tep_read_number(3) — Справочная страница Linux

LIBTRACEEVENT(3)          libtraceevent Manual          LIBTRACEEVENT(3)

НАЗВАНИЕ

       tep_read_number - Reads a number from raw data.

СИНТАКСИС

       #include <event-parse.h>

       unsigned long long tep_read_number(struct tep_handle *tep, const void *ptr, int size);

ОПИСАНИЕ

       The tep_read_number() function reads an integer from raw data,
       taking into account the endianness of the raw data and the
       current host. The tep argument is the trace event parser context.
       The ptr is a pointer to the raw data, where the integer is, and
       the size is the size of the integer.

ЗНАЧЕНИЕ, ВОЗВРАЩАЕМОЕ ФУНКЦИЕЙ

       The tep_read_number() function returns the integer in the byte
       order of the current host. In case of an error, 0 is returned.

ПРИМЕР

           #include <event-parse.h>
           ...
           struct tep_handle *tep = tep_alloc();
           ...
           void process_record(struct tep_record *record)
           {
                   int offset = 24;
                   int data = tep_read_number(tep, record->data + offset, 4);

                   /* Read the 4 bytes at the offset 24 of data as an integer */
           }
           ...

ФАЙЛЫ

           event-parse.h
                   Header file to include in order to have access to the library APIs.
           -ltraceevent
                   Linker switch to add when building a program that uses the library.

СМОТРИ ТАКЖЕ

       libtraceevent(3), trace-cmd(1)

АВТОР

           Steven Rostedt <rostedt@goodmis.org[1]>, author of libtraceevent.
           Tzvetomir Stoyanov <tz.stoyanov@gmail.com[2]>, author of this man page.

СООБЩЕНИЕ ОБ ОШИБКАХ

       Report bugs to <linux-trace-devel@vger.kernel.org[3]>

ЛИЦЕНЗИЯ

       libtraceevent is Free Software licensed under the GNU LGPL 2.1

РЕСУРСЫ

       https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/ 

ЗАМЕЧАНИЯ

        1. rostedt@goodmis.org
           mailto:rostedt@goodmis.org

        2. tz.stoyanov@gmail.com
           mailto:tz.stoyanov@gmail.com

        3. linux-trace-devel@vger.kernel.org
           mailto:linux-trace-devel@vger.kernel.org

КОЛОФОН

       This page is part of the libtraceevent (Linux kernel trace event
       library) project.  Information about the project can be found at
       ⟨https://www.trace-cmd.org/⟩.  If you have a bug report for this
       manual page, see ⟨https://www.trace-cmd.org/⟩.  This page was
       obtained from the project's upstream Git repository
       ⟨https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git⟩
       on 2024-06-14.  (At that time, the date of the most recent commit
       that was found in the repository was 2024-05-17.)  If you
       discover any rendering problems in this HTML version of the page,
       or you believe there is a better or more up-to-date source for
       the page, or you have corrections or improvements to the
       information in this COLOPHON (which is not part of the original
       manual page), send a mail to man-pages@man7.org

libtraceevent 1.7.3            09/24/2023               LIBTRACEEVENT(3)