578 lines
18 KiB
C++
578 lines
18 KiB
C++
// © 2016 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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/*
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*******************************************************************************
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* Copyright (C) 1997-2013, International Business Machines Corporation and *
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* others. All Rights Reserved. *
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*******************************************************************************
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*
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* File CHOICFMT.CPP
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*
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* Modification History:
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*
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* Date Name Description
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* 02/19/97 aliu Converted from java.
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* 03/20/97 helena Finished first cut of implementation and got rid
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* of nextDouble/previousDouble and replaced with
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* boolean array.
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* 4/10/97 aliu Clean up. Modified to work on AIX.
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* 06/04/97 helena Fixed applyPattern(), toPattern() and not to include
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* wchar.h.
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* 07/09/97 helena Made ParsePosition into a class.
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* 08/06/97 nos removed overloaded constructor, fixed 'format(array)'
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* 07/22/98 stephen JDK 1.2 Sync - removed UBool array (doubleFlags)
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* 02/22/99 stephen Removed character literals for EBCDIC safety
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********************************************************************************
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*/
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#include "unicode/utypes.h"
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#if !UCONFIG_NO_FORMATTING
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#include "unicode/choicfmt.h"
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#include "unicode/numfmt.h"
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#include "unicode/locid.h"
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#include "cpputils.h"
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#include "cstring.h"
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#include "messageimpl.h"
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#include "putilimp.h"
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#include "uassert.h"
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#include <stdio.h>
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#include <float.h>
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// *****************************************************************************
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// class ChoiceFormat
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// *****************************************************************************
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U_NAMESPACE_BEGIN
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UOBJECT_DEFINE_RTTI_IMPLEMENTATION(ChoiceFormat)
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// Special characters used by ChoiceFormat. There are two characters
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// used interchangeably to indicate <=. Either is parsed, but only
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// LESS_EQUAL is generated by toPattern().
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#define SINGLE_QUOTE ((UChar)0x0027) /*'*/
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#define LESS_THAN ((UChar)0x003C) /*<*/
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#define LESS_EQUAL ((UChar)0x0023) /*#*/
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#define LESS_EQUAL2 ((UChar)0x2264)
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#define VERTICAL_BAR ((UChar)0x007C) /*|*/
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#define MINUS ((UChar)0x002D) /*-*/
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static const UChar LEFT_CURLY_BRACE = 0x7B; /*{*/
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static const UChar RIGHT_CURLY_BRACE = 0x7D; /*}*/
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#ifdef INFINITY
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#undef INFINITY
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#endif
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#define INFINITY ((UChar)0x221E)
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//static const UChar gPositiveInfinity[] = {INFINITY, 0};
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//static const UChar gNegativeInfinity[] = {MINUS, INFINITY, 0};
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#define POSITIVE_INF_STRLEN 1
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#define NEGATIVE_INF_STRLEN 2
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// -------------------------------------
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// Creates a ChoiceFormat instance based on the pattern.
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ChoiceFormat::ChoiceFormat(const UnicodeString& newPattern,
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UErrorCode& status)
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: constructorErrorCode(status),
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msgPattern(status)
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{
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applyPattern(newPattern, status);
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}
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// -------------------------------------
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// Creates a ChoiceFormat instance with the limit array and
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// format strings for each limit.
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ChoiceFormat::ChoiceFormat(const double* limits,
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const UnicodeString* formats,
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int32_t cnt )
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: constructorErrorCode(U_ZERO_ERROR),
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msgPattern(constructorErrorCode)
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{
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setChoices(limits, NULL, formats, cnt, constructorErrorCode);
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}
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// -------------------------------------
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ChoiceFormat::ChoiceFormat(const double* limits,
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const UBool* closures,
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const UnicodeString* formats,
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int32_t cnt )
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: constructorErrorCode(U_ZERO_ERROR),
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msgPattern(constructorErrorCode)
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{
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setChoices(limits, closures, formats, cnt, constructorErrorCode);
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}
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// -------------------------------------
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// copy constructor
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ChoiceFormat::ChoiceFormat(const ChoiceFormat& that)
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: NumberFormat(that),
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constructorErrorCode(that.constructorErrorCode),
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msgPattern(that.msgPattern)
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{
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}
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// -------------------------------------
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// Private constructor that creates a
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// ChoiceFormat instance based on the
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// pattern and populates UParseError
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ChoiceFormat::ChoiceFormat(const UnicodeString& newPattern,
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UParseError& parseError,
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UErrorCode& status)
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: constructorErrorCode(status),
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msgPattern(status)
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{
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applyPattern(newPattern,parseError, status);
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}
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// -------------------------------------
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bool
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ChoiceFormat::operator==(const Format& that) const
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{
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if (this == &that) return true;
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if (!NumberFormat::operator==(that)) return false;
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ChoiceFormat& thatAlias = (ChoiceFormat&)that;
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return msgPattern == thatAlias.msgPattern;
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}
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// -------------------------------------
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// copy constructor
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const ChoiceFormat&
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ChoiceFormat::operator=(const ChoiceFormat& that)
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{
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if (this != &that) {
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NumberFormat::operator=(that);
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constructorErrorCode = that.constructorErrorCode;
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msgPattern = that.msgPattern;
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}
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return *this;
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}
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// -------------------------------------
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ChoiceFormat::~ChoiceFormat()
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{
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}
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// -------------------------------------
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/**
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* Convert a double value to a string without the overhead of NumberFormat.
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*/
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UnicodeString&
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ChoiceFormat::dtos(double value,
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UnicodeString& string)
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{
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/* Buffer to contain the digits and any extra formatting stuff. */
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char temp[DBL_DIG + 16];
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char *itrPtr = temp;
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char *expPtr;
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sprintf(temp, "%.*g", DBL_DIG, value);
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/* Find and convert the decimal point.
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Using setlocale on some machines will cause sprintf to use a comma for certain locales.
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*/
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while (*itrPtr && (*itrPtr == '-' || isdigit(*itrPtr))) {
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itrPtr++;
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}
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if (*itrPtr != 0 && *itrPtr != 'e') {
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/* We reached something that looks like a decimal point.
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In case someone used setlocale(), which changes the decimal point. */
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*itrPtr = '.';
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itrPtr++;
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}
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/* Search for the exponent */
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while (*itrPtr && *itrPtr != 'e') {
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itrPtr++;
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}
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if (*itrPtr == 'e') {
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itrPtr++;
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/* Verify the exponent sign */
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if (*itrPtr == '+' || *itrPtr == '-') {
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itrPtr++;
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}
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/* Remove leading zeros. You will see this on Windows machines. */
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expPtr = itrPtr;
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while (*itrPtr == '0') {
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itrPtr++;
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}
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if (*itrPtr && expPtr != itrPtr) {
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/* Shift the exponent without zeros. */
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while (*itrPtr) {
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*(expPtr++) = *(itrPtr++);
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}
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// NULL terminate
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*expPtr = 0;
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}
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}
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string = UnicodeString(temp, -1, US_INV); /* invariant codepage */
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return string;
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}
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// -------------------------------------
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// calls the overloaded applyPattern method.
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void
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ChoiceFormat::applyPattern(const UnicodeString& pattern,
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UErrorCode& status)
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{
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msgPattern.parseChoiceStyle(pattern, NULL, status);
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constructorErrorCode = status;
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}
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// -------------------------------------
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// Applies the pattern to this ChoiceFormat instance.
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void
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ChoiceFormat::applyPattern(const UnicodeString& pattern,
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UParseError& parseError,
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UErrorCode& status)
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{
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msgPattern.parseChoiceStyle(pattern, &parseError, status);
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constructorErrorCode = status;
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}
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// -------------------------------------
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// Returns the input pattern string.
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UnicodeString&
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ChoiceFormat::toPattern(UnicodeString& result) const
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{
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return result = msgPattern.getPatternString();
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}
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// -------------------------------------
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// Sets the limit and format arrays.
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void
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ChoiceFormat::setChoices( const double* limits,
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const UnicodeString* formats,
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int32_t cnt )
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{
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UErrorCode errorCode = U_ZERO_ERROR;
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setChoices(limits, NULL, formats, cnt, errorCode);
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}
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// -------------------------------------
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// Sets the limit and format arrays.
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void
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ChoiceFormat::setChoices( const double* limits,
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const UBool* closures,
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const UnicodeString* formats,
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int32_t cnt )
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{
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UErrorCode errorCode = U_ZERO_ERROR;
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setChoices(limits, closures, formats, cnt, errorCode);
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}
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void
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ChoiceFormat::setChoices(const double* limits,
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const UBool* closures,
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const UnicodeString* formats,
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int32_t count,
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UErrorCode &errorCode) {
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if (U_FAILURE(errorCode)) {
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return;
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}
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if (limits == NULL || formats == NULL) {
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errorCode = U_ILLEGAL_ARGUMENT_ERROR;
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return;
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}
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// Reconstruct the original input pattern.
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// Modified version of the pre-ICU 4.8 toPattern() implementation.
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UnicodeString result;
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for (int32_t i = 0; i < count; ++i) {
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if (i != 0) {
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result += VERTICAL_BAR;
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}
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UnicodeString buf;
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if (uprv_isPositiveInfinity(limits[i])) {
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result += INFINITY;
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} else if (uprv_isNegativeInfinity(limits[i])) {
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result += MINUS;
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result += INFINITY;
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} else {
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result += dtos(limits[i], buf);
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}
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if (closures != NULL && closures[i]) {
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result += LESS_THAN;
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} else {
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result += LESS_EQUAL;
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}
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// Append formats[i], using quotes if there are special
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// characters. Single quotes themselves must be escaped in
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// either case.
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const UnicodeString& text = formats[i];
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int32_t textLength = text.length();
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int32_t nestingLevel = 0;
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for (int32_t j = 0; j < textLength; ++j) {
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UChar c = text[j];
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if (c == SINGLE_QUOTE && nestingLevel == 0) {
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// Double each top-level apostrophe.
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result.append(c);
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} else if (c == VERTICAL_BAR && nestingLevel == 0) {
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// Surround each pipe symbol with apostrophes for quoting.
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// If the next character is an apostrophe, then that will be doubled,
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// and although the parser will see the apostrophe pairs beginning
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// and ending one character earlier than our doubling, the result
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// is as desired.
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// | -> '|'
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// |' -> '|'''
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// |'' -> '|''''' etc.
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result.append(SINGLE_QUOTE).append(c).append(SINGLE_QUOTE);
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continue; // Skip the append(c) at the end of the loop body.
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} else if (c == LEFT_CURLY_BRACE) {
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++nestingLevel;
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} else if (c == RIGHT_CURLY_BRACE && nestingLevel > 0) {
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--nestingLevel;
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}
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result.append(c);
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}
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}
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// Apply the reconstructed pattern.
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applyPattern(result, errorCode);
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}
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// -------------------------------------
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// Gets the limit array.
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const double*
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ChoiceFormat::getLimits(int32_t& cnt) const
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{
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cnt = 0;
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return NULL;
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}
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// -------------------------------------
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// Gets the closures array.
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const UBool*
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ChoiceFormat::getClosures(int32_t& cnt) const
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{
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cnt = 0;
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return NULL;
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}
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// -------------------------------------
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// Gets the format array.
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const UnicodeString*
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ChoiceFormat::getFormats(int32_t& cnt) const
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{
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cnt = 0;
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return NULL;
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}
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// -------------------------------------
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// Formats an int64 number, it's actually formatted as
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// a double. The returned format string may differ
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// from the input number because of this.
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UnicodeString&
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ChoiceFormat::format(int64_t number,
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UnicodeString& appendTo,
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FieldPosition& status) const
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{
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return format((double) number, appendTo, status);
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}
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// -------------------------------------
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// Formats an int32_t number, it's actually formatted as
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// a double.
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UnicodeString&
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ChoiceFormat::format(int32_t number,
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UnicodeString& appendTo,
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FieldPosition& status) const
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{
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return format((double) number, appendTo, status);
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}
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// -------------------------------------
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// Formats a double number.
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UnicodeString&
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ChoiceFormat::format(double number,
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UnicodeString& appendTo,
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FieldPosition& /*pos*/) const
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{
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if (msgPattern.countParts() == 0) {
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// No pattern was applied, or it failed.
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return appendTo;
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}
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// Get the appropriate sub-message.
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int32_t msgStart = findSubMessage(msgPattern, 0, number);
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if (!MessageImpl::jdkAposMode(msgPattern)) {
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int32_t patternStart = msgPattern.getPart(msgStart).getLimit();
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int32_t msgLimit = msgPattern.getLimitPartIndex(msgStart);
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appendTo.append(msgPattern.getPatternString(),
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patternStart,
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msgPattern.getPatternIndex(msgLimit) - patternStart);
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return appendTo;
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}
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// JDK compatibility mode: Remove SKIP_SYNTAX.
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return MessageImpl::appendSubMessageWithoutSkipSyntax(msgPattern, msgStart, appendTo);
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}
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int32_t
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ChoiceFormat::findSubMessage(const MessagePattern &pattern, int32_t partIndex, double number) {
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int32_t count = pattern.countParts();
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int32_t msgStart;
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// Iterate over (ARG_INT|DOUBLE, ARG_SELECTOR, message) tuples
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// until ARG_LIMIT or end of choice-only pattern.
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// Ignore the first number and selector and start the loop on the first message.
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partIndex += 2;
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for (;;) {
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// Skip but remember the current sub-message.
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msgStart = partIndex;
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partIndex = pattern.getLimitPartIndex(partIndex);
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if (++partIndex >= count) {
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// Reached the end of the choice-only pattern.
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// Return with the last sub-message.
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break;
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}
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const MessagePattern::Part &part = pattern.getPart(partIndex++);
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UMessagePatternPartType type = part.getType();
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if (type == UMSGPAT_PART_TYPE_ARG_LIMIT) {
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// Reached the end of the ChoiceFormat style.
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// Return with the last sub-message.
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break;
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}
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// part is an ARG_INT or ARG_DOUBLE
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U_ASSERT(MessagePattern::Part::hasNumericValue(type));
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double boundary = pattern.getNumericValue(part);
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// Fetch the ARG_SELECTOR character.
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int32_t selectorIndex = pattern.getPatternIndex(partIndex++);
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UChar boundaryChar = pattern.getPatternString().charAt(selectorIndex);
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if (boundaryChar == LESS_THAN ? !(number > boundary) : !(number >= boundary)) {
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// The number is in the interval between the previous boundary and the current one.
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// Return with the sub-message between them.
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// The !(a>b) and !(a>=b) comparisons are equivalent to
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// (a<=b) and (a<b) except they "catch" NaN.
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break;
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}
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}
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return msgStart;
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}
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// -------------------------------------
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// Formats an array of objects. Checks if the data type of the objects
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// to get the right value for formatting.
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UnicodeString&
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ChoiceFormat::format(const Formattable* objs,
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int32_t cnt,
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UnicodeString& appendTo,
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FieldPosition& pos,
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UErrorCode& status) const
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{
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if(cnt < 0) {
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status = U_ILLEGAL_ARGUMENT_ERROR;
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return appendTo;
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}
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if (msgPattern.countParts() == 0) {
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status = U_INVALID_STATE_ERROR;
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return appendTo;
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}
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for (int32_t i = 0; i < cnt; i++) {
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double objDouble = objs[i].getDouble(status);
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if (U_SUCCESS(status)) {
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format(objDouble, appendTo, pos);
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}
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}
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return appendTo;
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}
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// -------------------------------------
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void
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ChoiceFormat::parse(const UnicodeString& text,
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Formattable& result,
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ParsePosition& pos) const
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{
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result.setDouble(parseArgument(msgPattern, 0, text, pos));
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}
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double
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ChoiceFormat::parseArgument(
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const MessagePattern &pattern, int32_t partIndex,
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const UnicodeString &source, ParsePosition &pos) {
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// find the best number (defined as the one with the longest parse)
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int32_t start = pos.getIndex();
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int32_t furthest = start;
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double bestNumber = uprv_getNaN();
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double tempNumber = 0.0;
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int32_t count = pattern.countParts();
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while (partIndex < count && pattern.getPartType(partIndex) != UMSGPAT_PART_TYPE_ARG_LIMIT) {
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tempNumber = pattern.getNumericValue(pattern.getPart(partIndex));
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partIndex += 2; // skip the numeric part and ignore the ARG_SELECTOR
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int32_t msgLimit = pattern.getLimitPartIndex(partIndex);
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int32_t len = matchStringUntilLimitPart(pattern, partIndex, msgLimit, source, start);
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if (len >= 0) {
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int32_t newIndex = start + len;
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if (newIndex > furthest) {
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furthest = newIndex;
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bestNumber = tempNumber;
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if (furthest == source.length()) {
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break;
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}
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}
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}
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partIndex = msgLimit + 1;
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}
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if (furthest == start) {
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pos.setErrorIndex(start);
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} else {
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pos.setIndex(furthest);
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}
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return bestNumber;
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}
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int32_t
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ChoiceFormat::matchStringUntilLimitPart(
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const MessagePattern &pattern, int32_t partIndex, int32_t limitPartIndex,
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const UnicodeString &source, int32_t sourceOffset) {
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int32_t matchingSourceLength = 0;
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const UnicodeString &msgString = pattern.getPatternString();
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int32_t prevIndex = pattern.getPart(partIndex).getLimit();
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for (;;) {
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const MessagePattern::Part &part = pattern.getPart(++partIndex);
|
|
if (partIndex == limitPartIndex || part.getType() == UMSGPAT_PART_TYPE_SKIP_SYNTAX) {
|
|
int32_t index = part.getIndex();
|
|
int32_t length = index - prevIndex;
|
|
if (length != 0 && 0 != source.compare(sourceOffset, length, msgString, prevIndex, length)) {
|
|
return -1; // mismatch
|
|
}
|
|
matchingSourceLength += length;
|
|
if (partIndex == limitPartIndex) {
|
|
return matchingSourceLength;
|
|
}
|
|
prevIndex = part.getLimit(); // SKIP_SYNTAX
|
|
}
|
|
}
|
|
}
|
|
|
|
// -------------------------------------
|
|
|
|
ChoiceFormat*
|
|
ChoiceFormat::clone() const
|
|
{
|
|
ChoiceFormat *aCopy = new ChoiceFormat(*this);
|
|
return aCopy;
|
|
}
|
|
|
|
U_NAMESPACE_END
|
|
|
|
#endif /* #if !UCONFIG_NO_FORMATTING */
|
|
|
|
//eof
|