lib/lp/sdn.c

/*
 * 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   */


#pragma ident   "%Z%%M% %I% %E% SMI"    /* SVr4.0 1.5   */
/* 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);
}