lwin

 git clone https://github.com/libuv/libuv.git

 

 

https://cgit.freebsd.org/src/commit/

 

 

uint64_t _udiv128(
        uint64_t highDividend,
        uint64_t lowDividend,
        uint64_t divisor,
        uint64_t *remainder
);

; Windows 64-bit calling convention passes parameters as follows:
; RCX == first  64-bit integer parameter (high bits of dividend)
; RDX == second 64-bit integer parameter (low bits of dividend)
; R8  == third  64-bit integer parameter (divisor)
; R9  == fourth 64-bit integer parameter (pointer to remainder)
_udiv128 PROC
mov  rax, rdx
mov  rdx, rcx
div r8           ; 128-bit divide (RDX:RAX / R8)
mov  [r9], rdx   ; store remainder
ret              ; return, with quotient in RDX:RAX
_udiv128 ENDP

 

 

 

 

int open(const char *name) {
    HANDLE hFile = CreateFile(name, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
    if (hFile == INVALID_HANDLE_VALUE)
    {
        return -1;
    }
    return hFile;
}

int    close(int fd) {
    HANDLE hFile = (HANDLE) fd;
    CloseHandle(hFile);
    return 0;
}

enum {
    FILE_BEGIN,
    FILE_CURRENT,
    FILE_END
};
off_t lseek(int fd, off_t off, int whence) {
    HANDLE hFile = (HANDLE) fd;
    if (!SetFilePointerEx(hFile, off, &off, whence))
        return -1;
    return off;
}

ssize_t read(int fd, void *d, size_t n) {
    HANDLE hFile = (HANDLE) fd;
    if (!ReadFile(hFile, d, n, &n, 0))
        return -1;
    return n;
}

ssize_t write(int fd, const void *s, size_t n) {
    HANDLE hFile = (HANDLE) fd;
    if (!WriteFile(hFile, s, n, &n, 0))
        return -1;
    return n;
}