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/* num2str.c: bcmath library file. */
/*
Copyright (C) 1991, 1992, 1993, 1994, 1997 Free Software Foundation, Inc.
Copyright (C) 2000 Philip A. Nelson
This 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 2 of the License, or (at your option) any later version.
This 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. (COPYING.LIB)
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to:
The Free Software Foundation, Inc.
59 Temple Place, Suite 330
Boston, MA 02111-1307 USA.
You may contact the author by:
e-mail: philnelson@acm.org
us-mail: Philip A. Nelson
Computer Science Department, 9062
Western Washington University
Bellingham, WA 98226-9062
*************************************************************************/
#include <config.h>
#include <stdio.h>
#include <assert.h>
#include <stdlib.h>
#include <ctype.h>
#include <stdarg.h>
#include "bcmath.h"
#include "private.h"
/* Convert a numbers to a string. Base 10 only.*/
zend_string
*bc_num2str_ex (num, scale)
bc_num num;
int scale;
{
zend_string *str;
char *sptr;
char *nptr;
int index, signch;
/* Allocate the string memory. */
signch = ( num->n_sign == PLUS ? 0 : 1 ); /* Number of sign chars. */
if (scale > 0)
str = zend_string_alloc(num->n_len + scale + signch + 1, 0);
else
str = zend_string_alloc(num->n_len + signch, 0);
if (str == NULL) bc_out_of_memory();
/* The negative sign if needed. */
sptr = ZSTR_VAL(str);
if (signch) *sptr++ = '-';
/* Load the whole number. */
nptr = num->n_value;
for (index=num->n_len; index>0; index--)
*sptr++ = BCD_CHAR(*nptr++);
/* Now the fraction. */
if (scale > 0)
{
*sptr++ = '.';
for (index=0; index<scale && index<num->n_scale; index++)
*sptr++ = BCD_CHAR(*nptr++);
for (index = num->n_scale; index<scale; index++)
*sptr++ = BCD_CHAR(0);
}
/* Terminate the string and return it! */
*sptr = '\0';
ZSTR_LEN(str) = sptr - (char *)ZSTR_VAL(str);
return str;
}
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