mirror of
https://github.com/golang/go
synced 2024-10-04 10:11:21 -06:00
79dca0327e
Also introduce BGET2/4, BPUT2/4 as they are widely used. Slightly improve BGETC/BPUTC implementation. This gives ~5% CPU time improvement on go install -a -p1 std. Before: real user sys 0m23.561s 0m16.625s 0m5.848s 0m23.766s 0m16.624s 0m5.846s 0m23.742s 0m16.621s 0m5.868s after: 0m22.999s 0m15.841s 0m5.889s 0m22.845s 0m15.808s 0m5.850s 0m22.889s 0m15.832s 0m5.848s R=golang-dev, r CC=golang-dev https://golang.org/cl/12745047
63 lines
1.6 KiB
C
63 lines
1.6 KiB
C
/*
|
|
http://code.google.com/p/inferno-os/source/browse/libbio/bgetd.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>
|
|
|
|
struct bgetd
|
|
{
|
|
Biobuf* b;
|
|
int eof;
|
|
};
|
|
|
|
static int
|
|
Bgetdf(void *vp)
|
|
{
|
|
int c;
|
|
struct bgetd *bg = vp;
|
|
|
|
c = BGETC(bg->b);
|
|
if(c == Beof)
|
|
bg->eof = 1;
|
|
return c;
|
|
}
|
|
|
|
int
|
|
Bgetd(Biobuf *bp, double *dp)
|
|
{
|
|
double d;
|
|
struct bgetd b;
|
|
|
|
b.b = bp;
|
|
b.eof = 0;
|
|
d = fmtcharstod(Bgetdf, &b);
|
|
if(b.eof)
|
|
return -1;
|
|
Bungetc(bp);
|
|
*dp = d;
|
|
return 1;
|
|
}
|