LIBTRACEEVENT(3)             libtraceevent Manual             LIBTRACEEVENT(3)

NAME
       tep_read_number_field - Reads a number from raw data.

SYNOPSIS
       #include <event-parse.h>

       int tep_read_number_field(struct tep_format_field *field, const void *data, unsigned long long *value);

DESCRIPTION
       The tep_read_number_field() function reads the value of the field from
       the raw data and stores it in the value. The function sets the value
       according to the endianness of the raw data and the current machine and
       stores it in value.

RETURN VALUE
       The tep_read_number_field() function retunrs 0 in case of success, or
       -1 in case of an error.

EXAMPLE
           #include <event-parse.h>
           ...
           struct tep_handle *tep = tep_alloc();
           ...
           struct tep_event *event = tep_find_event_by_name(tep, "timer", "hrtimer_start");
           ...
           void process_record(struct tep_record *record)
           {
                   unsigned long long pid;
                   struct tep_format_field *field_pid = tep_find_common_field(event, "common_pid");

                   if (tep_read_number_field(field_pid, record->data, &pid) != 0) {
                           /* Failed to get "common_pid" value */
                   }
           }
           ...

FILES
           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.

SEE ALSO
       libtraceevent(3), trace-cmd(1)

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

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

LICENSE
       libtraceevent is Free Software licensed under the GNU LGPL 2.1

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

NOTES
        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

libtraceevent                     01/13/2024                  LIBTRACEEVENT(3)