port/locale/lmonetary.c

/*
 * 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);
}