Created
April 11, 2015 07:44
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package bench | |
import ( | |
"bufio" | |
"bytes" | |
"errors" | |
"io" | |
"os" | |
"strconv" | |
) | |
func Find(path, s string) (string, error) { | |
if s == "" { | |
return "", errors.New("") | |
} | |
var term []byte = []byte(s) | |
var err error | |
var file *os.File | |
file, err = os.Open(path) | |
defer file.Close() | |
if err != nil { | |
return "", err | |
} | |
var ( | |
r *bufio.Reader = bufio.NewReader(file) | |
line []byte | |
position int | |
i int | |
res bytes.Buffer | |
ln int | |
first bool = true | |
lineLength int | |
sLength int = len(term) | |
) | |
for { | |
line, err = r.ReadBytes('\n') | |
if err == io.EOF { | |
break | |
} | |
ln++ | |
lineLength = len(line) | |
Loop: | |
for position = 0; position < lineLength; position++ { | |
for i = 0; i < sLength; i++ { | |
if term[i] != line[position+i] { | |
continue Loop | |
} | |
} | |
if first { | |
first = false | |
b := make([]byte, 0) | |
b = strconv.AppendInt(b, int64(ln), 10) | |
b = append(b, ':') | |
b = strconv.AppendInt(b, int64(position), 10) | |
res.Write(b) | |
} else { | |
b := make([]byte, 1) | |
b[0] = ',' | |
b = strconv.AppendInt(b, int64(ln), 10) | |
b = append(b, ':') | |
b = strconv.AppendInt(b, int64(position), 10) | |
res.Write(b) | |
} | |
} | |
} | |
return res.String(), nil | |
} |
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