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