mirror of
https://github.com/golang/go
synced 2024-11-22 17:24:53 -07:00
4b409289f6
also drop bool arg from ReadString R=r DELTA=45 (13 added, 1 deleted, 31 changed) OCL=33923 CL=33960
122 lines
3.1 KiB
Go
122 lines
3.1 KiB
Go
/*
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of "The Computer Language Benchmarks Game" nor the
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name of "The Computer Language Shootout Benchmarks" nor the names of
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its contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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/* The Computer Language Benchmarks Game
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* http://shootout.alioth.debian.org/
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*
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* contributed by The Go Authors.
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*/
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package main
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import (
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"bufio";
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"bytes";
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"os";
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)
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const lineSize = 60
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var complement = [256]uint8 {
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'A': 'T', 'a': 'T',
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'C': 'G', 'c': 'G',
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'G': 'C', 'g': 'C',
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'T': 'A', 't': 'A',
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'U': 'A', 'u': 'A',
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'M': 'K', 'm': 'K',
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'R': 'Y', 'r': 'Y',
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'W': 'W', 'w': 'W',
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'S': 'S', 's': 'S',
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'Y': 'R', 'y': 'R',
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'K': 'M', 'k': 'M',
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'V': 'B', 'v': 'B',
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'H': 'D', 'h': 'D',
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'D': 'H', 'd': 'H',
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'B': 'V', 'b': 'V',
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'N': 'N', 'n': 'N',
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}
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var in *bufio.Reader
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func reverseComplement(in []byte) []byte {
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outLen := len(in) + (len(in) + lineSize -1)/lineSize;
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out := make([]byte, outLen);
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j := 0;
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k := 0;
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for i := len(in)-1; i >= 0; i-- {
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if k == lineSize {
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out[j] = '\n';
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j++;
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k = 0;
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}
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out[j] = complement[in[i]];
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j++;
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k++;
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}
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out[j] = '\n';
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j++;
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return out[0:j];
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}
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func output(buf []byte) {
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if len(buf) == 0 {
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return
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}
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os.Stdout.Write(reverseComplement(buf));
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}
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func main() {
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in = bufio.NewReader(os.Stdin);
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buf := make([]byte, 100*1024);
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top := 0;
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for {
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line, err := in.ReadSlice('\n');
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if err != nil {
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break
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}
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if line[0] == '>' {
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if top > 0 {
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output(buf[0:top]);
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top = 0;
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}
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os.Stdout.Write(line);
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continue
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}
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line = line[0:len(line)-1]; // drop newline
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if top+len(line) > len(buf) {
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nbuf := make([]byte, 2*len(buf) + 1024*(100+len(line)));
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bytes.Copy(nbuf, buf[0:top]);
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buf = nbuf;
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}
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bytes.Copy(buf[top:len(buf)], line);
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top += len(line);
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}
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output(buf[0:top]);
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}
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