user: 请将这段汇编代码片段转换成等效的C代码：

```asm
<Decode_date_output_format>:
  endbr64
  push   %r15
  mov    $0x10,%edx
  push   %r14
  push   %r13
  push   %r12
  mov    %rdi,%r12
  push   %rbp
  mov    %rsi,%rbp
  xor    %esi,%esi
  push   %rbx
  sub    $0x48,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x38(%rsp)
  xor    %eax,%eax
  movl   $0x0,0x28(%rsp)
  movq   $0x0,0x30(%rsp)
  call   <memset@plt>
  lea    0x28(%rsp),%rax
  xor    %r8d,%r8d
  mov    %rbp,%rsi
  movl   $0xffffffff,(%r12)
  lea    0x30(%rsp),%rcx
  mov    %rax,%rdx
  lea    D16(%rip),%rdi
  mov    %rcx,0x18(%rsp)
  mov    %rax,0x10(%rsp)
  call   <Sfile_make_argv@plt>
  mov    %eax,%r13d
  test   %eax,%eax
  jle    L235
  cmpl   $0x1,0x28(%rsp)
  jle    L78
  movl   $0x0,0xc(%rsp)
  xor    %r14d,%r14d
  xor    %ebp,%ebp
  xor    %r13d,%r13d
  mov    $0x8,%r15d
  mov    $0x1,%ebx
  nopw   0x0(%rax,%rax,1)
L34:
  mov    0x30(%rsp),%rdx
  mov    (%rdx,%r15,1),%rdi
  test   %ebp,%ebp
  je     L151
L91:
  mov    (%rdx,%r15,1),%rdi
  test   %r14d,%r14d
  je     L109
  mov    0xc(%rsp),%eax
  mov    (%rdx,%r15,1),%rdi
  test   %eax,%eax
  je     L167
L251:
  mov    (%rdx,%r15,1),%rdi
  test   %r13d,%r13d
  jne    L187
  xor    %esi,%esi
  call   <Decode_date_year@plt>
  mov    0x30(%rsp),%rdx
  test   %eax,%eax
  jg     L247
L187:
  mov    (%rdx,%r15,1),%rdi
  mov    %r12,%rsi
  xor    %edx,%edx
  call   <Decode_date_timezone@plt>
  test   %eax,%eax
  js     L7
L265:
  add    $0x1,%ebx
  cmp    %ebx,0x28(%rsp)
  jle    L178
L111:
  add    $0x8,%r15
  test   %ebp,%ebp
  je     L34
  movslq %ebx,%rax
  shl    $0x3,%rax
  mov    %rax,%r15
  jmp    L158
  nopl   0x0(%rax)
L151:
  xor    %esi,%esi
  call   <Decode_date_month@plt>
  mov    0x30(%rsp),%rdx
  test   %eax,%eax
  js     L91
  mov    %eax,0x4(%r12)
  add    $0x1,%ebx
  cmp    %ebx,0x28(%rsp)
  jle    L22
  add    $0x8,%r15
  mov    $0x1,%ebp
  jmp    L34
  nopl   0x0(%rax)
L109:
  xor    %esi,%esi
  call   <Decode_date_mday@plt>
  test   %eax,%eax
  jg     L199
  cmp    $0xfffffffe,%eax
  je     L78
  mov    0x30(%rsp),%rdx
  mov    0xc(%rsp),%eax
  mov    (%rdx,%r15,1),%rdi
  test   %eax,%eax
  jne    L251
L167:
  xor    %edx,%edx
  mov    %r12,%rsi
  call   <Decode_date_hms@plt>
  test   %eax,%eax
  jg     L53
  mov    0x30(%rsp),%rdx
  jmp    L251
  nopl   (%rax)
L7:
  mov    0x30(%rsp),%rax
  xor    %esi,%esi
  mov    (%rax,%r15,1),%rdi
  call   <Decode_date_weekday@plt>
  test   %eax,%eax
  jns    L265
L78:
  xor    %r13d,%r13d
L235:
  mov    0x18(%rsp),%rcx
  lea    D18(%rip),%rdi
  mov    0x10(%rsp),%rdx
  mov    $0x2,%r8d
  mov    %rdi,%rsi
  call   <Sfile_make_argv@plt>
  mov    0x38(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L27
  add    $0x48,%rsp
  mov    %r13d,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   0x0(%rax,%rax,1)
L247:
  sub    $0x76c,%eax
  mov    $0x1,%r13d
  add    $0x1,%ebx
  mov    %eax,0xc(%r12)
  cmp    %ebx,0x28(%rsp)
  jg     L111
  nopl   (%rax)
L178:
  xor    $0x1,%r14d
  xor    $0x1,%ebp
  or     %ebp,%r14d
  jne    L78
  test   %r13d,%r13d
  jne    L235
  xor    %edi,%edi
  mov    $0x1,%r13d
  call   <time@plt>
  lea    0x2c(%rsp),%rdi
  mov    %eax,0x2c(%rsp)
  call   <localtime@plt>
  mov    0xc(%rax),%eax
  mov    %eax,0xc(%r12)
  jmp    L235
  nopl   0x0(%rax)
L199:
  mov    %eax,0x8(%r12)
  mov    $0x1,%r14d
  jmp    L265
L53:
  movl   $0x1,0xc(%rsp)
  jmp    L265
L22:
  mov    $0x1,%ebp
  jmp    L178
L27:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: read_data
arguments: label: D16
type: string
name: read_data
arguments: label: D18
type: string

tool: D16: xorriso

tool: 

assistant: ```c
int Decode_date_output_format(struct tm *erg, char *text, int flag) {
  int ret, i, argc = 0, seen_year = 0, seen_month = 0, seen_day = 0, seen_time = 0;
  char **argv = NULL;
  struct tm *now;
  time_t timep;
  memset(erg, 0, sizeof(*erg));
  erg->tm_isdst = -1;
  ret = Sfile_make_argv("xorriso", text, &argc, &argv, 0);
  if (ret <= 0)
    goto ex;
  for (i = 1; i < argc; i++) {
    if (!seen_month) {
      ret = Decode_date_month(argv[i], 0);
      if (ret >= 0) {
        seen_month = 1;
        erg->tm_mon = ret;
        continue;
      }
    }
    if (!seen_day) {
      ret = Decode_date_mday(argv[i], 0);
      if (ret > 0) {
        seen_day = 1;
        erg->tm_mday = ret;
        continue;
      }
      if (ret == -2) {
        ret = 0;
        goto ex;
      }
    }
    if (!seen_time) {
      ret = Decode_date_hms(argv[i], erg, 0);
      if (ret > 0) {
        seen_time = 1;
        continue;
      }
    }
    if (!seen_year) {
      ret = Decode_date_year(argv[i], 0);
      if (ret > 0) {
        erg->tm_year = ret - 1900;
        seen_year = 1;
        continue;
      }
    }
    ret = Decode_date_timezone(argv[i], erg, 0);
    if (ret >= 0)
      continue;
    ret = Decode_date_weekday(argv[i], 0);
    if (ret >= 0)
      continue;
    {
      ret = 0;
      goto ex;
    }
  }
  if (!(seen_day && seen_month)) {
    ret = 0;
    goto ex;
  }
  if (!seen_year) {
    timep = time(NULL);
    now = localtime(&timep);
    erg->tm_year = now->tm_year;
  }
  ret = 1;
ex:
  Sfile_make_argv("", "", &argc, &argv, 2);
  return (ret);
}
```