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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
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Add m-esr52 at 52.6.0
Diffstat (limited to 'intl/icu/source/common/simpleformatter.cpp')
-rw-r--r--intl/icu/source/common/simpleformatter.cpp314
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diff --git a/intl/icu/source/common/simpleformatter.cpp b/intl/icu/source/common/simpleformatter.cpp
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+// Copyright (C) 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+******************************************************************************
+* Copyright (C) 2014-2016, International Business Machines
+* Corporation and others. All Rights Reserved.
+******************************************************************************
+* simpleformatter.cpp
+*/
+
+#include "unicode/utypes.h"
+#include "unicode/simpleformatter.h"
+#include "unicode/unistr.h"
+#include "uassert.h"
+
+U_NAMESPACE_BEGIN
+
+namespace {
+
+/**
+ * Argument numbers must be smaller than this limit.
+ * Text segment lengths are offset by this much.
+ * This is currently the only unused char value in compiled patterns,
+ * except it is the maximum value of the first unit (max arg +1).
+ */
+const int32_t ARG_NUM_LIMIT = 0x100;
+/**
+ * Initial and maximum char/UChar value set for a text segment.
+ * Segment length char values are from ARG_NUM_LIMIT+1 to this value here.
+ * Normally 0xffff, but can be as small as ARG_NUM_LIMIT+1 for testing.
+ */
+const UChar SEGMENT_LENGTH_PLACEHOLDER_CHAR = 0xffff;
+/**
+ * Maximum length of a text segment. Longer segments are split into shorter ones.
+ */
+const int32_t MAX_SEGMENT_LENGTH = SEGMENT_LENGTH_PLACEHOLDER_CHAR - ARG_NUM_LIMIT;
+
+enum {
+ APOS = 0x27,
+ DIGIT_ZERO = 0x30,
+ DIGIT_ONE = 0x31,
+ DIGIT_NINE = 0x39,
+ OPEN_BRACE = 0x7b,
+ CLOSE_BRACE = 0x7d
+};
+
+inline UBool isInvalidArray(const void *array, int32_t length) {
+ return (length < 0 || (array == NULL && length != 0));
+}
+
+} // namespace
+
+SimpleFormatter &SimpleFormatter::operator=(const SimpleFormatter& other) {
+ if (this == &other) {
+ return *this;
+ }
+ compiledPattern = other.compiledPattern;
+ return *this;
+}
+
+SimpleFormatter::~SimpleFormatter() {}
+
+UBool SimpleFormatter::applyPatternMinMaxArguments(
+ const UnicodeString &pattern,
+ int32_t min, int32_t max,
+ UErrorCode &errorCode) {
+ if (U_FAILURE(errorCode)) {
+ return FALSE;
+ }
+ // Parse consistent with MessagePattern, but
+ // - support only simple numbered arguments
+ // - build a simple binary structure into the result string
+ const UChar *patternBuffer = pattern.getBuffer();
+ int32_t patternLength = pattern.length();
+ // Reserve the first char for the number of arguments.
+ compiledPattern.setTo((UChar)0);
+ int32_t textLength = 0;
+ int32_t maxArg = -1;
+ UBool inQuote = FALSE;
+ for (int32_t i = 0; i < patternLength;) {
+ UChar c = patternBuffer[i++];
+ if (c == APOS) {
+ if (i < patternLength && (c = patternBuffer[i]) == APOS) {
+ // double apostrophe, skip the second one
+ ++i;
+ } else if (inQuote) {
+ // skip the quote-ending apostrophe
+ inQuote = FALSE;
+ continue;
+ } else if (c == OPEN_BRACE || c == CLOSE_BRACE) {
+ // Skip the quote-starting apostrophe, find the end of the quoted literal text.
+ ++i;
+ inQuote = TRUE;
+ } else {
+ // The apostrophe is part of literal text.
+ c = APOS;
+ }
+ } else if (!inQuote && c == OPEN_BRACE) {
+ if (textLength > 0) {
+ compiledPattern.setCharAt(compiledPattern.length() - textLength - 1,
+ (UChar)(ARG_NUM_LIMIT + textLength));
+ textLength = 0;
+ }
+ int32_t argNumber;
+ if ((i + 1) < patternLength &&
+ 0 <= (argNumber = patternBuffer[i] - DIGIT_ZERO) && argNumber <= 9 &&
+ patternBuffer[i + 1] == CLOSE_BRACE) {
+ i += 2;
+ } else {
+ // Multi-digit argument number (no leading zero) or syntax error.
+ // MessagePattern permits PatternProps.skipWhiteSpace(pattern, index)
+ // around the number, but this class does not.
+ argNumber = -1;
+ if (i < patternLength && DIGIT_ONE <= (c = patternBuffer[i++]) && c <= DIGIT_NINE) {
+ argNumber = c - DIGIT_ZERO;
+ while (i < patternLength &&
+ DIGIT_ZERO <= (c = patternBuffer[i++]) && c <= DIGIT_NINE) {
+ argNumber = argNumber * 10 + (c - DIGIT_ZERO);
+ if (argNumber >= ARG_NUM_LIMIT) {
+ break;
+ }
+ }
+ }
+ if (argNumber < 0 || c != CLOSE_BRACE) {
+ errorCode = U_ILLEGAL_ARGUMENT_ERROR;
+ return FALSE;
+ }
+ }
+ if (argNumber > maxArg) {
+ maxArg = argNumber;
+ }
+ compiledPattern.append((UChar)argNumber);
+ continue;
+ } // else: c is part of literal text
+ // Append c and track the literal-text segment length.
+ if (textLength == 0) {
+ // Reserve a char for the length of a new text segment, preset the maximum length.
+ compiledPattern.append(SEGMENT_LENGTH_PLACEHOLDER_CHAR);
+ }
+ compiledPattern.append(c);
+ if (++textLength == MAX_SEGMENT_LENGTH) {
+ textLength = 0;
+ }
+ }
+ if (textLength > 0) {
+ compiledPattern.setCharAt(compiledPattern.length() - textLength - 1,
+ (UChar)(ARG_NUM_LIMIT + textLength));
+ }
+ int32_t argCount = maxArg + 1;
+ if (argCount < min || max < argCount) {
+ errorCode = U_ILLEGAL_ARGUMENT_ERROR;
+ return FALSE;
+ }
+ compiledPattern.setCharAt(0, (UChar)argCount);
+ return TRUE;
+}
+
+UnicodeString& SimpleFormatter::format(
+ const UnicodeString &value0,
+ UnicodeString &appendTo, UErrorCode &errorCode) const {
+ const UnicodeString *values[] = { &value0 };
+ return formatAndAppend(values, 1, appendTo, NULL, 0, errorCode);
+}
+
+UnicodeString& SimpleFormatter::format(
+ const UnicodeString &value0,
+ const UnicodeString &value1,
+ UnicodeString &appendTo, UErrorCode &errorCode) const {
+ const UnicodeString *values[] = { &value0, &value1 };
+ return formatAndAppend(values, 2, appendTo, NULL, 0, errorCode);
+}
+
+UnicodeString& SimpleFormatter::format(
+ const UnicodeString &value0,
+ const UnicodeString &value1,
+ const UnicodeString &value2,
+ UnicodeString &appendTo, UErrorCode &errorCode) const {
+ const UnicodeString *values[] = { &value0, &value1, &value2 };
+ return formatAndAppend(values, 3, appendTo, NULL, 0, errorCode);
+}
+
+UnicodeString& SimpleFormatter::formatAndAppend(
+ const UnicodeString *const *values, int32_t valuesLength,
+ UnicodeString &appendTo,
+ int32_t *offsets, int32_t offsetsLength, UErrorCode &errorCode) const {
+ if (U_FAILURE(errorCode)) {
+ return appendTo;
+ }
+ if (isInvalidArray(values, valuesLength) || isInvalidArray(offsets, offsetsLength) ||
+ valuesLength < getArgumentLimit()) {
+ errorCode = U_ILLEGAL_ARGUMENT_ERROR;
+ return appendTo;
+ }
+ return format(compiledPattern.getBuffer(), compiledPattern.length(), values,
+ appendTo, NULL, TRUE,
+ offsets, offsetsLength, errorCode);
+}
+
+UnicodeString &SimpleFormatter::formatAndReplace(
+ const UnicodeString *const *values, int32_t valuesLength,
+ UnicodeString &result,
+ int32_t *offsets, int32_t offsetsLength, UErrorCode &errorCode) const {
+ if (U_FAILURE(errorCode)) {
+ return result;
+ }
+ if (isInvalidArray(values, valuesLength) || isInvalidArray(offsets, offsetsLength)) {
+ errorCode = U_ILLEGAL_ARGUMENT_ERROR;
+ return result;
+ }
+ const UChar *cp = compiledPattern.getBuffer();
+ int32_t cpLength = compiledPattern.length();
+ if (valuesLength < getArgumentLimit(cp, cpLength)) {
+ errorCode = U_ILLEGAL_ARGUMENT_ERROR;
+ return result;
+ }
+
+ // If the pattern starts with an argument whose value is the same object
+ // as the result, then we keep the result contents and append to it.
+ // Otherwise we replace its contents.
+ int32_t firstArg = -1;
+ // If any non-initial argument value is the same object as the result,
+ // then we first copy its contents and use that instead while formatting.
+ UnicodeString resultCopy;
+ if (getArgumentLimit(cp, cpLength) > 0) {
+ for (int32_t i = 1; i < cpLength;) {
+ int32_t n = cp[i++];
+ if (n < ARG_NUM_LIMIT) {
+ if (values[n] == &result) {
+ if (i == 2) {
+ firstArg = n;
+ } else if (resultCopy.isEmpty() && !result.isEmpty()) {
+ resultCopy = result;
+ }
+ }
+ } else {
+ i += n - ARG_NUM_LIMIT;
+ }
+ }
+ }
+ if (firstArg < 0) {
+ result.remove();
+ }
+ return format(cp, cpLength, values,
+ result, &resultCopy, FALSE,
+ offsets, offsetsLength, errorCode);
+}
+
+UnicodeString SimpleFormatter::getTextWithNoArguments(
+ const UChar *compiledPattern, int32_t compiledPatternLength) {
+ int32_t capacity = compiledPatternLength - 1 -
+ getArgumentLimit(compiledPattern, compiledPatternLength);
+ UnicodeString sb(capacity, 0, 0); // Java: StringBuilder
+ for (int32_t i = 1; i < compiledPatternLength;) {
+ int32_t segmentLength = compiledPattern[i++] - ARG_NUM_LIMIT;
+ if (segmentLength > 0) {
+ sb.append(compiledPattern + i, segmentLength);
+ i += segmentLength;
+ }
+ }
+ return sb;
+}
+
+UnicodeString &SimpleFormatter::format(
+ const UChar *compiledPattern, int32_t compiledPatternLength,
+ const UnicodeString *const *values,
+ UnicodeString &result, const UnicodeString *resultCopy, UBool forbidResultAsValue,
+ int32_t *offsets, int32_t offsetsLength,
+ UErrorCode &errorCode) {
+ if (U_FAILURE(errorCode)) {
+ return result;
+ }
+ for (int32_t i = 0; i < offsetsLength; i++) {
+ offsets[i] = -1;
+ }
+ for (int32_t i = 1; i < compiledPatternLength;) {
+ int32_t n = compiledPattern[i++];
+ if (n < ARG_NUM_LIMIT) {
+ const UnicodeString *value = values[n];
+ if (value == NULL) {
+ errorCode = U_ILLEGAL_ARGUMENT_ERROR;
+ return result;
+ }
+ if (value == &result) {
+ if (forbidResultAsValue) {
+ errorCode = U_ILLEGAL_ARGUMENT_ERROR;
+ return result;
+ }
+ if (i == 2) {
+ // We are appending to result which is also the first value object.
+ if (n < offsetsLength) {
+ offsets[n] = 0;
+ }
+ } else {
+ if (n < offsetsLength) {
+ offsets[n] = result.length();
+ }
+ result.append(*resultCopy);
+ }
+ } else {
+ if (n < offsetsLength) {
+ offsets[n] = result.length();
+ }
+ result.append(*value);
+ }
+ } else {
+ int32_t length = n - ARG_NUM_LIMIT;
+ result.append(compiledPattern + i, length);
+ i += length;
+ }
+ }
+ return result;
+}
+
+U_NAMESPACE_END