user: 请显示与下面列出的汇编代码相匹配的C语言实现：

```asm
<timestamp>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbx
  sub    $0x48,%rsp
  mov    %edi,-0x64(%rbp)
  mov    %esi,-0x68(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x38(%rbp)
  xor    %eax,%eax
  movl   $0x0,-0x60(%rbp)
  movq   $0x0,-0x40(%rbp)
  movl   $0x0,-0x5c(%rbp)
  movl   $0x0,-0x58(%rbp)
  movl   $0x1,-0x4c(%rbp)
  movl   $0x0,-0x54(%rbp)
  movl   $0x0,-0x50(%rbp)
  movl   $0x0,-0x48(%rbp)
  movl   $0x0,-0x44(%rbp)
  movb   $0x0,D176(%rip)
  lea    -0x60(%rbp),%rax
  mov    %rax,%rdi
  call   <time@plt>
  lea    -0x60(%rbp),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <localtime@plt>
  mov    %rax,-0x40(%rbp)
  mov    -0x40(%rbp),%rax
  mov    0x28(%rax),%rax
  mov    %eax,-0x5c(%rbp)
  mov    -0x40(%rbp),%rax
  mov    0x20(%rax),%rax
  add    $0x1,%eax
  mov    %eax,-0x54(%rbp)
  mov    -0x40(%rbp),%rax
  mov    0x18(%rax),%rax
  mov    %eax,-0x50(%rbp)
  mov    -0x40(%rbp),%rax
  mov    0x10(%rax),%rax
  mov    %eax,-0x58(%rbp)
  mov    -0x40(%rbp),%rax
  mov    0x8(%rax),%rax
  mov    %eax,-0x48(%rbp)
  mov    -0x40(%rbp),%rax
  mov    (%rax),%rax
  mov    %eax,-0x44(%rbp)
  mov    -0x5c(%rbp),%eax
  add    $0x76c,%eax
  mov    %eax,-0x5c(%rbp)
  lea    -0x58(%rbp),%rdi
  lea    -0x50(%rbp),%rcx
  lea    -0x54(%rbp),%rdx
  lea    -0x5c(%rbp),%rsi
  mov    -0x64(%rbp),%eax
  mov    %rdi,%r8
  mov    %eax,%edi
  mov    $0x0,%eax
  call   <tzadjust@plt>
  mov    -0x58(%rbp),%eax
  test   %eax,%eax
  js     L98
  mov    -0x58(%rbp),%eax
  cmp    $0x17,%eax
  jg     L98
  mov    -0x50(%rbp),%eax
  test   %eax,%eax
  jle    L98
  mov    -0x50(%rbp),%eax
  cmp    $0x1f,%eax
  jg     L98
  mov    -0x54(%rbp),%eax
  test   %eax,%eax
  jle    L98
  mov    -0x54(%rbp),%eax
  cmp    $0xc,%eax
  jg     L98
  mov    -0x5c(%rbp),%eax
  cmp    $0x7b4,%eax
  jle    L98
  mov    -0x58(%rbp),%eax
  cmp    $0xb,%eax
  jg     L159
  movl   $0x0,-0x4c(%rbp)
  mov    -0x58(%rbp),%eax
  test   %eax,%eax
  jne    L159
  movl   $0xc,-0x58(%rbp)
L159:
  mov    -0x58(%rbp),%eax
  cmp    $0xc,%eax
  jle    L223
  mov    -0x58(%rbp),%eax
  sub    $0xc,%eax
  mov    %eax,-0x58(%rbp)
L223:
  nop
  cmpl   $0x4,-0x68(%rbp)
  je     L8
  cmpl   $0x4,-0x68(%rbp)
  jg     L13
  cmpl   $0x3,-0x68(%rbp)
  je     L0
  cmpl   $0x3,-0x68(%rbp)
  jg     L13
  cmpl   $0x1,-0x68(%rbp)
  je     L33
  cmpl   $0x2,-0x68(%rbp)
  je     L176
L13:
  cmpl   $0x0,-0x4c(%rbp)
  je     L246
  lea    D54(%rip),%rax
  jmp    L131
L246:
  lea    D148(%rip),%rax
L131:
  mov    -0x58(%rbp),%edi
  mov    -0x50(%rbp),%esi
  mov    -0x54(%rbp),%ecx
  mov    -0x5c(%rbp),%edx
  sub    $0x8,%rsp
  push   %rax
  mov    -0x44(%rbp),%eax
  push   %rax
  mov    -0x48(%rbp),%eax
  push   %rax
  mov    %edi,%r9d
  mov    %esi,%r8d
  lea    D112(%rip),%rax
  mov    %rax,%rsi
  lea    D176(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <sprintf@plt>
  add    $0x20,%rsp
  jmp    L186
L33:
  mov    -0x5c(%rbp),%r13d
  mov    -0x50(%rbp),%r12d
  mov    -0x54(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  lea    D10(%rip),%rax
  mov    (%rdx,%rax,1),%rbx
  mov    -0x50(%rbp),%edx
  mov    -0x54(%rbp),%ecx
  mov    -0x5c(%rbp),%eax
  mov    %ecx,%esi
  mov    %eax,%edi
  mov    $0x0,%eax
  call   <daynumber@plt>
  movslq %eax,%rdx
  imul   $0xffffffff92492493,%rdx,%rdx
  shr    $0x20,%rdx
  add    %eax,%edx
  sar    $0x2,%edx
  mov    %eax,%ecx
  sar    $0x1f,%ecx
  sub    %ecx,%edx
  mov    %edx,%ecx
  shl    $0x3,%ecx
  sub    %edx,%ecx
  sub    %ecx,%eax
  mov    %eax,%edx
  movslq %edx,%rax
  lea    0x0(,%rax,8),%rdx
  lea    D101(%rip),%rax
  mov    (%rdx,%rax,1),%rax
  mov    %r13d,%r9d
  mov    %r12d,%r8d
  mov    %rbx,%rcx
  mov    %rax,%rdx
  lea    D162(%rip),%rax
  mov    %rax,%rsi
  lea    D176(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <sprintf@plt>
  jmp    L186
L176:
  cmpl   $0x0,-0x4c(%rbp)
  je     L263
  lea    D54(%rip),%rbx
  jmp    L113
L263:
  lea    D148(%rip),%rbx
L113:
  mov    -0x58(%rbp),%r13d
  mov    -0x5c(%rbp),%r15d
  mov    -0x50(%rbp),%r14d
  mov    -0x54(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  lea    D10(%rip),%rax
  mov    (%rdx,%rax,1),%r12
  mov    -0x50(%rbp),%edx
  mov    -0x54(%rbp),%ecx
  mov    -0x5c(%rbp),%eax
  mov    %ecx,%esi
  mov    %eax,%edi
  mov    $0x0,%eax
  call   <daynumber@plt>
  movslq %eax,%rdx
  imul   $0xffffffff92492493,%rdx,%rdx
  shr    $0x20,%rdx
  add    %eax,%edx
  sar    $0x2,%edx
  mov    %eax,%ecx
  sar    $0x1f,%ecx
  sub    %ecx,%edx
  mov    %edx,%ecx
  shl    $0x3,%ecx
  sub    %edx,%ecx
  sub    %ecx,%eax
  mov    %eax,%edx
  movslq %edx,%rax
  lea    0x0(,%rax,8),%rdx
  lea    D101(%rip),%rax
  mov    (%rdx,%rax,1),%rax
  push   %rbx
  mov    -0x44(%rbp),%edx
  push   %rdx
  mov    -0x48(%rbp),%edx
  push   %rdx
  push   %r13
  mov    %r15d,%r9d
  mov    %r14d,%r8d
  mov    %r12,%rcx
  mov    %rax,%rdx
  lea    D34(%rip),%rax
  mov    %rax,%rsi
  lea    D176(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <sprintf@plt>
  add    $0x20,%rsp
  jmp    L186
L0:
  cmpl   $0x0,-0x4c(%rbp)
  je     L262
  lea    D54(%rip),%rax
  jmp    L251
L262:
  lea    D148(%rip),%rax
L251:
  mov    -0x58(%rbp),%edx
  mov    -0x44(%rbp),%esi
  mov    -0x48(%rbp),%ecx
  mov    %rax,%r9
  mov    %esi,%r8d
  lea    D83(%rip),%rax
  mov    %rax,%rsi
  lea    D176(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <sprintf@plt>
  jmp    L186
L8:
  mov    -0x58(%rbp),%esi
  mov    -0x50(%rbp),%edx
  mov    -0x54(%rbp),%eax
  mov    -0x48(%rbp),%edi
  sub    $0x8,%rsp
  mov    -0x44(%rbp),%ecx
  push   %rcx
  mov    %edi,%r9d
  mov    %esi,%r8d
  mov    %edx,%ecx
  mov    %eax,%edx
  lea    D211(%rip),%rax
  mov    %rax,%rsi
  lea    D176(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <sprintf@plt>
  add    $0x10,%rsp
  jmp    L186
L98:
  nop
L186:
  lea    D176(%rip),%rax
  mov    -0x38(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L101
  call   <__stack_chk_fail@plt>
L101:
  lea    -0x28(%rbp),%rsp
  pop    %rbx
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  pop    %rbp
  ret
```

tool_calls: name: read_data
arguments: data_label: D54
data_type: string
name: read_data
arguments: data_label: D148
data_type: string
name: read_data
arguments: data_label: D112
data_type: string
name: read_data
arguments: data_label: D162
data_type: string
name: read_data
arguments: data_label: D34
data_type: string
name: read_data
arguments: data_label: D83
data_type: string
name: read_data
arguments: data_label: D211
data_type: string

tool: D54: pm

tool: D148: am

tool: D112: %04d-%02d-%02d:%02d:%02d:%02d%s

tool: D162: %s, %s %d, %d

tool: D34: %s, %s %d, %d, %d:%02d:%02d%s

tool: D83: %d:%02d:%02d%s

tool: D211: %d%02d%02d%02d%02d

assistant: ```c
char *timestamp(int tzdelta, int ifmt) {
  static char timebuff[256];
  time_t time_val = (time_t)(0);
  struct tm *tmstruct = (struct tm *)NULL, *localtime();
  int year = 0, hour = 0, ispm = 1, month = 0, day = 0, minute = 0, second = 0;
  int tzadjust();
  int daynumber();
  static char *daynames[] = {"Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"};
  static char *monthnames[] = {"?", "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December", "?"};
  *timebuff = '\000';
  time((time_t *)(&time_val));
  tmstruct = localtime((time_t *)(&time_val));
  year = (int)(tmstruct->tm_year);
  month = (int)(tmstruct->tm_mon) + 1;
  day = (int)(tmstruct->tm_mday);
  hour = (int)(tmstruct->tm_hour);
  minute = (int)(tmstruct->tm_min);
  second = (int)(tmstruct->tm_sec);
  year += 1900;
  tzadjust(tzdelta, &year, &month, &day, &hour);
  if (hour < 0 || hour > 23 || day < 1 || day > 31 || month < 1 || month > 12 || year < 1973)
    goto end_of_job;
  switch (ifmt) {
  default:
  case 0:
    if (hour < 12) {
      ispm = 0;
      if (hour == 0)
        hour = 12;
    }
    if (hour > 12)
      hour -= 12;
    break;
  }
  switch (ifmt) {
  default:
  case 0:
    sprintf(timebuff, "%04d-%02d-%02d:%02d:%02d:%02d%s", year, month, day, hour, minute, second, ((ispm) ? "pm" : "am"));
    break;
  case 1:
    sprintf(timebuff, "%s, %s %d, %d", daynames[daynumber(year, month, day) % 7], monthnames[month], day, year);
    break;
  case 2:
    sprintf(timebuff, "%s, %s %d, %d, %d:%02d:%02d%s", daynames[daynumber(year, month, day) % 7], monthnames[month], day, year, hour, minute, second, ((ispm) ? "pm" : "am"));
    break;
  case 3:
    sprintf(timebuff, "%d:%02d:%02d%s", hour, minute, second, ((ispm) ? "pm" : "am"));
    break;
  case 4:
    sprintf(timebuff, "%d%02d%02d%02d%02d", month, day, hour, minute, second);
    break;
  }
end_of_job:
  return (timebuff);
}
```