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Annotation of embedaddon/php/ext/bcmath/libbcmath/src/num2str.c, revision 1.1.1.1

1.1       misho       1: /* num2str.c: bcmath library file. */
                      2: /*
                      3:     Copyright (C) 1991, 1992, 1993, 1994, 1997 Free Software Foundation, Inc.
                      4:     Copyright (C) 2000 Philip A. Nelson
                      5: 
                      6:     This library is free software; you can redistribute it and/or
                      7:     modify it under the terms of the GNU Lesser General Public
                      8:     License as published by the Free Software Foundation; either
                      9:     version 2 of the License, or (at your option) any later version.
                     10: 
                     11:     This library is distributed in the hope that it will be useful,
                     12:     but WITHOUT ANY WARRANTY; without even the implied warranty of
                     13:     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
                     14:     Lesser General Public License for more details.  (COPYING.LIB)
                     15: 
                     16:     You should have received a copy of the GNU Lesser General Public
                     17:     License along with this library; if not, write to:
                     18: 
                     19:       The Free Software Foundation, Inc.
                     20:       59 Temple Place, Suite 330
                     21:       Boston, MA 02111-1307 USA.
                     22: 
                     23:     You may contact the author by:
                     24:        e-mail:  philnelson@acm.org
                     25:       us-mail:  Philip A. Nelson
                     26:                 Computer Science Department, 9062
                     27:                 Western Washington University
                     28:                 Bellingham, WA 98226-9062
                     29:        
                     30: *************************************************************************/
                     31: 
                     32: #include <config.h>
                     33: #include <stdio.h>
                     34: #include <assert.h>
                     35: #include <stdlib.h>
                     36: #include <ctype.h>
                     37: #include <stdarg.h>
                     38: #include "bcmath.h"
                     39: #include "private.h"
                     40: 
                     41: /* Convert a numbers to a string.  Base 10 only.*/
                     42: 
                     43: char
                     44: *bc_num2str (num)
                     45:       bc_num num;
                     46: {
                     47:   char *str, *sptr;
                     48:   char *nptr;
                     49:   int  index, signch;
                     50: 
                     51:   /* Allocate the string memory. */
                     52:   signch = ( num->n_sign == PLUS ? 0 : 1 );  /* Number of sign chars. */
                     53:   if (num->n_scale > 0)
                     54:     str = (char *) safe_emalloc (1, num->n_len + num->n_scale, 2 + signch);
                     55:   else
                     56:     str = (char *) safe_emalloc (1, num->n_len, 1 + signch);
                     57:   if (str == NULL) bc_out_of_memory();
                     58: 
                     59:   /* The negative sign if needed. */
                     60:   sptr = str;
                     61:   if (signch) *sptr++ = '-';
                     62: 
                     63:   /* Load the whole number. */
                     64:   nptr = num->n_value;
                     65:   for (index=num->n_len; index>0; index--)
                     66:     *sptr++ = BCD_CHAR(*nptr++);
                     67: 
                     68:   /* Now the fraction. */
                     69:   if (num->n_scale > 0)
                     70:     {
                     71:       *sptr++ = '.';
                     72:       for (index=0; index<num->n_scale; index++)
                     73:        *sptr++ = BCD_CHAR(*nptr++);
                     74:     }
                     75: 
                     76:   /* Terminate the string and return it! */
                     77:   *sptr = '\0';
                     78:   return (str);
                     79: }