user: 提供的汇编代码用C语言表示会是什么样子:

```asm
<sega_lz77>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x38,%rsp
  mov    %rdx,%r13
  mov    %fs:0x28,%rax
  mov    %rax,0x28(%rsp)
  xor    %eax,%eax
  lea    0x70(%rsp),%rax
  mov    %rax,0x18(%rsp)
  mov    %rdi,(%rsp)
  mov    %esi,0xc(%rsp)
  movl   $0x0,0x10(%rsp)
  movl   $0x1,0x8(%rsp)
  mov    $0x0,%r12d
  mov    %rsp,%rbp
  test   %esi,%esi
  jg     L41
  jmp    L70
L53:
  mov    %rbp,%r10
  call   <GetBit_00E1F5D0.0>
  test   %al,%al
  je     L5
  mov    %rbp,%r10
  call   <GetByte_00E1F580.1>
  mov    %eax,%r14d
  movzbl %al,%r15d
  mov    %rbp,%r10
  call   <GetByte_00E1F580.1>
  movzbl %al,%edx
  or     %r14b,%al
  je     L70
  shl    $0x5,%edx
  shr    $0x3,%r15d
  lea    -0x2000(%rdx,%r15,1),%r15d
  and    $0x7,%r14d
  je     L90
  add    $0x2,%r14d
  jmp    L69
L90:
  mov    %rbp,%r10
  call   <GetByte_00E1F580.1>
  movzbl %al,%r14d
  add    $0xa,%r14d
  jmp    L69
L5:
  mov    %rbp,%r10
  call   <GetBit_00E1F5D0.0>
  movzbl %al,%r14d
  add    %r14d,%r14d
  mov    %rbp,%r10
  call   <GetBit_00E1F5D0.0>
  movzbl %al,%eax
  lea    0x2(%r14,%rax,1),%r14d
  mov    %rbp,%r10
  call   <GetByte_00E1F580.1>
  movzbl %al,%r15d
  sub    $0x100,%r15d
L69:
  mov    0xc(%rsp),%eax
  cmp    %eax,0x10(%rsp)
  jge    L26
L41:
  movslq %r12d,%rbx
L56:
  mov    %ebx,%r12d
  mov    %rbp,%r10
  call   <GetBit_00E1F5D0.0>
  test   %al,%al
  je     L53
  mov    %rbp,%r10
  call   <GetByte_00E1F580.1>
  mov    %al,0x0(%r13,%rbx,1)
  add    $0x1,%rbx
  jmp    L56
L26:
  movslq %r12d,%r12
  lea    0x0(%r13,%r12,1),%rdx
  lea    0x1(%r13,%r12,1),%rcx
  lea    -0x1(%r14),%eax
  add    %rax,%rcx
  mov    %rdx,%rax
  mov    %ebx,%r12d
  add    %ebx,%r15d
  sub    %edx,%r15d
L57:
  lea    (%r15,%rax,1),%edx
  movzbl 0x0(%r13,%rdx,1),%edx
  mov    %dl,(%rax)
  add    $0x1,%rax
  cmp    %rcx,%rax
  jne    L57
  add    %r14d,%r12d
L70:
  mov    0x28(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L92
  mov    %r12d,%eax
  add    $0x38,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L92:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
int sega_lz77(unsigned char *Buf, int File_Size, unsigned char *Buf2) {
  int SrcPos;
  unsigned char CurByte;
  int BitCounter;
  unsigned char GetByte_00E1F580(void) {
    unsigned char RESULT;
    if (SrcPos >= File_Size)
      return (0);
    RESULT = Buf[SrcPos];
    SrcPos++;
    return (RESULT);
  }
  unsigned char GetBit_00E1F5D0(void) {
    unsigned char RESULT;
    BitCounter--;
    if (!BitCounter) {
      CurByte = GetByte_00E1F580();
      BitCounter = 8;
    }
    RESULT = CurByte & 1;
    CurByte >>= 1;
    return (RESULT);
  }
  unsigned int _EBP_m_4 = 0, _EBP_m_8 = 0;
  int DstPos;
  unsigned char _EAX;
  SrcPos = 0;
  DstPos = 0;
  BitCounter = 1;
  while (SrcPos < File_Size) {
    for (;;) {
      _EAX = GetBit_00E1F5D0();
      if (!_EAX)
        break;
      Buf2[DstPos++] = GetByte_00E1F580();
    }
    if (GetBit_00E1F5D0()) {
      _EBP_m_4 = GetByte_00E1F580();
      _EBP_m_8 = GetByte_00E1F580();
      _EAX = _EBP_m_8 | _EBP_m_4;
      if (!_EAX)
        break;
      _EBP_m_8 = (_EBP_m_8 << 5) + (_EBP_m_4 >> 3) - 0x2000;
      _EBP_m_4 &= 7;
      if (_EBP_m_4) {
        _EBP_m_4 += 2;
      } else {
        _EBP_m_4 = GetByte_00E1F580() + 0x0A;
      }
    } else {
      _EBP_m_4 = GetBit_00E1F5D0() * 2;
      _EBP_m_4 += GetBit_00E1F5D0() + 2;
      _EBP_m_8 = GetByte_00E1F580() - 0x100;
    }
  }
  while (_EBP_m_4 > 0) {
    Buf2[DstPos] = Buf2[DstPos + _EBP_m_8];
    DstPos++;
    _EBP_m_4--;
  }
  return (DstPos);
}
```