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gmp.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: Stanislav Malyshev <[email protected]> |
+----------------------------------------------------------------------+
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "php.h"
#include "php_ini.h"
#include "php_gmp.h"
#include "php_gmp_int.h"
#include "ext/standard/info.h"
#include "ext/standard/php_var.h"
#include "zend_smart_str_public.h"
#include "zend_exceptions.h"
#include <gmp.h>
/* Needed for gmp_random() */
#include "ext/random/php_random.h"
#include "ext/random/php_random_csprng.h"
#define GMP_ROUND_ZERO 0
#define GMP_ROUND_PLUSINF 1
#define GMP_ROUND_MINUSINF 2
#ifdef mpir_version
#define GMP_MPIR_VERSION_STRING ((char *) mpir_version)
#endif
#define GMP_VERSION_STRING ((char *) gmp_version)
#define GMP_MSW_FIRST (1 << 0)
#define GMP_LSW_FIRST (1 << 1)
#define GMP_LITTLE_ENDIAN (1 << 2)
#define GMP_BIG_ENDIAN (1 << 3)
#define GMP_NATIVE_ENDIAN (1 << 4)
#include "gmp_arginfo.h"
ZEND_DECLARE_MODULE_GLOBALS(gmp)
static ZEND_GINIT_FUNCTION(gmp);
/* {{{ gmp_module_entry */
zend_module_entry gmp_module_entry = {
STANDARD_MODULE_HEADER,
"gmp",
ext_functions,
ZEND_MODULE_STARTUP_N(gmp),
NULL,
NULL,
ZEND_MODULE_DEACTIVATE_N(gmp),
ZEND_MODULE_INFO_N(gmp),
PHP_GMP_VERSION,
ZEND_MODULE_GLOBALS(gmp),
ZEND_GINIT(gmp),
NULL,
NULL,
STANDARD_MODULE_PROPERTIES_EX
};
/* }}} */
#ifdef COMPILE_DL_GMP
#ifdef ZTS
ZEND_TSRMLS_CACHE_DEFINE()
#endif
ZEND_GET_MODULE(gmp)
#endif
static zend_class_entry *gmp_ce;
static zend_object_handlers gmp_object_handlers;
PHP_GMP_API zend_class_entry *php_gmp_class_entry(void) {
return gmp_ce;
}
typedef struct _gmp_temp {
mpz_t num;
bool is_used;
} gmp_temp_t;
#define GMP_MAX_BASE 62
#define GMP_51_OR_NEWER \
((__GNU_MP_VERSION >= 6) || (__GNU_MP_VERSION >= 5 && __GNU_MP_VERSION_MINOR >= 1))
#define IS_GMP(zval) \
(Z_TYPE_P(zval) == IS_OBJECT && instanceof_function(Z_OBJCE_P(zval), gmp_ce))
#define GET_GMP_OBJECT_FROM_OBJ(obj) \
php_gmp_object_from_zend_object(obj)
#define GET_GMP_OBJECT_FROM_ZVAL(zv) \
GET_GMP_OBJECT_FROM_OBJ(Z_OBJ_P(zv))
#define GET_GMP_FROM_ZVAL(zval) \
GET_GMP_OBJECT_FROM_OBJ(Z_OBJ_P(zval))->num
/* The FETCH_GMP_ZVAL_* family of macros is used to fetch a gmp number
* (mpz_ptr) from a zval. If the zval is not a GMP instance, then we
* try to convert the value to a temporary gmp number using convert_to_gmp.
* This temporary number is stored in the temp argument, which is of type
* gmp_temp_t. This temporary value needs to be freed lateron using the
* FREE_GMP_TEMP macro.
*
* If the conversion to a gmp number fails, the macros RETURN_THROWS() due to TypeError.
* The _DEP / _DEP_DEP variants additionally free the temporary values
* passed in the last / last two arguments.
*
* If one zval can sometimes be fetched as a long you have to set the
* is_used member of the corresponding gmp_temp_t value to 0, otherwise
* the FREE_GMP_TEMP and *_DEP macros will not work properly.
*
* The three FETCH_GMP_ZVAL_* macros below are mostly copy & paste code
* as I couldn't find a way to combine them.
*/
#define FREE_GMP_TEMP(temp) \
if (temp.is_used) { \
mpz_clear(temp.num); \
}
#define FETCH_GMP_ZVAL_DEP_DEP(gmpnumber, zval, temp, dep1, dep2, arg_pos) \
if (IS_GMP(zval)) { \
gmpnumber = GET_GMP_FROM_ZVAL(zval); \
temp.is_used = 0; \
} else { \
mpz_init(temp.num); \
if (convert_to_gmp(temp.num, zval, 0, arg_pos) == FAILURE) { \
mpz_clear(temp.num); \
FREE_GMP_TEMP(dep1); \
FREE_GMP_TEMP(dep2); \
RETURN_THROWS(); \
} \
temp.is_used = 1; \
gmpnumber = temp.num; \
}
#define FETCH_GMP_ZVAL_DEP(gmpnumber, zval, temp, dep, arg_pos) \
if (IS_GMP(zval)) { \
gmpnumber = GET_GMP_FROM_ZVAL(zval); \
temp.is_used = 0; \
} else { \
mpz_init(temp.num); \
if (convert_to_gmp(temp.num, zval, 0, arg_pos) == FAILURE) { \
mpz_clear(temp.num); \
FREE_GMP_TEMP(dep); \
RETURN_THROWS(); \
} \
temp.is_used = 1; \
gmpnumber = temp.num; \
}
#define FETCH_GMP_ZVAL(gmpnumber, zval, temp, arg_pos) \
if (IS_GMP(zval)) { \
gmpnumber = GET_GMP_FROM_ZVAL(zval); \
temp.is_used = 0; \
} else { \
mpz_init(temp.num); \
if (convert_to_gmp(temp.num, zval, 0, arg_pos) == FAILURE) { \
mpz_clear(temp.num); \
RETURN_THROWS(); \
} \
temp.is_used = 1; \
gmpnumber = temp.num; \
}
#define INIT_GMP_RETVAL(gmpnumber) \
gmp_create(return_value, &gmpnumber)
static void gmp_strval(zval *result, mpz_t gmpnum, int base);
static zend_result convert_to_gmp(mpz_t gmpnumber, zval *val, zend_long base, uint32_t arg_pos);
static void gmp_cmp(zval *return_value, zval *a_arg, zval *b_arg, bool is_operator);
/*
* The gmp_*_op functions provide an implementation for several common types
* of GMP functions. The gmp_zval_(unary|binary)_*_op functions have to be manually
* passed zvals to work on, whereas the gmp_(unary|binary)_*_op macros already
* include parameter parsing.
*/
typedef void (*gmp_unary_op_t)(mpz_ptr, mpz_srcptr);
typedef mp_bitcnt_t (*gmp_unary_opl_t)(mpz_srcptr);
typedef void (*gmp_unary_ui_op_t)(mpz_ptr, gmp_ulong);
typedef void (*gmp_binary_op_t)(mpz_ptr, mpz_srcptr, mpz_srcptr);
typedef void (*gmp_binary_ui_op_t)(mpz_ptr, mpz_srcptr, gmp_ulong);
typedef void (*gmp_binary_op2_t)(mpz_ptr, mpz_ptr, mpz_srcptr, mpz_srcptr);
typedef gmp_ulong (*gmp_binary_ui_op2_t)(mpz_ptr, mpz_ptr, mpz_srcptr, gmp_ulong);
static inline void gmp_zval_binary_ui_op(zval *return_value, zval *a_arg, zval *b_arg, gmp_binary_op_t gmp_op, gmp_binary_ui_op_t gmp_ui_op, bool check_b_zero, bool is_operator);
static inline void gmp_zval_binary_ui_op2(zval *return_value, zval *a_arg, zval *b_arg, gmp_binary_op2_t gmp_op, gmp_binary_ui_op2_t gmp_ui_op, int check_b_zero);
static inline void gmp_zval_unary_op(zval *return_value, zval *a_arg, gmp_unary_op_t gmp_op);
static void gmp_mpz_tdiv_q_ui(mpz_ptr a, mpz_srcptr b, gmp_ulong c) {
mpz_tdiv_q_ui(a, b, c);
}
static void gmp_mpz_tdiv_r_ui(mpz_ptr a, mpz_srcptr b, gmp_ulong c) {
mpz_tdiv_r_ui(a, b, c);
}
static void gmp_mpz_fdiv_q_ui(mpz_ptr a, mpz_srcptr b, gmp_ulong c) {
mpz_fdiv_q_ui(a, b, c);
}
static void gmp_mpz_fdiv_r_ui(mpz_ptr a, mpz_srcptr b, gmp_ulong c) {
mpz_fdiv_r_ui(a, b, c);
}
static void gmp_mpz_cdiv_r_ui(mpz_ptr a, mpz_srcptr b, gmp_ulong c) {
mpz_cdiv_r_ui(a, b, c);
}
static void gmp_mpz_cdiv_q_ui(mpz_ptr a, mpz_srcptr b, gmp_ulong c) {
mpz_cdiv_q_ui(a, b, c);
}
static void gmp_mpz_mod_ui(mpz_ptr a, mpz_srcptr b, gmp_ulong c) {
mpz_mod_ui(a, b, c);
}
static void gmp_mpz_gcd_ui(mpz_ptr a, mpz_srcptr b, gmp_ulong c) {
mpz_gcd_ui(a, b, c);
}
/* Binary operations */
#define gmp_binary_ui_op(op, uop) _gmp_binary_ui_op(INTERNAL_FUNCTION_PARAM_PASSTHRU, op, uop, 0)
#define gmp_binary_op(op) _gmp_binary_ui_op(INTERNAL_FUNCTION_PARAM_PASSTHRU, op, NULL, 0)
#define gmp_binary_ui_op_no_zero(op, uop) \
_gmp_binary_ui_op(INTERNAL_FUNCTION_PARAM_PASSTHRU, op, uop, 1)
/* Unary operations */
#define gmp_unary_op(op) _gmp_unary_op(INTERNAL_FUNCTION_PARAM_PASSTHRU, op)
#define gmp_unary_opl(op) _gmp_unary_opl(INTERNAL_FUNCTION_PARAM_PASSTHRU, op)
static void gmp_free_object_storage(zend_object *obj) /* {{{ */
{
gmp_object *intern = GET_GMP_OBJECT_FROM_OBJ(obj);
mpz_clear(intern->num);
zend_object_std_dtor(&intern->std);
}
/* }}} */
static inline zend_object *gmp_create_object_ex(zend_class_entry *ce, mpz_ptr *gmpnum_target) /* {{{ */
{
gmp_object *intern = emalloc(sizeof(gmp_object) + zend_object_properties_size(ce));
zend_object_std_init(&intern->std, ce);
object_properties_init(&intern->std, ce);
mpz_init(intern->num);
*gmpnum_target = intern->num;
return &intern->std;
}
/* }}} */
static zend_object *gmp_create_object(zend_class_entry *ce) /* {{{ */
{
mpz_ptr gmpnum_dummy;
return gmp_create_object_ex(ce, &gmpnum_dummy);
}
/* }}} */
static inline void gmp_create(zval *target, mpz_ptr *gmpnum_target) /* {{{ */
{
ZVAL_OBJ(target, gmp_create_object_ex(gmp_ce, gmpnum_target));
}
/* }}} */
static zend_result gmp_cast_object(zend_object *readobj, zval *writeobj, int type) /* {{{ */
{
mpz_ptr gmpnum;
switch (type) {
case IS_STRING:
gmpnum = GET_GMP_OBJECT_FROM_OBJ(readobj)->num;
gmp_strval(writeobj, gmpnum, 10);
return SUCCESS;
case IS_LONG:
gmpnum = GET_GMP_OBJECT_FROM_OBJ(readobj)->num;
ZVAL_LONG(writeobj, mpz_get_si(gmpnum));
return SUCCESS;
case IS_DOUBLE:
gmpnum = GET_GMP_OBJECT_FROM_OBJ(readobj)->num;
ZVAL_DOUBLE(writeobj, mpz_get_d(gmpnum));
return SUCCESS;
case _IS_NUMBER:
gmpnum = GET_GMP_OBJECT_FROM_OBJ(readobj)->num;
if (mpz_fits_slong_p(gmpnum)) {
ZVAL_LONG(writeobj, mpz_get_si(gmpnum));
} else {
ZVAL_DOUBLE(writeobj, mpz_get_d(gmpnum));
}
return SUCCESS;
default:
return FAILURE;
}
}
/* }}} */
static HashTable *gmp_get_debug_info(zend_object *obj, int *is_temp) /* {{{ */
{
HashTable *ht, *props = zend_std_get_properties(obj);
mpz_ptr gmpnum = GET_GMP_OBJECT_FROM_OBJ(obj)->num;
zval zv;
*is_temp = 1;
ht = zend_array_dup(props);
gmp_strval(&zv, gmpnum, 10);
zend_hash_str_update(ht, "num", sizeof("num")-1, &zv);
return ht;
}
/* }}} */
static zend_object *gmp_clone_obj(zend_object *obj) /* {{{ */
{
gmp_object *old_object = GET_GMP_OBJECT_FROM_OBJ(obj);
gmp_object *new_object = GET_GMP_OBJECT_FROM_OBJ(gmp_create_object(obj->ce));
zend_objects_clone_members( &new_object->std, &old_object->std);
mpz_set(new_object->num, old_object->num);
return &new_object->std;
}
/* }}} */
static void shift_operator_helper(gmp_binary_ui_op_t op, zval *return_value, zval *op1, zval *op2, uint8_t opcode) {
zend_long shift = zval_get_long(op2);
if (shift < 0) {
zend_throw_error(
zend_ce_value_error, "%s must be greater than or equal to 0",
opcode == ZEND_POW ? "Exponent" : "Shift"
);
ZVAL_UNDEF(return_value);
return;
} else {
mpz_ptr gmpnum_op, gmpnum_result;
gmp_temp_t temp;
FETCH_GMP_ZVAL(gmpnum_op, op1, temp, 1);
INIT_GMP_RETVAL(gmpnum_result);
op(gmpnum_result, gmpnum_op, (gmp_ulong) shift);
FREE_GMP_TEMP(temp);
}
}
#define DO_BINARY_UI_OP_EX(op, uop, check_b_zero) \
gmp_zval_binary_ui_op( \
result, op1, op2, op, uop, check_b_zero, /* is_operator */ true); \
if (UNEXPECTED(EG(exception))) { return FAILURE; } \
return SUCCESS;
#define DO_BINARY_UI_OP(op) DO_BINARY_UI_OP_EX(op, op ## _ui, 0)
#define DO_BINARY_OP(op) DO_BINARY_UI_OP_EX(op, NULL, 0)
#define DO_UNARY_OP(op) \
gmp_zval_unary_op(result, op1, op); \
if (UNEXPECTED(EG(exception))) { \
return FAILURE; \
} \
return SUCCESS;
static zend_result gmp_do_operation_ex(uint8_t opcode, zval *result, zval *op1, zval *op2) /* {{{ */
{
switch (opcode) {
case ZEND_ADD:
DO_BINARY_UI_OP(mpz_add);
case ZEND_SUB:
DO_BINARY_UI_OP(mpz_sub);
case ZEND_MUL:
DO_BINARY_UI_OP(mpz_mul);
case ZEND_POW:
shift_operator_helper(mpz_pow_ui, result, op1, op2, opcode);
return SUCCESS;
case ZEND_DIV:
DO_BINARY_UI_OP_EX(mpz_tdiv_q, gmp_mpz_tdiv_q_ui, 1);
case ZEND_MOD:
DO_BINARY_UI_OP_EX(mpz_mod, gmp_mpz_mod_ui, 1);
case ZEND_SL:
shift_operator_helper(mpz_mul_2exp, result, op1, op2, opcode);
return SUCCESS;
case ZEND_SR:
shift_operator_helper(mpz_fdiv_q_2exp, result, op1, op2, opcode);
return SUCCESS;
case ZEND_BW_OR:
DO_BINARY_OP(mpz_ior);
case ZEND_BW_AND:
DO_BINARY_OP(mpz_and);
case ZEND_BW_XOR:
DO_BINARY_OP(mpz_xor);
case ZEND_BW_NOT:
DO_UNARY_OP(mpz_com);
default:
return FAILURE;
}
}
/* }}} */
static zend_result gmp_do_operation(uint8_t opcode, zval *result, zval *op1, zval *op2) /* {{{ */
{
zval op1_copy;
int retval;
if (result == op1) {
ZVAL_COPY_VALUE(&op1_copy, op1);
op1 = &op1_copy;
}
retval = gmp_do_operation_ex(opcode, result, op1, op2);
if (retval == SUCCESS && op1 == &op1_copy) {
zval_ptr_dtor(op1);
}
return retval;
}
/* }}} */
static int gmp_compare(zval *op1, zval *op2) /* {{{ */
{
zval result;
gmp_cmp(&result, op1, op2, /* is_operator */ true);
/* An error/exception occurs if one of the operands is not a numeric string
* or an object which is different from GMP */
if (EG(exception)) {
return 1;
}
/* result can only be a zend_long if gmp_cmp hasn't thrown an Error */
ZEND_ASSERT(Z_TYPE(result) == IS_LONG);
return Z_LVAL(result);
}
/* }}} */
static int gmp_serialize(zval *object, unsigned char **buffer, size_t *buf_len, zend_serialize_data *data) /* {{{ */
{
mpz_ptr gmpnum = GET_GMP_FROM_ZVAL(object);
smart_str buf = {0};
zval zv;
php_serialize_data_t serialize_data;
PHP_VAR_SERIALIZE_INIT(serialize_data);
gmp_strval(&zv, gmpnum, 10);
php_var_serialize(&buf, &zv, &serialize_data);
zval_ptr_dtor_str(&zv);
ZVAL_ARR(&zv, zend_std_get_properties(Z_OBJ_P(object)));
php_var_serialize(&buf, &zv, &serialize_data);
PHP_VAR_SERIALIZE_DESTROY(serialize_data);
*buffer = (unsigned char *) estrndup(ZSTR_VAL(buf.s), ZSTR_LEN(buf.s));
*buf_len = ZSTR_LEN(buf.s);
zend_string_release_ex(buf.s, 0);
return SUCCESS;
}
/* }}} */
static int gmp_unserialize(zval *object, zend_class_entry *ce, const unsigned char *buf, size_t buf_len, zend_unserialize_data *data) /* {{{ */
{
mpz_ptr gmpnum;
const unsigned char *p, *max;
zval *zv;
int retval = FAILURE;
php_unserialize_data_t unserialize_data;
zend_object *zobj;
PHP_VAR_UNSERIALIZE_INIT(unserialize_data);
gmp_create(object, &gmpnum);
zobj = Z_OBJ_P(object);
p = buf;
max = buf + buf_len;
zv = var_tmp_var(&unserialize_data);
if (!php_var_unserialize(zv, &p, max, &unserialize_data)
|| Z_TYPE_P(zv) != IS_STRING
|| convert_to_gmp(gmpnum, zv, 10, 0) == FAILURE
) {
zend_throw_exception(NULL, "Could not unserialize number", 0);
goto exit;
}
zv = var_tmp_var(&unserialize_data);
if (!php_var_unserialize(zv, &p, max, &unserialize_data)
|| Z_TYPE_P(zv) != IS_ARRAY
) {
zend_throw_exception(NULL, "Could not unserialize properties", 0);
goto exit;
}
if (zend_hash_num_elements(Z_ARRVAL_P(zv)) != 0) {
zend_hash_copy(
zend_std_get_properties(zobj), Z_ARRVAL_P(zv),
(copy_ctor_func_t) zval_add_ref
);
}
retval = SUCCESS;
exit:
PHP_VAR_UNSERIALIZE_DESTROY(unserialize_data);
return retval;
}
/* }}} */
/* {{{ ZEND_GINIT_FUNCTION */
static ZEND_GINIT_FUNCTION(gmp)
{
#if defined(COMPILE_DL_GMP) && defined(ZTS)
ZEND_TSRMLS_CACHE_UPDATE();
#endif
gmp_globals->rand_initialized = 0;
}
/* }}} */
/* {{{ ZEND_MINIT_FUNCTION */
ZEND_MINIT_FUNCTION(gmp)
{
gmp_ce = register_class_GMP();
gmp_ce->create_object = gmp_create_object;
gmp_ce->default_object_handlers = &gmp_object_handlers;
gmp_ce->serialize = gmp_serialize;
gmp_ce->unserialize = gmp_unserialize;
memcpy(&gmp_object_handlers, &std_object_handlers, sizeof(zend_object_handlers));
gmp_object_handlers.offset = XtOffsetOf(gmp_object, std);
gmp_object_handlers.free_obj = gmp_free_object_storage;
gmp_object_handlers.cast_object = gmp_cast_object;
gmp_object_handlers.get_debug_info = gmp_get_debug_info;
gmp_object_handlers.clone_obj = gmp_clone_obj;
gmp_object_handlers.do_operation = gmp_do_operation;
gmp_object_handlers.compare = gmp_compare;
register_gmp_symbols(module_number);
return SUCCESS;
}
/* }}} */
/* {{{ ZEND_RSHUTDOWN_FUNCTION */
ZEND_MODULE_DEACTIVATE_D(gmp)
{
if (GMPG(rand_initialized)) {
gmp_randclear(GMPG(rand_state));
GMPG(rand_initialized) = 0;
}
return SUCCESS;
}
/* }}} */
/* {{{ ZEND_MINFO_FUNCTION */
ZEND_MODULE_INFO_D(gmp)
{
php_info_print_table_start();
php_info_print_table_row(2, "gmp support", "enabled");
#ifdef mpir_version
php_info_print_table_row(2, "MPIR version", mpir_version);
#else
php_info_print_table_row(2, "GMP version", gmp_version);
#endif
php_info_print_table_end();
}
/* }}} */
static zend_result convert_zstr_to_gmp(mpz_t gmp_number, const zend_string *val, zend_long base, uint32_t arg_pos)
{
const char *num_str = ZSTR_VAL(val);
bool skip_lead = false;
size_t num_len = ZSTR_LEN(val);
while (isspace(*num_str)) {
++num_str;
--num_len;
}
if (num_len >= 2 && num_str[0] == '0') {
if ((base == 0 || base == 16) && (num_str[1] == 'x' || num_str[1] == 'X')) {
base = 16;
skip_lead = true;
} else if ((base == 0 || base == 8) && (num_str[1] == 'o' || num_str[1] == 'O')) {
base = 8;
skip_lead = true;
} else if ((base == 0 || base == 2) && (num_str[1] == 'b' || num_str[1] == 'B')) {
base = 2;
skip_lead = true;
}
}
int gmp_ret = mpz_set_str(gmp_number, (skip_lead ? &num_str[2] : num_str), (int) base);
if (-1 == gmp_ret) {
if (arg_pos == 0) {
zend_value_error("Number is not an integer string");
} else {
zend_argument_value_error(arg_pos, "is not an integer string");
}
return FAILURE;
}
return SUCCESS;
}
/* {{{ convert_to_gmp
* Convert zval to be gmp number */
static zend_result convert_to_gmp(mpz_t gmpnumber, zval *val, zend_long base, uint32_t arg_pos)
{
switch (Z_TYPE_P(val)) {
case IS_LONG:
mpz_set_si(gmpnumber, Z_LVAL_P(val));
return SUCCESS;
case IS_STRING: {
return convert_zstr_to_gmp(gmpnumber, Z_STR_P(val), base, arg_pos);
}
default: {
zend_long lval;
if (!zend_parse_arg_long_slow(val, &lval, arg_pos)) {
if (arg_pos == 0) {
zend_type_error(
"Number must be of type GMP|string|int, %s given", zend_zval_value_name(val));
} else {
zend_argument_type_error(arg_pos,
"must be of type GMP|string|int, %s given", zend_zval_value_name(val));
}
return FAILURE;
}
mpz_set_si(gmpnumber, lval);
return SUCCESS;
}
}
}
/* }}} */
static void gmp_strval(zval *result, mpz_t gmpnum, int base) /* {{{ */
{
size_t num_len;
zend_string *str;
num_len = mpz_sizeinbase(gmpnum, abs(base));
if (mpz_sgn(gmpnum) < 0) {
num_len++;
}
str = zend_string_alloc(num_len, 0);
mpz_get_str(ZSTR_VAL(str), base, gmpnum);
/*
* From GMP documentation for mpz_sizeinbase():
* The returned value will be exact or 1 too big. If base is a power of
* 2, the returned value will always be exact.
*
* So let's check to see if we already have a \0 byte...
*/
if (ZSTR_VAL(str)[ZSTR_LEN(str) - 1] == '\0') {
ZSTR_LEN(str)--;
} else {
ZSTR_VAL(str)[ZSTR_LEN(str)] = '\0';
}
ZVAL_NEW_STR(result, str);
}
/* }}} */
static void gmp_cmp(zval *return_value, zval *a_arg, zval *b_arg, bool is_operator) /* {{{ */
{
mpz_ptr gmpnum_a, gmpnum_b;
gmp_temp_t temp_a, temp_b;
bool use_si = 0;
zend_long res;
FETCH_GMP_ZVAL(gmpnum_a, a_arg, temp_a, is_operator ? 0 : 1);
if (Z_TYPE_P(b_arg) == IS_LONG) {
use_si = 1;
temp_b.is_used = 0;
} else {
FETCH_GMP_ZVAL_DEP(gmpnum_b, b_arg, temp_b, temp_a, is_operator ? 0 : 2);
}
if (use_si) {
res = mpz_cmp_si(gmpnum_a, Z_LVAL_P(b_arg));
} else {
res = mpz_cmp(gmpnum_a, gmpnum_b);
}
FREE_GMP_TEMP(temp_a);
FREE_GMP_TEMP(temp_b);
RETURN_LONG(res);
}
/* }}} */
/* {{{ gmp_zval_binary_ui_op
Execute GMP binary operation.
*/
static inline void gmp_zval_binary_ui_op(zval *return_value, zval *a_arg, zval *b_arg, gmp_binary_op_t gmp_op, gmp_binary_ui_op_t gmp_ui_op, bool check_b_zero, bool is_operator)
{
mpz_ptr gmpnum_a, gmpnum_b, gmpnum_result;
gmp_temp_t temp_a, temp_b;
FETCH_GMP_ZVAL(gmpnum_a, a_arg, temp_a, is_operator ? 0 : 1);
if (gmp_ui_op && Z_TYPE_P(b_arg) == IS_LONG && Z_LVAL_P(b_arg) >= 0) {
gmpnum_b = NULL;
temp_b.is_used = 0;
} else {
FETCH_GMP_ZVAL_DEP(gmpnum_b, b_arg, temp_b, temp_a, is_operator ? 0 : 2);
}
if (check_b_zero) {
int b_is_zero = 0;
if (!gmpnum_b) {
b_is_zero = (Z_LVAL_P(b_arg) == 0);
} else {
b_is_zero = !mpz_cmp_ui(gmpnum_b, 0);
}
if (b_is_zero) {
if ((gmp_binary_op_t) mpz_mod == gmp_op) {
zend_throw_exception_ex(zend_ce_division_by_zero_error, 0, "Modulo by zero");
} else {
zend_throw_exception_ex(zend_ce_division_by_zero_error, 0, "Division by zero");
}
FREE_GMP_TEMP(temp_a);
FREE_GMP_TEMP(temp_b);
RETURN_THROWS();
}
}
INIT_GMP_RETVAL(gmpnum_result);
if (!gmpnum_b) {
gmp_ui_op(gmpnum_result, gmpnum_a, (gmp_ulong) Z_LVAL_P(b_arg));
} else {
gmp_op(gmpnum_result, gmpnum_a, gmpnum_b);
}
FREE_GMP_TEMP(temp_a);
FREE_GMP_TEMP(temp_b);
}
/* }}} */
/* {{{ gmp_zval_binary_ui_op2
Execute GMP binary operation which returns 2 values.
*/
static inline void gmp_zval_binary_ui_op2(zval *return_value, zval *a_arg, zval *b_arg, gmp_binary_op2_t gmp_op, gmp_binary_ui_op2_t gmp_ui_op, int check_b_zero)
{
mpz_ptr gmpnum_a, gmpnum_b, gmpnum_result1, gmpnum_result2;
gmp_temp_t temp_a, temp_b;
zval result1, result2;
FETCH_GMP_ZVAL(gmpnum_a, a_arg, temp_a, 1);
if (gmp_ui_op && Z_TYPE_P(b_arg) == IS_LONG && Z_LVAL_P(b_arg) >= 0) {
gmpnum_b = NULL;
temp_b.is_used = 0;
} else {
FETCH_GMP_ZVAL_DEP(gmpnum_b, b_arg, temp_b, temp_a, 2);
}
if (check_b_zero) {
int b_is_zero = 0;
if (!gmpnum_b) {
b_is_zero = (Z_LVAL_P(b_arg) == 0);
} else {
b_is_zero = !mpz_cmp_ui(gmpnum_b, 0);
}
if (b_is_zero) {
zend_throw_exception_ex(zend_ce_division_by_zero_error, 0, "Division by zero");
FREE_GMP_TEMP(temp_a);
FREE_GMP_TEMP(temp_b);
RETURN_THROWS();
}
}
gmp_create(&result1, &gmpnum_result1);
gmp_create(&result2, &gmpnum_result2);
array_init(return_value);
add_next_index_zval(return_value, &result1);
add_next_index_zval(return_value, &result2);
if (!gmpnum_b) {
gmp_ui_op(gmpnum_result1, gmpnum_result2, gmpnum_a, (gmp_ulong) Z_LVAL_P(b_arg));
} else {
gmp_op(gmpnum_result1, gmpnum_result2, gmpnum_a, gmpnum_b);
}
FREE_GMP_TEMP(temp_a);
FREE_GMP_TEMP(temp_b);
}
/* }}} */
/* {{{ _gmp_binary_ui_op */
static inline void _gmp_binary_ui_op(INTERNAL_FUNCTION_PARAMETERS, gmp_binary_op_t gmp_op, gmp_binary_ui_op_t gmp_ui_op, int check_b_zero)
{
zval *a_arg, *b_arg;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "zz", &a_arg, &b_arg) == FAILURE){
RETURN_THROWS();
}
gmp_zval_binary_ui_op(
return_value, a_arg, b_arg, gmp_op, gmp_ui_op, check_b_zero, /* is_operator */ false);
}
/* }}} */
/* Unary operations */
/* {{{ gmp_zval_unary_op */
static inline void gmp_zval_unary_op(zval *return_value, zval *a_arg, gmp_unary_op_t gmp_op)
{
mpz_ptr gmpnum_a, gmpnum_result;
gmp_temp_t temp_a;
FETCH_GMP_ZVAL(gmpnum_a, a_arg, temp_a, 1);
INIT_GMP_RETVAL(gmpnum_result);
gmp_op(gmpnum_result, gmpnum_a);
FREE_GMP_TEMP(temp_a);
}
/* }}} */
/* {{{ _gmp_unary_op */
static inline void _gmp_unary_op(INTERNAL_FUNCTION_PARAMETERS, gmp_unary_op_t gmp_op)
{
zval *a_arg;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "z", &a_arg) == FAILURE){
RETURN_THROWS();
}
gmp_zval_unary_op(return_value, a_arg, gmp_op);
}
/* }}} */
/* {{{ _gmp_unary_opl */
static inline void _gmp_unary_opl(INTERNAL_FUNCTION_PARAMETERS, gmp_unary_opl_t gmp_op)
{
zval *a_arg;
mpz_ptr gmpnum_a;
gmp_temp_t temp_a;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "z", &a_arg) == FAILURE){
RETURN_THROWS();
}
FETCH_GMP_ZVAL(gmpnum_a, a_arg, temp_a, 1);
RETVAL_LONG(gmp_op(gmpnum_a));
FREE_GMP_TEMP(temp_a);
}
/* }}} */
static bool gmp_verify_base(zend_long base, uint32_t arg_num)
{
if (base && (base < 2 || base > GMP_MAX_BASE)) {
zend_argument_value_error(arg_num, "must be 0 or between 2 and %d", GMP_MAX_BASE);
return false;
}
return true;
}
static zend_result gmp_initialize_number(mpz_ptr gmp_number, const zend_string *arg_str, zend_long arg_l, zend_long base)
{
if (arg_str) {
return convert_zstr_to_gmp(gmp_number, arg_str, base, 1);
}
mpz_set_si(gmp_number, arg_l);
return SUCCESS;
}
/* {{{ Initializes GMP number */
ZEND_FUNCTION(gmp_init)
{
mpz_ptr gmp_number;
zend_string *arg_str = NULL;
zend_long arg_l = 0;
zend_long base = 0;
ZEND_PARSE_PARAMETERS_START(1, 2)
Z_PARAM_STR_OR_LONG(arg_str, arg_l)
Z_PARAM_OPTIONAL
Z_PARAM_LONG(base)
ZEND_PARSE_PARAMETERS_END();
if (!gmp_verify_base(base, 2)) {
RETURN_THROWS();
}
INIT_GMP_RETVAL(gmp_number);
if (gmp_initialize_number(gmp_number, arg_str, arg_l, base) == FAILURE) {
RETURN_THROWS();
}
}
/* }}} */
int gmp_import_export_validate(zend_long size, zend_long options, int *order, int *endian)
{
if (size < 1) {
/* size argument is in second position */
zend_argument_value_error(2, "must be greater than or equal to 1");
return FAILURE;
}
switch (options & (GMP_LSW_FIRST | GMP_MSW_FIRST)) {
case GMP_LSW_FIRST:
*order = -1;
break;
case GMP_MSW_FIRST:
case 0: /* default */
*order = 1;
break;
default:
/* options argument is in second position */
zend_argument_value_error(3, "cannot use multiple word order options");
return FAILURE;
}
switch (options & (GMP_LITTLE_ENDIAN | GMP_BIG_ENDIAN | GMP_NATIVE_ENDIAN)) {
case GMP_LITTLE_ENDIAN:
*endian = -1;
break;
case GMP_BIG_ENDIAN:
*endian = 1;
break;
case GMP_NATIVE_ENDIAN:
case 0: /* default */
*endian = 0;
break;
default:
/* options argument is in second position */
zend_argument_value_error(3, "cannot use multiple endian options");
return FAILURE;
}
return SUCCESS;
}
/* {{{ Imports a GMP number from a binary string */
ZEND_FUNCTION(gmp_import)
{
char *data;
size_t data_len;
zend_long size = 1;
zend_long options = GMP_MSW_FIRST | GMP_NATIVE_ENDIAN;
int order, endian;
mpz_ptr gmpnumber;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "s|ll", &data, &data_len, &size, &options) == FAILURE) {
RETURN_THROWS();
}
if (gmp_import_export_validate(size, options, &order, &endian) == FAILURE) {
RETURN_THROWS();
}
if ((data_len % size) != 0) {
zend_argument_value_error(1, "must be a multiple of argument #2 ($word_size)");
RETURN_THROWS();
}
INIT_GMP_RETVAL(gmpnumber);
mpz_import(gmpnumber, data_len / size, order, size, endian, 0, data);
}
/* }}} */
/* {{{ Exports a GMP number to a binary string */
ZEND_FUNCTION(gmp_export)
{
zval *gmpnumber_arg;
zend_long size = 1;
zend_long options = GMP_MSW_FIRST | GMP_NATIVE_ENDIAN;
int order, endian;
mpz_ptr gmpnumber;
gmp_temp_t temp_a;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "z|ll", &gmpnumber_arg, &size, &options) == FAILURE) {
RETURN_THROWS();