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bcmath.c
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/*
+----------------------------------------------------------------------+
| Copyright (c) The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| https://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| [email protected] so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Author: Andi Gutmans <[email protected]> |
+----------------------------------------------------------------------+
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "php.h"
#ifdef HAVE_BCMATH
#include "php_ini.h"
#include "zend_exceptions.h"
#include "zend_interfaces.h"
#include "bcmath_arginfo.h"
#include "ext/standard/info.h"
#include "php_bcmath.h"
#include "libbcmath/src/bcmath.h"
/* Always pair SETUP with TEARDOWN, and do so in the outer scope!
* Should not be used when data can escape the function. */
#define BC_ARENA_SETUP \
char bc_arena[BC_ARENA_SIZE]; \
BCG(arena) = bc_arena;
#define BC_ARENA_TEARDOWN \
BCG(arena) = NULL; \
BCG(arena_offset) = 0;
ZEND_DECLARE_MODULE_GLOBALS(bcmath)
static PHP_GINIT_FUNCTION(bcmath);
static PHP_GSHUTDOWN_FUNCTION(bcmath);
static PHP_MINIT_FUNCTION(bcmath);
static PHP_MSHUTDOWN_FUNCTION(bcmath);
static PHP_MINFO_FUNCTION(bcmath);
zend_module_entry bcmath_module_entry = {
STANDARD_MODULE_HEADER,
"bcmath",
ext_functions,
PHP_MINIT(bcmath),
PHP_MSHUTDOWN(bcmath),
NULL,
NULL,
PHP_MINFO(bcmath),
PHP_BCMATH_VERSION,
PHP_MODULE_GLOBALS(bcmath),
PHP_GINIT(bcmath),
PHP_GSHUTDOWN(bcmath),
NULL,
STANDARD_MODULE_PROPERTIES_EX
};
#ifdef COMPILE_DL_BCMATH
#ifdef ZTS
ZEND_TSRMLS_CACHE_DEFINE()
#endif
ZEND_GET_MODULE(bcmath)
#endif
ZEND_INI_MH(OnUpdateScale)
{
int *p;
zend_long tmp;
tmp = zend_ini_parse_quantity_warn(new_value, entry->name);
if (tmp < 0 || tmp > INT_MAX) {
return FAILURE;
}
p = (int *) ZEND_INI_GET_ADDR();
*p = (int) tmp;
return SUCCESS;
}
/* {{{ PHP_INI */
PHP_INI_BEGIN()
STD_PHP_INI_ENTRY("bcmath.scale", "0", PHP_INI_ALL, OnUpdateScale, bc_precision, zend_bcmath_globals, bcmath_globals)
PHP_INI_END()
/* }}} */
/* {{{ PHP_GINIT_FUNCTION */
static PHP_GINIT_FUNCTION(bcmath)
{
#if defined(COMPILE_DL_BCMATH) && defined(ZTS)
ZEND_TSRMLS_CACHE_UPDATE();
#endif
bcmath_globals->bc_precision = 0;
bcmath_globals->arena = NULL;
bcmath_globals->arena_offset = 0;
bc_init_numbers();
}
/* }}} */
/* {{{ PHP_GSHUTDOWN_FUNCTION */
static PHP_GSHUTDOWN_FUNCTION(bcmath)
{
bc_force_free_number(&bcmath_globals->_zero_);
bc_force_free_number(&bcmath_globals->_one_);
bc_force_free_number(&bcmath_globals->_two_);
bcmath_globals->arena = NULL;
bcmath_globals->arena_offset = 0;
}
/* }}} */
static void bcmath_number_register_class(void);
/* {{{ PHP_MINIT_FUNCTION */
PHP_MINIT_FUNCTION(bcmath)
{
REGISTER_INI_ENTRIES();
bcmath_number_register_class();
return SUCCESS;
}
/* }}} */
/* {{{ PHP_MSHUTDOWN_FUNCTION */
PHP_MSHUTDOWN_FUNCTION(bcmath)
{
UNREGISTER_INI_ENTRIES();
return SUCCESS;
}
/* }}} */
/* {{{ PHP_MINFO_FUNCTION */
PHP_MINFO_FUNCTION(bcmath)
{
php_info_print_table_start();
php_info_print_table_row(2, "BCMath support", "enabled");
php_info_print_table_end();
DISPLAY_INI_ENTRIES();
}
/* }}} */
static zend_always_inline zend_result bcmath_check_scale(zend_long scale, uint32_t arg_num)
{
if (UNEXPECTED(scale < 0 || scale > INT_MAX)) {
zend_argument_value_error(arg_num, "must be between 0 and %d", INT_MAX);
return FAILURE;
}
return SUCCESS;
}
static void php_long2num(bc_num *num, zend_long lval)
{
*num = bc_long2num(lval);
}
static zend_result php_str2num_ex(bc_num *num, const zend_string *str, size_t *full_scale)
{
if (!bc_str2num(num, ZSTR_VAL(str), ZSTR_VAL(str) + ZSTR_LEN(str), 0, full_scale, true)) {
return FAILURE;
}
return SUCCESS;
}
/* {{{ php_str2num
Convert to bc_num detecting scale */
static zend_result php_str2num(bc_num *num, const zend_string *str)
{
return php_str2num_ex(num, str, NULL);
}
/* }}} */
/* {{{ Returns the sum of two arbitrary precision numbers */
PHP_FUNCTION(bcadd)
{
zend_string *left, *right;
zend_long scale_param;
bool scale_param_is_null = 1;
bc_num first = NULL, second = NULL, result = NULL;
int scale;
ZEND_PARSE_PARAMETERS_START(2, 3)
Z_PARAM_STR(left)
Z_PARAM_STR(right)
Z_PARAM_OPTIONAL
Z_PARAM_LONG_OR_NULL(scale_param, scale_param_is_null)
ZEND_PARSE_PARAMETERS_END();
if (scale_param_is_null) {
scale = BCG(bc_precision);
} else if (bcmath_check_scale(scale_param, 3) == FAILURE) {
RETURN_THROWS();
} else {
scale = (int) scale_param;
}
BC_ARENA_SETUP;
if (php_str2num(&first, left) == FAILURE) {
zend_argument_value_error(1, "is not well-formed");
goto cleanup;
}
if (php_str2num(&second, right) == FAILURE) {
zend_argument_value_error(2, "is not well-formed");
goto cleanup;
}
result = bc_add (first, second, scale);
RETVAL_NEW_STR(bc_num2str_ex(result, scale));
cleanup: {
bc_free_num(&first);
bc_free_num(&second);
bc_free_num(&result);
BC_ARENA_TEARDOWN;
};
}
/* }}} */
/* {{{ Returns the difference between two arbitrary precision numbers */
PHP_FUNCTION(bcsub)
{
zend_string *left, *right;
zend_long scale_param;
bool scale_param_is_null = 1;
bc_num first = NULL, second = NULL, result = NULL;
int scale;
ZEND_PARSE_PARAMETERS_START(2, 3)
Z_PARAM_STR(left)
Z_PARAM_STR(right)
Z_PARAM_OPTIONAL
Z_PARAM_LONG_OR_NULL(scale_param, scale_param_is_null)
ZEND_PARSE_PARAMETERS_END();
if (scale_param_is_null) {
scale = BCG(bc_precision);
} else if (bcmath_check_scale(scale_param, 3) == FAILURE) {
RETURN_THROWS();
} else {
scale = (int) scale_param;
}
BC_ARENA_SETUP;
if (php_str2num(&first, left) == FAILURE) {
zend_argument_value_error(1, "is not well-formed");
goto cleanup;
}
if (php_str2num(&second, right) == FAILURE) {
zend_argument_value_error(2, "is not well-formed");
goto cleanup;
}
result = bc_sub (first, second, scale);
RETVAL_NEW_STR(bc_num2str_ex(result, scale));
cleanup: {
bc_free_num(&first);
bc_free_num(&second);
bc_free_num(&result);
BC_ARENA_TEARDOWN;
};
}
/* }}} */
/* {{{ Returns the multiplication of two arbitrary precision numbers */
PHP_FUNCTION(bcmul)
{
zend_string *left, *right;
zend_long scale_param;
bool scale_param_is_null = 1;
bc_num first = NULL, second = NULL, result = NULL;
int scale;
ZEND_PARSE_PARAMETERS_START(2, 3)
Z_PARAM_STR(left)
Z_PARAM_STR(right)
Z_PARAM_OPTIONAL
Z_PARAM_LONG_OR_NULL(scale_param, scale_param_is_null)
ZEND_PARSE_PARAMETERS_END();
if (scale_param_is_null) {
scale = BCG(bc_precision);
} else if (bcmath_check_scale(scale_param, 3) == FAILURE) {
RETURN_THROWS();
} else {
scale = (int) scale_param;
}
BC_ARENA_SETUP;
if (php_str2num(&first, left) == FAILURE) {
zend_argument_value_error(1, "is not well-formed");
goto cleanup;
}
if (php_str2num(&second, right) == FAILURE) {
zend_argument_value_error(2, "is not well-formed");
goto cleanup;
}
result = bc_multiply (first, second, scale);
RETVAL_NEW_STR(bc_num2str_ex(result, scale));
cleanup: {
bc_free_num(&first);
bc_free_num(&second);
bc_free_num(&result);
BC_ARENA_TEARDOWN;
};
}
/* }}} */
/* {{{ Returns the quotient of two arbitrary precision numbers (division) */
PHP_FUNCTION(bcdiv)
{
zend_string *left, *right;
zend_long scale_param;
bool scale_param_is_null = 1;
bc_num first = NULL, second = NULL, result;
int scale = BCG(bc_precision);
ZEND_PARSE_PARAMETERS_START(2, 3)
Z_PARAM_STR(left)
Z_PARAM_STR(right)
Z_PARAM_OPTIONAL
Z_PARAM_LONG_OR_NULL(scale_param, scale_param_is_null)
ZEND_PARSE_PARAMETERS_END();
if (scale_param_is_null) {
scale = BCG(bc_precision);
} else if (bcmath_check_scale(scale_param, 3) == FAILURE) {
RETURN_THROWS();
} else {
scale = (int) scale_param;
}
BC_ARENA_SETUP;
bc_init_num(&result);
if (php_str2num(&first, left) == FAILURE) {
zend_argument_value_error(1, "is not well-formed");
goto cleanup;
}
if (php_str2num(&second, right) == FAILURE) {
zend_argument_value_error(2, "is not well-formed");
goto cleanup;
}
if (!bc_divide(first, second, &result, scale)) {
zend_throw_exception_ex(zend_ce_division_by_zero_error, 0, "Division by zero");
goto cleanup;
}
RETVAL_NEW_STR(bc_num2str_ex(result, scale));
cleanup: {
bc_free_num(&first);
bc_free_num(&second);
bc_free_num(&result);
BC_ARENA_TEARDOWN;
};
}
/* }}} */
/* {{{ Returns the modulus of the two arbitrary precision operands */
PHP_FUNCTION(bcmod)
{
zend_string *left, *right;
zend_long scale_param;
bool scale_param_is_null = 1;
bc_num first = NULL, second = NULL, result;
int scale = BCG(bc_precision);
ZEND_PARSE_PARAMETERS_START(2, 3)
Z_PARAM_STR(left)
Z_PARAM_STR(right)
Z_PARAM_OPTIONAL
Z_PARAM_LONG_OR_NULL(scale_param, scale_param_is_null)
ZEND_PARSE_PARAMETERS_END();
if (scale_param_is_null) {
scale = BCG(bc_precision);
} else if (bcmath_check_scale(scale_param, 3) == FAILURE) {
RETURN_THROWS();
} else {
scale = (int) scale_param;
}
BC_ARENA_SETUP;
bc_init_num(&result);
if (php_str2num(&first, left) == FAILURE) {
zend_argument_value_error(1, "is not well-formed");
goto cleanup;
}
if (php_str2num(&second, right) == FAILURE) {
zend_argument_value_error(2, "is not well-formed");
goto cleanup;
}
if (!bc_modulo(first, second, &result, scale)) {
zend_throw_exception_ex(zend_ce_division_by_zero_error, 0, "Modulo by zero");
goto cleanup;
}
RETVAL_NEW_STR(bc_num2str_ex(result, scale));
cleanup: {
bc_free_num(&first);
bc_free_num(&second);
bc_free_num(&result);
BC_ARENA_TEARDOWN;
};
}
/* }}} */
PHP_FUNCTION(bcdivmod)
{
zend_string *left, *right;
zend_long scale_param;
bool scale_param_is_null = 1;
bc_num first = NULL, second = NULL, quot = NULL, rem = NULL;
int scale = BCG(bc_precision);
ZEND_PARSE_PARAMETERS_START(2, 3)
Z_PARAM_STR(left)
Z_PARAM_STR(right)
Z_PARAM_OPTIONAL
Z_PARAM_LONG_OR_NULL(scale_param, scale_param_is_null)
ZEND_PARSE_PARAMETERS_END();
if (scale_param_is_null) {
scale = BCG(bc_precision);
} else if (bcmath_check_scale(scale_param, 3) == FAILURE) {
RETURN_THROWS();
} else {
scale = (int) scale_param;
}
BC_ARENA_SETUP;
if (php_str2num(&first, left) == FAILURE) {
zend_argument_value_error(1, "is not well-formed");
goto cleanup;
}
if (php_str2num(&second, right) == FAILURE) {
zend_argument_value_error(2, "is not well-formed");
goto cleanup;
}
if (!bc_divmod(first, second, ", &rem, scale)) {
zend_throw_exception_ex(zend_ce_division_by_zero_error, 0, "Division by zero");
goto cleanup;
}
zval z_quot, z_rem;
ZVAL_STR(&z_quot, bc_num2str_ex(quot, 0));
ZVAL_STR(&z_rem, bc_num2str_ex(rem, scale));
RETVAL_ARR(zend_new_pair(&z_quot, &z_rem));
cleanup: {
bc_free_num(&first);
bc_free_num(&second);
bc_free_num(");
bc_free_num(&rem);
BC_ARENA_TEARDOWN;
};
}
/* {{{ Returns the value of an arbitrary precision number raised to the power of another reduced by a modulus */
PHP_FUNCTION(bcpowmod)
{
zend_string *base_str, *exponent_str, *modulus_str;
zend_long scale_param;
bool scale_param_is_null = 1;
bc_num bc_base = NULL, bc_expo = NULL, bc_modulus = NULL, result;
int scale = BCG(bc_precision);
ZEND_PARSE_PARAMETERS_START(3, 4)
Z_PARAM_STR(base_str)
Z_PARAM_STR(exponent_str)
Z_PARAM_STR(modulus_str)
Z_PARAM_OPTIONAL
Z_PARAM_LONG_OR_NULL(scale_param, scale_param_is_null)
ZEND_PARSE_PARAMETERS_END();
if (scale_param_is_null) {
scale = BCG(bc_precision);
} else if (bcmath_check_scale(scale_param, 4) == FAILURE) {
RETURN_THROWS();
} else {
scale = (int) scale_param;
}
BC_ARENA_SETUP;
bc_init_num(&result);
if (php_str2num(&bc_base, base_str) == FAILURE) {
zend_argument_value_error(1, "is not well-formed");
goto cleanup;
}
if (php_str2num(&bc_expo, exponent_str) == FAILURE) {
zend_argument_value_error(2, "is not well-formed");
goto cleanup;
}
if (php_str2num(&bc_modulus, modulus_str) == FAILURE) {
zend_argument_value_error(3, "is not well-formed");
goto cleanup;
}
raise_mod_status status = bc_raisemod(bc_base, bc_expo, bc_modulus, &result, scale);
switch (status) {
case BASE_HAS_FRACTIONAL:
zend_argument_value_error(1, "cannot have a fractional part");
goto cleanup;
case EXPO_HAS_FRACTIONAL:
zend_argument_value_error(2, "cannot have a fractional part");
goto cleanup;
case EXPO_IS_NEGATIVE:
zend_argument_value_error(2, "must be greater than or equal to 0");
goto cleanup;
case MOD_HAS_FRACTIONAL:
zend_argument_value_error(3, "cannot have a fractional part");
goto cleanup;
case MOD_IS_ZERO:
zend_throw_exception_ex(zend_ce_division_by_zero_error, 0, "Modulo by zero");
goto cleanup;
case OK:
RETVAL_NEW_STR(bc_num2str_ex(result, scale));
break;
EMPTY_SWITCH_DEFAULT_CASE();
}
cleanup: {
bc_free_num(&bc_base);
bc_free_num(&bc_expo);
bc_free_num(&bc_modulus);
bc_free_num(&result);
BC_ARENA_TEARDOWN;
};
}
/* }}} */
/* {{{ Returns the value of an arbitrary precision number raised to the power of another */
PHP_FUNCTION(bcpow)
{
zend_string *base_str, *exponent_str;
zend_long scale_param;
bool scale_param_is_null = 1;
bc_num first = NULL, bc_exponent = NULL, result;
int scale = BCG(bc_precision);
ZEND_PARSE_PARAMETERS_START(2, 3)
Z_PARAM_STR(base_str)
Z_PARAM_STR(exponent_str)
Z_PARAM_OPTIONAL
Z_PARAM_LONG_OR_NULL(scale_param, scale_param_is_null)
ZEND_PARSE_PARAMETERS_END();
if (scale_param_is_null) {
scale = BCG(bc_precision);
} else if (bcmath_check_scale(scale_param, 3) == FAILURE) {
RETURN_THROWS();
} else {
scale = (int) scale_param;
}
BC_ARENA_SETUP;
bc_init_num(&result);
if (php_str2num(&first, base_str) == FAILURE) {
zend_argument_value_error(1, "is not well-formed");
goto cleanup;
}
if (php_str2num(&bc_exponent, exponent_str) == FAILURE) {
zend_argument_value_error(2, "is not well-formed");
goto cleanup;
}
/* Check the exponent for scale digits and convert to a long. */
if (bc_exponent->n_scale != 0) {
zend_argument_value_error(2, "cannot have a fractional part");
goto cleanup;
}
long exponent = bc_num2long(bc_exponent);
if (exponent == 0 && (bc_exponent->n_len > 1 || bc_exponent->n_value[0] != 0)) {
zend_argument_value_error(2, "is too large");
goto cleanup;
}
if (!bc_raise(first, exponent, &result, scale)) {
zend_throw_exception_ex(zend_ce_division_by_zero_error, 0, "Negative power of zero");
goto cleanup;
}
RETVAL_NEW_STR(bc_num2str_ex(result, scale));
cleanup: {
bc_free_num(&first);
bc_free_num(&bc_exponent);
bc_free_num(&result);
BC_ARENA_TEARDOWN;
};
}
/* }}} */
/* {{{ Returns the square root of an arbitrary precision number */
PHP_FUNCTION(bcsqrt)
{
zend_string *left;
zend_long scale_param;
bool scale_param_is_null = 1;
bc_num result = NULL;
int scale = BCG(bc_precision);
ZEND_PARSE_PARAMETERS_START(1, 2)
Z_PARAM_STR(left)
Z_PARAM_OPTIONAL
Z_PARAM_LONG_OR_NULL(scale_param, scale_param_is_null)
ZEND_PARSE_PARAMETERS_END();
if (scale_param_is_null) {
scale = BCG(bc_precision);
} else if (bcmath_check_scale(scale_param, 2) == FAILURE) {
RETURN_THROWS();
} else {
scale = (int) scale_param;
}
BC_ARENA_SETUP;
if (php_str2num(&result, left) == FAILURE) {
zend_argument_value_error(1, "is not well-formed");
goto cleanup;
}
if (bc_sqrt (&result, scale) != 0) {
RETVAL_NEW_STR(bc_num2str_ex(result, scale));
} else {
zend_argument_value_error(1, "must be greater than or equal to 0");
}
cleanup: {
bc_free_num(&result);
BC_ARENA_TEARDOWN;
};
}
/* }}} */
/* {{{ Compares two arbitrary precision numbers */
PHP_FUNCTION(bccomp)
{
zend_string *left, *right;
zend_long scale_param;
bool scale_param_is_null = 1;
bc_num first = NULL, second = NULL;
int scale = BCG(bc_precision);
ZEND_PARSE_PARAMETERS_START(2, 3)
Z_PARAM_STR(left)
Z_PARAM_STR(right)
Z_PARAM_OPTIONAL
Z_PARAM_LONG_OR_NULL(scale_param, scale_param_is_null)
ZEND_PARSE_PARAMETERS_END();
if (scale_param_is_null) {
scale = BCG(bc_precision);
} else if (bcmath_check_scale(scale_param, 3) == FAILURE) {
RETURN_THROWS();
} else {
scale = (int) scale_param;
}
BC_ARENA_SETUP;
if (!bc_str2num(&first, ZSTR_VAL(left), ZSTR_VAL(left) + ZSTR_LEN(left), scale, NULL, false)) {
zend_argument_value_error(1, "is not well-formed");
goto cleanup;
}
if (!bc_str2num(&second, ZSTR_VAL(right), ZSTR_VAL(right) + ZSTR_LEN(right), scale, NULL, false)) {
zend_argument_value_error(2, "is not well-formed");
goto cleanup;
}
RETVAL_LONG(bc_compare(first, second, scale));
cleanup: {
bc_free_num(&first);
bc_free_num(&second);
BC_ARENA_TEARDOWN;
};
}
/* }}} */
/* {{{ floor or ceil */
static void bcfloor_or_bcceil(INTERNAL_FUNCTION_PARAMETERS, bool is_floor)
{
zend_string *numstr;
bc_num num = NULL, result = NULL;
ZEND_PARSE_PARAMETERS_START(1, 1)
Z_PARAM_STR(numstr)
ZEND_PARSE_PARAMETERS_END();
BC_ARENA_SETUP;
if (php_str2num(&num, numstr) == FAILURE) {
zend_argument_value_error(1, "is not well-formed");
goto cleanup;
}
result = bc_floor_or_ceil(num, is_floor);
RETVAL_NEW_STR(bc_num2str_ex(result, 0));
cleanup: {
bc_free_num(&num);
bc_free_num(&result);
BC_ARENA_TEARDOWN;
};
}
/* }}} */
/* {{{ Returns floor of num */
PHP_FUNCTION(bcfloor)
{
bcfloor_or_bcceil(INTERNAL_FUNCTION_PARAM_PASSTHRU, true);
}
/* }}} */
/* {{{ Returns ceil of num */
PHP_FUNCTION(bcceil)
{
bcfloor_or_bcceil(INTERNAL_FUNCTION_PARAM_PASSTHRU, false);
}
/* }}} */
/* {{{ Returns num rounded to the digits specified by precision. */
PHP_FUNCTION(bcround)
{
zend_string *numstr;
zend_long precision = 0;
zend_long mode = PHP_ROUND_HALF_UP;
zend_object *mode_object = NULL;
bc_num num = NULL, result;
ZEND_PARSE_PARAMETERS_START(1, 3)
Z_PARAM_STR(numstr)
Z_PARAM_OPTIONAL
Z_PARAM_LONG(precision)
Z_PARAM_OBJ_OF_CLASS(mode_object, rounding_mode_ce)
ZEND_PARSE_PARAMETERS_END();
if (mode_object != NULL) {
mode = php_math_round_mode_from_enum(mode_object);
}
switch (mode) {
case PHP_ROUND_HALF_UP:
case PHP_ROUND_HALF_DOWN:
case PHP_ROUND_HALF_EVEN:
case PHP_ROUND_HALF_ODD:
case PHP_ROUND_CEILING:
case PHP_ROUND_FLOOR:
case PHP_ROUND_TOWARD_ZERO:
case PHP_ROUND_AWAY_FROM_ZERO:
break;
default:
/* This is currently unreachable, but might become reachable when new modes are added. */
zend_argument_value_error(3, "is an unsupported rounding mode");
return;
}
BC_ARENA_SETUP;
bc_init_num(&result);
if (php_str2num(&num, numstr) == FAILURE) {
zend_argument_value_error(1, "is not well-formed");
goto cleanup;
}
size_t scale = bc_round(num, precision, mode, &result);
RETVAL_NEW_STR(bc_num2str_ex(result, scale));
cleanup: {
bc_free_num(&num);
bc_free_num(&result);
BC_ARENA_TEARDOWN;
};
}
/* }}} */
/* {{{ Sets default scale parameter for all bc math functions */
PHP_FUNCTION(bcscale)
{
zend_long old_scale, new_scale;
bool new_scale_is_null = 1;
ZEND_PARSE_PARAMETERS_START(0, 1)
Z_PARAM_OPTIONAL
Z_PARAM_LONG_OR_NULL(new_scale, new_scale_is_null)
ZEND_PARSE_PARAMETERS_END();
old_scale = BCG(bc_precision);
if (!new_scale_is_null) {
if (bcmath_check_scale(new_scale, 1) == FAILURE) {
RETURN_THROWS();
}
zend_string *ini_name = ZSTR_INIT_LITERAL("bcmath.scale", 0);
zend_string *new_scale_str = zend_long_to_str(new_scale);
zend_alter_ini_entry(ini_name, new_scale_str, PHP_INI_USER, PHP_INI_STAGE_RUNTIME);
zend_string_release(new_scale_str);
zend_string_release(ini_name);
}
RETURN_LONG(old_scale);
}
/* }}} */
static zend_class_entry *bcmath_number_ce;
static zend_object_handlers bcmath_number_obj_handlers;
static zend_result bcmath_number_do_operation(uint8_t opcode, zval *ret_val, zval *op1, zval *op2);
static int bcmath_number_compare(zval *op1, zval *op2);
#if SIZEOF_SIZE_T >= 8
# define CHECK_RET_SCALE_OVERFLOW(scale, origin_scale) (scale > INT_MAX)
#else
# define CHECK_RET_SCALE_OVERFLOW(scale, origin_scale) (scale > INT_MAX || scale < origin_scale)
#endif
#define CHECK_SCALE_OVERFLOW(scale) (scale > INT_MAX)
static zend_always_inline bcmath_number_obj_t *get_bcmath_number_from_obj(const zend_object *obj)
{
return (bcmath_number_obj_t*)((char*)(obj) - XtOffsetOf(bcmath_number_obj_t, std));
}
static zend_always_inline bcmath_number_obj_t *get_bcmath_number_from_zval(const zval *zv)
{
return get_bcmath_number_from_obj(Z_OBJ_P(zv));
}
static zend_always_inline zend_string *bcmath_number_value_to_str(bcmath_number_obj_t *intern)
{
if (intern->value == NULL) {
intern->value = bc_num2str_ex(intern->num, intern->scale);
}
return intern->value;
}
static zend_object *bcmath_number_create(zend_class_entry *ce)
{
bcmath_number_obj_t *intern = zend_object_alloc(sizeof(bcmath_number_obj_t), ce);
zend_object_std_init(&intern->std, ce);
object_properties_init(&intern->std, ce);
intern->scale = 1;
return &intern->std;
}
static void bcmath_number_free(zend_object *obj)
{
bcmath_number_obj_t *intern = get_bcmath_number_from_obj(obj);
if (intern->num) {
bc_free_num(&intern->num);
intern->num = NULL;
}
if (intern->value) {
zend_string_release(intern->value);
intern->value = NULL;
}
zend_object_std_dtor(&intern->std);
}
static zend_object *bcmath_number_clone(zend_object *obj)
{
bcmath_number_obj_t *original = get_bcmath_number_from_obj(obj);
bcmath_number_obj_t *clone = get_bcmath_number_from_obj(bcmath_number_create(bcmath_number_ce));
clone->num = bc_copy_num(original->num);
if (original->value) {
clone->value = zend_string_copy(original->value);
}
clone->scale = original->scale;
return &clone->std;
}
static HashTable *bcmath_number_get_properties_for(zend_object *obj, zend_prop_purpose purpose)
{
zval zv;
bcmath_number_obj_t *intern = get_bcmath_number_from_obj(obj);
HashTable *props = zend_array_dup(zend_std_get_properties(obj));
ZVAL_STR_COPY(&zv, bcmath_number_value_to_str(intern));
zend_hash_update(props, ZSTR_KNOWN(ZEND_STR_VALUE), &zv);
ZVAL_LONG(&zv, intern->scale);
zend_hash_str_update(props, ZEND_STRL("scale"), &zv);
return props;
}
static zval *bcmath_number_write_property(zend_object *obj, zend_string *name, zval *value, void **cache_slot)
{
if (zend_string_equals(name, ZSTR_KNOWN(ZEND_STR_VALUE)) || zend_string_equals_literal(name, "scale")) {
zend_readonly_property_modification_error_ex(ZSTR_VAL(obj->ce->name), ZSTR_VAL(name));
return &EG(error_zval);
}
return zend_std_write_property(obj, name, value, cache_slot);
}
static void bcmath_number_unset_property(zend_object *obj, zend_string *name, void **cache_slot)
{
if (zend_string_equals(name, ZSTR_KNOWN(ZEND_STR_VALUE)) || zend_string_equals_literal(name, "scale")) {
zend_throw_error(NULL, "Cannot unset readonly property %s::$%s", ZSTR_VAL(obj->ce->name), ZSTR_VAL(name));
return;
}
zend_std_unset_property(obj, name, cache_slot);
}
static zval *bcmath_number_read_property(zend_object *obj, zend_string *name, int type, void **cache_slot, zval *rv)
{
bcmath_number_obj_t *intern = get_bcmath_number_from_obj(obj);
if (zend_string_equals(name, ZSTR_KNOWN(ZEND_STR_VALUE))) {
ZVAL_STR_COPY(rv, bcmath_number_value_to_str(intern));
return rv;
}
if (zend_string_equals_literal(name, "scale")) {
ZVAL_LONG(rv, intern->scale);
return rv;
}
return zend_std_read_property(obj, name, type, cache_slot, rv);
}
static int bcmath_number_has_property(zend_object *obj, zend_string *name, int check_empty, void **cache_slot)
{
if (check_empty == ZEND_PROPERTY_NOT_EMPTY) {
bcmath_number_obj_t *intern = get_bcmath_number_from_obj(obj);
if (zend_string_equals(name, ZSTR_KNOWN(ZEND_STR_VALUE))) {
return !bc_is_zero(intern->num);
}
if (zend_string_equals_literal(name, "scale")) {
return intern->scale != 0;
}
}
return zend_string_equals(name, ZSTR_KNOWN(ZEND_STR_VALUE)) || zend_string_equals_literal(name, "scale");
}
static zend_result bcmath_number_cast_object(zend_object *obj, zval *ret, int type)
{
if (type == _IS_BOOL) {
bcmath_number_obj_t *intern = get_bcmath_number_from_obj(obj);
ZVAL_BOOL(ret, !bc_is_zero(intern->num));
return SUCCESS;
}
return zend_std_cast_object_tostring(obj, ret, type);
}