user: 请将这段汇编代码片段转换成等效的C代码：

```asm
<myrealpath>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %rbx
  sub    $0x58,%rsp
  mov    %rdi,-0x48(%rbp)
  mov    %rsi,-0x50(%rbp)
  mov    %edx,-0x54(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x18(%rbp)
  xor    %eax,%eax
  mov    %rsp,%rax
  mov    %rax,%rbx
  mov    D60(%rip),%rax
  mov    (%rax),%eax
  add    $0x1,%eax
  movslq %eax,%rdx
  sub    $0x1,%rdx
  mov    %rdx,-0x30(%rbp)
  movslq %eax,%rdx
  mov    %rdx,%r10
  mov    $0x0,%r11d
  movslq %eax,%rdx
  mov    %rdx,%r8
  mov    $0x0,%r9d
  cltq
  mov    $0x10,%edx
  sub    $0x1,%rdx
  add    %rdx,%rax
  mov    $0x10,%esi
  mov    $0x0,%edx
  div    %rsi
  imul   $0x10,%rax,%rax
  mov    %rax,%rcx
  and    $0xfffffffffffff000,%rcx
  mov    %rsp,%rdx
  sub    %rcx,%rdx
L113:
  cmp    %rdx,%rsp
  je     L57
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  jmp    L113
L57:
  mov    %rax,%rdx
  and    $0xfff,%edx
  sub    %rdx,%rsp
  mov    %rax,%rdx
  and    $0xfff,%edx
  test   %rdx,%rdx
  je     L159
  and    $0xfff,%eax
  sub    $0x8,%rax
  add    %rsp,%rax
  orq    $0x0,(%rax)
L159:
  mov    %rsp,%rax
  add    $0x0,%rax
  mov    %rax,-0x28(%rbp)
  cmpl   $0x0,-0x54(%rbp)
  jns    L17
  mov    D17(%rip),%rax
  mov    (%rax),%edx
  mov    D54(%rip),%rax
  mov    %edx,(%rax)
  mov    $0x0,%eax
  jmp    L106
L17:
  mov    -0x48(%rbp),%rax
  mov    %rax,%rdi
  call   <chdir@plt>
  test   %eax,%eax
  jne    L144
  mov    D60(%rip),%rax
  mov    (%rax),%edx
  mov    -0x50(%rbp),%rax
  mov    %edx,%esi
  mov    %rax,%rdi
  call   <getcwd@plt>
  jmp    L106
L144:
  mov    -0x48(%rbp),%rax
  mov    $0x2f,%esi
  mov    %rax,%rdi
  call   <strrchr@plt>
  mov    %rax,-0x20(%rbp)
  cmpq   $0x0,-0x20(%rbp)
  je     L136
  mov    -0x20(%rbp),%rax
  sub    -0x48(%rbp),%rax
  mov    %rax,%rdx
  mov    D60(%rip),%rax
  mov    (%rax),%eax
  cltq
  cmp    %rax,%rdx
  jle    L195
  mov    $0x0,%eax
  jmp    L106
L195:
  mov    -0x20(%rbp),%rax
  sub    -0x48(%rbp),%rax
  mov    %eax,%edx
  mov    -0x48(%rbp),%rcx
  mov    -0x28(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <memcpy@plt>
  mov    -0x20(%rbp),%rax
  sub    -0x48(%rbp),%rax
  mov    -0x28(%rbp),%rdx
  movb   $0x0,(%rdx,%rax,1)
  mov    -0x28(%rbp),%rax
  mov    %rax,%rdi
  call   <chdir@plt>
  cmp    $0xffffffff,%eax
  jne    L161
  mov    $0x0,%eax
  jmp    L106
L161:
  mov    -0x20(%rbp),%rax
  add    $0x1,%rax
  mov    %rax,-0x48(%rbp)
L136:
  mov    D60(%rip),%rax
  mov    (%rax),%edx
  mov    -0x28(%rbp),%rcx
  mov    -0x48(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <readlink@plt>
  test   %rax,%rax
  jne    L95
  mov    -0x54(%rbp),%eax
  lea    -0x1(%rax),%edx
  mov    -0x50(%rbp),%rcx
  mov    -0x28(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <myrealpath>
  jmp    L106
L95:
  mov    D60(%rip),%rax
  mov    (%rax),%edx
  mov    -0x50(%rbp),%rax
  mov    %edx,%esi
  mov    %rax,%rdi
  call   <getcwd@plt>
  test   %rax,%rax
  jne    L80
  mov    $0x0,%eax
  jmp    L106
L80:
  mov    -0x50(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  mov    %eax,-0x34(%rbp)
  mov    -0x34(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x50(%rbp),%rax
  add    %rdx,%rax
  movb   $0x2f,(%rax)
  addl   $0x1,-0x34(%rbp)
  jmp    L192
L208:
  mov    -0x34(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x50(%rbp),%rax
  add    %rdx,%rax
  mov    -0x48(%rbp),%rdx
  movzbl (%rdx),%edx
  mov    %dl,(%rax)
  movzbl (%rax),%eax
  test   %al,%al
  je     L107
  addq   $0x1,-0x48(%rbp)
  addl   $0x1,-0x34(%rbp)
L192:
  mov    D60(%rip),%rax
  mov    (%rax),%eax
  sub    $0x1,%eax
  cmp    %eax,-0x34(%rbp)
  jl     L208
  jmp    L61
L107:
  nop
L61:
  mov    -0x34(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x50(%rbp),%rax
  add    %rdx,%rax
  movb   $0x0,(%rax)
  mov    -0x50(%rbp),%rax
L106:
  mov    %rbx,%rsp
  mov    -0x18(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L172
  call   <__stack_chk_fail@plt>
L172:
  mov    -0x8(%rbp),%rbx
  leave
  ret
```

assistant: ```c
char *myrealpath(const char *file, char *dest, int count) {
  char buf[PATH_MAX + 1];
  char *c;
  int i;
  if (count < 0) {
    errno = EMLINK;
    return 0;
  }
  if (chdir(file) == 0)
    return getcwd(dest, PATH_MAX);
  c = strrchr(file, '/');
  if (c) {
    if (c - file > PATH_MAX)
      return 0;
    memcpy(buf, file, c - file);
    buf[c - file] = 0;
    if (chdir(buf) == -1)
      return 0;
    file = c + 1;
  }
  if (readlink(file, buf, PATH_MAX) == 0)
    return myrealpath(buf, dest, count - 1);
  if (getcwd(dest, PATH_MAX) == 0)
    return 0;
  i = strlen(dest);
  dest[i] = '/';
  ++i;
  for (; i < PATH_MAX - 1; ++i) {
    if (!(dest[i] = *file))
      break;
    ++file;
  }
  dest[i] = 0;
  return dest;
}
```