user: 请显示与下面列出的汇编代码相匹配的C语言实现：

```asm
<Tcl_Backslash>:
  endbr64
  push   %r12
  push   %rbp
  mov    %rdi,%rbp
  push   %rbx
  mov    %rsi,%rbx
  sub    $0x10,%rsp
  movzbl 0x1(%rdi),%r12d
  mov    %fs:0x28,%rax
  mov    %rax,0x8(%rsp)
  xor    %eax,%eax
  cmp    $0x78,%r12b
  jg     L136
  cmp    $0x60,%r12b
  jle    L13
  lea    -0x61(%r12),%eax
  cmp    $0x17,%al
  ja     L136
  lea    D5(%rip),%rdx
  movzbl %al,%eax
  movslq (%rdx,%rax,4),%rax
  add    %rdx,%rax
  notrack jmp *%rax
  nopl   0x0(%rax,%rax,1)
L13:
  test   %r12b,%r12b
  je     L152
  cmp    $0xa,%r12b
  jne    L136
  lea    0x1(%rdi),%rax
  nop
L50:
  movzbl 0x1(%rax),%edx
  add    $0x1,%rax
  cmp    $0x20,%dl
  je     L50
  cmp    $0x9,%dl
  je     L50
  sub    %ebp,%eax
  mov    $0x20,%r12d
  jmp    L110
  nopl   0x0(%rax)
L152:
  mov    $0x1,%eax
  mov    $0x5c,%r12d
L110:
  test   %rbx,%rbx
  je     L31
  mov    %eax,(%rbx)
L31:
  mov    0x8(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L120
  add    $0x10,%rsp
  mov    %r12d,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  ret
  nopw   0x0(%rax,%rax,1)
L136:
  movzbl %r12b,%edx
  mov    $0x2,%eax
  sub    $0x30,%edx
  cmp    $0x9,%edx
  ja     L110
  movzbl 0x2(%rbp),%edx
  sub    $0x30,%r12d
  mov    %edx,%ecx
  sub    $0x30,%edx
  cmp    $0x9,%edx
  ja     L110
  movzbl 0x3(%rbp),%eax
  lea    -0x30(%rcx,%r12,8),%r12d
  mov    %eax,%edx
  sub    $0x30,%eax
  cmp    $0x9,%eax
  jbe    L40
  mov    $0x3,%eax
  jmp    L110
  nopl   0x0(%rax)
  mov    $0x2,%eax
  mov    $0xa,%r12d
  jmp    L110
  mov    $0x2,%eax
  mov    $0xd,%r12d
  jmp    L110
  mov    $0x2,%eax
  mov    $0x9,%r12d
  jmp    L110
  mov    $0x2,%eax
  mov    $0xb,%r12d
  jmp    L110
  mov    $0x2,%eax
  mov    $0xc,%r12d
  jmp    L110
  movzbl 0x2(%rdi),%edi
  call   <isxdigit@plt>
  mov    %eax,%r8d
  mov    $0x2,%eax
  test   %r8d,%r8d
  je     L110
  mov    %rsp,%rsi
  lea    0x2(%rbp),%rdi
  mov    $0x10,%edx
  xor    %eax,%eax
  call   <strtoul@plt>
  mov    %eax,%r12d
  mov    (%rsp),%eax
  sub    %ebp,%eax
  jmp    L110
  nopw   0x0(%rax,%rax,1)
  mov    $0x2,%eax
  mov    $0x7,%r12d
  jmp    L110
  mov    $0x2,%eax
  mov    $0x8,%r12d
  jmp    L110
L40:
  lea    -0x30(%rdx,%r12,8),%r12d
  mov    $0x4,%eax
  jmp    L110
L120:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: retrieve_data
arguments: tag: D5
type_guessed: string

tool: 

assistant: ```c
char Tcl_Backslash(src, readPtr) const char *src;
int *readPtr;
{
  const char *p = src + 1;
  char result;
  int count;
  count = 2;
  switch (*p) {
  case 'a':
    result = 0x7;
    break;
  case 'b':
    result = 0x8;
    break;
  case 'f':
    result = 0xc;
    break;
  case 'n':
    result = 0xa;
    break;
  case 'r':
    result = 0xd;
    break;
  case 't':
    result = 0x9;
    break;
  case 'v':
    result = 0xb;
    break;
  case 'x':
    if (isxdigit(((unsigned char)(p[1])))) {
      char *end;
      result = (char)strtoul(p + 1, &end, 16);
      count = end - src;
    } else {
      count = 2;
      result = 'x';
    }
    break;
  case '\n':
    do {
      p++;
    } while ((*p == ' ') || (*p == '\t'));
    result = ' ';
    count = p - src;
    break;
  case 0:
    result = '\\';
    count = 1;
    break;
  default:
    if (isdigit(((unsigned char)(*p)))) {
      result = (char)(*p - '0');
      p++;
      if (!isdigit(((unsigned char)(*p)))) {
        break;
      }
      count = 3;
      result = (char)((result << 3) + (*p - '0'));
      p++;
      if (!isdigit(((unsigned char)(*p)))) {
        break;
      }
      count = 4;
      result = (char)((result << 3) + (*p - '0'));
      break;
    }
    result = *p;
    count = 2;
    break;
  }
  if (readPtr != 0) {
    *readPtr = count;
  }
  return result;
}
```