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/* Test conversion using mpz_get_str and mpz_set_str.
Copyright 1993, 1994, 1996, 1999-2002, 2006, 2007, 2020 Free Software
Foundation, Inc.
This file is part of the GNU MP Library test suite.
The GNU MP Library test suite is free software; you can redistribute it
and/or modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 3 of the License,
or (at your option) any later version.
The GNU MP Library test suite 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. See the GNU General
Public License for more details.
You should have received a copy of the GNU General Public License along with
the GNU MP Library test suite. If not, see https://www.gnu.org/licenses/. */
#include <stdio.h>
#include <stdlib.h>
#include <string.h> /* for strlen */
#include <ctype.h> /* for tolower */
#include "gmp-impl.h"
#include "tests.h"
void debug_mp (mpz_t, int);
static int str_casecmp (const char *, const char *);
void
string_urandomb (char *bp, size_t len, int base, gmp_randstate_ptr rands)
{
mpz_t bs;
unsigned long bsi;
int d, l;
const char *collseq = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
mpz_init (bs);
mpz_urandomb (bs, rands, 32);
bsi = mpz_get_ui (bs);
d = bsi % base;
while (len != 0)
{
l = (bsi >> 16) % 20;
l = MIN (l, len);
memset (bp, collseq[d], l);
len -= l;
bp += l;
mpz_urandomb (bs, rands, 32);
bsi = mpz_get_ui (bs);
d = bsi & 0xfff;
if (d >= base)
d = 0;
}
bp[0] = '\0';
mpz_clear (bs);
}
int
main (int argc, char **argv)
{
mpz_t op1, op2;
mp_size_t size;
int i;
int reps = 2000;
char *str, *buf, *bp;
int base;
gmp_randstate_ptr rands;
mpz_t bs;
unsigned long bsi, size_range;
size_t len;
tests_start ();
TESTS_REPS (reps, argv, argc);
rands = RANDS;
mpz_init (bs);
mpz_init (op1);
mpz_init (op2);
for (i = 0; i < reps; i++)
{
/* 1. Generate random mpz_t and convert to a string and back to mpz_t
again. */
mpz_urandomb (bs, rands, 32);
size_range = mpz_get_ui (bs) % 17 + 2; /* 2..18 */
mpz_urandomb (bs, rands, size_range); /* 3..262144 bits */
size = mpz_get_ui (bs);
mpz_rrandomb (op1, rands, size);
mpz_urandomb (bs, rands, 1);
bsi = mpz_get_ui (bs);
if ((bsi & 1) != 0)
mpz_neg (op1, op1);
mpz_urandomb (bs, rands, 32);
bsi = mpz_get_ui (bs);
base = bsi % 62 + 1;
if (base == 1)
base = 0;
str = mpz_get_str ((char *) 0, base, op1);
mpz_set_str_or_abort (op2, str, base);
if (mpz_cmp (op1, op2))
{
fprintf (stderr, "ERROR, op1 and op2 different in test %d\n", i);
fprintf (stderr, "str = %s\n", str);
fprintf (stderr, "base = %d\n", base);
fprintf (stderr, "op1 = "); debug_mp (op1, -16);
fprintf (stderr, "op2 = "); debug_mp (op2, -16);
abort ();
}
(*__gmp_free_func) (str, strlen (str) + 1);
/* 2. Generate random string and convert to mpz_t and back to a string
again. */
mpz_urandomb (bs, rands, 32);
size_range = mpz_get_ui (bs) % 16 + 1; /* 1..16 */
mpz_urandomb (bs, rands, size_range); /* 1..65536 digits */
len = mpz_get_ui (bs) + 1;
buf = (char *) (*__gmp_allocate_func) (len + 1);
if (base == 0)
base = 10;
string_urandomb (buf, len, base, rands);
mpz_set_str_or_abort (op1, buf, base);
str = mpz_get_str ((char *) 0, base, op1);
/* Skip over leading zeros, but don't leave the string at zero length. */
for (bp = buf; bp[0] == '0' && bp[1] != '\0'; bp++)
;
if (str_casecmp (str, bp) != 0)
{
fprintf (stderr, "ERROR, str and buf different in test %d\n", i);
fprintf (stderr, "str = %s\n", str);
fprintf (stderr, "buf = %s\n", buf);
fprintf (stderr, "base = %d\n", base);
fprintf (stderr, "op1 = "); debug_mp (op1, -16);
abort ();
}
(*__gmp_free_func) (buf, len + 1);
(*__gmp_free_func) (str, strlen (str) + 1);
}
mpz_clear (bs);
mpz_clear (op1);
mpz_clear (op2);
tests_end ();
exit (0);
}
/* This is similar to POSIX strcasecmp except that we don't do the comparison
with unsigned char. We avoid strcasecmp for C standard conformance. */
static int
str_casecmp (const char *s1, const char *s2)
{
size_t i;
for (i = 0;; i++)
{
int c1 = s1[i];
int c2 = s2[i];
if (c1 == 0 || tolower (c1) != tolower (c2))
return c1 - c2;
}
}
void
debug_mp (mpz_t x, int base)
{
mpz_out_str (stderr, base, x); fputc ('\n', stderr);
}
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