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package loose
import (
"bufio"
"errors"
"io"
"os"
"codeberg.org/lindenii/furgit/internal/compress/zlib"
objectheader "codeberg.org/lindenii/furgit/object/header"
objecttype "codeberg.org/lindenii/furgit/object/type"
)
// decodeAll inflates the full loose object payload from file.
func decodeAll(file *os.File) ([]byte, error) {
zr, err := zlib.NewReader(file)
if err != nil {
return nil, err
}
defer func() { _ = zr.Close() }()
return io.ReadAll(zr)
}
// parseRaw parses a loose object payload in "type size\0content" format.
func parseRaw(raw []byte) (objecttype.Type, []byte, error) {
ty, size, headerLen, ok := objectheader.Parse(raw)
if !ok {
return objecttype.TypeInvalid, nil, errors.New("objectstore/loose: malformed object header")
}
content := raw[headerLen:]
if int64(len(content)) != size {
return objecttype.TypeInvalid, nil, errors.New("objectstore/loose: object header size/content mismatch")
}
return ty, content, nil
}
// readHeader reads and parses a loose object header from br, and returns
// the raw header bytes including the trailing NUL.
func readHeader(br *bufio.Reader) ([]byte, objecttype.Type, int64, error) {
header, err := br.ReadSlice(0)
if err != nil {
return nil, objecttype.TypeInvalid, 0, err
}
ty, size, _, ok := objectheader.Parse(header)
if !ok {
return nil, objecttype.TypeInvalid, 0, errors.New("objectstore/loose: malformed object header")
}
return header, ty, size, nil
}
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