don't allow negative zero; ``printf("%.3f", (double)-0.00005);''

[unix-history] / usr / src / lib / libc / stdio / fprintf.c

/*
* Copyright (c) 1980 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that this notice is preserved and that due credit is given
* to the University of California at Berkeley. The name of the University
* may not be used to endorse or promote products derived from this
* software without specific prior written permission. This software
* is provided ``as is'' without express or implied warranty.
*/

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)fprintf.c   5.3 (Berkeley) %G%";
#endif /* LIBC_SCCS and not lint */

#include <stdio.h>

fprintf(iop, fmt, args)
       register FILE *iop;
       char *fmt;
       int args;
{
       int len;
       char localbuf[BUFSIZ];

       if (iop->_flag & _IONBF) {
               iop->_flag &= ~_IONBF;
               iop->_ptr = iop->_base = localbuf;
               iop->_bufsiz = BUFSIZ;
               len = _doprnt(fmt, &args, iop);
               fflush(iop);
               iop->_flag |= _IONBF;
               iop->_base = NULL;
               iop->_bufsiz = NULL;
               iop->_cnt = 0;
       } else
               len = _doprnt(fmt, &args, iop);
       return(ferror(iop) ? EOF : len);
}