| Vadim Bendebury | 5679752 | 2015-05-20 10:32:25 -0700 | [diff] [blame] | 1 | // This file was extracted from the TCG Published |
| 2 | // Trusted Platform Module Library |
| 3 | // Part 4: Supporting Routines |
| 4 | // Family "2.0" |
| 5 | // Level 00 Revision 01.16 |
| 6 | // October 30, 2014 |
| 7 | |
| 8 | #include "InternalRoutines.h" |
| 9 | // |
| 10 | // |
| 11 | // Functions |
| 12 | // |
| 13 | // BitIsSet() |
| 14 | // |
| 15 | // This function is used to check the setting of a bit in an array of bits. |
| 16 | // |
| 17 | // Return Value Meaning |
| 18 | // |
| 19 | // TRUE bit is set |
| 20 | // FALSE bit is not set |
| 21 | // |
| 22 | BOOL |
| 23 | BitIsSet( |
| 24 | unsigned int bitNum, // IN: number of the bit in 'bArray' |
| 25 | BYTE *bArray, // IN: array containing the bit |
| 26 | unsigned int arraySize // IN: size in bytes of 'bArray' |
| 27 | ) |
| 28 | { |
| 29 | pAssert(arraySize > (bitNum >> 3)); |
| 30 | return((bArray[bitNum >> 3] & (1 << (bitNum & 7))) != 0); |
| 31 | } |
| 32 | // |
| 33 | // |
| 34 | // BitSet() |
| 35 | // |
| 36 | // This function will set the indicated bit in bArray. |
| 37 | // |
| 38 | void |
| 39 | BitSet( |
| 40 | unsigned int bitNum, // IN: number of the bit in 'bArray' |
| 41 | BYTE *bArray, // IN: array containing the bit |
| 42 | unsigned int arraySize // IN: size in bytes of 'bArray' |
| 43 | ) |
| 44 | { |
| 45 | pAssert(arraySize > bitNum/8); |
| 46 | bArray[bitNum >> 3] |= (1 << (bitNum & 7)); |
| 47 | } |
| 48 | // |
| 49 | // |
| 50 | // BitClear() |
| 51 | // |
| 52 | // This function will clear the indicated bit in bArray. |
| 53 | // |
| 54 | void |
| 55 | BitClear( |
| 56 | unsigned int bitNum, // IN: number of the bit in 'bArray'. |
| 57 | BYTE *bArray, // IN: array containing the bit |
| 58 | unsigned int arraySize // IN: size in bytes of 'bArray' |
| 59 | ) |
| 60 | { |
| 61 | pAssert(arraySize > bitNum/8); |
| 62 | bArray[bitNum >> 3] &= ~(1 << (bitNum & 7)); |
| 63 | } |