port/fp/func_decim.c

	func_decim.c revision 7257d1b4d25bfac0c802847390e98a464fd787ac
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (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 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#include "lint.h"
#include <sys/types.h>
#include <ctype.h>
#include <stdio.h>
#include "base_conversion.h"
#include <locale.h>

void
func_to_decimal(char **ppc, int nmax, int fortran_conventions,
        decimal_record *pd, enum decimal_string_form *pform,
        char **pechar, int (*pget)(void), int *pnread,
        int (*punget)(int))
{
    char    *cp = *ppc - 1; /* last character seen */
    char    *good = cp; /* last character accepted */
    int current;    /* *cp or EOF */
    int nread = 0;  /* number of characters read so far */

#define NEXT \
    if (nread < nmax) { \
        current = (*pget)(); \
        if (current != EOF) { \
            *++cp = (char)current; \
            nread++; \
        } \
    } else { \
        current = EOF; \
    }

    NEXT;

#include "char_to_decimal.h"

    if (punget != NULL) {
        /*
         * If we read any characters beyond the end of the accepted
         * token, try to push them back.
         */
        while (cp >= *ppc) {
            if ((*punget)((int)(unsigned char)*cp) == EOF)
                break;
            cp--;
            nread--;
        }
    }

    *++cp = '\0';
    *pnread = nread;
}