summaryrefslogtreecommitdiffstats
path: root/vendor/golang.org/x/image/ccitt/writer.go
diff options
context:
space:
mode:
authorWim <wim@42.be>2021-10-17 00:47:22 +0200
committerGitHub <noreply@github.com>2021-10-17 00:47:22 +0200
commit4dd8bae5c91fa4aef09d865d8fef1acd84f90925 (patch)
treeffad9b242daccaf8c86d1c1fbd59032302bd3be9 /vendor/golang.org/x/image/ccitt/writer.go
parent7ae45c42e712bd0e66c101f3f714c05aa1dc2104 (diff)
downloadmatterbridge-msglm-4dd8bae5c91fa4aef09d865d8fef1acd84f90925.tar.gz
matterbridge-msglm-4dd8bae5c91fa4aef09d865d8fef1acd84f90925.tar.bz2
matterbridge-msglm-4dd8bae5c91fa4aef09d865d8fef1acd84f90925.zip
Update dependencies (#1610)
* Update dependencies * Update module to go 1.17
Diffstat (limited to 'vendor/golang.org/x/image/ccitt/writer.go')
-rw-r--r--vendor/golang.org/x/image/ccitt/writer.go102
1 files changed, 0 insertions, 102 deletions
diff --git a/vendor/golang.org/x/image/ccitt/writer.go b/vendor/golang.org/x/image/ccitt/writer.go
deleted file mode 100644
index 87130ab0..00000000
--- a/vendor/golang.org/x/image/ccitt/writer.go
+++ /dev/null
@@ -1,102 +0,0 @@
-// Copyright 2019 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package ccitt
-
-import (
- "encoding/binary"
- "io"
-)
-
-type bitWriter struct {
- w io.Writer
-
- // order is whether to process w's bytes LSB first or MSB first.
- order Order
-
- // The high nBits bits of the bits field hold encoded bits to be written to w.
- bits uint64
- nBits uint32
-
- // bytes[:bw] holds encoded bytes not yet written to w.
- // Overflow protection is ensured by using a multiple of 8 as bytes length.
- bw uint32
- bytes [1024]uint8
-}
-
-// flushBits copies 64 bits from b.bits to b.bytes. If b.bytes is then full, it
-// is written to b.w.
-func (b *bitWriter) flushBits() error {
- binary.BigEndian.PutUint64(b.bytes[b.bw:], b.bits)
- b.bits = 0
- b.nBits = 0
- b.bw += 8
- if b.bw < uint32(len(b.bytes)) {
- return nil
- }
- b.bw = 0
- if b.order != MSB {
- reverseBitsWithinBytes(b.bytes[:])
- }
- _, err := b.w.Write(b.bytes[:])
- return err
-}
-
-// close finalizes a bitcode stream by writing any
-// pending bits to bitWriter's underlying io.Writer.
-func (b *bitWriter) close() error {
- // Write any encoded bits to bytes.
- if b.nBits > 0 {
- binary.BigEndian.PutUint64(b.bytes[b.bw:], b.bits)
- b.bw += (b.nBits + 7) >> 3
- }
-
- if b.order != MSB {
- reverseBitsWithinBytes(b.bytes[:b.bw])
- }
-
- // Write b.bw bytes to b.w.
- _, err := b.w.Write(b.bytes[:b.bw])
- return err
-}
-
-// alignToByteBoundary rounds b.nBits up to a multiple of 8.
-// If all 64 bits are used, flush them to bitWriter's bytes.
-func (b *bitWriter) alignToByteBoundary() error {
- if b.nBits = (b.nBits + 7) &^ 7; b.nBits == 64 {
- return b.flushBits()
- }
- return nil
-}
-
-// writeCode writes a variable length bitcode to b's underlying io.Writer.
-func (b *bitWriter) writeCode(bs bitString) error {
- bits := bs.bits
- nBits := bs.nBits
- if 64-b.nBits >= nBits {
- // b.bits has sufficient room for storing nBits bits.
- b.bits |= uint64(bits) << (64 - nBits - b.nBits)
- b.nBits += nBits
- if b.nBits == 64 {
- return b.flushBits()
- }
- return nil
- }
-
- // Number of leading bits that fill b.bits.
- i := 64 - b.nBits
-
- // Fill b.bits then flush and write remaining bits.
- b.bits |= uint64(bits) >> (nBits - i)
- b.nBits = 64
-
- if err := b.flushBits(); err != nil {
- return err
- }
-
- nBits -= i
- b.bits = uint64(bits) << (64 - nBits)
- b.nBits = nBits
- return nil
-}