/src/icu/source/i18n/number_affixutils.cpp

Source (jump to first uncovered line)
// © 2017 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html

#include "unicode/utypes.h"

#if !UCONFIG_NO_FORMATTING

#include "number_affixutils.h"
#include "unicode/utf16.h"
#include "unicode/uniset.h"

using namespace icu;
using namespace icu::number;
using namespace icu::number::impl;

TokenConsumer::~TokenConsumer() = default;
SymbolProvider::~SymbolProvider() = default;

int32_t AffixUtils::estimateLength(const UnicodeString &patternString, UErrorCode &status) {
    AffixPatternState state = STATE_BASE;
    int32_t offset = 0;
    int32_t length = 0;
    for (; offset < patternString.length();) {
        UChar32 cp = patternString.char32At(offset);

        switch (state) {
            case STATE_BASE:
                if (cp == u'\'') {
                    // First quote
                    state = STATE_FIRST_QUOTE;
                } else {
                    // Unquoted symbol
                    length++;
                }
                break;
            case STATE_FIRST_QUOTE:
                if (cp == u'\'') {
                    // Repeated quote
                    length++;
                    state = STATE_BASE;
                } else {
                    // Quoted code point
                    length++;
                    state = STATE_INSIDE_QUOTE;
                }
                break;
            case STATE_INSIDE_QUOTE:
                if (cp == u'\'') {
                    // End of quoted sequence
                    state = STATE_AFTER_QUOTE;
                } else {
                    // Quoted code point
                    length++;
                }
                break;
            case STATE_AFTER_QUOTE:
                if (cp == u'\'') {
                    // Double quote inside of quoted sequence
                    length++;
                    state = STATE_INSIDE_QUOTE;
                } else {
                    // Unquoted symbol
                    length++;
                }
                break;
            default:
                UPRV_UNREACHABLE;
        }

        offset += U16_LENGTH(cp);
    }

    switch (state) {
        case STATE_FIRST_QUOTE:
        case STATE_INSIDE_QUOTE:
            status = U_ILLEGAL_ARGUMENT_ERROR;
            break;
        default:
            break;
    }

    return length;
}

UnicodeString AffixUtils::escape(const UnicodeString &input) {
    AffixPatternState state = STATE_BASE;
    int32_t offset = 0;
    UnicodeString output;
    for (; offset < input.length();) {
        UChar32 cp = input.char32At(offset);

        switch (cp) {
            case u'\'':
                output.append(u"''", -1);
                break;

            case u'-':
            case u'+':
            case u'%':
            case u'‰':
            case u'¤':
                if (state == STATE_BASE) {
                    output.append(u'\'');
                    output.append(cp);
                    state = STATE_INSIDE_QUOTE;
                } else {
                    output.append(cp);
                }
                break;

            default:
                if (state == STATE_INSIDE_QUOTE) {
                    output.append(u'\'');
                    output.append(cp);
                    state = STATE_BASE;
                } else {
                    output.append(cp);
                }
                break;
        }
        offset += U16_LENGTH(cp);
    }

    if (state == STATE_INSIDE_QUOTE) {
        output.append(u'\'');
    }

    return output;
}

Field AffixUtils::getFieldForType(AffixPatternType type) {
    switch (type) {
        case TYPE_MINUS_SIGN:
            return {UFIELD_CATEGORY_NUMBER, UNUM_SIGN_FIELD};
        case TYPE_PLUS_SIGN:
            return {UFIELD_CATEGORY_NUMBER, UNUM_SIGN_FIELD};
        case TYPE_APPROXIMATELY_SIGN:
            // TODO: Introduce a new field for the approximately sign?
            return {UFIELD_CATEGORY_NUMBER, UNUM_SIGN_FIELD};
        case TYPE_PERCENT:
            return {UFIELD_CATEGORY_NUMBER, UNUM_PERCENT_FIELD};
        case TYPE_PERMILLE:
            return {UFIELD_CATEGORY_NUMBER, UNUM_PERMILL_FIELD};
        case TYPE_CURRENCY_SINGLE:
            return {UFIELD_CATEGORY_NUMBER, UNUM_CURRENCY_FIELD};
        case TYPE_CURRENCY_DOUBLE:
            return {UFIELD_CATEGORY_NUMBER, UNUM_CURRENCY_FIELD};
        case TYPE_CURRENCY_TRIPLE:
            return {UFIELD_CATEGORY_NUMBER, UNUM_CURRENCY_FIELD};
        case TYPE_CURRENCY_QUAD:
            return {UFIELD_CATEGORY_NUMBER, UNUM_CURRENCY_FIELD};
        case TYPE_CURRENCY_QUINT:
            return {UFIELD_CATEGORY_NUMBER, UNUM_CURRENCY_FIELD};
        case TYPE_CURRENCY_OVERFLOW:
            return {UFIELD_CATEGORY_NUMBER, UNUM_CURRENCY_FIELD};
        default:
            UPRV_UNREACHABLE;
    }
}

int32_t
AffixUtils::unescape(const UnicodeString &affixPattern, FormattedStringBuilder &output, int32_t position,
                     const SymbolProvider &provider, Field field, UErrorCode &status) {
    int32_t length = 0;
    AffixTag tag;
    while (hasNext(tag, affixPattern)) {
        tag = nextToken(tag, affixPattern, status);
        if (U_FAILURE(status)) { return length; }
        if (tag.type == TYPE_CURRENCY_OVERFLOW) {
            // Don't go to the provider for this special case
            length += output.insertCodePoint(
                position + length,
                0xFFFD,
                {UFIELD_CATEGORY_NUMBER, UNUM_CURRENCY_FIELD},
                status);
        } else if (tag.type < 0) {
            length += output.insert(
                    position + length, provider.getSymbol(tag.type), getFieldForType(tag.type), status);
        } else {
            length += output.insertCodePoint(position + length, tag.codePoint, field, status);
        }
    }
    return length;
}

int32_t AffixUtils::unescapedCodePointCount(const UnicodeString &affixPattern,
                                            const SymbolProvider &provider, UErrorCode &status) {
    int32_t length = 0;
    AffixTag tag;
    while (hasNext(tag, affixPattern)) {
        tag = nextToken(tag, affixPattern, status);
        if (U_FAILURE(status)) { return length; }
        if (tag.type == TYPE_CURRENCY_OVERFLOW) {
            length += 1;
        } else if (tag.type < 0) {
            length += provider.getSymbol(tag.type).length();
        } else {
            length += U16_LENGTH(tag.codePoint);
        }
    }
    return length;
}

bool
AffixUtils::containsType(const UnicodeString &affixPattern, AffixPatternType type, UErrorCode &status) {
    if (affixPattern.length() == 0) {
        return false;
    }
    AffixTag tag;
    while (hasNext(tag, affixPattern)) {
        tag = nextToken(tag, affixPattern, status);
        if (U_FAILURE(status)) { return false; }
        if (tag.type == type) {
            return true;
        }
    }
    return false;
}

bool AffixUtils::hasCurrencySymbols(const UnicodeString &affixPattern, UErrorCode &status) {
    if (affixPattern.length() == 0) {
        return false;
    }
    AffixTag tag;
    while (hasNext(tag, affixPattern)) {
        tag = nextToken(tag, affixPattern, status);
        if (U_FAILURE(status)) { return false; }
        if (tag.type < 0 && getFieldForType(tag.type) == Field(UFIELD_CATEGORY_NUMBER, UNUM_CURRENCY_FIELD)) {
            return true;
        }
    }
    return false;
}

UnicodeString AffixUtils::replaceType(const UnicodeString &affixPattern, AffixPatternType type,
                                      char16_t replacementChar, UErrorCode &status) {
    UnicodeString output(affixPattern); // copy
    if (affixPattern.length() == 0) {
        return output;
    }
    AffixTag tag;
    while (hasNext(tag, affixPattern)) {
        tag = nextToken(tag, affixPattern, status);
        if (U_FAILURE(status)) { return output; }
        if (tag.type == type) {
            output.replace(tag.offset - 1, 1, replacementChar);
        }
    }
    return output;
}

bool AffixUtils::containsOnlySymbolsAndIgnorables(const UnicodeString& affixPattern,
                                                  const UnicodeSet& ignorables, UErrorCode& status) {
    if (affixPattern.length() == 0) {
        return true;
    }
    AffixTag tag;
    while (hasNext(tag, affixPattern)) {
        tag = nextToken(tag, affixPattern, status);
        if (U_FAILURE(status)) { return false; }
        if (tag.type == TYPE_CODEPOINT && !ignorables.contains(tag.codePoint)) {
            return false;
        }
    }
    return true;
}

void AffixUtils::iterateWithConsumer(const UnicodeString& affixPattern, TokenConsumer& consumer,
                                     UErrorCode& status) {
    if (affixPattern.length() == 0) {
        return;
    }
    AffixTag tag;
    while (hasNext(tag, affixPattern)) {
        tag = nextToken(tag, affixPattern, status);
        if (U_FAILURE(status)) { return; }
        consumer.consumeToken(tag.type, tag.codePoint, status);
        if (U_FAILURE(status)) { return; }
    }
}

AffixTag AffixUtils::nextToken(AffixTag tag, const UnicodeString &patternString, UErrorCode &status) {
    int32_t offset = tag.offset;
    int32_t state = tag.state;
    for (; offset < patternString.length();) {
        UChar32 cp = patternString.char32At(offset);
        int32_t count = U16_LENGTH(cp);

        switch (state) {
            case STATE_BASE:
                switch (cp) {
                    case u'\'':
                        state = STATE_FIRST_QUOTE;
                        offset += count;
                        // continue to the next code point
                        break;
                    case u'-':
                        return makeTag(offset + count, TYPE_MINUS_SIGN, STATE_BASE, 0);
                    case u'+':
                        return makeTag(offset + count, TYPE_PLUS_SIGN, STATE_BASE, 0);
                    case u'~':
                        return makeTag(offset + count, TYPE_APPROXIMATELY_SIGN, STATE_BASE, 0);
                    case u'%':
                        return makeTag(offset + count, TYPE_PERCENT, STATE_BASE, 0);
                    case u'‰':
                        return makeTag(offset + count, TYPE_PERMILLE, STATE_BASE, 0);
                    case u'¤':
                        state = STATE_FIRST_CURR;
                        offset += count;
                        // continue to the next code point
                        break;
                    default:
                        return makeTag(offset + count, TYPE_CODEPOINT, STATE_BASE, cp);
                }
                break;
            case STATE_FIRST_QUOTE:
                if (cp == u'\'') {
                    return makeTag(offset + count, TYPE_CODEPOINT, STATE_BASE, cp);
                } else {
                    return makeTag(offset + count, TYPE_CODEPOINT, STATE_INSIDE_QUOTE, cp);
                }
            case STATE_INSIDE_QUOTE:
                if (cp == u'\'') {
                    state = STATE_AFTER_QUOTE;
                    offset += count;
                    // continue to the next code point
                    break;
                } else {
                    return makeTag(offset + count, TYPE_CODEPOINT, STATE_INSIDE_QUOTE, cp);
                }
            case STATE_AFTER_QUOTE:
                if (cp == u'\'') {
                    return makeTag(offset + count, TYPE_CODEPOINT, STATE_INSIDE_QUOTE, cp);
                } else {
                    state = STATE_BASE;
                    // re-evaluate this code point
                    break;
                }
            case STATE_FIRST_CURR:
                if (cp == u'¤') {
                    state = STATE_SECOND_CURR;
                    offset += count;
                    // continue to the next code point
                    break;
                } else {
                    return makeTag(offset, TYPE_CURRENCY_SINGLE, STATE_BASE, 0);
                }
            case STATE_SECOND_CURR:
                if (cp == u'¤') {
                    state = STATE_THIRD_CURR;
                    offset += count;
                    // continue to the next code point
                    break;
                } else {
                    return makeTag(offset, TYPE_CURRENCY_DOUBLE, STATE_BASE, 0);
                }
            case STATE_THIRD_CURR:
                if (cp == u'¤') {
                    state = STATE_FOURTH_CURR;
                    offset += count;
                    // continue to the next code point
                    break;
                } else {
                    return makeTag(offset, TYPE_CURRENCY_TRIPLE, STATE_BASE, 0);
                }
            case STATE_FOURTH_CURR:
                if (cp == u'¤') {
                    state = STATE_FIFTH_CURR;
                    offset += count;
                    // continue to the next code point
                    break;
                } else {
                    return makeTag(offset, TYPE_CURRENCY_QUAD, STATE_BASE, 0);
                }
            case STATE_FIFTH_CURR:
                if (cp == u'¤') {
                    state = STATE_OVERFLOW_CURR;
                    offset += count;
                    // continue to the next code point
                    break;
                } else {
                    return makeTag(offset, TYPE_CURRENCY_QUINT, STATE_BASE, 0);
                }
            case STATE_OVERFLOW_CURR:
                if (cp == u'¤') {
                    offset += count;
                    // continue to the next code point and loop back to this state
                    break;
                } else {
                    return makeTag(offset, TYPE_CURRENCY_OVERFLOW, STATE_BASE, 0);
                }
            default:
                UPRV_UNREACHABLE;
        }
    }
    // End of string
    switch (state) {
        case STATE_BASE:
            // No more tokens in string.
            return {-1};
        case STATE_FIRST_QUOTE:
        case STATE_INSIDE_QUOTE:
            // For consistent behavior with the JDK and ICU 58, set an error here.
            status = U_ILLEGAL_ARGUMENT_ERROR;
            return {-1};
        case STATE_AFTER_QUOTE:
            // No more tokens in string.
            return {-1};
        case STATE_FIRST_CURR:
            return makeTag(offset, TYPE_CURRENCY_SINGLE, STATE_BASE, 0);
        case STATE_SECOND_CURR:
            return makeTag(offset, TYPE_CURRENCY_DOUBLE, STATE_BASE, 0);
        case STATE_THIRD_CURR:
            return makeTag(offset, TYPE_CURRENCY_TRIPLE, STATE_BASE, 0);
        case STATE_FOURTH_CURR:
            return makeTag(offset, TYPE_CURRENCY_QUAD, STATE_BASE, 0);
        case STATE_FIFTH_CURR:
            return makeTag(offset, TYPE_CURRENCY_QUINT, STATE_BASE, 0);
        case STATE_OVERFLOW_CURR:
            return makeTag(offset, TYPE_CURRENCY_OVERFLOW, STATE_BASE, 0);
        default:
            UPRV_UNREACHABLE;
    }
}

bool AffixUtils::hasNext(const AffixTag &tag, const UnicodeString &string) {
    // First check for the {-1} and default initializer syntax.
    if (tag.offset < 0) {
        return false;
    } else if (tag.offset == 0) {
        return string.length() > 0;
    }
    // The rest of the fields are safe to use now.
    // Special case: the last character in string is an end quote.
    if (tag.state == STATE_INSIDE_QUOTE && tag.offset == string.length() - 1 &&
        string.charAt(tag.offset) == u'\'') {
        return false;
    } else if (tag.state != STATE_BASE) {
        return true;
    } else {
        return tag.offset < string.length();
    }
}

#endif /* #if !UCONFIG_NO_FORMATTING */

Coverage Report

Created: 2025-01-28 06:38

Line	Count	Source (jump to first uncovered line)
1		// © 2017 and later: Unicode, Inc. and others.
2		// License & terms of use: http://www.unicode.org/copyright.html
3
4		#include "unicode/utypes.h"
5
6		#if !UCONFIG_NO_FORMATTING
7
8		#include "number_affixutils.h"
9		#include "unicode/utf16.h"
10		#include "unicode/uniset.h"
11
12		using namespace icu;
13		using namespace icu::number;
14		using namespace icu::number::impl;
15
16	0	TokenConsumer::~TokenConsumer() = default;
17	0	SymbolProvider::~SymbolProvider() = default;
18
19	0	int32_t AffixUtils::estimateLength(const UnicodeString &patternString, UErrorCode &status) {
20	0	AffixPatternState state = STATE_BASE;
21	0	int32_t offset = 0;
22	0	int32_t length = 0;
23	0	for (; offset < patternString.length();) {
24	0	UChar32 cp = patternString.char32At(offset);
25
26	0	switch (state) {
27	0	case STATE_BASE:
28	0	if (cp == u'\'') {
29		// First quote
30	0	state = STATE_FIRST_QUOTE;
31	0	} else {
32		// Unquoted symbol
33	0	length++;
34	0	}
35	0	break;
36	0	case STATE_FIRST_QUOTE:
37	0	if (cp == u'\'') {
38		// Repeated quote
39	0	length++;
40	0	state = STATE_BASE;
41	0	} else {
42		// Quoted code point
43	0	length++;
44	0	state = STATE_INSIDE_QUOTE;
45	0	}
46	0	break;
47	0	case STATE_INSIDE_QUOTE:
48	0	if (cp == u'\'') {
49		// End of quoted sequence
50	0	state = STATE_AFTER_QUOTE;
51	0	} else {
52		// Quoted code point
53	0	length++;
54	0	}
55	0	break;
56	0	case STATE_AFTER_QUOTE:
57	0	if (cp == u'\'') {
58		// Double quote inside of quoted sequence
59	0	length++;
60	0	state = STATE_INSIDE_QUOTE;
61	0	} else {
62		// Unquoted symbol
63	0	length++;
64	0	}
65	0	break;
66	0	default:
67	0	UPRV_UNREACHABLE;
68	0	}
69
70	0	offset += U16_LENGTH(cp);
71	0	}
72
73	0	switch (state) {
74	0	case STATE_FIRST_QUOTE:
75	0	case STATE_INSIDE_QUOTE:
76	0	status = U_ILLEGAL_ARGUMENT_ERROR;
77	0	break;
78	0	default:
79	0	break;
80	0	}
81
82	0	return length;
83	0	}
84
85	0	UnicodeString AffixUtils::escape(const UnicodeString &input) {
86	0	AffixPatternState state = STATE_BASE;
87	0	int32_t offset = 0;
88	0	UnicodeString output;
89	0	for (; offset < input.length();) {
90	0	UChar32 cp = input.char32At(offset);
91
92	0	switch (cp) {
93	0	case u'\'':
94	0	output.append(u"''", -1);
95	0	break;
96
97	0	case u'-':
98	0	case u'+':
99	0	case u'%':
100	0	case u'‰':
101	0	case u'¤':
102	0	if (state == STATE_BASE) {
103	0	output.append(u'\'');
104	0	output.append(cp);
105	0	state = STATE_INSIDE_QUOTE;
106	0	} else {
107	0	output.append(cp);
108	0	}
109	0	break;
110
111	0	default:
112	0	if (state == STATE_INSIDE_QUOTE) {
113	0	output.append(u'\'');
114	0	output.append(cp);
115	0	state = STATE_BASE;
116	0	} else {
117	0	output.append(cp);
118	0	}
119	0	break;
120	0	}
121	0	offset += U16_LENGTH(cp);
122	0	}
123
124	0	if (state == STATE_INSIDE_QUOTE) {
125	0	output.append(u'\'');
126	0	}
127
128	0	return output;
129	0	}
130
131	0	Field AffixUtils::getFieldForType(AffixPatternType type) {
132	0	switch (type) {
133	0	case TYPE_MINUS_SIGN:
134	0	return {UFIELD_CATEGORY_NUMBER, UNUM_SIGN_FIELD};
135	0	case TYPE_PLUS_SIGN:
136	0	return {UFIELD_CATEGORY_NUMBER, UNUM_SIGN_FIELD};
137	0	case TYPE_APPROXIMATELY_SIGN:
138		// TODO: Introduce a new field for the approximately sign?
139	0	return {UFIELD_CATEGORY_NUMBER, UNUM_SIGN_FIELD};
140	0	case TYPE_PERCENT:
141	0	return {UFIELD_CATEGORY_NUMBER, UNUM_PERCENT_FIELD};
142	0	case TYPE_PERMILLE:
143	0	return {UFIELD_CATEGORY_NUMBER, UNUM_PERMILL_FIELD};
144	0	case TYPE_CURRENCY_SINGLE:
145	0	return {UFIELD_CATEGORY_NUMBER, UNUM_CURRENCY_FIELD};
146	0	case TYPE_CURRENCY_DOUBLE:
147	0	return {UFIELD_CATEGORY_NUMBER, UNUM_CURRENCY_FIELD};
148	0	case TYPE_CURRENCY_TRIPLE:
149	0	return {UFIELD_CATEGORY_NUMBER, UNUM_CURRENCY_FIELD};
150	0	case TYPE_CURRENCY_QUAD:
151	0	return {UFIELD_CATEGORY_NUMBER, UNUM_CURRENCY_FIELD};
152	0	case TYPE_CURRENCY_QUINT:
153	0	return {UFIELD_CATEGORY_NUMBER, UNUM_CURRENCY_FIELD};
154	0	case TYPE_CURRENCY_OVERFLOW:
155	0	return {UFIELD_CATEGORY_NUMBER, UNUM_CURRENCY_FIELD};
156	0	default:
157	0	UPRV_UNREACHABLE;
158	0	}
159	0	}
160
161		int32_t
162		AffixUtils::unescape(const UnicodeString &affixPattern, FormattedStringBuilder &output, int32_t position,
163	0	const SymbolProvider &provider, Field field, UErrorCode &status) {
164	0	int32_t length = 0;
165	0	AffixTag tag;
166	0	while (hasNext(tag, affixPattern)) {
167	0	tag = nextToken(tag, affixPattern, status);
168	0	if (U_FAILURE(status)) { return length; }
169	0	if (tag.type == TYPE_CURRENCY_OVERFLOW) {
170		// Don't go to the provider for this special case
171	0	length += output.insertCodePoint(
172	0	position + length,
173	0	0xFFFD,
174	0	{UFIELD_CATEGORY_NUMBER, UNUM_CURRENCY_FIELD},
175	0	status);
176	0	} else if (tag.type < 0) {
177	0	length += output.insert(
178	0	position + length, provider.getSymbol(tag.type), getFieldForType(tag.type), status);
179	0	} else {
180	0	length += output.insertCodePoint(position + length, tag.codePoint, field, status);
181	0	}
182	0	}
183	0	return length;
184	0	}
185
186		int32_t AffixUtils::unescapedCodePointCount(const UnicodeString &affixPattern,
187	0	const SymbolProvider &provider, UErrorCode &status) {
188	0	int32_t length = 0;
189	0	AffixTag tag;
190	0	while (hasNext(tag, affixPattern)) {
191	0	tag = nextToken(tag, affixPattern, status);
192	0	if (U_FAILURE(status)) { return length; }
193	0	if (tag.type == TYPE_CURRENCY_OVERFLOW) {
194	0	length += 1;
195	0	} else if (tag.type < 0) {
196	0	length += provider.getSymbol(tag.type).length();
197	0	} else {
198	0	length += U16_LENGTH(tag.codePoint);
199	0	}
200	0	}
201	0	return length;
202	0	}
203
204		bool
205	0	AffixUtils::containsType(const UnicodeString &affixPattern, AffixPatternType type, UErrorCode &status) {
206	0	if (affixPattern.length() == 0) {
207	0	return false;
208	0	}
209	0	AffixTag tag;
210	0	while (hasNext(tag, affixPattern)) {
211	0	tag = nextToken(tag, affixPattern, status);
212	0	if (U_FAILURE(status)) { return false; }
213	0	if (tag.type == type) {
214	0	return true;
215	0	}
216	0	}
217	0	return false;
218	0	}
219
220	0	bool AffixUtils::hasCurrencySymbols(const UnicodeString &affixPattern, UErrorCode &status) {
221	0	if (affixPattern.length() == 0) {
222	0	return false;
223	0	}
224	0	AffixTag tag;
225	0	while (hasNext(tag, affixPattern)) {
226	0	tag = nextToken(tag, affixPattern, status);
227	0	if (U_FAILURE(status)) { return false; }
228	0	if (tag.type < 0 && getFieldForType(tag.type) == Field(UFIELD_CATEGORY_NUMBER, UNUM_CURRENCY_FIELD)) {
229	0	return true;
230	0	}
231	0	}
232	0	return false;
233	0	}
234
235		UnicodeString AffixUtils::replaceType(const UnicodeString &affixPattern, AffixPatternType type,
236	0	char16_t replacementChar, UErrorCode &status) {
237	0	UnicodeString output(affixPattern); // copy
238	0	if (affixPattern.length() == 0) {
239	0	return output;
240	0	}
241	0	AffixTag tag;
242	0	while (hasNext(tag, affixPattern)) {
243	0	tag = nextToken(tag, affixPattern, status);
244	0	if (U_FAILURE(status)) { return output; }
245	0	if (tag.type == type) {
246	0	output.replace(tag.offset - 1, 1, replacementChar);
247	0	}
248	0	}
249	0	return output;
250	0	}
251
252		bool AffixUtils::containsOnlySymbolsAndIgnorables(const UnicodeString& affixPattern,
253	0	const UnicodeSet& ignorables, UErrorCode& status) {
254	0	if (affixPattern.length() == 0) {
255	0	return true;
256	0	}
257	0	AffixTag tag;
258	0	while (hasNext(tag, affixPattern)) {
259	0	tag = nextToken(tag, affixPattern, status);
260	0	if (U_FAILURE(status)) { return false; }
261	0	if (tag.type == TYPE_CODEPOINT && !ignorables.contains(tag.codePoint)) {
262	0	return false;
263	0	}
264	0	}
265	0	return true;
266	0	}
267
268		void AffixUtils::iterateWithConsumer(const UnicodeString& affixPattern, TokenConsumer& consumer,
269	0	UErrorCode& status) {
270	0	if (affixPattern.length() == 0) {
271	0	return;
272	0	}
273	0	AffixTag tag;
274	0	while (hasNext(tag, affixPattern)) {
275	0	tag = nextToken(tag, affixPattern, status);
276	0	if (U_FAILURE(status)) { return; }
277	0	consumer.consumeToken(tag.type, tag.codePoint, status);
278	0	if (U_FAILURE(status)) { return; }
279	0	}
280	0	}
281
282	0	AffixTag AffixUtils::nextToken(AffixTag tag, const UnicodeString &patternString, UErrorCode &status) {
283	0	int32_t offset = tag.offset;
284	0	int32_t state = tag.state;
285	0	for (; offset < patternString.length();) {
286	0	UChar32 cp = patternString.char32At(offset);
287	0	int32_t count = U16_LENGTH(cp);
288
289	0	switch (state) {
290	0	case STATE_BASE:
291	0	switch (cp) {
292	0	case u'\'':
293	0	state = STATE_FIRST_QUOTE;
294	0	offset += count;
295		// continue to the next code point
296	0	break;
297	0	case u'-':
298	0	return makeTag(offset + count, TYPE_MINUS_SIGN, STATE_BASE, 0);
299	0	case u'+':
300	0	return makeTag(offset + count, TYPE_PLUS_SIGN, STATE_BASE, 0);
301	0	case u'~':
302	0	return makeTag(offset + count, TYPE_APPROXIMATELY_SIGN, STATE_BASE, 0);
303	0	case u'%':
304	0	return makeTag(offset + count, TYPE_PERCENT, STATE_BASE, 0);
305	0	case u'‰':
306	0	return makeTag(offset + count, TYPE_PERMILLE, STATE_BASE, 0);
307	0	case u'¤':
308	0	state = STATE_FIRST_CURR;
309	0	offset += count;
310		// continue to the next code point
311	0	break;
312	0	default:
313	0	return makeTag(offset + count, TYPE_CODEPOINT, STATE_BASE, cp);
314	0	}
315	0	break;
316	0	case STATE_FIRST_QUOTE:
317	0	if (cp == u'\'') {
318	0	return makeTag(offset + count, TYPE_CODEPOINT, STATE_BASE, cp);
319	0	} else {
320	0	return makeTag(offset + count, TYPE_CODEPOINT, STATE_INSIDE_QUOTE, cp);
321	0	}
322	0	case STATE_INSIDE_QUOTE:
323	0	if (cp == u'\'') {
324	0	state = STATE_AFTER_QUOTE;
325	0	offset += count;
326		// continue to the next code point
327	0	break;
328	0	} else {
329	0	return makeTag(offset + count, TYPE_CODEPOINT, STATE_INSIDE_QUOTE, cp);
330	0	}
331	0	case STATE_AFTER_QUOTE:
332	0	if (cp == u'\'') {
333	0	return makeTag(offset + count, TYPE_CODEPOINT, STATE_INSIDE_QUOTE, cp);
334	0	} else {
335	0	state = STATE_BASE;
336		// re-evaluate this code point
337	0	break;
338	0	}
339	0	case STATE_FIRST_CURR:
340	0	if (cp == u'¤') {
341	0	state = STATE_SECOND_CURR;
342	0	offset += count;
343		// continue to the next code point
344	0	break;
345	0	} else {
346	0	return makeTag(offset, TYPE_CURRENCY_SINGLE, STATE_BASE, 0);
347	0	}
348	0	case STATE_SECOND_CURR:
349	0	if (cp == u'¤') {
350	0	state = STATE_THIRD_CURR;
351	0	offset += count;
352		// continue to the next code point
353	0	break;
354	0	} else {
355	0	return makeTag(offset, TYPE_CURRENCY_DOUBLE, STATE_BASE, 0);
356	0	}
357	0	case STATE_THIRD_CURR:
358	0	if (cp == u'¤') {
359	0	state = STATE_FOURTH_CURR;
360	0	offset += count;
361		// continue to the next code point
362	0	break;
363	0	} else {
364	0	return makeTag(offset, TYPE_CURRENCY_TRIPLE, STATE_BASE, 0);
365	0	}
366	0	case STATE_FOURTH_CURR:
367	0	if (cp == u'¤') {
368	0	state = STATE_FIFTH_CURR;
369	0	offset += count;
370		// continue to the next code point
371	0	break;
372	0	} else {
373	0	return makeTag(offset, TYPE_CURRENCY_QUAD, STATE_BASE, 0);
374	0	}
375	0	case STATE_FIFTH_CURR:
376	0	if (cp == u'¤') {
377	0	state = STATE_OVERFLOW_CURR;
378	0	offset += count;
379		// continue to the next code point
380	0	break;
381	0	} else {
382	0	return makeTag(offset, TYPE_CURRENCY_QUINT, STATE_BASE, 0);
383	0	}
384	0	case STATE_OVERFLOW_CURR:
385	0	if (cp == u'¤') {
386	0	offset += count;
387		// continue to the next code point and loop back to this state
388	0	break;
389	0	} else {
390	0	return makeTag(offset, TYPE_CURRENCY_OVERFLOW, STATE_BASE, 0);
391	0	}
392	0	default:
393	0	UPRV_UNREACHABLE;
394	0	}
395	0	}
396		// End of string
397	0	switch (state) {
398	0	case STATE_BASE:
399		// No more tokens in string.
400	0	return {-1};
401	0	case STATE_FIRST_QUOTE:
402	0	case STATE_INSIDE_QUOTE:
403		// For consistent behavior with the JDK and ICU 58, set an error here.
404	0	status = U_ILLEGAL_ARGUMENT_ERROR;
405	0	return {-1};
406	0	case STATE_AFTER_QUOTE:
407		// No more tokens in string.
408	0	return {-1};
409	0	case STATE_FIRST_CURR:
410	0	return makeTag(offset, TYPE_CURRENCY_SINGLE, STATE_BASE, 0);
411	0	case STATE_SECOND_CURR:
412	0	return makeTag(offset, TYPE_CURRENCY_DOUBLE, STATE_BASE, 0);
413	0	case STATE_THIRD_CURR:
414	0	return makeTag(offset, TYPE_CURRENCY_TRIPLE, STATE_BASE, 0);
415	0	case STATE_FOURTH_CURR:
416	0	return makeTag(offset, TYPE_CURRENCY_QUAD, STATE_BASE, 0);
417	0	case STATE_FIFTH_CURR:
418	0	return makeTag(offset, TYPE_CURRENCY_QUINT, STATE_BASE, 0);
419	0	case STATE_OVERFLOW_CURR:
420	0	return makeTag(offset, TYPE_CURRENCY_OVERFLOW, STATE_BASE, 0);
421	0	default:
422	0	UPRV_UNREACHABLE;
423	0	}
424	0	}
425
426	0	bool AffixUtils::hasNext(const AffixTag &tag, const UnicodeString &string) {
427		// First check for the {-1} and default initializer syntax.
428	0	if (tag.offset < 0) {
429	0	return false;
430	0	} else if (tag.offset == 0) {
431	0	return string.length() > 0;
432	0	}
433		// The rest of the fields are safe to use now.
434		// Special case: the last character in string is an end quote.
435	0	if (tag.state == STATE_INSIDE_QUOTE && tag.offset == string.length() - 1 &&
436	0	string.charAt(tag.offset) == u'\'') {
437	0	return false;
438	0	} else if (tag.state != STATE_BASE) {
439	0	return true;
440	0	} else {
441	0	return tag.offset < string.length();
442	0	}
443	0	}
444
445		#endif /* #if !UCONFIG_NO_FORMATTING */