user: 提供的汇编代码用C语言表示会是什么样子:

```asm
<flu_n_unescape>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x40,%rsp
  mov    %rdi,-0x38(%rbp)
  mov    %rsi,-0x40(%rbp)
  mov    -0x40(%rbp),%rax
  add    $0x1,%rax
  mov    $0x1,%esi
  mov    %rax,%rdi
  call   <calloc@plt>
  mov    %rax,-0x10(%rbp)
  movq   $0x0,-0x20(%rbp)
  movq   $0x0,-0x18(%rbp)
  jmp    L84
L145:
  mov    -0x38(%rbp),%rdx
  mov    -0x20(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  cmp    $0x5c,%al
  je     L3
  mov    -0x38(%rbp),%rdx
  mov    -0x20(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  mov    -0x10(%rbp),%rdx
  add    %rax,%rdx
  movzbl (%rcx),%eax
  mov    %al,(%rdx)
  jmp    L192
L3:
  mov    -0x20(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  mov    %al,-0x25(%rbp)
  cmpb   $0x5c,-0x25(%rbp)
  jne    L83
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  mov    -0x10(%rbp),%rdx
  add    %rdx,%rax
  movb   $0x5c,(%rax)
  jmp    L180
L83:
  cmpb   $0x22,-0x25(%rbp)
  jne    L134
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  mov    -0x10(%rbp),%rdx
  add    %rdx,%rax
  movb   $0x22,(%rax)
  jmp    L180
L134:
  cmpb   $0x62,-0x25(%rbp)
  jne    L23
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  mov    -0x10(%rbp),%rdx
  add    %rdx,%rax
  movb   $0x8,(%rax)
  jmp    L180
L23:
  cmpb   $0x66,-0x25(%rbp)
  jne    L183
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  mov    -0x10(%rbp),%rdx
  add    %rdx,%rax
  movb   $0xc,(%rax)
  jmp    L180
L183:
  cmpb   $0x6e,-0x25(%rbp)
  jne    L188
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  mov    -0x10(%rbp),%rdx
  add    %rdx,%rax
  movb   $0xa,(%rax)
  jmp    L180
L188:
  cmpb   $0x72,-0x25(%rbp)
  jne    L165
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  mov    -0x10(%rbp),%rdx
  add    %rdx,%rax
  movb   $0xd,(%rax)
  jmp    L180
L165:
  cmpb   $0x74,-0x25(%rbp)
  jne    L45
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  mov    -0x10(%rbp),%rdx
  add    %rdx,%rax
  movb   $0x9,(%rax)
  jmp    L180
L45:
  cmpb   $0x75,-0x25(%rbp)
  jne    L4
  mov    -0x20(%rbp),%rax
  lea    0x2(%rax),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  mov    $0x4,%esi
  mov    %rax,%rdi
  call   <strndup@plt>
  mov    %rax,-0x8(%rbp)
  mov    -0x8(%rbp),%rax
  mov    $0x10,%edx
  mov    $0x0,%esi
  mov    %rax,%rdi
  call   <strtol@plt>
  mov    %eax,-0x24(%rbp)
  mov    -0x8(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  cmpl   $0x7f,-0x24(%rbp)
  ja     L44
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  mov    -0x10(%rbp),%rdx
  add    %rdx,%rax
  mov    -0x24(%rbp),%edx
  mov    %dl,(%rax)
  jmp    L70
L44:
  cmpl   $0x7ff,-0x24(%rbp)
  ja     L226
  mov    -0x24(%rbp),%eax
  shr    $0x6,%eax
  or     $0xffffffc0,%eax
  mov    %eax,%ecx
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  mov    -0x10(%rbp),%rdx
  add    %rdx,%rax
  mov    %ecx,%edx
  mov    %dl,(%rax)
  mov    -0x24(%rbp),%eax
  and    $0x3f,%eax
  or     $0xffffff80,%eax
  mov    %eax,%ecx
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  mov    -0x10(%rbp),%rdx
  add    %rdx,%rax
  mov    %ecx,%edx
  mov    %dl,(%rax)
  jmp    L70
L226:
  mov    -0x24(%rbp),%eax
  shr    $0xc,%eax
  or     $0xffffffe0,%eax
  mov    %eax,%ecx
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  mov    -0x10(%rbp),%rdx
  add    %rdx,%rax
  mov    %ecx,%edx
  mov    %dl,(%rax)
  mov    -0x24(%rbp),%eax
  shr    $0x6,%eax
  and    $0x3f,%eax
  or     $0xffffff80,%eax
  mov    %eax,%ecx
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  mov    -0x10(%rbp),%rdx
  add    %rdx,%rax
  mov    %ecx,%edx
  mov    %dl,(%rax)
  mov    -0x24(%rbp),%eax
  and    $0x3f,%eax
  or     $0xffffff80,%eax
  mov    %eax,%ecx
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  mov    -0x10(%rbp),%rdx
  add    %rdx,%rax
  mov    %ecx,%edx
  mov    %dl,(%rax)
L70:
  addq   $0x4,-0x20(%rbp)
  jmp    L180
L4:
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  mov    -0x10(%rbp),%rdx
  add    %rdx,%rax
  movb   $0x5c,(%rax)
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  mov    -0x10(%rbp),%rdx
  add    %rax,%rdx
  movzbl -0x25(%rbp),%eax
  mov    %al,(%rdx)
L180:
  addq   $0x1,-0x20(%rbp)
L192:
  addq   $0x1,-0x20(%rbp)
L84:
  mov    -0x20(%rbp),%rax
  cmp    -0x40(%rbp),%rax
  jb     L145
  mov    -0x10(%rbp),%rax
  leave
  ret
```

assistant: ```c
char *flu_n_unescape(const char *s, size_t n) {
  char *d = calloc(n + 1, sizeof(char));
  for (size_t is = 0, id = 0; is < n; is++) {
    if (s[is] != '\\') {
      d[id++] = s[is];
      continue;
    }
    char c = s[is + 1];
    if (c == '\\')
      d[id++] = '\\';
    else if (c == '"')
      d[id++] = '"';
    else if (c == 'b')
      d[id++] = '\b';
    else if (c == 'f')
      d[id++] = '\f';
    else if (c == 'n')
      d[id++] = '\n';
    else if (c == 'r')
      d[id++] = '\r';
    else if (c == 't')
      d[id++] = '\t';
    else if (c == 'u') {
      char *su = strndup(s + is + 2, 4);
      unsigned int u = strtol(su, NULL, 16);
      free(su);
      if (u < 0x80) {
        d[id++] = (char)u;
      } else if (u < 0x800) {
        d[id++] = (u >> 6) | 0xc0;
        d[id++] = (u & 0x3f) | 0x80;
      } else {
        d[id++] = (u >> 12) | 0xe0;
        d[id++] = ((u >> 6) & 0x3f) | 0x80;
        d[id++] = (u & 0x3f) | 0x80;
      }
      is += 4;
    } else {
      d[id++] = '\\';
      d[id++] = c;
    }
    is++;
  }
  return d;
}
```