user: 请显示与下面列出的汇编代码相匹配的C语言实现：

```asm
<_fixpath>:
  endbr64
  push   %r14
  push   %r13
  push   %r12
  mov    %rsi,%r12
  push   %rbp
  push   %rbx
  cmpb   $0x3a,0x1(%rdi)
  mov    %rdi,%rbx
  jne    L37
  movzbl (%rdi),%edx
  mov    %edx,%eax
  and    $0xffffffdf,%eax
  sub    $0x41,%eax
  cmp    $0x19,%al
  jbe    L168
L37:
  xor    %eax,%eax
  lea    0x2(%r12),%r13
  call   <_get_default_drive@plt>
  mov    %r13,%rbp
  mov    %eax,%r14d
  lea    0x61(%rax),%eax
  mov    %al,(%r12)
  mov    $0x3a,%eax
L176:
  mov    %al,0x1(%r12)
  movsbl (%rbx),%edi
  call   <is_slash@plt>
  test   %rax,%rax
  je     L72
  nop
L114:
  movsbl (%rbx),%edi
  test   %dil,%dil
  je     L28
L172:
  call   <is_slash@plt>
  test   %rax,%rax
  jne    L76
  cmpb   $0x2e,(%rbx)
  je     L182
L166:
  movb   $0x2f,0x0(%rbp)
  add    $0x1,%rbp
  nop
L149:
  movsbl (%rbx),%edi
  call   <is_term@plt>
  test   %rax,%rax
  jne    L114
  mov    %rbp,%rdi
  mov    %rbx,%rsi
  movsb  %ds:(%rsi),%es:(%rdi)
  mov    %rsi,%rbx
  mov    %rdi,%rbp
  jmp    L149
  nopl   0x0(%rax)
L76:
  movsbl 0x1(%rbx),%edi
  add    $0x1,%rbx
  test   %dil,%dil
  jne    L172
L28:
  cmp    %r13,%rbp
  je     L33
  movb   $0x0,0x0(%rbp)
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  ret
  nopl   0x0(%rax,%rax,1)
L182:
  movsbl 0x1(%rbx),%edi
  call   <is_term@plt>
  test   %rax,%rax
  jne    L76
  cmpb   $0x2e,(%rbx)
  jne    L166
  cmpb   $0x2e,0x1(%rbx)
  jne    L166
  movsbl 0x2(%rbx),%edi
  call   <is_term@plt>
  test   %rax,%rax
  je     L166
  add    $0x2,%rbx
  cmp    %r13,%rbp
  jbe    L114
  nopl   0x0(%rax)
L90:
  movsbl -0x1(%rbp),%edi
  sub    $0x1,%rbp
  call   <is_slash@plt>
  test   %rax,%rax
  je     L90
  jmp    L114
L168:
  lea    -0x61(%rdx),%eax
  movsbl %dl,%r14d
  lea    0x2(%rsi),%r13
  mov    %dl,(%rsi)
  movsbl %al,%ecx
  sub    $0x41,%r14d
  cmp    $0x19,%al
  mov    %r13,%rbp
  cmovbe %ecx,%r14d
  movzbl 0x1(%rdi),%eax
  add    $0x2,%rbx
  jmp    L176
L72:
  mov    %r14d,%esi
  mov    %r13,%rdi
  call   <get_current_directory@plt>
  mov    %rax,%rbp
  jmp    L114
L33:
  lea    0x3(%r12),%rbp
  movb   $0x2f,0x2(%r12)
  movb   $0x0,0x0(%rbp)
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  ret
```

assistant: ```c
void _fixpath(const char *in, char *out) {
  int drive_number;
  const char *ip = in;
  char *op = out;
  if (*(ip + 1) == ':' && ((*ip >= 'a' && *ip <= 'z') || (*ip >= 'A' && *ip <= 'Z'))) {
    if (*ip >= 'a' && *ip <= 'z')
      drive_number = *ip - 'a';
    else
      drive_number = *ip - 'A';
    *op++ = *ip++;
    *op++ = *ip++;
  } else {
    drive_number = _get_default_drive();
    *op++ = drive_number + 'a';
    *op++ = ':';
  }
  if (!is_slash(*ip))
    op = get_current_directory(op, drive_number);
  while (*ip) {
    if (is_slash(*ip)) {
      ip++;
      continue;
    }
    if (*ip == '.' && is_term(*(ip + 1))) {
      ip++;
      continue;
    }
    if (*ip == '.' && *(ip + 1) == '.' && is_term(*(ip + 2))) {
      ip += 2;
      if (op > out + 2)
        while (!is_slash(*--op))
          ;
      continue;
    }
    *op++ = '/';
    while (!is_term(*ip))
      *op++ = *ip++;
  }
  if (op == out + 2)
    *op++ = '/';
  *op = '\0';
}
```