/*-*- 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 2020 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/calls/internal.h"
#include "libc/calls/state.internal.h"
#include "libc/calls/struct/fd.internal.h"
#include "libc/calls/struct/winsize.h"
#include "libc/calls/struct/winsize.internal.h"
#include "libc/calls/syscall_support-nt.internal.h"
#include "libc/errno.h"
#include "libc/macros.internal.h"
#include "libc/nt/console.h"
#include "libc/nt/enum/startf.h"
#include "libc/nt/startupinfo.h"
#include "libc/nt/struct/consolescreenbufferinfoex.h"
#include "libc/nt/struct/startupinfo.h"
#include "libc/str/str.h"
#include "libc/sysv/errfuns.h"

textwindows int tcgetwinsize_nt(struct Fd *fd, struct winsize *ws) {
  int i, e, rc;
  uint32_t mode;
  struct Fd *fds[3];
  struct NtStartupInfo startinfo;
  struct NtConsoleScreenBufferInfoEx sbinfo;
  rc = -1;
  e = errno;
  if (ws) {
    __fds_lock();
    fds[0] = fd, fds[1] = g_fds.p + 1, fds[2] = g_fds.p + 0;
    GetStartupInfo(&startinfo);
    for (i = 0; i < ARRAYLEN(fds); ++i) {
      if (fds[i]->kind == kFdFile || fds[i]->kind == kFdConsole) {
        if (GetConsoleMode(__getfdhandleactual(i), &mode)) {
          bzero(&sbinfo, sizeof(sbinfo));
          sbinfo.cbSize = sizeof(sbinfo);
          if (GetConsoleScreenBufferInfoEx(__getfdhandleactual(i), &sbinfo)) {
            ws->ws_col = sbinfo.srWindow.Right - sbinfo.srWindow.Left + 1;
            ws->ws_row = sbinfo.srWindow.Bottom - sbinfo.srWindow.Top + 1;
            ws->ws_xpixel = 0;
            ws->ws_ypixel = 0;
            errno = e;
            rc = 0;
            break;
          } else if (startinfo.dwFlags & kNtStartfUsecountchars) {
            ws->ws_col = startinfo.dwXCountChars;
            ws->ws_row = startinfo.dwYCountChars;
            ws->ws_xpixel = 0;
            ws->ws_ypixel = 0;
            errno = e;
            rc = 0;
            break;
          } else {
            __winerr();
          }
        } else {
          enotty();
        }
      } else {
        ebadf();
      }
    }
    __fds_unlock();
  } else {
    efault();
  }
  return rc;
}