user: 这段汇编代码用C语言表示是什么样的?

```asm
<getop_ptr>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x20,%rsp
  mov    %rdi,-0x18(%rbp)
  nop
L6:
  mov    $0x0,%eax
  call   <getch@plt>
  mov    %eax,-0x8(%rbp)
  mov    -0x8(%rbp),%eax
  mov    %eax,%edx
  mov    -0x18(%rbp),%rax
  mov    %dl,(%rax)
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x20,%al
  je     L6
  cmpl   $0x9,-0x8(%rbp)
  je     L6
  addq   $0x1,-0x18(%rbp)
  mov    -0x18(%rbp),%rax
  movb   $0x0,(%rax)
  mov    -0x8(%rbp),%eax
  movsbl %al,%eax
  mov    %eax,%edi
  call   <isalpha@plt>
  test   %rax,%rax
  je     L92
  nop
L217:
  mov    $0x0,%eax
  call   <getch@plt>
  mov    %eax,-0x8(%rbp)
  addq   $0x1,-0x18(%rbp)
  mov    -0x8(%rbp),%eax
  mov    %eax,%edx
  mov    -0x18(%rbp),%rax
  mov    %dl,(%rax)
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  mov    %eax,%edi
  call   <isalpha@plt>
  test   %rax,%rax
  jne    L217
  mov    -0x18(%rbp),%rax
  movb   $0x0,(%rax)
  mov    D1(%rip),%rax
  mov    (%rax),%eax
  cmp    %eax,-0x8(%rbp)
  je     L207
  mov    -0x8(%rbp),%eax
  mov    %eax,%edi
  call   <ungetch@plt>
L207:
  mov    $0x31,%eax
  jmp    L67
L92:
  mov    -0x8(%rbp),%eax
  movsbl %al,%eax
  mov    %eax,%edi
  call   <isdigit@plt>
  test   %rax,%rax
  jne    L93
  cmpl   $0x2e,-0x8(%rbp)
  je     L93
  cmpl   $0x2d,-0x8(%rbp)
  je     L93
  cmpl   $0x3d,-0x8(%rbp)
  jne    L116
  mov    $0x0,%eax
  call   <getch@plt>
  mov    %eax,-0x4(%rbp)
  cmpl   $0xa,-0x4(%rbp)
  jne    L116
  mov    $0x0,%edi
  call   <ungetch@plt>
  mov    -0x8(%rbp),%eax
  jmp    L67
L116:
  cmpl   $0x0,-0x8(%rbp)
  jne    L20
  mov    $0x32,%eax
  jmp    L67
L20:
  mov    -0x8(%rbp),%eax
  jmp    L67
L93:
  cmpl   $0x2d,-0x8(%rbp)
  jne    L183
  mov    $0x0,%eax
  call   <getch@plt>
  mov    %eax,-0x4(%rbp)
  mov    -0x4(%rbp),%eax
  movsbl %al,%eax
  mov    %eax,%edi
  call   <isdigit@plt>
  test   %rax,%rax
  jne    L35
  cmpl   $0x2e,-0x4(%rbp)
  je     L35
  mov    -0x8(%rbp),%eax
  jmp    L67
L35:
  mov    -0x4(%rbp),%eax
  mov    %eax,-0x8(%rbp)
  jmp    L150
L183:
  mov    $0x0,%eax
  call   <getch@plt>
  mov    %eax,-0x8(%rbp)
  jmp    L150
L62:
  mov    $0x0,%eax
  call   <getch@plt>
  mov    %eax,-0x8(%rbp)
L150:
  addq   $0x1,-0x18(%rbp)
  mov    -0x8(%rbp),%eax
  mov    %eax,%edx
  mov    -0x18(%rbp),%rax
  mov    %dl,(%rax)
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  mov    %eax,%edi
  call   <isdigit@plt>
  test   %rax,%rax
  jne    L62
  cmpl   $0x2e,-0x8(%rbp)
  jne    L69
  nop
L28:
  mov    $0x0,%eax
  call   <getch@plt>
  mov    %eax,-0x8(%rbp)
  addq   $0x1,-0x18(%rbp)
  mov    -0x8(%rbp),%eax
  mov    %eax,%edx
  mov    -0x18(%rbp),%rax
  mov    %dl,(%rax)
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  mov    %eax,%edi
  call   <isdigit@plt>
  test   %rax,%rax
  jne    L28
L69:
  mov    -0x18(%rbp),%rax
  movb   $0x0,(%rax)
  mov    D1(%rip),%rax
  mov    (%rax),%eax
  cmp    %eax,-0x8(%rbp)
  je     L3
  mov    -0x8(%rbp),%eax
  mov    %eax,%edi
  call   <ungetch@plt>
L3:
  mov    $0x30,%eax
L67:
  leave
  ret
```

assistant: ```c
int getop_ptr(char *s) {
  int c, next_ch;
  while ((*s = c = getch()) == ' ' || c == '\t')
    ;
  *++s = '\0';
  if (isalpha(c)) {
    while (isalpha(*++s = c = getch()))
      ;
    *s = '\0';
    if (c != EOF)
      ungetch(c);
    return '1';
  }
  if (!isdigit(c) && c != '.' && c != '-') {
    if (c == '=' && (next_ch = getch()) == '\n') {
      ungetch('\0');
      return c;
    }
    if (c == '\0')
      return '2';
    return c;
  }
  if (c == '-') {
    next_ch = getch();
    if (!isdigit(next_ch) && next_ch != '.')
      return c;
    c = next_ch;
  } else
    c = getch();
  while (isdigit(*++s = c))
    c = getch();
  if (c == '.')
    while (isdigit(*++s = c = getch()))
      ;
  *s = '\0';
  if (c != EOF)
    ungetch(c);
  return '0';
}
```