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author | rgrimes <rgrimes@FreeBSD.org> | 1994-05-30 19:09:18 +0000 |
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committer | rgrimes <rgrimes@FreeBSD.org> | 1994-05-30 19:09:18 +0000 |
commit | b0d61785cae024b1f44119446a940ee14c9ac959 (patch) | |
tree | 5a495a583b002ae9e57f09848ae697160708c220 /share/man/man3/assert.3 | |
parent | d43599f73ba5858e573c7ad8b284f6a0808c5c93 (diff) | |
download | FreeBSD-src-b0d61785cae024b1f44119446a940ee14c9ac959.zip FreeBSD-src-b0d61785cae024b1f44119446a940ee14c9ac959.tar.gz |
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Diffstat (limited to 'share/man/man3/assert.3')
-rw-r--r-- | share/man/man3/assert.3 | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/share/man/man3/assert.3 b/share/man/man3/assert.3 new file mode 100644 index 0000000..2a9c8f9 --- /dev/null +++ b/share/man/man3/assert.3 @@ -0,0 +1,86 @@ +.\" Copyright (c) 1991, 1993 +.\" The Regents of the University of California. All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" 3. All advertising materials mentioning features or use of this software +.\" must display the following acknowledgement: +.\" This product includes software developed by the University of +.\" California, Berkeley and its contributors. +.\" 4. Neither the name of the University nor the names of its contributors +.\" may be used to endorse or promote products derived from this software +.\" without specific prior written permission. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.\" @(#)assert.3 8.1 (Berkeley) 6/9/93 +.\" +.Dd June 9, 1993 +.Dt ASSERT 3 +.Os +.Sh NAME +.Nm assert +.Nd expression verification macro +.Sh SYNOPSIS +.Fd #include <assert.h> +.Fn assert expression +.Sh DESCRIPTION +The +.Fn assert +macro tests the given +.Ar expression +and if it is false, +the calling process is terminated. +A +diagnostic message is written to the +.Em stderr +and the function +.Xr _exit 2 +is called effectively terminating the program. +.Pp +If +.Ar expression +is true, +the +.Fn assert +macro does nothing. +.Pp +The +.Fn assert +macro +may be removed at compile time with +the +.Fl NDEBUG +option, see +.Xr cc 1 . +.Sh DIAGNOSTICS +The following diagnostic message is written to +.Em stderr +if +.Ar expression +is false: +.Bd -literal -offset indent +"assertion \e"%s\e" failed: file \e"%s\e", line %d\n", \e + "expression", __FILE__, __LINE__); +.Ed +.Sh HISTORY +A +.Nm assert +macro appeared in +.At v6 . |