/*
 * Copyright 2014 Garrett D'Amore <garrett@damore.org>
 * Copyright 2010 Nexenta Systems, Inc.  All rights reserved.
 * Copyright (c) 2000, 2001 Alexey Zelkin <phantom@FreeBSD.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include "lint.h"
#include <limits.h>
#include <stddef.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include "libc.h"
#include "ldpart.h"
#include "lmonetary.h"
#include "localeimpl.h"

extern const char *__fix_locale_grouping_str(const char *);

#define LCMONETARY_SIZE_FULL (sizeof (struct lc_monetary) / sizeof (char *))
#define LCMONETARY_SIZE_MIN \
        (offsetof(struct lc_monetary, int_p_cs_precedes) / sizeof (char *))

static char     empty[] = "";
static char     numempty[] = { CHAR_MAX, '\0' };

struct lc_monetary lc_monetary_posix = {
        empty,          /* int_curr_symbol */
        empty,          /* currency_symbol */
        empty,          /* mon_decimal_point */
        empty,          /* mon_thousands_sep */
        numempty,       /* mon_grouping */
        empty,          /* positive_sign */
        empty,          /* negative_sign */
        numempty,       /* int_frac_digits */
        numempty,       /* frac_digits */
        numempty,       /* p_cs_precedes */
        numempty,       /* p_sep_by_space */
        numempty,       /* n_cs_precedes */
        numempty,       /* n_sep_by_space */
        numempty,       /* p_sign_posn */
        numempty,       /* n_sign_posn */
        numempty,       /* int_p_cs_precedes */
        numempty,       /* int_n_cs_precedes */
        numempty,       /* int_p_sep_by_space */
        numempty,       /* int_n_sep_by_space */
        numempty,       /* int_p_sign_posn */
        numempty,       /* int_n_sign_posn */
        empty           /* crncystr */
};

struct locdata __posix_monetary_locdata = {
        .l_lname = "C",
        .l_data = { &lc_monetary_posix }
};

static char
cnv(const char *str)
{
        int i = strtol(str, NULL, 10);

        if (i == -1)
                i = CHAR_MAX;
        return ((char)i);
}

struct locdata *
__lc_monetary_load(const char *name)
{
        int ret;
        int clen;
        struct lc_monetary      *lmon;
        struct locdata          *ldata;

        if ((ldata = __locdata_alloc(name, sizeof (*lmon))) == NULL) {
                return (NULL);
        }
        lmon = ldata->l_data[0];

        ret = __part_load_locale(name, (char **)&ldata->l_data[1],
            "LC_MONETARY", LCMONETARY_SIZE_FULL, LCMONETARY_SIZE_MIN,
            (const char **)lmon);

        if (ret != _LDP_LOADED) {
                __locdata_free(ldata);
                errno = EINVAL;
                return (NULL);
        }

        /* special storage for currency string */
        clen = strlen(lmon->currency_symbol) + 2;
        ldata->l_data[2] = libc_malloc(clen);
        lmon->crncystr = ldata->l_data[2];

        lmon->mon_grouping = __fix_locale_grouping_str(lmon->mon_grouping);

#define M_ASSIGN_CHAR(NAME) \
        (((char *)lmon->NAME)[0] = cnv(lmon->NAME))

        M_ASSIGN_CHAR(int_frac_digits);
        M_ASSIGN_CHAR(frac_digits);
        M_ASSIGN_CHAR(p_cs_precedes);
        M_ASSIGN_CHAR(p_sep_by_space);
        M_ASSIGN_CHAR(n_cs_precedes);
        M_ASSIGN_CHAR(n_sep_by_space);
        M_ASSIGN_CHAR(p_sign_posn);
        M_ASSIGN_CHAR(n_sign_posn);

        /*
         * The six additional C99 international monetary formatting
         * parameters default to the national parameters when
         * reading FreeBSD LC_MONETARY data files.
         */
#define M_ASSIGN_ICHAR(NAME)                            \
        if (lmon->int_##NAME == NULL)                   \
                lmon->int_##NAME = lmon->NAME;          \
        else                                            \
                M_ASSIGN_CHAR(int_##NAME);

        M_ASSIGN_ICHAR(p_cs_precedes);
        M_ASSIGN_ICHAR(n_cs_precedes);
        M_ASSIGN_ICHAR(p_sep_by_space);
        M_ASSIGN_ICHAR(n_sep_by_space);
        M_ASSIGN_ICHAR(p_sign_posn);
        M_ASSIGN_ICHAR(n_sign_posn);

        /*
         * Now calculate the currency string (CRNCYSTR) for nl_langinfo.
         * This is a legacy SUSv2 interface.
         */
        if ((lmon->p_cs_precedes[0] == lmon->n_cs_precedes[0]) &&
            (lmon->currency_symbol[0] != '\0')) {
                char sign = '\0';
                switch (lmon->p_cs_precedes[0]) {
                case 0:
                        sign = '+';
                        break;
                case 1:
                        sign = '-';
                        break;
                case CHAR_MAX:
                        /*
                         * Substitute currency string for radix character.
                         * To the best of my knowledge, no locale uses this.
                         */
                        if (strcmp(lmon->mon_decimal_point,
                            lmon->currency_symbol) == 0)
                                sign = '.';
                        break;
                }
                (void) snprintf(lmon->crncystr, clen, "%c%s", sign,
                    lmon->currency_symbol);
        }

        return (ldata);
}