user: 请将这段汇编代码片段转换成等效的C代码:

```asm
<Tcl_ScanCountedElement>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x28,%rsp
  mov    %rdi,%r13
  mov    %rdx,0x8(%rsp)
  mov    %fs:0x28,%rax
  mov    %rax,0x18(%rsp)
  xor    %eax,%eax
  test   %rdi,%rdi
  lea    D6(%rip),%rax
  cmove  %rax,%r13
  cmp    $0xffffffff,%esi
  je     L15
L165:
  movslq %esi,%rsi
  lea    0x0(%r13,%rsi,1),%r12
  cmp    %r12,%r13
  je     L73
  movzbl 0x0(%r13),%eax
  cmp    $0x7b,%al
  sete   %bpl
  cmp    $0x22,%al
  sete   %al
  or     %eax,%ebp
  movzbl %bpl,%ebp
  add    %ebp,%ebp
  mov    %r13,%rbx
  mov    $0x0,%r14d
  movabs $0x800000008000011,%r15
  jmp    L75
L15:
  mov    %r13,%rdi
  call   <strlen@plt>
  mov    %eax,%esi
  jmp    L165
L84:
  cmp    $0xd,%al
  jle    L90
  sub    $0x20,%eax
  cmp    $0x3b,%al
  ja     L151
  bt     %rax,%r15
  jb     L68
L151:
  add    $0x1,%rbx
  cmp    %rbx,%r12
  je     L240
L75:
  movzbl (%rbx),%eax
  cmp    $0x7b,%al
  je     L109
  jg     L222
  cmp    $0x5c,%al
  je     L53
  jg     L151
  jmp    L84
L90:
  cmp    $0x8,%al
  jle    L151
L68:
  or     $0x2,%ebp
  jmp    L151
L222:
  cmp    $0x7d,%al
  jne    L151
  mov    %ebp,%eax
  or     $0x5,%eax
  sub    $0x1,%r14d
  cmovs  %eax,%ebp
  jmp    L151
L109:
  add    $0x1,%r14d
  jmp    L151
L53:
  lea    0x1(%rbx),%rax
  cmp    %r12,%rax
  je     L79
  cmpb   $0xa,0x1(%rbx)
  jne    L218
  mov    %rax,%rbx
  mov    $0x5,%ebp
  jmp    L75
L218:
  lea    0x14(%rsp),%rsi
  mov    %rbx,%rdi
  mov    $0x0,%eax
  call   <Tcl_Backslash@plt>
  movslq 0x14(%rsp),%rax
  lea    -0x1(%rbx,%rax,1),%rbx
  or     $0x2,%ebp
  jmp    L151
L79:
  mov    $0x5,%ebp
L81:
  test   %r14d,%r14d
  mov    $0x5,%edx
  cmovne %edx,%ebp
L148:
  mov    0x8(%rsp),%rcx
  mov    %ebp,(%rcx)
  sub    %r13,%rax
  lea    0x2(%rax,%rax,1),%eax
  mov    0x18(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L4
  add    $0x28,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L240:
  mov    %rbx,%rax
  jmp    L81
L73:
  mov    %r12,%rax
  mov    $0x2,%ebp
  jmp    L148
L4:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: parse_data
arguments: label: D6
datatype: string

tool: 

assistant: ```c
int Tcl_ScanCountedElement(string, length, flagPtr) const char *string;
int length;
int *flagPtr;
{
  int flags, nestingLevel;
  const char *p, *lastChar;
  nestingLevel = 0;
  flags = 0;
  if (string == 0) {
    string = "";
  }
  if (length == -1) {
    length = strlen(string);
  }
  lastChar = string + length;
  p = string;
  if ((p == lastChar) || (*p == '{') || (*p == '"')) {
    flags |= 2;
  }
  for (; p != lastChar; p++) {
    switch (*p) {
    case '{':
      nestingLevel++;
      break;
    case '}':
      nestingLevel--;
      if (nestingLevel < 0) {
        flags |= 1 | 4;
      }
      break;
    case '[':
    case '$':
    case ';':
    case ' ':
    case '\f':
    case '\n':
    case '\r':
    case '\t':
    case '\v':
      flags |= 2;
      break;
    case '\\':
      if ((p + 1 == lastChar) || (p[1] == '\n')) {
        flags = 1 | 4;
      } else {
        int size;
        (void)Tcl_Backslash(p, &size);
        p += size - 1;
        flags |= 2;
      }
      break;
    }
  }
  if (nestingLevel != 0) {
    flags = 1 | 4;
  }
  *flagPtr = flags;
  return 2 * (p - string) + 2;
}
```