user: 下面的汇编指令对应的C源代码是什么:

```asm
<parse_qtd_backslash>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x30,%rsp
  mov    %rdi,-0x8(%rbp)
  mov    %rsi,-0x10(%rbp)
  mov    %rdx,-0x18(%rbp)
  mov    %rcx,-0x20(%rbp)
  mov    %r8,-0x28(%rbp)
  mov    -0x28(%rbp),%rax
  mov    (%rax),%rax
  lea    0x1(%rax),%rdx
  mov    -0x20(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  cmp    $0x60,%eax
  jg     L111
  cmp    $0x22,%eax
  jge    L34
  test   %eax,%eax
  je     L10
  cmp    $0xa,%eax
  je     L138
  jmp    L111
L34:
  sub    $0x22,%eax
  movabs $0x4400000000000005,%rdx
  mov    %eax,%ecx
  shr    %cl,%rdx
  mov    %rdx,%rax
  and    $0x1,%eax
  test   %rax,%rax
  setne  %al
  test   %al,%al
  jne    L63
  jmp    L111
L10:
  mov    D19(%rip),%rax
  mov    (%rax),%eax
  jmp    L106
L138:
  mov    -0x28(%rbp),%rax
  mov    (%rax),%rax
  lea    0x1(%rax),%rdx
  mov    -0x28(%rbp),%rax
  mov    %rdx,(%rax)
  jmp    L69
L63:
  mov    -0x28(%rbp),%rax
  mov    (%rax),%rax
  lea    0x1(%rax),%rdx
  mov    -0x20(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  movsbl %al,%ecx
  mov    -0x8(%rbp),%rax
  mov    (%rax),%rax
  mov    -0x18(%rbp),%rdx
  mov    -0x10(%rbp),%rsi
  mov    %rax,%rdi
  call   <w_addchar@plt>
  mov    -0x8(%rbp),%rdx
  mov    %rax,(%rdx)
  mov    -0x8(%rbp),%rax
  mov    (%rax),%rax
  test   %rax,%rax
  jne    L56
  mov    D29(%rip),%rax
  mov    (%rax),%eax
  jmp    L106
L56:
  mov    -0x28(%rbp),%rax
  mov    (%rax),%rax
  lea    0x1(%rax),%rdx
  mov    -0x28(%rbp),%rax
  mov    %rdx,(%rax)
  jmp    L69
L111:
  mov    -0x28(%rbp),%rax
  mov    (%rax),%rdx
  mov    -0x20(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  movsbl %al,%ecx
  mov    -0x8(%rbp),%rax
  mov    (%rax),%rax
  mov    -0x18(%rbp),%rdx
  mov    -0x10(%rbp),%rsi
  mov    %rax,%rdi
  call   <w_addchar@plt>
  mov    -0x8(%rbp),%rdx
  mov    %rax,(%rdx)
  mov    -0x8(%rbp),%rax
  mov    (%rax),%rax
  test   %rax,%rax
  je     L55
  mov    -0x28(%rbp),%rax
  mov    (%rax),%rax
  lea    0x1(%rax),%rdx
  mov    -0x20(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  movsbl %al,%ecx
  mov    -0x8(%rbp),%rax
  mov    (%rax),%rax
  mov    -0x18(%rbp),%rdx
  mov    -0x10(%rbp),%rsi
  mov    %rax,%rdi
  call   <w_addchar@plt>
  mov    -0x8(%rbp),%rdx
  mov    %rax,(%rdx)
L55:
  mov    -0x8(%rbp),%rax
  mov    (%rax),%rax
  test   %rax,%rax
  jne    L136
  mov    D29(%rip),%rax
  mov    (%rax),%eax
  jmp    L106
L136:
  mov    -0x28(%rbp),%rax
  mov    (%rax),%rax
  lea    0x1(%rax),%rdx
  mov    -0x28(%rbp),%rax
  mov    %rdx,(%rax)
  nop
L69:
  mov    $0x0,%eax
L106:
  leave
  ret
```

assistant: ```c
int parse_qtd_backslash(char **word, size_t *word_length, size_t *max_length, const char *words, size_t *offset) {
  switch (words[1 + *offset]) {
  case 0:
    return WRDE_SYNTAX;
  case '\n':
    ++(*offset);
    break;
  case '$':
  case '`':
  case '"':
  case '\\':
    *word = w_addchar(*word, word_length, max_length, words[1 + *offset]);
    if (*word == NULL)
      return WRDE_NOSPACE;
    ++(*offset);
    break;
  default:
    *word = w_addchar(*word, word_length, max_length, words[*offset]);
    if (*word != NULL)
      *word = w_addchar(*word, word_length, max_length, words[1 + *offset]);
    if (*word == NULL)
      return WRDE_NOSPACE;
    ++(*offset);
    break;
  }
  return 0;
}
```