'\" t
.\"     Title: libtraceevent
.\"    Author: [see the "AUTHOR" section]
.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
.\"      Date: 03/03/2025
.\"    Manual: libtraceevent Manual
.\"    Source: libtraceevent 1.8.4
.\"  Language: English
.\"
.TH "LIBTRACEEVENT" "3" "03/03/2025" "libtraceevent 1\&.8\&.4" "libtraceevent Manual"
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.nh
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.\" * MAIN CONTENT STARTS HERE *
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.SH "NAME"
tep_is_bigendian, tep_is_local_bigendian, tep_set_local_bigendian \- Get / set the endianness of the local machine\&.
.SH "SYNOPSIS"
.sp
.nf
\fB#include <event\-parse\&.h>\fR

enum \fBtep_endian\fR {
        TEP_LITTLE_ENDIAN = 0,
        TEP_BIG_ENDIAN
};

int \fBtep_is_bigendian\fR(void);
bool \fBtep_is_local_bigendian\fR(struct tep_handle *\fItep\fR);
void \fBtep_set_local_bigendian\fR(struct tep_handle *\fItep\fR, enum tep_endian \fIendian\fR);
.fi
.SH "DESCRIPTION"
.sp
The \fBtep_is_bigendian()\fR gets the endianness of the machine, executing the function\&.
.sp
The \fBtep_is_local_bigendian()\fR function gets the endianness of the local machine, saved in the \fItep\fR handler\&. The \fItep\fR argument is the trace event parser context\&. This API is a bit faster than \fBtep_is_bigendian()\fR, as it returns cached endianness of the local machine instead of checking it each time\&.
.sp
The \fBtep_set_local_bigendian()\fR function sets the endianness of the local machine in the \fItep\fR handler\&. The \fItep\fR argument is trace event parser context\&. The \fIendian\fR argument is the endianness:
.sp
.if n \{\
.RS 4
.\}
.nf
        \fITEP_LITTLE_ENDIAN\fR \- the machine is little endian,
        \fITEP_BIG_ENDIAN\fR \- the machine is big endian\&.
.fi
.if n \{\
.RE
.\}
.SH "RETURN VALUE"
.sp
The \fBtep_is_bigendian()\fR function returns non zero if the endianness of the machine, executing the code, is big endian and zero otherwise\&.
.sp
The \fBtep_is_local_bigendian()\fR function returns true, if the endianness of the local machine, saved in the \fItep\fR handler, is big endian, or false otherwise\&.
.SH "EXAMPLE"
.sp
.if n \{\
.RS 4
.\}
.nf
#include <event\-parse\&.h>
\&.\&.\&.
struct tep_handle *tep = tep_alloc();
\&.\&.\&.
        if (tep_is_bigendian())
                tep_set_local_bigendian(tep, TEP_BIG_ENDIAN);
        else
                tep_set_local_bigendian(tep, TEP_LITTLE_ENDIAN);
\&.\&.\&.
        if (tep_is_local_bigendian(tep))
                printf("This machine you are running on is bigendian\en");
        else
                printf("This machine you are running on is little endian\en");
.fi
.if n \{\
.RE
.\}
.SH "FILES"
.sp
.if n \{\
.RS 4
.\}
.nf
\fBevent\-parse\&.h\fR
        Header file to include in order to have access to the library APIs\&.
\fB\-ltraceevent\fR
        Linker switch to add when building a program that uses the library\&.
.fi
.if n \{\
.RE
.\}
.SH "SEE ALSO"
.sp
\fBlibtraceevent\fR(3), \fBtrace\-cmd\fR(1)
.SH "AUTHOR"
.sp
.if n \{\
.RS 4
.\}
.nf
\fBSteven Rostedt\fR <\m[blue]\fBrostedt@goodmis\&.org\fR\m[]\&\s-2\u[1]\d\s+2>, author of \fBlibtraceevent\fR\&.
\fBTzvetomir Stoyanov\fR <\m[blue]\fBtz\&.stoyanov@gmail\&.com\fR\m[]\&\s-2\u[2]\d\s+2>, author of this man page\&.
.fi
.if n \{\
.RE
.\}
.SH "REPORTING BUGS"
.sp
Report bugs to <\m[blue]\fBlinux\-trace\-devel@vger\&.kernel\&.org\fR\m[]\&\s-2\u[3]\d\s+2>
.SH "LICENSE"
.sp
libtraceevent is Free Software licensed under the GNU LGPL 2\&.1
.SH "RESOURCES"
.sp
\m[blue]\fBhttps://git\&.kernel\&.org/pub/scm/libs/libtrace/libtraceevent\&.git/\fR\m[]
.SH "NOTES"
.IP " 1." 4
rostedt@goodmis.org
.RS 4
\%mailto:rostedt@goodmis.org
.RE
.IP " 2." 4
tz.stoyanov@gmail.com
.RS 4
\%mailto:tz.stoyanov@gmail.com
.RE
.IP " 3." 4
linux-trace-devel@vger.kernel.org
.RS 4
\%mailto:linux-trace-devel@vger.kernel.org
.RE
