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Diffstat (limited to 'intl/icu/source/i18n/unicode/fieldpos.h')
| -rw-r--r-- | intl/icu/source/i18n/unicode/fieldpos.h | 298 |
1 files changed, 298 insertions, 0 deletions
diff --git a/intl/icu/source/i18n/unicode/fieldpos.h b/intl/icu/source/i18n/unicode/fieldpos.h new file mode 100644 index 0000000000..0c092a0052 --- /dev/null +++ b/intl/icu/source/i18n/unicode/fieldpos.h @@ -0,0 +1,298 @@ +// © 2016 and later: Unicode, Inc. and others. +// License & terms of use: http://www.unicode.org/copyright.html +/* + ******************************************************************************** + * Copyright (C) 1997-2006, International Business Machines + * Corporation and others. All Rights Reserved. + ******************************************************************************** + * + * File FIELDPOS.H + * + * Modification History: + * + * Date Name Description + * 02/25/97 aliu Converted from java. + * 03/17/97 clhuang Updated per Format implementation. + * 07/17/98 stephen Added default/copy ctors, and operators =, ==, != + ******************************************************************************** + */ + +// ***************************************************************************** +// This file was generated from the java source file FieldPosition.java +// ***************************************************************************** + +#ifndef FIELDPOS_H +#define FIELDPOS_H + +#include "unicode/utypes.h" + +#if U_SHOW_CPLUSPLUS_API + +/** + * \file + * \brief C++ API: FieldPosition identifies the fields in a formatted output. + */ + +#if !UCONFIG_NO_FORMATTING + +#include "unicode/uobject.h" + +U_NAMESPACE_BEGIN + +/** + * <code>FieldPosition</code> is a simple class used by <code>Format</code> + * and its subclasses to identify fields in formatted output. Fields are + * identified by constants, whose names typically end with <code>_FIELD</code>, + * defined in the various subclasses of <code>Format</code>. See + * <code>ERA_FIELD</code> and its friends in <code>DateFormat</code> for + * an example. + * + * <p> + * <code>FieldPosition</code> keeps track of the position of the + * field within the formatted output with two indices: the index + * of the first character of the field and the index of the last + * character of the field. + * + * <p> + * One version of the <code>format</code> method in the various + * <code>Format</code> classes requires a <code>FieldPosition</code> + * object as an argument. You use this <code>format</code> method + * to perform partial formatting or to get information about the + * formatted output (such as the position of a field). + * + * The FieldPosition class is not intended for public subclassing. + * + * <p> + * Below is an example of using <code>FieldPosition</code> to aid + * alignment of an array of formatted floating-point numbers on + * their decimal points: + * <pre> + * \code + * double doubleNum[] = {123456789.0, -12345678.9, 1234567.89, -123456.789, + * 12345.6789, -1234.56789, 123.456789, -12.3456789, 1.23456789}; + * int dNumSize = (int)(sizeof(doubleNum)/sizeof(double)); + * + * UErrorCode status = U_ZERO_ERROR; + * DecimalFormat* fmt = (DecimalFormat*) NumberFormat::createInstance(status); + * fmt->setDecimalSeparatorAlwaysShown(true); + * + * const int tempLen = 20; + * char temp[tempLen]; + * + * for (int i=0; i<dNumSize; i++) { + * FieldPosition pos(NumberFormat::INTEGER_FIELD); + * UnicodeString buf; + * char fmtText[tempLen]; + * ToCharString(fmt->format(doubleNum[i], buf, pos), fmtText); + * for (int j=0; j<tempLen; j++) temp[j] = ' '; // clear with spaces + * temp[__min(tempLen, tempLen-pos.getEndIndex())] = '\0'; + * cout << temp << fmtText << endl; + * } + * delete fmt; + * \endcode + * </pre> + * <p> + * The code will generate the following output: + * <pre> + * \code + * 123,456,789.000 + * -12,345,678.900 + * 1,234,567.880 + * -123,456.789 + * 12,345.678 + * -1,234.567 + * 123.456 + * -12.345 + * 1.234 + * \endcode + * </pre> + */ +class U_I18N_API FieldPosition : public UObject { +public: + /** + * DONT_CARE may be specified as the field to indicate that the + * caller doesn't need to specify a field. + * @stable ICU 2.0 + */ + enum { DONT_CARE = -1 }; + + /** + * Creates a FieldPosition object with a non-specified field. + * @stable ICU 2.0 + */ + FieldPosition() + : UObject(), fField(DONT_CARE), fBeginIndex(0), fEndIndex(0) {} + + /** + * Creates a FieldPosition object for the given field. Fields are + * identified by constants, whose names typically end with _FIELD, + * in the various subclasses of Format. + * + * @see NumberFormat#INTEGER_FIELD + * @see NumberFormat#FRACTION_FIELD + * @see DateFormat#YEAR_FIELD + * @see DateFormat#MONTH_FIELD + * @stable ICU 2.0 + */ + FieldPosition(int32_t field) + : UObject(), fField(field), fBeginIndex(0), fEndIndex(0) {} + + /** + * Copy constructor + * @param copy the object to be copied from. + * @stable ICU 2.0 + */ + FieldPosition(const FieldPosition& copy) + : UObject(copy), fField(copy.fField), fBeginIndex(copy.fBeginIndex), fEndIndex(copy.fEndIndex) {} + + /** + * Destructor + * @stable ICU 2.0 + */ + virtual ~FieldPosition(); + + /** + * Assignment operator + * @param copy the object to be copied from. + * @stable ICU 2.0 + */ + FieldPosition& operator=(const FieldPosition& copy); + + /** + * Equality operator. + * @param that the object to be compared with. + * @return true if the two field positions are equal, false otherwise. + * @stable ICU 2.0 + */ + bool operator==(const FieldPosition& that) const; + + /** + * Equality operator. + * @param that the object to be compared with. + * @return true if the two field positions are not equal, false otherwise. + * @stable ICU 2.0 + */ + bool operator!=(const FieldPosition& that) const; + + /** + * Clone this object. + * Clones can be used concurrently in multiple threads. + * If an error occurs, then nullptr is returned. + * The caller must delete the clone. + * + * @return a clone of this object + * + * @see getDynamicClassID + * @stable ICU 2.8 + */ + FieldPosition *clone() const; + + /** + * Retrieve the field identifier. + * @return the field identifier. + * @stable ICU 2.0 + */ + int32_t getField(void) const { return fField; } + + /** + * Retrieve the index of the first character in the requested field. + * @return the index of the first character in the requested field. + * @stable ICU 2.0 + */ + int32_t getBeginIndex(void) const { return fBeginIndex; } + + /** + * Retrieve the index of the character following the last character in the + * requested field. + * @return the index of the character following the last character in the + * requested field. + * @stable ICU 2.0 + */ + int32_t getEndIndex(void) const { return fEndIndex; } + + /** + * Set the field. + * @param f the new value of the field. + * @stable ICU 2.0 + */ + void setField(int32_t f) { fField = f; } + + /** + * Set the begin index. For use by subclasses of Format. + * @param bi the new value of the begin index + * @stable ICU 2.0 + */ + void setBeginIndex(int32_t bi) { fBeginIndex = bi; } + + /** + * Set the end index. For use by subclasses of Format. + * @param ei the new value of the end index + * @stable ICU 2.0 + */ + void setEndIndex(int32_t ei) { fEndIndex = ei; } + + /** + * ICU "poor man's RTTI", returns a UClassID for the actual class. + * + * @stable ICU 2.2 + */ + virtual UClassID getDynamicClassID() const override; + + /** + * ICU "poor man's RTTI", returns a UClassID for this class. + * + * @stable ICU 2.2 + */ + static UClassID U_EXPORT2 getStaticClassID(); + +private: + /** + * Input: Desired field to determine start and end offsets for. + * The meaning depends on the subclass of Format. + */ + int32_t fField; + + /** + * Output: Start offset of field in text. + * If the field does not occur in the text, 0 is returned. + */ + int32_t fBeginIndex; + + /** + * Output: End offset of field in text. + * If the field does not occur in the text, 0 is returned. + */ + int32_t fEndIndex; +}; + +inline FieldPosition& +FieldPosition::operator=(const FieldPosition& copy) +{ + fField = copy.fField; + fEndIndex = copy.fEndIndex; + fBeginIndex = copy.fBeginIndex; + return *this; +} + +inline bool +FieldPosition::operator==(const FieldPosition& copy) const +{ + return (fField == copy.fField && + fEndIndex == copy.fEndIndex && + fBeginIndex == copy.fBeginIndex); +} + +inline bool +FieldPosition::operator!=(const FieldPosition& copy) const +{ + return !operator==(copy); +} + +U_NAMESPACE_END + +#endif /* #if !UCONFIG_NO_FORMATTING */ + +#endif /* U_SHOW_CPLUSPLUS_API */ + +#endif // _FIELDPOS +//eof |