user: Converte this assembly snippet into its equivalent C code:

```asm
<main>:
  endbr64
  push   %r13
  push   %r12
  push   %rbp
  sub    $0x60,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x58(%rsp)
  xor    %eax,%eax
  lea    0x10(%rsp),%rbp
  movl   $0xffffffff,0x20(%rsp)
  movabs $0x600000065,%rax
  mov    %rax,0x10(%rsp)
  mov    %rbp,%rdi
  movabs $0x100000004,%rax
  movq   $0x0,0x30(%rsp)
  movq   $0x0,0x28(%rsp)
  mov    %rax,0x18(%rsp)
  call   <mktime@plt>
  cmp    $0xffffffff,%eax
  je     L54
  lea    0x40(%rsp),%r12
  mov    %rbp,%rcx
  mov    $0x14,%esi
  lea    D48(%rip),%rdx
  mov    %r12,%rdi
  call   <strftime@plt>
  mov    %r12,%rdi
  call   <puts@plt>
  mov    %r12,%rdi
  lea    D32(%rip),%rsi
  xor    %r12d,%r12d
  call   <strcmp@plt>
  test   %rax,%rax
  setne  %r12b
L8:
  lea    D54(%rip),%r13
  mov    $0x1,%edx
  lea    D96(%rip),%rsi
  mov    %r13,%rdi
  call   <setenv@plt>
  lea    0xc(%rsp),%rdi
  movl   $0xea5,0xc(%rsp)
  call   <localtime@plt>
  test   %rax,%rax
  je     L49
  movdqu (%rax),%xmm0
  mov    %rbp,%rdi
  movaps %xmm0,0x10(%rsp)
  movdqu 0x10(%rax),%xmm1
  movaps %xmm1,0x20(%rsp)
  mov    0x20(%rax),%rax
  mov    %rax,0x30(%rsp)
  call   <mktime@plt>
  mov    %eax,0xc(%rsp)
  cmp    $0xea5,%eax
  je     L20
  movslq %eax,%rsi
  mov    $0xea5,%edx
  lea    D75(%rip),%rdi
  mov    $0x1,%r12d
  call   <printf@plt>
L31:
  mov    $0x1,%edx
  lea    D33(%rip),%rsi
  mov    %r13,%rdi
  call   <setenv@plt>
  mov    %rbp,%rdi
  call   <mktime@plt>
  mov    %eax,0xc(%rsp)
  cmp    $0xffffba45,%eax
  je     L15
  movslq %eax,%rsi
  mov    $0xffffffffffffba45,%rdx
  lea    D87(%rip),%rdi
  mov    $0x1,%r12d
  call   <printf@plt>
L13:
  mov    0x58(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L26
  add    $0x60,%rsp
  mov    %r12d,%eax
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
L20:
  lea    D17(%rip),%rdi
  call   <puts@plt>
  jmp    L31
L54:
  lea    D38(%rip),%rdi
  mov    $0x1,%r12d
  call   <puts@plt>
  jmp    L8
L49:
  lea    D99(%rip),%rdi
  mov    $0x1,%r12d
  call   <puts@plt>
  jmp    L13
L15:
  lea    D76(%rip),%rdi
  call   <puts@plt>
  jmp    L13
L26:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: disassemble_data
arguments: tag: D48
type_guessed: string
name: disassemble_data
arguments: tag: D32
type_guessed: string
name: disassemble_data
arguments: tag: D54
type_guessed: string
name: disassemble_data
arguments: tag: D96
type_guessed: string
name: disassemble_data
arguments: tag: D75
type_guessed: string
name: disassemble_data
arguments: tag: D33
type_guessed: string
name: disassemble_data
arguments: tag: D87
type_guessed: string
name: disassemble_data
arguments: tag: D17
type_guessed: string
name: disassemble_data
arguments: tag: D38
type_guessed: string
name: disassemble_data
arguments: tag: D99
type_guessed: string
name: disassemble_data
arguments: tag: D76
type_guessed: string

tool: D48: %A

tool: D32: Wednesday

tool: D54: TZ

tool: D96: EST+5

tool: D75: mktime returned %ld, expected %d


tool: D33: CET-1

tool: D87: mktime returned %ld, expected %ld


tool: D17: Dec 31 1969 EST test passed

tool: D38: -unknown-

tool: D99: localtime returned NULL

tool: D76: Dec 31 1969 CET test passed

assistant: ```c
int main(void) {
  struct tm time_str, *tm;
  time_t t;
  char daybuf[20];
  int result;
  time_str.tm_year = 2001 - 1900;
  time_str.tm_mon = 7 - 1;
  time_str.tm_mday = 4;
  time_str.tm_hour = 0;
  time_str.tm_min = 0;
  time_str.tm_sec = 1;
  time_str.tm_isdst = -1;
  if (mktime(&time_str) == -1) {
    (void)puts("-unknown-");
    result = 1;
  } else {
    (void)strftime(daybuf, sizeof(daybuf), "%A", &time_str);
    (void)puts(daybuf);
    result = strcmp(daybuf, "Wednesday") != 0;
  }
  setenv("TZ", "EST+5", 1);
  t = 1 * 60 * 60 + 2 * 60 + 29;
  tm = localtime(&t);
  if (tm == NULL) {
    (void)puts("localtime returned NULL");
    result = 1;
  } else {
    time_str = *tm;
    t = mktime(&time_str);
    if (t != 1 * 60 * 60 + 2 * 60 + 29) {
      printf("mktime returned %ld, expected %d\n", (long)t, 1 * 60 * 60 + 2 * 60 + 29);
      result = 1;
    } else
      (void)puts("Dec 31 1969 EST test passed");
    setenv("TZ", "CET-1", 1);
    t = mktime(&time_str);
    if (t != (1 * 60 * 60 + 2 * 60 + 29 - (5 - -1) * 60 * 60)) {
      printf("mktime returned %ld, expected %ld\n", (long)t, (long)(1 * 60 * 60 + 2 * 60 + 29 - (5 - -1) * 60 * 60));
      result = 1;
    } else
      (void)puts("Dec 31 1969 CET test passed");
  }
  return result;
}
```