| /* |
| ******************************************************************************* |
| * Copyright © {1996-1999}, International Business Machines Corporation and others. All Rights Reserved. |
| ******************************************************************************* |
| */ |
| |
| #ifndef UMSG_H |
| #define UMSG_H |
| |
| #include "unicode/utypes.h" |
| #include <stdarg.h> |
| /** |
| * @name Message Format C API |
| * |
| * 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> |
| * . UChar *result, *tzID, *str; |
| * . UChar pattern[100]; |
| * . t_int32 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 |
| * </pre> |
| * Typically, the message format will come from resources, and the |
| * arguments will be dynamically set at runtime. |
| * <P> |
| * Example 2: |
| * <pre> |
| * . UChar* str; |
| * . UErrorCode status = U_ZERO_ERROR; |
| * . UChar *result; |
| * . UChar pattern[100]; |
| * . t_int32 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. |
| * </pre> |
| * |
| * The pattern is of the following form. Legend: |
| * <pre> |
| * . {optional item} |
| * . (group that may be repeated)* |
| * </pre> |
| * Do not confuse optional items with items inside quotes braces, such |
| * as this: "{". Quoted braces are literals. |
| * <pre> |
| * . 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 |
| * </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> |
| * 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> |
| * . 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} |
| * </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 |
| */ |
| U_CAPI int32_t |
| u_formatMessage( const char *locale, |
| const UChar *pattern, |
| int32_t patternLength, |
| UChar *result, |
| int32_t resultLength, |
| 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 \Ref{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 |
| */ |
| U_CAPI void |
| u_parseMessage( const char *locale, |
| const UChar *pattern, |
| int32_t patternLength, |
| const UChar *source, |
| int32_t sourceLength, |
| UErrorCode *status, |
| ...); |
| |
| #endif |
