ba237a9d91
Files correlati : Ricompilazione Demo : [ ] Commento : Aggiunti i sorgenti per Greenleaf Math Library (gfm.dll) git-svn-id: svn://10.65.10.50/trunk@10079 c028cbd2-c16b-5b4b-a496-9718f37d4682
149 lines
2.6 KiB
C
Executable File
149 lines
2.6 KiB
C
Executable File
/* char *ConvDecimalToAsciiRound(s, x, n)
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*
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* ARGUMENT
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* DEC *x;
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* char *s;
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* int n;
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*
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*
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* DESCRIPTION
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* Converts a DEC structure to an ascii string. A '-' will be printed
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* for negative numbers, but a '+' sign will never be printed. A decimal
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* point will be printed whenever the implied decimal is positive. Trailing
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* zeroes after the decimal point will be printed. The number will be
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* rounded to exactly n digits past the decimal point.
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*
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* SIDE EFFECTS
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* None.
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*
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* RETURNS
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* A string pointer if successful, NULL otherwise.
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*
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* POSSIBLE ERROR CODES
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*
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* GM_NULLPOINTER
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* GM_NULLSTRING
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* GM_INVALIDID
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* GM_CNVRW
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*
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* AUTHOR
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* Jared Levy Feb 1, 1987
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* Copyright (C) 1987-1990 Greenleaf Software Inc. All rights reserved.
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*
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* MODIFICATIONS
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*
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*/
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#include <stdio.h>
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#include <string.h>
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#include "gmsystem.h"
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char* ConvDecimalToAsciiRound( s, x, n)
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char *s;
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DEC *x;
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int n; /* 0...18 */
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{
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DEC a,*pa=&a;
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int i, wDigits, wOut;
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char t[GM_IMAXID * 2];
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_MacStart(GM_DTOAR);
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/* check for null string (no number to convert) */
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if(!s) {
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_MacErr(GM_NULLSTRING);
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_MacRet(NULL);
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}
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if (!x) {
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strcpy(s, "(null)");
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_MacErr(GM_NULLPOINTER);
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_MacRet (NULL);
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}
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if (_MacBad(x)) {
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strcpy(s, "(null)");
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_MacErr(GM_INIT);
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_MacRet (NULL);
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}
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if (n<GM_MINID) {
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_MacErr(GM_INVALIDID);
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n = GM_MINID;
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}
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if (n>GM_MAXID) {
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_MacErr(GM_INVALIDID);
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n = GM_MAXID;
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}
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wDigits = wOut = 0;
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/* preserve source integrity */
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_MacDCopy(pa,x);
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if(_MacIsDecN(pa)) {
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++wOut;
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}
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if (n < pa->dc.id) {
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/* wfGMRound indicated rounding or truncating in conversion */
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if (wfGMRound)
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_DivUnsArrByPwrOf10(pa->dc.sl, 5, pa->dc.id - n);
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else
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_DivUnsArrByPwrOf10Trunc(pa->dc.sl, 5, pa->dc.id - n);
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pa->dc.id = n;
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if (_MacIsDecZ(pa))
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wOut = 0;
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_MacErr(GM_CNVRW);
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}
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/* calculate wDigits */
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while(!(_MacIsDecZ(pa))) {
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i = (int) _DivUnsArrByUns(pa->dc.sl,10,5);
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t[wDigits] = (char) (i + 0x30);
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wDigits++;
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}
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/* precede by zeroes if necessary */
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for (; wDigits <= pa->dc.id; wDigits++)
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t[wDigits] = '0';
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/* add minus sign */
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if(wOut!=0) {
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s[0] = '-';
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}
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/* copy wDigits into string */
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for (wDigits--; wDigits >= 0; wDigits--) {
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if (wDigits == pa->dc.id - 1) {
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s[wOut] = '.';
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wOut++;
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}
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s[wOut] = t[wDigits];
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wOut++;
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}
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if (pa->dc.id < n) {
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if (pa->dc.id == 0) {
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s[wOut] = '.';
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wOut++;
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}
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for (i=pa->dc.id; i<n; i++) {
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s[wOut] = '0';
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wOut++;
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}
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}
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/* a # in the format string forces a decimal point */
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if (wfFlagNumber && n==0) {
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s[wOut] = '.';
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wOut++;
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}
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s[wOut] = '\0';
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_MacRet (s);
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}
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