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      1 /****************************************************************
      2 
      3 The author of this software is David M. Gay.
      4 
      5 Copyright (C) 1998 by Lucent Technologies
      6 All Rights Reserved
      7 
      8 Permission to use, copy, modify, and distribute this software and
      9 its documentation for any purpose and without fee is hereby
     10 granted, provided that the above copyright notice appear in all
     11 copies and that both that the copyright notice and this
     12 permission notice and warranty disclaimer appear in supporting
     13 documentation, and that the name of Lucent or any of its entities
     14 not be used in advertising or publicity pertaining to
     15 distribution of the software without specific, written prior
     16 permission.
     17 
     18 LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
     19 INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
     20 IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
     21 SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
     22 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
     23 IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
     24 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
     25 THIS SOFTWARE.
     26 
     27 ****************************************************************/
     28 
     29 /* Please send bug reports to David M. Gay (dmg at acm dot org,
     30  * with " at " changed at "@" and " dot " changed to ".").	*/
     31 
     32 #include <stdio.h>
     33 #include <stdlib.h>
     34 
     35 static char *dir[4] = { "toward zero", "nearest", "toward +Infinity",
     36 			"toward -Infinity" };
     37 
     38 #ifdef Honor_FLT_ROUNDS
     39 #include <fenv.h>
     40 static int fe_conv[4] = {FE_TOWARDZERO, FE_TONEAREST, FE_UPWARD, FE_DOWNWARD };
     41 #endif
     42 
     43  int
     44 #ifdef KR_headers
     45 getround(r, s) int r; char *s;
     46 #else
     47 getround(int r, char *s)
     48 #endif
     49 {
     50 	int i;
     51 
     52 	while(*++s <= ' ') {
     53 		if (!*s) {
     54 			printf("Current round mode for strtor... is %d (%s).\n",
     55 				r, dir[r]);
     56 			return r;
     57 			}
     58 		}
     59 	i = atoi(s);
     60 	if (i >= 0 && i < 4) {
     61 		printf("Rounding mode for strtor... ");
     62 		if (i == r)
     63 			printf("was and is %d (%s)\n", i, dir[i]);
     64 		else
     65 			printf("changed from %d (%s) to %d (%s)\n",
     66 				r, dir[r], i, dir[i]);
     67 #ifdef Honor_FLT_ROUNDS
     68 		fesetround(fe_conv[i]);
     69 #endif
     70 		return i;
     71 		}
     72 	printf("Bad rounding direction %d: choose among\n", i);
     73 	for(i = 0; i < 4; i++)
     74 		printf("\t%d (%s)\n", i, dir[i]);
     75 	printf("Leaving rounding mode for strtor... at %d (%s)\n", r, dir[r]);
     76 	return r;
     77 	}
     78 
     79 #ifdef USE_MY_LOCALE
     80 #include <locale.h>
     81 
     82  struct lconv *
     83 localeconv(void)
     84 {
     85 	static struct lconv mylocale;
     86 	mylocale.decimal_point = "<Pt>";
     87 	return &mylocale;
     88 	}
     89 #endif
     90 
     91