include/tools/helpers.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  */
   9 #pragma once
  10
  11 #include <sal/config.h>
  12 #include <sal/types.h>
  13 #include <tools/long.hxx>
  14 #include <cassert>
  15 #include <limits>
  16 #include <type_traits>
  17
  18 inline sal_uInt32 AlignedWidth4Bytes(sal_uInt32 nWidthBits)
  19 {
  20     if (nWidthBits > SAL_MAX_UINT32 - 31)
  21         nWidthBits = SAL_MAX_UINT32;
  22     else
  23         nWidthBits += 31;
  24     return (nWidthBits >> 5) << 2;
  25 }
  26
  27 inline tools::Long FRound( double fVal )
  28 {
  29     return fVal > 0.0
  30         ? fVal == double(std::numeric_limits<tools::Long>::max())
  31             ? std::numeric_limits<tools::Long>::max() : static_cast<tools::Long>( fVal + 0.5 )
  32         :  static_cast<tools::Long>( fVal - 0.5 );
  33 }
  34
  35 //valid range:  (-180,180]
  36 template <typename T>
  37 [[nodiscard]] inline typename std::enable_if<std::is_signed<T>::value, T>::type
  38 NormAngle180(T angle)
  39 {
  40     while (angle <= -180)
  41         angle += 360;
  42     while (angle > 180)
  43         angle -= 360;
  44     return angle;
  45 }
  46
  47 //valid range:  [0,360)
  48 template <typename T> [[nodiscard]] inline T NormAngle360(T angle)
  49 {
  50     while (angle < 0)
  51         angle += 360;
  52     while (angle >= 360)
  53         angle -= 360;
  54     return angle;
  55 }
  56
  57 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */