parse_iso_intervals.re [plain text]
/*
* 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.
*/
/* $Id$ */
#include "timelib.h"
#include <stdio.h>
#include <ctype.h>
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#else
#include <strings.h>
#endif
#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 TIMELIB_UNSET -99999
#define TIMELIB_SECOND 1
#define TIMELIB_MINUTE 2
#define TIMELIB_HOUR 3
#define TIMELIB_DAY 4
#define TIMELIB_MONTH 5
#define TIMELIB_YEAR 6
#define EOI 257
#define TIMELIB_PERIOD 260
#define TIMELIB_ISO_DATE 261
#define TIMELIB_ERROR 999
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_INIT s->cur = cursor; str = timelib_string(s); ptr = str
#define TIMELIB_DEINIT timelib_string_free(str)
#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
#include "timelib_structs.h"
typedef struct Scanner {
int fd;
uchar *lim, *str, *ptr, *cur, *tok, *pos;
unsigned int line, len;
struct timelib_error_container *errors;
struct timelib_time *begin;
struct timelib_time *end;
struct timelib_rel_time *period;
int recurrences;
int have_period;
int have_recurrences;
int have_date;
int have_begin_date;
int have_end_date;
} Scanner;
static void add_warning(Scanner *s, char *error)
{
s->errors->warning_count++;
s->errors->warning_messages = timelib_realloc(s->errors->warning_messages, s->errors->warning_count * sizeof(timelib_error_message));
s->errors->warning_messages[s->errors->warning_count - 1].position = s->tok ? s->tok - s->str : 0;
s->errors->warning_messages[s->errors->warning_count - 1].character = s->tok ? *s->tok : 0;
s->errors->warning_messages[s->errors->warning_count - 1].message = timelib_strdup(error);
}
static void add_error(Scanner *s, char *error)
{
s->errors->error_count++;
s->errors->error_messages = timelib_realloc(s->errors->error_messages, s->errors->error_count * sizeof(timelib_error_message));
s->errors->error_messages[s->errors->error_count - 1].position = s->tok ? s->tok - s->str : 0;
s->errors->error_messages[s->errors->error_count - 1].character = s->tok ? *s->tok : 0;
s->errors->error_messages[s->errors->error_count - 1].message = timelib_strdup(error);
}
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(char **ptr, int max_length)
{
char *begin, *end, *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;
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_ull timelib_get_unsigned_nr(char **ptr, int max_length)
{
timelib_ull dir = 1;
while (((**ptr < '0') || (**ptr > '9')) && (**ptr != '+') && (**ptr != '-')) {
if (**ptr == '\0') {
return TIMELIB_UNSET;
}
++*ptr;
}
while (**ptr == '+' || **ptr == '-')
{
if (**ptr == '-') {
dir *= -1;
}
++*ptr;
}
return dir * timelib_get_nr(ptr, max_length);
}
static void timelib_eat_spaces(char **ptr)
{
while (**ptr == ' ' || **ptr == '\t') {
++*ptr;
}
}
static void timelib_eat_until_separator(char **ptr)
{
while (strchr(" \t.,:;/-0123456789", **ptr) == NULL) {
++*ptr;
}
}
static timelib_long timelib_get_zone(char **ptr, int *dst, timelib_time *t, int *tz_not_found, const timelib_tzdb *tzdb)
{
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;
*tz_not_found = 0;
t->dst = 0;
retval = -1 * timelib_parse_tz_cor(ptr);
} else if (**ptr == '-') {
++*ptr;
t->is_localtime = 1;
t->zone_type = TIMELIB_ZONETYPE_OFFSET;
*tz_not_found = 0;
t->dst = 0;
retval = timelib_parse_tz_cor(ptr);
}
while (**ptr == ')') {
++*ptr;
}
return retval;
}
#define timelib_split_free(arg) { \
int i; \
for (i = 0; i < arg.c; i++) { \
timelib_free(arg.v[i]); \
} \
if (arg.v) { \
timelib_free(arg.v); \
} \
}
/* date parser's scan function too large for VC6 - VC7.x
drop the optimization solves the problem */
#ifdef PHP_WIN32
#pragma optimize( "", off )
#endif
static int scan(Scanner *s)
{
uchar *cursor = s->cur;
char *str, *ptr = NULL;
std:
s->tok = cursor;
s->len = 0;
/*!re2c
/* */
any = [\000-\377];
number = [0-9]+;
hour24lz = [01][0-9] | "2"[0-4];
minutelz = [0-5][0-9];
monthlz = "0" [1-9] | "1" [0-2];
monthlzz = "0" [0-9] | "1" [0-2];
daylz = "0" [1-9] | [1-2][0-9] | "3" [01];
daylzz = "0" [0-9] | [1-2][0-9] | "3" [01];
secondlz = minutelz;
year4 = [0-9]{4};
weekofyear = "0"[1-9] | [1-4][0-9] | "5"[0-3];
space = [ \t]+;
datetimebasic = year4 monthlz daylz "T" hour24lz minutelz secondlz "Z";
datetimeextended = year4 "-" monthlz "-" daylz "T" hour24lz ':' minutelz ':' secondlz "Z";
period = "P" (number "Y")? (number "M")? (number "W")? (number "D")? ("T" (number "H")? (number "M")? (number "S")?)?;
combinedrep = "P" year4 "-" monthlzz "-" daylzz "T" hour24lz ':' minutelz ':' secondlz;
recurrences = "R" number;
isoweekday = year4 "-"? "W" weekofyear "-"? [0-7];
isoweek = year4 "-"? "W" weekofyear;
*/
/*!re2c
/* so that vim highlights correctly */
recurrences
{
DEBUG_OUTPUT("recurrences");
TIMELIB_INIT;
ptr++;
s->recurrences = timelib_get_unsigned_nr((char **) &ptr, 9);
TIMELIB_DEINIT;
s->have_recurrences = 1;
return TIMELIB_PERIOD;
}
datetimebasic| datetimeextended
{
timelib_time *current;
if (s->have_date || s->have_period) {
current = s->end;
s->have_end_date = 1;
} else {
current = s->begin;
s->have_begin_date = 1;
}
DEBUG_OUTPUT("datetimebasic | datetimeextended");
TIMELIB_INIT;
current->y = timelib_get_nr((char **) &ptr, 4);
current->m = timelib_get_nr((char **) &ptr, 2);
current->d = timelib_get_nr((char **) &ptr, 2);
current->h = timelib_get_nr((char **) &ptr, 2);
current->i = timelib_get_nr((char **) &ptr, 2);
current->s = timelib_get_nr((char **) &ptr, 2);
s->have_date = 1;
TIMELIB_DEINIT;
return TIMELIB_ISO_DATE;
}
period
{
timelib_sll nr;
int in_time = 0;
DEBUG_OUTPUT("period");
TIMELIB_INIT;
ptr++;
do {
if ( *ptr == 'T' ) {
in_time = 1;
ptr++;
}
if ( *ptr == '\0' ) {
add_error(s, "Missing expected time part");
break;
}
nr = timelib_get_unsigned_nr((char **) &ptr, 12);
switch (*ptr) {
case 'Y': s->period->y = nr; break;
case 'W': s->period->d = nr * 7; break;
case 'D': s->period->d = nr; break;
case 'H': s->period->h = nr; break;
case 'S': s->period->s = nr; break;
case 'M':
if (in_time) {
s->period->i = nr;
} else {
s->period->m = nr;
}
break;
default:
add_error(s, "Undefined period specifier");
break;
}
ptr++;
} while (!s->errors->error_count && *ptr);
s->have_period = 1;
TIMELIB_DEINIT;
return TIMELIB_PERIOD;
}
combinedrep
{
DEBUG_OUTPUT("combinedrep");
TIMELIB_INIT;
s->period->y = timelib_get_unsigned_nr((char **) &ptr, 4);
ptr++;
s->period->m = timelib_get_unsigned_nr((char **) &ptr, 2);
ptr++;
s->period->d = timelib_get_unsigned_nr((char **) &ptr, 2);
ptr++;
s->period->h = timelib_get_unsigned_nr((char **) &ptr, 2);
ptr++;
s->period->i = timelib_get_unsigned_nr((char **) &ptr, 2);
ptr++;
s->period->s = timelib_get_unsigned_nr((char **) &ptr, 2);
s->have_period = 1;
TIMELIB_DEINIT;
return TIMELIB_PERIOD;
}
[ .,\t/]
{
goto std;
}
"\000"|"\n"
{
s->pos = cursor; s->line++;
goto std;
}
any
{
add_error(s, "Unexpected character");
goto std;
}
*/
}
#ifdef PHP_WIN32
#pragma optimize( "", on )
#endif
/*!max:re2c */
void timelib_strtointerval(char *s, size_t len,
timelib_time **begin, timelib_time **end,
timelib_rel_time **period, int *recurrences,
struct timelib_error_container **errors)
{
Scanner in;
int t;
char *e = s + len - 1;
memset(&in, 0, sizeof(in));
in.errors = timelib_malloc(sizeof(struct timelib_error_container));
in.errors->warning_count = 0;
in.errors->warning_messages = NULL;
in.errors->error_count = 0;
in.errors->error_messages = NULL;
if (len > 0) {
while (isspace(*s) && s < e) {
s++;
}
while (isspace(*e) && e > s) {
e--;
}
}
if (e - s < 0) {
add_error(&in, "Empty string");
if (errors) {
*errors = in.errors;
} else {
timelib_error_container_dtor(in.errors);
}
return;
}
e++;
/* init cursor */
in.str = timelib_malloc((e - s) + YYMAXFILL);
memset(in.str, 0, (e - s) + YYMAXFILL);
memcpy(in.str, s, (e - s));
in.lim = in.str + (e - s) + YYMAXFILL;
in.cur = in.str;
/* init value containers */
in.begin = timelib_time_ctor();
in.begin->y = TIMELIB_UNSET;
in.begin->d = TIMELIB_UNSET;
in.begin->m = TIMELIB_UNSET;
in.begin->h = TIMELIB_UNSET;
in.begin->i = TIMELIB_UNSET;
in.begin->s = TIMELIB_UNSET;
in.begin->f = 0;
in.begin->z = 0;
in.begin->dst = 0;
in.begin->is_localtime = 0;
in.begin->zone_type = TIMELIB_ZONETYPE_OFFSET;
in.end = timelib_time_ctor();
in.end->y = TIMELIB_UNSET;
in.end->d = TIMELIB_UNSET;
in.end->m = TIMELIB_UNSET;
in.end->h = TIMELIB_UNSET;
in.end->i = TIMELIB_UNSET;
in.end->s = TIMELIB_UNSET;
in.end->f = 0;
in.end->z = 0;
in.end->dst = 0;
in.end->is_localtime = 0;
in.end->zone_type = TIMELIB_ZONETYPE_OFFSET;
in.period = timelib_rel_time_ctor();
in.period->y = 0;
in.period->d = 0;
in.period->m = 0;
in.period->h = 0;
in.period->i = 0;
in.period->s = 0;
in.period->weekday = 0;
in.period->weekday_behavior = 0;
in.period->first_last_day_of = 0;
in.period->days = TIMELIB_UNSET;
in.recurrences = 1;
do {
t = scan(&in);
#ifdef DEBUG_PARSER
printf("%d\n", t);
#endif
} while(t != EOI);
timelib_free(in.str);
if (errors) {
*errors = in.errors;
} else {
timelib_error_container_dtor(in.errors);
}
if (in.have_begin_date) {
*begin = in.begin;
} else {
timelib_time_dtor(in.begin);
}
if (in.have_end_date) {
*end = in.end;
} else {
timelib_time_dtor(in.end);
}
if (in.have_period) {
*period = in.period;
} else {
timelib_rel_time_dtor(in.period);
}
if (in.have_recurrences) {
*recurrences = in.recurrences;
}
}
/*
* vim: syntax=c
*/