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typedef struct DirEntry DirEntry;
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typedef struct MetaBlock MetaBlock;
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typedef struct MetaEntry MetaEntry;
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enum {
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MetaMagic = 0x5656fc7a,
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MetaHeaderSize = 12,
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MetaIndexSize = 4,
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IndexEntrySize = 8,
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DirMagic = 0x1c4d9072,
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};
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/*
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* Mode bits
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*/
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enum {
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ModeOtherExec = (1<<0),
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ModeOtherWrite = (1<<1),
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ModeOtherRead = (1<<2),
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ModeGroupExec = (1<<3),
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ModeGroupWrite = (1<<4),
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ModeGroupRead = (1<<5),
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ModeOwnerExec = (1<<6),
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ModeOwnerWrite = (1<<7),
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ModeOwnerRead = (1<<8),
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ModeSticky = (1<<9),
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ModeSetUid = (1<<10),
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ModeSetGid = (1<<11),
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ModeAppend = (1<<12), /* append only file */
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ModeExclusive = (1<<13), /* lock file - plan 9 */
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ModeLink = (1<<14), /* sym link */
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ModeDir = (1<<15), /* duplicate of DirEntry */
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ModeHidden = (1<<16), /* MS-DOS */
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ModeSystem = (1<<17), /* MS-DOS */
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ModeArchive = (1<<18), /* MS-DOS */
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ModeTemporary = (1<<19), /* MS-DOS */
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ModeSnapshot = (1<<20), /* read only snapshot */
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};
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/* optional directory entry fields */
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enum {
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DePlan9 = 1, /* not valid in version >= 9 */
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DeNT, /* not valid in version >= 9 */
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DeQidSpace,
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DeGen, /* not valid in version >= 9 */
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};
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struct DirEntry {
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char *elem; /* path element */
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ulong entry; /* entry in directory for data */
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ulong gen; /* generation of data entry */
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ulong mentry; /* entry in directory for meta */
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ulong mgen; /* generation of meta entry */
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uvlong size; /* size of file */
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uvlong qid; /* unique file id */
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char *uid; /* owner id */
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char *gid; /* group id */
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char *mid; /* last modified by */
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ulong mtime; /* last modified time */
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ulong mcount; /* number of modifications: can wrap! */
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ulong ctime; /* directory entry last changed */
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ulong atime; /* last time accessed */
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ulong mode; /* various mode bits */
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/* plan 9 */
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int plan9;
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uvlong p9path;
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ulong p9version;
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/* sub space of qid */
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int qidSpace;
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uvlong qidOffset; /* qid offset */
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uvlong qidMax; /* qid maximum */
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};
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struct MetaEntry {
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uchar *p;
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ushort size;
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};
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struct MetaBlock {
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int maxsize; /* size of block */
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int size; /* size used */
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int free; /* free space within used size */
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int maxindex; /* entries allocated for table */
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int nindex; /* amount of table used */
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int botch; /* compensate for my stupidity */
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uchar *buf;
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};
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void deCleanup(DirEntry*);
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void deCopy(DirEntry*, DirEntry*);
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int deSize(DirEntry*);
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void dePack(DirEntry*, MetaEntry*);
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int deUnpack(DirEntry*, MetaEntry*);
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void mbInit(MetaBlock*, uchar*, int, int);
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int mbUnpack(MetaBlock*, uchar*, int);
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void mbInsert(MetaBlock*, int, MetaEntry*);
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void mbDelete(MetaBlock*, int);
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void mbPack(MetaBlock*);
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uchar *mbAlloc(MetaBlock*, int);
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int mbResize(MetaBlock*, MetaEntry*, int);
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int mbSearch(MetaBlock*, char*, int*, MetaEntry*);
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void meUnpack(MetaEntry*, MetaBlock*, int);
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