user: 这段汇编代码用C语言表示是什么样的?

```asm
<schc_decompression>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x50,%rsp
  mov    %rdi,-0x38(%rbp)
  mov    %rsi,-0x40(%rbp)
  mov    %edx,-0x44(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  movl   $0x1,-0x30(%rbp)
  movl   $0x0,-0x2c(%rbp)
  movq   $0x80fe,-0x18(%rbp)
  movq   $0x2ff,-0x10(%rbp)
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  sar    $0x7,%al
  movsbl %al,%eax
  and    $0x1,%eax
  mov    %eax,-0x28(%rbp)
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  sar    $0x6,%al
  movsbl %al,%eax
  and    $0x1,%eax
  mov    %eax,-0x24(%rbp)
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  sar    $0x5,%al
  movsbl %al,%eax
  and    $0x1,%eax
  mov    %eax,-0x20(%rbp)
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  sar    $0x4,%al
  movsbl %al,%eax
  and    $0x1,%eax
  mov    %eax,-0x1c(%rbp)
  mov    -0x40(%rbp),%rax
  movb   $0x60,(%rax)
  mov    -0x40(%rbp),%rax
  add    $0x1,%rax
  movb   $0x0,(%rax)
  mov    -0x40(%rbp),%rax
  add    $0x2,%rax
  movb   $0x0,(%rax)
  mov    -0x40(%rbp),%rax
  add    $0x3,%rax
  movb   $0x0,(%rax)
  addl   $0x4,-0x2c(%rbp)
  addl   $0x2,-0x2c(%rbp)
  cmpl   $0x0,-0x28(%rbp)
  jne    L3
  mov    -0x2c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x40(%rbp),%rax
  add    %rdx,%rax
  movb   $0x3a,(%rax)
  addl   $0x1,-0x2c(%rbp)
L3:
  mov    -0x2c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x40(%rbp),%rax
  add    %rdx,%rax
  movb   $0xff,(%rax)
  addl   $0x1,-0x2c(%rbp)
  cmpl   $0x0,-0x24(%rbp)
  jne    L24
  mov    -0x2c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x40(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  lea    -0x18(%rbp),%rax
  mov    $0x8,%edx
  mov    %rax,%rsi
  mov    %rcx,%rdi
  call   <memcpy@plt>
  addl   $0x8,-0x2c(%rbp)
  mov    -0x30(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x38(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  mov    -0x2c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x40(%rbp),%rax
  add    %rdx,%rax
  mov    $0x8,%edx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <memcpy@plt>
  addl   $0x8,-0x2c(%rbp)
  addl   $0x8,-0x30(%rbp)
  jmp    L16
L24:
  mov    -0x30(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x38(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  mov    -0x2c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x40(%rbp),%rax
  add    %rdx,%rax
  mov    $0x10,%edx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <memcpy@plt>
  addl   $0x10,-0x2c(%rbp)
  addl   $0x10,-0x30(%rbp)
L16:
  cmpl   $0x0,-0x20(%rbp)
  jne    L87
  mov    -0x2c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x40(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  lea    -0x10(%rbp),%rax
  mov    $0x8,%edx
  mov    %rax,%rsi
  mov    %rcx,%rdi
  call   <memcpy@plt>
  addl   $0x8,-0x2c(%rbp)
  mov    -0x30(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x38(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  mov    -0x2c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x40(%rbp),%rax
  add    %rdx,%rax
  mov    $0x8,%edx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <memcpy@plt>
  addl   $0x8,-0x2c(%rbp)
  addl   $0x8,-0x30(%rbp)
  jmp    L25
L87:
  cmpl   $0x0,-0x1c(%rbp)
  jne    L42
  mov    -0x2c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x40(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  lea    -0x18(%rbp),%rax
  mov    $0x8,%edx
  mov    %rax,%rsi
  mov    %rcx,%rdi
  call   <memcpy@plt>
  addl   $0x8,-0x2c(%rbp)
  mov    -0x30(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x38(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  mov    -0x2c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x40(%rbp),%rax
  add    %rdx,%rax
  mov    $0x8,%edx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <memcpy@plt>
  addl   $0x8,-0x2c(%rbp)
  addl   $0x8,-0x30(%rbp)
  jmp    L25
L42:
  mov    -0x30(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x38(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  mov    -0x2c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x40(%rbp),%rax
  add    %rdx,%rax
  mov    $0x10,%edx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <memcpy@plt>
  addl   $0x10,-0x2c(%rbp)
  addl   $0x10,-0x30(%rbp)
L25:
  cmpl   $0x0,-0x28(%rbp)
  jne    L84
  mov    -0x44(%rbp),%edi
  mov    -0x2c(%rbp),%ecx
  mov    -0x30(%rbp),%edx
  mov    -0x40(%rbp),%rsi
  mov    -0x38(%rbp),%rax
  mov    %edi,%r8d
  mov    %rax,%rdi
  call   <icmp_decompression@plt>
L84:
  mov    -0x40(%rbp),%rax
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L57
  call   <__stack_chk_fail@plt>
L57:
  leave
  ret
```

assistant: ```c
char *schc_decompression(char *schc_buffer, char *buffer, int packet_size) {
  int schc_offset = 1;
  int buffer_offset = 0;
  char link_local_feight_bytes[8] = {0xfe, 0x80, 0, 0, 0, 0, 0, 0};
  char multicast_feight_bytes[8] = {0xff, 0x02, 0, 0, 0, 0, 0, 0};
  int schc_header = (schc_buffer[0] >> 7) & 1;
  int schc_src = (schc_buffer[0] >> 6) & 1;
  int multicast = (schc_buffer[0] >> 5) & 1;
  int schc_dst = (schc_buffer[0] >> 4) & 1;
  buffer[0] = 0x60;
  buffer[1] = 0;
  buffer[2] = 0;
  buffer[3] = 0;
  buffer_offset += 4;
  buffer_offset += 2;
  if (schc_header == 0) {
    buffer[buffer_offset] = 0x3a;
    buffer_offset += 1;
  }
  buffer[buffer_offset] = 255;
  buffer_offset += 1;
  if (schc_src == 0) {
    memcpy(&buffer[buffer_offset], &link_local_feight_bytes[0], 8);
    buffer_offset += 8;
    memcpy(&buffer[buffer_offset], &schc_buffer[schc_offset], 8);
    buffer_offset += 8;
    schc_offset += 8;
  } else {
    memcpy(&buffer[buffer_offset], &schc_buffer[schc_offset], 16);
    buffer_offset += 16;
    schc_offset += 16;
  }
  if (multicast == 0) {
    memcpy(&buffer[buffer_offset], &multicast_feight_bytes[0], 8);
    buffer_offset += 8;
    memcpy(&buffer[buffer_offset], &schc_buffer[schc_offset], 8);
    buffer_offset += 8;
    schc_offset += 8;
  } else {
    if (schc_dst == 0) {
      memcpy(&buffer[buffer_offset], &link_local_feight_bytes[0], 8);
      buffer_offset += 8;
      memcpy(&buffer[buffer_offset], &schc_buffer[schc_offset], 8);
      buffer_offset += 8;
      schc_offset += 8;
    } else {
      memcpy(&buffer[buffer_offset], &schc_buffer[schc_offset], 16);
      buffer_offset += 16;
      schc_offset += 16;
    }
  }
  if (schc_header == 0) {
    icmp_decompression(schc_buffer, buffer, schc_offset, buffer_offset, packet_size);
  }
  return buffer;
}
```