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parse_date.c
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/* Generated by re2c 1.0.3 on Wed Sep 11 17:29:29 2024 */
#line 1 "ext/date/lib/parse_date.re"
/*
* The MIT License (MIT)
*
* Copyright (c) 2015-2023 Derick Rethans
* Copyright (c) 2018 MongoDB, Inc.
*
* 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"
#include <ctype.h>
#include <errno.h>
#include <math.h>
#include <assert.h>
#include <limits.h>
#if defined(_MSC_VER)
# define strtoll(s, f, b) _atoi64(s)
#elif !defined(HAVE_STRTOLL)
# if defined(HAVE_ATOLL)
# define strtoll(s, f, b) atoll(s)
# else
# define strtoll(s, f, b) strtol(s, f, b)
# endif
#endif
#define EOI 257
#define TIME 258
#define DATE 259
#define TIMELIB_XMLRPC_SOAP 260
#define TIMELIB_TIME12 261
#define TIMELIB_TIME24 262
#define TIMELIB_GNU_NOCOLON 263
#define TIMELIB_GNU_NOCOLON_TZ 264
#define TIMELIB_ISO_NOCOLON 265
#define TIMELIB_AMERICAN 266
#define TIMELIB_ISO_DATE 267
#define TIMELIB_DATE_FULL 268
#define TIMELIB_DATE_TEXT 269
#define TIMELIB_DATE_NOCOLON 270
#define TIMELIB_PG_YEARDAY 271
#define TIMELIB_PG_TEXT 272
#define TIMELIB_PG_REVERSE 273
#define TIMELIB_CLF 274
#define TIMELIB_DATE_NO_DAY 275
#define TIMELIB_SHORTDATE_WITH_TIME 276
#define TIMELIB_DATE_FULL_POINTED 277
#define TIMELIB_TIME24_WITH_ZONE 278
#define TIMELIB_ISO_WEEK 279
#define TIMELIB_LF_DAY_OF_MONTH 280
#define TIMELIB_WEEK_DAY_OF_MONTH 281
#define TIMELIB_TIMEZONE 300
#define TIMELIB_AGO 301
#define TIMELIB_RELATIVE 310
#define TIMELIB_ERROR 999
/* Some compilers like AIX, defines uchar in sys/types.h */
#undef uchar
typedef unsigned char uchar;
#define BSIZE 8192
#define YYCTYPE uchar
#define YYCURSOR cursor
#define YYLIMIT s->lim
#define YYMARKER s->ptr
#define YYFILL(n) return EOI;
#define RET(i) {s->cur = cursor; return i;}
#define timelib_string_free timelib_free
#define TIMELIB_HAVE_TIME() { if (s->time->have_time) { add_error(s, TIMELIB_ERR_DOUBLE_TIME, "Double time specification"); timelib_string_free(str); return TIMELIB_ERROR; } else { s->time->have_time = 1; s->time->h = 0; s->time->i = 0; s->time->s = 0; s->time->us = 0; } }
#define TIMELIB_UNHAVE_TIME() { s->time->have_time = 0; s->time->h = 0; s->time->i = 0; s->time->s = 0; s->time->us = 0; }
#define TIMELIB_HAVE_DATE() { if (s->time->have_date) { add_error(s, TIMELIB_ERR_DOUBLE_DATE, "Double date specification"); timelib_string_free(str); return TIMELIB_ERROR; } else { s->time->have_date = 1; } }
#define TIMELIB_UNHAVE_DATE() { s->time->have_date = 0; s->time->d = 0; s->time->m = 0; s->time->y = 0; }
#define TIMELIB_HAVE_RELATIVE() { s->time->have_relative = 1; }
#define TIMELIB_HAVE_WEEKDAY_RELATIVE() { s->time->have_relative = 1; s->time->relative.have_weekday_relative = 1; }
#define TIMELIB_HAVE_SPECIAL_RELATIVE() { s->time->have_relative = 1; s->time->relative.have_special_relative = 1; }
#define TIMELIB_HAVE_TZ() { s->cur = cursor; if (s->time->have_zone) { s->time->have_zone > 1 ? add_error(s, TIMELIB_ERR_DOUBLE_TZ, "Double timezone specification") : add_warning(s, TIMELIB_WARN_DOUBLE_TZ, "Double timezone specification"); timelib_string_free(str); s->time->have_zone++; return TIMELIB_ERROR; } else { s->time->have_zone++; } }
#define TIMELIB_INIT s->cur = cursor; str = timelib_string(s); ptr = str
#define TIMELIB_DEINIT timelib_string_free(str)
#define TIMELIB_ADJUST_RELATIVE_WEEKDAY() if (in->time.have_weekday_relative && (in.rel.d > 0)) { in.rel.d -= 7; }
#define TIMELIB_PROCESS_YEAR(x, l) { \
if (((x) == TIMELIB_UNSET) || ((l) >= 4)) { \
/* (x) = 0; */ \
} else if ((x) < 100) { \
if ((x) < 70) { \
(x) += 2000; \
} else { \
(x) += 1900; \
} \
} \
}
#ifdef DEBUG_PARSER
#define DEBUG_OUTPUT(s) printf("%s\n", s);
#define YYDEBUG(s,c) { if (s != -1) { printf("state: %d ", s); printf("[%c]\n", c); } }
#else
#define DEBUG_OUTPUT(s)
#define YYDEBUG(s,c)
#endif
typedef struct _timelib_elems {
unsigned int c; /* Number of elements */
char **v; /* Values */
} timelib_elems;
typedef struct _Scanner {
int fd;
uchar *lim, *str, *ptr, *cur, *tok, *pos;
unsigned int line, len;
timelib_error_container *errors;
timelib_time *time;
const timelib_tzdb *tzdb;
} Scanner;
typedef struct _timelib_lookup_table {
const char *name;
int type;
int value;
} timelib_lookup_table;
typedef struct _timelib_relunit {
const char *name;
int unit;
int multiplier;
} timelib_relunit;
/* The timezone table. */
static const timelib_tz_lookup_table timelib_timezone_lookup[] = {
#include "timezonemap.h"
{ NULL, 0, 0, NULL },
};
static const timelib_tz_lookup_table timelib_timezone_fallbackmap[] = {
#include "fallbackmap.h"
{ NULL, 0, 0, NULL },
};
static const timelib_tz_lookup_table timelib_timezone_utc[] = {
{ "utc", 0, 0, "UTC" },
};
#if defined(_POSIX_TZNAME_MAX)
# define MAX_ABBR_LEN _POSIX_TZNAME_MAX
#elif defined(TZNAME_MAX)
# define MAX_ABBR_LEN TZNAME_MAX
#else
# define MAX_ABBR_LEN 6
#endif
static timelib_relunit const timelib_relunit_lookup[] = {
{ "ms", TIMELIB_MICROSEC, 1000 },
{ "msec", TIMELIB_MICROSEC, 1000 },
{ "msecs", TIMELIB_MICROSEC, 1000 },
{ "millisecond", TIMELIB_MICROSEC, 1000 },
{ "milliseconds", TIMELIB_MICROSEC, 1000 },
{ "µs", TIMELIB_MICROSEC, 1 },
{ "usec", TIMELIB_MICROSEC, 1 },
{ "usecs", TIMELIB_MICROSEC, 1 },
{ "µsec", TIMELIB_MICROSEC, 1 },
{ "µsecs", TIMELIB_MICROSEC, 1 },
{ "microsecond", TIMELIB_MICROSEC, 1 },
{ "microseconds", TIMELIB_MICROSEC, 1 },
{ "sec", TIMELIB_SECOND, 1 },
{ "secs", TIMELIB_SECOND, 1 },
{ "second", TIMELIB_SECOND, 1 },
{ "seconds", TIMELIB_SECOND, 1 },
{ "min", TIMELIB_MINUTE, 1 },
{ "mins", TIMELIB_MINUTE, 1 },
{ "minute", TIMELIB_MINUTE, 1 },
{ "minutes", TIMELIB_MINUTE, 1 },
{ "hour", TIMELIB_HOUR, 1 },
{ "hours", TIMELIB_HOUR, 1 },
{ "day", TIMELIB_DAY, 1 },
{ "days", TIMELIB_DAY, 1 },
{ "week", TIMELIB_DAY, 7 },
{ "weeks", TIMELIB_DAY, 7 },
{ "fortnight", TIMELIB_DAY, 14 },
{ "fortnights", TIMELIB_DAY, 14 },
{ "forthnight", TIMELIB_DAY, 14 },
{ "forthnights", TIMELIB_DAY, 14 },
{ "month", TIMELIB_MONTH, 1 },
{ "months", TIMELIB_MONTH, 1 },
{ "year", TIMELIB_YEAR, 1 },
{ "years", TIMELIB_YEAR, 1 },
{ "mondays", TIMELIB_WEEKDAY, 1 },
{ "monday", TIMELIB_WEEKDAY, 1 },
{ "mon", TIMELIB_WEEKDAY, 1 },
{ "tuesdays", TIMELIB_WEEKDAY, 2 },
{ "tuesday", TIMELIB_WEEKDAY, 2 },
{ "tue", TIMELIB_WEEKDAY, 2 },
{ "wednesdays", TIMELIB_WEEKDAY, 3 },
{ "wednesday", TIMELIB_WEEKDAY, 3 },
{ "wed", TIMELIB_WEEKDAY, 3 },
{ "thursdays", TIMELIB_WEEKDAY, 4 },
{ "thursday", TIMELIB_WEEKDAY, 4 },
{ "thu", TIMELIB_WEEKDAY, 4 },
{ "fridays", TIMELIB_WEEKDAY, 5 },
{ "friday", TIMELIB_WEEKDAY, 5 },
{ "fri", TIMELIB_WEEKDAY, 5 },
{ "saturdays", TIMELIB_WEEKDAY, 6 },
{ "saturday", TIMELIB_WEEKDAY, 6 },
{ "sat", TIMELIB_WEEKDAY, 6 },
{ "sundays", TIMELIB_WEEKDAY, 0 },
{ "sunday", TIMELIB_WEEKDAY, 0 },
{ "sun", TIMELIB_WEEKDAY, 0 },
{ "weekday", TIMELIB_SPECIAL, TIMELIB_SPECIAL_WEEKDAY },
{ "weekdays", TIMELIB_SPECIAL, TIMELIB_SPECIAL_WEEKDAY },
{ NULL, 0, 0 }
};
/* The relative text table. */
static timelib_lookup_table const timelib_reltext_lookup[] = {
{ "first", 0, 1 },
{ "next", 0, 1 },
{ "second", 0, 2 },
{ "third", 0, 3 },
{ "fourth", 0, 4 },
{ "fifth", 0, 5 },
{ "sixth", 0, 6 },
{ "seventh", 0, 7 },
{ "eight", 0, 8 },
{ "eighth", 0, 8 },
{ "ninth", 0, 9 },
{ "tenth", 0, 10 },
{ "eleventh", 0, 11 },
{ "twelfth", 0, 12 },
{ "last", 0, -1 },
{ "previous", 0, -1 },
{ "this", 1, 0 },
{ NULL, 1, 0 }
};
/* The month table. */
static timelib_lookup_table const timelib_month_lookup[] = {
{ "jan", 0, 1 },
{ "feb", 0, 2 },
{ "mar", 0, 3 },
{ "apr", 0, 4 },
{ "may", 0, 5 },
{ "jun", 0, 6 },
{ "jul", 0, 7 },
{ "aug", 0, 8 },
{ "sep", 0, 9 },
{ "sept", 0, 9 },
{ "oct", 0, 10 },
{ "nov", 0, 11 },
{ "dec", 0, 12 },
{ "i", 0, 1 },
{ "ii", 0, 2 },
{ "iii", 0, 3 },
{ "iv", 0, 4 },
{ "v", 0, 5 },
{ "vi", 0, 6 },
{ "vii", 0, 7 },
{ "viii", 0, 8 },
{ "ix", 0, 9 },
{ "x", 0, 10 },
{ "xi", 0, 11 },
{ "xii", 0, 12 },
{ "january", 0, 1 },
{ "february", 0, 2 },
{ "march", 0, 3 },
{ "april", 0, 4 },
{ "may", 0, 5 },
{ "june", 0, 6 },
{ "july", 0, 7 },
{ "august", 0, 8 },
{ "september", 0, 9 },
{ "october", 0, 10 },
{ "november", 0, 11 },
{ "december", 0, 12 },
{ NULL, 0, 0 }
};
#if 0
static char* timelib_ltrim(char *s)
{
char *ptr = s;
while (ptr[0] == ' ' || ptr[0] == '\t') {
ptr++;
}
return ptr;
}
#endif
#if 0
uchar *fill(Scanner *s, uchar *cursor){
if(!s->eof){
unsigned int cnt = s->tok - s->bot;
if(cnt){
memcpy(s->bot, s->tok, s->lim - s->tok);
s->tok = s->bot;
s->ptr -= cnt;
cursor -= cnt;
s->pos -= cnt;
s->lim -= cnt;
}
if((s->top - s->lim) < BSIZE){
uchar *buf = (uchar*) timelib_malloc(((s->lim - s->bot) + BSIZE)*sizeof(uchar));
memcpy(buf, s->tok, s->lim - s->tok);
s->tok = buf;
s->ptr = &buf[s->ptr - s->bot];
cursor = &buf[cursor - s->bot];
s->pos = &buf[s->pos - s->bot];
s->lim = &buf[s->lim - s->bot];
s->top = &s->lim[BSIZE];
timelib_free(s->bot);
s->bot = buf;
}
if((cnt = read(s->fd, (char*) s->lim, BSIZE)) != BSIZE){
s->eof = &s->lim[cnt]; *(s->eof)++ = '\n';
}
s->lim += cnt;
}
return cursor;
}
#endif
static timelib_error_message *alloc_error_message(timelib_error_message **messages, int *count)
{
/* Realloc in power of two increments */
int is_pow2 = (*count & (*count - 1)) == 0;
if (is_pow2) {
size_t alloc_size = *count ? (*count * 2) : 1;
*messages = timelib_realloc(*messages, alloc_size * sizeof(timelib_error_message));
}
return *messages + (*count)++;
}
static void add_warning(Scanner *s, int error_code, const char *error)
{
timelib_error_message *message = alloc_error_message(&s->errors->warning_messages, &s->errors->warning_count);
message->error_code = error_code;
message->position = s->tok ? s->tok - s->str : 0;
message->character = s->tok ? *s->tok : 0;
message->message = timelib_strdup(error);
}
static void add_error(Scanner *s, int error_code, const char *error)
{
timelib_error_message *message = alloc_error_message(&s->errors->error_messages, &s->errors->error_count);
message->error_code = error_code;
message->position = s->tok ? s->tok - s->str : 0;
message->character = s->tok ? *s->tok : 0;
message->message = timelib_strdup(error);
}
static void add_pbf_warning(Scanner *s, int error_code, const char *error, const char *sptr, const char *cptr)
{
timelib_error_message *message = alloc_error_message(&s->errors->warning_messages, &s->errors->warning_count);
message->error_code = error_code;
message->position = cptr - sptr;
message->character = *cptr;
message->message = timelib_strdup(error);
}
static void add_pbf_error(Scanner *s, int error_code, const char *error, const char *sptr, const char *cptr)
{
timelib_error_message *message = alloc_error_message(&s->errors->error_messages, &s->errors->error_count);
message->error_code = error_code;
message->position = cptr - sptr;
message->character = *cptr;
message->message = timelib_strdup(error);
}
static timelib_sll timelib_meridian(const char **ptr, timelib_sll h)
{
timelib_sll retval = 0;
while (!strchr("AaPp", **ptr)) {
++*ptr;
}
if (**ptr == 'a' || **ptr == 'A') {
if (h == 12) {
retval = -12;
}
} else if (h != 12) {
retval = 12;
}
++*ptr;
if (**ptr == '.') {
++*ptr;
}
if (**ptr == 'M' || **ptr == 'm') {
++*ptr;
}
if (**ptr == '.') {
++*ptr;
}
return retval;
}
static timelib_sll timelib_meridian_with_check(const char **ptr, timelib_sll h)
{
timelib_sll retval = 0;
while (**ptr && !strchr("AaPp", **ptr)) {
++*ptr;
}
if(!**ptr) {
return TIMELIB_UNSET;
}
if (**ptr == 'a' || **ptr == 'A') {
if (h == 12) {
retval = -12;
}
} else if (h != 12) {
retval = 12;
}
++*ptr;
if (**ptr == '.') {
++*ptr;
if (**ptr != 'm' && **ptr != 'M') {
return TIMELIB_UNSET;
}
++*ptr;
if (**ptr != '.' ) {
return TIMELIB_UNSET;
}
++*ptr;
} else if (**ptr == 'm' || **ptr == 'M') {
++*ptr;
} else {
return TIMELIB_UNSET;
}
return retval;
}
static char *timelib_string(Scanner *s)
{
char *tmp = timelib_calloc(1, s->cur - s->tok + 1);
memcpy(tmp, s->tok, s->cur - s->tok);
return tmp;
}
static timelib_sll timelib_get_nr_ex(const char **ptr, int max_length, int *scanned_length)
{
const char *begin, *end;
char *str;
timelib_sll tmp_nr = TIMELIB_UNSET;
int len = 0;
while ((**ptr < '0') || (**ptr > '9')) {
if (**ptr == '\0') {
return TIMELIB_UNSET;
}
++*ptr;
}
begin = *ptr;
while ((**ptr >= '0') && (**ptr <= '9') && len < max_length) {
++*ptr;
++len;
}
end = *ptr;
if (scanned_length) {
*scanned_length = end - begin;
}
str = timelib_calloc(1, end - begin + 1);
memcpy(str, begin, end - begin);
tmp_nr = strtoll(str, NULL, 10);
timelib_free(str);
return tmp_nr;
}
static timelib_sll timelib_get_nr(const char **ptr, int max_length)
{
return timelib_get_nr_ex(ptr, max_length, NULL);
}
static void timelib_skip_day_suffix(const char **ptr)
{
if (isspace(**ptr)) {
return;
}
if (!timelib_strncasecmp(*ptr, "nd", 2) || !timelib_strncasecmp(*ptr, "rd", 2) ||!timelib_strncasecmp(*ptr, "st", 2) || !timelib_strncasecmp(*ptr, "th", 2)) {
*ptr += 2;
}
}
static timelib_sll timelib_get_frac_nr(const char **ptr)
{
const char *begin, *end;
char *str;
double tmp_nr = TIMELIB_UNSET;
while ((**ptr != '.') && (**ptr != ':') && ((**ptr < '0') || (**ptr > '9'))) {
if (**ptr == '\0') {
return TIMELIB_UNSET;
}
++*ptr;
}
begin = *ptr;
while ((**ptr == '.') || (**ptr == ':') || ((**ptr >= '0') && (**ptr <= '9'))) {
++*ptr;
}
end = *ptr;
str = timelib_calloc(1, end - begin);
memcpy(str, begin + 1, end - begin - 1);
tmp_nr = strtod(str, NULL) * pow(10, 7 - (end - begin));
timelib_free(str);
return tmp_nr;
}
static timelib_ull timelib_get_signed_nr(Scanner *s, const char **ptr, int max_length)
{
char *str, *str_ptr;
timelib_sll tmp_nr = 0;
int len = 0;
/* Skip over non-numeric chars */
while (((**ptr < '0') || (**ptr > '9')) && (**ptr != '+') && (**ptr != '-')) {
if (**ptr == '\0') {
add_error(s, TIMELIB_ERR_UNEXPECTED_DATA, "Found unexpected data");
return 0;
}
++*ptr;
}
/* Allocate string to feed to strtoll(): sign + length + '\0' */
str = timelib_calloc(1, max_length + 2);
str[0] = '+'; /* First position is the sign */
str_ptr = str + 1;
while ((**ptr == '+') || (**ptr == '-')) {
if (**ptr == '-') {
str[0] = str[0] == '+' ? '-' : '+';
}
++*ptr;
}
while (((**ptr < '0') || (**ptr > '9'))) {
if (**ptr == '\0') {
timelib_free(str);
add_error(s, TIMELIB_ERR_UNEXPECTED_DATA, "Found unexpected data");
return 0;
}
++*ptr;
}
while ((**ptr >= '0') && (**ptr <= '9') && len < max_length) {
*str_ptr = **ptr;
++*ptr;
++str_ptr;
++len;
}
errno = 0;
tmp_nr = strtoll(str, NULL, 10);
if (errno == ERANGE) {
timelib_free(str);
add_error(s, TIMELIB_ERR_NUMBER_OUT_OF_RANGE, "Number out of range");
return 0;
}
timelib_free(str);
return tmp_nr;
}
static timelib_sll timelib_lookup_relative_text(const char **ptr, int *behavior)
{
char *word;
const char *begin = *ptr, *end;
timelib_sll value = 0;
const timelib_lookup_table *tp;
while ((**ptr >= 'A' && **ptr <= 'Z') || (**ptr >= 'a' && **ptr <= 'z')) {
++*ptr;
}
end = *ptr;
word = timelib_calloc(1, end - begin + 1);
memcpy(word, begin, end - begin);
for (tp = timelib_reltext_lookup; tp->name; tp++) {
if (timelib_strcasecmp(word, tp->name) == 0) {
value = tp->value;
*behavior = tp->type;
}
}
timelib_free(word);
return value;
}
static timelib_sll timelib_get_relative_text(const char **ptr, int *behavior)
{
while (**ptr == ' ' || **ptr == '\t' || **ptr == '-' || **ptr == '/') {
++*ptr;
}
return timelib_lookup_relative_text(ptr, behavior);
}
static timelib_long timelib_lookup_month(const char **ptr)
{
char *word;
const char *begin = *ptr, *end;
timelib_long value = 0;
const timelib_lookup_table *tp;
while ((**ptr >= 'A' && **ptr <= 'Z') || (**ptr >= 'a' && **ptr <= 'z')) {
++*ptr;
}
end = *ptr;
word = timelib_calloc(1, end - begin + 1);
memcpy(word, begin, end - begin);
for (tp = timelib_month_lookup; tp->name; tp++) {
if (timelib_strcasecmp(word, tp->name) == 0) {
value = tp->value;
}
}
timelib_free(word);
return value;
}
static timelib_long timelib_get_month(const char **ptr)
{
while (**ptr == ' ' || **ptr == '\t' || **ptr == '-' || **ptr == '.' || **ptr == '/') {
++*ptr;
}
return timelib_lookup_month(ptr);
}
static void timelib_eat_spaces(const char **ptr)
{
do {
if (**ptr == ' ' || **ptr == '\t') {
++*ptr;
continue;
}
if ((*ptr)[0] == '\xe2' && (*ptr)[1] == '\x80' && (*ptr)[2] == '\xaf') { // NNBSP
*ptr += 3;
continue;
}
if ((*ptr)[0] == '\xc2' && (*ptr)[1] == '\xa0') { // NBSP
*ptr += 2;
continue;
}
break;
} while (true);
}
static void timelib_eat_until_separator(const char **ptr)
{
++*ptr;
while (strchr(" \t.,:;/-0123456789", **ptr) == NULL) {
++*ptr;
}
}
static const timelib_relunit* timelib_lookup_relunit(const char **ptr)
{
char *word;
const char *begin = *ptr, *end;
const timelib_relunit *tp, *value = NULL;
while (**ptr != '\0' && **ptr != ' ' && **ptr != ',' && **ptr != '\t' && **ptr != ';' && **ptr != ':' &&
**ptr != '/' && **ptr != '.' && **ptr != '-' && **ptr != '(' && **ptr != ')' ) {
++*ptr;
}
end = *ptr;
word = timelib_calloc(1, end - begin + 1);
memcpy(word, begin, end - begin);
for (tp = timelib_relunit_lookup; tp->name; tp++) {
if (timelib_strcasecmp(word, tp->name) == 0) {
value = tp;
break;
}
}
timelib_free(word);
return value;
}
static void add_with_overflow(Scanner *s, timelib_sll *e, timelib_sll amount, int multiplier)
{
#if TIMELIB_HAVE_BUILTIN_SADDLL_OVERFLOW
if (__builtin_saddll_overflow(*e, amount * multiplier, e)) {
add_error(s, TIMELIB_ERR_NUMBER_OUT_OF_RANGE, "Number out of range");
}
#else
*e += (amount * multiplier);
#endif
}
/**
* The time_part parameter is a flag. It can be TIMELIB_TIME_PART_KEEP in case
* the time portion should not be reset to midnight, or
* TIMELIB_TIME_PART_DONT_KEEP in case it does need to be reset. This is used
* for not overwriting the time portion for 'X weekday'.
*/
static void timelib_set_relative(const char **ptr, timelib_sll amount, int behavior, Scanner *s, int time_part)
{
const timelib_relunit* relunit;
if (!(relunit = timelib_lookup_relunit(ptr))) {
return;
}
switch (relunit->unit) {
case TIMELIB_MICROSEC: add_with_overflow(s, &s->time->relative.us, amount, relunit->multiplier); break;
case TIMELIB_SECOND: add_with_overflow(s, &s->time->relative.s, amount, relunit->multiplier); break;
case TIMELIB_MINUTE: add_with_overflow(s, &s->time->relative.i, amount, relunit->multiplier); break;
case TIMELIB_HOUR: add_with_overflow(s, &s->time->relative.h, amount, relunit->multiplier); break;
case TIMELIB_DAY: add_with_overflow(s, &s->time->relative.d, amount, relunit->multiplier); break;
case TIMELIB_MONTH: add_with_overflow(s, &s->time->relative.m, amount, relunit->multiplier); break;
case TIMELIB_YEAR: add_with_overflow(s, &s->time->relative.y, amount, relunit->multiplier); break;
case TIMELIB_WEEKDAY:
TIMELIB_HAVE_WEEKDAY_RELATIVE();
if (time_part != TIMELIB_TIME_PART_KEEP) {
TIMELIB_UNHAVE_TIME();
}
s->time->relative.d += (amount > 0 ? amount - 1 : amount) * 7;
s->time->relative.weekday = relunit->multiplier;
s->time->relative.weekday_behavior = behavior;
break;
case TIMELIB_SPECIAL:
TIMELIB_HAVE_SPECIAL_RELATIVE();
if (time_part != TIMELIB_TIME_PART_KEEP) {
TIMELIB_UNHAVE_TIME();
}
s->time->relative.special.type = relunit->multiplier;
s->time->relative.special.amount = amount;
}
}
static const timelib_tz_lookup_table* abbr_search(const char *word, timelib_long gmtoffset, int isdst)
{
int first_found = 0;
const timelib_tz_lookup_table *tp, *first_found_elem = NULL;
const timelib_tz_lookup_table *fmp;
if (timelib_strcasecmp("utc", word) == 0 || timelib_strcasecmp("gmt", word) == 0) {
return timelib_timezone_utc;
}
for (tp = timelib_timezone_lookup; tp->name; tp++) {
if (timelib_strcasecmp(word, tp->name) == 0) {
if (!first_found) {
first_found = 1;
first_found_elem = tp;
if (gmtoffset == -1) {
return tp;
}
}
if (tp->gmtoffset == gmtoffset) {
return tp;
}
}
}
if (first_found) {
return first_found_elem;
}
/* Still didn't find anything, let's find the zone solely based on
* offset/isdst then */
for (fmp = timelib_timezone_fallbackmap; fmp->name; fmp++) {
if (fmp->gmtoffset == gmtoffset && fmp->type == isdst) {
return fmp;
}
}
return NULL;
}
static timelib_long timelib_lookup_abbr(const char **ptr, int *dst, char **tz_abbr, int *found)
{
char *word;
const char *begin = *ptr, *end;
timelib_long value = 0;
const timelib_tz_lookup_table *tp;
/* Only include A-Z, a-z, 0-9, /, _, and - in abbreviations/TZ IDs */
while (
(**ptr >= 'A' && **ptr <= 'Z') ||
(**ptr >= 'a' && **ptr <= 'z') ||
(**ptr >= '0' && **ptr <= '9') ||
**ptr == '/' || **ptr == '_' || **ptr == '-' || **ptr == '+'
) {
++*ptr;
}
end = *ptr;
word = timelib_calloc(1, end - begin + 1);
memcpy(word, begin, end - begin);
if (end - begin < MAX_ABBR_LEN && (tp = abbr_search(word, -1, 0))) {
value = tp->gmtoffset;
*dst = tp->type;
value -= tp->type * 3600;
*found = 1;
} else {
*found = 0;
}
*tz_abbr = word;
return value;
}
#define sHOUR(a) (int)(a * 3600)
#define sMIN(a) (int)(a * 60)
static timelib_long timelib_parse_tz_cor(const char **ptr, int *tz_not_found)
{
const char *begin = *ptr, *end;
timelib_long tmp;
*tz_not_found = 1;
while (isdigit(**ptr) || **ptr == ':') {
++*ptr;
}
end = *ptr;
switch (end - begin) {
case 1: /* H */
case 2: /* HH */
*tz_not_found = 0;
return sHOUR(strtol(begin, NULL, 10));
case 3: /* H:M */
case 4: /* H:MM, HH:M, HHMM */
if (begin[1] == ':') {
*tz_not_found = 0;
tmp = sHOUR(strtol(begin, NULL, 10)) + sMIN(strtol(begin + 2, NULL, 10));
return tmp;
} else if (begin[2] == ':') {
*tz_not_found = 0;
tmp = sHOUR(strtol(begin, NULL, 10)) + sMIN(strtol(begin + 3, NULL, 10));
return tmp;
} else {
*tz_not_found = 0;
tmp = strtol(begin, NULL, 10);
return sHOUR(tmp / 100) + sMIN(tmp % 100);
}
case 5: /* HH:MM */
if (begin[2] != ':') {
break;
}
*tz_not_found = 0;
tmp = sHOUR(strtol(begin, NULL, 10)) + sMIN(strtol(begin + 3, NULL, 10));
return tmp;
case 6: /* HHMMSS */
*tz_not_found = 0;
tmp = strtol(begin, NULL, 10);
tmp = sHOUR(tmp / 10000) + sMIN((tmp / 100) % 100) + (tmp % 100);
return tmp;
case 8: /* HH:MM:SS */
if (begin[2] != ':' || begin[5] != ':') {
break;
}
*tz_not_found = 0;
tmp = sHOUR(strtol(begin, NULL, 10)) + sMIN(strtol(begin + 3, NULL, 10)) + strtol(begin + 6, NULL, 10);
return tmp;
}
return 0;
}
static timelib_long timelib_parse_tz_minutes(const char **ptr, timelib_time *t)
{
timelib_long retval = TIMELIB_UNSET;
const char *begin = *ptr;
/* First character must be +/- */
if (**ptr != '+' && **ptr != '-') {
return retval;
}
++*ptr;
while (isdigit(**ptr)) {
++*ptr;
}
if (*begin == '+') {
t->is_localtime = 1;
t->zone_type = TIMELIB_ZONETYPE_OFFSET;
t->dst = 0;
retval = sMIN(strtol(begin + 1, NULL, 10));
} else if (*begin == '-') {
t->is_localtime = 1;
t->zone_type = TIMELIB_ZONETYPE_OFFSET;
t->dst = 0;
retval = -1 * sMIN(strtol(begin + 1, NULL, 10));
}
return retval;
}
timelib_long timelib_parse_zone(const char **ptr, int *dst, timelib_time *t, int *tz_not_found, const timelib_tzdb *tzdb, timelib_tz_get_wrapper tz_wrapper)
{
timelib_tzinfo *res;
timelib_long retval = 0;
*tz_not_found = 0;
while (**ptr == ' ' || **ptr == '\t' || **ptr == '(') {
++*ptr;
}
if ((*ptr)[0] == 'G' && (*ptr)[1] == 'M' && (*ptr)[2] == 'T' && ((*ptr)[3] == '+' || (*ptr)[3] == '-')) {
*ptr += 3;
}
if (**ptr == '+') {
++*ptr;
t->is_localtime = 1;
t->zone_type = TIMELIB_ZONETYPE_OFFSET;
t->dst = 0;
retval = timelib_parse_tz_cor(ptr, tz_not_found);
} else if (**ptr == '-') {
++*ptr;
t->is_localtime = 1;
t->zone_type = TIMELIB_ZONETYPE_OFFSET;
t->dst = 0;
retval = -1 * timelib_parse_tz_cor(ptr, tz_not_found);
} else {
int found = 0;
timelib_long offset = 0;
char *tz_abbr;
t->is_localtime = 1;
/* First, we lookup by abbreviation only */
offset = timelib_lookup_abbr(ptr, dst, &tz_abbr, &found);
if (found) {
t->zone_type = TIMELIB_ZONETYPE_ABBR;
t->dst = *dst;
timelib_time_tz_abbr_update(t, tz_abbr);
}
/* Otherwise, we look if we have a TimeZone identifier */
if (!found || strcmp("UTC", tz_abbr) == 0) {
int dummy_error_code;
if ((res = tz_wrapper(tz_abbr, tzdb, &dummy_error_code)) != NULL) {
t->tz_info = res;
t->zone_type = TIMELIB_ZONETYPE_ID;
found++;
}
}
timelib_free(tz_abbr);
*tz_not_found = (found == 0);
retval = offset;
}
while (**ptr == ')') {
++*ptr;
}
return retval;
}