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/*
* Copyright (c) 2008 Patrick McHardy <kaber@trash.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Development of this code funded by Astaro AG (http://www.astaro.com/)
*/
#include <nft.h>
#include <stddef.h>
#include <stdarg.h>
#include <stdio.h>
#include <unistd.h>
#include <nftables.h>
#include <datatype.h>
#include <utils.h>
void mpz_bitmask(mpz_t rop, unsigned int width)
{
mpz_set_ui(rop, 0);
mpz_setbit(rop, width);
mpz_sub_ui(rop, rop, 1);
}
void mpz_init_bitmask(mpz_t rop, unsigned int width)
{
mpz_init2(rop, width);
mpz_bitmask(rop, width);
}
void mpz_prefixmask(mpz_t rop, unsigned int width, unsigned int prefix_len)
{
mpz_bitmask(rop, prefix_len);
mpz_lshift_ui(rop, width - prefix_len);
}
void mpz_lshift_ui(mpz_t rop, unsigned int n)
{
mpz_mul_2exp(rop, rop, n);
}
void mpz_rshift_ui(mpz_t rop, unsigned int n)
{
mpz_tdiv_q_2exp(rop, rop, n);
}
#define mpz_get_type(type, endian, op) \
({ \
type ret = 0; \
size_t cnt; \
mpz_export(&ret, &cnt, MPZ_LSWF, sizeof(ret), endian, 0, op); \
assert(cnt <= 1); \
ret; \
})
uint64_t mpz_get_uint64(const mpz_t op)
{
return mpz_get_type(uint64_t, MPZ_HOST_ENDIAN, op);
}
uint32_t mpz_get_uint32(const mpz_t op)
{
return mpz_get_type(uint32_t, MPZ_HOST_ENDIAN, op);
}
uint16_t mpz_get_uint16(const mpz_t op)
{
return mpz_get_type(uint16_t, MPZ_HOST_ENDIAN, op);
}
uint8_t mpz_get_uint8(const mpz_t op)
{
return mpz_get_type(uint8_t, MPZ_HOST_ENDIAN, op);
}
uint32_t mpz_get_be32(const mpz_t op)
{
return mpz_get_type(uint32_t, MPZ_BIG_ENDIAN, op);
}
uint16_t mpz_get_be16(const mpz_t op)
{
return mpz_get_type(uint16_t, MPZ_BIG_ENDIAN, op);
}
void *__mpz_export_data(void *data, const mpz_t op, enum byteorder byteorder,
unsigned int len)
{
enum mpz_word_order order;
enum mpz_byte_order endian;
switch (byteorder) {
case BYTEORDER_BIG_ENDIAN:
default:
order = MPZ_MSWF;
endian = MPZ_BIG_ENDIAN;
break;
case BYTEORDER_HOST_ENDIAN:
order = MPZ_HWO;
endian = MPZ_HOST_ENDIAN;
break;
}
memset(data, 0, len);
mpz_export(data, NULL, order, len, endian, 0, op);
return data;
}
void __mpz_import_data(mpz_t rop, const void *data, enum byteorder byteorder,
unsigned int len)
{
enum mpz_word_order order;
enum mpz_byte_order endian;
switch (byteorder) {
case BYTEORDER_BIG_ENDIAN:
default:
order = MPZ_MSWF;
endian = MPZ_BIG_ENDIAN;
break;
case BYTEORDER_HOST_ENDIAN:
order = MPZ_HWO;
endian = MPZ_HOST_ENDIAN;
break;
}
mpz_import(rop, len, order, 1, endian, 0, data);
}
void __mpz_switch_byteorder(mpz_t rop, unsigned int len)
{
char data[len];
__mpz_export_data(data, rop, BYTEORDER_BIG_ENDIAN, len);
__mpz_import_data(rop, data, BYTEORDER_HOST_ENDIAN, len);
}
#ifndef HAVE_LIBGMP
/* mini-gmp doesn't have a gmp_printf so we use our own minimal
* variant here which is able to format a single mpz_t.
*/
int mpz_vfprintf(FILE *fp, const char *f, va_list args)
{
const mpz_t *value = va_arg(args, const mpz_t *);
int n = 0;
while (*f) {
if (*f != '%') {
if (fputc(*f, fp) != *f)
return -1;
++n;
} else {
unsigned long prec = 0;
int base;
size_t len;
char *str;
bool ok;
if (*++f == '.')
prec = strtoul(++f, (char**)&f, 10);
if (*f++ != 'Z')
return -1;
if (*f == 'u')
base = 10;
else if (*f == 'x')
base = 16;
else
return -1;
len = mpz_sizeinbase(*value, base);
while (prec-- > len) {
if (fputc('0', fp) != '0')
return -1;
++n;
}
str = mpz_get_str(NULL, base, *value);
ok = str && fwrite(str, 1, len, fp) == len;
free(str);
if (!ok)
return -1;
n += len;
}
++f;
}
return n;
}
#endif
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