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php_big_int.c
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php_big_int.c
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/***********************************************************************
Copyright 2004, 2005 Alexander Valyalkin
These sources is free software. You can redistribute it and/or
modify it freely. You can use it with any free or commercial
software.
These sources is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY. Without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
You may contact the author by:
e-mail: [email protected]
*************************************************************************/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "php.h"
#if HAVE_BIG_INT
#include "php_big_int.h"
#include "ext/standard/info.h" /* for phpinfo() functions */
#include "big_int_full.h"
#include <stdlib.h> /* for rand() */
#include <time.h> /* for time() */
typedef struct {
big_int *num;
char is_not_ref;
} args_entry;
typedef enum {LEFT, RIGHT} shift_direction;
typedef int (*tri_op_func) (const big_int *, const big_int *, const big_int *, big_int *);
typedef int (*tri_op1_func) (const big_int *, const big_int *, size_t, big_int *);
typedef int (*bin_op_func) (const big_int *, const big_int *, big_int *);
typedef int (*bin_op1_func) (const big_int *, size_t, big_int *);
typedef void (*bin_op2_func) (const big_int *, const big_int *, int *);
typedef int (*un_op_func) (const big_int *, big_int *);
typedef void (*un_op1_func) (const big_int *, unsigned int *);
typedef void (*un_op2_func) (const big_int *, int *);
/* compiled function list so Zend knows what's in this module */
zend_function_entry bi_functions[] =
{
ZEND_FE(bi_from_str, NULL)
ZEND_FE(bi_to_str, NULL)
ZEND_FE(bi_base_convert, NULL)
ZEND_FE(bi_add, NULL)
ZEND_FE(bi_sub, NULL)
ZEND_FE(bi_mul, NULL)
ZEND_FE(bi_div, NULL)
ZEND_FE(bi_mod, NULL)
ZEND_FE(bi_cmp, NULL)
ZEND_FE(bi_cmp_abs, NULL)
ZEND_FE(bi_or, NULL)
ZEND_FE(bi_xor, NULL)
ZEND_FE(bi_and, NULL)
ZEND_FE(bi_andnot, NULL)
ZEND_FE(bi_is_zero, NULL)
ZEND_FE(bi_is_one, NULL)
ZEND_FE(bi_abs, NULL)
ZEND_FE(bi_neg, NULL)
ZEND_FE(bi_inc, NULL)
ZEND_FE(bi_dec, NULL)
ZEND_FE(bi_sqr, NULL)
ZEND_FE(bi_sqrt, NULL)
ZEND_FE(bi_sqrt_rem, NULL)
ZEND_FE(bi_muladd, NULL)
ZEND_FE(bi_bit_len, NULL)
ZEND_FE(bi_bit1_cnt, NULL)
ZEND_FE(bi_addmod, NULL)
ZEND_FE(bi_submod, NULL)
ZEND_FE(bi_mulmod, NULL)
ZEND_FE(bi_divmod, NULL)
ZEND_FE(bi_powmod, NULL)
ZEND_FE(bi_factmod, NULL)
ZEND_FE(bi_absmod, NULL)
ZEND_FE(bi_invmod, NULL)
ZEND_FE(bi_sqrmod, NULL)
ZEND_FE(bi_gcd, NULL)
ZEND_FE(bi_next_prime, NULL)
ZEND_FE(bi_div_extended, NULL)
ZEND_FE(bi_sign, NULL)
ZEND_FE(bi_rand, NULL)
ZEND_FE(bi_lshift, NULL)
ZEND_FE(bi_rshift, NULL)
ZEND_FE(bi_set_bit, NULL)
ZEND_FE(bi_clr_bit, NULL)
ZEND_FE(bi_inv_bit, NULL)
ZEND_FE(bi_test_bit, NULL)
ZEND_FE(bi_scan0_bit, NULL)
ZEND_FE(bi_scan1_bit, NULL)
ZEND_FE(bi_hamming_distance, NULL)
ZEND_FE(bi_subint, NULL)
ZEND_FE(bi_cmpmod, NULL)
ZEND_FE(bi_miller_test, NULL)
ZEND_FE(bi_is_prime, NULL)
ZEND_FE(bi_jacobi, NULL)
ZEND_FE(bi_fact, NULL)
ZEND_FE(bi_pow, NULL)
ZEND_FE(bi_serialize, NULL)
ZEND_FE(bi_unserialize, NULL)
ZEND_FE(bi_gcd_extended, NULL)
ZEND_FE(bi_info, NULL)
{NULL, NULL, NULL}
};
/* compiled module information */
zend_module_entry bi_module_entry =
{
STANDARD_MODULE_HEADER,
BI_MODULE_NAME,
bi_functions,
ZEND_MINIT(bi),
ZEND_MSHUTDOWN(bi),
NULL,
NULL,
ZEND_MINFO(bi),
BI_VERSION,
STANDARD_MODULE_PROPERTIES
};
/* implement standard "stub" routine to introduce ourselves to Zend */
#if defined(COMPILE_DL_BIG_INT)
ZEND_GET_MODULE(bi)
#endif
/* resource type for [big_int] */
static int resource_type;
static int zval_to_big_int(const char *func_name, zval **tmp, args_entry *arg, int arg_pos TSRMLS_DC)
{
int rsrc_type, rsrc_id;
char errbuf[200];
big_int_str s;
if (Z_TYPE_PP(tmp) == IS_RESOURCE) {
arg->is_not_ref = 0; /* arg will not deleted in free_args() */
rsrc_id = Z_LVAL_PP(tmp);
arg->num = (big_int *) zend_list_find(rsrc_id, &rsrc_type);
if (arg->num == NULL) {
snprintf(errbuf, 200, BI_INTERNAL_ERROR);
goto error;
}
if (rsrc_type != resource_type) {
snprintf(errbuf, 200, "%s(): wrong resource type passed for argument number [%d] in function. Expected big_int",
func_name, arg_pos + 1);
goto error;
}
} else {
/* try to convert argument to [string] */
arg->is_not_ref = 1; /* this element will be deleted in free_args() */
arg->num = big_int_create(1);
if (arg->num == NULL) {
snprintf(errbuf, 200, BI_INTERNAL_ERROR);
goto error;
}
if (Z_TYPE_PP(tmp) != IS_STRING) {
SEPARATE_ZVAL(tmp);
convert_to_string(*tmp);
}
s.str = Z_STRVAL_PP(tmp);
s.len = Z_STRLEN_PP(tmp);
switch (big_int_from_str(&s, 10, arg->num)) {
case 0 : break; /* all ok */
case 2 :
snprintf(errbuf, 200, "%s(): argument number [%d] contains illegal chars. It can contain only decimal digits 0-9",
func_name, arg_pos + 1);
goto error;
case 3 :
snprintf(errbuf, 200, "%s(): argument number [%d] cannot be empty",
func_name, arg_pos + 1);
goto error;
default :
snprintf(errbuf, 200, "%s(): cannot convert argument number [%d] to big_int resource",
func_name, arg_pos + 1);
goto error;
}
}
return SUCCESS;
error:
zend_error(E_WARNING, errbuf);
return FAILURE;
}
static int get_func_args(const char *func_name, int args_cnt_min, int args_cnt_max,
int *args_cnt, args_entry *nums TSRMLS_DC)
{
zval **args[BI_MAX_FUNC_ARGS_CNT];
int i = 0;
char errbuf[200];
if (func_name == NULL) {
func_name = "unknown";
}
assert(args_cnt_min <= args_cnt_max);
assert(args_cnt_max <= BI_MAX_FUNC_ARGS_CNT);
*errbuf = '\0'; /* clear error buffer */
if (*args_cnt < args_cnt_min || *args_cnt > args_cnt_max) {
snprintf(errbuf, 200, "%s(): wrong numer of parameters. Function expected from %d to %d parameters",
func_name, args_cnt_min, args_cnt_max);
goto error;
}
/* read parameters of function */
if (zend_get_parameters_array_ex(*args_cnt, args) == FAILURE) {
snprintf(errbuf, 200, "%s(): wrong number of parameters", func_name);
goto error;
}
for (i = 0; i < *args_cnt; i++) {
if (zval_to_big_int(func_name, args[i], &nums[i], i TSRMLS_CC) == FAILURE) {
/* error message is already sent by zval_to_big_int() */
goto error;
}
}
return SUCCESS;
error:
*args_cnt = i;
if (*errbuf) {
zend_error(E_WARNING, errbuf);
}
return FAILURE;
}
static void free_args(args_entry *args, int cnt)
{
int i;
for (i = 0; i < cnt; i++) {
if (args[i].is_not_ref) {
big_int_destroy(args[i].num);
}
}
}
/**
Calculates big_int func_name(big_int a)
*/
static void un_op(const char *func_name, un_op_func func, int err_cnt,
char *const*err, INTERNAL_FUNCTION_PARAMETERS)
{
const char *errstr = NULL;
big_int *answer = NULL;
int args_cnt;
args_entry args[1] = {0};
int err_no;
args_cnt = ZEND_NUM_ARGS();
if (get_func_args(func_name, 1, 1, &args_cnt, args TSRMLS_CC) == FAILURE) {
goto error;
}
answer = big_int_create(1);
if (answer == NULL) {
errstr = BI_INTERNAL_ERROR;
goto error;
}
err_no = func(args[0].num, answer);
if (err_no) {
errstr = (err_no > err_cnt) ? BI_INTERNAL_ERROR : err[err_no - 1];
goto error;
}
free_args(args, 1);
/* register [answer] as resource */
ZEND_REGISTER_RESOURCE(return_value, answer, resource_type);
/* do not free [answer], because it is already registered as resource */
return;
error:
big_int_destroy(answer);
free_args(args, 1);
if (errstr != NULL) {
zend_error(E_WARNING, errstr);
}
RETVAL_NULL();
}
/**
Calculates int func_name(big_int a)
*/
static void un_op1(const char *func_name, un_op1_func func, INTERNAL_FUNCTION_PARAMETERS)
{
const char *errstr = NULL;
int args_cnt;
args_entry args[1] = {0};
unsigned int ans;
args_cnt = ZEND_NUM_ARGS();
if (get_func_args(func_name, 1, 1, &args_cnt, args TSRMLS_CC) == FAILURE) {
goto error;
}
func(args[0].num, &ans);
free_args(args, args_cnt);
RETVAL_LONG(ans);
return;
error:
free_args(args, args_cnt);
if (errstr != NULL) {
zend_error(E_WARNING, errstr);
}
RETVAL_NULL();
}
/**
Calculates bool func_name(big_int a)
(big_int_is_zero, big_int_is_one)
*/
static void un_op2(const char *func_name, un_op2_func func, INTERNAL_FUNCTION_PARAMETERS)
{
const char *errstr = NULL;
int args_cnt;
args_entry args[1] = {0};
int ans;
args_cnt = ZEND_NUM_ARGS();
if (get_func_args(func_name, 1, 1, &args_cnt, args TSRMLS_CC) == FAILURE) {
goto error;
}
func(args[0].num, &ans);
free_args(args, args_cnt);
RETVAL_LONG(ans);
return;
error:
free_args(args, args_cnt);
if (errstr != NULL) {
zend_error(E_WARNING, errstr);
}
RETVAL_NULL();
}
/**
Calculates big_int func_name(big_int a, big_int b)
*/
static void bin_op(const char *func_name, bin_op_func func, int err_cnt,
char *const*err, INTERNAL_FUNCTION_PARAMETERS)
{
const char *errstr = NULL;
big_int *answer = NULL;
int args_cnt;
args_entry args[2] = {0};
int err_no;
args_cnt = ZEND_NUM_ARGS();
if (get_func_args(func_name, 2, 2, &args_cnt, args TSRMLS_CC) == FAILURE) {
goto error;
}
answer = big_int_create(1);
if (answer == NULL) {
errstr = BI_INTERNAL_ERROR;
goto error;
}
err_no = func(args[0].num, args[1].num, answer);
if (err_no) {
errstr = (err_no > err_cnt) ? BI_INTERNAL_ERROR : err[err_no - 1];
goto error;
}
free_args(args, 2);
/* register [answer] as resource */
ZEND_REGISTER_RESOURCE(return_value, answer, resource_type);
/* do not free [answer], because it is already registered as resource */
return;
error:
big_int_destroy(answer);
free_args(args, 2);
if (errstr != NULL) {
zend_error(E_WARNING, errstr);
}
RETVAL_NULL();
}
/**
Calculates big_int func_name(big_int a, int c);
*/
static void bin_op1(const char *func_name, bin_op1_func func, INTERNAL_FUNCTION_PARAMETERS)
{
const char *errstr = NULL;
int n_bit;
big_int *answer = NULL;
zval *tmp;
args_entry arg = {0};
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "zl", &tmp, &n_bit) == FAILURE) {
/* error message was sent by zend_parse_parameters() */
goto error;
}
answer = big_int_create(1);
if (answer == NULL) {
errstr = BI_INTERNAL_ERROR;
goto error;
}
if (zval_to_big_int(func_name, &tmp, &arg, 0 TSRMLS_CC) == FAILURE) {
/* error message is already sent by zval_to_big_int() */
goto error;
}
if (n_bit >= 0) {
if (func(arg.num, (size_t) n_bit, answer)) {
errstr = BI_INTERNAL_ERROR;
goto error;
}
}
ZEND_REGISTER_RESOURCE(return_value, answer, resource_type);
free_args(&arg, 1);
/* do not free answer, because it is registered as resource */
return;
error:
big_int_destroy(answer);
free_args(&arg, 1);
if (errstr != NULL) {
zend_error(E_WARNING, errstr);
}
RETVAL_NULL();
}
/**
Calculates int func_name(big_int a, big_int b);
*/
static void bin_op2(const char *func_name, bin_op2_func func, INTERNAL_FUNCTION_PARAMETERS)
{
const char *errstr = NULL;
int args_cnt;
args_entry args[2] = {0};
int ans;
args_cnt = ZEND_NUM_ARGS();
if (get_func_args(func_name, 2, 2, &args_cnt, args TSRMLS_CC) == FAILURE) {
goto error;
}
func(args[0].num, args[1].num, &ans);
free_args(args, args_cnt);
RETVAL_LONG(ans);
return;
error:
free_args(args, args_cnt);
if (errstr != NULL) {
zend_error(E_WARNING, errstr);
}
RETVAL_NULL();
}
/**
Calculates big_int func_name(big_int a, big_int b, big_int c)
*/
static void tri_op(const char *func_name, tri_op_func func, int err_cnt,
char *const*err, INTERNAL_FUNCTION_PARAMETERS)
{
const char *errstr = NULL;
big_int *answer = NULL;
int args_cnt;
args_entry args[3] = {0};
int err_no;
args_cnt = ZEND_NUM_ARGS();
if (get_func_args(func_name, 3, 3, &args_cnt, args TSRMLS_CC) == FAILURE) {
goto error;
}
answer = big_int_create(1);
if (answer == NULL) {
errstr = BI_INTERNAL_ERROR;
goto error;
}
err_no = func(args[0].num, args[1].num, args[2].num, answer);
if (err_no) {
errstr = (err_no > err_cnt) ? BI_INTERNAL_ERROR : err[err_no - 1];
goto error;
}
free_args(args, 3);
/* register [answer] as resource */
ZEND_REGISTER_RESOURCE(return_value, answer, resource_type);
/* do not free [answer], because it is already registered as resource */
return;
error:
big_int_destroy(answer);
free_args(args, 3);
if (errstr != NULL) {
zend_error(E_WARNING, errstr);
}
RETVAL_NULL();
}
/**
Calculates big_int func_name(big_int a, big_int b [, int c]);
(big_int_or, big_int_xor, big_int_and, big_int_andnot)
*/
static void tri_op1(const char *func_name, tri_op1_func func, INTERNAL_FUNCTION_PARAMETERS)
{
const char *errstr = NULL;
int start_pos = 0;
big_int *answer = NULL;
zval *tmp[2];
args_entry args[2] = {0};
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "zz|l", &tmp[0], &tmp[1], &start_pos) == FAILURE) {
/* error message was sent by zend_parse_parameters() */
goto error;
}
if (start_pos < 0) {
start_pos = 0;
}
answer = big_int_create(1);
if (answer == NULL) {
errstr = BI_INTERNAL_ERROR;
goto error;
}
if (zval_to_big_int(func_name, &tmp[0], &args[0], 0 TSRMLS_CC) == FAILURE) {
/* error message is already sent by zval_to_big_int() */
goto error;
}
if (zval_to_big_int(func_name, &tmp[1], &args[1], 1 TSRMLS_CC) == FAILURE) {
/* error message is already sent by zval_to_big_int() */
goto error;
}
if (func(args[0].num, args[1].num, (size_t) start_pos, answer)) {
errstr = BI_INTERNAL_ERROR;
goto error;
}
ZEND_REGISTER_RESOURCE(return_value, answer, resource_type);
free_args(args, 2);
/* do not free answer, because it is registered as resource */
return;
error:
big_int_destroy(answer);
free_args(args, 2);
if (errstr != NULL) {
zend_error(E_WARNING, errstr);
}
RETVAL_NULL();
}
static void do_shift(const char *func_name, shift_direction dir, INTERNAL_FUNCTION_PARAMETERS)
{
bin_op1_func func;
const char *errstr = NULL;
int n_bit;
big_int *answer = NULL;
zval *tmp;
args_entry arg = {0};
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "zl", &tmp, &n_bit) == FAILURE) {
/* error message was sent by zend_parse_parameters() */
goto error;
}
answer = big_int_create(1);
if (answer == NULL) {
errstr = BI_INTERNAL_ERROR;
goto error;
}
if (zval_to_big_int(func_name, &tmp, &arg, 0 TSRMLS_CC) == FAILURE) {
/* error message is already sent by zval_to_big_int() */
goto error;
}
switch (dir) {
case RIGHT:
func = big_int_rshift;
break;
case LEFT:
func = big_int_lshift;
break;
default:
errstr = BI_INTERNAL_ERROR;
goto error;
}
if (func(arg.num, n_bit, answer)) {
errstr = BI_INTERNAL_ERROR;
goto error;
}
ZEND_REGISTER_RESOURCE(return_value, answer, resource_type);
free_args(&arg, 1);
/* do not free answer, because it is registered as resource */
return;
error:
big_int_destroy(answer);
free_args(&arg, 1);
if (errstr != NULL) {
zend_error(E_WARNING, errstr);
}
RETVAL_NULL();
}
/*******************************************************************/
static void bi_destruction_handler(zend_rsrc_list_entry *rsrc TSRMLS_DC)
{
/* free allocated memory */
big_int_destroy((big_int *) rsrc->ptr);
}
ZEND_MINIT_FUNCTION(bi)
{
time_t t;
/* register big_int resource type */
resource_type = zend_register_list_destructors_ex(bi_destruction_handler, NULL, BI_RESOURCE_NAME, module_number);
/* seed pseudorandom generator */
t = time(NULL);
srand((unsigned) t);
return SUCCESS;
}
ZEND_MSHUTDOWN_FUNCTION(bi)
{
return SUCCESS;
}
ZEND_MINFO_FUNCTION(bi)
{
php_info_print_table_start();
php_info_print_table_row(2, "big_int support", "enabled");
php_info_print_table_row(2, "big_int library version", BIG_INT_VERSION);
php_info_print_table_row(2, "php module version", BI_VERSION);
php_info_print_table_end();
}
/*******************************************************************/
/**
resource bi_from_str(string number [, int base])
Creates big_int number from string [number].
[base] - is base of number. It can be from 2 to 36 inclusive
Default value of [base] is 10.
*/
ZEND_FUNCTION(bi_from_str)
{
char *str = NULL;
int str_len;
int base;
big_int_str s;
big_int *num = NULL;
const char *errstr = NULL;
/* read parameters of function */
base = 10;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|l",
&str, &str_len, &base) == FAILURE) {
/* error message was sent by zend_parse_parameters() */
goto error;
}
/* initialize [num] */
num = big_int_create(1);
if (num == NULL) {
errstr = BI_INTERNAL_ERROR;
goto error;
}
/* convert string to big_int */
s.str = str;
s.len = str_len;
switch (big_int_from_str(&s, base, num)) {
case 0: break; /* no errors */
case 1: /* wrong base */
errstr = "bi_from_str(): wrong [base]. It can be from 2 to 36 inclusive";
goto error;
case 2: /* string contains wrong chars for chosen base */
errstr = "bi_from_str(): string contains wrong chars for chosen base";
goto error;
case 3:
errstr = "bi_from_str(): length of the string must be greater than 0";
goto error;
default:
errstr = BI_INTERNAL_ERROR;
goto error;
}
/* register [num] as resource */
ZEND_REGISTER_RESOURCE(return_value, num, resource_type);
/* do not free [num], because it is already registered as resource */
return;
error:
/* free allocated memory and print error */
big_int_destroy(num);
if (errstr != NULL) {
zend_error(E_WARNING, errstr);
}
RETVAL_NULL();
}
/**
str bi_to_str(resource number [, int base])
Converts [num] to string with base [base].
[base] - is base of number. It can be from 2 to 36 inclusive
Default value of [base] is 10.
*/
ZEND_FUNCTION(bi_to_str)
{
zval *tmp = NULL;
int base;
big_int_str *s_ptr = NULL;
const char *errstr = NULL;
args_entry arg = {0};
/* read parameters of function */
base = 10;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z|l",
&tmp, &base) == FAILURE) {
/* error message was sent by zend_parse_parameters() */
goto error;
}
/* initialize [s_ptr] */
s_ptr = big_int_str_create(1);
if (s_ptr == NULL) {
errstr = BI_INTERNAL_ERROR;
goto error;
}
if (zval_to_big_int("bi_to_str", &tmp, &arg, 0 TSRMLS_CC) == FAILURE) {
/* error message is already sent by zval_to_big_int() */
goto error;
}
switch (big_int_to_str(arg.num, base, s_ptr)) {
case 0: break; /* no errors */
case 1: /* wrong base */
errstr = "bi_to_str(): wrong [base]. It can be from 2 to 36 inclusive";
goto error;
default:
errstr = BI_INTERNAL_ERROR;
goto error;
}
RETVAL_STRINGL(s_ptr->str, (int) s_ptr->len, 1);
/* free allocated memory */
free_args(&arg, 1);
big_int_str_destroy(s_ptr);
return;
error:
/* free allocated memory and print error */
free_args(&arg, 1);
big_int_str_destroy(s_ptr);
if (errstr != NULL) {
zend_error(E_WARNING, errstr);
}
RETVAL_NULL();
}
/**
string bi_base_convert(string number, int base_from, int base_to)
Returns a string containing number represented in base [base_to].
[base_from] - is base of [number].
[base_from] and [base_to] can be from 2 to 36 inclusive.
*/
ZEND_FUNCTION(bi_base_convert)
{
char *str = NULL;
int str_len;
int base_from, base_to;
big_int_str s, *s_ptr = NULL;
const char *errstr = NULL;
/* read parameters of function */
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "sll",
&str, &str_len, &base_from, &base_to) == FAILURE) {
/* error message was sent by zend_parse_parameters() */
goto error;
}
/* initialize [s_ptr] */
s_ptr = big_int_str_create(1);
if (s_ptr == NULL) {
errstr = BI_INTERNAL_ERROR;
goto error;
}
/* call big_int_base_convert() */
s.str = str;
s.len = str_len;
switch (big_int_base_convert(&s, s_ptr, base_from, base_to)) {
case 0: break; /* no errors */
case 1: /* wrong base_from */
errstr = "bi_base_convert(): wrong [base_from]. It can be from 2 to 36 inclusive";
goto error;
case 2: /* wrong base_to */
errstr = "bi_base_convert(): wrong [base_to]. It can be from 2 to 36 inclusive";
goto error;
case 3: /* string contains wrong chars for chosen base */
errstr = "bi_base_convert(): string contains wrong chars for [base_from]";
goto error;
case 4:
errstr = "bi_base_convert(): length of the string must be greater than 0";
goto error;
default:
errstr = BI_INTERNAL_ERROR;
goto error;
}
/* do not free [num], because it is already registered as resource */
RETVAL_STRINGL(s_ptr->str, (int) s_ptr->len, 1);
/* free allocated memory */
big_int_str_destroy(s_ptr);
return;
error:
/* free allocated memory and print error */
big_int_str_destroy(s_ptr);
if (errstr != NULL) {
zend_error(E_WARNING, errstr);
}
RETVAL_NULL();
}
/**
resource bi_add(resource a, resource b)
Calculates a + b.
*/
ZEND_FUNCTION(bi_add)
{
bin_op("bi_add", big_int_add, 0, NULL, INTERNAL_FUNCTION_PARAM_PASSTHRU);
}
/**
resource bi_sub(resource a, resource b)
Calculates a - b.
*/
ZEND_FUNCTION(bi_sub)
{
bin_op("bi_sub", big_int_sub, 0, NULL, INTERNAL_FUNCTION_PARAM_PASSTHRU);
}
/**
resource bi_mul(resource a, resource b)
Calculates a * b.
*/
ZEND_FUNCTION(bi_mul)
{
bin_op("bi_mul", big_int_mul, 0, NULL, INTERNAL_FUNCTION_PARAM_PASSTHRU);
}
/**
resource bi_div(resource a, resource b)
Calculates a / b.
*/
ZEND_FUNCTION(bi_div)
{
char *err[] = {
"bi_div(): division by zero",
};
bin_op("bi_div", big_int_div, 1, err, INTERNAL_FUNCTION_PARAM_PASSTHRU);
}
/**
resource bi_mod(resource a, resource b)
Calculates a % b.
*/
ZEND_FUNCTION(bi_mod)
{
char *err[] = {
"bi_mod(): division by zero",
};
bin_op("bi_mod", big_int_mod, 1, err, INTERNAL_FUNCTION_PARAM_PASSTHRU);
}
/**
resource bi_or(resource a, resource b [, int start_pos])
Calculates a or b, starting with start_pos.
*/
ZEND_FUNCTION(bi_or)
{
tri_op1("bi_or", big_int_or, INTERNAL_FUNCTION_PARAM_PASSTHRU);
}
/**
resource bi_and(resource a, resource b [, int start_pos])
Calculates a and b, starting with start_pos.
*/
ZEND_FUNCTION(bi_and)
{
tri_op1("bi_and", big_int_and, INTERNAL_FUNCTION_PARAM_PASSTHRU);
}
/**
resource bi_xor(resource a, resource b [, int start_pos])
Calculates a xor b, starting with start_pos.
*/
ZEND_FUNCTION(bi_xor)
{
tri_op1("bi_xor", big_int_xor, INTERNAL_FUNCTION_PARAM_PASSTHRU);
}
/**
resource bi_andnot(resource a, resource b [, int start_pos])
Calculates a andnot b, starting with start_pos.
*/
ZEND_FUNCTION(bi_andnot)
{
tri_op1("bi_andnot", big_int_andnot, INTERNAL_FUNCTION_PARAM_PASSTHRU);
}
/**
resource bi_abs(resource a)
Calculates abs(a).
*/
ZEND_FUNCTION(bi_abs)
{
un_op("bi_abs", big_int_abs, 0, NULL, INTERNAL_FUNCTION_PARAM_PASSTHRU);
}
/**
resource bi_neg(resource a)
Calculates neg(a).
*/
ZEND_FUNCTION(bi_neg)
{
un_op("bi_neg", big_int_neg, 0, NULL, INTERNAL_FUNCTION_PARAM_PASSTHRU);
}
/**
resource bi_inc(resource a)
Calculates inc(a).
*/
ZEND_FUNCTION(bi_inc)
{
un_op("bi_inc", big_int_inc, 0, NULL, INTERNAL_FUNCTION_PARAM_PASSTHRU);
}
/**
resource bi_dec(resource a)
Calculates dec(a).
*/
ZEND_FUNCTION(bi_dec)
{
un_op("bi_dec", big_int_dec, 0, NULL, INTERNAL_FUNCTION_PARAM_PASSTHRU);
}
/**
resource bi_sqr(resource a)