WebNov 15, 2011 · The platform-independent way is to apply bit-masks and bit-shifts as appropriate. So to get your field from 29 to 35 (inclusive): (flags [1] & 0xF) << 3 (flags [0] & 0xE0000000) >> 29 // The bitmask here isn't really needed, but I like symmetry! Obviously, you could write a class/function/macro to automate this. Share. WebOct 5, 2014 · 2. You can use the bit fields which are often used to represent integral types of known, fixed bit-width. A well-known usage of bit-fields is to represent a set of bits, and/or series of bits, known as flags. You can apply bit operations on them. #include #include struct uint48 { uint64_t x:48; } __attribute__ ( (packed));
c - What is bit masking? - Stack Overflow
WebJul 7, 2015 · 3. As Art suggested, one possibility is to use a macro to create an inline function: #define BIT_FIELD (name, lsb, mask) \ static inline int name (int value) { return (value >> (lsb)) & (mask); } The parentheses are needed for lsb and mask, in case someone gets fancy with the invocation. You can then create functions as needed: WebOct 14, 2014 · Masking is done by setting all the bits except the one(s) you want to 0. So let's say you have a 8 bit variable and you want to check if the 5th bit from the is a 1. Let's say your variable is 00101100. To mask all the other bits we set all the bits except the 5th one to 0 using the & operator: 00101100 & 00010000 how to export apple pages
Bit array - Wikipedia
WebFeb 1, 2024 · Use struct Combined With union to Define Bitmask Data in C. Alternatively, we can add the union keyword to the previous structure so that it’s possible to access the … WebJul 6, 2010 · The third bit, highlow, determines whether the signal is on or off, and sig1 + sig2 together define the 12-bit index of the signal. This index is split across the two bytes by a 0, which is always in bit 7. Type 2 is a 32-bit structure. It has a 2-bit type, a 10-bit index and a 16-bit value, interspersed with 0's at positions 27, 23, 15 & 7. Webbit mask. (programming) A pattern of binary values which is combined with some value using bitwise AND with the result that bits in the value in positions where the mask is … how to export a powerpoint