All new types are defined in <inttypes.h> header (cinttypes header in C++) and also are available at <stdint.h> header (cstdint header in C++). The types...

Both give a maximum-length sequence. An example in C is below: #include <stdint.h> unsigned lfsr_fib(void) { uint16_t start_state = 0xACE1u; /* Any nonzero...

use three shifts and three or four exclusive-or operations: #include <stdint.h> struct xorshift32_state { uint32_t a; }; /* The state must be initialized...

ratified in 1995. Six more header files (complex.h, fenv.h, inttypes.h, stdbool.h, stdint.h, and tgmath.h) were added with C99, a revision to the C Standard...

64-bit pointers and 32-bit integers. This issue is resolved by C99 in stdint.h in the form of intptr_t. The bitness of a program may refer to the word...

In the C and C++ programming languages, unistd.h is the name of the header file that provides access to the POSIX operating system API. It is defined...

to the standard math.h functions for use on Q16.16 fixed-point numbers. libfixmath has no external dependencies other than stdint.h and a compiler which...

decoder in the C programming language: #include <stddef.h> #include <stdint.h> #include <assert.h> /** COBS encode data to buffer @param data Pointer to...

Rijndael S-box). The following C code calculates the S-box: #include <stdint.h> #define ROTL8(x,shift) ((uint8_t) ((x) << (shift)) | ((x) >> (8 - (shift))))...

1812433253. The value for f for MT19937-64 is 6364136223846793005. #include <stdint.h> #define n 624 #define m 397 #define w 32 #define r 31 #define UMASK (0xffffffffUL...

restrict keyword Several new library headers, including stdint.h, <tgmath.h>, fenv.h, <complex.h> Improved compatibility with several C++ features, including...

C99 standard and later, it is available as the SIZE_MAX constant from <stdint.h>. Although not guaranteed by ISO C, it is usually 2^(CHAR_BIT * sizeof(size_t))...

13, 14) // row 4 An implementation in C/C++ appears below. #include <stdint.h> #define ROTL(a,b) (((a) << (b)) | ((a) >> (32 - (b)))) #define QR(a, b...

"PRBS-7" sequence can be expressed in C as #include <stdio.h> #include <stdint.h> #include <stdlib.h> int main(int argc, char* argv[]) { uint8_t start = 0x02;...

punning through a union is also undefined behavior in C++. # include <stdint.h> // uint32_t float Q_rsqrt(float number) { union { float f; uint32_t i;...

unsigned int. */ #include <stdint.h> // for uint32_t, to get 32-bit-wide rotates, regardless of the size of int. #include <limits.h> // for CHAR_BIT uint32_t...

<pthread.h> <setjmp.h> <signal.h> <stdarg.h> <stdbool.h> <stddef.h> <stdint.h> <stdio.h> <stdlib.h> <string.h> <sys/stat.h> <tgmath.h> <time.h> <unistd.h> <utime...

instead. An example of both modulo and masking in C: #include <stdint.h> #include <string.h> int main(void) { const uint32_t NUM_BUCKETS = 0xFFFFFFFF; //...

first but not the second optimization: #include <stdlib.h> /* for size_t */ #include <stdint.h> /* for uint8_t, uint16_t & uint32_t */ uint16_t fletcher16(const...

bits within one (or more) computer words. Here shown in C++: #include <stdint.h> #include <iostream> int main() { uint64_t state = 1u << 31; for (int i...

with 64-bit state and 32-bit output. It can be implemented as: #include <stdint.h> static uint64_t state = 0x4d595df4d0f33173; // Or something seed-dependent...

width, programmers can and should use typedefs from the standard header stdint.h. Integer constants may be specified in source code in several ways. Numeric...

is in the IEEE 754 single precision floating point format */ #include <stdint.h> float sqrt_approx(float z) { union { float f; uint32_t i; } val = {z};...

of the function it is in. Headers: cstdbool (stdbool.h), cstdint (stdint.h), cinttypes (inttypes.h). Heading for a separate TR: Modules Decimal types Math...

released into the public domain by David Wheeler and Roger Needham: #include <stdint.h> void encrypt (uint32_t v[2], const uint32_t k[4]) { uint32_t v0=v[0],...

shift return matches #include <stdint.h> #include <stddef.h> #include <stdbool.h> #include <stdlib.h> #include <unistd.h> #define ALPHABET_LEN 256 #define...

be large enough, C99 specifies the uintptr_t typedef name defined in <stdint.h>, but an implementation need not provide it. C++ fully supports C pointers...

the Cypherpunk mailing list. /* Red Pike cipher source code */ #include <stdint.h> typedef uint32_t word; #define CONST 0x9E3779B9 #define ROUNDS 16 #define...

Wheeler and Roger Needham, encrypts and decrypts using XTEA: #include <stdint.h> /* take 64 bits of data in v[0] and v[1] and 128 bits of key[0] - key[3]...

required for the higher multiples. This would be the routine in C: #include <stdint.h> uint64_t multiply(uint64_t ab, uint64_t cd) { /* These shifts and masks...