mirror of
https://github.com/golang/go
synced 2024-11-22 02:04:40 -07:00
47 lines
1.5 KiB
C
47 lines
1.5 KiB
C
|
/*
|
||
|
|
http://code.google.com/p/inferno-os/source/browse/libbio/bbuffered.c
|
||
|
|
|
||
|
|
Copyright © 1994-1999 Lucent Technologies Inc. All rights reserved.
|
||
|
|
Revisions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com). All rights reserved.
|
||
|
|
|
||
|
|
Permission is hereby granted, free of charge, to any person obtaining a copy
|
||
|
|
of this software and associated documentation files (the "Software"), to deal
|
||
|
|
in the Software without restriction, including without limitation the rights
|
||
|
|
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||
|
|
copies of the Software, and to permit persons to whom the Software is
|
||
|
|
furnished to do so, subject to the following conditions:
|
||
|
|
|
||
|
|
The above copyright notice and this permission notice shall be included in
|
||
|
|
all copies or substantial portions of the Software.
|
||
|
|
|
||
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||
|
|
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||
|
|
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||
|
|
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||
|
|
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||
|
|
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||
|
|
THE SOFTWARE.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <u.h>
|
||
|
|
#include <libc.h>
|
||
|
|
#include <bio.h>
|
||
|
|
|
||
|
|
int
|
||
|
|
Bbuffered(Biobuf *bp)
|
||
|
|
{
|
||
|
|
switch(bp->state) {
|
||
|
|
case Bracteof:
|
||
|
|
case Bractive:
|
||
|
|
return -bp->icount;
|
||
|
|
|
||
|
|
case Bwactive:
|
||
|
|
return bp->bsize + bp->ocount;
|
||
|
|
|
||
|
|
case Binactive:
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
fprint(2, "Bbuffered: unknown state %d\n", bp->state);
|
||
|
|
return 0;
|
||
|
|
}
|