user: Converte this assembly snippet into its equivalent C code:

```asm
<relative_filename>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  mov    %rdi,%r12
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  cmpb   $0x0,0x1(%rsi)
  je     L80
  movzbl (%rsi),%edx
  mov    %rsi,%rbp
  xor    %eax,%eax
  test   %dl,%dl
  jne    L115
  mov    %rdi,%rdx
  xor    %ebx,%ebx
  jmp    L139
  nopl   (%rax)
L130:
  lea    0x1(%rax),%ebx
  add    $0x1,%rax
  movzbl 0x0(%rbp,%rax,1),%edx
  test   %dl,%dl
  je     L9
L115:
  mov    %eax,%ebx
  cmp    (%r12,%rax,1),%dl
  je     L130
L111:
  mov    %ebx,%esi
  mov    %rbp,%rdi
  call   <path_component@plt>
  test   %eax,%eax
  jne    L38
L78:
  test   %ebx,%ebx
  je     L72
  movslq %ebx,%rax
  jmp    L105
  nopl   0x0(%rax,%rax,1)
L66:
  sub    $0x1,%rax
  mov    %eax,%ebx
  test   %eax,%eax
  je     L72
L105:
  cmpb   $0x2f,-0x1(%r12,%rax,1)
  mov    %eax,%ebx
  jne    L66
L49:
  lea    0x1(%rbx),%edx
  movslq %edx,%rax
L0:
  movzbl 0x0(%rbp,%rax,1),%eax
  test   %al,%al
  je     L48
  movslq %edx,%rdx
  mov    $0x1,%r13d
  lea    0x1(%rbp,%rdx,1),%rdx
  nopl   0x0(%rax)
L20:
  cmp    $0x2f,%al
  sete   %al
  add    $0x1,%rdx
  movzbl %al,%eax
  add    %eax,%r13d
  movzbl -0x1(%rdx),%eax
  test   %al,%al
  jne    L20
  cmp    $0x2,%r13d
  jg     L62
  movslq %ebx,%rbx
  lea    0x0(%r13,%r13,2),%r15d
  lea    (%r12,%rbx,1),%rbp
  movslq %r15d,%r14
  mov    %rbp,%rdi
  call   <strlen@plt>
  lea    0x1(%rax,%r15,1),%edi
  mov    %eax,%ebx
  lea    D10(%rip),%r15
  call   <xmalloc@plt>
  mov    $0x3,%edx
  mov    %r15,%rsi
  mov    %rax,%rdi
  mov    %rax,%r12
  call   <memcpy@plt>
  cmp    $0x2,%r13d
  jne    L59
  lea    0x3(%r12),%rdi
  mov    $0x3,%edx
  mov    %r15,%rsi
  call   <memcpy@plt>
L59:
  lea    (%r12,%r14,1),%rdi
  lea    0x1(%rbx),%edx
  mov    %rbp,%rsi
  call   <memcpy@plt>
  add    $0x8,%rsp
  mov    %r12,%rax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nop
L80:
  cmpb   $0x0,0x1(%r12)
  lea    0x1(%rdi),%rdi
  jne    L155
L62:
  mov    %r12,%rdi
L155:
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  jmp    10c0 <xstrdup@plt>
  nopw   0x0(%rax,%rax,1)
L9:
  lea    (%r12,%rax,1),%rdx
L139:
  cmpb   $0x2f,(%rdx)
  jne    L111
  lea    0x1(%r12,%rax,1),%rdi
  jmp    L155
  nopl   0x0(%rax)
L72:
  mov    $0x1,%eax
  mov    $0x1,%edx
  jmp    L0
  nop
L38:
  mov    %ebx,%esi
  mov    %r12,%rdi
  call   <path_component@plt>
  test   %eax,%eax
  je     L78
  jmp    L49
  nopw   0x0(%rax,%rax,1)
L48:
  movslq %ebx,%rbx
  mov    $0x3,%r14d
  lea    (%r12,%rbx,1),%rbp
  mov    %rbp,%rdi
  call   <strlen@plt>
  lea    0x4(%rax),%edi
  mov    %eax,%ebx
  call   <xmalloc@plt>
  mov    $0x3,%edx
  lea    D10(%rip),%rsi
  mov    %rax,%rdi
  mov    %rax,%r12
  call   <memcpy@plt>
  jmp    L59
```

tool_calls: name: read_data
arguments: data_label: D10
data_type: string

tool: D10: ../

assistant: ```c
char *relative_filename(const char *f, const char *cwd) {
  int i, tlen, dotdot, len, clen = 0;
  char *filename;
  if (cwd[1] == 0) {
    if (f[1] == 0)
      return xstrdup(f);
    return xstrdup(f + 1);
  }
  while (cwd[clen] && cwd[clen] == f[clen])
    clen++;
  if (!cwd[clen] && f[clen] == '/') {
    return xstrdup(f + clen + 1);
  }
  if (!path_component(cwd, clen) || !path_component(f, clen)) {
    while (clen > 0 && f[clen - 1] != '/')
      clen--;
  }
  dotdot = 1;
  for (i = clen + 1; cwd[i]; i++) {
    if (cwd[i] == '/')
      dotdot++;
  }
  if (dotdot > 2)
    return xstrdup(f);
  tlen = strlen(f + clen);
  len = dotdot * 3 + tlen;
  filename = (char *)xmalloc(sizeof(char) * (len + 1));
  for (i = 0; i < dotdot; i++)
    memcpy(filename + i * 3, "../", 3);
  memcpy(filename + dotdot * 3, f + clen, tlen + 1);
  return filename;
}
```