user: Please show me the C implementation that matches the assembly code listed below:

```asm
<voidline>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %rbx
  sub    $0x238,%rsp
  mov    %rdi,-0x238(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x18(%rbp)
  xor    %eax,%eax
  mov    -0x238(%rbp),%rax
  mov    %rax,%rdi
  call   <ftell@plt>
  cltq
  mov    %rax,-0x228(%rbp)
  mov    -0x238(%rbp),%rax
  mov    %rax,%rsi
  mov    $0x9,%edi
  call   <fputc@plt>
  mov    -0x238(%rbp),%rax
  mov    %rax,%rdi
  call   <fflush@plt>
  mov    -0x238(%rbp),%rdx
  lea    -0x220(%rbp),%rax
  mov    $0x200,%esi
  mov    %rax,%rdi
  call   <fgets@plt>
  mov    -0x238(%rbp),%rdx
  lea    -0x220(%rbp),%rax
  mov    $0x200,%esi
  mov    %rax,%rdi
  call   <fgets@plt>
  test   %rax,%rax
  je     L98
  movzbl -0x220(%rbp),%eax
  cmp    $0x9,%al
  je     L47
  movzbl -0x220(%rbp),%eax
  cmp    $0xa,%al
  jne    L98
L47:
  mov    D50(%rip),%rax
  mov    (%rax),%ebx
  lea    -0x220(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  not    %eax
  movslq %eax,%rcx
  mov    -0x238(%rbp),%rax
  mov    %ebx,%edx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <fseek@plt>
  mov    -0x238(%rbp),%rax
  mov    %rax,%rsi
  mov    $0x9,%edi
  call   <fputc@plt>
L98:
  mov    -0x238(%rbp),%rax
  mov    %rax,%rdi
  call   <fflush@plt>
  mov    D21(%rip),%rax
  mov    (%rax),%edx
  mov    -0x228(%rbp),%rax
  lea    -0x2(%rax),%rcx
  mov    -0x238(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <fseek@plt>
  jmp    L81
L10:
  mov    -0x238(%rbp),%rax
  mov    %rax,%rdi
  call   <ftell@plt>
  cmp    $0x1,%eax
  jle    L71
  mov    D50(%rip),%rax
  mov    (%rax),%edx
  mov    -0x238(%rbp),%rax
  mov    $0xfffffffffffffffe,%rsi
  mov    %rax,%rdi
  call   <fseek@plt>
L81:
  mov    -0x238(%rbp),%rax
  mov    %rax,%rdi
  call   <fgetc@plt>
  cmp    $0xa,%al
  jne    L10
  jmp    L76
L71:
  nop
L76:
  mov    -0x238(%rbp),%rax
  mov    %rax,%rdi
  call   <fgetc@plt>
  mov    %al,-0x229(%rbp)
  cmpb   $0x9,-0x229(%rbp)
  je     L84
  cmpb   $0xa,-0x229(%rbp)
  jne    L70
L84:
  mov    D50(%rip),%rax
  mov    (%rax),%edx
  mov    -0x238(%rbp),%rax
  mov    $0xffffffffffffffff,%rsi
  mov    %rax,%rdi
  call   <fseek@plt>
  mov    -0x238(%rbp),%rdx
  lea    -0x220(%rbp),%rax
  mov    $0x200,%esi
  mov    %rax,%rdi
  call   <fgets@plt>
  mov    D50(%rip),%rax
  mov    (%rax),%edx
  mov    -0x238(%rbp),%rax
  mov    $0xffffffffffffffff,%rsi
  mov    %rax,%rdi
  call   <fseek@plt>
  mov    -0x238(%rbp),%rax
  mov    %rax,%rsi
  mov    $0x9,%edi
  call   <fputc@plt>
L70:
  mov    -0x238(%rbp),%rax
  mov    %rax,%rdi
  call   <fflush@plt>
  mov    D21(%rip),%rax
  mov    (%rax),%edx
  mov    -0x228(%rbp),%rcx
  mov    -0x238(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <fseek@plt>
  nop
  mov    -0x18(%rbp),%rax
  sub    %fs:0x28,%rax
  je     L60
  call   <__stack_chk_fail@plt>
L60:
  mov    -0x8(%rbp),%rbx
  leave
  ret
```

assistant: ```c
void voidline(FILE *master) {
  char buff[512], ch;
  unsigned long start;
  start = ftell(master);
  fputc('\t', master);
  fflush(master);
  fgets(buff, 512, master);
  if (fgets(buff, 512, master))
    if (buff[0] == '\t' || buff[0] == '\n') {
      fseek(master, -(strlen(buff) + 1), SEEK_CUR);
      fputc('\t', master);
    }
  fflush(master);
  fseek(master, start - 2, SEEK_SET);
  while (fgetc(master) != '\n') {
    if (ftell(master) < 2)
      break;
    fseek(master, -2, SEEK_CUR);
  }
  ch = fgetc(master);
  if (ch == '\t' || ch == '\n') {
    fseek(master, -1, SEEK_CUR);
    fgets(buff, 512, master);
    fseek(master, -1, SEEK_CUR);
    fputc('\t', master);
  }
  fflush(master);
  fseek(master, start, SEEK_SET);
}
```