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// Copyright 2015 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package collector
import (
"bytes"
"io/ioutil"
"strconv"
"strings"
)
func readUintFromFile(path string) (uint64, error) {
data, err := ioutil.ReadFile(path)
if err != nil {
return 0, err
}
value, err := strconv.ParseUint(strings.TrimSpace(string(data)), 10, 64)
if err != nil {
return 0, err
}
return value, nil
}
// Take a []byte{} and return a string based on null termination.
// This is useful for situations where the OS has returned a null terminated
// string to use.
// If this function happens to receive a byteArray that contains no nulls, we
// simply convert the array to a string with no bounding.
func bytesToString(byteArray []byte) string {
n := bytes.IndexByte(byteArray, 0)
if n < 0 {
return string(byteArray)
}
return string(byteArray[:n])
}
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