user: 请将以下的汇编代码转换成C语言代码：

```asm
<sscan_string>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x30,%rsp
  mov    %rdi,-0x28(%rbp)
  mov    -0x28(%rbp),%rax
  mov    %rax,-0x8(%rbp)
L219:
  mov    -0x28(%rbp),%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  cmp    $0x5c,%eax
  je     L200
  cmp    $0x5c,%eax
  jg     L68
  test   %eax,%eax
  je     L106
  cmp    $0x22,%eax
  je     L239
  jmp    L68
L200:
  mov    -0x28(%rbp),%rax
  add    $0x1,%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  test   %eax,%eax
  je     L222
  test   %eax,%eax
  js     L62
  cmp    $0x75,%eax
  jg     L62
  cmp    $0x62,%eax
  jl     L62
  sub    $0x62,%eax
  cmp    $0x13,%eax
  ja     L62
  mov    %eax,%eax
  lea    0x0(,%rax,4),%rdx
  lea    D18(%rip),%rax
  mov    (%rdx,%rax,1),%eax
  cltq
  lea    D18(%rip),%rdx
  add    %rdx,%rax
  notrack jmp *%rax
L222:
  mov    -0x8(%rbp),%rax
  movb   $0x0,(%rax)
  mov    -0x28(%rbp),%rax
  add    $0x1,%rax
  jmp    L231
  mov    -0x8(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x8(%rbp)
  movb   $0x8,(%rax)
  addq   $0x2,-0x28(%rbp)
  jmp    L134
  mov    -0x8(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x8(%rbp)
  movb   $0xc,(%rax)
  addq   $0x2,-0x28(%rbp)
  jmp    L134
  mov    -0x8(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x8(%rbp)
  movb   $0xa,(%rax)
  addq   $0x2,-0x28(%rbp)
  jmp    L134
  mov    -0x8(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x8(%rbp)
  movb   $0xd,(%rax)
  addq   $0x2,-0x28(%rbp)
  jmp    L134
  mov    -0x8(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x8(%rbp)
  movb   $0x9,(%rax)
  addq   $0x2,-0x28(%rbp)
  jmp    L134
L62:
  mov    -0x8(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x8(%rbp)
  mov    -0x28(%rbp),%rdx
  movzbl 0x1(%rdx),%edx
  mov    %dl,(%rax)
  addq   $0x2,-0x28(%rbp)
  jmp    L134
  mov    -0x28(%rbp),%rax
  add    $0x2,%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  mov    %eax,%edi
  call   <dehex@plt>
  mov    %eax,-0x18(%rbp)
  cmpl   $0x0,-0x18(%rbp)
  js     L246
  mov    -0x28(%rbp),%rax
  add    $0x3,%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  mov    %eax,%edi
  call   <dehex@plt>
  mov    %eax,-0x14(%rbp)
  cmpl   $0x0,-0x14(%rbp)
  js     L246
  mov    -0x28(%rbp),%rax
  add    $0x4,%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  mov    %eax,%edi
  call   <dehex@plt>
  mov    %eax,-0x10(%rbp)
  cmpl   $0x0,-0x10(%rbp)
  js     L246
  mov    -0x28(%rbp),%rax
  add    $0x5,%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  mov    %eax,%edi
  call   <dehex@plt>
  mov    %eax,-0xc(%rbp)
  cmpl   $0x0,-0xc(%rbp)
  js     L246
  mov    -0x18(%rbp),%eax
  shl    $0xc,%eax
  mov    %eax,%edx
  mov    -0x14(%rbp),%eax
  shl    $0x8,%eax
  or     %eax,%edx
  mov    -0x10(%rbp),%eax
  shl    $0x4,%eax
  or     %edx,%eax
  or     -0xc(%rbp),%eax
  mov    %eax,%edx
  mov    -0x8(%rbp),%rax
  mov    %edx,%esi
  mov    %rax,%rdi
  call   <encode_utf8@plt>
  mov    %rax,-0x8(%rbp)
  addq   $0x6,-0x28(%rbp)
L246:
  nop
L134:
  jmp    L63
L239:
  mov    -0x8(%rbp),%rax
  movb   $0x0,(%rax)
  mov    -0x28(%rbp),%rax
  add    $0x1,%rax
  jmp    L231
L106:
  mov    -0x8(%rbp),%rax
  movb   $0x0,(%rax)
  mov    -0x28(%rbp),%rax
  jmp    L231
L68:
  mov    -0x28(%rbp),%rdx
  lea    0x1(%rdx),%rax
  mov    %rax,-0x28(%rbp)
  mov    -0x8(%rbp),%rax
  lea    0x1(%rax),%rcx
  mov    %rcx,-0x8(%rbp)
  movzbl (%rdx),%edx
  mov    %dl,(%rax)
  nop
L63:
  jmp    L219
L231:
  leave
  ret
```

assistant: ```c
char *sscan_string(char *s) {
  char *d = s;
  int d1, d2, d3, d4;
  for (;;)
    switch (*s) {
    case '\\':
      switch (s[1]) {
      case '\0':
        *d = '\0';
        return s + 1;
      case 'b':
        *d++ = '\b';
        s += 2;
        break;
      case 'f':
        *d++ = '\f';
        s += 2;
        break;
      case 'n':
        *d++ = '\n';
        s += 2;
        break;
      case 'r':
        *d++ = '\r';
        s += 2;
        break;
      case 't':
        *d++ = '\t';
        s += 2;
        break;
      default:
        *d++ = s[1];
        s += 2;
        break;
      case 'u':
        if ((d1 = dehex(s[2])) >= 0 && (d2 = dehex(s[3])) >= 0 && (d3 = dehex(s[4])) >= 0 && (d4 = dehex(s[5])) >= 0) {
          d = encode_utf8(d, d1 << 12 | d2 << 8 | d3 << 4 | d4);
          s += 6;
        }
        break;
      }
      break;
    case '"':
      *d = '\0';
      return s + 1;
    case '\0':
      *d = '\0';
      return s;
    default:
      *d++ = *s++;
      break;
    }
}
```