---
name: "tep_read_number"
section: "3"
platform: "linux"
package: "libtraceevent"
version: "1:1.9.1-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/tep_read_number"
---

# tep\_read\_number(3)

Reads a number from raw data.

## NAME

tep\_read\_number - Reads a number from raw data.

## SYNOPSIS

```
#include <event-parse.h>
unsigned long long tep_read_number(struct tep_handle *tep, const void *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

```
#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

```
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)](/libtraceevent/3.md), [**trace-cmd**(1)](/trace-cmd/1.md)

## 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