suzanne.soy/wiki.gruntnetwork.com--zimmer
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buffer operations

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vss-devel 2019-02-26 20:33:42 +03:00
parent 477e4a657e
commit 3cb9420b45
1 changed files with 30 additions and 34 deletions
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64
zimmer.js
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@ -639,27 +639,22 @@ class Item {
fatal( 'storeDirEntry error: clusterIdx == null', this )
return
}
header.articleCount++
const isRedirect = redirectTarget != null // redirect dirEntry is shorter in 4 bytes
var buf = Buffer.alloc( isRedirect ? 12 : 16 )
var mimeId = this.mimeId()
const mimeId = this.mimeId()
log( 'storeDirEntry', mimeId, this )
writeUIntLE( buf, mimeId, 0, 2 )
writeUIntLE( buf, 0, 2, 1 ) // parameters length
buf.write( this.nameSpace, 3, 1 )
buf.writeIntLE( this.revision, 4, 4 )
writeUIntLE( buf, clusterIdx || redirectTarget || 0, 8, 4 ) // or redirect target article index
if ( ! isRedirect )
writeUIntLE( buf, blobIdx, 12, 4 )
const chunks = [
[ mimeId, 2 ],
[ 0, 1 ], // parameters length
this.nameSpace,
[ this.revision, 4 ],
[ clusterIdx || redirectTarget || 0, 4 ], // or redirect target article index
redirectTarget == null ? [ blobIdx, 4 ] : '', // if not a redirect
this.path + '\0',
this.title + '\0',
]
var urlBuf = Buffer.from( this.path + '\0' )
var titleBuf = Buffer.from( this.title + '\0' )
this.dirEntry = await out.write( Buffer.concat([ buf, urlBuf, titleBuf ]))
log( 'storeDirEntry done', this.dirEntry, buf.length, this.path )
this.dirEntryOffset = await out.write( chunksToBuffer( chunks ))
log( 'storeDirEntry done', this.dirEntryOffset, this.path )
return this.saveDirEntryIndex( this.dirEntry )
}
@ -1379,27 +1374,28 @@ function getHeader () {
//~ log( 'Header', 'articleCount', header.articleCount, 'clusterCount', header.clusterCount, 'mainPage', mainPage )
log( 'Header', header )
var buf = Buffer.alloc( headerLength )
writeUIntLE( buf, header.magicNumber, 0, 4 )
writeUIntLE( buf, header.versionMajor, 4, 2 )
writeUIntLE( buf, header.versionMinor, 6, 2 )
const chunks = [
[ header.magicNumber, 4 ],
[ header.versionMajor, 2 ],
[ header.versionMinor, 2 ],
header.uuid.copy( buf, 8 )
header.uuid,
writeUIntLE( buf, header.articleCount, 24, 4 )
writeUIntLE( buf, header.clusterCount, 28, 4 )
[ header.articleCount, 4 ],
[ header.clusterCount, 4 ],
writeUIntLE( buf, header.urlPtrPos, 32, 8 )
writeUIntLE( buf, header.titlePtrPos, 40, 8 )
writeUIntLE( buf, header.clusterPtrPos, 48, 8 )
writeUIntLE( buf, header.mimeListPos, 56, 8 )
[ header.urlPtrPos, 8 ],
[ header.titlePtrPos, 8 ],
[ header.clusterPtrPos, 8 ],
[ header.mimeListPos, 8 ],
writeUIntLE( buf, header.mainPage, 64, 4 )
writeUIntLE( buf, header.layoutPage, 68, 4 )
[ header.mainPage, 4 ],
[ header.layoutPage, 4 ],
writeUIntLE( buf, header.checksumPos, 72, 8 )
return buf
[ header.checksumPos, 8 ],
]
return chunksToBuffer( chunks )
}
async function storeHeader() {