user: Demonstrate the C code that generates the assembly output below:

```asm
<mystrtok>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0xd0,%rsp
  mov    %rdi,-0xc8(%rbp)
  mov    %rsi,-0xd0(%rbp)
  mov    -0xc8(%rbp),%rax
  mov    (%rax),%rax
  mov    %rax,-0x98(%rbp)
  mov    -0x98(%rbp),%rax
  movzbl (%rax),%eax
  mov    %al,-0xb1(%rbp)
  movsbl -0xb1(%rbp),%eax
  mov    %eax,-0xac(%rbp)
  cmpl   $0x0,-0xac(%rbp)
  jne    L122
  movq   $0x0,-0x8(%rbp)
  mov    -0x8(%rbp),%rax
  jmp    L102
L122:
  nop
  mov    -0xc8(%rbp),%rax
  mov    (%rax),%rax
  mov    %rax,-0x90(%rbp)
  mov    -0x90(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L105
  mov    -0xc8(%rbp),%rax
  mov    (%rax),%rax
  mov    %rax,-0x88(%rbp)
  mov    -0x88(%rbp),%rax
  movzbl (%rax),%eax
  mov    %al,-0xb0(%rbp)
  movsbl -0xb0(%rbp),%eax
  mov    %eax,-0xa8(%rbp)
  mov    -0xa8(%rbp),%edx
  mov    -0xd0(%rbp),%rax
  mov    %edx,%esi
  mov    %rax,%rdi
  call   <strchr@plt>
  mov    %rax,-0x80(%rbp)
  cmpq   $0x0,-0x80(%rbp)
  je     L72
  mov    -0xc8(%rbp),%rax
  mov    (%rax),%rax
  mov    %rax,-0x78(%rbp)
  mov    -0x78(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    -0xc8(%rbp),%rax
  mov    %rdx,(%rax)
  jmp    L122
L105:
  nop
  jmp    L91
L72:
  nop
L91:
  mov    -0xc8(%rbp),%rax
  mov    (%rax),%rax
  mov    %rax,-0x70(%rbp)
  mov    -0x70(%rbp),%rax
  movzbl (%rax),%eax
  mov    %al,-0xaf(%rbp)
  movsbl -0xaf(%rbp),%eax
  mov    %eax,-0xa4(%rbp)
  cmpl   $0x0,-0xa4(%rbp)
  jne    L17
  movq   $0x0,-0x10(%rbp)
  mov    -0x10(%rbp),%rax
  jmp    L102
L17:
  mov    -0xc8(%rbp),%rax
  mov    (%rax),%rax
  mov    %rax,-0x68(%rbp)
L74:
  mov    -0xc8(%rbp),%rax
  mov    (%rax),%rax
  mov    %rax,-0x60(%rbp)
  mov    -0x60(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L123
  mov    -0xc8(%rbp),%rax
  mov    (%rax),%rax
  mov    %rax,-0x58(%rbp)
  mov    -0x58(%rbp),%rax
  movzbl (%rax),%eax
  mov    %al,-0xae(%rbp)
  movsbl -0xae(%rbp),%eax
  mov    %eax,-0xa0(%rbp)
  mov    -0xa0(%rbp),%edx
  mov    -0xd0(%rbp),%rax
  mov    %edx,%esi
  mov    %rax,%rdi
  call   <strchr@plt>
  mov    %rax,-0x50(%rbp)
  movq   $0x0,-0x48(%rbp)
  mov    -0x48(%rbp),%rax
  mov    %rax,-0x40(%rbp)
  mov    -0x50(%rbp),%rax
  mov    %rax,-0x38(%rbp)
  mov    -0x38(%rbp),%rax
  cmp    -0x40(%rbp),%rax
  jne    L8
  mov    -0xc8(%rbp),%rax
  mov    (%rax),%rax
  mov    %rax,-0x30(%rbp)
  mov    -0x30(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    -0xc8(%rbp),%rax
  mov    %rdx,(%rax)
  jmp    L74
L123:
  nop
  jmp    L61
L8:
  nop
L61:
  mov    -0xc8(%rbp),%rax
  mov    (%rax),%rax
  mov    %rax,-0x28(%rbp)
  mov    -0x28(%rbp),%rax
  movzbl (%rax),%eax
  mov    %al,-0xad(%rbp)
  movsbl -0xad(%rbp),%eax
  mov    %eax,-0x9c(%rbp)
  cmpl   $0x0,-0x9c(%rbp)
  je     L96
  mov    -0xc8(%rbp),%rax
  mov    (%rax),%rax
  mov    %rax,-0x20(%rbp)
  mov    -0xc8(%rbp),%rax
  mov    (%rax),%rax
  mov    %rax,-0x18(%rbp)
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    -0xc8(%rbp),%rax
  mov    %rdx,(%rax)
  mov    -0x20(%rbp),%rax
  movb   $0x0,(%rax)
L96:
  mov    -0x68(%rbp),%rax
L102:
  leave
  ret
```

assistant: ```c
char *mystrtok(char **ptr, char const *sep) {
  char *res;
  char *tmp;
  char *tmp___0;
  char *tmp___1;
  char *__cil_tmp7;
  char __cil_tmp8;
  int __cil_tmp9;
  void *__cil_tmp10;
  char *__cil_tmp11;
  char *__cil_tmp12;
  char __cil_tmp13;
  int __cil_tmp14;
  char *__cil_tmp15;
  char *__cil_tmp16;
  char __cil_tmp17;
  int __cil_tmp18;
  void *__cil_tmp19;
  char *__cil_tmp20;
  char *__cil_tmp21;
  char __cil_tmp22;
  int __cil_tmp23;
  void *__cil_tmp24;
  unsigned long __cil_tmp25;
  unsigned long __cil_tmp26;
  char *__cil_tmp27;
  char *__cil_tmp28;
  char __cil_tmp29;
  int __cil_tmp30;
  char *__cil_tmp31;
  {
    {
      __cil_tmp7 = *ptr;
      __cil_tmp8 = *__cil_tmp7;
      __cil_tmp9 = (int)__cil_tmp8;
      if (__cil_tmp9 == 0) {
        {
          __cil_tmp10 = (void *)0;
          return ((char *)__cil_tmp10);
        }
      } else {
      }
    }
    {
      while (1) {
      while_13_continue:;
        {
          __cil_tmp11 = *ptr;
          if (*__cil_tmp11) {
            {
              __cil_tmp12 = *ptr;
              __cil_tmp13 = *__cil_tmp12;
              __cil_tmp14 = (int)__cil_tmp13;
              tmp = strchr(sep, __cil_tmp14);
            }
            if (tmp) {
            } else {
              goto while_13_break;
            }
          } else {
            goto while_13_break;
          }
        }
        __cil_tmp15 = *ptr;
        *ptr = __cil_tmp15 + 1;
      }
    while_13_break:;
    }
    {
      __cil_tmp16 = *ptr;
      __cil_tmp17 = *__cil_tmp16;
      __cil_tmp18 = (int)__cil_tmp17;
      if (__cil_tmp18 == 0) {
        {
          __cil_tmp19 = (void *)0;
          return ((char *)__cil_tmp19);
        }
      } else {
      }
    }
    res = *ptr;
    {
      while (1) {
      while_14_continue:;
        {
          __cil_tmp20 = *ptr;
          if (*__cil_tmp20) {
            {
              __cil_tmp21 = *ptr;
              __cil_tmp22 = *__cil_tmp21;
              __cil_tmp23 = (int)__cil_tmp22;
              tmp___0 = strchr(sep, __cil_tmp23);
            }
            {
              __cil_tmp24 = (void *)0;
              __cil_tmp25 = (unsigned long)__cil_tmp24;
              __cil_tmp26 = (unsigned long)tmp___0;
              if (__cil_tmp26 == __cil_tmp25) {
              } else {
                goto while_14_break;
              }
            }
          } else {
            goto while_14_break;
          }
        }
        __cil_tmp27 = *ptr;
        *ptr = __cil_tmp27 + 1;
      }
    while_14_break:;
    }
    {
      __cil_tmp28 = *ptr;
      __cil_tmp29 = *__cil_tmp28;
      __cil_tmp30 = (int)__cil_tmp29;
      if (__cil_tmp30 != 0) {
        tmp___1 = *ptr;
        __cil_tmp31 = *ptr;
        *ptr = __cil_tmp31 + 1;
        *tmp___1 = (char)0;
      } else {
      }
    }
    return (res);
  }
}
```