// Copyright 2021 The Gitea Authors. All rights reserved.// SPDX-License-Identifier: MITpackage utilimport ( "errors" "io")// ReadAtMost reads at most len(buf) bytes from r into buf.// It returns the number of bytes copied. n is only less than len(buf) if r provides fewer bytes.// If EOF or ErrUnexpectedEOF occurs while reading, err will be nil.func ReadAtMost(r io.Reader, buf []byte) (n int, err error) { n, err = io.ReadFull(r, buf) if err == io.EOF || err == io.ErrUnexpectedEOF { err = nil } return n, err}// ErrNotEmpty is an error reported when there is a non-empty readervar ErrNotEmpty = errors.New("not-empty")// IsEmptyReader reads a reader and ensures it is emptyfunc IsEmptyReader(r io.Reader) (err error) { var buf [1]byte for { n, err := r.Read(buf[:]) if err != nil { if err == io.EOF { return nil } return err } if n > 0 { return ErrNotEmpty } }}
// Copyright 2021 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package util
import (
"errors"
"io"
)
// ReadAtMost reads at most len(buf) bytes from r into buf.
// It returns the number of bytes copied. n is only less than len(buf) if r provides fewer bytes.
// If EOF or ErrUnexpectedEOF occurs while reading, err will be nil.
func ReadAtMost(r io.Reader, buf []byte) (n int, err error) {
n, err = io.ReadFull(r, buf)
if err == io.EOF || err == io.ErrUnexpectedEOF {
err = nil
}
return n, err
}
// ErrNotEmpty is an error reported when there is a non-empty reader
var ErrNotEmpty = errors.New("not-empty")
// IsEmptyReader reads a reader and ensures it is empty
func IsEmptyReader(r io.Reader) (err error) {
var buf [1]byte
for {
n, err := r.Read(buf[:])
if err != nil {
if err == io.EOF {
return nil
}
return err
}
if n > 0 {
return ErrNotEmpty
}
}
}