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45 lines
1.2 KiB
Go
45 lines
1.2 KiB
Go
package interp
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import (
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"io"
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"github.com/wader/fq/internal/asciiwriter"
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"github.com/wader/fq/internal/hexdump"
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"github.com/wader/fq/internal/hexpairwriter"
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"github.com/wader/fq/internal/num"
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"github.com/wader/fq/pkg/bitio"
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)
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func hexdumpRange(bbr bufferRange, w io.Writer, opts Options) error {
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bitsByteAlign := bbr.r.Start % 8
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bb, err := bbr.bb.BitBufRange(bbr.r.Start-bitsByteAlign, bbr.r.Len+bitsByteAlign)
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if err != nil {
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return err
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}
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br := bitio.NewSectionBitReader(bb, 0, bb.Len())
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d := opts.Decorator
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hw := hexdump.New(
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w,
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(bbr.r.Start-bitsByteAlign)/8,
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num.DigitsInBase(bitio.BitsByteCount(bbr.r.Stop()+bitsByteAlign), true, opts.AddrBase),
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opts.AddrBase,
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opts.LineBytes,
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func(b byte) string { return d.ByteColor(b).Wrap(hexpairwriter.Pair(b)) },
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func(b byte) string { return d.ByteColor(b).Wrap(asciiwriter.SafeASCII(b)) },
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func(s string) string { return d.DumpHeader.Wrap(s) },
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func(s string) string { return d.DumpAddr.Wrap(s) },
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d.Column,
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)
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aw := &bitio.AlignBitWriter{W: hw, N: 8}
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// TODO: ugly, AlignBitWriter take Closer? some other way?
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defer hw.Close()
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defer aw.Close()
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if _, err = bitio.Copy(aw, br); err != nil {
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return err
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}
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return nil
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}
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