user: 提供的汇编代码用C语言表示会是什么样子:

```asm
<aton>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x40,%rsp
  mov    %rdi,-0x38(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  lea    -0x28(%rbp),%rax
  mov    %rax,-0x18(%rbp)
  cmpq   $0x0,-0x38(%rbp)
  jne    L203
  mov    $0xffffffff,%eax
  jmp    L212
L203:
  lea    -0x20(%rbp),%rcx
  mov    -0x38(%rbp),%rax
  mov    $0xa,%edx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <strtol@plt>
  mov    %rax,-0x10(%rbp)
  cmpq   $0x0,-0x10(%rbp)
  js     L186
  cmpq   $0xff,-0x10(%rbp)
  jg     L186
  mov    -0x20(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L186
  mov    -0x20(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x2e,%al
  je     L15
L186:
  mov    $0xffffffff,%eax
  jmp    L212
L15:
  mov    -0x10(%rbp),%rax
  mov    %eax,%edx
  mov    -0x18(%rbp),%rax
  mov    %dl,(%rax)
  mov    -0x20(%rbp),%rax
  lea    0x1(%rax),%rcx
  lea    -0x20(%rbp),%rax
  mov    $0xa,%edx
  mov    %rax,%rsi
  mov    %rcx,%rdi
  call   <strtol@plt>
  mov    %rax,-0x10(%rbp)
  cmpq   $0x0,-0x10(%rbp)
  js     L170
  cmpq   $0xff,-0x10(%rbp)
  jg     L170
  mov    -0x20(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L170
  mov    -0x20(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x2e,%al
  je     L204
L170:
  mov    $0xffffffff,%eax
  jmp    L212
L204:
  mov    -0x18(%rbp),%rax
  add    $0x1,%rax
  mov    -0x10(%rbp),%rdx
  mov    %dl,(%rax)
  mov    -0x20(%rbp),%rax
  lea    0x1(%rax),%rcx
  lea    -0x20(%rbp),%rax
  mov    $0xa,%edx
  mov    %rax,%rsi
  mov    %rcx,%rdi
  call   <strtol@plt>
  mov    %rax,-0x10(%rbp)
  cmpq   $0x0,-0x10(%rbp)
  js     L202
  cmpq   $0xff,-0x10(%rbp)
  jg     L202
  mov    -0x20(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L202
  mov    -0x20(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x2e,%al
  je     L2
L202:
  mov    $0xffffffff,%eax
  jmp    L212
L2:
  mov    -0x18(%rbp),%rax
  add    $0x2,%rax
  mov    -0x10(%rbp),%rdx
  mov    %dl,(%rax)
  mov    -0x20(%rbp),%rax
  lea    0x1(%rax),%rcx
  lea    -0x20(%rbp),%rax
  mov    $0xa,%edx
  mov    %rax,%rsi
  mov    %rcx,%rdi
  call   <strtol@plt>
  mov    %rax,-0x10(%rbp)
  cmpq   $0x0,-0x10(%rbp)
  js     L32
  cmpq   $0xff,-0x10(%rbp)
  jg     L32
  mov    -0x20(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L86
L32:
  mov    $0xffffffff,%eax
  jmp    L212
L86:
  mov    -0x18(%rbp),%rax
  add    $0x3,%rax
  mov    -0x10(%rbp),%rdx
  mov    %dl,(%rax)
  mov    -0x28(%rbp),%rax
L212:
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L165
  call   <__stack_chk_fail@plt>
L165:
  leave
  ret
```

assistant: ```c
unsigned long int aton(const char *host) {
  unsigned long int res;
  unsigned char *bytes = (unsigned char *)&res;
  long int quad;
  char *endptr;
  if (!host)
    return ((unsigned long)0xFFFFFFFF);
  quad = strtol(host, &endptr, 10);
  if ((quad < 0) || (quad > 255) || (*endptr == '\0') || (*endptr != '.'))
    return ((unsigned long)0xFFFFFFFF);
  bytes[0] = (unsigned char)quad;
  quad = strtol(endptr + 1, &endptr, 10);
  if ((quad < 0) || (quad > 255) || (*endptr == '\0') || (*endptr != '.'))
    return ((unsigned long)0xFFFFFFFF);
  bytes[1] = (unsigned char)quad;
  quad = strtol(endptr + 1, &endptr, 10);
  if ((quad < 0) || (quad > 255) || (*endptr == '\0') || (*endptr != '.'))
    return ((unsigned long)0xFFFFFFFF);
  bytes[2] = (unsigned char)quad;
  quad = strtol(endptr + 1, &endptr, 10);
  if ((quad < 0) || (quad > 255) || (*endptr != '\0'))
    return ((unsigned long)0xFFFFFFFF);
  bytes[3] = (unsigned char)quad;
  return res;
}
```