initmon.c

C标准库源代码

/***
*initmon.c - contains __init_monetary
*
*       Copyright (c) 1991-1997, Microsoft Corporation. All rights reserved.
*
*Purpose:
*       Contains the locale-category initialization function: __init_monetary().
*
*       Each initialization function sets up locale-specific information
*       for their category, for use by functions which are affected by
*       their locale category.
*
*       *** For internal use by setlocale() only ***
*
*******************************************************************************/

#include <stdlib.h>
#include <windows.h>
#include <locale.h>
#include <setlocal.h>
#include <malloc.h>
#include <limits.h>
#include <dbgint.h>

static int __cdecl _get_lc_lconv(struct lconv *l);
static void __cdecl _free_lc_lconv(struct lconv *l);

/* Pointer to non-C locale lconv */
static struct lconv *__lconv_intl = NULL;

/*
 *  Note that __lconv_c is used when the monetary category is in the C locale
 *  but the numeric category may not necessarily be in the C locale.
 */


/***
*int __init_monetary() - initialization for LC_MONETARY locale category.
*
*Purpose:
*       In non-C locales, read the localized monetary strings into
*       __lconv_intl, and also copy the numeric strings from __lconv into
*       __lconv_intl.  Set __lconv to point to __lconv_intl.  The old
*       __lconv_intl is not freed until the new one is fully established.
*
*       In the C locale, the monetary fields in lconv are filled with
*       contain C locale values.  Any allocated __lconv_intl fields are freed.
*
*       At startup, __lconv points to a static lconv structure containing
*       C locale strings.  This structure is never used again if
*       __init_monetary is called.
*
*Entry:
*       None.
*
*Exit:
*       0 success
*       1 fail
*
*Exceptions:
*
*******************************************************************************/

int __cdecl __init_monetary (
        void
        )
{
        struct lconv *lc;

        if (__lc_handle[LC_MONETARY] != _CLOCALEHANDLE) {

                /* Allocate structure filled with NULL pointers */
                if ((lc = (struct lconv *)
                        _calloc_crt (1, sizeof(struct lconv))) == NULL)
                        return 1;

                if (_get_lc_lconv (lc)) {
                        _free_lc_lconv (lc);
                        _free_crt (lc);
                        return 1;
                }

                /* Copy numeric locale fields */
                lc->decimal_point = __lconv->decimal_point;
                lc->thousands_sep = __lconv->thousands_sep;
                lc->grouping = __lconv->grouping;

                __lconv = lc;                   /* point to new one */
                _free_lc_lconv (__lconv_intl);  /* free the old one */
                _free_crt (__lconv_intl);
                __lconv_intl = lc;
                return 0;

        } else {
                /*
                 *  Copy numeric locale fields (not necessarily C locale)
                 *  to static structure.  Note that __lconv_c numeric locale
                 *  fields may contain non-C locale information, but
                 *  monetary locale fields always contain C locale info.
                 */
                __lconv_c.decimal_point = __lconv->decimal_point;
                __lconv_c.thousands_sep = __lconv->thousands_sep;
                __lconv_c.grouping = __lconv->grouping;

                __lconv = &__lconv_c;           /* point to new one */

                _free_lc_lconv (__lconv_intl);  /* free the old one */
                _free_crt (__lconv_intl);
                __lconv_intl = NULL;
                return 0;
        }
}

static void fix_grouping(
        char *grouping
        )
{
        /*
         * ANSI specifies that the fields should contain "\3" [\3\0] to indicate
         * thousands groupings (100,000,000.00 for example).
         * NT uses "3;0"; ASCII 3 instead of value 3 and the ';' is extra.
         * So here we convert the NT version to the ANSI version.
         */

        while (*grouping)
        {
            /* convert '3' to '\3' */
            if (*grouping >= '0' && *grouping <= '9')
            {
                *grouping = *grouping - '0';
                grouping++;
            }

            /* remove ';' */
            else if (*grouping == ';')
            {
                char *tmp = grouping;

                do
                    *tmp = *(tmp+1);
                while (*++tmp);
            }

            /* unknown (illegal) character, ignore */
            else
                grouping++;
        }
}

/*
 *  Get the lconv fields.
 */
static int __cdecl _get_lc_lconv (
        struct lconv *l
        )
{
        int ret = 0;

        /* Currency is country--not language--dependent.  NT work-around. */
        LCID ctryid=MAKELCID(__lc_id[LC_MONETARY].wCountry, SORT_DEFAULT);

        if (l == NULL)
                return -1;

        ret |= __getlocaleinfo(LC_STR_TYPE, ctryid, LOCALE_SINTLSYMBOL, (void *)&l->int_curr_symbol);
        ret |= __getlocaleinfo(LC_STR_TYPE, ctryid, LOCALE_SCURRENCY, (void *)&l->currency_symbol);
        ret |= __getlocaleinfo(LC_STR_TYPE, ctryid, LOCALE_SMONDECIMALSEP, (void *)&l->mon_decimal_point);
        ret |= __getlocaleinfo(LC_STR_TYPE, ctryid, LOCALE_SMONTHOUSANDSEP, (void *)&l->mon_thousands_sep);
        ret |= __getlocaleinfo(LC_STR_TYPE, ctryid, LOCALE_SMONGROUPING, (void *)&l->mon_grouping);
        fix_grouping(l->mon_grouping);

        ret |= __getlocaleinfo(LC_STR_TYPE, ctryid, LOCALE_SPOSITIVESIGN, (void *)&l->positive_sign);
        ret |= __getlocaleinfo(LC_STR_TYPE, ctryid, LOCALE_SNEGATIVESIGN, (void *)&l->negative_sign);

        ret |= __getlocaleinfo(LC_INT_TYPE, ctryid, LOCALE_IINTLCURRDIGITS, (void *)&l->int_frac_digits);
        ret |= __getlocaleinfo(LC_INT_TYPE, ctryid, LOCALE_ICURRDIGITS, (void *)&l->frac_digits);
        ret |= __getlocaleinfo(LC_INT_TYPE, ctryid, LOCALE_IPOSSYMPRECEDES, (void *)&l->p_cs_precedes);
        ret |= __getlocaleinfo(LC_INT_TYPE, ctryid, LOCALE_IPOSSEPBYSPACE, (void *)&l->p_sep_by_space);
        ret |= __getlocaleinfo(LC_INT_TYPE, ctryid, LOCALE_INEGSYMPRECEDES, (void *)&l->n_cs_precedes);
        ret |= __getlocaleinfo(LC_INT_TYPE, ctryid, LOCALE_INEGSEPBYSPACE, (void *)&l->n_sep_by_space);
        ret |= __getlocaleinfo(LC_INT_TYPE, ctryid, LOCALE_IPOSSIGNPOSN, (void *)&l->p_sign_posn);
        ret |= __getlocaleinfo(LC_INT_TYPE, ctryid, LOCALE_INEGSIGNPOSN, (void *)&l->n_sign_posn);

        return ret;
}

/*
 *  Free the lconv strings.
 *  Numeric values do not need to be freed.
 */
static void __cdecl _free_lc_lconv (
        struct lconv *l
        )
{
        if (l == NULL)
                return;

        if (l->int_curr_symbol != __lconv_static_null)
        {
                _free_crt (l->int_curr_symbol);
                _free_crt (l->currency_symbol);
                _free_crt (l->mon_decimal_point);
                _free_crt (l->mon_thousands_sep);
                _free_crt (l->mon_grouping);
                _free_crt (l->positive_sign);
                _free_crt (l->negative_sign);
        }
        /* Don't need to make these pointers NULL */
}