177 lines
4.7 KiB
C
177 lines
4.7 KiB
C
/****************************************************************
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The author of this software is David M. Gay.
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Copyright (C) 1998-2001 by Lucent Technologies
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and
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its documentation for any purpose and without fee is hereby
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granted, provided that the above copyright notice appear in all
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copies and that both that the copyright notice and this
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permission notice and warranty disclaimer appear in supporting
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documentation, and that the name of Lucent or any of its entities
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not be used in advertising or publicity pertaining to
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distribution of the software without specific, written prior
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permission.
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LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
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IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
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SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
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IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
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THIS SOFTWARE.
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****************************************************************/
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/* Please send bug reports to
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David M. Gay
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Bell Laboratories, Room 2C-463
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600 Mountain Avenue
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Murray Hill, NJ 07974-0636
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U.S.A.
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dmg@bell-labs.com
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*/
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/* Test program for g_xfmt, strtoIx, strtopx, and strtorx.
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*
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* Inputs (on stdin):
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* r rounding_mode
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* n ndig
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* number
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* #hex0 hex1 hex2 hex3 hex4
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*
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* rounding_mode values:
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* 0 = toward zero
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* 1 = nearest
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* 2 = toward +Infinity
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* 3 = toward -Infinity
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*
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* where number is a decimal floating-point number,
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* hex0 is a string of <= 4 Hex digits for the most significant
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* half-word of the number, hex1 is a similar string for the next
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* half-word, etc., and ndig is a parameters to g_xfmt.
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*/
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#include "gdtoa.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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extern int getround ANSI((int,char*));
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static char ibuf[2048], obuf[2048];
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#undef _0
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#undef _1
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/* one or the other of IEEE_MC68k or IEEE_8087 should be #defined */
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#ifdef IEEE_MC68k
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#define _0 0
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#define _1 1
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#define _2 2
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#define _3 3
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#define _4 4
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#endif
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#ifdef IEEE_8087
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#define _0 4
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#define _1 3
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#define _2 2
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#define _3 1
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#define _4 0
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#endif
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int
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main(Void)
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{
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char *s, *se, *se1;
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int i, dItry, ndig = 0, r = 1;
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union { long double d; UShort bits[5]; } u, v[2];
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while(s = fgets(ibuf, sizeof(ibuf), stdin)) {
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while(*s <= ' ')
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if (!*s++)
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continue;
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dItry = 0;
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switch(*s) {
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case 'r':
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r = getround(r, s);
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continue;
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case 'n':
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i = s[1];
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if (i <= ' ' || i >= '0' && i <= '9') {
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ndig = atoi(s+1);
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continue;
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}
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break; /* nan? */
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case '#':
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sscanf(s+1, "%hx %hx %hx %hx hx", &u.bits[_0],
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&u.bits[_1], &u.bits[_2], &u.bits[_3],
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&u.bits[_4]);
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printf("\nInput: %s", ibuf);
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printf(" --> f = #%x %x %x %x %x\n", u.bits[_0],
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u.bits[_1], u.bits[_2], u.bits[_3], u.bits[4]);
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goto fmt_test;
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}
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dItry = 1;
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printf("\nInput: %s", ibuf);
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i = strtorx(ibuf, &se, r, u.bits);
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if (r == 1 && (i != strtopx(ibuf, &se1, v[0].bits) || se1 != se
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|| memcmp(u.bits, v[0].bits, 10)))
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printf("***strtox and strtorx disagree!!\n:");
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printf("\nstrtox consumes %d bytes and returns %d\n",
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(int)(se-ibuf), i);
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printf("with bits = #%x %x %x %x %x\n",
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u.bits[_0], u.bits[_1], u.bits[_2],
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u.bits[_3], u.bits[_4]);
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if (sizeof(long double) == 12)
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printf("printf(\"%%.21Lg\") gives %.21Lg\n", u.d);
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fmt_test:
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se = g_xfmt(obuf, u.bits, ndig, sizeof(obuf));
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printf("g_xfmt(%d) gives %d bytes: \"%s\"\n\n",
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ndig, (int)(se-obuf), se ? obuf : "<null>");
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if (!dItry)
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continue;
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printf("strtoIx returns %d,",
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strtoIx(ibuf, &se, v[0].bits, v[1].bits));
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printf(" consuming %d bytes.\n", (int)(se-ibuf));
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if (!memcmp(v[0].bits, v[1].bits, 10)) {
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if (!memcmp(u.bits, v[0].bits, 10))
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printf("fI[0] == fI[1] == strtox\n");
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else {
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printf("fI[0] == fI[1] = #%x %x %x %x %x\n",
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v[0].bits[_0], v[0].bits[_1],
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v[0].bits[_2], v[0].bits[_3],
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v[0].bits[_4]);
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if (sizeof(long double) == 12)
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printf("= %.21Lg\n", v[0].d);
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}
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}
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else {
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printf("fI[0] = #%x %x %x %x %x\n",
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v[0].bits[_0], v[0].bits[_1],
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v[0].bits[_2], v[0].bits[_3],
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v[0].bits[_4]);
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if (sizeof(long double) == 12)
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printf("= %.21Lg\n", v[0].d);
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printf("fI[1] = #%x %x %x %x %x\n",
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v[1].bits[_0], v[1].bits[_1],
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v[1].bits[_2], v[0].bits[_3],
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v[0].bits[_4]);
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if (sizeof(long double) == 12)
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printf("= %.21Lg\n", v[1].d);
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if (!memcmp(v[0].bits, u.bits, 10))
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printf("fI[0] == strtox\n");
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else if (!memcmp(v[1].bits, u.bits, 10))
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printf("fI[1] == strtox\n");
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else
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printf("**** Both differ from strtod ****\n");
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}
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printf("\n");
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}
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return 0;
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}
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