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unzip-6.0/amiga/filedate.c  view on Meta::CPAN

    static char space[ENVSIZE];
    struct Process *me = (void *) FindTask(NULL);
    void *old_window = me->pr_WindowPtr;
    char *ret = NULL;

    me->pr_WindowPtr = (void *) -1;   /* suppress any "Please insert" popups */
    if (SysBase->LibNode.lib_Version >= ReqVers) {
        if (GetVar((char *) var, space, ENVSIZE - 1, /*GVF_GLOBAL_ONLY*/ 0) > 0)
            ret = space;
    } else {                    /* early AmigaDOS, get env var the crude way */
        BPTR hand, foot, spine;
        int z = 0;
        if (foot = Lock("ENV:", ACCESS_READ)) {
            spine = CurrentDir(foot);
            if (hand = Open((char *) var, MODE_OLDFILE)) {
                z = Read(hand, space, ENVSIZE - 1);
                Close(hand);
            }
            UnLock(CurrentDir(spine));
        }
        if (z > 0) {
            space[z] = '\0';
            ret = space;
        }
    }
    me->pr_WindowPtr = old_window;
    return ret;
}

#ifdef __SASC
int setenv(const char *var, const char *value, int overwrite)
{
    struct Process *me = (void *) FindTask(NULL);
    void *old_window = me->pr_WindowPtr;
    int ret = -1;

    me->pr_WindowPtr = (void *) -1;   /* suppress any "Please insert" popups */
    if (SysBase->LibNode.lib_Version >= ReqVers)
        ret = !SetVar((char *)var, (char *)value, -1, GVF_GLOBAL_ONLY | LV_VAR);
    else {
        BPTR hand, foot, spine;
        long len = value ? strlen(value) : 0;
        if (foot = Lock("ENV:", ACCESS_READ)) {
            spine = CurrentDir(foot);
            if (len) {
                if (hand = Open((char *) var, MODE_NEWFILE)) {
                    ret = Write(hand, (char *) value, len + 1) >= len;
                    Close(hand);
                }
            } else
                ret = DeleteFile((char *) var);
            UnLock(CurrentDir(spine));
        }
    }
    me->pr_WindowPtr = old_window;
    return ret;
}

/* Stores data from timezone and daylight to ENV:TZ.                  */
/* ENV:TZ is required to exist by some other SAS/C library functions, */
/* like stat() or fstat().                                            */
void set_TZ(long time_zone, int day_light)
{
    char put_tz[MAXTIMEZONELEN];  /* string for putenv: "TZ=aaabbb:bb:bbccc" */
    int offset;
    void *exists;     /* dummy ptr to see if global envvar TZ already exists */
    exists = (void *)getenv(TZ_ENVVAR);
    /* see if there is already an envvar TZ_ENVVAR. If not, create it */
    if (exists == NULL) {
        /* create TZ string by pieces: */
        sprintf(put_tz, "GMT%+ld", time_zone / 3600L);
        if (time_zone % 3600L) {
            offset = (int) labs(time_zone % 3600L);
            sprintf(put_tz + strlen(put_tz), ":%02d", offset / 60);
            if (offset % 60)
                sprintf(put_tz + strlen(put_tz), ":%02d", offset % 60);
        }
        if (day_light)
            strcat(put_tz,"DST");
        setenv(TZ_ENVVAR, put_tz, 1);
    }
}
#endif /* __SASC */

/* set state as well as possible from settings found in locale.library */
int GetPlatformLocalTimezone(sp, fill_tzstate_from_rules)
     register struct state * ZCONST sp;
     void (*fill_tzstate_from_rules)(struct state * ZCONST sp_res,
                                     ZCONST struct rule * ZCONST start,
                                     ZCONST struct rule * ZCONST end);
{
    struct Library *LocaleBase;
    struct Locale *ll;
    struct Process *me = (void *) FindTask(NULL);
    void *old_window = me->pr_WindowPtr;
    BPTR eh;
    int z, valid = FALSE;

    /* read timezone from locale.library if TZ envvar missing */
    me->pr_WindowPtr = (void *) -1;   /* suppress any "Please insert" popups */
    if (LocaleBase = OpenLibrary("locale.library", 0)) {
        if (ll = OpenLocale(NULL)) {
            z = ll->loc_GMTOffset;    /* in minutes */
            if (z == -300) {
                if (eh = Lock("ENV:sys/locale.prefs", ACCESS_READ)) {
                    UnLock(eh);
                    valid = TRUE;
                } else
                    z = 300; /* bug: locale not initialized, default bogus! */
            } else
                valid = TRUE;
            if (valid) {
                struct rule startrule, stoprule;

                sp->timecnt = 0;
                sp->typecnt = 1;
                sp->charcnt = 2;
                sp->chars[0] = sp->chars[1] = '\0';
                sp->ttis[0].tt_abbrind = 0;
                sp->ttis[1].tt_abbrind = 1;
                sp->ttis[0].tt_gmtoff = -z * MINSPERHOUR;