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glib2.23780
glib2-add-support-for-slim-timezone-format.patch
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File glib2-add-support-for-slim-timezone-format.patch of Package glib2.23780
diff --git a/glib/gtimezone.c b/glib/gtimezone.c index 0bea41297..5fe924fd0 100644 --- a/glib/gtimezone.c +++ b/glib/gtimezone.c @@ -142,9 +142,7 @@ typedef struct gint mday; gint wday; gint week; - gint hour; - gint min; - gint sec; + gint32 offset; /* hour*3600 + min*60 + sec; can be negative. */ } TimeZoneDate; /* POSIX Timezone abbreviations are typically 3 or 4 characters, but @@ -205,6 +203,10 @@ static GTimeZone *tz_local = NULL; there's no point in getting carried away. */ +#ifdef G_OS_UNIX +static GTimeZone *parse_footertz (const gchar *, size_t); +#endif + /** * g_time_zone_unref: * @tz: a #GTimeZone @@ -286,13 +288,20 @@ g_time_zone_ref (GTimeZone *tz) /* fake zoneinfo creation (for RFC3339/ISO 8601 timezones) {{{1 */ /* * parses strings of the form h or hh[[:]mm[[[:]ss]]] where: - * - h[h] is 0 to 23 + * - h[h] is 0 to 24 * - mm is 00 to 59 * - ss is 00 to 59 + * If RFC8536, TIME_ is a transition time sans sign, + * so colons are required before mm and ss, and hh can be up to 167. + * See Internet RFC 8536 section 3.3.1: + * https://tools.ietf.org/html/rfc8536#section-3.3.1 + * and POSIX Base Definitions 8.3 TZ rule time: + * https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap08.html#tag_08_03 */ static gboolean parse_time (const gchar *time_, - gint32 *offset) + gint32 *offset, + gboolean rfc8536) { if (*time_ < '0' || '9' < *time_) return FALSE; @@ -310,7 +319,20 @@ parse_time (const gchar *time_, *offset *= 10; *offset += 60 * 60 * (*time_++ - '0'); - if (*offset > 23 * 60 * 60) + if (rfc8536) + { + /* Internet RFC 8536 section 3.3.1 and POSIX 8.3 TZ together say + that a transition time must be of the form [+-]hh[:mm[:ss]] where + the hours part can range from -167 to 167. */ + if ('0' <= *time_ && *time_ <= '9') + { + *offset *= 10; + *offset += 60 * 60 * (*time_++ - '0'); + } + if (*offset > 167 * 60 * 60) + return FALSE; + } + else if (*offset > 24 * 60 * 60) return FALSE; if (*time_ == '\0') @@ -319,6 +341,8 @@ parse_time (const gchar *time_, if (*time_ == ':') time_++; + else if (rfc8536) + return FALSE; if (*time_ < '0' || '5' < *time_) return FALSE; @@ -335,6 +359,8 @@ parse_time (const gchar *time_, if (*time_ == ':') time_++; + else if (rfc8536) + return FALSE; if (*time_ < '0' || '5' < *time_) return FALSE; @@ -351,28 +377,32 @@ parse_time (const gchar *time_, static gboolean parse_constant_offset (const gchar *name, - gint32 *offset) + gint32 *offset, + gboolean rfc8536) { - if (g_strcmp0 (name, "UTC") == 0) + /* Internet RFC 8536 section 3.3.1 and POSIX 8.3 TZ together say + that a transition time must be numeric. */ + if (!rfc8536 && g_strcmp0 (name, "UTC") == 0) { *offset = 0; return TRUE; } if (*name >= '0' && '9' >= *name) - return parse_time (name, offset); + return parse_time (name, offset, rfc8536); switch (*name++) { case 'Z': *offset = 0; - return !*name; + /* Internet RFC 8536 section 3.3.1 requires a numeric zone. */ + return !rfc8536 && !*name; case '+': - return parse_time (name, offset); + return parse_time (name, offset, rfc8536); case '-': - if (parse_time (name, offset)) + if (parse_time (name, offset, rfc8536)) { *offset = -*offset; return TRUE; @@ -391,7 +421,7 @@ zone_for_constant_offset (GTimeZone *gtz, const gchar *name) gint32 offset; TransitionInfo info; - if (name == NULL || !parse_constant_offset (name, &offset)) + if (name == NULL || !parse_constant_offset (name, &offset, FALSE)) return; info.gmt_offset = offset; @@ -529,12 +559,19 @@ init_zone_from_iana_info (GTimeZone *gtz, guint8 *tz_transitions, *tz_type_index, *tz_ttinfo; guint8 *tz_abbrs; gsize timesize = sizeof (gint32); - const struct tzhead *header = g_bytes_get_data (zoneinfo, &size); + gconstpointer header_data = g_bytes_get_data (zoneinfo, &size); + const gchar *data = header_data; + const struct tzhead *header = header_data; + GTimeZone *footertz = NULL; + guint extra_time_count = 0, extra_type_count = 0; + gint64 last_explicit_transition_time; g_return_if_fail (size >= sizeof (struct tzhead) && memcmp (header, "TZif", 4) == 0); - if (header->tzh_version == '2') + /* FIXME: Handle invalid TZif files better (Issue#1088). */ + + if (header->tzh_version >= '2') { /* Skip ahead to the newer 64-bit data if it's available. */ header = (const struct tzhead *) @@ -550,6 +587,30 @@ init_zone_from_iana_info (GTimeZone *gtz, time_count = guint32_from_be(header->tzh_timecnt); type_count = guint32_from_be(header->tzh_typecnt); + if (header->tzh_version >= '2') + { + const gchar *footer = (((const gchar *) (header + 1)) + + guint32_from_be(header->tzh_ttisgmtcnt) + + guint32_from_be(header->tzh_ttisstdcnt) + + 12 * guint32_from_be(header->tzh_leapcnt) + + 9 * time_count + + 6 * type_count + + guint32_from_be(header->tzh_charcnt)); + const gchar *footerlast; + size_t footerlen; + g_return_if_fail (footer <= data + size - 2 && footer[0] == '\n'); + footerlast = memchr (footer + 1, '\n', data + size - (footer + 1)); + g_return_if_fail (footerlast); + footerlen = footerlast + 1 - footer; + if (footerlen != 2) + { + footertz = parse_footertz (footer, footerlen); + g_return_if_fail (footertz); + extra_type_count = footertz->t_info->len; + extra_time_count = footertz->transitions->len; + } + } + tz_transitions = ((guint8 *) (header) + sizeof (*header)); tz_type_index = tz_transitions + timesize * time_count; tz_ttinfo = tz_type_index + time_count; @@ -557,9 +618,9 @@ init_zone_from_iana_info (GTimeZone *gtz, gtz->name = g_steal_pointer (&identifier); gtz->t_info = g_array_sized_new (FALSE, TRUE, sizeof (TransitionInfo), - type_count); + type_count + extra_type_count); gtz->transitions = g_array_sized_new (FALSE, TRUE, sizeof (Transition), - time_count); + time_count + extra_time_count); for (index = 0; index < type_count; index++) { @@ -574,15 +635,50 @@ init_zone_from_iana_info (GTimeZone *gtz, for (index = 0; index < time_count; index++) { Transition trans; - if (header->tzh_version == '2') + if (header->tzh_version >= '2') trans.time = gint64_from_be (((gint64_be*)tz_transitions)[index]); else trans.time = gint32_from_be (((gint32_be*)tz_transitions)[index]); + last_explicit_transition_time = trans.time; trans.info_index = tz_type_index[index]; g_assert (trans.info_index >= 0); g_assert ((guint) trans.info_index < gtz->t_info->len); g_array_append_val (gtz->transitions, trans); } + + if (footertz) + { + /* Append footer time types. Don't bother to coalesce + duplicates with existing time types. */ + for (index = 0; index < extra_type_count; index++) + { + TransitionInfo t_info; + TransitionInfo *footer_t_info + = &g_array_index (footertz->t_info, TransitionInfo, index); + t_info.gmt_offset = footer_t_info->gmt_offset; + t_info.is_dst = footer_t_info->is_dst; + t_info.abbrev = g_steal_pointer (&footer_t_info->abbrev); + g_array_append_val (gtz->t_info, t_info); + } + + /* Append footer transitions that follow the last explicit + transition. */ + for (index = 0; index < extra_time_count; index++) + { + Transition *footer_transition + = &g_array_index (footertz->transitions, Transition, index); + if (time_count <= 0 + || last_explicit_transition_time < footer_transition->time) + { + Transition trans; + trans.time = footer_transition->time; + trans.info_index = type_count + footer_transition->info_index; + g_array_append_val (gtz->transitions, trans); + } + } + + g_time_zone_unref (footertz); + } } #elif defined (G_OS_WIN32) @@ -590,9 +686,8 @@ init_zone_from_iana_info (GTimeZone *gtz, static void copy_windows_systemtime (SYSTEMTIME *s_time, TimeZoneDate *tzdate) { - tzdate->sec = s_time->wSecond; - tzdate->min = s_time->wMinute; - tzdate->hour = s_time->wHour; + tzdate->offset + = s_time->wHour * 3600 + s_time->wMinute * 60 + s_time->wSecond; tzdate->mon = s_time->wMonth; tzdate->year = s_time->wYear; tzdate->wday = s_time->wDayOfWeek ? s_time->wDayOfWeek : 7; @@ -979,7 +1074,7 @@ boundary_for_year (TimeZoneDate *boundary, g_date_clear (&date, 1); g_date_set_dmy (&date, buffer.mday, buffer.mon, buffer.year); return ((g_date_get_julian (&date) - unix_epoch_start) * seconds_per_day + - buffer.hour * 3600 + buffer.min * 60 + buffer.sec - offset); + buffer.offset - offset); } static void @@ -1156,7 +1251,7 @@ init_zone_from_rules (GTimeZone *gtz, * - N is 0 to 365 * * time is either h or hh[[:]mm[[[:]ss]]] - * - h[h] is 0 to 23 + * - h[h] is 0 to 24 * - mm is 00 to 59 * - ss is 00 to 59 */ @@ -1289,25 +1384,10 @@ parse_tz_boundary (const gchar *identifier, /* Time */ if (*pos == '/') - { - gint32 offset; - - if (!parse_time (++pos, &offset)) - return FALSE; - - boundary->hour = offset / 3600; - boundary->min = (offset / 60) % 60; - boundary->sec = offset % 3600; - - return TRUE; - } - + return parse_constant_offset (pos + 1, &boundary->offset, TRUE); else { - boundary->hour = 2; - boundary->min = 0; - boundary->sec = 0; - + boundary->offset = 2 * 60 * 60; return *pos == '\0'; } } @@ -1341,7 +1421,7 @@ parse_offset (gchar **pos, gint32 *target) ++(*pos); buffer = g_strndup (target_pos, *pos - target_pos); - ret = parse_constant_offset (buffer, target); + ret = parse_constant_offset (buffer, target, FALSE); g_free (buffer); return ret; @@ -1366,21 +1446,34 @@ parse_identifier_boundary (gchar **pos, TimeZoneDate *target) static gboolean set_tz_name (gchar **pos, gchar *buffer, guint size) { + gboolean quoted = **pos == '<'; gchar *name_pos = *pos; guint len; - /* Name is ASCII alpha (Is this necessarily true?) */ - while (g_ascii_isalpha (**pos)) - ++(*pos); + if (quoted) + { + name_pos++; + do + ++(*pos); + while (g_ascii_isalnum (**pos) || **pos == '-' || **pos == '+'); + if (**pos != '>') + return FALSE; + } + else + while (g_ascii_isalpha (**pos)) + ++(*pos); - /* Name should be three or more alphabetic characters */ + /* Name should be three or more characters */ + /* FIXME: Should return FALSE if the name is too long. + This should simplify code later in this function. */ if (*pos - name_pos < 3) return FALSE; - memset (buffer, 0, NAME_SIZE); + memset (buffer, 0, size); /* name_pos isn't 0-terminated, so we have to limit the length expressly */ len = *pos - name_pos > size - 1 ? size - 1 : *pos - name_pos; strncpy (buffer, name_pos, len); + *pos += quoted; return TRUE; } @@ -1483,6 +1576,36 @@ rules_from_identifier (const gchar *identifier, return create_ruleset_from_rule (rules, &tzr); } +#ifdef G_OS_UNIX +static GTimeZone * +parse_footertz (const gchar *footer, size_t footerlen) +{ + gchar *tzstring = g_strndup (footer + 1, footerlen - 2); + GTimeZone *footertz = NULL; + + /* FIXME: it might make sense to modify rules_from_identifier to + allow NULL to be passed instead of &ident, saving the strdup/free + pair. The allocation for tzstring could also be avoided by + passing a gsize identifier_len argument to rules_from_identifier + and changing the code in that function to stop assuming that + identifier is nul-terminated. */ + gchar *ident; + TimeZoneRule *rules; + guint rules_num = rules_from_identifier (tzstring, &ident, &rules); + + g_free (ident); + g_free (tzstring); + if (rules_num > 1) + { + footertz = g_slice_new0 (GTimeZone); + init_zone_from_rules (footertz, rules, rules_num, NULL); + footertz->ref_count++; + } + g_free (rules); + return footertz; +} +#endif + /* Construction {{{1 */ /** * g_time_zone_new:
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