Caleb Gardner
93 lines
2.6 KiB
Go
93 lines
2.6 KiB
Go
package inode
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import (
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"encoding/binary"
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"errors"
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"io"
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"strconv"
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)
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const (
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//The inode type from inode.Common.InodeType
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BasicDirectoryType = iota + 1
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BasicFileType
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BasicSymlinkType
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BasicBlockDeviceType
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BasicCharDeviceType
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BasicFifoType
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BasicSocketType
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ExtendedDirectoryType
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ExtendedFileType
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ExtendedSymlinkType
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ExtendedBlockDeviceType
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ExtendedCharDeviceType
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ExtendedFifoType
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ExtendedSocketType
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)
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//ProcessInode processes the next inode in the given reader
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func ProcessInode(rdr *io.Reader, blockSize uint32) (*Common, interface{}, error) {
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var inodeHeader Common
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err := binary.Read(*rdr, binary.LittleEndian, &inodeHeader)
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if err != nil {
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return nil, nil, err
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}
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switch inodeHeader.InodeType {
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case BasicDirectoryType:
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var inode BasicDirectory
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err = binary.Read(*rdr, binary.LittleEndian, &inode)
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return &inodeHeader, &inode, err
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case BasicFileType:
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inode, err := NewBasicFile(rdr, blockSize)
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return &inodeHeader, inode, err
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case BasicSymlinkType:
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inode, err := NewBasicSymlink(rdr)
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return &inodeHeader, inode, err
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case BasicBlockDeviceType:
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var inode BasicDevice
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err = binary.Read(*rdr, binary.LittleEndian, &inode)
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return &inodeHeader, inode, err
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case BasicCharDeviceType:
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var inode BasicDevice
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err = binary.Read(*rdr, binary.LittleEndian, &inode)
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return &inodeHeader, inode, err
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case BasicFifoType:
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var inode BasicIPC
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err = binary.Read(*rdr, binary.LittleEndian, &inode)
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return &inodeHeader, inode, err
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case BasicSocketType:
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var inode BasicIPC
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err = binary.Read(*rdr, binary.LittleEndian, &inode)
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return &inodeHeader, inode, err
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case ExtendedDirectoryType:
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inode, err := NewExtendedDirectory(rdr)
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return &inodeHeader, inode, err
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case ExtendedFileType:
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inode, err := NewExtendedFile(rdr, blockSize)
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return &inodeHeader, inode, err
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case ExtendedSymlinkType:
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inode, err := NewExtendedSymlink(rdr)
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return &inodeHeader, inode, err
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case ExtendedBlockDeviceType:
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var inode ExtendedDevice
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err = binary.Read(*rdr, binary.LittleEndian, &inode)
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return &inodeHeader, inode, err
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case ExtendedCharDeviceType:
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var inode ExtendedDevice
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err = binary.Read(*rdr, binary.LittleEndian, &inode)
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return &inodeHeader, inode, err
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case ExtendedFifoType:
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var inode ExtendedIPC
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err = binary.Read(*rdr, binary.LittleEndian, &inode)
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return &inodeHeader, inode, err
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case ExtendedSocketType:
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var inode ExtendedIPC
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err = binary.Read(*rdr, binary.LittleEndian, &inode)
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return &inodeHeader, inode, err
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//TODO: implement ALL cases
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default:
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return nil, nil, errors.New("Inode type is unrecognized: " + strconv.FormatInt(int64(inodeHeader.InodeType), 2))
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}
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}
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