Sign Up
Log In
Log In
or
Sign Up
Places
All Projects
Status Monitor
Collapse sidebar
isv:cpanel:dev:EA4
scl-php72
0009-Add-support-for-use-of-the-system-timezone...
Overview
Repositories
Revisions
Requests
Users
Attributes
Meta
File 0009-Add-support-for-use-of-the-system-timezone-database.patch of Package scl-php72
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Cory McIntire <cory@cpanel.net> Date: Fri, 2 Mar 2018 11:44:43 -0600 Subject: [PATCH 09/13] Add support for use of the system timezone database Source: Modified upstream Fedora patch for 7.2 --- ext/date/config0.m4 | 13 + ext/date/config0.m4.orig | 42 +++ ext/date/lib/parse_tz.c | 535 ++++++++++++++++++++++++++- ext/date/lib/parse_tz.c.orig | 678 +++++++++++++++++++++++++++++++++++ 4 files changed, 1265 insertions(+), 3 deletions(-) create mode 100644 ext/date/config0.m4.orig create mode 100644 ext/date/lib/parse_tz.c.orig diff --git a/ext/date/config0.m4 b/ext/date/config0.m4 index e4641565..00dae8b5 100644 --- a/ext/date/config0.m4 +++ b/ext/date/config0.m4 @@ -10,6 +10,19 @@ io.h dnl Check for strtoll, atoll AC_CHECK_FUNCS(strtoll atoll) +PHP_ARG_WITH(system-tzdata, for use of system timezone data, +[ --with-system-tzdata[=DIR] to specify use of system timezone data], +no, no) + +if test "$PHP_SYSTEM_TZDATA" != "no"; then + AC_DEFINE(HAVE_SYSTEM_TZDATA, 1, [Define if system timezone data is used]) + + if test "$PHP_SYSTEM_TZDATA" != "yes"; then + AC_DEFINE_UNQUOTED(HAVE_SYSTEM_TZDATA_PREFIX, "$PHP_SYSTEM_TZDATA", + [Define for location of system timezone data]) + fi +fi + PHP_DATE_CFLAGS="-I@ext_builddir@/lib -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1 -DHAVE_TIMELIB_CONFIG_H=1" timelib_sources="lib/astro.c lib/dow.c lib/parse_date.c lib/parse_tz.c lib/timelib.c lib/tm2unixtime.c lib/unixtime2tm.c lib/parse_iso_intervals.c lib/interval.c" diff --git a/ext/date/config0.m4.orig b/ext/date/config0.m4.orig new file mode 100644 index 00000000..e4641565 --- /dev/null +++ b/ext/date/config0.m4.orig @@ -0,0 +1,42 @@ +dnl $Id$ +dnl config.m4 for date extension + +dnl Check for headers needed by timelib +AC_CHECK_HEADERS([ \ +strings.h \ +io.h +]) + +dnl Check for strtoll, atoll +AC_CHECK_FUNCS(strtoll atoll) + +PHP_DATE_CFLAGS="-I@ext_builddir@/lib -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1 -DHAVE_TIMELIB_CONFIG_H=1" +timelib_sources="lib/astro.c lib/dow.c lib/parse_date.c lib/parse_tz.c + lib/timelib.c lib/tm2unixtime.c lib/unixtime2tm.c lib/parse_iso_intervals.c lib/interval.c" + +PHP_NEW_EXTENSION(date, php_date.c $timelib_sources, no,, $PHP_DATE_CFLAGS) + +PHP_ADD_BUILD_DIR([$ext_builddir/lib], 1) +PHP_ADD_INCLUDE([$ext_builddir/lib]) +PHP_ADD_INCLUDE([$ext_srcdir/lib]) + +PHP_INSTALL_HEADERS([ext/date], [php_date.h lib/timelib.h lib/timelib_config.h]) +AC_DEFINE([HAVE_TIMELIB_CONFIG_H], [1], [Have timelib_config.h]) + +cat > $ext_builddir/lib/timelib_config.h <<EOF +#ifdef PHP_WIN32 +# include "config.w32.h" +#else +# include <php_config.h> +#endif +#include <php_stdint.h> +#define TIMELIB_OMIT_STDINT 1 + +#include "zend.h" + +#define timelib_malloc emalloc +#define timelib_realloc erealloc +#define timelib_calloc ecalloc +#define timelib_strdup estrdup +#define timelib_free efree +EOF diff --git a/ext/date/lib/parse_tz.c b/ext/date/lib/parse_tz.c index 960e5288..79c013fb 100644 --- a/ext/date/lib/parse_tz.c +++ b/ext/date/lib/parse_tz.c @@ -25,8 +25,21 @@ #include "timelib.h" #include "timelib_private.h" +#ifdef HAVE_SYSTEM_TZDATA +#include <sys/mman.h> +#include <sys/stat.h> +#include <limits.h> +#include <fcntl.h> +#include <unistd.h> + +#include "php_scandir.h" + +#else #define TIMELIB_SUPPORTS_V2DATA #include "timezonedb.h" +#endif + +#include <ctype.h> #if (defined(__APPLE__) || defined(__APPLE_CC__)) && (defined(__BIG_ENDIAN__) || defined(__LITTLE_ENDIAN__)) # if defined(__LITTLE_ENDIAN__) @@ -67,6 +80,11 @@ static int read_php_preamble(const unsigned char **tzf, timelib_tzinfo *tz) { uint32_t version; + if (memcmp(*tzf, "TZif", 4) == 0) { + *tzf += 20; + return 0; + } + /* read ID */ version = (*tzf)[3] - '0'; *tzf += 4; @@ -374,7 +392,429 @@ void timelib_dump_tzinfo(timelib_tzinfo *tz) } } -static int seek_to_tz_position(const unsigned char **tzf, char *timezone, const timelib_tzdb *tzdb) +#ifdef HAVE_SYSTEM_TZDATA + +#ifdef HAVE_SYSTEM_TZDATA_PREFIX +#define ZONEINFO_PREFIX HAVE_SYSTEM_TZDATA_PREFIX +#else +#define ZONEINFO_PREFIX "/usr/share/zoneinfo" +#endif + +/* System timezone database pointer. */ +static const timelib_tzdb *timezonedb_system; + +/* Hash table entry for the cache of the zone.tab mapping table. */ +struct location_info { + char code[2]; + double latitude, longitude; + char name[64]; + char *comment; + struct location_info *next; +}; + +/* Cache of zone.tab. */ +static struct location_info **system_location_table; + +/* Size of the zone.tab hash table; a random-ish prime big enough to + * prevent too many collisions. */ +#define LOCINFO_HASH_SIZE (1021) + +/* Compute a case insensitive hash of str */ +static uint32_t tz_hash(const char *str) +{ + const unsigned char *p = (const unsigned char *)str; + uint32_t hash = 5381; + int c; + + while ((c = tolower(*p++)) != '\0') { + hash = (hash << 5) ^ hash ^ c; + } + + return hash % LOCINFO_HASH_SIZE; +} + +/* Parse an ISO-6709 date as used in zone.tab. Returns end of the + * parsed string on success, or NULL on parse error. On success, + * writes the parsed number to *result. */ +static char *parse_iso6709(char *p, double *result) +{ + double v, sign; + char *pend; + size_t len; + + if (*p == '+') + sign = 1.0; + else if (*p == '-') + sign = -1.0; + else + return NULL; + + p++; + for (pend = p; *pend >= '0' && *pend <= '9'; pend++) + ;; + + /* Annoying encoding used by zone.tab has no decimal point, so use + * the length to determine the format: + * + * 4 = DDMM + * 5 = DDDMM + * 6 = DDMMSS + * 7 = DDDMMSS + */ + len = pend - p; + if (len < 4 || len > 7) { + return NULL; + } + + /* p => [D]DD */ + v = (p[0] - '0') * 10.0 + (p[1] - '0'); + p += 2; + if (len == 5 || len == 7) + v = v * 10.0 + (*p++ - '0'); + /* p => MM[SS] */ + v += (10.0 * (p[0] - '0') + + p[1] - '0') / 60.0; + p += 2; + /* p => [SS] */ + if (len > 5) { + v += (10.0 * (p[0] - '0') + + p[1] - '0') / 3600.0; + p += 2; + } + + /* Round to five decimal place, not because it's a good idea, + * but, because the builtin data uses rounded data, so, match + * that. */ + *result = trunc(v * sign * 100000.0) / 100000.0; + + return p; +} + +/* This function parses the zone.tab file to build up the mapping of + * timezone to country code and geographic location, and returns a + * hash table. The hash table is indexed by the function: + * + * tz_hash(timezone-name) + */ +static struct location_info **create_location_table(void) +{ + struct location_info **li, *i; + char zone_tab[PATH_MAX]; + char line[512]; + FILE *fp; + + strncpy(zone_tab, ZONEINFO_PREFIX "/zone.tab", sizeof zone_tab); + + fp = fopen(zone_tab, "r"); + if (!fp) { + return NULL; + } + + li = calloc(LOCINFO_HASH_SIZE, sizeof *li); + + while (fgets(line, sizeof line, fp)) { + char *p = line, *code, *name, *comment; + uint32_t hash; + double latitude, longitude; + + while (isspace(*p)) + p++; + + if (*p == '#' || *p == '\0' || *p == '\n') + continue; + + if (!isalpha(p[0]) || !isalpha(p[1]) || p[2] != '\t') + continue; + + /* code => AA */ + code = p; + p[2] = 0; + p += 3; + + /* coords => [+-][D]DDMM[SS][+-][D]DDMM[SS] */ + p = parse_iso6709(p, &latitude); + if (!p) { + continue; + } + p = parse_iso6709(p, &longitude); + if (!p) { + continue; + } + + if (!p || *p != '\t') { + continue; + } + + /* name = string */ + name = ++p; + while (*p != '\t' && *p && *p != '\n') + p++; + + *p++ = '\0'; + + /* comment = string */ + comment = p; + while (*p != '\t' && *p && *p != '\n') + p++; + + if (*p == '\n' || *p == '\t') + *p = '\0'; + + hash = tz_hash(name); + i = malloc(sizeof *i); + memcpy(i->code, code, 2); + strncpy(i->name, name, sizeof i->name); + i->comment = strdup(comment); + i->longitude = longitude; + i->latitude = latitude; + i->next = li[hash]; + li[hash] = i; + /* printf("%s [%u, %f, %f]\n", name, hash, latitude, longitude); */ + } + + fclose(fp); + + return li; +} + +/* Return location info from hash table, using given timezone name. + * Returns NULL if the name could not be found. */ +const struct location_info *find_zone_info(struct location_info **li, + const char *name) +{ + uint32_t hash = tz_hash(name); + const struct location_info *l; + + if (!li) { + return NULL; + } + + for (l = li[hash]; l; l = l->next) { + if (timelib_strcasecmp(l->name, name) == 0) + return l; + } + + return NULL; +} + +/* Filter out some non-tzdata files and the posix/right databases, if + * present. */ +static int index_filter(const struct dirent *ent) +{ + return strcmp(ent->d_name, ".") != 0 + && strcmp(ent->d_name, "..") != 0 + && strcmp(ent->d_name, "posix") != 0 + && strcmp(ent->d_name, "posixrules") != 0 + && strcmp(ent->d_name, "right") != 0 + && strstr(ent->d_name, ".list") == NULL + && strstr(ent->d_name, ".tab") == NULL; +} + +static int sysdbcmp(const void *first, const void *second) +{ + const timelib_tzdb_index_entry *alpha = first, *beta = second; + + return timelib_strcasecmp(alpha->id, beta->id); +} + + +/* Create the zone identifier index by trawling the filesystem. */ +static void create_zone_index(timelib_tzdb *db) +{ + size_t dirstack_size, dirstack_top; + size_t index_size, index_next; + timelib_tzdb_index_entry *db_index; + char **dirstack; + + /* LIFO stack to hold directory entries to scan; each slot is a + * directory name relative to the zoneinfo prefix. */ + dirstack_size = 32; + dirstack = malloc(dirstack_size * sizeof *dirstack); + dirstack_top = 1; + dirstack[0] = strdup(""); + + /* Index array. */ + index_size = 64; + db_index = malloc(index_size * sizeof *db_index); + index_next = 0; + + do { + struct dirent **ents; + char name[PATH_MAX], *top; + int count; + + /* Pop the top stack entry, and iterate through its contents. */ + top = dirstack[--dirstack_top]; + snprintf(name, sizeof name, ZONEINFO_PREFIX "/%s", top); + + count = php_scandir(name, &ents, index_filter, php_alphasort); + + while (count > 0) { + struct stat st; + const char *leaf = ents[count - 1]->d_name; + + snprintf(name, sizeof name, ZONEINFO_PREFIX "/%s/%s", + top, leaf); + + if (strlen(name) && stat(name, &st) == 0) { + /* Name, relative to the zoneinfo prefix. */ + const char *root = top; + + if (root[0] == '/') root++; + + snprintf(name, sizeof name, "%s%s%s", root, + *root ? "/": "", leaf); + + if (S_ISDIR(st.st_mode)) { + if (dirstack_top == dirstack_size) { + dirstack_size *= 2; + dirstack = realloc(dirstack, + dirstack_size * sizeof *dirstack); + } + dirstack[dirstack_top++] = strdup(name); + } + else { + if (index_next == index_size) { + index_size *= 2; + db_index = realloc(db_index, + index_size * sizeof *db_index); + } + + db_index[index_next++].id = strdup(name); + } + } + + free(ents[--count]); + } + + if (count != -1) free(ents); + free(top); + } while (dirstack_top); + + qsort(db_index, index_next, sizeof *db_index, sysdbcmp); + + db->index = db_index; + db->index_size = index_next; + + free(dirstack); +} + +#define FAKE_HEADER "1234\0??\1??" +#define FAKE_UTC_POS (7 - 4) + +/* Create a fake data segment for database 'sysdb'. */ +static void fake_data_segment(timelib_tzdb *sysdb, + struct location_info **info) +{ + size_t n; + char *data, *p; + + data = malloc(3 * sysdb->index_size + 7); + + p = mempcpy(data, FAKE_HEADER, sizeof(FAKE_HEADER) - 1); + + for (n = 0; n < sysdb->index_size; n++) { + const struct location_info *li; + timelib_tzdb_index_entry *ent; + + ent = (timelib_tzdb_index_entry *)&sysdb->index[n]; + + /* Lookup the timezone name in the hash table. */ + if (strcmp(ent->id, "UTC") == 0) { + ent->pos = FAKE_UTC_POS; + continue; + } + + li = find_zone_info(info, ent->id); + if (li) { + /* If found, append the BC byte and the + * country code; set the position for this + * section of timezone data. */ + ent->pos = (p - data) - 4; + *p++ = '\1'; + *p++ = li->code[0]; + *p++ = li->code[1]; + } + else { + /* If not found, the timezone data can + * point at the header. */ + ent->pos = 0; + } + } + + sysdb->data = (unsigned char *)data; +} + +/* Returns true if the passed-in stat structure describes a + * probably-valid timezone file. */ +static int is_valid_tzfile(const struct stat *st, int fd) +{ + if (fd) { + char buf[20]; + if (read(fd, buf, 20)!=20) { + return 0; + } + lseek(fd, SEEK_SET, 0); + if (memcmp(buf, "TZif", 4)) { + return 0; + } + } + return S_ISREG(st->st_mode) && st->st_size > 20; +} + +/* To allow timezone names to be used case-insensitively, find the + * canonical name for this timezone, if possible. */ +static const char *canonical_tzname(const char *timezone) +{ + if (timezonedb_system) { + timelib_tzdb_index_entry *ent, lookup; + + lookup.id = (char *)timezone; + + ent = bsearch(&lookup, timezonedb_system->index, + timezonedb_system->index_size, sizeof lookup, + sysdbcmp); + if (ent) { + return ent->id; + } + } + + return timezone; +} + +/* Return the mmap()ed tzfile if found, else NULL. On success, the + * length of the mapped data is placed in *length. */ +static char *map_tzfile(const char *timezone, size_t *length) +{ + char fname[PATH_MAX]; + struct stat st; + char *p; + int fd; + + if (timezone[0] == '\0' || strstr(timezone, "..") != NULL) { + return NULL; + } + + snprintf(fname, sizeof fname, ZONEINFO_PREFIX "/%s", canonical_tzname(timezone)); + + fd = open(fname, O_RDONLY); + if (fd == -1) { + return NULL; + } else if (fstat(fd, &st) != 0 || !is_valid_tzfile(&st, fd)) { + close(fd); + return NULL; + } + + *length = st.st_size; + p = mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, fd, 0); + close(fd); + + return p != MAP_FAILED ? p : NULL; +} + +#endif + +static int inmem_seek_to_tz_position(const unsigned char **tzf, char *timezone, const timelib_tzdb *tzdb) { int left = 0, right = tzdb->index_size - 1; @@ -400,9 +840,48 @@ static int seek_to_tz_position(const unsigned char **tzf, char *timezone, const return 0; } +static int seek_to_tz_position(const unsigned char **tzf, char *timezone, + char **map, size_t *maplen, + const timelib_tzdb *tzdb) +{ +#ifdef HAVE_SYSTEM_TZDATA + if (tzdb == timezonedb_system) { + char *orig; + + orig = map_tzfile(timezone, maplen); + if (orig == NULL) { + return 0; + } + + (*tzf) = (unsigned char *)orig; + *map = orig; + return 1; + } + else +#endif + { + return inmem_seek_to_tz_position(tzf, timezone, tzdb); + } +} + const timelib_tzdb *timelib_builtin_db(void) { +#ifdef HAVE_SYSTEM_TZDATA + if (timezonedb_system == NULL) { + timelib_tzdb *tmp = malloc(sizeof *tmp); + + tmp->version = "0.system"; + tmp->data = NULL; + create_zone_index(tmp); + system_location_table = create_location_table(); + fake_data_segment(tmp, system_location_table); + timezonedb_system = tmp; + } + + return timezonedb_system; +#else return &timezonedb_builtin; +#endif } const timelib_tzdb_index_entry *timelib_timezone_identifiers_list(const timelib_tzdb *tzdb, int *count) @@ -414,7 +893,30 @@ const timelib_tzdb_index_entry *timelib_timezone_identifiers_list(const timelib_ int timelib_timezone_id_is_valid(char *timezone, const timelib_tzdb *tzdb) { const unsigned char *tzf; - return (seek_to_tz_position(&tzf, timezone, tzdb)); + +#ifdef HAVE_SYSTEM_TZDATA + if (tzdb == timezonedb_system) { + char fname[PATH_MAX]; + struct stat st; + + if (timezone[0] == '\0' || strstr(timezone, "..") != NULL) { + return 0; + } + + if (system_location_table) { + if (find_zone_info(system_location_table, timezone) != NULL) { + /* found in cache */ + return 1; + } + } + + snprintf(fname, sizeof fname, ZONEINFO_PREFIX "/%s", canonical_tzname(timezone)); + + return stat(fname, &st) == 0 && is_valid_tzfile(&st, 0); + } +#endif + + return (inmem_seek_to_tz_position(&tzf, timezone, tzdb)); } static int skip_64bit_preamble(const unsigned char **tzf, timelib_tzinfo *tz) @@ -456,12 +958,14 @@ static timelib_tzinfo* timelib_tzinfo_ctor(char *name) timelib_tzinfo *timelib_parse_tzfile(char *timezone, const timelib_tzdb *tzdb, int *error_code) { const unsigned char *tzf; + char *memmap = NULL; + size_t maplen; timelib_tzinfo *tmp; int version; int transitions_result, types_result; unsigned int type; /* TIMELIB_TZINFO_PHP or TIMELIB_TZINFO_ZONEINFO */ - if (seek_to_tz_position(&tzf, timezone, tzdb)) { + if (seek_to_tz_position(&tzf, timezone, &memmap, &maplen, tzdb)) { tmp = timelib_tzinfo_ctor(timezone); version = read_preamble(&tzf, tmp, &type); @@ -496,11 +1000,36 @@ timelib_tzinfo *timelib_parse_tzfile(char *timezone, const timelib_tzdb *tzdb, i skip_posix_string(&tzf, tmp); } +#ifdef HAVE_SYSTEM_TZDATA + if (memmap) { + const struct location_info *li; + + /* TZif-style - grok the location info from the system database, + * if possible. */ + + if ((li = find_zone_info(system_location_table, timezone)) != NULL) { + tmp->location.comments = timelib_strdup(li->comment); + strncpy(tmp->location.country_code, li->code, 2); + tmp->location.longitude = li->longitude; + tmp->location.latitude = li->latitude; + tmp->bc = 1; + } + else { + set_default_location_and_comments(&tzf, tmp); + } + + /* Now done with the mmap segment - discard it. */ + munmap(memmap, maplen); + } else { +#endif if (type == TIMELIB_TZINFO_PHP) { read_location(&tzf, tmp); } else { set_default_location_and_comments(&tzf, tmp); } +#ifdef HAVE_SYSTEM_TZDATA + } +#endif } else { *error_code = TIMELIB_ERROR_NO_SUCH_TIMEZONE; tmp = NULL; diff --git a/ext/date/lib/parse_tz.c.orig b/ext/date/lib/parse_tz.c.orig new file mode 100644 index 00000000..960e5288 --- /dev/null +++ b/ext/date/lib/parse_tz.c.orig @@ -0,0 +1,678 @@ +/* + * The MIT License (MIT) + * + * Copyright (c) 2015 Derick Rethans + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +#include "timelib.h" +#include "timelib_private.h" + +#define TIMELIB_SUPPORTS_V2DATA +#include "timezonedb.h" + +#if (defined(__APPLE__) || defined(__APPLE_CC__)) && (defined(__BIG_ENDIAN__) || defined(__LITTLE_ENDIAN__)) +# if defined(__LITTLE_ENDIAN__) +# undef WORDS_BIGENDIAN +# else +# if defined(__BIG_ENDIAN__) +# define WORDS_BIGENDIAN +# endif +# endif +#endif + +#if defined(__s390__) +# if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ +# define WORDS_BIGENDIAN +# else +# undef WORDS_BIGENDIAN +# endif +#endif + +#ifdef WORDS_BIGENDIAN +static inline uint32_t timelib_conv_int_unsigned(uint32_t value) +{ + return value; +} +#else +static inline uint32_t timelib_conv_int_unsigned(uint32_t value) +{ + return ((value & 0x000000ff) << 24) + + ((value & 0x0000ff00) << 8) + + ((value & 0x00ff0000) >> 8) + + ((value & 0xff000000) >> 24); +} +#endif + +#define timelib_conv_int_signed(value) ((int32_t) timelib_conv_int_unsigned((int32_t) value)) + +static int read_php_preamble(const unsigned char **tzf, timelib_tzinfo *tz) +{ + uint32_t version; + + /* read ID */ + version = (*tzf)[3] - '0'; + *tzf += 4; + + /* read BC flag */ + tz->bc = (**tzf == '\1'); + *tzf += 1; + + /* read country code */ + memcpy(tz->location.country_code, *tzf, 2); + tz->location.country_code[2] = '\0'; + *tzf += 2; + + /* skip rest of preamble */ + *tzf += 13; + + return version; +} + +static int read_tzif_preamble(const unsigned char **tzf, timelib_tzinfo *tz) +{ + uint32_t version; + + /* read ID */ + switch ((*tzf)[4]) { + case '\0': + version = 0; + break; + case '2': + version = 2; + break; + case '3': + version = 3; + break; + default: + return -1; + } + *tzf += 5; + + /* set BC flag and country code to default */ + tz->bc = 0; + tz->location.country_code[0] = '?'; + tz->location.country_code[1] = '?'; + tz->location.country_code[2] = '\0'; + + /* skip rest of preamble */ + *tzf += 15; + + return version; +} + +static int read_preamble(const unsigned char **tzf, timelib_tzinfo *tz, unsigned int *type) +{ + /* read marker (TZif) or (PHP) */ + if (memcmp(*tzf, "PHP", 3) == 0) { + *type = TIMELIB_TZINFO_PHP; + return read_php_preamble(tzf, tz); + } else if (memcmp(*tzf, "TZif", 4) == 0) { + *type = TIMELIB_TZINFO_ZONEINFO; + return read_tzif_preamble(tzf, tz); + } else { + return -1; + } +} + +static void read_header(const unsigned char **tzf, timelib_tzinfo *tz) +{ + uint32_t buffer[6]; + + memcpy(&buffer, *tzf, sizeof(buffer)); + tz->bit32.ttisgmtcnt = timelib_conv_int_unsigned(buffer[0]); + tz->bit32.ttisstdcnt = timelib_conv_int_unsigned(buffer[1]); + tz->bit32.leapcnt = timelib_conv_int_unsigned(buffer[2]); + tz->bit32.timecnt = timelib_conv_int_unsigned(buffer[3]); + tz->bit32.typecnt = timelib_conv_int_unsigned(buffer[4]); + tz->bit32.charcnt = timelib_conv_int_unsigned(buffer[5]); + *tzf += sizeof(buffer); +} + +static void skip_64bit_transitions(const unsigned char **tzf, timelib_tzinfo *tz) +{ + if (tz->bit64.timecnt) { + *tzf += (sizeof(int64_t) * tz->bit64.timecnt); + *tzf += (sizeof(unsigned char) * tz->bit64.timecnt); + } +} + +static int read_transitions(const unsigned char **tzf, timelib_tzinfo *tz) +{ + int32_t *buffer = NULL; + uint32_t i; + unsigned char *cbuffer = NULL; + + if (tz->bit32.timecnt) { + buffer = (int32_t*) timelib_malloc(tz->bit32.timecnt * sizeof(int32_t)); + if (!buffer) { + return TIMELIB_ERROR_CANNOT_ALLOCATE; + } + memcpy(buffer, *tzf, sizeof(int32_t) * tz->bit32.timecnt); + *tzf += (sizeof(int32_t) * tz->bit32.timecnt); + for (i = 0; i < tz->bit32.timecnt; i++) { + buffer[i] = timelib_conv_int_signed(buffer[i]); + /* Sanity check to see whether TS is just increasing */ + if (i > 0 && !(buffer[i] > buffer[i - 1])) { + return TIMELIB_ERROR_CORRUPT_TRANSITIONS_DONT_INCREASE; + } + } + + cbuffer = (unsigned char*) timelib_malloc(tz->bit32.timecnt * sizeof(unsigned char)); + if (!cbuffer) { + timelib_free(buffer); + return TIMELIB_ERROR_CANNOT_ALLOCATE; + } + memcpy(cbuffer, *tzf, sizeof(unsigned char) * tz->bit32.timecnt); + *tzf += sizeof(unsigned char) * tz->bit32.timecnt; + } + + tz->trans = buffer; + tz->trans_idx = cbuffer; + + return 0; +} + +static void skip_64bit_types(const unsigned char **tzf, timelib_tzinfo *tz) +{ + *tzf += sizeof(unsigned char) * 6 * tz->bit64.typecnt; + *tzf += sizeof(char) * tz->bit64.charcnt; + if (tz->bit64.leapcnt) { + *tzf += sizeof(int64_t) * tz->bit64.leapcnt * 2; + } + if (tz->bit64.ttisstdcnt) { + *tzf += sizeof(unsigned char) * tz->bit64.ttisstdcnt; + } + if (tz->bit64.ttisgmtcnt) { + *tzf += sizeof(unsigned char) * tz->bit64.ttisgmtcnt; + } +} + +static int read_types(const unsigned char **tzf, timelib_tzinfo *tz) +{ + unsigned char *buffer; + int32_t *leap_buffer; + unsigned int i, j; + + buffer = (unsigned char*) timelib_malloc(tz->bit32.typecnt * sizeof(unsigned char) * 6); + if (!buffer) { + return TIMELIB_ERROR_CANNOT_ALLOCATE; + } + memcpy(buffer, *tzf, sizeof(unsigned char) * 6 * tz->bit32.typecnt); + *tzf += sizeof(unsigned char) * 6 * tz->bit32.typecnt; + + tz->type = (ttinfo*) timelib_malloc(tz->bit32.typecnt * sizeof(ttinfo)); + if (!tz->type) { + timelib_free(buffer); + return TIMELIB_ERROR_CANNOT_ALLOCATE; + } + + for (i = 0; i < tz->bit32.typecnt; i++) { + j = i * 6; + tz->type[i].offset = 0; + tz->type[i].offset += (int32_t) (((uint32_t) buffer[j]) << 24) + (buffer[j + 1] << 16) + (buffer[j + 2] << 8) + tz->type[i].offset + buffer[j + 3]; + tz->type[i].isdst = buffer[j + 4]; + tz->type[i].abbr_idx = buffer[j + 5]; + } + timelib_free(buffer); + + tz->timezone_abbr = (char*) timelib_malloc(tz->bit32.charcnt); + if (!tz->timezone_abbr) { + return TIMELIB_ERROR_CORRUPT_NO_ABBREVIATION; + } + memcpy(tz->timezone_abbr, *tzf, sizeof(char) * tz->bit32.charcnt); + *tzf += sizeof(char) * tz->bit32.charcnt; + + if (tz->bit32.leapcnt) { + leap_buffer = (int32_t *) timelib_malloc(tz->bit32.leapcnt * 2 * sizeof(int32_t)); + if (!leap_buffer) { + return TIMELIB_ERROR_CANNOT_ALLOCATE; + } + memcpy(leap_buffer, *tzf, sizeof(int32_t) * tz->bit32.leapcnt * 2); + *tzf += sizeof(int32_t) * tz->bit32.leapcnt * 2; + + tz->leap_times = (tlinfo*) timelib_malloc(tz->bit32.leapcnt * sizeof(tlinfo)); + if (!tz->leap_times) { + timelib_free(leap_buffer); + return TIMELIB_ERROR_CANNOT_ALLOCATE; + } + for (i = 0; i < tz->bit32.leapcnt; i++) { + tz->leap_times[i].trans = timelib_conv_int_signed(leap_buffer[i * 2]); + tz->leap_times[i].offset = timelib_conv_int_signed(leap_buffer[i * 2 + 1]); + } + timelib_free(leap_buffer); + } + + if (tz->bit32.ttisstdcnt) { + buffer = (unsigned char*) timelib_malloc(tz->bit32.ttisstdcnt * sizeof(unsigned char)); + if (!buffer) { + return TIMELIB_ERROR_CANNOT_ALLOCATE; + } + memcpy(buffer, *tzf, sizeof(unsigned char) * tz->bit32.ttisstdcnt); + *tzf += sizeof(unsigned char) * tz->bit32.ttisstdcnt; + + for (i = 0; i < tz->bit32.ttisstdcnt; i++) { + tz->type[i].isstdcnt = buffer[i]; + } + timelib_free(buffer); + } + + if (tz->bit32.ttisgmtcnt) { + buffer = (unsigned char*) timelib_malloc(tz->bit32.ttisgmtcnt * sizeof(unsigned char)); + if (!buffer) { + return TIMELIB_ERROR_CANNOT_ALLOCATE; + } + memcpy(buffer, *tzf, sizeof(unsigned char) * tz->bit32.ttisgmtcnt); + *tzf += sizeof(unsigned char) * tz->bit32.ttisgmtcnt; + + for (i = 0; i < tz->bit32.ttisgmtcnt; i++) { + tz->type[i].isgmtcnt = buffer[i]; + } + timelib_free(buffer); + } + + return 0; +} + +static void skip_posix_string(const unsigned char **tzf, timelib_tzinfo *tz) +{ + int n_count = 0; + + do { + if (*tzf[0] == '\n') { + n_count++; + } + (*tzf)++; + } while (n_count < 2); +} + +static void read_location(const unsigned char **tzf, timelib_tzinfo *tz) +{ + uint32_t buffer[3]; + uint32_t comments_len; + + memcpy(&buffer, *tzf, sizeof(buffer)); + tz->location.latitude = timelib_conv_int_unsigned(buffer[0]); + tz->location.latitude = (tz->location.latitude / 100000) - 90; + tz->location.longitude = timelib_conv_int_unsigned(buffer[1]); + tz->location.longitude = (tz->location.longitude / 100000) - 180; + comments_len = timelib_conv_int_unsigned(buffer[2]); + *tzf += sizeof(buffer); + + tz->location.comments = timelib_malloc(comments_len + 1); + memcpy(tz->location.comments, *tzf, comments_len); + tz->location.comments[comments_len] = '\0'; + *tzf += comments_len; +} + +static void set_default_location_and_comments(const unsigned char **tzf, timelib_tzinfo *tz) +{ + tz->location.latitude = 0; + tz->location.longitude = 0; + tz->location.comments = timelib_malloc(2); + tz->location.comments[0] = '?'; + tz->location.comments[1] = '\0'; +} + +void timelib_dump_tzinfo(timelib_tzinfo *tz) +{ + uint32_t i; + + printf("Country Code: %s\n", tz->location.country_code); + printf("Geo Location: %f,%f\n", tz->location.latitude, tz->location.longitude); + printf("Comments:\n%s\n", tz->location.comments); + printf("BC: %s\n", tz->bc ? "" : "yes"); + printf("UTC/Local count: " TIMELIB_ULONG_FMT "\n", (timelib_ulong) tz->bit32.ttisgmtcnt); + printf("Std/Wall count: " TIMELIB_ULONG_FMT "\n", (timelib_ulong) tz->bit32.ttisstdcnt); + printf("Leap.sec. count: " TIMELIB_ULONG_FMT "\n", (timelib_ulong) tz->bit32.leapcnt); + printf("Trans. count: " TIMELIB_ULONG_FMT "\n", (timelib_ulong) tz->bit32.timecnt); + printf("Local types count: " TIMELIB_ULONG_FMT "\n", (timelib_ulong) tz->bit32.typecnt); + printf("Zone Abbr. count: " TIMELIB_ULONG_FMT "\n", (timelib_ulong) tz->bit32.charcnt); + + printf ("%8s (%12s) = %3d [%5ld %1d %3d '%s' (%d,%d)]\n", + "", "", 0, + (long int) tz->type[0].offset, + tz->type[0].isdst, + tz->type[0].abbr_idx, + &tz->timezone_abbr[tz->type[0].abbr_idx], + tz->type[0].isstdcnt, + tz->type[0].isgmtcnt + ); + for (i = 0; i < tz->bit32.timecnt; i++) { + printf ("%08X (%12d) = %3d [%5ld %1d %3d '%s' (%d,%d)]\n", + tz->trans[i], tz->trans[i], tz->trans_idx[i], + (long int) tz->type[tz->trans_idx[i]].offset, + tz->type[tz->trans_idx[i]].isdst, + tz->type[tz->trans_idx[i]].abbr_idx, + &tz->timezone_abbr[tz->type[tz->trans_idx[i]].abbr_idx], + tz->type[tz->trans_idx[i]].isstdcnt, + tz->type[tz->trans_idx[i]].isgmtcnt + ); + } + for (i = 0; i < tz->bit32.leapcnt; i++) { + printf ("%08X (%12ld) = %d\n", + tz->leap_times[i].trans, + (long) tz->leap_times[i].trans, + tz->leap_times[i].offset); + } +} + +static int seek_to_tz_position(const unsigned char **tzf, char *timezone, const timelib_tzdb *tzdb) +{ + int left = 0, right = tzdb->index_size - 1; + + if (tzdb->index_size == 0) { + return 0; + } + + do { + int mid = ((unsigned)left + right) >> 1; + int cmp = timelib_strcasecmp(timezone, tzdb->index[mid].id); + + if (cmp < 0) { + right = mid - 1; + } else if (cmp > 0) { + left = mid + 1; + } else { /* (cmp == 0) */ + (*tzf) = &(tzdb->data[tzdb->index[mid].pos]); + return 1; + } + + } while (left <= right); + + return 0; +} + +const timelib_tzdb *timelib_builtin_db(void) +{ + return &timezonedb_builtin; +} + +const timelib_tzdb_index_entry *timelib_timezone_identifiers_list(const timelib_tzdb *tzdb, int *count) +{ + *count = tzdb->index_size; + return tzdb->index; +} + +int timelib_timezone_id_is_valid(char *timezone, const timelib_tzdb *tzdb) +{ + const unsigned char *tzf; + return (seek_to_tz_position(&tzf, timezone, tzdb)); +} + +static int skip_64bit_preamble(const unsigned char **tzf, timelib_tzinfo *tz) +{ + if (memcmp(*tzf, "TZif2", 5) == 0) { + *tzf += 20; + return 1; + } else if (memcmp(*tzf, "TZif3", 5) == 0) { + *tzf += 20; + return 1; + } else { + return 0; + } +} + +static void read_64bit_header(const unsigned char **tzf, timelib_tzinfo *tz) +{ + uint32_t buffer[6]; + + memcpy(&buffer, *tzf, sizeof(buffer)); + tz->bit64.ttisgmtcnt = timelib_conv_int_unsigned(buffer[0]); + tz->bit64.ttisstdcnt = timelib_conv_int_unsigned(buffer[1]); + tz->bit64.leapcnt = timelib_conv_int_unsigned(buffer[2]); + tz->bit64.timecnt = timelib_conv_int_unsigned(buffer[3]); + tz->bit64.typecnt = timelib_conv_int_unsigned(buffer[4]); + tz->bit64.charcnt = timelib_conv_int_unsigned(buffer[5]); + *tzf += sizeof(buffer); +} + +static timelib_tzinfo* timelib_tzinfo_ctor(char *name) +{ + timelib_tzinfo *t; + t = timelib_calloc(1, sizeof(timelib_tzinfo)); + t->name = timelib_strdup(name); + + return t; +} + +timelib_tzinfo *timelib_parse_tzfile(char *timezone, const timelib_tzdb *tzdb, int *error_code) +{ + const unsigned char *tzf; + timelib_tzinfo *tmp; + int version; + int transitions_result, types_result; + unsigned int type; /* TIMELIB_TZINFO_PHP or TIMELIB_TZINFO_ZONEINFO */ + + if (seek_to_tz_position(&tzf, timezone, tzdb)) { + tmp = timelib_tzinfo_ctor(timezone); + + version = read_preamble(&tzf, tmp, &type); + if (version == -1) { + *error_code = TIMELIB_ERROR_UNSUPPORTED_VERSION; + timelib_tzinfo_dtor(tmp); + return NULL; + } +//printf("- timezone: %s, version: %0d\n", timezone, version); + + read_header(&tzf, tmp); + if ((transitions_result = read_transitions(&tzf, tmp)) != 0) { + /* Corrupt file as transitions do not increase */ + *error_code = transitions_result; + timelib_tzinfo_dtor(tmp); + return NULL; + } + if ((types_result = read_types(&tzf, tmp)) != 0) { + *error_code = types_result; + timelib_tzinfo_dtor(tmp); + return NULL; + } + if (version == 2 || version == 3) { + if (!skip_64bit_preamble(&tzf, tmp)) { + /* 64 bit preamble is not in place */ + *error_code = TIMELIB_ERROR_CORRUPT_NO_64BIT_PREAMBLE; + return NULL; + } + read_64bit_header(&tzf, tmp); + skip_64bit_transitions(&tzf, tmp); + skip_64bit_types(&tzf, tmp); + skip_posix_string(&tzf, tmp); + } + + if (type == TIMELIB_TZINFO_PHP) { + read_location(&tzf, tmp); + } else { + set_default_location_and_comments(&tzf, tmp); + } + } else { + *error_code = TIMELIB_ERROR_NO_SUCH_TIMEZONE; + tmp = NULL; + } + + return tmp; +} + +void timelib_tzinfo_dtor(timelib_tzinfo *tz) +{ + TIMELIB_TIME_FREE(tz->name); + TIMELIB_TIME_FREE(tz->trans); + TIMELIB_TIME_FREE(tz->trans_idx); + TIMELIB_TIME_FREE(tz->type); + TIMELIB_TIME_FREE(tz->timezone_abbr); + TIMELIB_TIME_FREE(tz->leap_times); + TIMELIB_TIME_FREE(tz->location.comments); + TIMELIB_TIME_FREE(tz); + tz = NULL; +} + +timelib_tzinfo *timelib_tzinfo_clone(timelib_tzinfo *tz) +{ + timelib_tzinfo *tmp = timelib_tzinfo_ctor(tz->name); + tmp->bit32.ttisgmtcnt = tz->bit32.ttisgmtcnt; + tmp->bit32.ttisstdcnt = tz->bit32.ttisstdcnt; + tmp->bit32.leapcnt = tz->bit32.leapcnt; + tmp->bit32.timecnt = tz->bit32.timecnt; + tmp->bit32.typecnt = tz->bit32.typecnt; + tmp->bit32.charcnt = tz->bit32.charcnt; + + if (tz->bit32.timecnt) { + tmp->trans = (int32_t *) timelib_malloc(tz->bit32.timecnt * sizeof(int32_t)); + tmp->trans_idx = (unsigned char*) timelib_malloc(tz->bit32.timecnt * sizeof(unsigned char)); + memcpy(tmp->trans, tz->trans, tz->bit32.timecnt * sizeof(int32_t)); + memcpy(tmp->trans_idx, tz->trans_idx, tz->bit32.timecnt * sizeof(unsigned char)); + } + + tmp->type = (ttinfo*) timelib_malloc(tz->bit32.typecnt * sizeof(ttinfo)); + memcpy(tmp->type, tz->type, tz->bit32.typecnt * sizeof(ttinfo)); + + tmp->timezone_abbr = (char*) timelib_malloc(tz->bit32.charcnt); + memcpy(tmp->timezone_abbr, tz->timezone_abbr, tz->bit32.charcnt); + + if (tz->bit32.leapcnt) { + tmp->leap_times = (tlinfo*) timelib_malloc(tz->bit32.leapcnt * sizeof(tlinfo)); + memcpy(tmp->leap_times, tz->leap_times, tz->bit32.leapcnt * sizeof(tlinfo)); + } + + return tmp; +} + +static ttinfo* fetch_timezone_offset(timelib_tzinfo *tz, timelib_sll ts, timelib_sll *transition_time) +{ + uint32_t i; + + /* If there is no transition time, we pick the first one, if that doesn't + * exist we return NULL */ + if (!tz->bit32.timecnt || !tz->trans) { + *transition_time = 0; + if (tz->bit32.typecnt == 1) { + return &(tz->type[0]); + } + return NULL; + } + + /* If the TS is lower than the first transition time, then we scan over + * all the transition times to find the first non-DST one, or the first + * one in case there are only DST entries. Not sure which smartass came up + * with this idea in the first though :) */ + if (ts < tz->trans[0]) { + uint32_t j; + + *transition_time = 0; + j = 0; + while (j < tz->bit32.timecnt && tz->type[tz->trans_idx[j]].isdst) { + ++j; + } + if (j == tz->bit32.timecnt) { + j = 0; + } + return &(tz->type[tz->trans_idx[j]]); + } + + /* In all other cases we loop through the available transtion times to find + * the correct entry */ + for (i = 0; i < tz->bit32.timecnt; i++) { + if (ts < tz->trans[i]) { + *transition_time = tz->trans[i - 1]; + return &(tz->type[tz->trans_idx[i - 1]]); + } + } + *transition_time = tz->trans[tz->bit32.timecnt - 1]; + return &(tz->type[tz->trans_idx[tz->bit32.timecnt - 1]]); +} + +static tlinfo* fetch_leaptime_offset(timelib_tzinfo *tz, timelib_sll ts) +{ + int i; + + if (!tz->bit32.leapcnt || !tz->leap_times) { + return NULL; + } + + for (i = tz->bit32.leapcnt - 1; i > 0; i--) { + if (ts > tz->leap_times[i].trans) { + return &(tz->leap_times[i]); + } + } + return NULL; +} + +int timelib_timestamp_is_in_dst(timelib_sll ts, timelib_tzinfo *tz) +{ + ttinfo *to; + timelib_sll dummy; + + if ((to = fetch_timezone_offset(tz, ts, &dummy))) { + return to->isdst; + } + return -1; +} + +timelib_time_offset *timelib_get_time_zone_info(timelib_sll ts, timelib_tzinfo *tz) +{ + ttinfo *to; + tlinfo *tl; + int32_t offset = 0, leap_secs = 0; + char *abbr; + timelib_time_offset *tmp = timelib_time_offset_ctor(); + timelib_sll transition_time; + + if ((to = fetch_timezone_offset(tz, ts, &transition_time))) { + offset = to->offset; + abbr = &(tz->timezone_abbr[to->abbr_idx]); + tmp->is_dst = to->isdst; + tmp->transition_time = transition_time; + } else { + offset = 0; + abbr = tz->timezone_abbr; + tmp->is_dst = 0; + tmp->transition_time = 0; + } + + if ((tl = fetch_leaptime_offset(tz, ts))) { + leap_secs = -tl->offset; + } + + tmp->offset = offset; + tmp->leap_secs = leap_secs; + tmp->abbr = abbr ? timelib_strdup(abbr) : timelib_strdup("GMT"); + + return tmp; +} + +timelib_sll timelib_get_current_offset(timelib_time *t) +{ + timelib_time_offset *gmt_offset; + timelib_sll retval; + + switch (t->zone_type) { + case TIMELIB_ZONETYPE_ABBR: + case TIMELIB_ZONETYPE_OFFSET: + return t->z + (t->dst * 3600); + + case TIMELIB_ZONETYPE_ID: + gmt_offset = timelib_get_time_zone_info(t->sse, t->tz_info); + retval = gmt_offset->offset; + timelib_time_offset_dtor(gmt_offset); + return retval; + + default: + return 0; + } +}
Locations
Projects
Search
Status Monitor
Help
OpenBuildService.org
Documentation
API Documentation
Code of Conduct
Contact
Support
@OBShq
Terms
openSUSE Build Service is sponsored by
The Open Build Service is an
openSUSE project
.
Sign Up
Log In
Places
Places
All Projects
Status Monitor
