john-okeefe
46ae45ee92
Vendored the sevenzip package to eliminate dependency chain: - sevenzip -> go4.org -> 25+ Google/Cloud/telemetry packages Changes: - Added internal/sevenzip/ with full package source - Inlined go4.org/readerutil into multireaderat.go - Updated all internal imports to use bookhoard/internal/sevenzip - Preserved .cb7 comic archive support This reduces bloat by ~4.9 MB and removes unused telemetry dependencies while maintaining all functionality.
73 lines
1.3 KiB
Go
73 lines
1.3 KiB
Go
package bra
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import (
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"bytes"
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"errors"
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"fmt"
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"io"
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)
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type readCloser struct {
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rc io.ReadCloser
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buf bytes.Buffer
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n int
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conv converter
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}
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var (
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errAlreadyClosed = errors.New("bra: already closed")
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errNeedOneReader = errors.New("bra: need exactly one reader")
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)
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func (rc *readCloser) Close() error {
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if rc.rc == nil {
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return errAlreadyClosed
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}
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if err := rc.rc.Close(); err != nil {
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return fmt.Errorf("bra: error closing: %w", err)
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}
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rc.rc = nil
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return nil
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}
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func (rc *readCloser) Read(p []byte) (int, error) {
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if rc.rc == nil {
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return 0, errAlreadyClosed
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}
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if _, err := io.CopyN(&rc.buf, rc.rc, int64(max(len(p), rc.conv.Size())-rc.buf.Len())); err != nil {
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if !errors.Is(err, io.EOF) {
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return 0, fmt.Errorf("bra: error buffering: %w", err)
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}
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if rc.buf.Len() < rc.conv.Size() {
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rc.n = rc.buf.Len()
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}
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}
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rc.n += rc.conv.Convert(rc.buf.Bytes()[rc.n:], false)
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n, err := rc.buf.Read(p[:min(rc.n, len(p))])
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if err != nil && !errors.Is(err, io.EOF) {
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err = fmt.Errorf("bra: error reading: %w", err)
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}
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rc.n -= n
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return n, err
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}
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func newReader(readers []io.ReadCloser, conv converter) (io.ReadCloser, error) {
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if len(readers) != 1 {
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return nil, errNeedOneReader
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}
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return &readCloser{
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rc: readers[0],
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conv: conv,
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}, nil
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}
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