/usr/share/gocode/src/github.com/DCSO/bloom/io.go is in golang-github-dcso-bloom-dev 0.2.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 | // DCSO go bloom filter
// Copyright (c) 2017, DCSO GmbH
package bloom
import (
"bufio"
"bytes"
gz "compress/gzip"
"io"
"os"
)
// LoadFromBytes reads a binary Bloom filter representation from a byte array
// and returns a BloomFilter struct pointer based on it.
// If 'gzip' is true, then compressed input will be expected.
func LoadFromBytes(input []byte, gzip bool) (*BloomFilter, error) {
return LoadFromReader(bytes.NewReader(input), gzip)
}
// LoadFilter reads a binary Bloom filter representation from a file
// and returns a BloomFilter struct pointer based on it.
// If 'gzip' is true, then compressed input will be expected.
func LoadFilter(path string, gzip bool) (*BloomFilter, error) {
file, err := os.Open(path)
if err != nil {
return nil, err
}
defer file.Close()
return LoadFromReader(file, gzip)
}
// LoadFromReader reads a binary Bloom filter representation from an io.Reader
// and returns a BloomFilter struct pointer based on it.
// If 'gzip' is true, then compressed input will be expected.
func LoadFromReader(inReader io.Reader, gzip bool) (*BloomFilter, error) {
var err error
var reader io.Reader
var gzipReader *gz.Reader
var ioReader *bufio.Reader
if gzip {
gzipReader, err = gz.NewReader(inReader)
if err != nil {
return nil, err
}
defer gzipReader.Close()
reader = gzipReader
} else {
ioReader = bufio.NewReader(inReader)
reader = ioReader
}
var filter BloomFilter
if err = filter.Read(reader); err != nil {
return nil, err
}
return &filter, nil
}
// WriteFilter writes a binary Bloom filter representation for a given struct
// to a file. If 'gzip' is true, then a compressed file will be written.
func WriteFilter(filter *BloomFilter, path string, gzip bool) error {
file, err := os.Create(path)
if err != nil {
return err
}
defer file.Close()
file.Seek(0, 0)
var writer io.Writer
var gzipWriter *gz.Writer
var ioWriter *bufio.Writer
if gzip {
gzipWriter = gz.NewWriter(file)
defer gzipWriter.Close()
writer = gzipWriter
} else {
ioWriter = bufio.NewWriter(file)
writer = ioWriter
}
err = filter.Write(writer)
if err != nil {
return err
}
if gzip {
gzipWriter.Flush()
} else {
ioWriter.Flush()
}
file.Sync()
return nil
}
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