2 // Open Service Platform
3 // Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 // Licensed under the Apache License, Version 2.0 (the License);
6 // you may not use this file except in compliance with the License.
7 // You may obtain a copy of the License at
9 // http://www.apache.org/licenses/LICENSE-2.0
11 // Unless required by applicable law or agreed to in writing, software
12 // distributed under the License is distributed on an "AS IS" BASIS,
13 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 // See the License for the specific language governing permissions and
15 // limitations under the License.
19 * @file FTextAsciiEncoding.h
20 * @brief This is the header file for the %AsciiEncoding class.
22 * This header file contains the declarations of the %AsciiEncoding class. @n
23 * This class is derived from the Encoding class.
25 #ifndef _FTEXT_ASCII_ENCODING_H_
26 #define _FTEXT_ASCII_ENCODING_H_
28 #include <FTextEncoding.h>
31 namespace Tizen { namespace Text
35 * @class AsciiEncoding
36 * @brief This class is an implementation of the American Standard Code for Information Interchange (ASCII) encoding.
40 * @final This class is not intended for extension.
42 * The %AsciiEncoding class encodes Unicode characters as single 7-bit ASCII characters.
43 * This encoding only supports ASCII character values between U+0000 and U+007F.
45 * For more information on the class features, see <a href="../org.tizen.native.appprogramming/html/guide/text/converting_all_text_data.htm">Converting All Text Data at Once</a>.
47 * The following example demonstrates how to use the %AsciiEncoding class.
53 * using namespace Tizen::Base;
54 * using namespace Tizen::Text;
57 * MyClass::AsciiEncodingSample(void)
59 * AsciiEncoding ascii;
61 * String str(L"012345 ABCDE");
64 * ascii.GetByteCount(str, byteCount);
67 * ByteBuffer* pBuffer = ascii.GetBytesN(str);
70 * ascii.GetCharCount(*pBuffer, charCount);
74 * ascii.GetString(*pBuffer, decodedStr);
76 * if (str.Equals(decodedStr))
86 class _OSP_EXPORT_ AsciiEncoding
91 * This is the default constructor for this class.
99 * This is the destructor for this class. @n
100 * This destructor overrides Tizen::Text::Encoding::~Encoding().
105 virtual ~AsciiEncoding(void);
108 * Encodes an instance of the specified Tizen::Base::WcharBuffer into an instance of Tizen::Base::ByteBuffer.
112 * @return A pointer to the Tizen::Base::ByteBuffer instance where the resultant encoded string is stored, @n
113 * else @c null if an exception occurs @n
114 * The buffer limit is the position of the last encoded byte plus one and the starting position is zero.
115 * @param[in] chars An instance of Tizen::Base::WcharBuffer to encode
116 * @exception E_SUCCESS The method is successful.
117 * @exception E_OUT_OF_MEMORY The memory is insufficient.
118 * @exception E_INVALID_ARG The specified @c chars is empty or invalid.
119 * @exception E_INVALID_ENCODING_RANGE The specified string contains code points that are outside the bounds of the character encoding scheme.
120 * @remarks The specific error code can be accessed using the GetLastResult() method.
124 virtual Tizen::Base::ByteBuffer* GetBytesN(const Tizen::Base::WcharBuffer& chars) const;
127 * Encodes an instance of the specified Tizen::Base::String into an instance of Tizen::Base::ByteBuffer.
131 * @return A pointer to the Tizen::Base::ByteBuffer instance where the resultant encoded string is stored, @n
132 * else @c null if an exception occurs @n
133 * The buffer limit is the position of the last encoded byte plus one and the starting position is zero.
134 * @param[in] str A string to encode
135 * @exception E_SUCCESS The method is successful.
136 * @exception E_OUT_OF_MEMORY The memory is insufficient.
137 * @exception E_INVALID_ARG The specified @c str is empty or invalid.
138 * @exception E_INVALID_ENCODING_RANGE The specified string contains code points that are outside the bounds of the character encoding scheme.
139 * @remarks The specific error code can be accessed using the GetLastResult() method.
142 virtual Tizen::Base::ByteBuffer* GetBytesN(const Tizen::Base::String& str) const;
145 * Encodes an instance of Tizen::Base::WcharBuffer into an instance of Tizen::Base::ByteBuffer as per the specified range. @n
146 * The position and limit of the %Tizen::Base::ByteBuffer instance is not changed.
150 * @return An error code
151 * @param[in] chars An instance of Tizen::Base::WcharBuffer to encode
152 * @param[in] charIndex The index from where encoding begins in the Tizen::Base::WcharBuffer instance
153 * @param[in] charCount The total number of characters to encode
154 * @param[out] bytes The Tizen::Base::ByteBuffer instance where the resultant encoded string is stored
155 * @param[in] byteIndex The starting index of the resultant encoding in the Tizen::Base::ByteBuffer instance
156 * @exception E_SUCCESS The method is successful.
157 * @exception E_OUT_OF_MEMORY The memory is insufficient.
158 * @exception E_INVALID_ARG A specified input parameter is invalid, or
159 * the specified @c chars or @c bytes is empty.
160 * @exception E_OUT_OF_RANGE The value of an argument is outside the valid range defined by the method, or
161 * the length of the specified @c charIndex or @c charCount is greater than the length of the specified @c chars.
162 * @exception E_UNDERFLOW This operation has caused the memory to underflow, or
163 * the sum of the length of the specified @c charIndex and @c charCount is greater than the length of the specified @c chars.
164 * @exception E_OVERFLOW This operation has caused the memory to overflow, or
165 * the specified @c bytes does not contain sufficient space to store the encoded characters.
166 * @exception E_INVALID_ENCODING_RANGE The specified string contains code points that are outside the bounds of the character encoding scheme.
169 virtual result GetBytes(const Tizen::Base::WcharBuffer& chars, int charIndex, int charCount, Tizen::Base::ByteBuffer& bytes, int byteIndex = 0) const;
172 * Encodes an instance of Tizen::Base::String into an instance of Tizen::Base::ByteBuffer as per the specified range. @n
173 * The position and limit of the %Tizen::Base::ByteBuffer instance is not changed.
177 * @return An error code
178 * @param[in] str A string to encode
179 * @param[in] charIndex The index from where encoding begins in the Tizen::Base::WcharBuffer instance
180 * @param[in] charCount The total number of characters to encode
181 * @param[out] bytes The Tizen::Base::ByteBuffer instance where the resultant encoded string is stored
182 * @param[in] byteIndex The starting index of the resultant encoding in the Tizen::Base::ByteBuffer instance
183 * @exception E_SUCCESS The method is successful.
184 * @exception E_OUT_OF_MEMORY The memory is insufficient.
185 * @exception E_INVALID_ARG A specified input parameter is invalid, or
186 * the specified @c str or @c bytes is empty.
187 * @exception E_OUT_OF_RANGE The value of an argument is outside the valid range defined by the method, or
188 * the length of the specified @c charIndex or @c charCount is greater than the length of the specified @c str.
189 * @exception E_UNDERFLOW This operation has caused the memory to underflow, or
190 * the sum of the length of the specified @c charIndex and @c charCount is greater than the length of the specified @c str.
191 * @exception E_OVERFLOW This operation has caused the memory to overflow, or
192 * the specified @c bytes does not contain sufficient space to store the encoded characters.
193 * @exception E_INVALID_ENCODING_RANGE The specified string contains code points that are outside the bounds of the character encoding scheme.
196 virtual result GetBytes(const Tizen::Base::String& str, int charIndex, int charCount,
197 Tizen::Base::ByteBuffer& bytes, int byteIndex = 0) const;
200 * Decodes an instance of the specified Tizen::Base::ByteBuffer into an instance of Tizen::Base::WcharBuffer. @n
201 * The %GetCharsN() method does not maintain state consistency between conversions as this method is intended to
202 * convert complete blocks of bytes and characters in one operation and also to decode it in a single step.
206 * @return A pointer to the Tizen::Base::WcharBuffer instance where the resultant decoded data is stored, @n
207 * else @c null if an exception occurs @n
208 * The buffer limit is the position of the last decoded byte plus one and the starting position is zero.
209 * @param[in] bytes An instance of Tizen::Base::ByteBuffer to decode
210 * @exception E_SUCCESS The method is successful.
211 * @exception E_OUT_OF_MEMORY The memory is insufficient.
212 * @exception E_INVALID_ARG The specified @c bytes is empty or invalid.
213 * @exception E_INVALID_ENCODING_RANGE The specified string contains code points that are outside the bounds of the character encoding scheme.
214 * @remarks The specific error code can be accessed using the GetLastResult() method.
217 virtual Tizen::Base::WcharBuffer* GetCharsN(const Tizen::Base::ByteBuffer& bytes) const;
220 * Decodes an instance of Tizen::Base::ByteBuffer into an instance of Tizen::Base::WcharBuffer as per the specified range. @n
221 * The position and limit of the %Tizen::Base::WcharBuffer instance is not changed.
222 * The %GetChars() method does not maintain state consistency between conversions as this is intended to
223 * convert complete blocks of bytes and characters in one operation.
227 * @return An error code
228 * @param[in] bytes An instance of Tizen::Base::ByteBuffer to decode
229 * @param[in] byteIndex The index from where decoding begins
230 * @param[in] byteCount The total number of bytes to decode
231 * @param[out] chars The Tizen::Base::WcharBuffer instance where the resultant decoded string is stored
232 * @param[in] charIndex The index from where encoding begins in the Tizen::Base::WcharBuffer instance
233 * @exception E_SUCCESS The method is successful.
234 * @exception E_OUT_OF_MEMORY The memory is insufficient.
235 * @exception E_INVALID_ARG A specified input parameter is invalid, or
236 * the specified @c bytes or @c chars is empty.
237 * @exception E_OUT_OF_RANGE The value of an argument is outside the valid range defined by the method, or
238 * the length of the specified @c byteIndex or @c byteCount is greater than the length of the specified @c bytes.
239 * @exception E_UNDERFLOW This operation has caused the memory to underflow, or
240 * the sum of the length of the specified @c byteIndex and @c byteCount is greater than the length of the specified @c bytes.
241 * @exception E_OVERFLOW This operation has caused the memory to overflow, or
242 * the specified @c chars does not contain sufficient space to store the decoded bytes.
243 * @exception E_INVALID_ENCODING_RANGE The specified string contains code points that are outside the bounds of the character encoding scheme.
246 virtual result GetChars(const Tizen::Base::ByteBuffer& bytes, int byteIndex, int byteCount, Tizen::Base::WcharBuffer& chars, int charIndex = 0) const;
249 * Gets a string containing the decoded representation of the specified Tizen::Base::ByteBuffer instance.
253 * @return An error code
254 * @param[in] bytes An instance of Tizen::Base::ByteBuffer to decode
255 * @param[out] str A Tizen::Base::String instance @n
256 * It contains the decoded representation of the specified Tizen::Base::ByteBuffer instance.
257 * @exception E_SUCCESS The method is successful.
258 * @exception E_OUT_OF_MEMORY The memory is insufficient.
259 * @exception E_INVALID_ARG A specified input parameter is invalid, or
260 * the specified @c bytes is empty.
261 * @exception E_INVALID_ENCODING_RANGE The specified string contains code points that are outside the bounds of the character encoding scheme.
262 * @remarks This method assumes that the Tizen::Base::ByteBuffer instance contains all the bytes necessary to generate the entire string.
263 * If the bytes are in multiple byte arrays, use the Decoder class, which maintains state consistency
264 * between multiple calls.
267 virtual result GetString(const Tizen::Base::ByteBuffer& bytes, Tizen::Base::String& str) const;
270 * Gets a string containing the decoded representation of the specified Tizen::Base::ByteBuffer instance.
274 * @return An error code
275 * @param[in] bytes An instance of Tizen::Base::ByteBuffer to decode
276 * @param[in] index The index from where decoding begins
277 * @param[in] count The total number of bytes to decode
278 * @param[out] str A Tizen::Base::String instance @n
279 * It contains the decoded representation of the specified Tizen::Base::ByteBuffer instance.
280 * @exception E_SUCCESS The method is successful.
281 * @exception E_OUT_OF_MEMORY The memory is insufficient.
282 * @exception E_INVALID_ARG A specified input parameter is invalid, or
283 * the specified @c bytes is empty.
284 * @exception E_OUT_OF_RANGE The value of an argument is outside the valid range defined by the method, or
285 * the sum of the length of the specified @c index and @c count is greater than the length of the specified @c bytes.
286 * @exception E_UNDERFLOW This operation has caused the memory to underflow, or
287 * the sum of the length of the specified @c index and @c count is greater than the length of the specified @c bytes.
288 * @exception E_INVALID_ENCODING_RANGE The specified string contains code points that are outside the bounds of the character encoding scheme.
289 * @remarks This method assumes that the Tizen::Base::ByteBuffer instance contains all the bytes necessary to generate the entire string.
290 * If the bytes are in multiple byte arrays, use the Decoder class, which maintains state consistency
291 * between multiple calls.
294 virtual result GetString(const Tizen::Base::ByteBuffer& bytes, int index, int count, Tizen::Base::String& str) const;
297 * Gets the maximum number of bytes required for encoding a given number of characters.
301 * @return The maximum number of bytes required for encoding a given number of characters
302 * @param[in] charCount The total number of characters to encode
303 * @remarks This method determines an appropriate buffer size for the byte arrays passed to GetBytes() for encoding.
304 * @see Encoding::GetByteCount()
307 virtual int GetMaxByteCount(int charCount) const;
310 * Gets the maximum number of characters that are generated by decoding the specified number of bytes.
314 * @return The maximum number of characters that are generated by decoding the specified number of bytes
315 * @param[in] byteCount The total number of bytes to encode
316 * @remarks This method determines an appropriate buffer size for character arrays passed to
317 * GetChars() or a decoder for encoding.
318 * @see Encoding::GetCharCount()
321 virtual int GetMaxCharCount(int byteCount) const;
325 * Gets the encoder for the current encoding.
329 * @return A pointer to the Encoder instance for the current encoding
330 * @remarks Contrary to GetBytes(), an encoder can convert partial sequences of characters into
331 * partial sequences of bytes by maintaining the appropriate state between the conversions. @n
332 * At present, only the Utf8Encoding class supports this method. Other classes return @c null.
335 virtual Encoder* GetEncoderN(void) const;
338 * Gets the decoder for the current encoding.
342 * @return A pointer to the Decoder instance for the current encoding
343 * @remarks Contrary to GetChars(), a decoder can convert partial sequences of bytes
344 * into partial sequences of characters by maintaining the appropriate state between the conversions. @n
345 * At present, only the Utf8Encoding class supports this method. Other classes return @c null.
349 virtual Decoder* GetDecoderN(void) const;
352 * Gets the encoding type of the current instance.
356 * @return An encoding type
358 virtual Tizen::Base::String GetEncodingType(void) const;
362 * The implementation of this copy constructor is intentionally blank and declared as private to
363 * prohibit copying of objects.
365 AsciiEncoding(const AsciiEncoding& asciiEncoding);
368 * The implementation of this copy assignment operator is intentionally blank and declared as private
369 * to prohibit copying of objects.
371 AsciiEncoding& operator =(const AsciiEncoding& asciiEncoding);
373 friend class _AsciiEncodingImpl;
374 class _AsciiEncodingImpl* __pAsciiEncodingImpl;
378 #endif //_FTEXT_ASCII_ENCODING_H_