hfscommon/Misc/VolumeAllocation.c

1877 	register u_int32_t	bitMask;		//	Word with given bits already set (ready to OR in)
1933 		bitMask = kHighBitInWordMask >> (startingBlock & kBitsWithinWordMask);
1941 		if ((currentWord & bitMask) == 0)
1946 		bitMask >>= 1;
1947 		if (bitMask == 0) {
1949 			bitMask = kHighBitInWordMask;
2006 	while ((currentWord & bitMask) == 0) {
2008 		currentWord |= bitMask;
2016 		bitMask >>= 1;
2017 		if (bitMask == 0) {
2021 			bitMask = kHighBitInWordMask;
2263 	register u_int32_t	bitMask;		//	Word with given bits already set (ready to OR in)
2311 		bitMask = kAllBitsSetInWord >> firstBit;	//	turn off all bits before firstBit
2315 			bitMask &= ~(kAllBitsSetInWord >> (firstBit + numBits));	//	turn off bits after last
2318 		if ((*currentWord & SWAP_BE32 (bitMask)) != 0) {
2322 		*currentWord |= SWAP_BE32 (bitMask);		//	set the bits in the bitmap
2333 	bitMask = kAllBitsSetInWord;					//	put this in a register for 68K
2360 		*currentWord = SWAP_BE32 (bitMask);
2372 		bitMask = ~(kAllBitsSetInWord >> numBlocks);	//	set first numBlocks bits
2394 		if ((*currentWord & SWAP_BE32 (bitMask)) != 0) {
2398 		*currentWord |= SWAP_BE32 (bitMask);			//	set the bits in the bitmap
2682 	u_int32_t	bitMask;		//	Word with given bits already set (ready to OR in)
2736 	bitMask = kHighBitInWordMask >> currentBit;
2738 		// Move currentWord/bitMask back by one bit
2739 		bitMask <<= 1;
2740 		if (bitMask == 0) {
2743 			bitMask = kLowBitInWordMask;
2746 		if (*currentWord & SWAP_BE32(bitMask))
2762 		bitMask = kAllBitsSetInWord >> currentBit;	//	turn off all bits before currentBit
2766 			bitMask &= ~(kAllBitsSetInWord >> (currentBit + numBits));	//	turn off bits after last
2769 		    (*currentWord & SWAP_BE32 (bitMask)) != SWAP_BE32 (bitMask)) {
2772 		*currentWord &= SWAP_BE32 (~bitMask);		//	clear the bits in the bitmap
2820 		bitMask = ~(kAllBitsSetInWord >> numBlocks);	//	set first numBlocks bits
2842 		    (*currentWord & SWAP_BE32 (bitMask)) != SWAP_BE32 (bitMask)) {
2845 		*currentWord &= SWAP_BE32 (~bitMask);			//	clear the bits in the bitmap
2858 	bitMask = kHighBitInWordMask >> currentBit;
2860 		// Move currentWord/bitMask/wordsLeft forward one bit
2861 		bitMask >>= 1;
2862 		if (bitMask == 0) {
2866 			bitMask = kHighBitInWordMask;
2869 		if (*currentWord & SWAP_BE32(bitMask))
3050 	register u_int32_t	bitMask;
3119 		bitMask = currentBlock & kBitsWithinWordMask;
3120 		if (bitMask)
3123 			bitMask = kHighBitInWordMask >> bitMask;
3124 			while (tempWord & bitMask)
3126 				bitMask >>= 1;
3130 			//	Did we find an unused bit (bitMask != 0), or run out of bits (bitMask == 0)?
3131 			if (bitMask)
3172 				bitMask = kHighBitInWordMask;
3173 				while (tempWord & bitMask)
3175 					bitMask >>= 1;
3205 		bitMask = currentBlock & kBitsWithinWordMask;
3206 		if (bitMask)
3209 			bitMask = kHighBitInWordMask >> bitMask;
3210 			while (bitMask && !(tempWord & bitMask))
3212 				bitMask >>= 1;
3216 			//	Did we find a used bit (bitMask != 0), or run out of bits (bitMask == 0)?
3217 			if (bitMask)
3260 				bitMask = kHighBitInWordMask;
3261 				while (!(tempWord & bitMask))
3263 					bitMask >>= 1;
3587 	u_int32_t  bitMask;        // Word with given bits already set (ready to test)
3626 		bitMask = kAllBitsSetInWord >> firstBit;
3630 			bitMask &= ~(kAllBitsSetInWord >> (firstBit + numBits));
3632 		if ((*currentWord & SWAP_BE32 (bitMask)) != 0) {
3637 			blockCount += num_bits_set(*currentWord & SWAP_BE32 (bitMask));
3679 		bitMask = ~(kAllBitsSetInWord >> numBlocks);
3694 		if ((*currentWord & SWAP_BE32 (bitMask)) != 0) {
3699 			blockCount += num_bits_set(*currentWord & SWAP_BE32 (bitMask));
3936 	u_int32_t  bitMask;        // Word with given bits already set (ready to test)
3977 	bitMask = kAllBitsSetInWord >> firstBit;
3981 		bitMask &= ~(kAllBitsSetInWord >> (firstBit + numBits));
3983 	if ((*currentWord & SWAP_BE32 (bitMask)) != 0) {