user: 请从给定的汇编指令推导出C源代码：

```asm
<whiteSpaceLen>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x30,%rsp
  mov    %rdi,-0x28(%rbp)
  movq   $0x0,-0x10(%rbp)
L151:
  mov    -0x10(%rbp),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  mov    %al,-0x11(%rbp)
  cmpb   $0x0,-0x11(%rbp)
  jne    L86
  mov    -0x10(%rbp),%rax
  jmp    L75
L86:
  cmpb   $0x24,-0x11(%rbp)
  jne    L98
  mov    -0x10(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  cmp    $0x28,%al
  jne    L35
L156:
  mov    -0x10(%rbp),%rax
  lea    0x2(%rax),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  mov    %rax,-0x8(%rbp)
  jmp    L17
L71:
  mov    -0x8(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  jne    L64
  movq   $0x0,-0x8(%rbp)
  jmp    L140
L64:
  addq   $0x1,-0x8(%rbp)
L17:
  mov    -0x8(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x24,%al
  jne    L71
L140:
  cmpq   $0x0,-0x8(%rbp)
  jne    L153
  mov    -0x10(%rbp),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  mov    -0x10(%rbp),%rdx
  add    %rdx,%rax
  jmp    L75
L153:
  mov    -0x8(%rbp),%rax
  add    $0x1,%rax
  movzbl (%rax),%eax
  cmp    $0x29,%al
  je     L119
  mov    -0x8(%rbp),%rax
  sub    -0x28(%rbp),%rax
  mov    %rax,-0x10(%rbp)
  jmp    L156
L119:
  nop
  mov    -0x8(%rbp),%rax
  sub    -0x28(%rbp),%rax
  add    $0x2,%rax
  mov    %rax,-0x10(%rbp)
  jmp    L54
L35:
  mov    -0x10(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  cmp    $0x21,%al
  jne    L24
  mov    -0x10(%rbp),%rax
  lea    0x2(%rax),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  mov    $0xa,%esi
  mov    %rax,%rdi
  call   <strchr@plt>
  mov    %rax,-0x8(%rbp)
  cmpq   $0x0,-0x8(%rbp)
  jne    L57
  mov    $0x6b4,%edi
  call   <bug@plt>
L57:
  mov    -0x8(%rbp),%rax
  sub    -0x28(%rbp),%rax
  add    $0x1,%rax
  mov    %rax,-0x10(%rbp)
  jmp    L54
L24:
  mov    -0x10(%rbp),%rax
  jmp    L75
L98:
  movzbl -0x11(%rbp),%eax
  movzbl %al,%eax
  mov    %eax,%edi
  call   <isgraph@plt>
  test   %rax,%rax
  je     L181
  mov    -0x10(%rbp),%rax
  jmp    L75
L181:
  addq   $0x1,-0x10(%rbp)
L54:
  jmp    L151
L75:
  leave
  ret
```

assistant: ```c
long whiteSpaceLen(char *ptr) {
  long i = 0;
  char tmpchr;
  char *ptr1;
  while (1) {
    tmpchr = ptr[i];
    if (!tmpchr)
      return (i);
    if (tmpchr == '$') {
      if (ptr[i + 1] == '(') {
        while (1) {
          for (ptr1 = ptr + i + 2; ptr1[0] != '$'; ptr1++) {
            if (ptr1[0] == 0) {
              if ('$' != 0)
                ptr1 = NULL;
              break;
            }
          }
          if (!ptr1) {
            return (i + (long)strlen(&ptr[i]));
          }
          if (ptr1[1] == ')')
            break;
          i = ptr1 - ptr;
        }
        i = ptr1 - ptr + 2;
        continue;
      } else {
        if (ptr[i + 1] == '!') {
          ptr1 = strchr(ptr + i + 2, '\n');
          if (!ptr1)
            bug(1716);
          i = ptr1 - ptr + 1;
          continue;
        }
        return (i);
      }
    }
    if (isgraph((unsigned char)tmpchr))
      return (i);
    i++;
  }
  return (0);
}
```