sal/rtl/ustrbuf.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 <osl/diagnose.h>
  24
  25 #include <rtl/ustrbuf.hxx>
  26 #include <strimp.hxx>
  27
  28 #if USE_SDT_PROBES
  29 #define RTL_LOG_STRING_BITS         16
  30 #endif
  31
  32 void SAL_CALL rtl_uStringbuffer_newFromStr_WithLength( rtl_uString ** newStr,
  33                                                        const sal_Unicode * value,
  34                                                        sal_Int32 count)
  35 {
  36     assert(newStr);
  37     assert(count >= 0);
  38     if (!value)
  39     {
  40         rtl_uString_new_WithLength( newStr, 16 );
  41         return;
  42     }
  43
  44     rtl_uString_new_WithLength( newStr, count + 16 );
  45     (*newStr)->length = count;
  46     memcpy( (*newStr)->buffer, value, count * sizeof(sal_Unicode));
  47     RTL_LOG_STRING_NEW( *newStr );
  48     return;
  49 }
  50
  51 rtl_uString * SAL_CALL rtl_uStringBuffer_refReturn( rtl_uString * pThis )
  52 {
  53     RTL_LOG_STRING_NEW( pThis );
  54     rtl_uString_acquire( pThis );
  55     return pThis;
  56 }
  57
  58 rtl_uString * SAL_CALL rtl_uStringBuffer_makeStringAndClear( rtl_uString ** ppThis,
  59                                                              sal_Int32 *nCapacity )
  60 {
  61     assert(ppThis);
  62     assert(nCapacity);
  63     // avoid an un-necessary atomic ref/unref pair
  64     rtl_uString *pStr = *ppThis;
  65     *ppThis = NULL;
  66
  67     rtl_uString_new (ppThis);
  68     *nCapacity = 0;
  69
  70     RTL_LOG_STRING_NEW( pStr );
  71
  72     return pStr;
  73 }
  74
  75 sal_Int32 SAL_CALL rtl_uStringbuffer_newFromStringBuffer( rtl_uString ** newStr,
  76                                                           sal_Int32 capacity,
  77                                                           rtl_uString * oldStr )
  78 {
  79     assert(newStr);
  80     assert(capacity >= 0);
  81     assert(oldStr);
  82     sal_Int32 newCapacity = capacity;
  83
  84     if (newCapacity < oldStr->length)
  85         newCapacity = oldStr->length;
  86
  87     rtl_uString_new_WithLength( newStr, newCapacity );
  88
  89     if (oldStr->length > 0) {
  90         (*newStr)->length = oldStr->length;
  91         memcpy( (*newStr)->buffer, oldStr->buffer, oldStr->length * sizeof(sal_Unicode));
  92     }
  93     RTL_LOG_STRING_NEW( *newStr );
  94     return newCapacity;
  95 }
  96
  97 void SAL_CALL rtl_uStringbuffer_ensureCapacity
  98     (rtl_uString ** This, sal_Int32* capacity, sal_Int32 minimumCapacity)
  99 {
 100     assert(This);
 101     assert(capacity && *capacity >= 0);
 102     assert(minimumCapacity >= 0);
 103     if (minimumCapacity > *capacity)
 104     {
 105         rtl_uString * pTmp = *This;
 106         rtl_uString * pNew = NULL;
 107         *capacity = ((*This)->length + 1) * 2;
 108         if (minimumCapacity > *capacity)
 109             /* still lower, set to the minimum capacity */
 110             *capacity = minimumCapacity;
 111
 112         rtl_uString_new_WithLength(&pNew, *capacity);
 113         pNew->length = (*This)->length;
 114         *This = pNew;
 115
 116         memcpy( (*This)->buffer, pTmp->buffer, pTmp->length * sizeof(sal_Unicode) );
 117
 118         RTL_LOG_STRING_NEW( pTmp ); // with accurate contents
 119         rtl_uString_release( pTmp );
 120     }
 121 }
 122
 123 void SAL_CALL rtl_uStringbuffer_insert( rtl_uString ** This,
 124                                         sal_Int32 * capacity,
 125                                         sal_Int32 offset,
 126                                         const sal_Unicode * str,
 127                                         sal_Int32 len)
 128 {
 129     assert(This);
 130     assert(capacity && *capacity >= 0);
 131     assert(offset >= 0 && offset <= (**This).length);
 132     assert(len >= 0);
 133     sal_Int32 nOldLen;
 134     sal_Unicode * pBuf;
 135     sal_Int32 n;
 136     if( len != 0 )
 137     {
 138         if (*capacity < (*This)->length + len)
 139             rtl_uStringbuffer_ensureCapacity( This, capacity, (*This)->length + len );
 140
 141         nOldLen = (*This)->length;
 142         pBuf = (*This)->buffer;
 143
 144         /* copy the tail */
 145         n = (nOldLen - offset);
 146         if( n == 1 )
 147                             /* optimized for 1 character */
 148             pBuf[offset + len] = pBuf[offset];
 149         else if( n > 1 )
 150             memmove( pBuf + offset + len, pBuf + offset, n * sizeof(sal_Unicode) );
 151
 152         /* insert the new characters */
 153         if( str != nullptr )
 154         {
 155             if( len == 1 )
 156                 /* optimized for 1 character */
 157                 pBuf[offset] = *str;
 158             else
 159                 memcpy( pBuf + offset, str, len * sizeof(sal_Unicode) );
 160         }
 161         (*This)->length = nOldLen + len;
 162         pBuf[ nOldLen + len ] = 0;
 163     }
 164 }
 165
 166 void rtl_uStringbuffer_insertUtf32(
 167     rtl_uString ** pThis, sal_Int32 * capacity, sal_Int32 offset, sal_uInt32 c)
 168     SAL_THROW_EXTERN_C()
 169 {
 170     sal_Unicode buf[2];
 171     sal_Int32 len;
 172     OSL_ASSERT(c <= 0x10FFFF && !(c >= 0xD800 && c <= 0xDFFF));
 173     if (c <= 0xFFFF) {
 174         buf[0] = (sal_Unicode) c;
 175         len = 1;
 176     } else {
 177         c -= 0x10000;
 178         buf[0] = (sal_Unicode) ((c >> 10) | 0xD800);
 179         buf[1] = (sal_Unicode) ((c & 0x3FF) | 0xDC00);
 180         len = 2;
 181     }
 182     rtl_uStringbuffer_insert(pThis, capacity, offset, buf, len);
 183 }
 184
 185 void SAL_CALL rtl_uStringbuffer_insert_ascii(   /*inout*/rtl_uString ** This,
 186                                                 /*inout*/sal_Int32 * capacity,
 187                                                 sal_Int32 offset,
 188                                                 const sal_Char * str,
 189                                                 sal_Int32 len)
 190 {
 191     assert(This);
 192     assert(capacity && *capacity >= 0);
 193     assert(offset >= 0 && offset <= (**This).length);
 194     assert(len == 0 || str != nullptr);
 195     assert(len >= 0);
 196     sal_Int32 nOldLen;
 197     sal_Unicode * pBuf;
 198     sal_Int32 n;
 199     if( len != 0 )
 200     {
 201         if (*capacity < (*This)->length + len)
 202             rtl_uStringbuffer_ensureCapacity( This, capacity, (*This)->length + len );
 203
 204         nOldLen = (*This)->length;
 205         pBuf = (*This)->buffer;
 206
 207         /* copy the tail */
 208         n = (nOldLen - offset);
 209         if( n == 1 )
 210             /* optimized for 1 character */
 211             pBuf[offset + len] = pBuf[offset];
 212         else if( n > 1 )
 213             memmove( pBuf + offset + len, pBuf + offset, n * sizeof(sal_Unicode) );
 214
 215         /* insert the new characters */
 216         for( n = 0; n < len; n++ )
 217         {
 218             /* Check ASCII range */
 219             OSL_ENSURE( (*str & 0x80) == 0, "Found ASCII char > 127");
 220
 221             pBuf[offset + n] = (sal_Unicode)*(str++);
 222         }
 223
 224         (*This)->length = nOldLen + len;
 225         pBuf[ nOldLen + len ] = 0;
 226     }
 227 }
 228
 229 /*************************************************************************
 230  *  rtl_uStringbuffer_remove
 231  */
 232 void SAL_CALL rtl_uStringbuffer_remove( rtl_uString ** This,
 233                                        sal_Int32 start,
 234                                        sal_Int32 len )
 235 {
 236     assert(This);
 237     assert(start >= 0 && start <= (**This).length);
 238     assert(len >= 0);
 239     sal_Int32 nTailLen;
 240     sal_Unicode * pBuf;
 241
 242     if (len > (*This)->length - start)
 243         len = (*This)->length - start;
 244
 245     //remove nothing
 246     if (!len)
 247         return;
 248
 249     pBuf = (*This)->buffer;
 250     nTailLen = (*This)->length - ( start + len );
 251
 252     if (nTailLen)
 253     {
 254         /* move the tail */
 255         memmove(pBuf + start, pBuf + start + len, nTailLen * sizeof(sal_Unicode));
 256     }
 257
 258     (*This)->length-=len;
 259     pBuf[ (*This)->length ] = 0;
 260 }
 261
 262 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */