user: What is the c source code of the assembly code below:

```asm
<register_builtin_macros>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x70,%rsp
  mov    %rdi,-0x68(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  mov    $0x0,%edi
  call   <time@plt>
  mov    %eax,-0x5c(%rbp)
  lea    -0x5c(%rbp),%rax
  mov    %rax,%rdi
  call   <localtime@plt>
  mov    %rax,-0x58(%rbp)
  mov    -0x68(%rbp),%rax
  lea    D4(%rip),%rdx
  lea    D28(%rip),%rcx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <register_builtin_macro@plt>
  mov    -0x68(%rbp),%rax
  lea    D65(%rip),%rdx
  lea    D132(%rip),%rcx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <register_builtin_macro@plt>
  mov    -0x68(%rbp),%rax
  lea    D139(%rip),%rdx
  lea    D96(%rip),%rcx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <register_builtin_macro@plt>
  mov    -0x68(%rbp),%rax
  lea    D23(%rip),%rdx
  lea    D159(%rip),%rcx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <register_builtin_macro@plt>
  mov    -0x58(%rbp),%rdx
  lea    -0x30(%rbp),%rax
  mov    %rdx,%rcx
  lea    D118(%rip),%rdx
  mov    $0x1e,%esi
  mov    %rax,%rdi
  call   <strftime@plt>
  lea    -0x30(%rbp),%rdx
  lea    -0x50(%rbp),%rax
  lea    D56(%rip),%rcx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <sprintf@plt>
  lea    -0x50(%rbp),%rdx
  mov    -0x68(%rbp),%rax
  lea    D113(%rip),%rcx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <register_builtin_macro@plt>
  mov    -0x58(%rbp),%rdx
  lea    -0x30(%rbp),%rax
  mov    %rdx,%rcx
  lea    D173(%rip),%rdx
  mov    $0x1e,%esi
  mov    %rax,%rdi
  call   <strftime@plt>
  lea    -0x30(%rbp),%rdx
  lea    -0x50(%rbp),%rax
  lea    D56(%rip),%rcx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <sprintf@plt>
  lea    -0x50(%rbp),%rdx
  mov    -0x68(%rbp),%rax
  lea    D33(%rip),%rcx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <register_builtin_macro@plt>
  mov    -0x68(%rbp),%rax
  lea    D4(%rip),%rdx
  lea    D123(%rip),%rcx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <register_builtin_macro@plt>
  mov    -0x68(%rbp),%rax
  lea    D121(%rip),%rdx
  lea    D86(%rip),%rcx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <register_builtin_macro@plt>
  nop
  mov    -0x8(%rbp),%rax
  sub    %fs:0x28,%rax
  je     L4
  call   <__stack_chk_fail@plt>
L4:
  leave
  ret
```

tool_calls: name: disassemble_data
arguments: data_tag: D4
datatype: string
name: disassemble_data
arguments: data_tag: D28
datatype: string
name: disassemble_data
arguments: data_tag: D65
datatype: string
name: disassemble_data
arguments: data_tag: D132
datatype: string
name: disassemble_data
arguments: data_tag: D139
datatype: string
name: disassemble_data
arguments: data_tag: D96
datatype: string
name: disassemble_data
arguments: data_tag: D23
datatype: string
name: disassemble_data
arguments: data_tag: D159
datatype: string
name: disassemble_data
arguments: data_tag: D118
datatype: string
name: disassemble_data
arguments: data_tag: D56
datatype: string
name: disassemble_data
arguments: data_tag: D113
datatype: string
name: disassemble_data
arguments: data_tag: D173
datatype: string
name: disassemble_data
arguments: data_tag: D33
datatype: string
name: disassemble_data
arguments: data_tag: D123
datatype: string
name: disassemble_data
arguments: data_tag: D121
datatype: string
name: disassemble_data
arguments: data_tag: D86
datatype: string

tool: D4: 0

tool: D28: __ROMCC__

tool: D65: 72

tool: D132: __ROMCC_MINOR__

tool: D139: "This should be the filename"

tool: D96: __FILE__

tool: D23: 54321

tool: D159: __LINE__

tool: D118: %b %e %Y

tool: D56: "%s"

tool: D113: __DATE__

tool: D173: %H:%M:%S

tool: D33: __TIME__

tool: D123: __STDC__

tool: D121: 199901L

tool: D86: __STDC_VERSION__

assistant: ```c
void register_builtin_macros(struct compile_state *state) {
  char buf[30];
  char scratch[30];
  time_t now;
  struct tm *tm;
  now = time(NULL);
  tm = localtime(&now);
  register_builtin_macro(state, "__ROMCC__", "0");
  register_builtin_macro(state, "__ROMCC_MINOR__", "72");
  register_builtin_macro(state, "__FILE__", "\"This should be the filename\"");
  register_builtin_macro(state, "__LINE__", "54321");
  strftime(scratch, sizeof(scratch), "%b %e %Y", tm);
  sprintf(buf, "\"%s\"", scratch);
  register_builtin_macro(state, "__DATE__", buf);
  strftime(scratch, sizeof(scratch), "%H:%M:%S", tm);
  sprintf(buf, "\"%s\"", scratch);
  register_builtin_macro(state, "__TIME__", buf);
  register_builtin_macro(state, "__STDC__", "0");
  register_builtin_macro(state, "__STDC_VERSION__", "199901L");
}
```