diff options
Diffstat (limited to 'time/tzfile.c')
| -rw-r--r-- | time/tzfile.c | 47 |
1 files changed, 24 insertions, 23 deletions
diff --git a/time/tzfile.c b/time/tzfile.c index 1d51a69..eca09e2 100644 --- a/time/tzfile.c +++ b/time/tzfile.c @@ -60,6 +60,7 @@ static size_t num_leaps; static struct leap *leaps = NULL; #include <endian.h> +#include <byteswap.h> /* Decode the four bytes at PTR as a signed integer in network byte order. */ static inline int @@ -67,6 +68,8 @@ decode (const void *ptr) { if ((BYTE_ORDER == BIG_ENDIAN) && sizeof (int) == 4) return *(const int *) ptr; + else if (BYTE_ORDER == LITTLE_ENDIAN && sizeof (int) == 4) + return bswap_32 (*(const int *) ptr); else { const unsigned char *p = ptr; @@ -157,7 +160,7 @@ __tzfile_read (const char *file) if (f == NULL) return; - if (fread ((void *) &tzhead, sizeof (tzhead), 1, f) != 1) + if (fread_unlocked ((void *) &tzhead, sizeof (tzhead), 1, f) != 1) goto lose; num_transitions = (size_t) decode (tzhead.tzh_timecnt); @@ -198,8 +201,8 @@ __tzfile_read (const char *file) if (sizeof (time_t) < 4) abort (); - if (fread(transitions, 4, num_transitions, f) != num_transitions || - fread(type_idxs, 1, num_transitions, f) != num_transitions) + if (fread_unlocked (transitions, 4, num_transitions, f) != num_transitions + || fread_unlocked (type_idxs, 1, num_transitions, f) != num_transitions) goto lose; /* Check for bogus indices in the data file, so we can hereafter @@ -222,32 +225,32 @@ __tzfile_read (const char *file) for (i = 0; i < num_types; ++i) { unsigned char x[4]; - if (fread (x, 1, 4, f) != 4 || - fread (&types[i].isdst, 1, 1, f) != 1 || - fread (&types[i].idx, 1, 1, f) != 1) + if (fread_unlocked (x, 1, 4, f) != 4 + || fread_unlocked (&types[i].isdst, 1, 1, f) != 1 + || fread_unlocked (&types[i].idx, 1, 1, f) != 1) goto lose; if (types[i].idx >= chars) /* Bogus index in data file. */ goto lose; types[i].offset = (long int) decode (x); } - if (fread (zone_names, 1, chars, f) != chars) + if (fread_unlocked (zone_names, 1, chars, f) != chars) goto lose; for (i = 0; i < num_leaps; ++i) { unsigned char x[4]; - if (fread (x, 1, sizeof (x), f) != sizeof (x)) + if (fread_unlocked (x, 1, sizeof (x), f) != sizeof (x)) goto lose; leaps[i].transition = (time_t) decode (x); - if (fread (x, 1, sizeof (x), f) != sizeof (x)) + if (fread_unlocked (x, 1, sizeof (x), f) != sizeof (x)) goto lose; leaps[i].change = (long int) decode (x); } for (i = 0; i < num_isstd; ++i) { - int c = getc (f); + int c = getc_unlocked (f); if (c == EOF) goto lose; types[i].isstd = c != 0; @@ -257,7 +260,7 @@ __tzfile_read (const char *file) for (i = 0; i < num_isgmt; ++i) { - int c = getc (f); + int c = getc_unlocked (f); if (c == EOF) goto lose; types[i].isgmt = c != 0; @@ -271,8 +274,7 @@ __tzfile_read (const char *file) We choose the offsets in the types of each flavor that are transitioned to earliest in time. */ __tzname[1] = NULL; - for (i = 0; i < num_types && i < sizeof (__tzname) / sizeof (__tzname[0]); - ++i) + for (i = 0; i < num_types; ++i) __tzname[types[i].isdst] = __tzstring (&zone_names[types[i].idx]); if (__tzname[1] == NULL) __tzname[1] = __tzname[0]; @@ -296,8 +298,8 @@ __tzfile_read (const char *file) __use_tzfile = 1; return; - lose:; - fclose(f); + lose: + fclose (f); } /* The user specified a hand-made timezone, but not its DST rules. @@ -425,10 +427,8 @@ __tzfile_compute (time_t timer, int use_localtime, __daylight = rule_stdoff != rule_dstoff; __timezone = -rule_stdoff; __tzname[1] = NULL; - for (i = 0; - i < num_types && i < sizeof (__tzname) / sizeof (__tzname[0]); - ++i) - __tzname[types[i].isdst] = &zone_names[types[i].idx]; + for (i = 0; i < num_types; ++i) + __tzname[types[i].isdst] = __tzstring (&zone_names[types[i].idx]); if (__tzname[1] == NULL) /* There is no daylight saving time. */ __tzname[1] = __tzname[0]; @@ -455,9 +455,9 @@ __tzfile_compute (time_t timer, int use_localtime, leaps[i].change > leaps[i - 1].change)) { *leap_hit = 1; - while (i > 0 && - leaps[i].transition == leaps[i - 1].transition + 1 && - leaps[i].change == leaps[i - 1].change + 1) + while (i > 0 + && leaps[i].transition == leaps[i - 1].transition + 1 + && leaps[i].change == leaps[i - 1].change + 1) { ++*leap_hit; --i; @@ -483,5 +483,6 @@ compute_tzname_max (size_t chars) ++p; if ((size_t) (p - start) > __tzname_cur_max) __tzname_cur_max = p - start; - } while (++p < &zone_names[chars]); + } + while (++p < &zone_names[chars]); } |