141 lines
3.9 KiB
C
141 lines
3.9 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 David M. Gay (dmg at acm dot org,
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* with " at " changed at "@" and " dot " changed to "."). */
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/* Test program for g_ffmt, strtof, strtoIf, strtopf, and strtorf.
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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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* #hex
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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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* hex is a string of <= 8 Hex digits for the internal representation
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* of the number, and ndig is a parameters to g_ffmt.
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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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extern int getround ANSI((int,char*));
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static char ibuf[2048], obuf[1024];
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#define U (unsigned long)
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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 dItry, i, i1, ndig = 0, r = 1;
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float f1, fI[2];
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union { float f; ULong L[1]; } u;
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while( (s = fgets(ibuf, sizeof(ibuf), stdin)) !=0) {
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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, "%lx", &u.L[0]); */
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u.L[0] = (ULong)strtoul(s+1, &se, 16);
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printf("\nInput: %s", ibuf);
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printf(" --> f = #%lx\n", U u.L[0]);
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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 = strtorf(ibuf, &se, r, &u.f);
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if (r == 1) {
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if (u.f != (i1 = strtopf(ibuf, &se1, &f1), f1)
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|| se != se1 || i != i1) {
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printf("***strtopf and strtorf disagree!!\n");
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if (u.f != f1)
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printf("\tf1 = %g\n", (double)f1);
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if (i != i1)
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printf("\ti = %d but i1 = %d\n", i, i1);
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if (se != se1)
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printf("se - se1 = %d\n", (int)(se-se1));
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}
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if (u.f != strtof(ibuf, &se1) || se != se1)
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printf("***strtof and strtorf disagree!\n");
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}
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printf("strtof consumes %d bytes and returns %.8g = #%lx\n",
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(int)(se-ibuf), u.f, U u.L[0]);
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fmt_test:
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se = g_ffmt(obuf, &u.f, ndig, sizeof(obuf));
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printf("g_ffmt(%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("strtoIf returns %d,", strtoIf(ibuf, &se, fI, &fI[1]));
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printf(" consuming %d bytes.\n", (int)(se-ibuf));
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if (fI[0] == fI[1]) {
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if (fI[0] == u.f)
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printf("fI[0] == fI[1] == strtof\n");
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else
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printf("fI[0] == fI[1] = #%lx = %.8g\n",
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U *(ULong*)fI, fI[0]);
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}
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else {
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printf("fI[0] = #%lx = %.8g\nfI[1] = #%lx = %.8g\n",
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U *(ULong*)fI, fI[0],
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U *(ULong*)&fI[1], fI[1]);
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if (fI[0] == u.f)
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printf("fI[0] == strtof\n");
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else if (fI[1] == u.f)
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printf("fI[1] == strtof\n");
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else
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printf("**** Both differ from strtof ****\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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