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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 : * This file incorporates work covered by the following license notice:
10 : *
11 : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : * contributor license agreements. See the NOTICE file distributed
13 : * with this work for additional information regarding copyright
14 : * ownership. The ASF licenses this file to you under the Apache
15 : * License, Version 2.0 (the "License"); you may not use this file
16 : * except in compliance with the License. You may obtain a copy of
17 : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : */
19 :
20 : #ifndef INCLUDED_OOX_HELPER_HELPER_HXX
21 : #define INCLUDED_OOX_HELPER_HELPER_HXX
22 :
23 : #include <algorithm>
24 : #include <limits>
25 : #include <boost/static_assert.hpp>
26 : #include <osl/endian.h>
27 : #include <rtl/math.hxx>
28 : #include <rtl/string.hxx>
29 : #include <rtl/ustring.hxx>
30 : #include <string.h>
31 :
32 : namespace oox {
33 :
34 : // Helper macros ==============================================================
35 :
36 : /** Expands to the number of elements in a STATIC data array. */
37 : #define STATIC_ARRAY_SIZE( array ) \
38 : (sizeof(array)/sizeof(*(array)))
39 :
40 : /** Expands to a pointer behind the last element of a STATIC data array (like
41 : STL end()). */
42 : #define STATIC_ARRAY_END( array ) \
43 : ((array)+STATIC_ARRAY_SIZE(array))
44 :
45 : /** Expands to the 'index'-th element of a STATIC data array, or to 'def', if
46 : 'index' is out of the array limits. */
47 : #define STATIC_ARRAY_SELECT( array, index, def ) \
48 : ((static_cast<size_t>(index) < STATIC_ARRAY_SIZE(array)) ? ((array)[static_cast<size_t>(index)]) : (def))
49 :
50 : /** Expands to a temporary OString, created from a literal(!) character
51 : array. */
52 : #define CREATE_OSTRING( ascii ) \
53 : OString( RTL_CONSTASCII_STRINGPARAM( ascii ) )
54 :
55 : /** Convert an OUString to an ASCII C string. Use for debug purposes only. */
56 : #define OUSTRING_TO_CSTR( str ) \
57 : OUStringToOString( str, RTL_TEXTENCODING_ASCII_US ).getStr()
58 :
59 : // Common constants ===========================================================
60 :
61 : const sal_uInt8 WINDOWS_CHARSET_ANSI = 0;
62 : const sal_uInt8 WINDOWS_CHARSET_DEFAULT = 1;
63 : const sal_uInt8 WINDOWS_CHARSET_SYMBOL = 2;
64 : const sal_uInt8 WINDOWS_CHARSET_APPLE_ROMAN = 77;
65 : const sal_uInt8 WINDOWS_CHARSET_SHIFTJIS = 128;
66 : const sal_uInt8 WINDOWS_CHARSET_HANGEUL = 129;
67 : const sal_uInt8 WINDOWS_CHARSET_JOHAB = 130;
68 : const sal_uInt8 WINDOWS_CHARSET_GB2312 = 134;
69 : const sal_uInt8 WINDOWS_CHARSET_BIG5 = 136;
70 : const sal_uInt8 WINDOWS_CHARSET_GREEK = 161;
71 : const sal_uInt8 WINDOWS_CHARSET_TURKISH = 162;
72 : const sal_uInt8 WINDOWS_CHARSET_VIETNAMESE = 163;
73 : const sal_uInt8 WINDOWS_CHARSET_HEBREW = 177;
74 : const sal_uInt8 WINDOWS_CHARSET_ARABIC = 178;
75 : const sal_uInt8 WINDOWS_CHARSET_BALTIC = 186;
76 : const sal_uInt8 WINDOWS_CHARSET_RUSSIAN = 204;
77 : const sal_uInt8 WINDOWS_CHARSET_THAI = 222;
78 : const sal_uInt8 WINDOWS_CHARSET_EASTERN = 238;
79 : const sal_uInt8 WINDOWS_CHARSET_OEM = 255;
80 :
81 :
82 :
83 : const sal_Int32 API_RGB_TRANSPARENT = -1; ///< Transparent color for API calls.
84 : const sal_Int32 API_RGB_BLACK = 0x000000; ///< Black color for API calls.
85 : const sal_Int32 API_RGB_GRAY = 0x808080; ///< Gray color for API calls.
86 : const sal_Int32 API_RGB_WHITE = 0xFFFFFF; ///< White color for API calls.
87 :
88 : const sal_Int16 API_LINE_SOLID = 0;
89 : const sal_Int16 API_LINE_DOTTED = 1;
90 : const sal_Int16 API_LINE_DASHED = 2;
91 : const sal_Int16 API_FINE_LINE_DASHED = 14;
92 :
93 : const sal_Int16 API_LINE_NONE = 0;
94 : const sal_Int16 API_LINE_HAIR = 2;
95 : const sal_Int16 API_LINE_THIN = 35;
96 : const sal_Int16 API_LINE_MEDIUM = 88;
97 : const sal_Int16 API_LINE_THICK = 141;
98 :
99 : const sal_Int16 API_ESCAPE_NONE = 0; ///< No escapement.
100 : const sal_Int16 API_ESCAPE_SUPERSCRIPT = 101; ///< Superscript: raise characters automatically (magic value 101).
101 : const sal_Int16 API_ESCAPE_SUBSCRIPT = -101; ///< Subscript: lower characters automatically (magic value -101).
102 :
103 : const sal_Int8 API_ESCAPEHEIGHT_NONE = 100; ///< Relative character height if not escaped.
104 : const sal_Int8 API_ESCAPEHEIGHT_DEFAULT = 58; ///< Relative character height if escaped.
105 :
106 :
107 :
108 : // Limitate values ------------------------------------------------------------
109 :
110 : template< typename ReturnType, typename Type >
111 0 : inline ReturnType getLimitedValue( Type nValue, Type nMin, Type nMax )
112 : {
113 0 : return static_cast< ReturnType >( ::std::min( ::std::max( nValue, nMin ), nMax ) );
114 : }
115 :
116 : template< typename ReturnType, typename Type >
117 0 : inline ReturnType getIntervalValue( Type nValue, Type nBegin, Type nEnd )
118 : {
119 : // this BOOST_STATIC_ASSERT fails with suncc
120 : // BOOST_STATIC_ASSERT( ::std::numeric_limits< Type >::is_integer );
121 0 : Type nInterval = nEnd - nBegin;
122 0 : Type nCount = (nValue < nBegin) ? -((nBegin - nValue - 1) / nInterval + 1) : ((nValue - nBegin) / nInterval);
123 0 : return static_cast< ReturnType >( nValue - nCount * nInterval );
124 : }
125 :
126 : template< typename ReturnType >
127 0 : inline ReturnType getDoubleIntervalValue( double fValue, double fBegin, double fEnd )
128 : {
129 0 : double fInterval = fEnd - fBegin;
130 0 : double fCount = (fValue < fBegin) ? -(::rtl::math::approxFloor( (fBegin - fValue - 1.0) / fInterval ) + 1.0) : ::rtl::math::approxFloor( (fValue - fBegin) / fInterval );
131 0 : return static_cast< ReturnType >( fValue - fCount * fInterval );
132 : }
133 :
134 : // Read from bitfields --------------------------------------------------------
135 :
136 : /** Returns true, if at least one of the bits set in nMask is set in nBitField. */
137 : template< typename Type >
138 0 : inline bool getFlag( Type nBitField, Type nMask )
139 : {
140 0 : return (nBitField & nMask) != 0;
141 : }
142 :
143 : /** Returns nSet, if at least one bit of nMask is set in nBitField, otherwise nUnset. */
144 : template< typename ReturnType, typename Type >
145 0 : inline ReturnType getFlagValue( Type nBitField, Type nMask, ReturnType nSet, ReturnType nUnset )
146 : {
147 0 : return getFlag( nBitField, nMask ) ? nSet : nUnset;
148 : }
149 :
150 : /** Extracts a value from a bit field.
151 :
152 : Returns the data fragment from nBitField, that starts at bit nStartBit
153 : (0-based, bit 0 is rightmost) with the width of nBitCount. The returned
154 : value will be right-aligned (normalized).
155 : For instance: extractValue<T>(0x4321,8,4) returns 3 (value in bits 8-11).
156 : */
157 : template< typename ReturnType, typename Type >
158 0 : inline ReturnType extractValue( Type nBitField, sal_uInt8 nStartBit, sal_uInt8 nBitCount )
159 : {
160 0 : sal_uInt64 nMask = 1; nMask <<= nBitCount; --nMask;
161 0 : return static_cast< ReturnType >( nMask & (nBitField >> nStartBit) );
162 : }
163 :
164 : // Write to bitfields ---------------------------------------------------------
165 :
166 : /** Sets or clears (according to bSet) all set bits of nMask in ornBitField. */
167 : template< typename Type >
168 0 : inline void setFlag( Type& ornBitField, Type nMask, bool bSet = true )
169 : {
170 0 : if( bSet ) ornBitField |= nMask; else ornBitField &= ~nMask;
171 0 : }
172 :
173 : /** Inserts a value into a bitfield.
174 :
175 : Inserts the lower nBitCount bits of nValue into ornBitField, starting
176 : there at bit nStartBit. Other contents of ornBitField keep unchanged.
177 : */
178 : template< typename Type, typename InsertType >
179 : void insertValue( Type& ornBitField, InsertType nValue, sal_uInt8 nStartBit, sal_uInt8 nBitCount )
180 : {
181 : sal_uInt64 nMask = 1; nMask <<= nBitCount; --nMask;
182 : Type nNewValue = static_cast< Type >( nValue & nMask );
183 : (ornBitField &= ~(nMask << nStartBit)) |= (nNewValue << nStartBit);
184 : }
185 :
186 :
187 :
188 : /** Optional value, similar to ::boost::optional<>, with convenience accessors.
189 : */
190 : template< typename Type >
191 0 : class OptValue
192 : {
193 : public:
194 0 : OptValue() : maValue(), mbHasValue( false ) {}
195 0 : explicit OptValue( const Type& rValue ) : maValue( rValue ), mbHasValue( true ) {}
196 0 : explicit OptValue( bool bHasValue, const Type& rValue ) : maValue( rValue ), mbHasValue( bHasValue ) {}
197 :
198 0 : bool has() const { return mbHasValue; }
199 0 : bool operator!() const { return !mbHasValue; }
200 0 : bool differsFrom( const Type& rValue ) const { return mbHasValue && (maValue != rValue); }
201 :
202 0 : const Type& get() const { return maValue; }
203 0 : const Type& get( const Type& rDefValue ) const { return mbHasValue ? maValue : rDefValue; }
204 :
205 : void reset() { mbHasValue = false; }
206 0 : void set( const Type& rValue ) { maValue = rValue; mbHasValue = true; }
207 0 : Type& use() { mbHasValue = true; return maValue; }
208 :
209 0 : OptValue& operator=( const Type& rValue ) { set( rValue ); return *this; }
210 0 : bool operator==( const OptValue& rValue ) const {
211 : return ( ( mbHasValue == false && rValue.mbHasValue == false ) ||
212 0 : ( mbHasValue == rValue.mbHasValue && maValue == rValue.maValue ) );
213 : }
214 0 : void assignIfUsed( const OptValue& rValue ) { if( rValue.mbHasValue ) set( rValue.maValue ); }
215 :
216 : private:
217 : Type maValue;
218 : bool mbHasValue;
219 : };
220 :
221 :
222 :
223 : /** Provides platform independent functions to convert from or to little-endian
224 : byte order, e.g. for reading data from or writing data to memory or a
225 : binary stream.
226 :
227 : On big-endian platforms, the byte order in the passed values is swapped,
228 : this can be used for converting big-endian to and from little-endian data.
229 :
230 : On little-endian platforms, the conversion functions are implemented empty,
231 : thus compilers should completely optimize away the function call.
232 : */
233 : class ByteOrderConverter
234 : {
235 : public:
236 : #ifdef OSL_BIGENDIAN
237 : static void convertLittleEndian( sal_Int8& ) {} // present for usage in templates
238 : static void convertLittleEndian( sal_uInt8& ) {} // present for usage in templates
239 : static void convertLittleEndian( sal_Int16& rnValue ) { swap2( reinterpret_cast< sal_uInt8* >( &rnValue ) ); }
240 : static void convertLittleEndian( sal_uInt16& rnValue ) { swap2( reinterpret_cast< sal_uInt8* >( &rnValue ) ); }
241 : static void convertLittleEndian( sal_Int32& rnValue ) { swap4( reinterpret_cast< sal_uInt8* >( &rnValue ) ); }
242 : static void convertLittleEndian( sal_uInt32& rnValue ) { swap4( reinterpret_cast< sal_uInt8* >( &rnValue ) ); }
243 : static void convertLittleEndian( sal_Int64& rnValue ) { swap8( reinterpret_cast< sal_uInt8* >( &rnValue ) ); }
244 : static void convertLittleEndian( sal_uInt64& rnValue ) { swap8( reinterpret_cast< sal_uInt8* >( &rnValue ) ); }
245 : static void convertLittleEndian( float& rfValue ) { swap4( reinterpret_cast< sal_uInt8* >( &rfValue ) ); }
246 : static void convertLittleEndian( double& rfValue ) { swap8( reinterpret_cast< sal_uInt8* >( &rfValue ) ); }
247 :
248 : template< typename Type >
249 : inline static void convertLittleEndianArray( Type* pnArray, size_t nElemCount );
250 :
251 : static void convertLittleEndianArray( sal_Int8*, size_t ) {}
252 : static void convertLittleEndianArray( sal_uInt8*, size_t ) {}
253 :
254 : #else
255 : template< typename Type >
256 0 : static void convertLittleEndian( Type& ) {}
257 :
258 : template< typename Type >
259 0 : static void convertLittleEndianArray( Type*, size_t ) {}
260 :
261 : #endif
262 :
263 : /** Reads a value from memory, assuming memory buffer in little-endian.
264 : @param ornValue (out-parameter) Contains the value read from memory.
265 : @param pSrcBuffer The memory buffer to read the value from.
266 : */
267 : template< typename Type >
268 : inline static void readLittleEndian( Type& ornValue, const void* pSrcBuffer );
269 :
270 : /** Writes a value to memory, while converting it to little-endian.
271 : @param pDstBuffer The memory buffer to write the value to.
272 : @param nValue The value to be written to memory in little-endian.
273 : */
274 : template< typename Type >
275 : inline static void writeLittleEndian( void* pDstBuffer, Type nValue );
276 :
277 : #ifdef OSL_BIGENDIAN
278 : private:
279 : inline static void swap2( sal_uInt8* pnData );
280 : inline static void swap4( sal_uInt8* pnData );
281 : inline static void swap8( sal_uInt8* pnData );
282 : #endif
283 : };
284 :
285 :
286 :
287 : template< typename Type >
288 : inline void ByteOrderConverter::readLittleEndian( Type& ornValue, const void* pSrcBuffer )
289 : {
290 : memcpy( &ornValue, pSrcBuffer, sizeof( Type ) );
291 : convertLittleEndian( ornValue );
292 : }
293 :
294 : template< typename Type >
295 0 : inline void ByteOrderConverter::writeLittleEndian( void* pDstBuffer, Type nValue )
296 : {
297 0 : convertLittleEndian( nValue );
298 0 : memcpy( pDstBuffer, &nValue, sizeof( Type ) );
299 0 : }
300 :
301 : #ifdef OSL_BIGENDIAN
302 : template< typename Type >
303 : inline void ByteOrderConverter::convertLittleEndianArray( Type* pnArray, size_t nElemCount )
304 : {
305 : for( Type* pnArrayEnd = pnArray + nElemCount; pnArray != pnArrayEnd; ++pnArray )
306 : convertLittleEndian( *pnArray );
307 : }
308 :
309 : inline void ByteOrderConverter::swap2( sal_uInt8* pnData )
310 : {
311 : ::std::swap( pnData[ 0 ], pnData[ 1 ] );
312 : }
313 :
314 : inline void ByteOrderConverter::swap4( sal_uInt8* pnData )
315 : {
316 : ::std::swap( pnData[ 0 ], pnData[ 3 ] );
317 : ::std::swap( pnData[ 1 ], pnData[ 2 ] );
318 : }
319 :
320 : inline void ByteOrderConverter::swap8( sal_uInt8* pnData )
321 : {
322 : ::std::swap( pnData[ 0 ], pnData[ 7 ] );
323 : ::std::swap( pnData[ 1 ], pnData[ 6 ] );
324 : ::std::swap( pnData[ 2 ], pnData[ 5 ] );
325 : ::std::swap( pnData[ 3 ], pnData[ 4 ] );
326 : }
327 : #endif
328 :
329 :
330 :
331 : } // namespace oox
332 :
333 : #endif
334 :
335 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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