user: 这段汇编代码用C语言表示是什么样的？

```asm
<alphanum_cmp>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x40,%rsp
  mov    %rdi,-0x38(%rbp)
  mov    %rsi,-0x40(%rbp)
  movl   $0x0,-0x28(%rbp)
  jmp    L167
L54:
  cmpl   $0x0,-0x28(%rbp)
  jne    L25
  jmp    L155
L10:
  movsbl -0x2a(%rbp),%eax
  mov    %eax,%edi
  call   <alphanum_isdigit@plt>
  mov    %eax,-0x24(%rbp)
  movsbl -0x29(%rbp),%eax
  mov    %eax,%edi
  call   <alphanum_isdigit@plt>
  mov    %eax,-0x20(%rbp)
  cmpl   $0x0,-0x24(%rbp)
  je     L44
  cmpl   $0x0,-0x20(%rbp)
  je     L44
  movl   $0x1,-0x28(%rbp)
  jmp    L167
L44:
  cmpl   $0x0,-0x24(%rbp)
  je     L84
  mov    $0xffffffff,%eax
  jmp    L248
L84:
  cmpl   $0x0,-0x20(%rbp)
  je     L241
  mov    $0x1,%eax
  jmp    L248
L241:
  movsbl -0x2a(%rbp),%eax
  mov    %eax,%edi
  call   <toupper@plt>
  mov    %al,-0x2a(%rbp)
  movsbl -0x29(%rbp),%eax
  mov    %eax,%edi
  call   <toupper@plt>
  mov    %al,-0x29(%rbp)
  movsbl -0x2a(%rbp),%eax
  movsbl -0x29(%rbp),%edx
  sub    %edx,%eax
  mov    %eax,-0x1c(%rbp)
  cmpl   $0x0,-0x1c(%rbp)
  je     L60
  mov    -0x1c(%rbp),%eax
  jmp    L248
L60:
  addq   $0x1,-0x38(%rbp)
  addq   $0x1,-0x40(%rbp)
L155:
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  mov    %al,-0x2a(%rbp)
  cmpb   $0x0,-0x2a(%rbp)
  je     L167
  mov    -0x40(%rbp),%rax
  movzbl (%rax),%eax
  mov    %al,-0x29(%rbp)
  cmpb   $0x0,-0x29(%rbp)
  jne    L10
  jmp    L167
L25:
  movq   $0x0,-0x18(%rbp)
  jmp    L262
L22:
  mov    -0x18(%rbp),%rdx
  mov    %rdx,%rax
  shl    $0x2,%rax
  add    %rdx,%rax
  add    %rax,%rax
  mov    %rax,%rdx
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  movsbq %al,%rax
  add    %rdx,%rax
  sub    $0x30,%rax
  mov    %rax,-0x18(%rbp)
  addq   $0x1,-0x38(%rbp)
L262:
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L289
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  mov    %eax,%edi
  call   <alphanum_isdigit@plt>
  test   %eax,%eax
  jne    L22
L289:
  movq   $0x0,-0x10(%rbp)
  jmp    L245
L260:
  mov    -0x10(%rbp),%rdx
  mov    %rdx,%rax
  shl    $0x2,%rax
  add    %rdx,%rax
  add    %rax,%rax
  mov    %rax,%rdx
  mov    -0x40(%rbp),%rax
  movzbl (%rax),%eax
  movsbq %al,%rax
  add    %rdx,%rax
  sub    $0x30,%rax
  mov    %rax,-0x10(%rbp)
  addq   $0x1,-0x40(%rbp)
L245:
  mov    -0x40(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L132
  mov    -0x40(%rbp),%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  mov    %eax,%edi
  call   <alphanum_isdigit@plt>
  test   %eax,%eax
  jne    L260
L132:
  mov    -0x18(%rbp),%rax
  sub    -0x10(%rbp),%rax
  mov    %rax,-0x8(%rbp)
  cmpq   $0x0,-0x8(%rbp)
  je     L252
  mov    -0x8(%rbp),%rax
  jmp    L248
L252:
  movl   $0x0,-0x28(%rbp)
L167:
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L37
  mov    -0x40(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  jne    L54
L37:
  mov    -0x40(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L154
  mov    $0xffffffff,%eax
  jmp    L248
L154:
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L117
  mov    $0x1,%eax
  jmp    L248
L117:
  mov    $0x0,%eax
L248:
  leave
  ret
```

assistant: ```c
int alphanum_cmp(const char *l, const char *r) {
  enum mode_t { STRING, NUMBER } mode = STRING;
  while (*l && *r) {
    if (mode == STRING) {
      char l_char, r_char;
      while ((l_char = *l) && (r_char = *r)) {
        const int l_digit = alphanum_isdigit(l_char);
        const int r_digit = alphanum_isdigit(r_char);
        if (l_digit && r_digit) {
          mode = NUMBER;
          break;
        }
        if (l_digit)
          return -1;
        if (r_digit)
          return +1;
        l_char = toupper(l_char);
        r_char = toupper(r_char);
        const int diff = l_char - r_char;
        if (diff != 0)
          return diff;
        ++l;
        ++r;
      }
    } else {
      unsigned long l_int = 0;
      while (*l && alphanum_isdigit(*l)) {
        l_int = l_int * 10 + *l - '0';
        ++l;
      }
      unsigned long r_int = 0;
      while (*r && alphanum_isdigit(*r)) {
        r_int = r_int * 10 + *r - '0';
        ++r;
      }
      const long diff = l_int - r_int;
      if (diff != 0)
        return diff;
      mode = STRING;
    }
  }
  if (*r)
    return -1;
  if (*l)
    return +1;
  return 0;
}
```