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|
package toml
import (
"fmt"
"io"
toml "github.com/komkom/toml/internal"
"github.com/pkg/errors"
)
type Reader struct {
filter *toml.Filter
filterDone bool
reader io.Reader
readerDone bool
}
// New wraps an io.Reader around an io.Reader.
// Reading data from this Reader reads data from
// its underlying wrapped io.Reader, parses and
// encodes it as a JSON stream.
func New(reader io.Reader) *Reader {
return &Reader{
filter: toml.NewFilter(),
reader: reader,
}
}
func (r *Reader) Read(p []byte) (int, error) {
if !r.readerDone {
for r.filter.State.Buf.Len() < len(p) {
n, err := r.reader.Read(p)
_, err = r.filter.Write(p[:n])
if err != nil {
return 0, err
}
if errors.Is(err, io.EOF) || n == 0 {
r.readerDone = true
break
}
if err != nil {
return 0, err
}
}
}
if r.readerDone && !r.filterDone {
r.filterDone = true
r.filter.WriteRune('\n')
r.filter.WriteRune(toml.EOF)
r.filter.Close()
}
if r.readerDone && r.filterDone && len(r.filter.State.Buf.Bytes()) == 0 {
if len(r.filter.State.Scopes) != 0 {
return 0, fmt.Errorf(`invalid EOF`)
}
return 0, io.EOF
}
ln := len(p)
if len(r.filter.State.Buf.Bytes()) < ln {
ln = len(r.filter.State.Buf.Bytes())
}
n, err := r.filter.State.Buf.Read(p)
r.filter.State.Buf.Truncate(len(r.filter.State.Buf.Bytes()))
return n, err
}
|
