Newer
Older
* Copyright (c) 1999-2000 The Apache Software Foundation. All rights
* reserved.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. The end-user documentation included with the redistribution,
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
* 4. The names "Xerces" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation, and was
* originally based on software copyright (c) 1999, International
* Business Machines, Inc., http://www.ibm.com . For more information
* on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
// ---------------------------------------------------------------------------
// Includes
// ---------------------------------------------------------------------------
#include <xercesc/util/BitOps.hpp>
#include <xercesc/util/XMLUTF16Transcoder.hpp>
#include <xercesc/util/TranscodingException.hpp>
#include <string.h>
// ---------------------------------------------------------------------------
// XMLUTF16Transcoder: Constructors and Destructor
// ---------------------------------------------------------------------------
XMLUTF16Transcoder::XMLUTF16Transcoder( const XMLCh* const encodingName
, const unsigned int blockSize
David Abram Cargill
committed
, const bool swapped
, MemoryManager* const manager) :
David Abram Cargill
committed
XMLTranscoder(encodingName, blockSize, manager)
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
, fSwapped(swapped)
{
}
XMLUTF16Transcoder::~XMLUTF16Transcoder()
{
}
// ---------------------------------------------------------------------------
// XMLUTF16Transcoder: Implementation of the transcoder API
// ---------------------------------------------------------------------------
unsigned int
XMLUTF16Transcoder::transcodeFrom( const XMLByte* const srcData
, const unsigned int srcCount
, XMLCh* const toFill
, const unsigned int maxChars
, unsigned int& bytesEaten
, unsigned char* const charSizes)
{
// If debugging, make sure that the block size is legal
#if defined(XERCES_DEBUG)
checkBlockSize(maxChars);
#endif
//
// Calculate the max chars we can do here. Its the lesser of the
// max output chars and the number of chars in the source.
//
const unsigned int srcChars = srcCount / sizeof(UTF16Ch);
const unsigned int countToDo = srcChars < maxChars ? srcChars : maxChars;
// Look at the source data as UTF16 chars
const UTF16Ch* asUTF16 = (const UTF16Ch*)srcData;
// And get a mutable pointer to the output
XMLCh* outPtr = toFill;
//
// If its swapped, we have to do a char by char swap and cast. Else
// we have to check whether our XMLCh and UTF16Ch types are the same
// size or not. If so, we can optimize by just doing a buffer copy.
//
if (fSwapped)
{
//
// And then do the swapping loop for the count we precalculated. Note
// that this also handles size conversion as well if XMLCh is not the
// same size as UTF16Ch.
//
for (unsigned int index = 0; index < countToDo; index++)
*outPtr++ = BitOps::swapBytes(*asUTF16++);
}
else
{
//
// If the XMLCh type is the same size as a UTF16 value on this
// platform, then we can do just a buffer copy straight to the target
// buffer since our source chars are UTF-16 chars. If its not, then
// we still have to do a loop and assign each one, in order to
// implicitly convert.
//
if (sizeof(XMLCh) == sizeof(UTF16Ch))
{
// Notice we convert char count to byte count here!!!
memcpy(toFill, srcData, countToDo * sizeof(UTF16Ch));
}
else
{
for (unsigned int index = 0; index < countToDo; index++)
*outPtr++ = XMLCh(*asUTF16++);
}
}
// Set the bytes eaten
bytesEaten = countToDo * sizeof(UTF16Ch);
// Set the character sizes to the fixed size
memset(charSizes, sizeof(UTF16Ch), countToDo);
// Return the chars we transcoded
return countToDo;
}
unsigned int
XMLUTF16Transcoder::transcodeTo(const XMLCh* const srcData
, const unsigned int srcCount
, XMLByte* const toFill
, const unsigned int maxBytes
, unsigned int& charsEaten
, const UnRepOpts options)
{
// If debugging, make sure that the block size is legal
#if defined(XERCES_DEBUG)
checkBlockSize(maxBytes);
#endif
//
// Calculate the max chars we can do here. Its the lesser of the
// chars that we can fit into the output buffer, and the source
// chars available.
//
const unsigned int maxOutChars = maxBytes / sizeof(UTF16Ch);
const unsigned int countToDo = srcCount < maxOutChars ? srcCount : maxOutChars;
//
// Get a pointer tot he output buffer in the UTF-16 character format
// that we need to work with. And get a mutable pointer to the source
// character buffer.
//
UTF16Ch* outPtr = (UTF16Ch*)toFill;
const XMLCh* srcPtr = srcData;
//
// If the target format is swapped from our native format, then handle
// it one way, else handle it another.
//
if (fSwapped)
{
//
// And then do the swapping loop for the count we precalculated. Note
// that this also handles size conversion as well if XMLCh is not the
// same size as UTF16Ch.
//
for (unsigned int index = 0; index < countToDo; index++)
{
// To avoid flakey compilers, use a temp
const UTF16Ch tmpCh = UTF16Ch(*srcPtr++);
*outPtr++ = BitOps::swapBytes(tmpCh);
}
}
else
{
//
// If XMLCh and UTF16Ch are the same size, we can just do a fast
// memory copy. Otherwise, we have to do a loop and downcast each
// character into its new 16 bit storage.
//
if (sizeof(XMLCh) == sizeof(UTF16Ch))
{
// Notice we convert char count to byte count here!!!
memcpy(toFill, srcData, countToDo * sizeof(UTF16Ch));
}
else
{
for (unsigned int index = 0; index < countToDo; index++)
*outPtr++ = UTF16Ch(*srcPtr++);
}
}
// Set the chars eaten to the calculated number we ate
charsEaten = countToDo;
//Return the bytes we ate. Note we convert to a byte count here!
return countToDo * sizeof(UTF16Ch);
}
bool XMLUTF16Transcoder::canTranscodeTo(const unsigned int toCheck) const
{
// We can handle anything
return true;
}