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

```asm
<od>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbx
  sub    $0x58,%rsp
  mov    %rdi,-0x68(%rbp)
  mov    %rsi,-0x70(%rbp)
  mov    %rdx,-0x78(%rbp)
  mov    %ecx,-0x7c(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x38(%rbp)
  xor    %eax,%eax
  mov    %rsp,%rax
  mov    %rax,%rbx
  mov    -0x7c(%rbp),%eax
  mov    %eax,%edi
  call   <_length@plt>
  mov    %rax,-0x58(%rbp)
  mov    -0x58(%rbp),%rax
  mov    %rax,%rdi
  call   <_log10@plt>
  add    $0x7,%eax
  movslq %eax,%rdx
  sub    $0x1,%rdx
  mov    %rdx,-0x50(%rbp)
  movslq %eax,%rdx
  mov    %rdx,%r14
  mov    $0x0,%r15d
  movslq %eax,%rdx
  mov    %rdx,%r12
  mov    $0x0,%r13d
  cltq
  mov    $0x10,%edx
  sub    $0x1,%rdx
  add    %rdx,%rax
  mov    $0x10,%esi
  mov    $0x0,%edx
  div    %rsi
  imul   $0x10,%rax,%rax
  mov    %rax,%rcx
  and    $0xfffffffffffff000,%rcx
  mov    %rsp,%rdx
  sub    %rcx,%rdx
L37:
  cmp    %rdx,%rsp
  je     L137
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  jmp    L37
L137:
  mov    %rax,%rdx
  and    $0xfff,%edx
  sub    %rdx,%rsp
  mov    %rax,%rdx
  and    $0xfff,%edx
  test   %rdx,%rdx
  je     L152
  and    $0xfff,%eax
  sub    $0x8,%rax
  add    %rsp,%rax
  orq    $0x0,(%rax)
L152:
  mov    %rsp,%rax
  add    $0x0,%rax
  mov    %rax,-0x48(%rbp)
  mov    -0x7c(%rbp),%edx
  lea    -0x3d(%rbp),%rax
  mov    %edx,%esi
  mov    %rax,%rdi
  call   <_address_format@plt>
  mov    -0x7c(%rbp),%edx
  mov    -0x48(%rbp),%rax
  mov    %edx,%esi
  mov    %rax,%rdi
  call   <_bytes_format@plt>
  cmpq   $0x0,-0x78(%rbp)
  jne    L26
  movq   $0x10,-0x78(%rbp)
L26:
  mov    -0x78(%rbp),%rax
  cmp    -0x58(%rbp),%rax
  jae    L60
  movq   $0x1,-0x78(%rbp)
  jmp    L50
L60:
  mov    -0x78(%rbp),%rax
  mov    $0x0,%edx
  divq   -0x58(%rbp)
  mov    %rax,-0x78(%rbp)
L50:
  mov    -0x70(%rbp),%rax
  mov    $0x0,%edx
  divq   -0x58(%rbp)
  mov    %rdx,%rax
  test   %rax,%rax
  je     L55
  mov    -0x70(%rbp),%rax
  mov    $0x0,%edx
  divq   -0x58(%rbp)
  add    $0x1,%rax
  mov    %rax,-0x70(%rbp)
  jmp    L79
L55:
  mov    -0x70(%rbp),%rax
  mov    $0x0,%edx
  divq   -0x58(%rbp)
  mov    %rax,-0x70(%rbp)
L79:
  mov    -0x7c(%rbp),%eax
  and    $0xc000,%eax
  cmp    $0xc000,%eax
  je     L7
  lea    -0x3d(%rbp),%rax
  mov    $0x0,%esi
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
L7:
  movq   $0x0,-0x60(%rbp)
  jmp    L18
L25:
  mov    -0x7c(%rbp),%edi
  mov    -0x58(%rbp),%rcx
  mov    -0x48(%rbp),%rdx
  mov    -0x60(%rbp),%rsi
  mov    -0x68(%rbp),%rax
  mov    %edi,%r8d
  mov    %rax,%rdi
  call   <_print_date@plt>
  mov    -0x60(%rbp),%rax
  add    $0x1,%rax
  mov    $0x0,%edx
  divq   -0x78(%rbp)
  mov    %rdx,%rax
  test   %rax,%rax
  je     L135
  mov    -0x70(%rbp),%rax
  sub    $0x1,%rax
  cmp    %rax,-0x60(%rbp)
  jne    L125
L135:
  mov    $0xa,%edi
  call   <putchar@plt>
  mov    -0x70(%rbp),%rax
  sub    $0x1,%rax
  cmp    %rax,-0x60(%rbp)
  je     L125
  mov    -0x7c(%rbp),%eax
  and    $0xc000,%eax
  cmp    $0xc000,%eax
  je     L125
  mov    -0x60(%rbp),%rax
  add    $0x1,%rax
  imul   -0x58(%rbp),%rax
  mov    %rax,%rdx
  lea    -0x3d(%rbp),%rax
  mov    %rdx,%rsi
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
L125:
  addq   $0x1,-0x60(%rbp)
L18:
  mov    -0x60(%rbp),%rax
  cmp    -0x70(%rbp),%rax
  jb     L25
  mov    %rbx,%rsp
  nop
  mov    -0x38(%rbp),%rax
  sub    %fs:0x28,%rax
  je     L15
  call   <__stack_chk_fail@plt>
L15:
  lea    -0x28(%rbp),%rsp
  pop    %rbx
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  pop    %rbp
  ret
```

assistant: ```c
void od(void *data, size_t data_len, uint8_t width, uint16_t flags) {
  char address_format[5];
  uint8_t date_length = _length(flags);
  char bytes_format[_log10(date_length) + 7];
  _address_format(address_format, flags);
  _bytes_format(bytes_format, flags);
  if (width == 0) {
    width = (16);
  }
  if (width < date_length) {
    width = 1;
  } else {
    width = (width / date_length);
  }
  if (data_len % date_length) {
    data_len = (data_len / date_length) + 1;
  } else {
    data_len = data_len / date_length;
  }
  if ((flags & (0xc000)) != (0xc000)) {
    printf(address_format, 0);
  }
  for (size_t i = 0; i < data_len; i++) {
    _print_date(data, i, bytes_format, date_length, flags);
    if ((((i + 1) % width) == 0) || i == (data_len - 1)) {
      printf("\n");
      if (i != (data_len - 1)) {
        if ((flags & (0xc000)) != (0xc000)) {
          printf(address_format, date_length * (i + 1));
        }
      }
    }
  }
}
```