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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-28 07:25:46 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-28 07:25:46 +0000 |
commit | 5277429a362a9cf4ce649557bf4c8fe0e20c05c0 (patch) | |
tree | 52cc97728c6fbb7393984dc3db05c5836107fe44 /Documentation/libtraceevent-endian_read.txt | |
parent | Initial commit. (diff) | |
download | libtraceevent-5277429a362a9cf4ce649557bf4c8fe0e20c05c0.tar.xz libtraceevent-5277429a362a9cf4ce649557bf4c8fe0e20c05c0.zip |
Adding upstream version 1:1.7.1.upstream/1%1.7.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | Documentation/libtraceevent-endian_read.txt | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/Documentation/libtraceevent-endian_read.txt b/Documentation/libtraceevent-endian_read.txt new file mode 100644 index 0000000..372d52a --- /dev/null +++ b/Documentation/libtraceevent-endian_read.txt @@ -0,0 +1,78 @@ +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/libs/libtrace/libtraceevent.git/ |