Well there is a project introducing something like Linux’s binfmt_misc to OS X so now what you need is an ELF loader, a dynamic linker that can load both Mach-O and ELF, and some mechanism to translate Linux calls to OS X ones. Just for inspiration, you can implement the dynamic linker in the fashion … Read more
You can use setmode(fileno(stdout), O_BINARY) Wrap it in an ifdef if you want to keep it compatible with Linux. See also: https://learn.microsoft.com/en-us/cpp/c-runtime-library/reference/setmode?view=vs-2017
You can use a strategy from this collection of Bit Twiddling Hacks: function bitCount (n) { n = n – ((n >> 1) & 0x55555555) n = (n & 0x33333333) + ((n >> 2) & 0x33333333) return ((n + (n >> 4) & 0xF0F0F0F) * 0x1010101) >> 24 } console.log(bitCount(0xFF)) //=> 8 Note that the … Read more
You could try using objcopy to convert it to a normal object you can link in, and then reference its symbols in the linker script like you would do to a normal object. From the objcopy manual page: -B bfdarch –binary-architecture=bfdarch Useful when transforming a raw binary input file into an object file. In this … Read more
It’s the null character; more info in this Wikipedia article.
Nowadays this is very easy with PDEP from the BMI2 instruction set. Here is a 64-bit version with some examples: #include <cassert> #include <cstdint> #include <x86intrin.h> inline uint64_t nthset(uint64_t x, unsigned n) { return _pdep_u64(1ULL << n, x); } int main() { assert(nthset(0b0000’1101’1000’0100’1100’1000’1010’0000, 0) == 0b0000’0000’0000’0000’0000’0000’0010’0000); assert(nthset(0b0000’1101’1000’0100’1100’1000’1010’0000, 1) == 0b0000’0000’0000’0000’0000’0000’1000’0000); assert(nthset(0b0000’1101’1000’0100’1100’1000’1010’0000, 3) == 0b0000’0000’0000’0000’0100’0000’0000’0000); assert(nthset(0b0000’1101’1000’0100’1100’1000’1010’0000, … Read more
VARBINARY is bound to 255 bytes on MySQL 5.0.2 and below, to 65kB on 5.0.3 and above. BLOB is bound to 65kB. Ultimately, VARBINARY is virtually the same as BLOB (from the perspective of what can be stored in it), unless you want to preserve compatibility with “old” versions of MySQL. The MySQL Documentation says: … Read more
Both String and Int have initializers which take a radix (base). Combining those, you can achieve all of the conversions: // Decimal to binary let d1 = 21 let b1 = String(d1, radix: 2) print(b1) // “10101” // Binary to decimal let b2 = “10110” let d2 = Int(b2, radix: 2)! print(d2) // 22 // … Read more