user: 请将以下的汇编代码转换成C语言代码:

```asm
<CAST_cfb64_encrypt>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  add    $0xffffffffffffff80,%rsp
  mov    %rdi,-0x58(%rbp)
  mov    %rsi,-0x60(%rbp)
  mov    %rdx,-0x68(%rbp)
  mov    %rcx,-0x70(%rbp)
  mov    %r8,-0x78(%rbp)
  mov    %r9,-0x80(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  mov    -0x80(%rbp),%rax
  mov    (%rax),%eax
  mov    %eax,-0x4c(%rbp)
  mov    -0x68(%rbp),%rax
  mov    %rax,-0x48(%rbp)
  mov    -0x78(%rbp),%rax
  mov    %rax,-0x40(%rbp)
  cmpl   $0x0,0x10(%rbp)
  je     L63
  jmp    L42
L74:
  cmpl   $0x0,-0x4c(%rbp)
  jne    L38
  mov    -0x40(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x40(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%eax
  shl    $0x18,%rax
  mov    %rax,-0x38(%rbp)
  mov    -0x40(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x40(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%eax
  shl    $0x10,%rax
  or     %rax,-0x38(%rbp)
  mov    -0x40(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x40(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%eax
  shl    $0x8,%rax
  or     %rax,-0x38(%rbp)
  mov    -0x40(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x40(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%eax
  or     %rax,-0x38(%rbp)
  mov    -0x38(%rbp),%rax
  mov    %rax,-0x20(%rbp)
  mov    -0x40(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x40(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%eax
  shl    $0x18,%rax
  mov    %rax,-0x30(%rbp)
  mov    -0x40(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x40(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%eax
  shl    $0x10,%rax
  or     %rax,-0x30(%rbp)
  mov    -0x40(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x40(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%eax
  shl    $0x8,%rax
  or     %rax,-0x30(%rbp)
  mov    -0x40(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x40(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%eax
  or     %rax,-0x30(%rbp)
  mov    -0x30(%rbp),%rax
  mov    %rax,-0x18(%rbp)
  mov    -0x70(%rbp),%rdx
  lea    -0x20(%rbp),%rax
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <CAST_encrypt@plt>
  mov    -0x78(%rbp),%rax
  mov    %rax,-0x40(%rbp)
  mov    -0x20(%rbp),%rax
  mov    %rax,-0x28(%rbp)
  mov    -0x28(%rbp),%rax
  shr    $0x18,%rax
  mov    %rax,%rcx
  mov    -0x40(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x40(%rbp)
  mov    %ecx,%edx
  mov    %dl,(%rax)
  mov    -0x28(%rbp),%rax
  shr    $0x10,%rax
  mov    %rax,%rcx
  mov    -0x40(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x40(%rbp)
  mov    %ecx,%edx
  mov    %dl,(%rax)
  mov    -0x28(%rbp),%rax
  shr    $0x8,%rax
  mov    %rax,%rcx
  mov    -0x40(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x40(%rbp)
  mov    %ecx,%edx
  mov    %dl,(%rax)
  mov    -0x40(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x40(%rbp)
  mov    -0x28(%rbp),%rdx
  mov    %dl,(%rax)
  mov    -0x18(%rbp),%rax
  mov    %rax,-0x28(%rbp)
  mov    -0x28(%rbp),%rax
  shr    $0x18,%rax
  mov    %rax,%rcx
  mov    -0x40(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x40(%rbp)
  mov    %ecx,%edx
  mov    %dl,(%rax)
  mov    -0x28(%rbp),%rax
  shr    $0x10,%rax
  mov    %rax,%rcx
  mov    -0x40(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x40(%rbp)
  mov    %ecx,%edx
  mov    %dl,(%rax)
  mov    -0x28(%rbp),%rax
  shr    $0x8,%rax
  mov    %rax,%rcx
  mov    -0x40(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x40(%rbp)
  mov    %ecx,%edx
  mov    %dl,(%rax)
  mov    -0x40(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x40(%rbp)
  mov    -0x28(%rbp),%rdx
  mov    %dl,(%rax)
  mov    -0x78(%rbp),%rax
  mov    %rax,-0x40(%rbp)
L38:
  mov    -0x58(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x58(%rbp)
  movzbl (%rax),%edx
  mov    -0x4c(%rbp),%eax
  movslq %eax,%rcx
  mov    -0x40(%rbp),%rax
  add    %rcx,%rax
  movzbl (%rax),%eax
  xor    %edx,%eax
  mov    %al,-0x4d(%rbp)
  mov    -0x60(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x60(%rbp)
  movzbl -0x4d(%rbp),%edx
  mov    %dl,(%rax)
  mov    -0x4c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x40(%rbp),%rax
  add    %rax,%rdx
  movzbl -0x4d(%rbp),%eax
  mov    %al,(%rdx)
  mov    -0x4c(%rbp),%eax
  add    $0x1,%eax
  and    $0x7,%eax
  mov    %eax,-0x4c(%rbp)
L42:
  mov    -0x48(%rbp),%rax
  lea    -0x1(%rax),%rdx
  mov    %rdx,-0x48(%rbp)
  test   %rax,%rax
  jne    L74
  jmp    L17
L5:
  cmpl   $0x0,-0x4c(%rbp)
  jne    L25
  mov    -0x40(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x40(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%eax
  shl    $0x18,%rax
  mov    %rax,-0x38(%rbp)
  mov    -0x40(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x40(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%eax
  shl    $0x10,%rax
  or     %rax,-0x38(%rbp)
  mov    -0x40(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x40(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%eax
  shl    $0x8,%rax
  or     %rax,-0x38(%rbp)
  mov    -0x40(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x40(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%eax
  or     %rax,-0x38(%rbp)
  mov    -0x38(%rbp),%rax
  mov    %rax,-0x20(%rbp)
  mov    -0x40(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x40(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%eax
  shl    $0x18,%rax
  mov    %rax,-0x30(%rbp)
  mov    -0x40(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x40(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%eax
  shl    $0x10,%rax
  or     %rax,-0x30(%rbp)
  mov    -0x40(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x40(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%eax
  shl    $0x8,%rax
  or     %rax,-0x30(%rbp)
  mov    -0x40(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x40(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%eax
  or     %rax,-0x30(%rbp)
  mov    -0x30(%rbp),%rax
  mov    %rax,-0x18(%rbp)
  mov    -0x70(%rbp),%rdx
  lea    -0x20(%rbp),%rax
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <CAST_encrypt@plt>
  mov    -0x78(%rbp),%rax
  mov    %rax,-0x40(%rbp)
  mov    -0x20(%rbp),%rax
  mov    %rax,-0x28(%rbp)
  mov    -0x28(%rbp),%rax
  shr    $0x18,%rax
  mov    %rax,%rcx
  mov    -0x40(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x40(%rbp)
  mov    %ecx,%edx
  mov    %dl,(%rax)
  mov    -0x28(%rbp),%rax
  shr    $0x10,%rax
  mov    %rax,%rcx
  mov    -0x40(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x40(%rbp)
  mov    %ecx,%edx
  mov    %dl,(%rax)
  mov    -0x28(%rbp),%rax
  shr    $0x8,%rax
  mov    %rax,%rcx
  mov    -0x40(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x40(%rbp)
  mov    %ecx,%edx
  mov    %dl,(%rax)
  mov    -0x40(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x40(%rbp)
  mov    -0x28(%rbp),%rdx
  mov    %dl,(%rax)
  mov    -0x18(%rbp),%rax
  mov    %rax,-0x28(%rbp)
  mov    -0x28(%rbp),%rax
  shr    $0x18,%rax
  mov    %rax,%rcx
  mov    -0x40(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x40(%rbp)
  mov    %ecx,%edx
  mov    %dl,(%rax)
  mov    -0x28(%rbp),%rax
  shr    $0x10,%rax
  mov    %rax,%rcx
  mov    -0x40(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x40(%rbp)
  mov    %ecx,%edx
  mov    %dl,(%rax)
  mov    -0x28(%rbp),%rax
  shr    $0x8,%rax
  mov    %rax,%rcx
  mov    -0x40(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x40(%rbp)
  mov    %ecx,%edx
  mov    %dl,(%rax)
  mov    -0x40(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x40(%rbp)
  mov    -0x28(%rbp),%rdx
  mov    %dl,(%rax)
  mov    -0x78(%rbp),%rax
  mov    %rax,-0x40(%rbp)
L25:
  mov    -0x58(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x58(%rbp)
  movzbl (%rax),%eax
  mov    %al,-0x4e(%rbp)
  mov    -0x4c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x40(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  mov    %al,-0x4d(%rbp)
  mov    -0x4c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x40(%rbp),%rax
  add    %rax,%rdx
  movzbl -0x4e(%rbp),%eax
  mov    %al,(%rdx)
  mov    -0x60(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x60(%rbp)
  movzbl -0x4d(%rbp),%edx
  xor    -0x4e(%rbp),%dl
  mov    %dl,(%rax)
  mov    -0x4c(%rbp),%eax
  add    $0x1,%eax
  and    $0x7,%eax
  mov    %eax,-0x4c(%rbp)
L63:
  mov    -0x48(%rbp),%rax
  lea    -0x1(%rax),%rdx
  mov    %rdx,-0x48(%rbp)
  test   %rax,%rax
  jne    L5
L17:
  movb   $0x0,-0x4e(%rbp)
  movzbl -0x4e(%rbp),%eax
  mov    %al,-0x4d(%rbp)
  movzbl -0x4d(%rbp),%eax
  mov    %rax,-0x28(%rbp)
  mov    -0x28(%rbp),%rax
  mov    %rax,-0x18(%rbp)
  mov    -0x18(%rbp),%rax
  mov    %rax,-0x20(%rbp)
  mov    -0x20(%rbp),%rax
  mov    %rax,-0x30(%rbp)
  mov    -0x30(%rbp),%rax
  mov    %rax,-0x38(%rbp)
  mov    -0x80(%rbp),%rax
  mov    -0x4c(%rbp),%edx
  mov    %edx,(%rax)
  nop
  mov    -0x8(%rbp),%rax
  sub    %fs:0x28,%rax
  je     L13
  call   <__stack_chk_fail@plt>
L13:
  leave
  ret
```

assistant: ```c
void CAST_cfb64_encrypt(const unsigned char *in, unsigned char *out, long length, const CAST_KEY *schedule, unsigned char *ivec, int *num, int enc) {
  CAST_LONG v0, v1, t;
  int n = *num;
  long l = length;
  CAST_LONG ti[2];
  unsigned char *iv, c, cc;
  iv = ivec;
  if (enc) {
    while (l--) {
      if (n == 0) {
        (v0 = ((unsigned long)(*((iv)++))) << 24L, v0 |= ((unsigned long)(*((iv)++))) << 16L, v0 |= ((unsigned long)(*((iv)++))) << 8L, v0 |= ((unsigned long)(*((iv)++))));
        ti[0] = v0;
        (v1 = ((unsigned long)(*((iv)++))) << 24L, v1 |= ((unsigned long)(*((iv)++))) << 16L, v1 |= ((unsigned long)(*((iv)++))) << 8L, v1 |= ((unsigned long)(*((iv)++))));
        ti[1] = v1;
        CAST_encrypt((CAST_LONG *)ti, schedule);
        iv = ivec;
        t = ti[0];
        (*((iv)++) = (unsigned char)(((t) >> 24L) & 0xff), *((iv)++) = (unsigned char)(((t) >> 16L) & 0xff), *((iv)++) = (unsigned char)(((t) >> 8L) & 0xff), *((iv)++) = (unsigned char)(((t)) & 0xff));
        t = ti[1];
        (*((iv)++) = (unsigned char)(((t) >> 24L) & 0xff), *((iv)++) = (unsigned char)(((t) >> 16L) & 0xff), *((iv)++) = (unsigned char)(((t) >> 8L) & 0xff), *((iv)++) = (unsigned char)(((t)) & 0xff));
        iv = ivec;
      }
      c = *(in++) ^ iv[n];
      *(out++) = c;
      iv[n] = c;
      n = (n + 1) & 0x07;
    }
  } else {
    while (l--) {
      if (n == 0) {
        (v0 = ((unsigned long)(*((iv)++))) << 24L, v0 |= ((unsigned long)(*((iv)++))) << 16L, v0 |= ((unsigned long)(*((iv)++))) << 8L, v0 |= ((unsigned long)(*((iv)++))));
        ti[0] = v0;
        (v1 = ((unsigned long)(*((iv)++))) << 24L, v1 |= ((unsigned long)(*((iv)++))) << 16L, v1 |= ((unsigned long)(*((iv)++))) << 8L, v1 |= ((unsigned long)(*((iv)++))));
        ti[1] = v1;
        CAST_encrypt((CAST_LONG *)ti, schedule);
        iv = ivec;
        t = ti[0];
        (*((iv)++) = (unsigned char)(((t) >> 24L) & 0xff), *((iv)++) = (unsigned char)(((t) >> 16L) & 0xff), *((iv)++) = (unsigned char)(((t) >> 8L) & 0xff), *((iv)++) = (unsigned char)(((t)) & 0xff));
        t = ti[1];
        (*((iv)++) = (unsigned char)(((t) >> 24L) & 0xff), *((iv)++) = (unsigned char)(((t) >> 16L) & 0xff), *((iv)++) = (unsigned char)(((t) >> 8L) & 0xff), *((iv)++) = (unsigned char)(((t)) & 0xff));
        iv = ivec;
      }
      cc = *(in++);
      c = iv[n];
      iv[n] = cc;
      *(out++) = c ^ cc;
      n = (n + 1) & 0x07;
    }
  }
  v0 = v1 = ti[0] = ti[1] = t = c = cc = 0;
  *num = n;
}
```