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package iotools
import (
"io"
)
// ReadCloserType implements io.ReadCloser
// by combining the two underlying interfaces,
// while providing an exported type to still
// access the underlying original io.Reader or
// io.Closer separately (e.g. without wrapping).
type ReadCloserType struct {
io.Reader
io.Closer
}
// ReaderFunc is a function signature which allows
// a function to implement the io.Reader type.
type ReaderFunc func([]byte) (int, error)
func (r ReaderFunc) Read(b []byte) (int, error) {
return r(b)
}
// ReaderFromFunc is a function signature which allows
// a function to implement the io.ReaderFrom type.
type ReaderFromFunc func(io.Reader) (int64, error)
func (rf ReaderFromFunc) ReadFrom(r io.Reader) (int64, error) {
return rf(r)
}
// ReadCloser wraps an io.Reader and io.Closer in order to implement io.ReadCloser.
func ReadCloser(r io.Reader, c io.Closer) io.ReadCloser {
return &ReadCloserType{r, c}
}
// NopReadCloser wraps io.Reader with NopCloser{} in ReadCloserType.
func NopReadCloser(r io.Reader) io.ReadCloser {
return &ReadCloserType{r, NopCloser{}}
}
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