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| 1 /* | |
| 2 ******************************************************************************** | |
| 3 * Copyright (C) 1997-2010, International Business Machines Corporation and other
s. | |
| 4 * All Rights Reserved. | |
| 5 ******************************************************************************** | |
| 6 * | |
| 7 * File FORMAT.H | |
| 8 * | |
| 9 * Modification History: | |
| 10 * | |
| 11 * Date Name Description | |
| 12 * 02/19/97 aliu Converted from java. | |
| 13 * 03/17/97 clhuang Updated per C++ implementation. | |
| 14 * 03/27/97 helena Updated to pass the simple test after code review. | |
| 15 ******************************************************************************** | |
| 16 */ | |
| 17 // ***************************************************************************** | |
| 18 // This file was generated from the java source file Format.java | |
| 19 // ***************************************************************************** | |
| 20 | |
| 21 #ifndef FORMAT_H | |
| 22 #define FORMAT_H | |
| 23 | |
| 24 | |
| 25 #include "unicode/utypes.h" | |
| 26 | |
| 27 /** | |
| 28 * \file | |
| 29 * \brief C++ API: Base class for all formats. | |
| 30 */ | |
| 31 | |
| 32 #if !UCONFIG_NO_FORMATTING | |
| 33 | |
| 34 #include "unicode/unistr.h" | |
| 35 #include "unicode/fmtable.h" | |
| 36 #include "unicode/fieldpos.h" | |
| 37 #include "unicode/fpositer.h" | |
| 38 #include "unicode/parsepos.h" | |
| 39 #include "unicode/parseerr.h" | |
| 40 #include "unicode/locid.h" | |
| 41 | |
| 42 U_NAMESPACE_BEGIN | |
| 43 | |
| 44 /** | |
| 45 * Base class for all formats. This is an abstract base class which | |
| 46 * specifies the protocol for classes which convert other objects or | |
| 47 * values, such as numeric values and dates, and their string | |
| 48 * representations. In some cases these representations may be | |
| 49 * localized or contain localized characters or strings. For example, | |
| 50 * a numeric formatter such as DecimalFormat may convert a numeric | |
| 51 * value such as 12345 to the string "$12,345". It may also parse | |
| 52 * the string back into a numeric value. A date and time formatter | |
| 53 * like SimpleDateFormat may represent a specific date, encoded | |
| 54 * numerically, as a string such as "Wednesday, February 26, 1997 AD". | |
| 55 * <P> | |
| 56 * Many of the concrete subclasses of Format employ the notion of | |
| 57 * a pattern. A pattern is a string representation of the rules which | |
| 58 * govern the interconversion between values and strings. For example, | |
| 59 * a DecimalFormat object may be associated with the pattern | |
| 60 * "$#,##0.00;($#,##0.00)", which is a common US English format for | |
| 61 * currency values, yielding strings such as "$1,234.45" for 1234.45, | |
| 62 * and "($987.65)" for 987.6543. The specific syntax of a pattern | |
| 63 * is defined by each subclass. | |
| 64 * <P> | |
| 65 * Even though many subclasses use patterns, the notion of a pattern | |
| 66 * is not inherent to Format classes in general, and is not part of | |
| 67 * the explicit base class protocol. | |
| 68 * <P> | |
| 69 * Two complex formatting classes bear mentioning. These are | |
| 70 * MessageFormat and ChoiceFormat. ChoiceFormat is a subclass of | |
| 71 * NumberFormat which allows the user to format different number ranges | |
| 72 * as strings. For instance, 0 may be represented as "no files", 1 as | |
| 73 * "one file", and any number greater than 1 as "many files". | |
| 74 * MessageFormat is a formatter which utilizes other Format objects to | |
| 75 * format a string containing with multiple values. For instance, | |
| 76 * A MessageFormat object might produce the string "There are no files | |
| 77 * on the disk MyDisk on February 27, 1997." given the arguments 0, | |
| 78 * "MyDisk", and the date value of 2/27/97. See the ChoiceFormat | |
| 79 * and MessageFormat headers for further information. | |
| 80 * <P> | |
| 81 * If formatting is unsuccessful, a failing UErrorCode is returned when | |
| 82 * the Format cannot format the type of object, otherwise if there is | |
| 83 * something illformed about the the Unicode replacement character | |
| 84 * 0xFFFD is returned. | |
| 85 * <P> | |
| 86 * If there is no match when parsing, a parse failure UErrorCode is | |
| 87 * retured for methods which take no ParsePosition. For the method | |
| 88 * that takes a ParsePosition, the index parameter is left unchanged. | |
| 89 * <P> | |
| 90 * <em>User subclasses are not supported.</em> While clients may write | |
| 91 * subclasses, such code will not necessarily work and will not be | |
| 92 * guaranteed to work stably from release to release. | |
| 93 */ | |
| 94 class U_I18N_API Format : public UObject { | |
| 95 public: | |
| 96 | |
| 97 /** Destructor | |
| 98 * @stable ICU 2.4 | |
| 99 */ | |
| 100 virtual ~Format(); | |
| 101 | |
| 102 /** | |
| 103 * Return true if the given Format objects are semantically equal. | |
| 104 * Objects of different subclasses are considered unequal. | |
| 105 * @param other the object to be compared with. | |
| 106 * @return Return true if the given Format objects are semantically
equal. | |
| 107 * Objects of different subclasses are considered unequal. | |
| 108 * @stable ICU 2.0 | |
| 109 */ | |
| 110 virtual UBool operator==(const Format& other) const = 0; | |
| 111 | |
| 112 /** | |
| 113 * Return true if the given Format objects are not semantically | |
| 114 * equal. | |
| 115 * @param other the object to be compared with. | |
| 116 * @return Return true if the given Format objects are not semantica
lly. | |
| 117 * @stable ICU 2.0 | |
| 118 */ | |
| 119 UBool operator!=(const Format& other) const { return !operator==(other); } | |
| 120 | |
| 121 /** | |
| 122 * Clone this object polymorphically. The caller is responsible | |
| 123 * for deleting the result when done. | |
| 124 * @return A copy of the object | |
| 125 * @stable ICU 2.0 | |
| 126 */ | |
| 127 virtual Format* clone() const = 0; | |
| 128 | |
| 129 /** | |
| 130 * Formats an object to produce a string. | |
| 131 * | |
| 132 * @param obj The object to format. | |
| 133 * @param appendTo Output parameter to receive result. | |
| 134 * Result is appended to existing contents. | |
| 135 * @param status Output parameter filled in with success or failure statu
s. | |
| 136 * @return Reference to 'appendTo' parameter. | |
| 137 * @stable ICU 2.0 | |
| 138 */ | |
| 139 UnicodeString& format(const Formattable& obj, | |
| 140 UnicodeString& appendTo, | |
| 141 UErrorCode& status) const; | |
| 142 | |
| 143 /** | |
| 144 * Format an object to produce a string. This is a pure virtual method whic
h | |
| 145 * subclasses must implement. This method allows polymorphic formatting | |
| 146 * of Formattable objects. If a subclass of Format receives a Formattable | |
| 147 * object type it doesn't handle (e.g., if a numeric Formattable is passed | |
| 148 * to a DateFormat object) then it returns a failing UErrorCode. | |
| 149 * | |
| 150 * @param obj The object to format. | |
| 151 * @param appendTo Output parameter to receive result. | |
| 152 * Result is appended to existing contents. | |
| 153 * @param pos On input: an alignment field, if desired. | |
| 154 * On output: the offsets of the alignment field. | |
| 155 * @param status Output param filled with success/failure status. | |
| 156 * @return Reference to 'appendTo' parameter. | |
| 157 * @stable ICU 2.0 | |
| 158 */ | |
| 159 virtual UnicodeString& format(const Formattable& obj, | |
| 160 UnicodeString& appendTo, | |
| 161 FieldPosition& pos, | |
| 162 UErrorCode& status) const = 0; | |
| 163 /** | |
| 164 * Format an object to produce a string. Subclasses should override this | |
| 165 * method. This method allows polymorphic formatting of Formattable objects. | |
| 166 * If a subclass of Format receives a Formattable object type it doesn't | |
| 167 * handle (e.g., if a numeric Formattable is passed to a DateFormat object) | |
| 168 * then it returns a failing UErrorCode. | |
| 169 * | |
| 170 * @param obj The object to format. | |
| 171 * @param appendTo Output parameter to receive result. | |
| 172 * Result is appended to existing contents. | |
| 173 * @param posIter On return, can be used to iterate over positions | |
| 174 * of fields generated by this format call. | |
| 175 * @param status Output param filled with success/failure status. | |
| 176 * @return Reference to 'appendTo' parameter. | |
| 177 * @stable ICU 4.4 | |
| 178 */ | |
| 179 virtual UnicodeString& format(const Formattable& obj, | |
| 180 UnicodeString& appendTo, | |
| 181 FieldPositionIterator* posIter, | |
| 182 UErrorCode& status) const; | |
| 183 | |
| 184 /** | |
| 185 * Parse a string to produce an object. This is a pure virtual | |
| 186 * method which subclasses must implement. This method allows | |
| 187 * polymorphic parsing of strings into Formattable objects. | |
| 188 * <P> | |
| 189 * Before calling, set parse_pos.index to the offset you want to | |
| 190 * start parsing at in the source. After calling, parse_pos.index | |
| 191 * is the end of the text you parsed. If error occurs, index is | |
| 192 * unchanged. | |
| 193 * <P> | |
| 194 * When parsing, leading whitespace is discarded (with successful | |
| 195 * parse), while trailing whitespace is left as is. | |
| 196 * <P> | |
| 197 * Example: | |
| 198 * <P> | |
| 199 * Parsing "_12_xy" (where _ represents a space) for a number, | |
| 200 * with index == 0 will result in the number 12, with | |
| 201 * parse_pos.index updated to 3 (just before the second space). | |
| 202 * Parsing a second time will result in a failing UErrorCode since | |
| 203 * "xy" is not a number, and leave index at 3. | |
| 204 * <P> | |
| 205 * Subclasses will typically supply specific parse methods that | |
| 206 * return different types of values. Since methods can't overload | |
| 207 * on return types, these will typically be named "parse", while | |
| 208 * this polymorphic method will always be called parseObject. Any | |
| 209 * parse method that does not take a parse_pos should set status | |
| 210 * to an error value when no text in the required format is at the | |
| 211 * start position. | |
| 212 * | |
| 213 * @param source The string to be parsed into an object. | |
| 214 * @param result Formattable to be set to the parse result. | |
| 215 * If parse fails, return contents are undefined. | |
| 216 * @param parse_pos The position to start parsing at. Upon return | |
| 217 * this param is set to the position after the | |
| 218 * last character successfully parsed. If the | |
| 219 * source is not parsed successfully, this param | |
| 220 * will remain unchanged. | |
| 221 * @stable ICU 2.0 | |
| 222 */ | |
| 223 virtual void parseObject(const UnicodeString& source, | |
| 224 Formattable& result, | |
| 225 ParsePosition& parse_pos) const = 0; | |
| 226 | |
| 227 /** | |
| 228 * Parses a string to produce an object. This is a convenience method | |
| 229 * which calls the pure virtual parseObject() method, and returns a | |
| 230 * failure UErrorCode if the ParsePosition indicates failure. | |
| 231 * | |
| 232 * @param source The string to be parsed into an object. | |
| 233 * @param result Formattable to be set to the parse result. | |
| 234 * If parse fails, return contents are undefined. | |
| 235 * @param status Output param to be filled with success/failure | |
| 236 * result code. | |
| 237 * @stable ICU 2.0 | |
| 238 */ | |
| 239 void parseObject(const UnicodeString& source, | |
| 240 Formattable& result, | |
| 241 UErrorCode& status) const; | |
| 242 | |
| 243 /** Get the locale for this format object. You can choose between valid and
actual locale. | |
| 244 * @param type type of the locale we're looking for (valid or actual) | |
| 245 * @param status error code for the operation | |
| 246 * @return the locale | |
| 247 * @stable ICU 2.8 | |
| 248 */ | |
| 249 Locale getLocale(ULocDataLocaleType type, UErrorCode& status) const; | |
| 250 | |
| 251 /** Get the locale for this format object. You can choose between valid and
actual locale. | |
| 252 * @param type type of the locale we're looking for (valid or actual) | |
| 253 * @param status error code for the operation | |
| 254 * @return the locale | |
| 255 * @internal | |
| 256 */ | |
| 257 const char* getLocaleID(ULocDataLocaleType type, UErrorCode &status) const; | |
| 258 | |
| 259 protected: | |
| 260 /** @stable ICU 2.8 */ | |
| 261 void setLocaleIDs(const char* valid, const char* actual); | |
| 262 | |
| 263 protected: | |
| 264 /** | |
| 265 * Default constructor for subclass use only. Does nothing. | |
| 266 * @stable ICU 2.0 | |
| 267 */ | |
| 268 Format(); | |
| 269 | |
| 270 /** | |
| 271 * @stable ICU 2.0 | |
| 272 */ | |
| 273 Format(const Format&); // Does nothing; for subclasses only | |
| 274 | |
| 275 /** | |
| 276 * @stable ICU 2.0 | |
| 277 */ | |
| 278 Format& operator=(const Format&); // Does nothing; for subclasses | |
| 279 | |
| 280 | |
| 281 /** | |
| 282 * Simple function for initializing a UParseError from a UnicodeString. | |
| 283 * | |
| 284 * @param pattern The pattern to copy into the parseError | |
| 285 * @param pos The position in pattern where the error occured | |
| 286 * @param parseError The UParseError object to fill in | |
| 287 * @stable ICU 2.4 | |
| 288 */ | |
| 289 static void syntaxError(const UnicodeString& pattern, | |
| 290 int32_t pos, | |
| 291 UParseError& parseError); | |
| 292 | |
| 293 private: | |
| 294 char actualLocale[ULOC_FULLNAME_CAPACITY]; | |
| 295 char validLocale[ULOC_FULLNAME_CAPACITY]; | |
| 296 }; | |
| 297 | |
| 298 U_NAMESPACE_END | |
| 299 | |
| 300 #endif /* #if !UCONFIG_NO_FORMATTING */ | |
| 301 | |
| 302 #endif // _FORMAT | |
| 303 //eof | |
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Chromium Code Reviews
Issue 6463014:
Move header files (ICU 4.6) from source/{common,i18n}/unicode... (Closed)
Base URL: svn://chrome-svn/chrome/trunk/deps/third_party/