X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/378393581903b274cb7a4d18e0d978071a6b592d..6d2010ae8f7a6078e10b361c6962983bab233e0f:/bsd/hfs/hfscommon/BTree/BTreeNodeOps.c?ds=sidebyside diff --git a/bsd/hfs/hfscommon/BTree/BTreeNodeOps.c b/bsd/hfs/hfscommon/BTree/BTreeNodeOps.c index 590dfecc5..89f4eaf13 100644 --- a/bsd/hfs/hfscommon/BTree/BTreeNodeOps.c +++ b/bsd/hfs/hfscommon/BTree/BTreeNodeOps.c @@ -1,23 +1,29 @@ /* - * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. + * Copyright (c) 2000, 2002, 2005-2008 Apple Inc. All rights reserved. * - * @APPLE_LICENSE_HEADER_START@ + * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * - * The contents of this file constitute Original Code as defined in and - * are subject to the Apple Public Source License Version 1.1 (the - * "License"). You may not use this file except in compliance with the - * License. Please obtain a copy of the License at - * http://www.apple.com/publicsource and read it before using this file. + * This file contains Original Code and/or Modifications of Original Code + * as defined in and that are subject to the Apple Public Source License + * Version 2.0 (the 'License'). You may not use this file except in + * compliance with the License. The rights granted to you under the License + * may not be used to create, or enable the creation or redistribution of, + * unlawful or unlicensed copies of an Apple operating system, or to + * circumvent, violate, or enable the circumvention or violation of, any + * terms of an Apple operating system software license agreement. * - * This Original Code and all software distributed under the License are - * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER + * Please obtain a copy of the License at + * http://www.opensource.apple.com/apsl/ and read it before using this file. + * + * The Original Code and all software distributed under the License are + * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the - * License for the specific language governing rights and limitations - * under the License. + * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. + * Please see the License for the specific language governing rights and + * limitations under the License. * - * @APPLE_LICENSE_HEADER_END@ + * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* File: BTreeNodeOps.c @@ -136,34 +142,34 @@ ////////////////////// Routines Internal To BTreeNodeOps.c ////////////////////// -UInt16 GetRecordOffset (BTreeControlBlockPtr btree, +u_int16_t GetRecordOffset (BTreeControlBlockPtr btree, NodeDescPtr node, - UInt16 index ); + u_int16_t index ); -UInt16 *GetOffsetAddress (BTreeControlBlockPtr btreePtr, +u_int16_t *GetOffsetAddress (BTreeControlBlockPtr btreePtr, NodeDescPtr node, - UInt16 index ); + u_int16_t index ); void InsertOffset (BTreeControlBlockPtr btreePtr, NodeDescPtr node, - UInt16 index, - UInt16 delta ); + u_int16_t index, + u_int16_t delta ); void DeleteOffset (BTreeControlBlockPtr btreePtr, NodeDescPtr node, - UInt16 index ); + u_int16_t index ); ///////////////////////////////////////////////////////////////////////////////// -#define GetRecordOffset(btreePtr,node,index) (*(short *) ((UInt8 *)(node) + (btreePtr)->nodeSize - ((index) << 1) - kOffsetSize)) +#define GetRecordOffset(btreePtr,node,index) (*(short *) ((u_int8_t *)(node) + (btreePtr)->nodeSize - ((index) << 1) - kOffsetSize)) #if HFS_DIAGNOSTIC #include #define PRINTIT kprintf +static void PrintNode(const NodeDescPtr node, u_int16_t nodeSize, u_int32_t nodeNumber); #endif /* HFS_DIAGNOSTIC */ -static void PrintNode(const NodeDescPtr node, UInt16 nodeSize, UInt32 nodeNumber); @@ -184,33 +190,40 @@ Result: -------------------------------------------------------------------------------*/ OSStatus GetNode (BTreeControlBlockPtr btreePtr, - UInt32 nodeNum, + u_int32_t nodeNum, + u_int32_t flags, NodeRec *nodePtr ) { OSStatus err; GetBlockProcPtr getNodeProc; + u_int32_t options; - //€€ is nodeNum within proper range? + // is nodeNum within proper range? if( nodeNum >= btreePtr->totalNodes ) { - Panic("\pGetNode:nodeNum >= totalNodes"); + Panic("GetNode:nodeNum >= totalNodes"); err = fsBTInvalidNodeErr; goto ErrorExit; } nodePtr->blockSize = btreePtr->nodeSize; // indicate the size of a node + + options = kGetBlock; + if ( flags & kGetNodeHint ) + { + options |= kGetBlockHint; + } getNodeProc = btreePtr->getBlockProc; err = getNodeProc (btreePtr->fileRefNum, nodeNum, - kGetBlock, + options, nodePtr ); if (err != noErr) { - Panic ("\pGetNode: getNodeProc returned error."); - // nodePtr->buffer = nil; + Panic ("GetNode: getNodeProc returned error."); goto ErrorExit; } ++btreePtr->numGetNodes; @@ -243,7 +256,7 @@ Result: noErr - success -------------------------------------------------------------------------------*/ OSStatus GetNewNode (BTreeControlBlockPtr btreePtr, - UInt32 nodeNum, + u_int32_t nodeNum, NodeRec *returnNodePtr ) { OSStatus err; @@ -264,7 +277,7 @@ OSStatus GetNewNode (BTreeControlBlockPtr btreePtr, if (err != noErr) { - Panic ("\pGetNewNode: getNodeProc returned error."); + Panic ("GetNewNode: getNodeProc returned error."); // returnNodePtr->buffer = nil; return err; } @@ -278,7 +291,7 @@ OSStatus GetNewNode (BTreeControlBlockPtr btreePtr, ClearNode (btreePtr, node); // clear the node pos = (char *)node + btreePtr->nodeSize - 2; // find address of last offset - *(UInt16 *)pos = sizeof (BTNodeDescriptor); // set offset to beginning of free space + *(u_int16_t *)pos = sizeof (BTNodeDescriptor); // set offset to beginning of free space return noErr; @@ -314,7 +327,7 @@ OSStatus ReleaseNode (BTreeControlBlockPtr btreePtr, err = releaseNodeProc (btreePtr->fileRefNum, nodePtr, kReleaseBlock ); - PanicIf (err, "\pReleaseNode: releaseNodeProc returned error."); + PanicIf (err, "ReleaseNode: releaseNodeProc returned error."); ++btreePtr->numReleaseNodes; } @@ -356,7 +369,7 @@ OSStatus TrashNode (BTreeControlBlockPtr btreePtr, err = releaseNodeProc (btreePtr->fileRefNum, nodePtr, kReleaseBlock | kTrashBlock ); - PanicIf (err, "\TrashNode: releaseNodeProc returned error."); + PanicIf (err, "TrashNode: releaseNodeProc returned error."); ++btreePtr->numReleaseNodes; } @@ -385,9 +398,11 @@ Result: noErr - success OSStatus UpdateNode (BTreeControlBlockPtr btreePtr, NodePtr nodePtr, - UInt32 transactionID, - UInt32 flags ) + u_int32_t transactionID, + u_int32_t flags ) { +#pragma unused(transactionID) + OSStatus err; ReleaseBlockProcPtr releaseNodeProc; @@ -417,19 +432,19 @@ ErrorExit: #if HFS_DIAGNOSTIC -static void PrintNode(const NodeDescPtr node, UInt16 nodeSize, UInt32 nodeNumber) +static void PrintNode(const NodeDescPtr node, u_int16_t nodeSize, u_int32_t nodeNumber) { struct row { - UInt16 word[8]; + u_int16_t word[8]; }; struct row *offset; - UInt16 rows; - UInt32 *lp; + u_int16_t rows; + u_int32_t *lp; PRINTIT("Dump of B-tree node #%ld ($%08lX)\n", nodeNumber, nodeNumber); rows = nodeSize/16; - lp = (UInt32*) node; + lp = (u_int32_t*) node; offset = 0; while (rows-- > 0) @@ -474,14 +489,14 @@ Result: noErr - success Boolean InsertRecord (BTreeControlBlockPtr btreePtr, NodeDescPtr node, - UInt16 index, + u_int16_t index, RecordPtr recPtr, - UInt16 recSize ) + u_int16_t recSize ) { - UInt16 freeSpace; - UInt16 indexOffset; - UInt16 freeOffset; - UInt16 bytesToMove; + u_int16_t freeSpace; + u_int16_t indexOffset; + u_int16_t freeOffset; + u_int16_t bytesToMove; void *src; void *dst; @@ -544,28 +559,28 @@ Result: noErr - success Boolean InsertKeyRecord (BTreeControlBlockPtr btreePtr, NodeDescPtr node, - UInt16 index, + u_int16_t index, KeyPtr keyPtr, - UInt16 keyLength, + u_int16_t keyLength, RecordPtr recPtr, - UInt16 recSize ) + u_int16_t recSize ) { - UInt16 freeSpace; - UInt16 indexOffset; - UInt16 freeOffset; - UInt16 bytesToMove; - UInt8 * src; - UInt8 * dst; - UInt16 keySize; - UInt16 rawKeyLength; - UInt16 sizeOfLength; + u_int16_t freeSpace; + u_int16_t indexOffset; + u_int16_t freeOffset; + u_int16_t bytesToMove; + u_int8_t * src; + u_int8_t * dst; + u_int16_t keySize; + u_int16_t rawKeyLength; + u_int16_t sizeOfLength; //// calculate actual key size if ( btreePtr->attributes & kBTBigKeysMask ) - keySize = keyLength + sizeof(UInt16); + keySize = keyLength + sizeof(u_int16_t); else - keySize = keyLength + sizeof(UInt8); + keySize = keyLength + sizeof(u_int8_t); if ( M_IsOdd (keySize) ) ++keySize; // add pad byte @@ -586,8 +601,8 @@ Boolean InsertKeyRecord (BTreeControlBlockPtr btreePtr, indexOffset = GetRecordOffset (btreePtr, node, index); freeOffset = GetRecordOffset (btreePtr, node, node->numRecords); - src = ((UInt8 *) node) + indexOffset; - dst = ((UInt8 *) src) + keySize + recSize; + src = ((u_int8_t *) node) + indexOffset; + dst = ((u_int8_t *) src) + keySize + recSize; bytesToMove = freeOffset - indexOffset; if (bytesToMove) MoveRecordsRight (src, dst, bytesToMove); @@ -600,11 +615,12 @@ Boolean InsertKeyRecord (BTreeControlBlockPtr btreePtr, //// copy record key - dst = ((UInt8 *) node) + indexOffset; + dst = ((u_int8_t *) node) + indexOffset; if ( btreePtr->attributes & kBTBigKeysMask ) { - *((UInt16*) dst)++ = keyLength; // use keyLength rather than key.length + *((u_int16_t *)dst) = keyLength; // use keyLength rather than key.length + dst = (u_int8_t *) (((u_int16_t *)dst) + 1); rawKeyLength = keyPtr->length16; sizeOfLength = 2; } @@ -615,7 +631,7 @@ Boolean InsertKeyRecord (BTreeControlBlockPtr btreePtr, sizeOfLength = 1; } - MoveRecordsLeft ( ((UInt8 *) keyPtr) + sizeOfLength, dst, rawKeyLength); // copy key + MoveRecordsLeft ( ((u_int8_t *) keyPtr) + sizeOfLength, dst, rawKeyLength); // copy key // any pad bytes? bytesToMove = keySize - rawKeyLength; @@ -625,7 +641,7 @@ Boolean InsertKeyRecord (BTreeControlBlockPtr btreePtr, //// copy record data - dst = ((UInt8 *) node) + indexOffset + keySize; + dst = ((u_int8_t *) node) + indexOffset + keySize; MoveRecordsLeft (recPtr, dst, recSize); return true; @@ -648,12 +664,12 @@ Result: none void DeleteRecord (BTreeControlBlockPtr btreePtr, NodeDescPtr node, - UInt16 index ) + u_int16_t index ) { - SInt16 indexOffset; - SInt16 nextOffset; - SInt16 freeOffset; - SInt16 bytesToMove; + int16_t indexOffset; + int16_t nextOffset; + int16_t freeOffset; + int16_t bytesToMove; void *src; void *dst; @@ -702,24 +718,24 @@ Boolean SearchNode( BTreeControlBlockPtr btreePtr, NodeDescPtr node, KeyPtr searchKey, - UInt16 *returnIndex ) + u_int16_t *returnIndex ) { - SInt32 lowerBound; - SInt32 upperBound; - SInt32 index; - SInt32 result; + int32_t lowerBound; + int32_t upperBound; + int32_t index; + int32_t result; KeyPtr trialKey; - UInt16 *offset; + u_int16_t *offset; KeyCompareProcPtr compareProc = btreePtr->keyCompareProc; lowerBound = 0; upperBound = node->numRecords - 1; - offset = (UInt16 *) ((UInt8 *)(node) + (btreePtr)->nodeSize - kOffsetSize); + offset = (u_int16_t *) ((u_int8_t *)(node) + (btreePtr)->nodeSize - kOffsetSize); while (lowerBound <= upperBound) { index = (lowerBound + upperBound) >> 1; - trialKey = (KeyPtr) ((UInt8 *)node + *(offset - index)); + trialKey = (KeyPtr) ((u_int8_t *)node + *(offset - index)); result = compareProc(searchKey, trialKey); @@ -759,14 +775,14 @@ Result: none OSStatus GetRecordByIndex (BTreeControlBlockPtr btreePtr, NodeDescPtr node, - UInt16 index, + u_int16_t index, KeyPtr *keyPtr, - UInt8 * *dataPtr, - UInt16 *dataSize ) + u_int8_t * *dataPtr, + u_int16_t *dataSize ) { - UInt16 offset; - UInt16 nextOffset; - UInt16 keySize; + u_int16_t offset; + u_int16_t nextOffset; + u_int16_t keySize; // // Make sure index is valid (in range 0..numRecords-1) @@ -784,7 +800,7 @@ OSStatus GetRecordByIndex (BTreeControlBlockPtr btreePtr, ++keySize; // add pad byte offset += keySize; // add the key length to find data offset - *dataPtr = (UInt8 *) node + offset; + *dataPtr = (u_int8_t *) node + offset; //// find dataSize nextOffset = GetRecordOffset (btreePtr, node, index + 1); @@ -808,9 +824,9 @@ Input: btreePtr - pointer to BTree control block Result: - number of bytes used for data and offsets in the node. -------------------------------------------------------------------------------*/ -UInt16 GetNodeDataSize (BTreeControlBlockPtr btreePtr, NodeDescPtr node ) +u_int16_t GetNodeDataSize (BTreeControlBlockPtr btreePtr, NodeDescPtr node ) { - UInt16 freeOffset; + u_int16_t freeOffset; freeOffset = GetRecordOffset (btreePtr, node, node->numRecords); @@ -831,9 +847,9 @@ Input: btreePtr - pointer to BTree control block Result: - number of bytes of free space in the node. -------------------------------------------------------------------------------*/ -UInt16 GetNodeFreeSize (BTreeControlBlockPtr btreePtr, NodeDescPtr node ) +u_int16_t GetNodeFreeSize (BTreeControlBlockPtr btreePtr, NodeDescPtr node ) { - UInt16 freeOffset; + u_int16_t freeOffset; freeOffset = GetRecordOffset (btreePtr, node, node->numRecords); //€€ inline? @@ -856,14 +872,14 @@ Result: - offset (in bytes) from beginning of node of record specified by index -------------------------------------------------------------------------------*/ // make this a macro (for inlining) #if 0 -UInt16 GetRecordOffset (BTreeControlBlockPtr btreePtr, +u_int16_t GetRecordOffset (BTreeControlBlockPtr btreePtr, NodeDescPtr node, - UInt16 index ) + u_int16_t index ) { void *pos; - pos = (UInt8 *)node + btreePtr->nodeSize - (index << 1) - kOffsetSize; + pos = (u_int8_t *)node + btreePtr->nodeSize - (index << 1) - kOffsetSize; return *(short *)pos; } @@ -885,13 +901,13 @@ Result: - pointer to record "index". -------------------------------------------------------------------------------*/ // make this a macro (for inlining) #if 0 -UInt8 * GetRecordAddress (BTreeControlBlockPtr btreePtr, +u_int8_t * GetRecordAddress (BTreeControlBlockPtr btreePtr, NodeDescPtr node, - UInt16 index ) + u_int16_t index ) { - UInt8 * pos; + u_int8_t * pos; - pos = (UInt8 *)node + GetRecordOffset (btreePtr, node, index); + pos = (u_int8_t *)node + GetRecordOffset (btreePtr, node, index); return pos; } @@ -914,13 +930,13 @@ Input: btreePtr - pointer to BTree control block Result: - size of record "index". -------------------------------------------------------------------------------*/ -UInt16 GetRecordSize (BTreeControlBlockPtr btreePtr, +u_int16_t GetRecordSize (BTreeControlBlockPtr btreePtr, NodeDescPtr node, - UInt16 index ) + u_int16_t index ) { - UInt16 *pos; + u_int16_t *pos; - pos = (UInt16 *) ((Ptr)node + btreePtr->nodeSize - (index << 1) - kOffsetSize); + pos = (u_int16_t *) ((Ptr)node + btreePtr->nodeSize - (index << 1) - kOffsetSize); return *(pos-1) - *pos; } @@ -939,15 +955,15 @@ Input: btreePtr - pointer to BTree control block Result: - pointer to offset for record "index". -------------------------------------------------------------------------------*/ -UInt16 *GetOffsetAddress (BTreeControlBlockPtr btreePtr, +u_int16_t *GetOffsetAddress (BTreeControlBlockPtr btreePtr, NodeDescPtr node, - UInt16 index ) + u_int16_t index ) { void *pos; pos = (Ptr)node + btreePtr->nodeSize - (index << 1) -2; - return (UInt16 *)pos; + return (u_int16_t *)pos; } @@ -955,7 +971,7 @@ UInt16 *GetOffsetAddress (BTreeControlBlockPtr btreePtr, /*------------------------------------------------------------------------------- Routine: GetChildNodeNum - Return child node number from index record "index". -Function: Returns the first UInt32 stored after the key for record "index". +Function: Returns the first u_int32_t stored after the key for record "index". Assumes: The node is an Index Node. The key.length stored at record "index" is ODD. //€€ change for variable length index keys @@ -967,16 +983,16 @@ Input: btreePtr - pointer to BTree control block Result: - child node number from record "index". -------------------------------------------------------------------------------*/ -UInt32 GetChildNodeNum (BTreeControlBlockPtr btreePtr, +u_int32_t GetChildNodeNum (BTreeControlBlockPtr btreePtr, NodeDescPtr nodePtr, - UInt16 index ) + u_int16_t index ) { - UInt8 * pos; + u_int8_t * pos; pos = GetRecordAddress (btreePtr, nodePtr, index); pos += CalcKeySize(btreePtr, (BTreeKey *) pos); // key.length + size of length field - return *(UInt32 *)pos; + return *(u_int32_t *)pos; } @@ -998,11 +1014,11 @@ Result: none void InsertOffset (BTreeControlBlockPtr btreePtr, NodeDescPtr node, - UInt16 index, - UInt16 delta ) + u_int16_t index, + u_int16_t delta ) { - UInt16 *src, *dst; - UInt16 numOffsets; + u_int16_t *src, *dst; + u_int16_t numOffsets; src = GetOffsetAddress (btreePtr, node, node->numRecords); // point to free offset dst = src - 1; // point to new offset @@ -1032,11 +1048,11 @@ Result: none void DeleteOffset (BTreeControlBlockPtr btreePtr, NodeDescPtr node, - UInt16 index ) + u_int16_t index ) { - UInt16 *src, *dst; - UInt16 numOffsets; - UInt16 delta; + u_int16_t *src, *dst; + u_int16_t numOffsets; + u_int16_t delta; dst = GetOffsetAddress (btreePtr, node, index); src = dst - 1;