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/* -*- 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/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#ifndef INCLUDED_OOX_HELPER_HELPER_HXX
#define INCLUDED_OOX_HELPER_HELPER_HXX
#include <sal/config.h>
#include <algorithm>
#include <cstring>
#include <limits>
#include <osl/endian.h>
#include <rtl/math.hxx>
#include <rtl/string.hxx>
#include <rtl/textenc.h>
#include <sal/macros.h>
#include <sal/types.h>
namespace oox {
// Helper macros ==============================================================
/** Expands to the 'index'-th element of a STATIC data array, or to 'def', if
'index' is out of the array limits. */
#define STATIC_ARRAY_SELECT( array, index, def ) \
((static_cast<size_t>(index) < SAL_N_ELEMENTS(array)) ? ((array)[static_cast<size_t>(index)]) : (def))
/** Convert an OUString to an ASCII C string. Use for debug purposes only. */
#define OUSTRING_TO_CSTR( str ) \
OUStringToOString( str, RTL_TEXTENCODING_ASCII_US ).getStr()
// Common constants ===========================================================
const sal_uInt8 WINDOWS_CHARSET_ANSI = 0;
const sal_uInt8 WINDOWS_CHARSET_DEFAULT = 1;
const sal_uInt8 WINDOWS_CHARSET_SYMBOL = 2;
const sal_uInt8 WINDOWS_CHARSET_APPLE_ROMAN = 77;
const sal_uInt8 WINDOWS_CHARSET_SHIFTJIS = 128;
const sal_uInt8 WINDOWS_CHARSET_HANGEUL = 129;
const sal_uInt8 WINDOWS_CHARSET_JOHAB = 130;
const sal_uInt8 WINDOWS_CHARSET_GB2312 = 134;
const sal_uInt8 WINDOWS_CHARSET_BIG5 = 136;
const sal_uInt8 WINDOWS_CHARSET_GREEK = 161;
const sal_uInt8 WINDOWS_CHARSET_TURKISH = 162;
const sal_uInt8 WINDOWS_CHARSET_VIETNAMESE = 163;
const sal_uInt8 WINDOWS_CHARSET_HEBREW = 177;
const sal_uInt8 WINDOWS_CHARSET_ARABIC = 178;
const sal_uInt8 WINDOWS_CHARSET_BALTIC = 186;
const sal_uInt8 WINDOWS_CHARSET_RUSSIAN = 204;
const sal_uInt8 WINDOWS_CHARSET_THAI = 222;
const sal_uInt8 WINDOWS_CHARSET_EASTERN = 238;
const sal_uInt8 WINDOWS_CHARSET_OEM = 255;
const sal_Int32 API_RGB_TRANSPARENT = -1; ///< Transparent color for API calls.
const sal_uInt32 UNSIGNED_RGB_TRANSPARENT = static_cast<sal_uInt32>(-1); ///< Transparent color for unsigned int32 places.
const sal_Int32 API_RGB_BLACK = 0x000000; ///< Black color for API calls.
const sal_Int32 API_RGB_GRAY = 0x808080; ///< Gray color for API calls.
const sal_Int32 API_RGB_WHITE = 0xFFFFFF; ///< White color for API calls.
const sal_Int16 API_LINE_SOLID = 0;
const sal_Int16 API_LINE_DOTTED = 1;
const sal_Int16 API_LINE_DASHED = 2;
const sal_Int16 API_FINE_LINE_DASHED = 14;
const sal_Int16 API_LINE_NONE = 0;
const sal_Int16 API_LINE_HAIR = 2;
const sal_Int16 API_LINE_THIN = 35;
const sal_Int16 API_LINE_MEDIUM = 88;
const sal_Int16 API_LINE_THICK = 141;
const sal_Int16 API_ESCAPE_NONE = 0; ///< No escapement.
const sal_Int16 API_ESCAPE_SUPERSCRIPT = 101; ///< Superscript: raise characters automatically (magic value 101).
const sal_Int16 API_ESCAPE_SUBSCRIPT = -101; ///< Subscript: lower characters automatically (magic value -101).
const sal_Int8 API_ESCAPEHEIGHT_NONE = 100; ///< Relative character height if not escaped.
const sal_Int8 API_ESCAPEHEIGHT_DEFAULT = 58; ///< Relative character height if escaped.
// Limitate values ------------------------------------------------------------
template< typename ReturnType, typename Type >
inline ReturnType getLimitedValue( Type nValue, Type nMin, Type nMax )
{
return static_cast< ReturnType >( ::std::min( ::std::max( nValue, nMin ), nMax ) );
}
template< typename ReturnType, typename Type >
inline ReturnType getIntervalValue( Type nValue, Type nBegin, Type nEnd )
{
static_assert(::std::numeric_limits< Type >::is_integer, "is integer");
Type nInterval = nEnd - nBegin;
Type nCount = (nValue < nBegin) ? -((nBegin - nValue - 1) / nInterval + 1) : ((nValue - nBegin) / nInterval);
return static_cast< ReturnType >( nValue - nCount * nInterval );
}
template< typename ReturnType >
inline ReturnType getDoubleIntervalValue( double fValue, double fBegin, double fEnd )
{
double fInterval = fEnd - fBegin;
double fCount = (fValue < fBegin) ? -(::rtl::math::approxFloor( (fBegin - fValue - 1.0) / fInterval ) + 1.0) : ::rtl::math::approxFloor( (fValue - fBegin) / fInterval );
return static_cast< ReturnType >( fValue - fCount * fInterval );
}
// Read from bitfields --------------------------------------------------------
/** Returns true, if at least one of the bits set in nMask is set in nBitField. */
template< typename Type >
inline bool getFlag( Type nBitField, Type nMask )
{
return (nBitField & nMask) != 0;
}
/** Returns nSet, if at least one bit of nMask is set in nBitField, otherwise nUnset. */
template< typename ReturnType, typename Type >
inline ReturnType getFlagValue( Type nBitField, Type nMask, ReturnType nSet, ReturnType nUnset )
{
return getFlag( nBitField, nMask ) ? nSet : nUnset;
}
/** Extracts a value from a bit field.
Returns the data fragment from nBitField, that starts at bit nStartBit
(0-based, bit 0 is rightmost) with the width of nBitCount. The returned
value will be right-aligned (normalized).
For instance: extractValue<T>(0x4321,8,4) returns 3 (value in bits 8-11).
*/
template< typename ReturnType, typename Type >
inline ReturnType extractValue( Type nBitField, sal_uInt8 nStartBit, sal_uInt8 nBitCount )
{
sal_uInt64 nMask = 1; nMask <<= nBitCount; --nMask;
return static_cast< ReturnType >( nMask & (nBitField >> nStartBit) );
}
// Write to bitfields ---------------------------------------------------------
/** Sets or clears (according to bSet) all set bits of nMask in ornBitField. */
template< typename Type >
inline void setFlag( Type& ornBitField, Type nMask, bool bSet = true )
{
if( bSet ) ornBitField |= nMask; else ornBitField &= ~nMask;
}
/** Optional value, similar to ::boost::optional<>, with convenience accessors.
*/
template< typename Type >
class OptValue
{
public:
OptValue() : maValue(), mbHasValue( false ) {}
explicit OptValue( const Type& rValue ) : maValue( rValue ), mbHasValue( true ) {}
explicit OptValue( bool bHasValue, const Type& rValue ) : maValue( rValue ), mbHasValue( bHasValue ) {}
bool has() const { return mbHasValue; }
bool operator!() const { return !mbHasValue; }
bool differsFrom( const Type& rValue ) const { return mbHasValue && (maValue != rValue); }
const Type& get() const { return maValue; }
const Type& get( const Type& rDefValue ) const { return mbHasValue ? maValue : rDefValue; }
void set( const Type& rValue ) { maValue = rValue; mbHasValue = true; }
Type& use() { mbHasValue = true; return maValue; }
OptValue& operator=( const Type& rValue ) { set( rValue ); return *this; }
bool operator==( const OptValue& rValue ) const {
return ( ( !mbHasValue && rValue.mbHasValue == false ) ||
( mbHasValue == rValue.mbHasValue && maValue == rValue.maValue ) );
}
void assignIfUsed( const OptValue& rValue ) { if( rValue.mbHasValue ) set( rValue.maValue ); }
private:
Type maValue;
bool mbHasValue;
};
/** Provides platform independent functions to convert from or to little-endian
byte order, e.g. for reading data from or writing data to memory or a
binary stream.
On big-endian platforms, the byte order in the passed values is swapped,
this can be used for converting big-endian to and from little-endian data.
On little-endian platforms, the conversion functions are implemented empty,
thus compilers should completely optimize away the function call.
*/
class ByteOrderConverter
{
public:
#ifdef OSL_BIGENDIAN
static void convertLittleEndian( sal_Int8& ) {} // present for usage in templates
static void convertLittleEndian( sal_uInt8& ) {} // present for usage in templates
#if !defined SAL_W32 // cf. sal/types.h sal_Unicode
static void convertLittleEndian( char16_t& rnValue ) { swap2( reinterpret_cast< sal_uInt8* >( &rnValue ) ); }
#endif
static void convertLittleEndian( sal_Int16& rnValue ) { swap2( reinterpret_cast< sal_uInt8* >( &rnValue ) ); }
static void convertLittleEndian( sal_uInt16& rnValue ) { swap2( reinterpret_cast< sal_uInt8* >( &rnValue ) ); }
static void convertLittleEndian( sal_Int32& rnValue ) { swap4( reinterpret_cast< sal_uInt8* >( &rnValue ) ); }
static void convertLittleEndian( sal_uInt32& rnValue ) { swap4( reinterpret_cast< sal_uInt8* >( &rnValue ) ); }
static void convertLittleEndian( sal_Int64& rnValue ) { swap8( reinterpret_cast< sal_uInt8* >( &rnValue ) ); }
static void convertLittleEndian( sal_uInt64& rnValue ) { swap8( reinterpret_cast< sal_uInt8* >( &rnValue ) ); }
static void convertLittleEndian( float& rfValue ) { swap4( reinterpret_cast< sal_uInt8* >( &rfValue ) ); }
static void convertLittleEndian( double& rfValue ) { swap8( reinterpret_cast< sal_uInt8* >( &rfValue ) ); }
template< typename Type >
inline static void convertLittleEndianArray( Type* pnArray, size_t nElemCount );
static void convertLittleEndianArray( sal_Int8*, size_t ) {}
static void convertLittleEndianArray( sal_uInt8*, size_t ) {}
#else
template< typename Type >
static void convertLittleEndian( Type& ) {}
template< typename Type >
static void convertLittleEndianArray( Type*, size_t ) {}
#endif
/** Writes a value to memory, while converting it to little-endian.
@param pDstBuffer The memory buffer to write the value to.
@param nValue The value to be written to memory in little-endian.
*/
template< typename Type >
inline static void writeLittleEndian( void* pDstBuffer, Type nValue );
#ifdef OSL_BIGENDIAN
private:
inline static void swap2( sal_uInt8* pnData );
inline static void swap4( sal_uInt8* pnData );
inline static void swap8( sal_uInt8* pnData );
#endif
};
template< typename Type >
inline void ByteOrderConverter::writeLittleEndian( void* pDstBuffer, Type nValue )
{
convertLittleEndian( nValue );
memcpy( pDstBuffer, &nValue, sizeof( Type ) );
}
#ifdef OSL_BIGENDIAN
template< typename Type >
inline void ByteOrderConverter::convertLittleEndianArray( Type* pnArray, size_t nElemCount )
{
for( Type* pnArrayEnd = pnArray + nElemCount; pnArray != pnArrayEnd; ++pnArray )
convertLittleEndian( *pnArray );
}
inline void ByteOrderConverter::swap2( sal_uInt8* pnData )
{
::std::swap( pnData[ 0 ], pnData[ 1 ] );
}
inline void ByteOrderConverter::swap4( sal_uInt8* pnData )
{
::std::swap( pnData[ 0 ], pnData[ 3 ] );
::std::swap( pnData[ 1 ], pnData[ 2 ] );
}
inline void ByteOrderConverter::swap8( sal_uInt8* pnData )
{
::std::swap( pnData[ 0 ], pnData[ 7 ] );
::std::swap( pnData[ 1 ], pnData[ 6 ] );
::std::swap( pnData[ 2 ], pnData[ 5 ] );
::std::swap( pnData[ 3 ], pnData[ 4 ] );
}
#endif
} // namespace oox
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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