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