/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ /* * This file is part of the LibreOffice project. * * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ #ifndef INCLUDED_TOOLS_HELPERS_HXX #define INCLUDED_TOOLS_HELPERS_HXX #include #include #include #include #include template inline typename std::enable_if< std::is_signed::value || std::is_floating_point::value, long >::type MinMax(T nVal, long nMin, long nMax) { assert(nMin <= nMax); if (nVal >= nMin) { if (nVal <= nMax) return static_cast(nVal); else return nMax; } else { return nMin; } } template inline typename std::enable_if< std::is_unsigned::value, long >::type MinMax(T nVal, long nMin, long nMax) { assert(nMin <= nMax); if (nMax < 0) { return nMax; } else { if (nMin < 0 || nVal >= static_cast(nMin)) { if (nVal <= static_cast(nMax)) return static_cast(nVal); else return nMax; } else { return nMin; } } } inline sal_uInt32 AlignedWidth4Bytes(sal_uInt32 nWidthBits) { if (nWidthBits > SAL_MAX_UINT32 - 31) nWidthBits = SAL_MAX_UINT32; else nWidthBits += 31; return (nWidthBits >> 5) << 2; } inline long FRound( double fVal ) { return fVal > 0.0 ? static_cast( fVal + 0.5 ) : -static_cast( -fVal + 0.5 ); } //valid range: (-180,180] template [[nodiscard]] inline typename std::enable_if::value, T>::type NormAngle180(T angle) { while (angle <= -180) angle += 360; while (angle > 180) angle -= 360; return angle; } //valid range: [0,360) template [[nodiscard]] inline T NormAngle360(T angle) { while (angle < 0) angle += 360; while (angle >= 360) angle -= 360; return angle; } /** Convert 100th-mm to twips A twip is 1/20 of a point, one inch is equal to 72 points, and one inch is 2,540 100th-mm. Thus: twips = n * 72 / 2,540 / 20 = n * 72 / 127 Adding 63 (half of 127) fixes truncation issues in int arithmetic. This formula is (n>=0) ? (n*72+63) / 127 : (n*72-63) / 127 */ inline sal_Int64 sanitiseMm100ToTwip(sal_Int64 n) { if (n >= 0) { if (o3tl::checked_multiply(n, 72, n) || o3tl::checked_add(n, 63, n)) n = SAL_MAX_INT64; } else { if (o3tl::checked_multiply(n, 72, n) || o3tl::checked_sub(n, 63, n)) n = SAL_MIN_INT64; } return n / 127; // 127 is 2,540 100th-mm divided by 20pts } #endif /* vim:set shiftwidth=4 softtabstop=4 expandtab: */ on> LibreOffice 核心代码仓库文档基金会

path: root/binaryurp/source/bridgefactory.hxx

Age	Commit message (Expand)	Author
2019-01-14	Use C++17 nested namespace definitions (in binaryurp)	Stephan Bergmann