (*ptr == '0') {
      ptr++;
    }

    /* Count the number of digits. If a decimal point/exponent is found,
     * it's a double. Otherwise, if there's a dval or no need to check for
     * a full match, stop when there are too many digits for a long */
    for (type = IS_LONG; !(digits >= MAX_LENGTH_OF_LONG && (dval || allow_errors)); digits++, ptr++) {
check_digits:
      if (ZEND_IS_DIGIT(*ptr)) {
        tmp_lval = tmp_lval * 10 + (*ptr) - '0';
        continue;
      } else if (*ptr == '.' && dp_or_e < 1) {
        goto process_double;
      } else if ((*ptr == 'e' || *ptr == 'E') && dp_or_e < 2) {
        const char *e = ptr + 1;

        if (*e == '-' || *e == '+') {
          ptr = e++;
        }
        if (ZEND_IS_DIGIT(*e)) {
          goto process_double;
        }
      }

      break;
    }

    if (digits >= MAX_LENGTH_OF_LONG) {
      if (oflow_info != NULL) {
        *oflow_info = *str == '-' ? -1 : 1;
      }
      dp_or_e = -1;
      goto process_double;
    }
  } else if (*ptr == '.' && ZEND_IS_DIGIT(ptr[1])) {
process_double:
    type = IS_DOUBLE;

    /* If there's a dval, do the conversion; else continue checking
     * the digits if we need to check for a full match */
    if (dval) {
      local_dval = zend_strtod(str, &ptr);
    } else if (!allow_errors && dp_or_e != -1) {
      dp_or_e = (*ptr++ == '.') ? 1 : 2;
      goto check_digits;
    }
  } else {
    return 0;
  }

  if (ptr != str + length) {
    const char *endptr = ptr;
    while (*endptr == ' ' || *endptr == '\t' || *endptr == '\n' || *endptr == '\r' || *endptr == '\v' || *endptr == '\f') {
      endptr++;
      length--;
    }
    if (ptr != str + length) {
      if (!allow_errors) {
        return 0;
      }
      if (trailing_data != NULL) {
        *trailing_data = true;
      }
    }
  }

  if (type == IS_LONG) {
    if (digits == MAX_LENGTH_OF_LONG - 1) {
      int cmp = strcmp(&ptr[-digits], long_min_digits);

      if (!(cmp < 0 || (cmp == 0 && *str == '-'))) {
        if (dval) {
          *dval = zend_strtod(str, NULL);
        }
        if (oflow_info != NULL) {
          *oflow_info = *str == '-' ? -1 : 1;
        }

        return IS_DOUBLE;
      }
    }

    if (lval) {
      if (neg) {
        tmp_lval = -tmp_lval;
      }
      *lval = (zend_long) tmp_lval;
    }

    return IS_LONG;
  } else {
    if (dval) {
      *dval = local_dval;
    }

    return IS_DOUBLE;
  }
}
/* }}} */

/*
 * String matching - Sunday algorithm
 * http://www.iti.fh-flensburg.de/lang/algorithmen/pattern/sundayen.htm
 */
static zend_always_inline void zend_memnstr_ex_pre(unsigned int td[], const char *needle, size_t needle_len, int reverse) /* {{{ */ {
  int i;

  for (i = 0; i < 256; i++) {
    td[i] = needle_len + 1;
  }

  if (reverse) {
    for (i = needle_len - 1; i >= 0; i--) {
      td[(unsigned char)needle[i]] = i + 1;
    }
  } else {
    size_t i;

    for (i = 0; i < needle_len; i++) {
      td[(unsigned char)needle[i]] = (int)needle_len - i;
    }
  }
}
/* }}} */

ZEND_API const char* ZEND_FASTCALL zend_memnstr_ex(const char *haystack, const char *needle, size_t needle_len, const char *end) /* {{{ */
{
  unsigned int td[256];
  size_t i;
  const char *p;

  if (needle_len == 0 || (end - haystack) < needle_len) {
    return NULL;
  }

  zend_memnstr_ex_pre(td, needle, needle_len, 0);

  p = haystack;
  end -= needle_len;

  while (p <= end) {
    for (i = 0; i < needle_len; i++) {
      if (needle[i] != p[i]) {
        break;
      }
    }
    if (i == needle_len) {
      return p;
    }
    if (UNEXPECTED(p == end)) {
      return NULL;
    }
    p += td[(unsigned char)(p[needle_len])];
  }

  return NULL;
}
/* }}} */

ZEND_API const char* ZEND_FASTCALL zend_memnrstr_ex(const char *haystack, const char *needle, size_t needle_len, const char *end) /* {{{ */
{
  unsigned int td[256];
  size_t i;
  const char *p;

  if (needle_len == 0 || (end - haystack) < needle_len) {
    return NULL;
  }

  zend_memnstr_ex_pre(td, needle, needle_len, 1);

  p = end;
  p -= needle_len;

  while (p >= haystack) {
    for (i = 0; i < needle_len; i++) {
      if (needle[i] != p[i]) {
        break;
      }
    }

    if (i == needle_len) {
      return (const char *)p;
    }

    if (UNEXPECTED(p == haystack)) {
      return NULL;
    }

    p -= td[(unsigned char)(p[-1])];
  }

  return NULL;
}
/* }}} */

#if SIZEOF_ZEND_LONG == 4
ZEND_API zend_long ZEND_FASTCALL zend_dval_to_lval_slow(double d) /* {{{ */
{
  double  two_pow_32 = pow(2., 32.),
      dmod;

  dmod = fmod(d, two_pow_32);
  if (dmod < 0) {
    /* we're going to make this number positive; call ceil()
     * to simulate rounding towards 0 of the negative number */
    dmod = ceil(dmod) + two_pow_32;
  }
  return (zend_long)(zend_ulong)dmod;
}
#else
ZEND_API zend_long ZEND_FASTCALL zend_dval_to_lval_slow(double d)
{
  double  two_pow_64 = pow(2., 64.),
      dmod;

  dmod = fmod(d, two_pow_64);
  if (dmod < 0) {
    /* no need to call ceil; original double must have had no
     * fractional part, hence dmod does not have one either */
    dmod += two_pow_64;
  }
  return (zend_long)(zend_ulong)dmod;
}
/* }}} */
#endif

Coverage Report

Created: 2026-10-28 06:20