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zeekayandHanzo Dev
aa87442fdd
Source files keep their SPDX-License-Identifier and Hanzo copyright line; the Gitea, Gogs and LFS Test Server copyrights they used to repeat now live once in NOTICE, alongside LICENSE. The header lint accepts any copyright line above the SPDX line, so it no longer demands an upstream one. Co-authored-by: Hanzo Dev <[email protected]>
83 lines
2.1 KiB
Go
83 lines
2.1 KiB
Go
// Copyright 2026 Hanzo AI, Inc. All rights reserved.
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// SPDX-License-Identifier: MIT
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package packages
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import (
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"io"
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"github.com/hanzoai/git/modules/setting"
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"github.com/hanzoai/git/modules/util/filebuffer"
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)
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// HashedSizeReader provide methods to read, sum hashes and a Size method
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type HashedSizeReader interface {
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io.Reader
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HashSummer
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Size() int64
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}
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// HashedBuffer is buffer which calculates multiple checksums
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type HashedBuffer struct {
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*filebuffer.FileBackedBuffer
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hash *MultiHasher
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combinedWriter io.Writer
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}
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const DefaultMemorySize = 32 * 1024 * 1024
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// NewHashedBuffer creates a hashed buffer with the default memory size
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func NewHashedBuffer() (*HashedBuffer, error) {
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return NewHashedBufferWithSize(DefaultMemorySize)
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}
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// NewHashedBufferWithSize creates a hashed buffer with a specific memory size
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func NewHashedBufferWithSize(maxMemorySize int) (*HashedBuffer, error) {
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tempDir, err := setting.AppDataTempDir("package-hashed-buffer").MkdirAllSub("")
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if err != nil {
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return nil, err
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}
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b := filebuffer.New(maxMemorySize, tempDir)
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hash := NewMultiHasher()
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combinedWriter := io.MultiWriter(b, hash)
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return &HashedBuffer{
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b,
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hash,
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combinedWriter,
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}, nil
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}
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// CreateHashedBufferFromReader creates a hashed buffer with the default memory size and copies the provided reader data into it.
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func CreateHashedBufferFromReader(r io.Reader) (*HashedBuffer, error) {
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return CreateHashedBufferFromReaderWithSize(r, DefaultMemorySize)
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}
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// CreateHashedBufferFromReaderWithSize creates a hashed buffer and copies the provided reader data into it.
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func CreateHashedBufferFromReaderWithSize(r io.Reader, maxMemorySize int) (*HashedBuffer, error) {
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b, err := NewHashedBufferWithSize(maxMemorySize)
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if err != nil {
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return nil, err
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}
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_, err = io.Copy(b, r)
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if err != nil {
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return nil, err
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}
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return b, nil
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}
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// Write implements io.Writer
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func (b *HashedBuffer) Write(p []byte) (int, error) {
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return b.combinedWriter.Write(p)
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}
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// Sums gets the MD5, SHA1, SHA256 and SHA512 checksums of the data
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func (b *HashedBuffer) Sums() (hashMD5, hashSHA1, hashSHA256, hashSHA512 []byte) {
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return b.hash.Sums()
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}
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