diff options
Diffstat (limited to 'libc')
| -rw-r--r-- | libc/misc/time/time.c | 87 |
1 files changed, 65 insertions, 22 deletions
diff --git a/libc/misc/time/time.c b/libc/misc/time/time.c index e2dadc211..5bda87039 100644 --- a/libc/misc/time/time.c +++ b/libc/misc/time/time.c @@ -97,8 +97,8 @@ * Bug reported by Arne Bernin <arne@alamut.de> in regards to freeswan. * * July 27, 2003 Adjust the struct tm extension field support. - * Change __tm_tzone back to a ptr and add the __tm_tzname[] buffer for - * __tm_tzone to point to. This gets around complaints from g++. + * Change __tm_zone back to a ptr and add the __tm_tzname[] buffer for + * __tm_zone to point to. This gets around complaints from g++. * Who knows... it might even fix the PPC timezone init problem. * * July 29, 2003 Fix a bug in mktime behavior when tm_isdst was -1. @@ -119,6 +119,13 @@ * unambiguous (not falling in the dst<->st transition region) both * uClibc and glibc should produce the same result for mktime. * + * Oct 31, 2003 Kill the seperate __tm_zone and __tm_tzname[] and which + * doesn't work if you want the memcpy the struct. Sigh... I didn't + * think about that. So now, when the extensions are enabled, we + * malloc space when necessary and keep the timezone names in a linked + * list. + * + * Fix a dst-related bug which resulted in use of uninitialized data. */ #define _GNU_SOURCE @@ -512,6 +519,47 @@ struct tm *localtime(const time_t *timer) /**********************************************************************/ #ifdef L_localtime_r +#ifdef __UCLIBC_HAS_TM_EXTENSIONS__ + +struct ll_tzname_item; + +typedef struct ll_tzname_item { + struct ll_tzname_item *next; + char tzname[TZNAME_MAX+1]; +} ll_tzname_item_t; + +static ll_tzname_item_t ll_tzname[] = { + { ll_tzname + 1, "UTC" }, /* Always 1st. */ + { NULL, "???" } /* Always 2nd. (invalid or out-of-memory) */ +}; + +const char *lookup_tzname(const char *key) +{ + ll_tzname_item_t *p; + + for (p=ll_tzname ; p ; p=p->next) { + if (!strcmp(p->tzname, key)) { + return p->tzname; + } + } + + /* Hmm... a new name. */ + if (strnlen(key, TZNAME_MAX+1) < TZNAME_MAX+1) { /* Verify legal length */ + if ((p = malloc(sizeof(ll_tzname_item_t))) != NULL) { + /* Insert as 3rd item in the list. */ + p->next = ll_tzname[1].next; + ll_tzname[1].next = p; + strcpy(p->tzname, key); + return p->tzname; + } + } + + /* Either invalid or couldn't alloc. */ + return ll_tzname[1].tzname; +} + +#endif /* __UCLIBC_HAS_TM_EXTENSIONS__ */ + static const unsigned char day_cor[] = { /* non-leap */ 31, 31, 34, 34, 35, 35, 36, 36, 36, 37, 37, 38, 38 /* 0, 0, 3, 3, 4, 4, 5, 5, 5, 6, 6, 7, 7 */ @@ -618,10 +666,9 @@ struct tm *localtime_r(register const time_t *__restrict timer, result->tm_isdst = dst; #ifdef __UCLIBC_HAS_TM_EXTENSIONS__ result->tm_gmtoff = - _time_tzinfo[dst].gmt_offset; - result->tm_zone = result->__tm_tzname; - strcpy(result->__tm_tzname, _time_tzinfo[dst].tzname); + result->tm_zone = lookup_tzname(_time_tzinfo[dst].tzname); #endif /* __UCLIBC_HAS_TM_EXTENSIONS__ */ - } while ((++dst < 2) && (result->tm_isdst = tm_isdst(result)) != 0); + } while ((++dst < 2) && ((result->tm_isdst = tm_isdst(result)) != 0)); TZUNLOCK; @@ -1698,13 +1745,8 @@ void tzset(void) #ifdef __UCLIBC_HAS_TZ_CACHING__ *oldval = 0; /* Set oldval to an empty string. */ #endif /* __UCLIBC_HAS_TZ_CACHING__ */ - _time_tzinfo[0].gmt_offset = 0L; - s = _time_tzinfo[0].tzname; - *s = 'U'; - *++s = 'T'; - *++s = 'C'; - *++s = - *_time_tzinfo[1].tzname = 0; + memset(_time_tzinfo, 0, 2*sizeof(rule_struct)); + strcpy(_time_tzinfo[0].tzname, UTC); goto DONE; } @@ -1774,6 +1816,7 @@ void tzset(void) new_rules[count].gmt_offset = off; if (!count) { + new_rules[1].gmt_offset = off; /* Shouldn't be needed... */ if (*e) { ++count; goto LOOP; @@ -1889,6 +1932,10 @@ static const unsigned char days[] = { 29, }; +#ifdef __UCLIBC_HAS_TM_EXTENSIONS__ +static const char utc_string[] = "UTC"; +#endif + /* Notes: * If time_t is 32 bits, then no overflow is possible. * It time_t is > 32 bits, this needs to be adjusted to deal with overflow. @@ -2018,14 +2065,7 @@ struct tm *_time_t2tm(const time_t *__restrict timer, p[4] = 0; /* result[8] .. tm_isdst */ #ifdef __UCLIBC_HAS_TM_EXTENSIONS__ result->tm_gmtoff = 0; - result->tm_zone = result->__tm_tzname; - { - register char *s = result->__tm_tzname; - *s = 'U'; - *++s = 'T'; - *++s = 'C'; - *++s = 0; - } + result->tm_zone = utc_string; #endif /* __UCLIBC_HAS_TM_EXTENSIONS__ */ return result; @@ -2064,8 +2104,11 @@ time_t _time_mktime(struct tm *timeptr, int store_on_success) memcpy(p, timeptr, sizeof(struct tm)); - if ((default_dst = p[8]) < 0) { - default_dst = 1; /* Assume advancing */ + if ((default_dst = p[8]) < 0) { /* Try to determing if dst? */ + default_dst = 1; /* Assume advancing. */ + if (!_time_tzinfo[1].tzname[0]) { /* Oops... no dst. */ + default_dst = p[8] = 0; + } } d = 400; |