gmio/src/gmio_core/internal/locale_utils.c

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#include "locale_utils.h"

#include "../error.h"
#include "string_ascii_utils.h"

#include <locale.h>
#include <stddef.h>
#include <string.h>

const char *gmio_lc_numeric()
{
    const char* lcnum = setlocale(LC_NUMERIC, NULL);
    return lcnum != NULL ? lcnum : "";
}

bool gmio_lc_numeric_is_C()
{
    const char* lc = gmio_lc_numeric();
    return (gmio_ascii_stricmp(lc, "C") == 0
            || gmio_ascii_stricmp(lc, "POSIX") == 0);
}

static char global_lc_numeric[64] = {0};

void gmio_lc_numeric_save()
{
    /* Save LC_NUMERIC
     * POSIX specifies that the pointer returned by setlocale(), not just the
     * contents of the pointed-to string, may be invalidated by subsequent calls
     * to setlocale */
    strncpy(global_lc_numeric,
            setlocale(LC_NUMERIC, NULL),
            GMIO_ARRAY_SIZE(global_lc_numeric));
}

void gmio_lc_numeric_restore()
{
    if (global_lc_numeric[0] != '\0')
        setlocale(LC_NUMERIC, global_lc_numeric);
}