tor-browser

The Tor Browser
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parseutils.h (4646B)

      1 /*
      2 * This file is part of Libav.
      3 *
      4 * Libav is free software; you can redistribute it and/or
      5 * modify it under the terms of the GNU Lesser General Public
      6 * License as published by the Free Software Foundation; either
      7 * version 2.1 of the License, or (at your option) any later version.
      8 *
      9 * Libav is distributed in the hope that it will be useful,
     10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
     11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     12 * Lesser General Public License for more details.
     13 *
     14 * You should have received a copy of the GNU Lesser General Public
     15 * License along with Libav; if not, write to the Free Software
     16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
     17 */
     18 
     19 #ifndef AVUTIL_PARSEUTILS_H
     20 #define AVUTIL_PARSEUTILS_H
     21 
     22 #include <time.h>
     23 
     24 #include "rational.h"
     25 
     26 /**
     27 * @file
     28 * misc parsing utilities
     29 */
     30 
     31 /**
     32 * Parse str and put in width_ptr and height_ptr the detected values.
     33 *
     34 * @param[in,out] width_ptr pointer to the variable which will contain the detected
     35 * width value
     36 * @param[in,out] height_ptr pointer to the variable which will contain the detected
     37 * height value
     38 * @param[in] str the string to parse: it has to be a string in the format
     39 * width x height or a valid video size abbreviation.
     40 * @return >= 0 on success, a negative error code otherwise
     41 */
     42 int av_parse_video_size(int *width_ptr, int *height_ptr, const char *str);
     43 
     44 /**
     45 * Parse str and store the detected values in *rate.
     46 *
     47 * @param[in,out] rate pointer to the AVRational which will contain the detected
     48 * frame rate
     49 * @param[in] str the string to parse: it has to be a string in the format
     50 * rate_num / rate_den, a float number or a valid video rate abbreviation
     51 * @return >= 0 on success, a negative error code otherwise
     52 */
     53 int av_parse_video_rate(AVRational *rate, const char *str);
     54 
     55 /**
     56 * Put the RGBA values that correspond to color_string in rgba_color.
     57 *
     58 * @param color_string a string specifying a color. It can be the name of
     59 * a color (case insensitive match) or a [0x|#]RRGGBB[AA] sequence,
     60 * possibly followed by "@" and a string representing the alpha
     61 * component.
     62 * The alpha component may be a string composed by "0x" followed by an
     63 * hexadecimal number or a decimal number between 0.0 and 1.0, which
     64 * represents the opacity value (0x00/0.0 means completely transparent,
     65 * 0xff/1.0 completely opaque).
     66 * If the alpha component is not specified then 0xff is assumed.
     67 * The string "random" will result in a random color.
     68 * @param slen length of the initial part of color_string containing the
     69 * color. It can be set to -1 if color_string is a null terminated string
     70 * containing nothing else than the color.
     71 * @return >= 0 in case of success, a negative value in case of
     72 * failure (for example if color_string cannot be parsed).
     73 */
     74 int av_parse_color(uint8_t *rgba_color, const char *color_string, int slen,
     75                   void *log_ctx);
     76 
     77 /**
     78 * Parse timestr and return in *time a corresponding number of
     79 * microseconds.
     80 *
     81 * @param timeval puts here the number of microseconds corresponding
     82 * to the string in timestr. If the string represents a duration, it
     83 * is the number of microseconds contained in the time interval.  If
     84 * the string is a date, is the number of microseconds since 1st of
     85 * January, 1970 up to the time of the parsed date.  If timestr cannot
     86 * be successfully parsed, set *time to INT64_MIN.
     87 
     88 * @param timestr a string representing a date or a duration.
     89 * - If a date the syntax is:
     90 * @code
     91 * [{YYYY-MM-DD|YYYYMMDD}[T|t| ]]{{HH[:MM[:SS[.m...]]]}|{HH[MM[SS[.m...]]]}}[Z]
     92 * now
     93 * @endcode
     94 * If the value is "now" it takes the current time.
     95 * Time is local time unless Z is appended, in which case it is
     96 * interpreted as UTC.
     97 * If the year-month-day part is not specified it takes the current
     98 * year-month-day.
     99 * - If a duration the syntax is:
    100 * @code
    101 * [-]HH[:MM[:SS[.m...]]]
    102 * [-]S+[.m...]
    103 * @endcode
    104 * @param duration flag which tells how to interpret timestr, if not
    105 * zero timestr is interpreted as a duration, otherwise as a date
    106 * @return 0 in case of success, a negative value corresponding to an
    107 * AVERROR code otherwise
    108 */
    109 int av_parse_time(int64_t *timeval, const char *timestr, int duration);
    110 
    111 /**
    112 * Attempt to find a specific tag in a URL.
    113 *
    114 * syntax: '?tag1=val1&tag2=val2...'. Little URL decoding is done.
    115 * Return 1 if found.
    116 */
    117 int av_find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
    118 
    119 /**
    120 * Convert the decomposed UTC time in tm to a time_t value.
    121 */
    122 time_t av_timegm(struct tm *tm);
    123 
    124 #endif /* AVUTIL_PARSEUTILS_H */