mirror of https://github.com/lukechilds/node.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
402 lines
13 KiB
402 lines
13 KiB
// Copyright (C) 2016 and later: Unicode, Inc. and others.
|
|
// License & terms of use: http://www.unicode.org/copyright.html
|
|
/*
|
|
*******************************************************************************
|
|
* Copyright (C) 2015, International Business Machines
|
|
* Corporation and others. All Rights Reserved.
|
|
*******************************************************************************
|
|
* affixpatternparser.h
|
|
*
|
|
* created on: 2015jan06
|
|
* created by: Travis Keep
|
|
*/
|
|
|
|
#ifndef __AFFIX_PATTERN_PARSER_H__
|
|
#define __AFFIX_PATTERN_PARSER_H__
|
|
|
|
#include "unicode/utypes.h"
|
|
|
|
#if !UCONFIG_NO_FORMATTING
|
|
|
|
#include "unicode/unistr.h"
|
|
#include "unicode/uobject.h"
|
|
#include "pluralaffix.h"
|
|
|
|
U_NAMESPACE_BEGIN
|
|
|
|
class PluralRules;
|
|
class FixedPrecision;
|
|
class DecimalFormatSymbols;
|
|
|
|
/**
|
|
* A representation of the various forms of a particular currency according
|
|
* to some locale and usage context.
|
|
*
|
|
* Includes the symbol, ISO code form, and long form(s) of the currency name
|
|
* for each plural variation.
|
|
*/
|
|
class U_I18N_API CurrencyAffixInfo : public UMemory {
|
|
public:
|
|
/**
|
|
* Symbol is \u00a4; ISO form is \u00a4\u00a4;
|
|
* long form is \u00a4\u00a4\u00a4.
|
|
*/
|
|
CurrencyAffixInfo();
|
|
|
|
const UnicodeString &getSymbol() const { return fSymbol; }
|
|
const UnicodeString &getISO() const { return fISO; }
|
|
const PluralAffix &getLong() const { return fLong; }
|
|
void setSymbol(const UnicodeString &symbol) {
|
|
fSymbol = symbol;
|
|
fIsDefault = FALSE;
|
|
}
|
|
void setISO(const UnicodeString &iso) {
|
|
fISO = iso;
|
|
fIsDefault = FALSE;
|
|
}
|
|
UBool
|
|
equals(const CurrencyAffixInfo &other) const {
|
|
return (fSymbol == other.fSymbol)
|
|
&& (fISO == other.fISO)
|
|
&& (fLong.equals(other.fLong))
|
|
&& (fIsDefault == other.fIsDefault);
|
|
}
|
|
|
|
/**
|
|
* Intializes this instance.
|
|
*
|
|
* @param locale the locale for the currency forms.
|
|
* @param rules The plural rules for the locale.
|
|
* @param currency the null terminated, 3 character ISO code of the
|
|
* currency. If NULL, resets this instance as if it were just created.
|
|
* In this case, the first 2 parameters may be NULL as well.
|
|
* @param status any error returned here.
|
|
*/
|
|
void set(
|
|
const char *locale, const PluralRules *rules,
|
|
const UChar *currency, UErrorCode &status);
|
|
|
|
/**
|
|
* Returns true if this instance is the default. That is has no real
|
|
* currency. For instance never initialized with set()
|
|
* or reset with set(NULL, NULL, NULL, status).
|
|
*/
|
|
UBool isDefault() const { return fIsDefault; }
|
|
|
|
/**
|
|
* Adjusts the precision used for a particular currency.
|
|
* @param currency the null terminated, 3 character ISO code of the
|
|
* currency.
|
|
* @param usage the usage of the currency
|
|
* @param precision min/max fraction digits and rounding increment
|
|
* adjusted.
|
|
* @params status any error reported here.
|
|
*/
|
|
static void adjustPrecision(
|
|
const UChar *currency, const UCurrencyUsage usage,
|
|
FixedPrecision &precision, UErrorCode &status);
|
|
|
|
private:
|
|
/**
|
|
* The symbol form of the currency.
|
|
*/
|
|
UnicodeString fSymbol;
|
|
|
|
/**
|
|
* The ISO form of the currency, usually three letter abbreviation.
|
|
*/
|
|
UnicodeString fISO;
|
|
|
|
/**
|
|
* The long forms of the currency keyed by plural variation.
|
|
*/
|
|
PluralAffix fLong;
|
|
|
|
UBool fIsDefault;
|
|
|
|
};
|
|
|
|
class AffixPatternIterator;
|
|
|
|
/**
|
|
* A locale agnostic representation of an affix pattern.
|
|
*/
|
|
class U_I18N_API AffixPattern : public UMemory {
|
|
public:
|
|
|
|
/**
|
|
* The token types that can appear in an affix pattern.
|
|
*/
|
|
enum ETokenType {
|
|
kLiteral,
|
|
kPercent,
|
|
kPerMill,
|
|
kCurrency,
|
|
kNegative,
|
|
kPositive
|
|
};
|
|
|
|
/**
|
|
* An empty affix pattern.
|
|
*/
|
|
AffixPattern()
|
|
: tokens(), literals(), hasCurrencyToken(FALSE),
|
|
hasPercentToken(FALSE), hasPermillToken(FALSE), char32Count(0) {
|
|
}
|
|
|
|
/**
|
|
* Adds a string literal to this affix pattern.
|
|
*/
|
|
void addLiteral(const UChar *, int32_t start, int32_t len);
|
|
|
|
/**
|
|
* Adds a token to this affix pattern. t must not be kLiteral as
|
|
* the addLiteral() method adds literals.
|
|
* @param t the token type to add
|
|
*/
|
|
void add(ETokenType t);
|
|
|
|
/**
|
|
* Adds a currency token with specific count to this affix pattern.
|
|
* @param count the token count. Used to distinguish between
|
|
* one, two, or three currency symbols. Note that adding a currency
|
|
* token with count=2 (Use ISO code) is different than adding two
|
|
* currency tokens each with count=1 (two currency symbols).
|
|
*/
|
|
void addCurrency(uint8_t count);
|
|
|
|
/**
|
|
* Makes this instance be an empty affix pattern.
|
|
*/
|
|
void remove();
|
|
|
|
/**
|
|
* Provides an iterator over the tokens in this instance.
|
|
* @param result this is initialized to point just before the
|
|
* first token of this instance. Caller must call nextToken()
|
|
* on the iterator once it is set up to have it actually point
|
|
* to the first token. This first call to nextToken() will return
|
|
* FALSE if the AffixPattern being iterated over is empty.
|
|
* @return result
|
|
*/
|
|
AffixPatternIterator &iterator(AffixPatternIterator &result) const;
|
|
|
|
/**
|
|
* Returns TRUE if this instance has currency tokens in it.
|
|
*/
|
|
UBool usesCurrency() const {
|
|
return hasCurrencyToken;
|
|
}
|
|
|
|
UBool usesPercent() const {
|
|
return hasPercentToken;
|
|
}
|
|
|
|
UBool usesPermill() const {
|
|
return hasPermillToken;
|
|
}
|
|
|
|
/**
|
|
* Returns the number of code points a string of this instance
|
|
* would have if none of the special tokens were escaped.
|
|
* Used to compute the padding size.
|
|
*/
|
|
int32_t countChar32() const {
|
|
return char32Count;
|
|
}
|
|
|
|
/**
|
|
* Appends other to this instance mutating this instance in place.
|
|
* @param other The pattern appended to the end of this one.
|
|
* @return a reference to this instance for chaining.
|
|
*/
|
|
AffixPattern &append(const AffixPattern &other);
|
|
|
|
/**
|
|
* Converts this AffixPattern back into a user string.
|
|
* It is the inverse of parseUserAffixString.
|
|
*/
|
|
UnicodeString &toUserString(UnicodeString &appendTo) const;
|
|
|
|
/**
|
|
* Converts this AffixPattern back into a string.
|
|
* It is the inverse of parseAffixString.
|
|
*/
|
|
UnicodeString &toString(UnicodeString &appendTo) const;
|
|
|
|
/**
|
|
* Parses an affix pattern string appending it to an AffixPattern.
|
|
* Parses affix pattern strings produced from using
|
|
* DecimalFormatPatternParser to parse a format pattern. Affix patterns
|
|
* include the positive prefix and suffix and the negative prefix
|
|
* and suffix. This method expects affix patterns strings to be in the
|
|
* same format that DecimalFormatPatternParser produces. Namely special
|
|
* characters in the affix that correspond to a field type must be
|
|
* prefixed with an apostrophe ('). These special character sequences
|
|
* inluce minus (-), percent (%), permile (U+2030), plus (+),
|
|
* short currency (U+00a4), medium currency (u+00a4 * 2),
|
|
* long currency (u+a4 * 3), and apostrophe (')
|
|
* (apostrophe does not correspond to a field type but has to be escaped
|
|
* because it itself is the escape character).
|
|
* Since the expansion of these special character
|
|
* sequences is locale dependent, these sequences are not expanded in
|
|
* an AffixPattern instance.
|
|
* If these special characters are not prefixed with an apostrophe in
|
|
* the affix pattern string, then they are treated verbatim just as
|
|
* any other character. If an apostrophe prefixes a non special
|
|
* character in the affix pattern, the apostrophe is simply ignored.
|
|
*
|
|
* @param affixStr the string from DecimalFormatPatternParser
|
|
* @param appendTo parsed result appended here.
|
|
* @param status any error parsing returned here.
|
|
*/
|
|
static AffixPattern &parseAffixString(
|
|
const UnicodeString &affixStr,
|
|
AffixPattern &appendTo,
|
|
UErrorCode &status);
|
|
|
|
/**
|
|
* Parses an affix pattern string appending it to an AffixPattern.
|
|
* Parses affix pattern strings as the user would supply them.
|
|
* In this function, quoting makes special characters like normal
|
|
* characters whereas in parseAffixString, quoting makes special
|
|
* characters special.
|
|
*
|
|
* @param affixStr the string from the user
|
|
* @param appendTo parsed result appended here.
|
|
* @param status any error parsing returned here.
|
|
*/
|
|
static AffixPattern &parseUserAffixString(
|
|
const UnicodeString &affixStr,
|
|
AffixPattern &appendTo,
|
|
UErrorCode &status);
|
|
|
|
UBool equals(const AffixPattern &other) const {
|
|
return (tokens == other.tokens)
|
|
&& (literals == other.literals)
|
|
&& (hasCurrencyToken == other.hasCurrencyToken)
|
|
&& (hasPercentToken == other.hasPercentToken)
|
|
&& (hasPermillToken == other.hasPermillToken)
|
|
&& (char32Count == other.char32Count);
|
|
}
|
|
|
|
private:
|
|
/*
|
|
* Tokens stored here. Each UChar generally stands for one token. A
|
|
* Each token is of form 'etttttttllllllll' llllllll is the length of
|
|
* the token and ranges from 0-255. ttttttt is the token type and ranges
|
|
* from 0-127. If e is set it means this is an extendo token (to be
|
|
* described later). To accomodate token lengths above 255, each normal
|
|
* token (e=0) can be followed by 0 or more extendo tokens (e=1) with
|
|
* the same type. Right now only kLiteral Tokens have extendo tokens.
|
|
* Each extendo token provides the next 8 higher bits for the length.
|
|
* If a kLiteral token is followed by 2 extendo tokens then, then the
|
|
* llllllll of the next extendo token contains bits 8-15 of the length
|
|
* and the last extendo token contains bits 16-23 of the length.
|
|
*/
|
|
UnicodeString tokens;
|
|
|
|
/*
|
|
* The characters of the kLiteral tokens are concatenated together here.
|
|
* The first characters go with the first kLiteral token, the next
|
|
* characters go with the next kLiteral token etc.
|
|
*/
|
|
UnicodeString literals;
|
|
UBool hasCurrencyToken;
|
|
UBool hasPercentToken;
|
|
UBool hasPermillToken;
|
|
int32_t char32Count;
|
|
void add(ETokenType t, uint8_t count);
|
|
|
|
};
|
|
|
|
/**
|
|
* An iterator over the tokens in an AffixPattern instance.
|
|
*/
|
|
class U_I18N_API AffixPatternIterator : public UMemory {
|
|
public:
|
|
|
|
/**
|
|
* Using an iterator without first calling iterator on an AffixPattern
|
|
* instance to initialize the iterator results in
|
|
* undefined behavior.
|
|
*/
|
|
AffixPatternIterator() : nextLiteralIndex(0), lastLiteralLength(0), nextTokenIndex(0), tokens(NULL), literals(NULL) { }
|
|
/**
|
|
* Advances this iterator to the next token. Returns FALSE when there
|
|
* are no more tokens. Calling the other methods after nextToken()
|
|
* returns FALSE results in undefined behavior.
|
|
*/
|
|
UBool nextToken();
|
|
|
|
/**
|
|
* Returns the type of token.
|
|
*/
|
|
AffixPattern::ETokenType getTokenType() const;
|
|
|
|
/**
|
|
* For literal tokens, returns the literal string. Calling this for
|
|
* other token types results in undefined behavior.
|
|
* @param result replaced with a read-only alias to the literal string.
|
|
* @return result
|
|
*/
|
|
UnicodeString &getLiteral(UnicodeString &result) const;
|
|
|
|
/**
|
|
* Returns the token length. Usually 1, but for currency tokens may
|
|
* be 2 for ISO code and 3 for long form.
|
|
*/
|
|
int32_t getTokenLength() const;
|
|
private:
|
|
int32_t nextLiteralIndex;
|
|
int32_t lastLiteralLength;
|
|
int32_t nextTokenIndex;
|
|
const UnicodeString *tokens;
|
|
const UnicodeString *literals;
|
|
friend class AffixPattern;
|
|
AffixPatternIterator(const AffixPatternIterator &);
|
|
AffixPatternIterator &operator=(const AffixPatternIterator &);
|
|
};
|
|
|
|
/**
|
|
* A locale aware class that converts locale independent AffixPattern
|
|
* instances into locale dependent PluralAffix instances.
|
|
*/
|
|
class U_I18N_API AffixPatternParser : public UMemory {
|
|
public:
|
|
AffixPatternParser();
|
|
AffixPatternParser(const DecimalFormatSymbols &symbols);
|
|
void setDecimalFormatSymbols(const DecimalFormatSymbols &symbols);
|
|
|
|
/**
|
|
* Parses affixPattern appending the result to appendTo.
|
|
* @param affixPattern The affix pattern.
|
|
* @param currencyAffixInfo contains the currency forms.
|
|
* @param appendTo The result of parsing affixPattern is appended here.
|
|
* @param status any error returned here.
|
|
* @return appendTo.
|
|
*/
|
|
PluralAffix &parse(
|
|
const AffixPattern &affixPattern,
|
|
const CurrencyAffixInfo ¤cyAffixInfo,
|
|
PluralAffix &appendTo,
|
|
UErrorCode &status) const;
|
|
|
|
UBool equals(const AffixPatternParser &other) const {
|
|
return (fPercent == other.fPercent)
|
|
&& (fPermill == other.fPermill)
|
|
&& (fNegative == other.fNegative)
|
|
&& (fPositive == other.fPositive);
|
|
}
|
|
|
|
private:
|
|
UnicodeString fPercent;
|
|
UnicodeString fPermill;
|
|
UnicodeString fNegative;
|
|
UnicodeString fPositive;
|
|
};
|
|
|
|
|
|
U_NAMESPACE_END
|
|
#endif /* #if !UCONFIG_NO_FORMATTING */
|
|
#endif // __AFFIX_PATTERN_PARSER_H__
|
|
|