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/*
*******************************************************************************
* Copyright (C) 1996-2006, International Business Machines Corporation
* and others. All Rights Reserved.
*******************************************************************************
*
* file name: umsg.h
* encoding: US-ASCII
* tab size: 8 (not used)
* indentation:4
*
* Change history:
*
* 08/5/2001 Ram Added C wrappers for C++ API.
*
*
*/
#ifndef UMSG_H
#define UMSG_H
#include "unicode/utypes.h"
#if !UCONFIG_NO_FORMATTING
#include "unicode/uloc.h"
#include "unicode/parseerr.h"
#include <stdarg.h>
/**
* \file
* \brief C API: MessageFormat
*
* <h2>Message Format C API </h2>
*
* Provides means to produce concatenated messages in language-neutral way.
* Use this for all concatenations that show up to end users.
* <P>
* Takes a set of objects, formats them, then inserts the formatted
* strings into the pattern at the appropriate places.
* <P>
* Here are some examples of 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>
*
* The pattern is of the following form. Legend:
* <pre>
* \code
* {optional item}
* (group that may be repeated)*
* \endcode
* </pre>
* Do not confuse optional items with items inside quotes braces, such
* as this: "{". Quoted braces are literals.
* <pre>
* \code
* messageFormatPattern := string ( "{" messageFormatElement "}" string )*
*
* messageFormatElement := argument { "," elementFormat }
*
* elementFormat := "time" { "," datetimeStyle }
* | "date" { "," datetimeStyle }
* | "number" { "," numberStyle }
* | "choice" "," choiceStyle
*
* datetimeStyle := "short"
* | "medium"
* | "long"
* | "full"
* | dateFormatPattern
*
* numberStyle := "currency"
* | "percent"
* | "integer"
* | numberFormatPattern
*
* choiceStyle := choiceFormatPattern
* \endcode
* </pre>
* If there is no elementFormat, then the argument must be a string,
* which is substituted. If there is no dateTimeStyle or numberStyle,
* then the default format is used (e.g. NumberFormat.getInstance(),
* DateFormat.getDefaultTime() or DateFormat.getDefaultDate(). For
* a ChoiceFormat, the pattern must always be specified, since there
* is no default.
* <P>
* In strings, single quotes can be used to quote the "{" sign if
* necessary. A real single quote is represented by ''. Inside a
* messageFormatElement, quotes are [not] removed. For example,
* {1,number,$'#',##} will produce a number format with the pound-sign
* quoted, with a result such as: "$#31,45".
* <P>
* If a pattern is used, then unquoted braces in the pattern, if any,
* must match: that is, "ab {0} de" and "ab '}' de" are ok, but "ab
* {0'}' de" and "ab } de" are not.
* <p>
* <dl><dt><b>Warning:</b><dd>The rules for using quotes within message
* format patterns unfortunately have shown to be somewhat confusing.
* In particular, it isn't always obvious to localizers whether single
* quotes need to be doubled or not. Make sure to inform localizers about
* the rules, and tell them (for example, by using comments in resource
* bundle source files) which strings will be processed by MessageFormat.
* Note that localizers may need to use single quotes in translated
* strings where the original version doesn't have them.
* <br>Note also that the simplest way to avoid the problem is to
* use the real apostrophe (single quote) character U+2019 (') for
* human-readable text, and to use the ASCII apostrophe (U+0027 ' )
* only in program syntax, like quoting in MessageFormat.
* See the annotations for U+0027 Apostrophe in The Unicode Standard.</p>
* </dl>
* <P>
* The argument is a number from 0 to 9, which corresponds to the
* arguments presented in an array to be formatted.
* <P>
* It is ok to have unused arguments in the array. With missing
* arguments or arguments that are not of the right class for the
* specified format, a failing UErrorCode result is set.
* <P>
* <P>
* [Note:] As we see above, the string produced by a choice Format in
* MessageFormat is treated specially; occurances of '{' are used to
* indicated subformats.
* <P>
* [Note:] Formats are numbered by order of variable in the string.
* This is [not] the same as the argument numbering!
* <pre>
* \code
* For example: with "abc{2}def{3}ghi{0}...",
*
* format0 affects the first variable {2}
* format1 affects the second variable {3}
* format2 affects the second variable {0}
* \endcode
* </pre>
* and so on.
*/
/**
* 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_STABLE int32_t U_EXPORT2
u_formatMessage(const char *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_STABLE int32_t U_EXPORT2
u_vformatMessage( const char *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_STABLE void U_EXPORT2
u_parseMessage( const char *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_STABLE void U_EXPORT2
u_vparseMessage(const char *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_STABLE int32_t U_EXPORT2
u_formatMessageWithError( const char *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_STABLE int32_t U_EXPORT2
u_vformatMessageWithError( const char *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_STABLE void U_EXPORT2
u_parseMessageWithError(const char *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_STABLE void U_EXPORT2
u_vparseMessageWithError(const char *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
*/
typedef void* 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
* occured 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_STABLE UMessageFormat* U_EXPORT2
umsg_open( const UChar *pattern,
int32_t patternLength,
const char *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_STABLE void U_EXPORT2
umsg_close(UMessageFormat* format);
/**
* 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_STABLE 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_STABLE void U_EXPORT2
umsg_setLocale(UMessageFormat *fmt,
const char* 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_STABLE const char* 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_STABLE 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_STABLE 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_STABLE 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_STABLE 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_STABLE 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_STABLE 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_STABLE 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