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// Copyright 2011-2019 Rémy Oudompheng. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package go-liblzma is a wrapper for liblzma and XZ file format.
package xz
const DefaultBufsize = 32768
type Action uint
const (
// Continue coding.
Run Action = iota
// Make all the input available at output.
SyncFlush
// Finish encoding of the current Block.
FullFlush
// Finish the coding operation.
Finish
)
type Errno uint
var _ error = Errno(0)
const (
// Operation completed successfully.
Ok Errno = iota
// End of stream was reached.
StreamEnd
// Input stream has no integrity check.
NoCheck
// Cannot calculate the integrity check.
UnsupportedCheck
// Integrity check type is now available.
GetCheck
// Cannot allocate memory.
MemError
// Memory usage limit was reached.
MemlimitError
// File format not recognized.
FormatError
// Invalid or unsupported options.
OptionsError
// Data is corrupt.
DataError
// No progress is possible.
BufError
// Programming error.
ProgError
)
var errorMsg = [...]string{
"Operation completed successfully",
"End of stream was reached",
"Input stream has no integrity check",
"Cannot calculate the integrity check",
"Integrity check type is now available",
"Cannot allocate memory",
"Memory usage limit was reached",
"File format not recognized",
"Invalid or unsupported options",
"Data is corrupt",
"No progress is possible",
"Programming error",
}
func (e Errno) Error() string {
return errorMsg[e]
}
type Checksum uint
const (
CheckNone Checksum = 0
CheckCRC32 Checksum = 1
CheckCRC64 Checksum = 4
CheckSHA256 Checksum = 10
)
type Preset uint32
const (
Level0 Preset = iota
Level1
Level2
Level3
Level4
Level5
Level6
Level7
Level8
Level9
)
const (
// Default compression preset.
LevelDefault Preset = Level6
// Extreme compression preset. To be OR'ed with another preset.
LevelExtreme Preset = 1 << 31
// Mask for preset level. To AND with a Preset to extract the level.
LevelMask Preset = 0x1f
)
// Flags passed to liblzma stream decoder constructors.
// See liblzma/src/liblzma/api/lzma/container.h.
const (
// tellNoCheck causes lzma_code to return NoCheck if the input stream has
// no integrity check.
tellNoCheck = 1 << iota
// tellUnsupportedCheck causes lzma_code to return UnsupportedCheck if the
// type of the input stream's integrity check is not supported by this
// version of liblzma.
tellUnsupportedCheck
// tellAnyCheck causes lzma_code to return GetCheck as soon as the type of
// the input stream's integrity check is known.
tellAnyCheck
// concatenated enables decoding of concatenated compressed files.
concatenated
)
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