/** * \file * \brief C API: MessageFormat * * <h2>MessageFormat C API </h2> * * <p>MessageFormat prepares strings for display to users, * with optional arguments (variables/placeholders). * The arguments can occur in any order, which is necessary for translation * into languages with different grammars. * * <p>The opaque UMessageFormat type is a thin C wrapper around * a C++ MessageFormat. It is constructed from a <em>pattern</em> string * with arguments in {curly braces} which will be replaced by formatted values. * * <p>Currently, the C API supports only numbered arguments. * * <p>For details about the pattern syntax and behavior, * especially about the ASCII apostrophe vs. the * real apostrophe (single quote) character \htmlonly’\endhtmlonly (U+2019), * see the C++ MessageFormat class documentation. * * <p>Here are some examples of C API usage: * Example 1: * <pre> * \code * UChar *result, *tzID, *str; * UChar pattern[100]; * int32_t resultLengthOut, resultlength; * UCalendar *cal; * UDate d1; * UDateFormat *def1; * UErrorCode status = U_ZERO_ERROR; * * str=(UChar*)malloc(sizeof(UChar) * (strlen("disturbance in force") +1)); * u_uastrcpy(str, "disturbance in force"); * tzID=(UChar*)malloc(sizeof(UChar) * 4); * u_uastrcpy(tzID, "PST"); * cal=ucal_open(tzID, u_strlen(tzID), "en_US", UCAL_TRADITIONAL, &status); * ucal_setDateTime(cal, 1999, UCAL_MARCH, 18, 0, 0, 0, &status); * d1=ucal_getMillis(cal, &status); * u_uastrcpy(pattern, "On {0, date, long}, there was a {1} on planet {2,number,integer}"); * resultlength=0; * resultLengthOut=u_formatMessage( "en_US", pattern, u_strlen(pattern), NULL, resultlength, &status, d1, str, 7); * if(status==U_BUFFER_OVERFLOW_ERROR){ * status=U_ZERO_ERROR; * resultlength=resultLengthOut+1; * result=(UChar*)realloc(result, sizeof(UChar) * resultlength); * u_formatMessage( "en_US", pattern, u_strlen(pattern), result, resultlength, &status, d1, str, 7); * } * printf("%s\n", austrdup(result) );//austrdup( a function used to convert UChar* to char*) * //output>: "On March 18, 1999, there was a disturbance in force on planet 7 * \endcode * </pre> * Typically, the message format will come from resources, and the * arguments will be dynamically set at runtime. * <P> * Example 2: * <pre> * \code * UChar* str; * UErrorCode status = U_ZERO_ERROR; * UChar *result; * UChar pattern[100]; * int32_t resultlength, resultLengthOut, i; * double testArgs= { 100.0, 1.0, 0.0}; * * str=(UChar*)malloc(sizeof(UChar) * 10); * u_uastrcpy(str, "MyDisk"); * u_uastrcpy(pattern, "The disk {1} contains {0,choice,0#no files|1#one file|1<{0,number,integer} files}"); * for(i=0; i<3; i++){ * resultlength=0; * resultLengthOut=u_formatMessage( "en_US", pattern, u_strlen(pattern), NULL, resultlength, &status, testArgs[i], str); * if(status==U_BUFFER_OVERFLOW_ERROR){ * status=U_ZERO_ERROR; * resultlength=resultLengthOut+1; * result=(UChar*)malloc(sizeof(UChar) * resultlength); * u_formatMessage( "en_US", pattern, u_strlen(pattern), result, resultlength, &status, testArgs[i], str); * } * printf("%s\n", austrdup(result) ); //austrdup( a function used to convert UChar* to char*) * free(result); * } * // output, with different testArgs: * // output: The disk "MyDisk" contains 100 files. * // output: The disk "MyDisk" contains one file. * // output: The disk "MyDisk" contains no files. * \endcode * </pre> * * * Example 3: * <pre> * \code * UChar* str; * UChar* str1; * UErrorCode status = U_ZERO_ERROR; * UChar *result; * UChar pattern[100]; * UChar expected[100]; * int32_t resultlength,resultLengthOut;
/** * Format a message for a locale. * This function may perform re-ordering of the arguments depending on the * locale. For all numeric arguments, double is assumed unless the type is * explicitly integer. All choice format arguments must be of type double. * @param locale The locale for which the message will be formatted * @param pattern The pattern specifying the message's format * @param patternLength The length of pattern * @param result A pointer to a buffer to receive the formatted message. * @param resultLength The maximum size of result. * @param status A pointer to an UErrorCode to receive any errors * @param ... A variable-length argument list containing the arguments specified * in pattern. * @return The total buffer size needed; if greater than resultLength, the * output was truncated. * @see u_parseMessage * @stable ICU 2.0
*/
U_CAPI int32_t U_EXPORT2
u_formatMessage(constchar *locale, const UChar *pattern,
int32_t patternLength,
UChar *result,
int32_t resultLength,
UErrorCode *status,
...);
/** * Format a message for a locale. * This function may perform re-ordering of the arguments depending on the * locale. For all numeric arguments, double is assumed unless the type is * explicitly integer. All choice format arguments must be of type double. * @param locale The locale for which the message will be formatted * @param pattern The pattern specifying the message's format * @param patternLength The length of pattern * @param result A pointer to a buffer to receive the formatted message. * @param resultLength The maximum size of result. * @param ap A variable-length argument list containing the arguments specified * @param status A pointer to an UErrorCode to receive any errors * in pattern. * @return The total buffer size needed; if greater than resultLength, the * output was truncated. * @see u_parseMessage * @stable ICU 2.0
*/
U_CAPI int32_t U_EXPORT2
u_vformatMessage( constchar *locale, const UChar *pattern,
int32_t patternLength,
UChar *result,
int32_t resultLength,
va_list ap,
UErrorCode *status);
/** * Parse a message. * For numeric arguments, this function will always use doubles. Integer types * should not be passed. * This function is not able to parse all output from {@link #u_formatMessage }. * @param locale The locale for which the message is formatted * @param pattern The pattern specifying the message's format * @param patternLength The length of pattern * @param source The text to parse. * @param sourceLength The length of source, or -1 if null-terminated. * @param status A pointer to an UErrorCode to receive any errors * @param ... A variable-length argument list containing the arguments * specified in pattern. * @see u_formatMessage * @stable ICU 2.0
*/
U_CAPI void U_EXPORT2
u_parseMessage( constchar *locale, const UChar *pattern,
int32_t patternLength, const UChar *source,
int32_t sourceLength,
UErrorCode *status,
...);
/** * Parse a message. * For numeric arguments, this function will always use doubles. Integer types * should not be passed. * This function is not able to parse all output from {@link #u_formatMessage }. * @param locale The locale for which the message is formatted * @param pattern The pattern specifying the message's format * @param patternLength The length of pattern * @param source The text to parse. * @param sourceLength The length of source, or -1 if null-terminated. * @param ap A variable-length argument list containing the arguments * @param status A pointer to an UErrorCode to receive any errors * specified in pattern. * @see u_formatMessage * @stable ICU 2.0
*/
U_CAPI void U_EXPORT2
u_vparseMessage(constchar *locale, const UChar *pattern,
int32_t patternLength, const UChar *source,
int32_t sourceLength,
va_list ap,
UErrorCode *status);
/** * Format a message for a locale. * This function may perform re-ordering of the arguments depending on the * locale. For all numeric arguments, double is assumed unless the type is * explicitly integer. All choice format arguments must be of type double. * @param locale The locale for which the message will be formatted * @param pattern The pattern specifying the message's format * @param patternLength The length of pattern * @param result A pointer to a buffer to receive the formatted message. * @param resultLength The maximum size of result. * @param status A pointer to an UErrorCode to receive any errors * @param ... A variable-length argument list containing the arguments specified * in pattern. * @param parseError A pointer to UParseError to receive information about errors * occurred during parsing. * @return The total buffer size needed; if greater than resultLength, the * output was truncated. * @see u_parseMessage * @stable ICU 2.0
*/
U_CAPI int32_t U_EXPORT2
u_formatMessageWithError( constchar *locale, const UChar *pattern,
int32_t patternLength,
UChar *result,
int32_t resultLength,
UParseError *parseError,
UErrorCode *status,
...);
/** * Format a message for a locale. * This function may perform re-ordering of the arguments depending on the * locale. For all numeric arguments, double is assumed unless the type is * explicitly integer. All choice format arguments must be of type double. * @param locale The locale for which the message will be formatted * @param pattern The pattern specifying the message's format * @param patternLength The length of pattern * @param result A pointer to a buffer to receive the formatted message. * @param resultLength The maximum size of result. * @param parseError A pointer to UParseError to receive information about errors * occurred during parsing. * @param ap A variable-length argument list containing the arguments specified * @param status A pointer to an UErrorCode to receive any errors * in pattern. * @return The total buffer size needed; if greater than resultLength, the * output was truncated. * @stable ICU 2.0
*/
U_CAPI int32_t U_EXPORT2
u_vformatMessageWithError( constchar *locale, const UChar *pattern,
int32_t patternLength,
UChar *result,
int32_t resultLength,
UParseError* parseError,
va_list ap,
UErrorCode *status);
/** * Parse a message. * For numeric arguments, this function will always use doubles. Integer types * should not be passed. * This function is not able to parse all output from {@link #u_formatMessage }. * @param locale The locale for which the message is formatted * @param pattern The pattern specifying the message's format * @param patternLength The length of pattern * @param source The text to parse. * @param sourceLength The length of source, or -1 if null-terminated. * @param parseError A pointer to UParseError to receive information about errors * occurred during parsing. * @param status A pointer to an UErrorCode to receive any errors * @param ... A variable-length argument list containing the arguments * specified in pattern. * @see u_formatMessage * @stable ICU 2.0
*/
U_CAPI void U_EXPORT2
u_parseMessageWithError(constchar *locale, const UChar *pattern,
int32_t patternLength, const UChar *source,
int32_t sourceLength,
UParseError *parseError,
UErrorCode *status,
...);
/** * Parse a message. * For numeric arguments, this function will always use doubles. Integer types * should not be passed. * This function is not able to parse all output from {@link #u_formatMessage }. * @param locale The locale for which the message is formatted * @param pattern The pattern specifying the message's format * @param patternLength The length of pattern * @param source The text to parse. * @param sourceLength The length of source, or -1 if null-terminated. * @param ap A variable-length argument list containing the arguments * @param parseError A pointer to UParseError to receive information about errors * occurred during parsing. * @param status A pointer to an UErrorCode to receive any errors * specified in pattern. * @see u_formatMessage * @stable ICU 2.0
*/
U_CAPI void U_EXPORT2
u_vparseMessageWithError(constchar *locale, const UChar *pattern,
int32_t patternLength, const UChar *source,
int32_t sourceLength,
va_list ap,
UParseError *parseError,
UErrorCode* status);
/*----------------------- New experimental API --------------------------- */ /** * The message format object * @stable ICU 2.0
*/ typedefvoid* UMessageFormat;
/** * Open a message formatter with given pattern and for the given locale. * @param pattern A pattern specifying the format to use. * @param patternLength Length of the pattern to use * @param locale The locale for which the messages are formatted. * @param parseError A pointer to UParseError struct to receive any errors * occurred during parsing. Can be NULL. * @param status A pointer to an UErrorCode to receive any errors. * @return A pointer to a UMessageFormat to use for formatting * messages, or 0 if an error occurred. * @stable ICU 2.0
*/
U_CAPI UMessageFormat* U_EXPORT2
umsg_open( const UChar *pattern,
int32_t patternLength, constchar *locale,
UParseError *parseError,
UErrorCode *status);
/** * Close a UMessageFormat. * Once closed, a UMessageFormat may no longer be used. * @param format The formatter to close. * @stable ICU 2.0
*/
U_CAPI void U_EXPORT2
umsg_close(UMessageFormat* format);
#if U_SHOW_CPLUSPLUS_API
U_NAMESPACE_BEGIN
/** * \class LocalUMessageFormatPointer * "Smart pointer" class, closes a UMessageFormat via umsg_close(). * For most methods see the LocalPointerBase base class. * * @see LocalPointerBase * @see LocalPointer * @stable ICU 4.4
*/
U_DEFINE_LOCAL_OPEN_POINTER(LocalUMessageFormatPointer, UMessageFormat, umsg_close);
U_NAMESPACE_END
#endif
/** * Open a copy of a UMessageFormat. * This function performs a deep copy. * @param fmt The formatter to copy * @param status A pointer to an UErrorCode to receive any errors. * @return A pointer to a UDateFormat identical to fmt. * @stable ICU 2.0
*/
U_CAPI UMessageFormat U_EXPORT2
umsg_clone(const UMessageFormat *fmt,
UErrorCode *status);
/** * Sets the locale. This locale is used for fetching default number or date * format information. * @param fmt The formatter to set * @param locale The locale the formatter should use. * @stable ICU 2.0
*/
U_CAPI void U_EXPORT2
umsg_setLocale(UMessageFormat *fmt, constchar* locale);
/** * Gets the locale. This locale is used for fetching default number or date * format information. * @param fmt The formatter to querry * @return the locale. * @stable ICU 2.0
*/
U_CAPI constchar* U_EXPORT2
umsg_getLocale(const UMessageFormat *fmt);
/** * Sets the pattern. * @param fmt The formatter to use * @param pattern The pattern to be applied. * @param patternLength Length of the pattern to use * @param parseError Struct to receive information on position * of error if an error is encountered.Can be NULL. * @param status Output param set to success/failure code on * exit. If the pattern is invalid, this will be * set to a failure result. * @stable ICU 2.0
*/
U_CAPI void U_EXPORT2
umsg_applyPattern( UMessageFormat *fmt, const UChar* pattern,
int32_t patternLength,
UParseError* parseError,
UErrorCode* status);
/** * Gets the pattern. * @param fmt The formatter to use * @param result A pointer to a buffer to receive the pattern. * @param resultLength The maximum size of result. * @param status Output param set to success/failure code on * exit. If the pattern is invalid, this will be * set to a failure result. * @return the pattern of the format * @stable ICU 2.0
*/
U_CAPI int32_t U_EXPORT2
umsg_toPattern(const UMessageFormat *fmt,
UChar* result,
int32_t resultLength,
UErrorCode* status);
/** * Format a message for a locale. * This function may perform re-ordering of the arguments depending on the * locale. For all numeric arguments, double is assumed unless the type is * explicitly integer. All choice format arguments must be of type double. * @param fmt The formatter to use * @param result A pointer to a buffer to receive the formatted message. * @param resultLength The maximum size of result. * @param status A pointer to an UErrorCode to receive any errors * @param ... A variable-length argument list containing the arguments * specified in pattern. * @return The total buffer size needed; if greater than resultLength, * the output was truncated. * @stable ICU 2.0
*/
U_CAPI int32_t U_EXPORT2
umsg_format( const UMessageFormat *fmt,
UChar *result,
int32_t resultLength,
UErrorCode *status,
...);
/** * Format a message for a locale. * This function may perform re-ordering of the arguments depending on the * locale. For all numeric arguments, double is assumed unless the type is * explicitly integer. All choice format arguments must be of type double. * @param fmt The formatter to use * @param result A pointer to a buffer to receive the formatted message. * @param resultLength The maximum size of result. * @param ap A variable-length argument list containing the arguments * @param status A pointer to an UErrorCode to receive any errors * specified in pattern. * @return The total buffer size needed; if greater than resultLength, * the output was truncated. * @stable ICU 2.0
*/
U_CAPI int32_t U_EXPORT2
umsg_vformat( const UMessageFormat *fmt,
UChar *result,
int32_t resultLength,
va_list ap,
UErrorCode *status);
/** * Parse a message. * For numeric arguments, this function will always use doubles. Integer types * should not be passed. * This function is not able to parse all output from {@link #umsg_format }. * @param fmt The formatter to use * @param source The text to parse. * @param sourceLength The length of source, or -1 if null-terminated. * @param count Output param to receive number of elements returned. * @param status A pointer to an UErrorCode to receive any errors * @param ... A variable-length argument list containing the arguments * specified in pattern. * @stable ICU 2.0
*/
U_CAPI void U_EXPORT2
umsg_parse( const UMessageFormat *fmt, const UChar *source,
int32_t sourceLength,
int32_t *count,
UErrorCode *status,
...);
/** * Parse a message. * For numeric arguments, this function will always use doubles. Integer types * should not be passed. * This function is not able to parse all output from {@link #umsg_format }. * @param fmt The formatter to use * @param source The text to parse. * @param sourceLength The length of source, or -1 if null-terminated. * @param count Output param to receive number of elements returned. * @param ap A variable-length argument list containing the arguments * @param status A pointer to an UErrorCode to receive any errors * specified in pattern. * @see u_formatMessage * @stable ICU 2.0
*/
U_CAPI void U_EXPORT2
umsg_vparse(const UMessageFormat *fmt, const UChar *source,
int32_t sourceLength,
int32_t *count,
va_list ap,
UErrorCode *status);
/** * Convert an 'apostrophe-friendly' pattern into a standard * pattern. Standard patterns treat all apostrophes as * quotes, which is problematic in some languages, e.g. * French, where apostrophe is commonly used. This utility * assumes that only an unpaired apostrophe immediately before * a brace is a true quote. Other unpaired apostrophes are paired, * and the resulting standard pattern string is returned. * * <p><b>Note</b> it is not guaranteed that the returned pattern * is indeed a valid pattern. The only effect is to convert * between patterns having different quoting semantics. * * @param pattern the 'apostrophe-friendly' patttern to convert * @param patternLength the length of pattern, or -1 if unknown and pattern is null-terminated * @param dest the buffer for the result, or NULL if preflight only * @param destCapacity the length of the buffer, or 0 if preflighting * @param ec the error code * @return the length of the resulting text, not including trailing null * if buffer has room for the trailing null, it is provided, otherwise * not * @stable ICU 3.4
*/
U_CAPI int32_t U_EXPORT2
umsg_autoQuoteApostrophe(const UChar* pattern,
int32_t patternLength,
UChar* dest,
int32_t destCapacity,
UErrorCode* ec);
#endif/* #if !UCONFIG_NO_FORMATTING */
#endif
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