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

```asm
<get_ffElement>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x40,%rsp
  mov    %rdi,-0x38(%rbp)
  mov    %rsi,-0x40(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  movl   $0x0,-0x28(%rbp)
  movl   $0x0,-0x24(%rbp)
  movl   $0x0,-0x28(%rbp)
  jmp    L89
L90:
  mov    -0x28(%rbp),%eax
  cltq
  movb   $0x20,-0x20(%rbp,%rax,1)
  addl   $0x1,-0x28(%rbp)
L89:
  cmpl   $0x13,-0x28(%rbp)
  jle    L90
  movl   $0x0,-0x28(%rbp)
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  jne    L6
  mov    $0x0,%eax
  jmp    L77
L76:
  addl   $0x1,-0x28(%rbp)
  mov    -0x28(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  test   %al,%al
  jne    L6
  mov    $0x0,%eax
  jmp    L77
L6:
  mov    -0x28(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  mov    %eax,%edi
  call   <isspace@plt>
  test   %eax,%eax
  jne    L76
  jmp    L2
L67:
  mov    -0x28(%rbp),%eax
  lea    0x1(%rax),%edx
  mov    %edx,-0x28(%rbp)
  movslq %eax,%rdx
  mov    -0x38(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  mov    -0x24(%rbp),%eax
  lea    0x1(%rax),%edx
  mov    %edx,-0x24(%rbp)
  movzbl (%rcx),%ecx
  movslq %eax,%rdx
  mov    %cl,-0x20(%rbp,%rdx,1)
  cltq
  movzbl -0x20(%rbp,%rax,1),%eax
  test   %al,%al
  jne    L2
  lea    -0x20(%rbp),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <atof@plt>
  pxor   %xmm0,%xmm0
  cvtsi2sd %eax,%xmm0
  mov    -0x40(%rbp),%rax
  movsd  %xmm0,(%rax)
  mov    -0x38(%rbp),%rax
  movb   $0x0,(%rax)
  mov    $0x1,%eax
  jmp    L77
L2:
  mov    -0x28(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  mov    %eax,%edi
  call   <isspace@plt>
  test   %eax,%eax
  je     L67
  lea    -0x20(%rbp),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <atof@plt>
  pxor   %xmm0,%xmm0
  cvtsi2sd %eax,%xmm0
  mov    -0x40(%rbp),%rax
  movsd  %xmm0,(%rax)
  movl   $0x0,-0x24(%rbp)
  jmp    L59
L3:
  addl   $0x1,-0x24(%rbp)
  addl   $0x1,-0x28(%rbp)
L59:
  mov    -0x28(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x38(%rbp),%rax
  add    %rax,%rdx
  mov    -0x24(%rbp),%eax
  movslq %eax,%rcx
  mov    -0x38(%rbp),%rax
  add    %rcx,%rax
  movzbl (%rdx),%edx
  mov    %dl,(%rax)
  movzbl (%rax),%eax
  test   %al,%al
  jne    L3
  mov    $0x1,%eax
L77:
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L12
  call   <__stack_chk_fail@plt>
L12:
  leave
  ret
```

assistant: ```c
char get_ffElement(Line, Element_p)
char *Line;
double *Element_p;
{
  char first_word[20];
  int i = 0, j = 0;
  for (i = 0; i < 20; i++)
    first_word[i] = ' ';
  i = 0;
  if (*Line == '\0')
    return (0);
  while (isspace(*(Line + i)))
    if (*(Line + (++i)) == '\0')
      return (0);
  while (!isspace(*(Line + i))) {
    if ((first_word[j++] = *(Line + (i++))) == '\0') {
      *Element_p = atof(first_word);
      *Line = '\0';
      return (1);
    }
  }
  *Element_p = atof(first_word);
  for (j = 0; (*(Line + j) = *(Line + i)) != '\0'; ++j, ++i)
    ;
  return (1);
}
```