/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 1997 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/*        All Rights Reserved   */

/* EMACS_MODES: !fill, lnumb, !overwrite, !nodelete, !picture */

#include "stdio.h"
#include "string.h"
#include "stdlib.h"

#include "lp.h"

#define N_COMPRESSED    9999

/**
 ** printsdn() - PRINT A SCALED DECIMAL NUMBER NICELY
 **/

#define DFLT_PREFIX     0
#define DFLT_SUFFIX     0
#define DFLT_NEWLINE    "\n"

static char             *print_prefix   = DFLT_PREFIX,
                        *print_suffix   = DFLT_SUFFIX,
                        *print_newline  = DFLT_NEWLINE;

void
printsdn_setup(char *prefix, char *suffix, char *newline)
{
        if (prefix)
                print_prefix = prefix;
        if (suffix)
                print_suffix = suffix;
        if (newline)
                print_newline = newline;
        return;
}

void
printsdn_unsetup ()
{
        print_prefix = DFLT_PREFIX;
        print_suffix = DFLT_SUFFIX;
        print_newline = DFLT_NEWLINE;
        return;
}


void
printsdn(FILE *fp, SCALED sdn)
{
        fdprintsdn(fileno(fp), sdn);
}


void
fdprintsdn(int fd, SCALED sdn)
{
        register char           *dec = "9999.999",
                                *z;

        if (sdn.val <= 0)
                return;

        (void)fdprintf (fd, "%s", NB(print_prefix));

        /*
         * Let's try to be a bit clever in dealing with decimal
         * numbers. If the number is an integer, don't print
         * a decimal point. If it isn't an integer, strip trailing
         * zeros from the fraction part, and don't print more
         * than the thousandths place.
         */
        if (-1000. < sdn.val && sdn.val < 10000.) {

                /*
                 * Printing 0 will give us 0.000.
                 */
                sprintf (dec, "%.3f", sdn.val);

                /*
                 * Skip zeroes from the end until we hit
                 * '.' or not-0. If we hit '.', clobber it;
                 * if we hit not-0, it has to be in fraction
                 * part, so leave it.
                 */
                z = dec + strlen(dec) - 1;
                while (*z == '0' && *z != '.')
                        z--;
                if (*z == '.')
                        *z = '\0';
                else
                        *++z = '\0';

                (void)fdprintf(fd, "%s", dec);

        } else
                (void)fdprintf(fd, "%.3f", sdn.val);

        if (sdn.sc == 'i' || sdn.sc == 'c')
                fdputc(sdn.sc, fd);

        (void)fdprintf(fd, "%s%s", NB(print_suffix), NB(print_newline));
        return;
}


/**
 ** _getsdn() - PARSE SCALED DECIMAL NUMBER
 **/

SCALED
_getsdn(char *str, char **p_after, int is_cpi)
{
        static SCALED           sdn     = { 0.0 , 0 };

        char *                  rest;


        /*
         * A nonzero "errno" is our only method of indicating error.
         */
        errno = 0;

        if (is_cpi && STREQU(str, NAME_PICA)) {
                sdn.val = 10;
                sdn.sc = 0;
                if (p_after)
                        *p_after = str + strlen(NAME_PICA);

        } else if (is_cpi && STREQU(str, NAME_ELITE)) {
                sdn.val = 12;
                sdn.sc = 0;
                if (p_after)
                        *p_after = str + strlen(NAME_ELITE);

        } else if (is_cpi && STREQU(str, NAME_COMPRESSED)) {
                sdn.val = N_COMPRESSED;
                sdn.sc = 0;
                if (p_after)
                        *p_after = str + strlen(NAME_COMPRESSED);

        } else {
                sdn.val = strtod(str, &rest);
                if (sdn.val <= 0) {
                        lp_errno = LP_EBADSDN;
                        errno = EINVAL;
                        return (sdn);
                }

                while (*rest && *rest == ' ')
                        rest++;

                switch (*rest) {
                case 0:
                        sdn.sc = 0;
                        if (p_after)
                                *p_after = rest;
                        break;
                case 'i':
                case 'c':
                        sdn.sc = *rest++;
                        if (p_after)
                                *p_after = rest;
                        break;
                default:
                        lp_errno = LP_EBADSDN;
                        errno = EINVAL;
                        sdn.sc = 0;
                        break;
                }
        }

        return (sdn);
}