/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2021 Justine Alexandra Roberts Tunney                              │
│                                                                              │
│ Permission to use, copy, modify, and/or distribute this software for         │
│ any purpose with or without fee is hereby granted, provided that the         │
│ above copyright notice and this permission notice appear in all copies.      │
│                                                                              │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
│ PERFORMANCE OF THIS SOFTWARE.                                                │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/alg/reverse.internal.h"
#include "libc/calls/calls.h"
#include "libc/nt/process.h"

static const char kPipeNamePrefix[] = "\\\\?\\pipe\\cosmo\\";

static textwindows size_t UintToChar16Array(char16_t *a, uint64_t i) {
  size_t j = 0;
  do {
    a[j++] = i % 10 + '0';
    i /= 10;
  } while (i > 0);
  a[j] = 0;
  reverse(a, j);
  return j;
}

textwindows char16_t *CreatePipeName(char16_t *a) {
  static long x;
  unsigned i;
  for (i = 0; kPipeNamePrefix[i]; ++i) a[i] = kPipeNamePrefix[i];
  i += UintToChar16Array(a + i, GetCurrentProcessId());
  a[i++] = u'-';
  i += UintToChar16Array(a + i, GetCurrentProcessId());
  a[i++] = u'-';
  i += UintToChar16Array(a + i, x++);
  a[i] = u'\0';
  return a;
}