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

```asm
<fftm2s>:
  endbr64
  push   %rbp
  push   %rbx
  sub    $0x68,%rsp
  mov    %ecx,%r10d
  mov    0x80(%rsp),%r11
  mov    0x88(%rsp),%rbx
  mov    %fs:0x28,%rcx
  mov    %rcx,0x58(%rsp)
  xor    %ecx,%ecx
  mov    (%rbx),%ecx
  test   %ecx,%ecx
  jg     L89
  mov    %edi,%eax
  mov    %edx,%edi
  mov    %r8d,%edx
  cmp    $0x270f,%eax
  ja     L146
  cmp    $0xc,%esi
  ja     L198
  cmp    $0x1f,%edi
  ja     L115
  cmp    $0x17,%r10d
  ja     L183
  cmp    $0x3b,%r8d
  ja     L56
  pxor   %xmm1,%xmm1
  comisd %xmm0,%xmm1
  ja     L149
  comisd D38(%rip),%xmm0
  jae    L149
  cmp    $0x19,%r9d
  jg     L86
  test   %r9d,%r9d
  je     L83
  lea    0x3(%r9),%r8d
  jns    L9
  mov    %edi,%r8d
  mov    %esi,%ecx
  mov    %eax,%edx
  lea    D62(%rip),%rsi
  mov    %r11,%rdi
  mov    $0x0,%eax
  call   <sprintf@plt>
  jmp    L19
L146:
  mov    %rsp,%rbp
  mov    %eax,%edx
  lea    D3(%rip),%rsi
  mov    %rbp,%rdi
  mov    $0x0,%eax
  call   <sprintf@plt>
  mov    %rbp,%rdi
  call   <ffpmsg@plt>
  movl   $0x1a4,(%rbx)
  mov    $0x1a4,%ecx
  jmp    L89
L198:
  mov    %rsp,%rbp
  mov    %esi,%edx
  lea    D34(%rip),%rsi
  mov    %rbp,%rdi
  mov    $0x0,%eax
  call   <sprintf@plt>
  mov    %rbp,%rdi
  call   <ffpmsg@plt>
  movl   $0x1a4,(%rbx)
  mov    $0x1a4,%ecx
  jmp    L89
L115:
  mov    %rsp,%rbp
  mov    %edi,%edx
  lea    D66(%rip),%rsi
  mov    %rbp,%rdi
  mov    $0x0,%eax
  call   <sprintf@plt>
  mov    %rbp,%rdi
  call   <ffpmsg@plt>
  movl   $0x1a4,(%rbx)
  mov    $0x1a4,%ecx
  jmp    L89
L183:
  mov    %rsp,%rbp
  mov    %r10d,%edx
  lea    D74(%rip),%rsi
  mov    %rbp,%rdi
  mov    $0x0,%eax
  call   <sprintf@plt>
  mov    %rbp,%rdi
  call   <ffpmsg@plt>
  movl   $0x1a4,(%rbx)
  mov    $0x1a4,%ecx
  jmp    L89
L56:
  mov    %rsp,%rbp
  lea    D65(%rip),%rsi
  mov    %rbp,%rdi
  mov    $0x0,%eax
  call   <sprintf@plt>
  mov    %rbp,%rdi
  call   <ffpmsg@plt>
  movl   $0x1a4,(%rbx)
  mov    $0x1a4,%ecx
  jmp    L89
L149:
  cvttsd2si %xmm0,%edx
  mov    %rsp,%rbp
  lea    D37(%rip),%rsi
  mov    %rbp,%rdi
  mov    $0x0,%eax
  call   <sprintf@plt>
  mov    %rbp,%rdi
  call   <ffpmsg@plt>
  movl   $0x1a4,(%rbx)
  mov    $0x1a4,%ecx
  jmp    L89
L86:
  mov    %rsp,%rbp
  mov    %r9d,%edx
  lea    D32(%rip),%rsi
  mov    %rbp,%rdi
  mov    $0x0,%eax
  call   <sprintf@plt>
  mov    %rbp,%rdi
  call   <ffpmsg@plt>
  movl   $0x1a4,(%rbx)
  mov    $0x1a4,%ecx
  jmp    L89
L83:
  mov    $0x2,%r8d
L9:
  mov    %esi,%ecx
  or     %edi,%ecx
  or     %eax,%ecx
  jne    L180
  mov    %edx,%ecx
  mov    %r10d,%edx
  lea    D71(%rip),%rsi
  mov    %r11,%rdi
  mov    $0x1,%eax
  call   <sprintf@plt>
L19:
  mov    (%rbx),%ecx
L89:
  mov    0x58(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L163
  mov    %ecx,%eax
  add    $0x68,%rsp
  pop    %rbx
  pop    %rbp
  ret
L180:
  sub    $0x8,%rsp
  push   %r9
  push   %r8
  push   %rdx
  mov    %r10d,%r9d
  mov    %edi,%r8d
  mov    %esi,%ecx
  mov    %eax,%edx
  lea    D47(%rip),%rsi
  mov    %r11,%rdi
  mov    $0x1,%eax
  call   <sprintf@plt>
  add    $0x20,%rsp
  jmp    L19
L163:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: unpack_data
arguments: data_tag: D38
type_guessed: f32
name: unpack_data
arguments: data_tag: D62
type_guessed: string
name: unpack_data
arguments: data_tag: D3
type_guessed: string
name: unpack_data
arguments: data_tag: D34
type_guessed: string
name: unpack_data
arguments: data_tag: D66
type_guessed: string
name: unpack_data
arguments: data_tag: D74
type_guessed: string
name: unpack_data
arguments: data_tag: D65
type_guessed: string
name: unpack_data
arguments: data_tag: D37
type_guessed: string
name: unpack_data
arguments: data_tag: D32
type_guessed: string
name: unpack_data
arguments: data_tag: D71
type_guessed: string
name: unpack_data
arguments: data_tag: D47
type_guessed: string

tool: D38: 0

tool: D62: %.4d-%.2d-%.2d

tool: D3: input year value is out of range 0 - 9999: %d (fftm2s)

tool: D34: input month value is out of range 0 - 12: %d (fftm2s)

tool: D66: input day value is out of range 0 - 31: %d (fftm2s)

tool: D74: input hour value is out of range 0 - 23: %d (fftm2s)

tool: D65: input minute value is out of range 0 - 59: %d (fftm2s)

tool: D37: input second value is out of range 0 - 60.999: %f (fftm2s)

tool: D32: input decimals value is out of range 0 - 25: %d (fftm2s)

tool: D71: %.2d:%.2d:%0*.*f

tool: D47: %.4d-%.2d-%.2dT%.2d:%.2d:%0*.*f

assistant: ```c
int fftm2s(int year, int month, int day, int hour, int minute, double second, int decimals, char *datestr, int *status) {
  int width;
  char errmsg[81];
  if (*status > 0)
    return (*status);
  if (year < 0 || year > 9999) {
    sprintf(errmsg, "input year value is out of range 0 - 9999: %d (fftm2s)", year);
    ffpmsg(errmsg);
    return (*status = 420);
  } else if (month < 0 || month > 12) {
    sprintf(errmsg, "input month value is out of range 0 - 12: %d (fftm2s)", month);
    ffpmsg(errmsg);
    return (*status = 420);
  } else if (day < 0 || day > 31) {
    sprintf(errmsg, "input day value is out of range 0 - 31: %d (fftm2s)", day);
    ffpmsg(errmsg);
    return (*status = 420);
  } else if (hour < 0 || hour > 23) {
    sprintf(errmsg, "input hour value is out of range 0 - 23: %d (fftm2s)", hour);
    ffpmsg(errmsg);
    return (*status = 420);
  } else if (minute < 0 || minute > 59) {
    sprintf(errmsg, "input minute value is out of range 0 - 59: %d (fftm2s)", minute);
    ffpmsg(errmsg);
    return (*status = 420);
  } else if (second < 0. || second >= 61) {
    sprintf(errmsg, "input second value is out of range 0 - 60.999: %f (fftm2s)", second);
    ffpmsg(errmsg);
    return (*status = 420);
  } else if (decimals > 25) {
    sprintf(errmsg, "input decimals value is out of range 0 - 25: %d (fftm2s)", decimals);
    ffpmsg(errmsg);
    return (*status = 420);
  }
  if (decimals == 0)
    width = 2;
  else
    width = decimals + 3;
  if (decimals < 0) {
    sprintf(datestr, "%.4d-%.2d-%.2d", year, month, day);
  } else if (year == 0 && month == 0 && day == 0) {
    sprintf(datestr, "%.2d:%.2d:%0*.*f", hour, minute, width, decimals, second);
  } else {
    sprintf(datestr, "%.4d-%.2d-%.2dT%.2d:%.2d:%0*.*f", year, month, day, hour, minute, width, decimals, second);
  }
  return (*status);
}
```