| /* GStreamer |
| * Copyright (C) 2010 Thiago Santos <thiago.sousa.santos@collabora.co.uk> |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public |
| * License along with this library; if not, write to the |
| * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include "glib-compat-private.h" |
| #include "gst_private.h" |
| #include "gstdatetime.h" |
| #include "gstvalue.h" |
| #include <glib.h> |
| #include <math.h> |
| #include <stdio.h> |
| |
| /** |
| * SECTION:gstdatetime |
| * @title: GstDateTime |
| * @short_description: A date, time and timezone structure |
| * |
| * Struct to store date, time and timezone information altogether. |
| * #GstDateTime is refcounted and immutable. |
| * |
| * Date information is handled using the proleptic Gregorian calendar. |
| * |
| * Provides basic creation functions and accessor functions to its fields. |
| */ |
| |
| typedef enum |
| { |
| GST_DATE_TIME_FIELDS_INVALID = 0, |
| GST_DATE_TIME_FIELDS_Y, /* have year */ |
| GST_DATE_TIME_FIELDS_YM, /* have year and month */ |
| GST_DATE_TIME_FIELDS_YMD, /* have year, month and day */ |
| GST_DATE_TIME_FIELDS_YMD_HM, |
| GST_DATE_TIME_FIELDS_YMD_HMS |
| /* Note: if we ever add more granularity here, e.g. for microsecs, |
| * the compare function will need updating */ |
| } GstDateTimeFields; |
| |
| struct _GstDateTime |
| { |
| GDateTime *datetime; |
| |
| GstDateTimeFields fields; |
| volatile gint ref_count; |
| }; |
| |
| /** |
| * gst_date_time_new_from_g_date_time: |
| * @dt: (transfer full): the #GDateTime. The new #GstDateTime takes ownership. |
| * |
| * Creates a new #GstDateTime from a #GDateTime object. |
| * |
| * Free-function: gst_date_time_unref |
| * |
| * Returns: (transfer full): a newly created #GstDateTime, or NULL on error |
| */ |
| GstDateTime * |
| gst_date_time_new_from_g_date_time (GDateTime * dt) |
| { |
| GstDateTime *gst_dt; |
| |
| if (!dt) |
| return NULL; |
| |
| gst_dt = g_slice_new (GstDateTime); |
| gst_dt->datetime = dt; |
| gst_dt->fields = GST_DATE_TIME_FIELDS_YMD_HMS; |
| gst_dt->ref_count = 1; |
| return gst_dt; |
| } |
| |
| /** |
| * gst_date_time_to_g_date_time: |
| * @datetime: GstDateTime. |
| * |
| * Creates a new #GDateTime from a fully defined #GstDateTime object. |
| * |
| * Free-function: g_date_time_unref |
| * |
| * Returns: (transfer full): a newly created #GDateTime, or NULL on error |
| */ |
| GDateTime * |
| gst_date_time_to_g_date_time (GstDateTime * datetime) |
| { |
| g_return_val_if_fail (datetime != NULL, NULL); |
| |
| if (datetime->fields != GST_DATE_TIME_FIELDS_YMD_HMS) |
| return NULL; |
| |
| return g_date_time_add (datetime->datetime, 0); |
| } |
| |
| /** |
| * gst_date_time_has_year: |
| * @datetime: a #GstDateTime |
| * |
| * Returns: TRUE if @datetime<!-- -->'s year field is set (which should always |
| * be the case), otherwise FALSE |
| */ |
| gboolean |
| gst_date_time_has_year (const GstDateTime * datetime) |
| { |
| g_return_val_if_fail (datetime != NULL, FALSE); |
| |
| return (datetime->fields >= GST_DATE_TIME_FIELDS_Y); |
| } |
| |
| /** |
| * gst_date_time_has_month: |
| * @datetime: a #GstDateTime |
| * |
| * Returns: TRUE if @datetime<!-- -->'s month field is set, otherwise FALSE |
| */ |
| gboolean |
| gst_date_time_has_month (const GstDateTime * datetime) |
| { |
| g_return_val_if_fail (datetime != NULL, FALSE); |
| |
| return (datetime->fields >= GST_DATE_TIME_FIELDS_YM); |
| } |
| |
| /** |
| * gst_date_time_has_day: |
| * @datetime: a #GstDateTime |
| * |
| * Returns: TRUE if @datetime<!-- -->'s day field is set, otherwise FALSE |
| */ |
| gboolean |
| gst_date_time_has_day (const GstDateTime * datetime) |
| { |
| g_return_val_if_fail (datetime != NULL, FALSE); |
| |
| return (datetime->fields >= GST_DATE_TIME_FIELDS_YMD); |
| } |
| |
| /** |
| * gst_date_time_has_time: |
| * @datetime: a #GstDateTime |
| * |
| * Returns: TRUE if @datetime<!-- -->'s hour and minute fields are set, |
| * otherwise FALSE |
| */ |
| gboolean |
| gst_date_time_has_time (const GstDateTime * datetime) |
| { |
| g_return_val_if_fail (datetime != NULL, FALSE); |
| |
| return (datetime->fields >= GST_DATE_TIME_FIELDS_YMD_HM); |
| } |
| |
| /** |
| * gst_date_time_has_second: |
| * @datetime: a #GstDateTime |
| * |
| * Returns: TRUE if @datetime<!-- -->'s second field is set, otherwise FALSE |
| */ |
| gboolean |
| gst_date_time_has_second (const GstDateTime * datetime) |
| { |
| g_return_val_if_fail (datetime != NULL, FALSE); |
| |
| return (datetime->fields >= GST_DATE_TIME_FIELDS_YMD_HMS); |
| } |
| |
| /** |
| * gst_date_time_get_year: |
| * @datetime: a #GstDateTime |
| * |
| * Returns the year of this #GstDateTime |
| * Call gst_date_time_has_year before, to avoid warnings. |
| * |
| * Return value: The year of this #GstDateTime |
| */ |
| gint |
| gst_date_time_get_year (const GstDateTime * datetime) |
| { |
| g_return_val_if_fail (datetime != NULL, 0); |
| |
| return g_date_time_get_year (datetime->datetime); |
| } |
| |
| /** |
| * gst_date_time_get_month: |
| * @datetime: a #GstDateTime |
| * |
| * Returns the month of this #GstDateTime. January is 1, February is 2, etc.. |
| * Call gst_date_time_has_month before, to avoid warnings. |
| * |
| * Return value: The month of this #GstDateTime |
| */ |
| gint |
| gst_date_time_get_month (const GstDateTime * datetime) |
| { |
| g_return_val_if_fail (datetime != NULL, 0); |
| g_return_val_if_fail (gst_date_time_has_month (datetime), 0); |
| |
| return g_date_time_get_month (datetime->datetime); |
| } |
| |
| /** |
| * gst_date_time_get_day: |
| * @datetime: a #GstDateTime |
| * |
| * Returns the day of the month of this #GstDateTime. |
| * Call gst_date_time_has_day before, to avoid warnings. |
| * |
| * Return value: The day of this #GstDateTime |
| */ |
| gint |
| gst_date_time_get_day (const GstDateTime * datetime) |
| { |
| g_return_val_if_fail (datetime != NULL, 0); |
| g_return_val_if_fail (gst_date_time_has_day (datetime), 0); |
| |
| return g_date_time_get_day_of_month (datetime->datetime); |
| } |
| |
| /** |
| * gst_date_time_get_hour: |
| * @datetime: a #GstDateTime |
| * |
| * Retrieves the hour of the day represented by @datetime in the gregorian |
| * calendar. The return is in the range of 0 to 23. |
| * Call gst_date_time_has_haur before, to avoid warnings. |
| * |
| * Return value: the hour of the day |
| */ |
| gint |
| gst_date_time_get_hour (const GstDateTime * datetime) |
| { |
| g_return_val_if_fail (datetime != NULL, 0); |
| g_return_val_if_fail (gst_date_time_has_time (datetime), 0); |
| |
| return g_date_time_get_hour (datetime->datetime); |
| } |
| |
| /** |
| * gst_date_time_get_minute: |
| * @datetime: a #GstDateTime |
| * |
| * Retrieves the minute of the hour represented by @datetime in the gregorian |
| * calendar. |
| * Call gst_date_time_has_minute before, to avoid warnings. |
| * |
| * Return value: the minute of the hour |
| */ |
| gint |
| gst_date_time_get_minute (const GstDateTime * datetime) |
| { |
| g_return_val_if_fail (datetime != NULL, 0); |
| g_return_val_if_fail (gst_date_time_has_time (datetime), 0); |
| |
| return g_date_time_get_minute (datetime->datetime); |
| } |
| |
| /** |
| * gst_date_time_get_second: |
| * @datetime: a #GstDateTime |
| * |
| * Retrieves the second of the minute represented by @datetime in the gregorian |
| * calendar. |
| * Call gst_date_time_has_second before, to avoid warnings. |
| * |
| * Return value: the second represented by @datetime |
| */ |
| gint |
| gst_date_time_get_second (const GstDateTime * datetime) |
| { |
| g_return_val_if_fail (datetime != NULL, 0); |
| g_return_val_if_fail (gst_date_time_has_second (datetime), 0); |
| |
| return g_date_time_get_second (datetime->datetime); |
| } |
| |
| /** |
| * gst_date_time_get_microsecond: |
| * @datetime: a #GstDateTime |
| * |
| * Retrieves the fractional part of the seconds in microseconds represented by |
| * @datetime in the gregorian calendar. |
| * |
| * Return value: the microsecond of the second |
| */ |
| gint |
| gst_date_time_get_microsecond (const GstDateTime * datetime) |
| { |
| g_return_val_if_fail (datetime != NULL, 0); |
| g_return_val_if_fail (gst_date_time_has_second (datetime), 0); |
| |
| return g_date_time_get_microsecond (datetime->datetime); |
| } |
| |
| /** |
| * gst_date_time_get_time_zone_offset: |
| * @datetime: a #GstDateTime |
| * |
| * Retrieves the offset from UTC in hours that the timezone specified |
| * by @datetime represents. Timezones ahead (to the east) of UTC have positive |
| * values, timezones before (to the west) of UTC have negative values. |
| * If @datetime represents UTC time, then the offset is zero. |
| * |
| * Return value: the offset from UTC in hours |
| */ |
| gfloat |
| gst_date_time_get_time_zone_offset (const GstDateTime * datetime) |
| { |
| g_return_val_if_fail (datetime != NULL, 0.0); |
| g_return_val_if_fail (gst_date_time_has_time (datetime), 0.0); |
| |
| return (g_date_time_get_utc_offset (datetime->datetime) / |
| G_USEC_PER_SEC) / 3600.0; |
| } |
| |
| /** |
| * gst_date_time_new_y: |
| * @year: the gregorian year |
| * |
| * Creates a new #GstDateTime using the date and times in the gregorian calendar |
| * in the local timezone. |
| * |
| * @year should be from 1 to 9999. |
| * |
| * Free-function: gst_date_time_unref |
| * |
| * Return value: (transfer full): the newly created #GstDateTime |
| */ |
| GstDateTime * |
| gst_date_time_new_y (gint year) |
| { |
| return gst_date_time_new (0.0, year, -1, -1, -1, -1, -1); |
| } |
| |
| /** |
| * gst_date_time_new_ym: |
| * @year: the gregorian year |
| * @month: the gregorian month |
| * |
| * Creates a new #GstDateTime using the date and times in the gregorian calendar |
| * in the local timezone. |
| * |
| * @year should be from 1 to 9999, @month should be from 1 to 12. |
| * |
| * If value is -1 then all over value will be ignored. For example |
| * if @month == -1, then #GstDateTime will created only for @year. |
| * |
| * Free-function: gst_date_time_unref |
| * |
| * Return value: (transfer full): the newly created #GstDateTime |
| */ |
| GstDateTime * |
| gst_date_time_new_ym (gint year, gint month) |
| { |
| return gst_date_time_new (0.0, year, month, -1, -1, -1, -1); |
| } |
| |
| /** |
| * gst_date_time_new_ymd: |
| * @year: the gregorian year |
| * @month: the gregorian month |
| * @day: the day of the gregorian month |
| * |
| * Creates a new #GstDateTime using the date and times in the gregorian calendar |
| * in the local timezone. |
| * |
| * @year should be from 1 to 9999, @month should be from 1 to 12, @day from |
| * 1 to 31. |
| * |
| * If value is -1 then all over value will be ignored. For example |
| * if @month == -1, then #GstDateTime will created only for @year. If |
| * @day == -1, then #GstDateTime will created for @year and @month and |
| * so on. |
| * |
| * Free-function: gst_date_time_unref |
| * |
| * Return value: (transfer full): the newly created #GstDateTime |
| */ |
| GstDateTime * |
| gst_date_time_new_ymd (gint year, gint month, gint day) |
| { |
| return gst_date_time_new (0.0, year, month, day, -1, -1, -1); |
| } |
| |
| /** |
| * gst_date_time_new_from_unix_epoch_local_time: |
| * @secs: seconds from the Unix epoch |
| * |
| * Creates a new #GstDateTime using the time since Jan 1, 1970 specified by |
| * @secs. The #GstDateTime is in the local timezone. |
| * |
| * Free-function: gst_date_time_unref |
| * |
| * Return value: (transfer full): the newly created #GstDateTime |
| */ |
| GstDateTime * |
| gst_date_time_new_from_unix_epoch_local_time (gint64 secs) |
| { |
| GDateTime *datetime; |
| |
| datetime = g_date_time_new_from_unix_local (secs); |
| return gst_date_time_new_from_g_date_time (datetime); |
| } |
| |
| /** |
| * gst_date_time_new_from_unix_epoch_utc: |
| * @secs: seconds from the Unix epoch |
| * |
| * Creates a new #GstDateTime using the time since Jan 1, 1970 specified by |
| * @secs. The #GstDateTime is in the UTC timezone. |
| * |
| * Free-function: gst_date_time_unref |
| * |
| * Return value: (transfer full): the newly created #GstDateTime |
| */ |
| GstDateTime * |
| gst_date_time_new_from_unix_epoch_utc (gint64 secs) |
| { |
| GstDateTime *datetime; |
| datetime = |
| gst_date_time_new_from_g_date_time (g_date_time_new_from_unix_utc (secs)); |
| return datetime; |
| } |
| |
| static GstDateTimeFields |
| gst_date_time_check_fields (gint * year, gint * month, gint * day, |
| gint * hour, gint * minute, gdouble * seconds) |
| { |
| if (*month == -1) { |
| *month = *day = 1; |
| *hour = *minute = *seconds = 0; |
| return GST_DATE_TIME_FIELDS_Y; |
| } else if (*day == -1) { |
| *day = 1; |
| *hour = *minute = *seconds = 0; |
| return GST_DATE_TIME_FIELDS_YM; |
| } else if (*hour == -1) { |
| *hour = *minute = *seconds = 0; |
| return GST_DATE_TIME_FIELDS_YMD; |
| } else if (*seconds == -1) { |
| *seconds = 0; |
| return GST_DATE_TIME_FIELDS_YMD_HM; |
| } else |
| return GST_DATE_TIME_FIELDS_YMD_HMS; |
| } |
| |
| /** |
| * gst_date_time_new_local_time: |
| * @year: the gregorian year |
| * @month: the gregorian month, or -1 |
| * @day: the day of the gregorian month, or -1 |
| * @hour: the hour of the day, or -1 |
| * @minute: the minute of the hour, or -1 |
| * @seconds: the second of the minute, or -1 |
| * |
| * Creates a new #GstDateTime using the date and times in the gregorian calendar |
| * in the local timezone. |
| * |
| * @year should be from 1 to 9999, @month should be from 1 to 12, @day from |
| * 1 to 31, @hour from 0 to 23, @minutes and @seconds from 0 to 59. |
| * |
| * If @month is -1, then the #GstDateTime created will only contain @year, |
| * and all other fields will be considered not set. |
| * |
| * If @day is -1, then the #GstDateTime created will only contain @year and |
| * @month and all other fields will be considered not set. |
| * |
| * If @hour is -1, then the #GstDateTime created will only contain @year and |
| * @month and @day, and the time fields will be considered not set. In this |
| * case @minute and @seconds should also be -1. |
| * |
| * Free-function: gst_date_time_unref |
| * |
| * Return value: (transfer full): the newly created #GstDateTime |
| */ |
| GstDateTime * |
| gst_date_time_new_local_time (gint year, gint month, gint day, gint hour, |
| gint minute, gdouble seconds) |
| { |
| GstDateTimeFields fields; |
| GstDateTime *datetime; |
| |
| g_return_val_if_fail (year > 0 && year <= 9999, NULL); |
| g_return_val_if_fail ((month > 0 && month <= 12) || month == -1, NULL); |
| g_return_val_if_fail ((day > 0 && day <= 31) || day == -1, NULL); |
| g_return_val_if_fail ((hour >= 0 && hour < 24) || hour == -1, NULL); |
| g_return_val_if_fail ((minute >= 0 && minute < 60) || minute == -1, NULL); |
| g_return_val_if_fail ((seconds >= 0 && seconds < 60) || seconds == -1, NULL); |
| |
| fields = gst_date_time_check_fields (&year, &month, &day, |
| &hour, &minute, &seconds); |
| |
| datetime = gst_date_time_new_from_g_date_time (g_date_time_new_local (year, |
| month, day, hour, minute, seconds)); |
| |
| datetime->fields = fields; |
| return datetime; |
| } |
| |
| /** |
| * gst_date_time_new_now_local_time: |
| * |
| * Creates a new #GstDateTime representing the current date and time. |
| * |
| * Free-function: gst_date_time_unref |
| * |
| * Return value: (transfer full): the newly created #GstDateTime which should |
| * be freed with gst_date_time_unref(). |
| */ |
| GstDateTime * |
| gst_date_time_new_now_local_time (void) |
| { |
| return gst_date_time_new_from_g_date_time (g_date_time_new_now_local ()); |
| } |
| |
| /** |
| * gst_date_time_new_now_utc: |
| * |
| * Creates a new #GstDateTime that represents the current instant at Universal |
| * coordinated time. |
| * |
| * Free-function: gst_date_time_unref |
| * |
| * Return value: (transfer full): the newly created #GstDateTime which should |
| * be freed with gst_date_time_unref(). |
| */ |
| GstDateTime * |
| gst_date_time_new_now_utc (void) |
| { |
| return gst_date_time_new_from_g_date_time (g_date_time_new_now_utc ()); |
| } |
| |
| gint |
| __gst_date_time_compare (const GstDateTime * dt1, const GstDateTime * dt2) |
| { |
| gint64 diff; |
| |
| /* we assume here that GST_DATE_TIME_FIELDS_YMD_HMS is the highest |
| * resolution, and ignore microsecond differences on purpose for now */ |
| if (dt1->fields != dt2->fields) |
| return GST_VALUE_UNORDERED; |
| |
| /* This will round down to nearest second, which is what we want. We're |
| * not comparing microseconds on purpose here, since we're not |
| * serialising them when doing new_utc_now() + to_string() */ |
| diff = |
| g_date_time_to_unix (dt1->datetime) - g_date_time_to_unix (dt2->datetime); |
| if (diff < 0) |
| return GST_VALUE_LESS_THAN; |
| else if (diff > 0) |
| return GST_VALUE_GREATER_THAN; |
| else |
| return GST_VALUE_EQUAL; |
| } |
| |
| /** |
| * gst_date_time_new: |
| * @tzoffset: Offset from UTC in hours. |
| * @year: the gregorian year |
| * @month: the gregorian month |
| * @day: the day of the gregorian month |
| * @hour: the hour of the day |
| * @minute: the minute of the hour |
| * @seconds: the second of the minute |
| * |
| * Creates a new #GstDateTime using the date and times in the gregorian calendar |
| * in the supplied timezone. |
| * |
| * @year should be from 1 to 9999, @month should be from 1 to 12, @day from |
| * 1 to 31, @hour from 0 to 23, @minutes and @seconds from 0 to 59. |
| * |
| * Note that @tzoffset is a float and was chosen so for being able to handle |
| * some fractional timezones, while it still keeps the readability of |
| * represeting it in hours for most timezones. |
| * |
| * If value is -1 then all over value will be ignored. For example |
| * if @month == -1, then #GstDateTime will created only for @year. If |
| * @day == -1, then #GstDateTime will created for @year and @month and |
| * so on. |
| * |
| * Free-function: gst_date_time_unref |
| * |
| * Return value: (transfer full): the newly created #GstDateTime |
| */ |
| GstDateTime * |
| gst_date_time_new (gfloat tzoffset, gint year, gint month, gint day, gint hour, |
| gint minute, gdouble seconds) |
| { |
| GstDateTimeFields fields; |
| gchar buf[6]; |
| GTimeZone *tz; |
| GDateTime *dt; |
| GstDateTime *datetime; |
| gint tzhour, tzminute; |
| |
| g_return_val_if_fail (year > 0 && year <= 9999, NULL); |
| g_return_val_if_fail ((month > 0 && month <= 12) || month == -1, NULL); |
| g_return_val_if_fail ((day > 0 && day <= 31) || day == -1, NULL); |
| g_return_val_if_fail ((hour >= 0 && hour < 24) || hour == -1, NULL); |
| g_return_val_if_fail ((minute >= 0 && minute < 60) || minute == -1, NULL); |
| g_return_val_if_fail ((seconds >= 0 && seconds < 60) || seconds == -1, NULL); |
| g_return_val_if_fail (tzoffset >= -12.0 && tzoffset <= 12.0, NULL); |
| g_return_val_if_fail ((hour >= 0 && minute >= 0) || |
| (hour == -1 && minute == -1 && seconds == -1 && tzoffset == 0.0), NULL); |
| |
| tzhour = (gint) ABS (tzoffset); |
| tzminute = (gint) ((ABS (tzoffset) - tzhour) * 60); |
| |
| g_snprintf (buf, 6, "%c%02d%02d", tzoffset >= 0 ? '+' : '-', tzhour, |
| tzminute); |
| |
| tz = g_time_zone_new (buf); |
| |
| fields = gst_date_time_check_fields (&year, &month, &day, |
| &hour, &minute, &seconds); |
| |
| dt = g_date_time_new (tz, year, month, day, hour, minute, seconds); |
| g_time_zone_unref (tz); |
| |
| datetime = gst_date_time_new_from_g_date_time (dt); |
| datetime->fields = fields; |
| |
| return datetime; |
| } |
| |
| gchar * |
| __gst_date_time_serialize (GstDateTime * datetime, gboolean serialize_usecs) |
| { |
| GString *s; |
| gfloat gmt_offset; |
| guint msecs; |
| |
| /* we always have at least the year */ |
| s = g_string_new (NULL); |
| g_string_append_printf (s, "%04u", gst_date_time_get_year (datetime)); |
| |
| if (datetime->fields == GST_DATE_TIME_FIELDS_Y) |
| goto done; |
| |
| /* add month */ |
| g_string_append_printf (s, "-%02u", gst_date_time_get_month (datetime)); |
| |
| if (datetime->fields == GST_DATE_TIME_FIELDS_YM) |
| goto done; |
| |
| /* add day of month */ |
| g_string_append_printf (s, "-%02u", gst_date_time_get_day (datetime)); |
| |
| if (datetime->fields == GST_DATE_TIME_FIELDS_YMD) |
| goto done; |
| |
| /* add time */ |
| g_string_append_printf (s, "T%02u:%02u", gst_date_time_get_hour (datetime), |
| gst_date_time_get_minute (datetime)); |
| |
| if (datetime->fields == GST_DATE_TIME_FIELDS_YMD_HM) |
| goto add_timezone; |
| |
| /* add seconds */ |
| g_string_append_printf (s, ":%02u", gst_date_time_get_second (datetime)); |
| |
| /* add microseconds */ |
| if (serialize_usecs) { |
| msecs = gst_date_time_get_microsecond (datetime); |
| if (msecs != 0) { |
| g_string_append_printf (s, ".%06u", msecs); |
| /* trim trailing 0s */ |
| while (s->str[s->len - 1] == '0') |
| g_string_truncate (s, s->len - 1); |
| } |
| } |
| |
| /* add timezone */ |
| |
| add_timezone: |
| |
| gmt_offset = gst_date_time_get_time_zone_offset (datetime); |
| if (gmt_offset == 0) { |
| g_string_append_c (s, 'Z'); |
| } else { |
| guint tzhour, tzminute; |
| |
| tzhour = (guint) ABS (gmt_offset); |
| tzminute = (guint) ((ABS (gmt_offset) - tzhour) * 60); |
| |
| g_string_append_c (s, (gmt_offset >= 0) ? '+' : '-'); |
| g_string_append_printf (s, "%02u%02u", tzhour, tzminute); |
| } |
| |
| done: |
| |
| return g_string_free (s, FALSE); |
| } |
| |
| /** |
| * gst_date_time_to_iso8601_string: |
| * @datetime: GstDateTime. |
| * |
| * Create a minimal string compatible with ISO-8601. Possible output formats |
| * are (for example): 2012, 2012-06, 2012-06-23, 2012-06-23T23:30Z, |
| * 2012-06-23T23:30+0100, 2012-06-23T23:30:59Z, 2012-06-23T23:30:59+0100 |
| * |
| * Returns: a newly allocated string formatted according to ISO 8601 and |
| * only including the datetime fields that are valid, or NULL in case |
| * there was an error. The string should be freed with g_free(). |
| */ |
| gchar * |
| gst_date_time_to_iso8601_string (GstDateTime * datetime) |
| { |
| g_return_val_if_fail (datetime != NULL, NULL); |
| |
| if (datetime->fields == GST_DATE_TIME_FIELDS_INVALID) |
| return NULL; |
| |
| return __gst_date_time_serialize (datetime, FALSE); |
| } |
| |
| /** |
| * gst_date_time_new_from_iso8601_string: |
| * @string: ISO 8601-formatted datetime string. |
| * |
| * Tries to parse common variants of ISO-8601 datetime strings into a |
| * #GstDateTime. |
| * |
| * Free-function: gst_date_time_unref |
| * |
| * Returns: (transfer full): a newly created #GstDateTime, or NULL on error |
| */ |
| GstDateTime * |
| gst_date_time_new_from_iso8601_string (const gchar * string) |
| { |
| gint year = -1, month = -1, day = -1, hour = -1, minute = -1; |
| gdouble second = -1.0; |
| gfloat tzoffset = 0.0; |
| guint64 usecs; |
| gint len, ret; |
| |
| g_return_val_if_fail (string != NULL, NULL); |
| |
| GST_DEBUG ("Parsing '%s' into a datetime", string); |
| |
| len = strlen (string); |
| |
| if (len < 4 || !g_ascii_isdigit (string[0]) || !g_ascii_isdigit (string[1]) |
| || !g_ascii_isdigit (string[2]) || !g_ascii_isdigit (string[3])) |
| return NULL; |
| |
| ret = sscanf (string, "%04d-%02d-%02d", &year, &month, &day); |
| |
| if (ret == 0) |
| return NULL; |
| |
| if (ret == 3 && day <= 0) { |
| ret = 2; |
| day = -1; |
| } |
| |
| if (ret >= 2 && month <= 0) { |
| ret = 1; |
| month = day = -1; |
| } |
| |
| if (ret >= 1 && year <= 0) |
| return NULL; |
| |
| else if (ret >= 1 && len < 16) |
| /* YMD is 10 chars. XMD + HM will be 16 chars. if it is less, |
| * it make no sense to continue. We will stay with YMD. */ |
| goto ymd; |
| |
| string += 10; |
| /* Exit if there is no expeceted value on this stage */ |
| if (!(*string == 'T' || *string == '-' || *string == ' ')) |
| goto ymd; |
| |
| /* if hour or minute fails, then we will use onlly ymd. */ |
| hour = g_ascii_strtoull (string + 1, (gchar **) & string, 10); |
| if (hour > 24 || *string != ':') |
| goto ymd; |
| |
| /* minute */ |
| minute = g_ascii_strtoull (string + 1, (gchar **) & string, 10); |
| if (minute > 59) |
| goto ymd; |
| |
| /* second */ |
| if (*string == ':') { |
| second = g_ascii_strtoull (string + 1, (gchar **) & string, 10); |
| /* if we fail here, we still can reuse hour and minute. We |
| * will still attempt to parse any timezone information */ |
| if (second > 59) { |
| second = -1.0; |
| } else { |
| /* microseconds */ |
| if (*string == '.' || *string == ',') { |
| const gchar *usec_start = string + 1; |
| guint digits; |
| |
| usecs = g_ascii_strtoull (string + 1, (gchar **) & string, 10); |
| if (usecs != G_MAXUINT64 && string > usec_start) { |
| digits = (guint) (string - usec_start); |
| second += (gdouble) usecs / pow (10.0, digits); |
| } |
| } |
| } |
| } |
| |
| if (*string == 'Z') |
| goto ymd_hms; |
| else { |
| /* reuse some code from gst-plugins-base/gst-libs/gst/tag/gstxmptag.c */ |
| gint gmt_offset_hour = -1, gmt_offset_min = -1, gmt_offset = -1; |
| gchar *plus_pos = NULL; |
| gchar *neg_pos = NULL; |
| gchar *pos = NULL; |
| |
| GST_LOG ("Checking for timezone information"); |
| |
| /* check if there is timezone info */ |
| plus_pos = strrchr (string, '+'); |
| neg_pos = strrchr (string, '-'); |
| if (plus_pos) |
| pos = plus_pos + 1; |
| else if (neg_pos) |
| pos = neg_pos + 1; |
| |
| if (pos) { |
| gint ret_tz; |
| if (pos[2] == ':') |
| ret_tz = sscanf (pos, "%d:%d", &gmt_offset_hour, &gmt_offset_min); |
| else |
| ret_tz = sscanf (pos, "%02d%02d", &gmt_offset_hour, &gmt_offset_min); |
| |
| GST_DEBUG ("Parsing timezone: %s", pos); |
| |
| if (ret_tz == 2) { |
| gmt_offset = gmt_offset_hour * 60 + gmt_offset_min; |
| if (neg_pos != NULL && neg_pos + 1 == pos) |
| gmt_offset *= -1; |
| |
| tzoffset = gmt_offset / 60.0; |
| |
| GST_LOG ("Timezone offset: %f (%d minutes)", tzoffset, gmt_offset); |
| } else |
| GST_WARNING ("Failed to parse timezone information"); |
| } |
| } |
| |
| ymd_hms: |
| return gst_date_time_new (tzoffset, year, month, day, hour, minute, second); |
| ymd: |
| return gst_date_time_new_ymd (year, month, day); |
| } |
| |
| |
| static void |
| gst_date_time_free (GstDateTime * datetime) |
| { |
| g_date_time_unref (datetime->datetime); |
| g_slice_free (GstDateTime, datetime); |
| } |
| |
| /** |
| * gst_date_time_ref: |
| * @datetime: a #GstDateTime |
| * |
| * Atomically increments the reference count of @datetime by one. |
| * |
| * Return value: (transfer full): the reference @datetime |
| */ |
| GstDateTime * |
| gst_date_time_ref (GstDateTime * datetime) |
| { |
| g_return_val_if_fail (datetime != NULL, NULL); |
| g_return_val_if_fail (datetime->ref_count > 0, NULL); |
| g_atomic_int_inc (&datetime->ref_count); |
| return datetime; |
| } |
| |
| /** |
| * gst_date_time_unref: |
| * @datetime: (transfer full): a #GstDateTime |
| * |
| * Atomically decrements the reference count of @datetime by one. When the |
| * reference count reaches zero, the structure is freed. |
| */ |
| void |
| gst_date_time_unref (GstDateTime * datetime) |
| { |
| g_return_if_fail (datetime != NULL); |
| g_return_if_fail (datetime->ref_count > 0); |
| |
| if (g_atomic_int_dec_and_test (&datetime->ref_count)) |
| gst_date_time_free (datetime); |
| } |