user: 请显示与下面列出的汇编代码相匹配的C语言实现：

```asm
<wcstoull>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x50,%rsp
  mov    %rdi,-0x38(%rbp)
  mov    %rsi,-0x40(%rbp)
  mov    %edx,-0x44(%rbp)
  mov    -0x38(%rbp),%rax
  mov    %rax,-0x18(%rbp)
L193:
  mov    -0x18(%rbp),%rax
  lea    0x4(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  mov    (%rax),%eax
  mov    %eax,-0x28(%rbp)
  mov    -0x28(%rbp),%eax
  mov    %eax,%edi
  call   <iswspace@plt>
  test   %rax,%rax
  jne    L193
  cmpl   $0x2d,-0x28(%rbp)
  jne    L218
  movl   $0x1,-0x24(%rbp)
  mov    -0x18(%rbp),%rax
  lea    0x4(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  mov    (%rax),%eax
  mov    %eax,-0x28(%rbp)
  jmp    L293
L218:
  movl   $0x0,-0x24(%rbp)
  cmpl   $0x2b,-0x28(%rbp)
  jne    L293
  mov    -0x18(%rbp),%rax
  lea    0x4(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  mov    (%rax),%eax
  mov    %eax,-0x28(%rbp)
L293:
  cmpl   $0x0,-0x44(%rbp)
  je     L67
  cmpl   $0x10,-0x44(%rbp)
  jne    L282
L67:
  cmpl   $0x30,-0x28(%rbp)
  jne    L282
  mov    -0x18(%rbp),%rax
  mov    (%rax),%eax
  cmp    $0x78,%eax
  je     L101
  mov    -0x18(%rbp),%rax
  mov    (%rax),%eax
  cmp    $0x58,%eax
  jne    L282
L101:
  mov    -0x18(%rbp),%rax
  add    $0x4,%rax
  mov    (%rax),%eax
  mov    %eax,-0x28(%rbp)
  addq   $0x8,-0x18(%rbp)
  movl   $0x10,-0x44(%rbp)
L282:
  cmpl   $0x0,-0x44(%rbp)
  jne    L27
  cmpl   $0x30,-0x28(%rbp)
  jne    L179
  mov    $0x8,%eax
  jmp    L299
L179:
  mov    $0xa,%eax
L299:
  mov    %eax,-0x44(%rbp)
L27:
  movl   $0x0,-0x20(%rbp)
  movq   $0x0,-0x10(%rbp)
  cmpl   $0x1,-0x44(%rbp)
  jle    L196
  cmpl   $0x24,-0x44(%rbp)
  jg     L196
  mov    D40(%rip),%rax
  mov    (%rax),%eax
  cltd
  idivl  -0x44(%rbp)
  cltq
  mov    %rax,-0x8(%rbp)
  mov    D40(%rip),%rax
  mov    (%rax),%eax
  cltd
  idivl  -0x44(%rbp)
  mov    %edx,-0x1c(%rbp)
L318:
  cmpl   $0x2f,-0x28(%rbp)
  jle    L40
  cmpl   $0x39,-0x28(%rbp)
  jg     L40
  subl   $0x30,-0x28(%rbp)
  jmp    L192
L40:
  cmpl   $0x40,-0x28(%rbp)
  jle    L206
  cmpl   $0x5a,-0x28(%rbp)
  jg     L206
  subl   $0x37,-0x28(%rbp)
  jmp    L192
L206:
  cmpl   $0x60,-0x28(%rbp)
  jle    L359
  cmpl   $0x7a,-0x28(%rbp)
  jg     L359
  subl   $0x57,-0x28(%rbp)
L192:
  mov    -0x28(%rbp),%eax
  cmp    -0x44(%rbp),%eax
  jge    L283
  cmpl   $0x0,-0x20(%rbp)
  js     L339
  mov    -0x10(%rbp),%rax
  cmp    -0x8(%rbp),%rax
  ja     L339
  mov    -0x10(%rbp),%rax
  cmp    -0x8(%rbp),%rax
  jne    L252
  mov    -0x28(%rbp),%eax
  cmp    -0x1c(%rbp),%eax
  jle    L252
L339:
  movl   $0xffffffff,-0x20(%rbp)
  jmp    L304
L252:
  movl   $0x1,-0x20(%rbp)
  mov    -0x44(%rbp),%eax
  cltq
  mov    -0x10(%rbp),%rdx
  imul   %rdx,%rax
  mov    %rax,-0x10(%rbp)
  mov    -0x28(%rbp),%eax
  cltq
  add    %rax,-0x10(%rbp)
L304:
  mov    -0x18(%rbp),%rax
  lea    0x4(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  mov    (%rax),%eax
  mov    %eax,-0x28(%rbp)
  jmp    L318
L283:
  nop
L359:
  cmpl   $0x0,-0x20(%rbp)
  jns    L42
  mov    D40(%rip),%rax
  mov    (%rax),%eax
  cltq
  mov    %rax,-0x10(%rbp)
  mov    D28(%rip),%rax
  mov    (%rax),%edx
  mov    D61(%rip),%rax
  mov    %edx,(%rax)
  jmp    L3
L42:
  cmpl   $0x0,-0x20(%rbp)
  jne    L308
  jmp    L262
L196:
  nop
L262:
  mov    D69(%rip),%rax
  mov    (%rax),%edx
  mov    D61(%rip),%rax
  mov    %edx,(%rax)
  jmp    L3
L308:
  cmpl   $0x0,-0x24(%rbp)
  je     L3
  negq   -0x10(%rbp)
L3:
  cmpq   $0x0,-0x40(%rbp)
  je     L126
  cmpl   $0x0,-0x20(%rbp)
  je     L336
  mov    -0x18(%rbp),%rax
  sub    $0x4,%rax
  jmp    L19
L336:
  mov    -0x38(%rbp),%rax
L19:
  mov    -0x40(%rbp),%rdx
  mov    %rax,(%rdx)
L126:
  mov    -0x10(%rbp),%rax
  leave
  ret
```

assistant: ```c
unsigned long long wcstoull(const wchar_t *__restrict nptr, wchar_t **__restrict endptr, int base) {
  const wchar_t *s;
  unsigned long long acc;
  wchar_t c;
  unsigned long long cutoff;
  int neg, any, cutlim;
  s = nptr;
  do {
    c = *s++;
  } while (iswspace(c));
  if (c == L'-') {
    neg = 1;
    c = *s++;
  } else {
    neg = 0;
    if (c == L'+')
      c = *s++;
  }
  if ((base == 0 || base == 16) && c == L'0' && (*s == L'x' || *s == L'X')) {
    c = s[1];
    s += 2;
    base = 16;
  }
  if (base == 0)
    base = c == L'0' ? 8 : 10;
  acc = any = 0;
  if (base < 2 || base > 36)
    goto noconv;
  cutoff = ULLONG_MAX / base;
  cutlim = ULLONG_MAX % base;
  for (;; c = *s++) {
    if (c >= L'0' && c <= L'9')
      c -= L'0';
    else if (c >= L'A' && c <= L'Z')
      c -= L'A' - 10;
    else if (c >= L'a' && c <= L'z')
      c -= L'a' - 10;
    else
      break;
    if (c >= base)
      break;
    if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim))
      any = -1;
    else {
      any = 1;
      acc *= base;
      acc += c;
    }
  }
  if (any < 0) {
    acc = ULLONG_MAX;
    errno = ERANGE;
  } else if (!any) {
  noconv:
    errno = EINVAL;
  } else if (neg)
    acc = -acc;
  if (endptr != NULL)
    *endptr = (wchar_t *)(any ? s - 1 : nptr);
  return (acc);
}
```