79 lines
1.7 KiB
Plaintext
79 lines
1.7 KiB
Plaintext
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libtraceevent(3)
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================
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NAME
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----
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tep_read_number - Reads a number from raw data.
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SYNOPSIS
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--------
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[verse]
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--
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*#include <event-parse.h>*
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unsigned long long *tep_read_number*(struct tep_handle pass:[*]_tep_, const void pass:[*]_ptr_, int _size_);
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--
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DESCRIPTION
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-----------
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The _tep_read_number()_ function reads an integer from raw data, taking into
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account the endianness of the raw data and the current host. The _tep_ argument
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is the trace event parser context. The _ptr_ is a pointer to the raw data, where
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the integer is, and the _size_ is the size of the integer.
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RETURN VALUE
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------------
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The _tep_read_number()_ function returns the integer in the byte order of
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the current host. In case of an error, 0 is returned.
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EXAMPLE
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-------
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[source,c]
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--
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#include <event-parse.h>
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...
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struct tep_handle *tep = tep_alloc();
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...
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void process_record(struct tep_record *record)
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{
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int offset = 24;
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int data = tep_read_number(tep, record->data + offset, 4);
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/* Read the 4 bytes at the offset 24 of data as an integer */
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}
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...
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--
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FILES
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-----
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[verse]
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--
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*event-parse.h*
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Header file to include in order to have access to the library APIs.
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*-ltraceevent*
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Linker switch to add when building a program that uses the library.
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--
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SEE ALSO
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--------
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_libtraceevent(3)_, _trace-cmd(1)_
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AUTHOR
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------
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[verse]
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--
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*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
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*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
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--
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REPORTING BUGS
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--------------
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Report bugs to <linux-trace-devel@vger.kernel.org>
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LICENSE
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-------
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libtraceevent is Free Software licensed under the GNU LGPL 2.1
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RESOURCES
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---------
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https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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