LCOV - code coverage report
Current view: top level - usr/local/src/libreoffice/include/rtl - byteseq.h (source / functions) Hit Total Coverage
Test: libreoffice_filtered.info Lines: 10 12 83.3 %
Date: 2013-07-09 Functions: 5 6 83.3 %
Legend: Lines: hit not hit

          Line data    Source code
       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             : #ifndef _RTL_BYTESEQ_H_
      20             : #define _RTL_BYTESEQ_H_
      21             : 
      22             : #include "sal/config.h"
      23             : 
      24             : #include "rtl/alloc.h"
      25             : #include "rtl/ustring.h"
      26             : #include "sal/saldllapi.h"
      27             : #include "sal/types.h"
      28             : 
      29             : #ifdef __cplusplus
      30             : extern "C"
      31             : {
      32             : #endif
      33             : 
      34             : /** Assures that the reference count of the given byte sequence is one. Otherwise a new copy
      35             :     of the sequence is created with a reference count of one.
      36             : 
      37             :     @param ppSequence sequence
      38             : */
      39             : SAL_DLLPUBLIC void SAL_CALL rtl_byte_sequence_reference2One(
      40             :     sal_Sequence ** ppSequence )
      41             :     SAL_THROW_EXTERN_C();
      42             : 
      43             : /** Reallocates length of byte sequence.
      44             : 
      45             :     @param ppSequence sequence
      46             :     @param nSize new size of sequence
      47             : */
      48             : SAL_DLLPUBLIC void SAL_CALL rtl_byte_sequence_realloc(
      49             :     sal_Sequence ** ppSequence, sal_Int32 nSize )
      50             :     SAL_THROW_EXTERN_C();
      51             : 
      52             : /** Acquires the byte sequence
      53             : 
      54             :     @param pSequence sequence, that is to be acquired
      55             : */
      56             : SAL_DLLPUBLIC void SAL_CALL rtl_byte_sequence_acquire(
      57             :     sal_Sequence *pSequence )
      58             :     SAL_THROW_EXTERN_C();
      59             : 
      60             : /** Releases the byte sequence. If the refcount drops to zero, the sequence is freed.
      61             : 
      62             :     @param pSequence sequence, that is to be released; invalid after call
      63             : */
      64             : SAL_DLLPUBLIC void SAL_CALL rtl_byte_sequence_release(
      65             :     sal_Sequence *pSequence )
      66             :     SAL_THROW_EXTERN_C();
      67             : 
      68             : /** Constructs a bytes sequence with length nLength. All bytes are set to zero.
      69             : 
      70             :     @param ppSequence inout sequence; on entry *ppSequence may be null, otherwise it is released;
      71             :                       after the call, *ppSequence contains the newly constructed sequence
      72             :     @param nLength    length of new sequence
      73             : */
      74             : SAL_DLLPUBLIC void SAL_CALL rtl_byte_sequence_construct(
      75             :     sal_Sequence **ppSequence , sal_Int32 nLength )
      76             :     SAL_THROW_EXTERN_C();
      77             : 
      78             : /** Constructs a bytes sequence with length nLength. The data is not initialized.
      79             : 
      80             :     @param ppSequence inout sequence; on entry *ppSequence may be null, otherwise it is released;
      81             :                       after the call, *ppSequence contains the newly constructed sequence
      82             :     @param nLength    length of new sequence
      83             : */
      84             : SAL_DLLPUBLIC void SAL_CALL rtl_byte_sequence_constructNoDefault(
      85             :     sal_Sequence **ppSequence , sal_Int32 nLength )
      86             :     SAL_THROW_EXTERN_C();
      87             : 
      88             : /** Constructs a byte sequence with length nLength and copies nLength bytes from pData.
      89             : 
      90             :     @param ppSequence inout sequence; on entry *ppSequence may be null, otherwise it is released;
      91             :                       after the call, *ppSequence contains the newly constructed sequence
      92             :     @param pData      initial data
      93             :     @param nLength    length of new sequence
      94             : */
      95             : SAL_DLLPUBLIC void SAL_CALL rtl_byte_sequence_constructFromArray(
      96             :     sal_Sequence **ppSequence, const sal_Int8 *pData , sal_Int32 nLength )
      97             :     SAL_THROW_EXTERN_C();
      98             : 
      99             : /** Assigns the byte sequence pSequence to *ppSequence.
     100             : 
     101             :     @param ppSequence inout sequence; on entry *ppSequence may be null, otherwise it is released;
     102             :                       after the call, *ppSequence references pSequence
     103             :     @param pSequence  the source sequence
     104             : */
     105             : SAL_DLLPUBLIC void SAL_CALL rtl_byte_sequence_assign(
     106             :     sal_Sequence **ppSequence , sal_Sequence *pSequence )
     107             :     SAL_THROW_EXTERN_C();
     108             : 
     109             : /** Compares two byte sequences.
     110             : 
     111             :     @return true, if the data within the sequences are identical; false otherwise
     112             : */
     113             : SAL_DLLPUBLIC sal_Bool SAL_CALL rtl_byte_sequence_equals(
     114             :     sal_Sequence *pSequence1 , sal_Sequence *pSequence2 )
     115             :     SAL_THROW_EXTERN_C();
     116             : 
     117             : /** Returns the data array pointer of the sequence.
     118             : 
     119             :     @return read-pointer to the data array of the sequence. If rtl_byte_sequence_reference2One()
     120             :             has been called before, the pointer may be casted to a non const pointer and
     121             :             the sequence may be modified
     122             : */
     123             : SAL_DLLPUBLIC const sal_Int8 *SAL_CALL rtl_byte_sequence_getConstArray(
     124             :     sal_Sequence *pSequence )
     125             :     SAL_THROW_EXTERN_C();
     126             : 
     127             : /** Returns the length of the sequence
     128             : 
     129             :     @param pSequence sequence handle
     130             :     @return length of the sequence
     131             : */
     132             : SAL_DLLPUBLIC sal_Int32 SAL_CALL rtl_byte_sequence_getLength(
     133             :     sal_Sequence *pSequence )
     134             :     SAL_THROW_EXTERN_C();
     135             : 
     136             : #ifdef __cplusplus
     137             : }
     138             : namespace rtl
     139             : {
     140             : 
     141             : enum __ByteSequence_NoDefault
     142             : {
     143             :     /** This enum value can be used to create a bytesequence with uninitalized data
     144             :     */
     145             :     BYTESEQ_NODEFAULT = 0xcafe
     146             : };
     147             : 
     148             : enum __ByteSequence_NoAcquire
     149             : {
     150             :     /** This enum value can be used to create a bytesequence from a C-Handle without
     151             :         acquiring the handle.
     152             :     */
     153             :     BYTESEQ_NOACQUIRE = 0xcafebabe
     154             : };
     155             : 
     156             : /** C++ class representing a SAL byte sequence.
     157             :     C++ Sequences are reference counted and shared, so the sequence keeps a handle to its data.
     158             :     To keep value semantics, copies are only generated if the sequence is to be modified
     159             :     (new handle).
     160             : */
     161             : class SAL_WARN_UNUSED ByteSequence
     162             : {
     163             :     /** sequence handle
     164             :     */
     165             :     sal_Sequence * _pSequence;
     166             : 
     167             : public:
     168             :     /// @cond INTERNAL
     169             :     // these are here to force memory de/allocation to sal lib.
     170             :     inline static void * SAL_CALL operator new ( size_t nSize ) SAL_THROW(())
     171             :         { return ::rtl_allocateMemory( nSize ); }
     172             :     inline static void SAL_CALL operator delete ( void * pMem ) SAL_THROW(())
     173             :         { ::rtl_freeMemory( pMem ); }
     174           0 :     inline static void * SAL_CALL operator new ( size_t, void * pMem ) SAL_THROW(())
     175           0 :         { return pMem; }
     176             :     inline static void SAL_CALL operator delete ( void *, void * ) SAL_THROW(())
     177             :         {}
     178             :     /// @endcond
     179             : 
     180             :     /** Default constructor: Creates an empty sequence.
     181             :     */
     182             :     inline ByteSequence() SAL_THROW(());
     183             :     /** Copy constructor: Creates a copy of given sequence.
     184             : 
     185             :         @param rSeq another byte sequence
     186             :     */
     187             :     inline ByteSequence( const ByteSequence & rSeq ) SAL_THROW(());
     188             :     /** Copy constructor Creates a copy from the C-Handle.
     189             : 
     190             :         @param pSequence another byte sequence handle
     191             :     */
     192             :     inline ByteSequence( sal_Sequence *pSequence ) SAL_THROW(());
     193             :     /** Constructor: Creates a copy of given data bytes.
     194             : 
     195             :         @param pElements an array of bytes
     196             :         @param len number of bytes
     197             :     */
     198             :     inline ByteSequence( const sal_Int8 * pElements, sal_Int32 len );
     199             :     /** Constructor: Creates sequence of given length and initializes all bytes to 0.
     200             : 
     201             :         @param len initial sequence length
     202             :     */
     203             :     inline ByteSequence( sal_Int32 len );
     204             :     /** Constructor: Creates sequence of given length and does NOT initialize data.
     205             :                      Use this ctor for performance optimization only.
     206             : 
     207             :         @param len initial sequence length
     208             :         @param nodefault dummy parameter forcing explicit BYTESEQ_NODEFAULT
     209             :     */
     210             :     inline ByteSequence( sal_Int32 len , enum __ByteSequence_NoDefault nodefault );
     211             :     /** Constructor:
     212             :         Creates a sequence from a C-Handle without acquiring the handle, thus taking
     213             :         over owenership. Eitherway the handle is release by the destructor.
     214             :         This ctor is useful, when working with a c-interface (it safes a pair of
     215             :         acquire and release call and is thus a performance optimization only).
     216             : 
     217             :         @param pSequence sequence handle to be taken over
     218             :         @param noacquire dummy parameter forcing explicit BYTESEQ_NOACQUIRE
     219             :     */
     220             :     inline ByteSequence( sal_Sequence *pSequence , enum __ByteSequence_NoAcquire noacquire ) SAL_THROW(());
     221             :     /** Destructor: Releases sequence handle. Last handle will free memory.
     222             :     */
     223             :     inline ~ByteSequence() SAL_THROW(());
     224             : 
     225             :     /** Assignment operator: Acquires given sequence handle and releases a previously set handle.
     226             : 
     227             :         @param rSeq another byte sequence
     228             :         @return this sequence
     229             :     */
     230             :     inline ByteSequence & SAL_CALL operator = ( const ByteSequence & rSeq ) SAL_THROW(());
     231             : 
     232             :     /** Gets the length of sequence.
     233             : 
     234             :         @return length of sequence
     235             :     */
     236     1275771 :     inline sal_Int32 SAL_CALL getLength() const SAL_THROW(())
     237     1275771 :         { return _pSequence->nElements; }
     238             : 
     239             :     /** Gets a pointer to byte array for READING. If the sequence has a length of 0, then the
     240             :         returned pointer is undefined.
     241             : 
     242             :         @return pointer to byte array
     243             :     */
     244     8001854 :     inline const sal_Int8 * SAL_CALL getConstArray() const SAL_THROW(())
     245     8001854 :         { return (const sal_Int8 *)_pSequence->elements; }
     246             :     /** Gets a pointer to elements array for READING AND WRITING. In general if the sequence
     247             :         has a handle acquired by other sequences (reference count > 1), then a new sequence is
     248             :         created copying all bytes to keep value semantics!
     249             :         If the sequence has a length of 0, then the returned pointer is undefined.
     250             : 
     251             :         @return pointer to elements array
     252             :     */
     253             :     inline sal_Int8 * SAL_CALL getArray();
     254             : 
     255             :     /** Non-const index operator:
     256             :         Obtains a reference to byte indexed at given position.
     257             :         In general if the sequence has a handle acquired by other
     258             :         sequences (reference count > 1), then a new sequence is created
     259             :         copying all bytes to keep value semantics!
     260             : 
     261             :         @attention
     262             :         The implementation does NOT check for array bounds!
     263             : 
     264             :         @param nIndex index
     265             :         @return non-const C++ reference to element at index nIndex
     266             :     */
     267             :     inline sal_Int8 & SAL_CALL operator [] ( sal_Int32 nIndex );
     268             : 
     269             :     /** Const index operator: Obtains a reference to byte indexed at given position.
     270             :                               The implementation does NOT check for array bounds!
     271             : 
     272             :         @param nIndex index
     273             :         @return const C++ reference to byte at element of indenx nIndex
     274             :     */
     275     7216624 :     inline const sal_Int8 & SAL_CALL operator [] ( sal_Int32 nIndex ) const SAL_THROW(())
     276     7216624 :         { return getConstArray()[ nIndex ]; }
     277             : 
     278             :     /** Equality operator: Compares two sequences.
     279             : 
     280             :         @param rSeq another byte sequence (right side)
     281             :         @return true if both sequences are equal, false otherwise
     282             :     */
     283             :     inline sal_Bool SAL_CALL operator == ( const ByteSequence & rSeq ) const SAL_THROW(());
     284             :     /** Unequality operator: Compares two sequences.
     285             : 
     286             :         @param rSeq another byte sequence (right side)
     287             :         @return false if both sequences are equal, true otherwise
     288             :     */
     289             :     inline sal_Bool SAL_CALL operator != ( const ByteSequence & rSeq ) const SAL_THROW(());
     290             : 
     291             :     /** Reallocates sequence to new length. If the sequence has a handle acquired by other sequences
     292             :         (reference count > 1), then the remaining elements are copied to a new sequence handle to
     293             :         keep value semantics!
     294             : 
     295             :         @param nSize new size of sequence
     296             :     */
     297             :     inline void SAL_CALL realloc( sal_Int32 nSize );
     298             : 
     299             :     /** Returns the UNnacquired C handle of the sequence
     300             : 
     301             :         @return UNacquired handle of the sequence
     302             :     */
     303      380006 :     inline sal_Sequence * SAL_CALL getHandle() const SAL_THROW(())
     304      380006 :         { return _pSequence; }
     305             :     /** Returns the UNnacquired C handle of the sequence (for compatibility reasons)
     306             : 
     307             :         @return UNacquired handle of the sequence
     308             :     */
     309         105 :     inline sal_Sequence * SAL_CALL get() const SAL_THROW(())
     310         105 :         { return _pSequence; }
     311             : };
     312             : 
     313             : }
     314             : #endif
     315             : #endif
     316             : 
     317             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

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