| libtraceevent(3) |
| ================ |
| |
| NAME |
| ---- |
| tep_read_number - Reads a number from raw data. |
| |
| SYNOPSIS |
| -------- |
| [verse] |
| -- |
| *#include <event-parse.h>* |
| |
| unsigned long long *tep_read_number*(struct tep_handle pass:[*]_tep_, const void pass:[*]_ptr_, int _size_); |
| -- |
| |
| DESCRIPTION |
| ----------- |
| 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. |
| |
| RETURN VALUE |
| ------------ |
| The _tep_read_number()_ function returns the integer in the byte order of |
| the current host. In case of an error, 0 is returned. |
| |
| EXAMPLE |
| ------- |
| [source,c] |
| -- |
| #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 */ |
| } |
| ... |
| -- |
| |
| FILES |
| ----- |
| [verse] |
| -- |
| *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 |
| ------ |
| [verse] |
| -- |
| *Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*. |
| *Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page. |
| -- |
| REPORTING BUGS |
| -------------- |
| Report bugs to <linux-trace-devel@vger.kernel.org> |
| |
| LICENSE |
| ------- |
| libtraceevent is Free Software licensed under the GNU LGPL 2.1 |
| |
| RESOURCES |
| --------- |
| https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git |
