sal/rtl/strbuf.cxx

   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 #include <string.h>
  21
  22 #include <osl/interlck.h>
  23 #include <rtl/strbuf.hxx>
  24
  25 /*************************************************************************
  26  *  rtl_stringbuffer_newFromStr_WithLength
  27  */
  28 void SAL_CALL rtl_stringbuffer_newFromStr_WithLength( rtl_String ** newStr,
  29                                                       const sal_Char * value,
  30                                                       sal_Int32 count )
  31 {
  32     assert(newStr);
  33     assert(count >= 0);
  34     if (!value)
  35     {
  36         rtl_string_new_WithLength( newStr, 16 );
  37         return;
  38     }
  39
  40     rtl_string_new_WithLength( newStr, count + 16 );
  41     (*newStr)->length = count;
  42     memcpy( (*newStr)->buffer, value, count );
  43     return;
  44 }
  45
  46 /*************************************************************************
  47  *  rtl_stringbuffer_newFromStringBuffer
  48  */
  49 sal_Int32 SAL_CALL rtl_stringbuffer_newFromStringBuffer( rtl_String ** newStr,
  50                                                          sal_Int32 capacity,
  51                                                          rtl_String * oldStr )
  52 {
  53     assert(newStr);
  54     assert(oldStr);
  55     assert(capacity >= 0);
  56     sal_Int32 newCapacity = capacity;
  57
  58     if (newCapacity < oldStr->length)
  59         newCapacity = oldStr->length;
  60
  61     rtl_string_new_WithLength( newStr, newCapacity );
  62     if (oldStr->length > 0) {
  63         (*newStr)->length = oldStr->length;
  64         memcpy( (*newStr)->buffer, oldStr->buffer, oldStr->length );
  65     }
  66     return newCapacity;
  67 }
  68
  69 /*************************************************************************
  70  *  rtl_stringbuffer_ensureCapacity
  71  */
  72 void SAL_CALL rtl_stringbuffer_ensureCapacity
  73     (rtl_String ** This, sal_Int32* capacity, sal_Int32 minimumCapacity)
  74 {
  75     assert(This);
  76 //    assert(capacity && *capacity >= 0);
  77 //    assert(minimumCapacity >= 0);
  78     if (minimumCapacity > *capacity)
  79     {
  80         rtl_String * pTmp = *This;
  81         rtl_String * pNew = NULL;
  82         *capacity = ((*This)->length + 1) * 2;
  83         if (minimumCapacity > *capacity)
  84             /* still lower, set to the minimum capacity */
  85             *capacity = minimumCapacity;
  86
  87         rtl_string_new_WithLength(&pNew, *capacity);
  88         pNew->length = (*This)->length;
  89         *This = pNew;
  90
  91         memcpy( (*This)->buffer, pTmp->buffer, pTmp->length );
  92         rtl_string_release( pTmp );
  93     }
  94 }
  95
  96 /*************************************************************************
  97  *  rtl_stringbuffer_insert
  98  */
  99 void SAL_CALL rtl_stringbuffer_insert( rtl_String ** This,
 100                                        sal_Int32 * capacity,
 101                                        sal_Int32 offset,
 102                                        const sal_Char * str,
 103                                        sal_Int32 len )
 104 {
 105     assert(This);
 106     assert(capacity && *capacity >= 0);
 107     assert(offset >= 0 && offset <= (**This).length);
 108     assert(len >= 0);
 109     sal_Int32 nOldLen;
 110     sal_Char * pBuf;
 111     sal_Int32 n;
 112     if( len != 0 )
 113     {
 114         if (*capacity < (*This)->length + len)
 115             rtl_stringbuffer_ensureCapacity( This, capacity, (*This)->length + len );
 116
 117         nOldLen = (*This)->length;
 118         pBuf = (*This)->buffer;
 119
 120         /* copy the tail */
 121         n = (nOldLen - offset);
 122         if( n == 1 )
 123             /* optimized for 1 character */
 124             pBuf[offset + len] = pBuf[offset];
 125         else if( n > 1 )
 126             memmove( pBuf + offset + len, pBuf + offset, n * sizeof(sal_Char) );
 127
 128         /* insert the new characters */
 129         if( str != nullptr )
 130         {
 131             if( len == 1 )
 132                             /* optimized for 1 character */
 133                 pBuf[offset] = *str;
 134             else
 135                 memcpy( pBuf + offset, str, len * sizeof(sal_Char) );
 136         }
 137         (*This)->length = nOldLen + len;
 138         pBuf[ nOldLen + len ] = 0;
 139     }
 140 }
 141
 142 /*************************************************************************
 143  *  rtl_stringbuffer_remove
 144  */
 145 void SAL_CALL rtl_stringbuffer_remove( rtl_String ** This,
 146                                        sal_Int32 start,
 147                                        sal_Int32 len )
 148 {
 149     assert(This);
 150     assert(start >= 0 && start <= (**This).length);
 151     assert(len >= 0);
 152     sal_Int32 nTailLen;
 153     sal_Char * pBuf;
 154
 155     if (len > (*This)->length - start)
 156         len = (*This)->length - start;
 157
 158     //remove nothing
 159     if (!len)
 160         return;
 161
 162     pBuf = (*This)->buffer;
 163     nTailLen = (*This)->length - ( start + len );
 164
 165     if (nTailLen)
 166     {
 167         /* move the tail */
 168         memmove(pBuf + start, pBuf + start + len, nTailLen * sizeof(sal_Char));
 169     }
 170
 171     (*This)->length-=len;
 172     pBuf[ (*This)->length ] = 0;
 173 }
 174
 175 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */