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remove bytes.Copy

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replace all calls with calls to copy
use copy in regexp and bytes.Buffer

R=rsc
CC=golang-dev
https://golang.org/cl/157073
This commit is contained in:
Rob Pike 2009-11-18 15:24:24 -08:00
parent 093493c6a5
commit e70cedfaec
22 changed files with 147 additions and 218 deletions
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51
test/bench/reverse-complement.go
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@ -37,39 +37,38 @@ package main
import (
"bufio";
"bytes";
"os";
)
const lineSize = 60
const lineSize = 60
var complement = [256]uint8 {
'A': 'T', 'a': 'T',
'C': 'G', 'c': 'G',
'G': 'C', 'g': 'C',
'T': 'A', 't': 'A',
'U': 'A', 'u': 'A',
'M': 'K', 'm': 'K',
'R': 'Y', 'r': 'Y',
'W': 'W', 'w': 'W',
'S': 'S', 's': 'S',
'Y': 'R', 'y': 'R',
'K': 'M', 'k': 'M',
'V': 'B', 'v': 'B',
'H': 'D', 'h': 'D',
'D': 'H', 'd': 'H',
'B': 'V', 'b': 'V',
'N': 'N', 'n': 'N',
var complement = [256]uint8{
'A': 'T', 'a': 'T',
'C': 'G', 'c': 'G',
'G': 'C', 'g': 'C',
'T': 'A', 't': 'A',
'U': 'A', 'u': 'A',
'M': 'K', 'm': 'K',
'R': 'Y', 'r': 'Y',
'W': 'W', 'w': 'W',
'S': 'S', 's': 'S',
'Y': 'R', 'y': 'R',
'K': 'M', 'k': 'M',
'V': 'B', 'v': 'B',
'H': 'D', 'h': 'D',
'D': 'H', 'd': 'H',
'B': 'V', 'b': 'V',
'N': 'N', 'n': 'N',
}
var in *bufio.Reader
func reverseComplement(in []byte) []byte {
outLen := len(in) + (len(in) + lineSize -1)/lineSize;
outLen := len(in) + (len(in)+lineSize-1)/lineSize;
out := make([]byte, outLen);
j := 0;
k := 0;
for i := len(in)-1; i >= 0; i-- {
for i := len(in) - 1; i >= 0; i-- {
if k == lineSize {
out[j] = '\n';
j++;
@ -106,15 +105,15 @@ func main() {
top = 0;
}
os.Stdout.Write(line);
continue
continue;
}
line = line[0:len(line)-1]; // drop newline
line = line[0 : len(line)-1]; // drop newline
if top+len(line) > len(buf) {
nbuf := make([]byte, 2*len(buf) + 1024*(100+len(line)));
bytes.Copy(nbuf, buf[0:top]);
nbuf := make([]byte, 2*len(buf)+1024*(100+len(line)));
copy(nbuf, buf[0:top]);
buf = nbuf;
}
bytes.Copy(buf[top:len(buf)], line);
copy(buf[top:len(buf)], line);
top += len(line);
}
output(buf[0:top]);