t-get_si.c
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上传日期:2022-08-06
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- /* Exercise mpz_get_si.
- Copyright 2000, 2001 Free Software Foundation, Inc.
- This file is part of the GNU MP Library.
- The GNU MP Library is free software; you can redistribute it and/or modify
- it under the terms of the GNU Lesser 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 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 Lesser General Public
- License for more details.
- You should have received a copy of the GNU Lesser General Public License
- along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */
- #include <stdio.h>
- #include <stdlib.h>
- #include "gmp.h"
- #include "gmp-impl.h"
- #include "tests.h"
- void
- check_data (void)
- {
- static const struct {
- int base;
- const char *f;
- long want;
- } data[] = {
- { 10, "0", 0L },
- { 10, "1", 1L },
- { 10, "-1", -1L },
- { 10, "2", 2L },
- { 10, "-2", -2L },
- { 10, "12345", 12345L },
- { 10, "-12345", -12345L },
- /* fraction bits ignored */
- { 10, "0.5", 0L },
- { 10, "-0.5", 0L },
- { 10, "1.1", 1L },
- { 10, "-1.1", -1L },
- { 10, "1.9", 1L },
- { 10, "-1.9", -1L },
- { 16, "1.000000000000000000000000000000000000000000000000001", 1L },
- { 16, "-1.000000000000000000000000000000000000000000000000001", -1L },
- /* low bits extracted (this is undocumented) */
- { 16, "1000000000000000000000000000000000000000000000000001", 1L },
- { 16, "-1000000000000000000000000000000000000000000000000001", -1L },
- };
- int i;
- mpf_t f;
- long got;
- mpf_init2 (f, 2000L);
- for (i = 0; i < numberof (data); i++)
- {
- mpf_set_str_or_abort (f, data[i].f, data[i].base);
- got = mpf_get_si (f);
- if (got != data[i].want)
- {
- printf ("mpf_get_si wrong at data[%d]n", i);
- printf (" f "%s"n", data[i].f);
- printf (" dec "); mpf_out_str (stdout, 10, 0, f); printf ("n");
- printf (" hex "); mpf_out_str (stdout, 16, 0, f); printf ("n");
- printf (" size %ldn", (long) SIZ(f));
- printf (" exp %ldn", (long) EXP(f));
- printf (" got %ld (0x%lX)n", got, got);
- printf (" want %ld (0x%lX)n", data[i].want, data[i].want);
- abort();
- }
- }
- mpf_clear (f);
- }
- void
- check_max (void)
- {
- mpf_t f;
- long want;
- long got;
- mpf_init2 (f, 200L);
- #define CHECK_MAX(name)
- if (got != want)
- {
- printf ("mpf_get_si wrong on %sn", name);
- printf (" f ");
- mpf_out_str (stdout, 10, 0, f); printf (", hex ");
- mpf_out_str (stdout, 16, 0, f); printf ("n");
- printf (" got %ld, hex %lXn", got, got);
- printf (" want %ld, hex %lXn", want, want);
- abort();
- }
- want = LONG_MAX;
- mpf_set_si (f, want);
- got = mpf_get_si (f);
- CHECK_MAX ("LONG_MAX");
- want = LONG_MIN;
- mpf_set_si (f, want);
- got = mpf_get_si (f);
- CHECK_MAX ("LONG_MIN");
- mpf_clear (f);
- }
- void
- check_limbdata (void)
- {
- #define M GMP_NUMB_MAX
- static const struct {
- mp_exp_t exp;
- mp_size_t size;
- mp_limb_t d[10];
- unsigned long want;
- } data[] = {
- /* in the comments here, a "_" indicates a digit (ie. limb) position not
- included in the d data, and therefore zero */
- { 0, 0, { 0 }, 0L }, /* 0 */
- { 1, 1, { 1 }, 1L }, /* 1 */
- { 1, -1, { 1 }, -1L }, /* -1 */
- { 0, 1, { 1 }, 0L }, /* .1 */
- { 0, -1, { 1 }, 0L }, /* -.1 */
- { -1, 1, { 1 }, 0L }, /* ._1 */
- { -1, -1, { 1 }, 0L }, /* -._1 */
- { -999, 1, { 1 }, 0L }, /* .___1 small */
- { MP_EXP_T_MIN, 1, { 1 }, 0L }, /* .____1 very small */
- { 999, 1, { 1 }, 0L }, /* 1____. big */
- { MP_EXP_T_MAX, 1, { 1 }, 0L }, /* 1_____. very big */
- { 1, 2, { 999, 2 }, 2L }, /* 2.9 */
- { 5, 8, { 7, 8, 9, 3, 0, 0, 0, 1 }, 3L }, /* 10003.987 */
- { 2, 2, { M, M }, LONG_MAX }, /* FF. */
- { 2, 2, { M, M, M }, LONG_MAX }, /* FF.F */
- { 3, 3, { M, M, M }, LONG_MAX }, /* FFF. */
- #if GMP_NUMB_BITS >= BITS_PER_ULONG
- /* normal case, numb bigger than long */
- { 2, 1, { 1 }, 0L }, /* 1_. */
- { 2, 2, { 0, 1 }, 0L }, /* 10. */
- { 2, 2, { 999, 1 }, 999L }, /* 19. */
- { 3, 2, { 999, 1 }, 0L }, /* 19_. */
- #else
- /* nails case, numb smaller than long */
- { 2, 1, { 1 }, 1L << GMP_NUMB_BITS }, /* 1_. */
- { 3, 1, { 1 }, 0L }, /* 1__. */
- { 2, 2, { 99, 1 }, 99L + (1L << GMP_NUMB_BITS) }, /* 19. */
- { 3, 2, { 1, 99 }, 1L << GMP_NUMB_BITS }, /* 91_. */
- { 3, 3, { 0, 1, 99 }, 1L << GMP_NUMB_BITS }, /* 910. */
- #endif
- };
- mpf_t f;
- unsigned long got;
- int i;
- mp_limb_t buf[20 + numberof(data[i].d)];
- for (i = 0; i < numberof (data); i++)
- {
- refmpn_fill (buf, 10, CNST_LIMB(0xDEADBEEF));
- refmpn_copy (buf+10, data[i].d, ABS(data[i].size));
- refmpn_fill (buf+10+ABS(data[i].size), 10, CNST_LIMB(0xDEADBEEF));
- PTR(f) = buf+10;
- EXP(f) = data[i].exp;
- SIZ(f) = data[i].size;
- PREC(f) = numberof (data[i].d);
- MPF_CHECK_FORMAT (f);
- got = mpf_get_si (f);
- if (got != data[i].want)
- {
- printf ("mpf_get_si wrong at limb data[%d]n", i);
- mpf_trace (" f", f);
- mpn_trace (" d", data[i].d, data[i].size);
- printf (" size %ldn", (long) data[i].size);
- printf (" exp %ldn", (long) data[i].exp);
- printf (" got %lu (0x%lX)n", got, got);
- printf (" want %lu (0x%lX)n", data[i].want, data[i].want);
- abort();
- }
- }
- }
- int
- main (void)
- {
- tests_start ();
- check_data ();
- check_max ();
- check_limbdata ();
- tests_end ();
- exit (0);
- }