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

```asm
<main>:
  endbr64
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  lea    D20(%rip),%rsi
  lea    D31(%rip),%rdi
  call   <fopen@plt>
  test   %rax,%rax
  je     L30
  mov    %rax,%rbp
  mov    $0x0,%ebx
L34:
  mov    %rbp,%rsi
  mov    %ebx,%edi
  call   <fputc@plt>
  add    $0x1,%ebx
  cmp    $0xff,%ebx
  jne    L34
  mov    %rbp,%rdi
  call   <fclose@plt>
  lea    D20(%rip),%rsi
  lea    D2(%rip),%rdi
  call   <fopen@plt>
  mov    %rax,%rbx
  test   %rax,%rax
  je     L14
  mov    %rax,%rsi
  mov    $0xff,%edi
  call   <fputc@plt>
  mov    %rbx,%rsi
  mov    $0xff,%edi
  call   <fputc@plt>
  mov    %rbx,%rsi
  mov    $0xff,%edi
  call   <fputc@plt>
  mov    %rbx,%rsi
  mov    $0xff,%edi
  call   <fputc@plt>
  mov    %rbx,%rsi
  mov    $0x0,%edi
  call   <fputc@plt>
  mov    %rbx,%rsi
  mov    $0x0,%edi
  call   <fputc@plt>
  mov    %rbx,%rsi
  mov    $0x0,%edi
  call   <fputc@plt>
  mov    %rbx,%rsi
  mov    $0x0,%edi
  call   <fputc@plt>
  mov    %rbx,%rsi
  mov    $0xff,%edi
  call   <fputc@plt>
  mov    %rbx,%rsi
  mov    $0xff,%edi
  call   <fputc@plt>
  mov    %rbx,%rsi
  mov    $0xff,%edi
  call   <fputc@plt>
  mov    %rbx,%rsi
  mov    $0xff,%edi
  call   <fputc@plt>
  mov    %rbx,%rsi
  mov    $0x0,%edi
  call   <fputc@plt>
  mov    %rbx,%rsi
  mov    $0x0,%edi
  call   <fputc@plt>
  mov    %rbx,%rsi
  mov    $0x0,%edi
  call   <fputc@plt>
  mov    %rbx,%rsi
  mov    $0x0,%edi
  call   <fputc@plt>
  mov    %rbx,%rsi
  mov    $0xff,%edi
  call   <fputc@plt>
  mov    %rbx,%rsi
  mov    $0xff,%edi
  call   <fputc@plt>
  mov    %rbx,%rsi
  mov    $0xff,%edi
  call   <fputc@plt>
  mov    %rbx,%rsi
  mov    $0xff,%edi
  call   <fputc@plt>
  mov    %rbx,%rsi
  mov    $0x0,%edi
  call   <fputc@plt>
  mov    %rbx,%rsi
  mov    $0x0,%edi
  call   <fputc@plt>
  mov    %rbx,%rsi
  mov    $0x0,%edi
  call   <fputc@plt>
  mov    %rbx,%rsi
  mov    $0x0,%edi
  call   <fputc@plt>
  mov    %rbx,%rsi
  mov    $0xff,%edi
  call   <fputc@plt>
  mov    %rbx,%rsi
  mov    $0xff,%edi
  call   <fputc@plt>
  mov    %rbx,%rsi
  mov    $0xff,%edi
  call   <fputc@plt>
  mov    %rbx,%rsi
  mov    $0xff,%edi
  call   <fputc@plt>
  mov    %rbx,%rsi
  mov    $0x0,%edi
  call   <fputc@plt>
  mov    %rbx,%rsi
  mov    $0x0,%edi
  call   <fputc@plt>
  mov    %rbx,%rsi
  mov    $0x0,%edi
  call   <fputc@plt>
  mov    %rbx,%rsi
  mov    $0x0,%edi
  call   <fputc@plt>
  mov    %rbx,%rdi
  call   <fclose@plt>
  mov    $0x0,%eax
L22:
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  ret
L30:
  mov    $0xffffffff,%eax
  jmp    L22
L14:
  mov    $0xffffffff,%eax
  jmp    L22
```

tool_calls: name: unpack_data
arguments: data_label: D20
datatype: string
name: unpack_data
arguments: data_label: D31
datatype: string
name: unpack_data
arguments: data_label: D2
datatype: string

tool: D20: w

tool: D31: ./.testbytes

tool: D2: ./.testbits

assistant: ```c
int main(void) {
  int i;
  FILE *fp;
  fp = fopen("./.testbytes", "w");
  if (!fp) {
    return -1;
  }
  for (i = 0; i < 255; i++) {
    fputc(i, fp);
  }
  fclose(fp);
  fp = fopen("./.testbits", "w");
  if (!fp) {
    return -1;
  }
  fputc(0xFF, fp);
  fputc(0xFF, fp);
  fputc(0xFF, fp);
  fputc(0xFF, fp);
  fputc(0x00, fp);
  fputc(0x00, fp);
  fputc(0x00, fp);
  fputc(0x00, fp);
  fputc(0xFF, fp);
  fputc(0xFF, fp);
  fputc(0xFF, fp);
  fputc(0xFF, fp);
  fputc(0x00, fp);
  fputc(0x00, fp);
  fputc(0x00, fp);
  fputc(0x00, fp);
  fputc(0xFF, fp);
  fputc(0xFF, fp);
  fputc(0xFF, fp);
  fputc(0xFF, fp);
  fputc(0x00, fp);
  fputc(0x00, fp);
  fputc(0x00, fp);
  fputc(0x00, fp);
  fputc(0xFF, fp);
  fputc(0xFF, fp);
  fputc(0xFF, fp);
  fputc(0xFF, fp);
  fputc(0x00, fp);
  fputc(0x00, fp);
  fputc(0x00, fp);
  fputc(0x00, fp);
  fclose(fp);
}
```