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