user: 请从给定的汇编指令推导出C源代码:

```asm
<main>:
  endbr64
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x1e0,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x1d8(%rsp)
  xor    %eax,%eax
  movabs $0x39312f32312f3630,%rax
  movabs $0x30333a3031203739,%rdx
  mov    %rax,0x90(%rsp)
  mov    %rdx,0x98(%rsp)
  movq   $0x30333a,0xa0(%rsp)
  movq   $0x0,0xa8(%rsp)
  movq   $0x0,0xb0(%rsp)
  movq   $0x0,0xb8(%rsp)
  movq   $0x0,0xc0(%rsp)
  movq   $0x0,0xc8(%rsp)
  movq   $0x0,0xd0(%rsp)
  movq   $0x0,0xd8(%rsp)
  movabs $0x39312f32312f3830,%rax
  movabs $0x30333a3031203739,%rdx
  mov    %rax,0xe0(%rsp)
  mov    %rdx,0xe8(%rsp)
  movq   $0x39333a,0xf0(%rsp)
  movq   $0x0,0xf8(%rsp)
  movq   $0x0,0x100(%rsp)
  movq   $0x0,0x108(%rsp)
  movq   $0x0,0x110(%rsp)
  movq   $0x0,0x118(%rsp)
  movq   $0x0,0x120(%rsp)
  movq   $0x0,0x128(%rsp)
  movq   $0x0,0x130(%rsp)
  movq   $0x0,0x138(%rsp)
  movq   $0x0,0x140(%rsp)
  movq   $0x0,0x148(%rsp)
  movq   $0x0,0x150(%rsp)
  movq   $0x0,0x158(%rsp)
  movq   $0x0,0x160(%rsp)
  movq   $0x0,0x168(%rsp)
  movq   $0x0,0x170(%rsp)
  movq   $0x0,0x178(%rsp)
  movq   $0x0,0x180(%rsp)
  movq   $0x0,0x188(%rsp)
  movq   $0x0,0x190(%rsp)
  movq   $0x0,0x198(%rsp)
  movq   $0x0,0x1a0(%rsp)
  movq   $0x0,0x1a8(%rsp)
  movq   $0x0,0x1b0(%rsp)
  movq   $0x0,0x1b8(%rsp)
  movq   $0x0,0x1c0(%rsp)
  movq   $0x0,0x1c8(%rsp)
  lea    0x10(%rsp),%rbx
  lea    0x90(%rsp),%rdi
  mov    %rbx,%rdx
  lea    D54(%rip),%r12
  mov    %r12,%rsi
  call   <strptime@plt>
  mov    %rbx,%rdi
  call   <asctime@plt>
  mov    %rax,%rsi
  lea    D62(%rip),%rbp
  mov    %rbp,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  lea    0xe0(%rsp),%rdi
  mov    %rbx,%rdx
  mov    %r12,%rsi
  call   <strptime@plt>
  mov    %rbx,%rdi
  call   <asctime@plt>
  mov    %rax,%rsi
  mov    %rbp,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  lea    D69(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  lea    0x130(%rsp),%rbp
  mov    %rbp,%rdi
  call   <gets@plt>
  mov    %rbx,%rdx
  lea    D78(%rip),%rsi
  mov    %rbp,%rdi
  call   <strptime@plt>
  mov    0x8(%rsp),%ebp
  mov    %rbx,%rdi
  call   <asctime@plt>
  mov    %rax,%rsi
  mov    %ebp,%edx
  lea    D9(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  lea    D36(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  lea    0x180(%rsp),%rbx
  mov    %rbx,%rdi
  call   <gets@plt>
  lea    0x30(%rsp),%rbp
  mov    %rbp,%rdx
  lea    D42(%rip),%rsi
  mov    %rbx,%rdi
  call   <strptime@plt>
  mov    0x28(%rsp),%eax
  mov    %eax,0x48(%rsp)
  mov    0x24(%rsp),%edx
  mov    %edx,0x44(%rsp)
  mov    0x20(%rsp),%edx
  mov    %edx,0x40(%rsp)
  mov    0x1c(%rsp),%edx
  mov    %edx,0x3c(%rsp)
  mov    0x18(%rsp),%edx
  mov    %edx,0x38(%rsp)
  mov    0x14(%rsp),%edx
  mov    %edx,0x34(%rsp)
  mov    0x10(%rsp),%edx
  mov    %edx,0x30(%rsp)
  movdqa 0x10(%rsp),%xmm1
  movaps %xmm1,0x50(%rsp)
  mov    0x20(%rsp),%rdx
  mov    %rdx,0x60(%rsp)
  mov    %eax,0x68(%rsp)
  movdqa 0x30(%rsp),%xmm2
  movaps %xmm2,0x70(%rsp)
  mov    0x40(%rsp),%rdx
  mov    %rdx,0x80(%rsp)
  mov    %eax,0x88(%rsp)
  lea    0x50(%rsp),%r12
  mov    %r12,%rdi
  call   <mktime@plt>
  mov    %eax,0x8(%rsp)
  lea    0x70(%rsp),%rbx
  mov    %rbx,%rdi
  call   <mktime@plt>
  mov    %eax,0xc(%rsp)
  lea    0x8(%rsp),%rdi
  mov    %r12,%rsi
  call   <gmtime_r@plt>
  lea    0xc(%rsp),%rdi
  mov    %rbx,%rsi
  call   <gmtime_r@plt>
  mov    %r12,%rdi
  call   <mktime@plt>
  mov    %eax,0x8(%rsp)
  mov    %rbx,%rdi
  call   <mktime@plt>
  mov    %eax,%edi
  mov    %eax,0xc(%rsp)
  mov    0x8(%rsp),%esi
  call   <difftime@plt>
  movq   %xmm0,%rbx
  mov    %rbp,%rdi
  call   <asctime@plt>
  mov    %rax,%rsi
  movq   %rbx,%xmm0
  lea    D65(%rip),%rdi
  mov    $0x1,%eax
  call   <printf@plt>
  mov    0x1d8(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L4
  mov    $0x0,%eax
  add    $0x1e0,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  ret
L4:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: unpack_data
arguments: data_label: D54
datatype: string
name: unpack_data
arguments: data_label: D62
datatype: string
name: unpack_data
arguments: data_label: D69
datatype: string
name: unpack_data
arguments: data_label: D78
datatype: string
name: unpack_data
arguments: data_label: D9
datatype: string
name: unpack_data
arguments: data_label: D36
datatype: string
name: unpack_data
arguments: data_label: D42
datatype: string
name: unpack_data
arguments: data_label: D65
datatype: string

tool: D54: %m/%d/%Y %T

tool: D62: %s

tool: D69: Enter the time 1 in the mm/dd/yy hh:mm format: 

tool: D78: %m/%d/%y %R

tool: D9: Meeting start at %s or %d seconds

tool: D36: Enter the meeting end time hh:mm format: 

tool: D42: %R

tool: D65: Meeting lasts till %s for %f seconds

assistant: ```c
int main(void) {
  struct tm veley, verakku, tm_1, tm_2;
  char time_str1[80] = "06/12/1997 10:30:30";
  char time_str2[80] = "08/12/1997 10:30:39";
  char time_str3[80] = "";
  char time_str4[80] = "";
  time_t tm1, tm2;
  strptime(time_str1, "%m/%d/%Y %T", &veley);
  printf("%s", asctime(&veley));
  strptime(time_str2, "%m/%d/%Y %T", &veley);
  printf("%s", asctime(&veley));
  printf("Enter the time 1 in the mm/dd/yy hh:mm format: ");
  gets(time_str3);
  strptime(time_str3, "%m/%d/%y %R", &veley);
  printf("Meeting start at %s or %d seconds", asctime(&veley), tm1);
  printf("Enter the meeting end time hh:mm format: ");
  gets(time_str4);
  strptime(time_str4, "%R", &verakku);
  verakku.tm_sec = veley.tm_sec;
  verakku.tm_mday = veley.tm_mday;
  verakku.tm_mon = veley.tm_mon;
  verakku.tm_year = veley.tm_year;
  verakku.tm_wday = veley.tm_wday;
  verakku.tm_yday = veley.tm_yday;
  verakku.tm_isdst = veley.tm_isdst;
  tm_1 = veley;
  tm_2 = verakku;
  tm1 = mktime(&tm_1);
  tm2 = mktime(&tm_2);
  gmtime_r(&tm1, &tm_1);
  gmtime_r(&tm2, &tm_2);
  tm1 = mktime(&tm_1);
  tm2 = mktime(&tm_2);
  printf("Meeting lasts till %s for %f seconds", asctime(&verakku), difftime(tm2, tm1));
}
```