ICU 56 update step 1

source/i18n/scientificnumberformatter.cpp

Index: source/i18n/scientificnumberformatter.cpp
diff --git a/source/i18n/scientificnumberformatter.cpp b/source/i18n/scientificnumberformatter.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..b3bc09939ceb9f13616990de01a336cdc7d39693
--- /dev/null
+++ b/source/i18n/scientificnumberformatter.cpp
@@ -0,0 +1,308 @@
+/*
+**********************************************************************
+* Copyright (c) 2014, International Business Machines
+* Corporation and others.  All Rights Reserved.
+**********************************************************************
+*/
+#include "unicode/utypes.h"
+
+#if !UCONFIG_NO_FORMATTING
+
+#include "unicode/scientificnumberformatter.h"
+#include "unicode/dcfmtsym.h"
+#include "unicode/fpositer.h"
+#include "unicode/utf16.h"
+#include "unicode/uniset.h"
+#include "decfmtst.h"
+#include "unicode/decimfmt.h"
+
+U_NAMESPACE_BEGIN
+
+static const UChar kSuperscriptDigits[] = {
+        0x2070,
+        0xB9,
+        0xB2,
+        0xB3,
+        0x2074,
+        0x2075,
+        0x2076,
+        0x2077,
+        0x2078,
+        0x2079};
+
+static const UChar kSuperscriptPlusSign = 0x207A;
+static const UChar kSuperscriptMinusSign = 0x207B;
+
+static UBool copyAsSuperscript(
+        const UnicodeString &s,
+        int32_t beginIndex,
+        int32_t endIndex,
+        UnicodeString &result,
+        UErrorCode &status) {
+    if (U_FAILURE(status)) {
+        return FALSE;
+    }
+    for (int32_t i = beginIndex; i < endIndex;) {
+        UChar32 c = s.char32At(i);
+        int32_t digit = u_charDigitValue(c);
+        if (digit < 0) {
+            status = U_INVALID_CHAR_FOUND;
+            return FALSE;
+        }
+        result.append(kSuperscriptDigits[digit]);
+        i += U16_LENGTH(c);
+    }
+    return TRUE;
+}
+
+ScientificNumberFormatter *ScientificNumberFormatter::createSuperscriptInstance(
+            DecimalFormat *fmtToAdopt, UErrorCode &status) {
+    return createInstance(fmtToAdopt, new SuperscriptStyle(), status);
+}
+
+ScientificNumberFormatter *ScientificNumberFormatter::createSuperscriptInstance(
+            const Locale &locale, UErrorCode &status) {
+    return createInstance(
+            static_cast<DecimalFormat *>(
+                    DecimalFormat::createScientificInstance(locale, status)),
+            new SuperscriptStyle(),
+            status);
+}
+
+ScientificNumberFormatter *ScientificNumberFormatter::createMarkupInstance(
+        DecimalFormat *fmtToAdopt,
+        const UnicodeString &beginMarkup,
+        const UnicodeString &endMarkup,
+        UErrorCode &status) {
+    return createInstance(
+            fmtToAdopt,
+            new MarkupStyle(beginMarkup, endMarkup),
+            status);
+}
+
+ScientificNumberFormatter *ScientificNumberFormatter::createMarkupInstance(
+        const Locale &locale,
+        const UnicodeString &beginMarkup,
+        const UnicodeString &endMarkup,
+        UErrorCode &status) {
+    return createInstance(
+            static_cast<DecimalFormat *>(
+                    DecimalFormat::createScientificInstance(locale, status)),
+            new MarkupStyle(beginMarkup, endMarkup),
+            status);
+}
+
+ScientificNumberFormatter *ScientificNumberFormatter::createInstance(
+            DecimalFormat *fmtToAdopt,
+            Style *styleToAdopt,
+            UErrorCode &status) {
+    LocalPointer<DecimalFormat> fmt(fmtToAdopt);
+    LocalPointer<Style> style(styleToAdopt);
+    if (U_FAILURE(status)) {
+        return NULL;
+    }
+    ScientificNumberFormatter *result =
+            new ScientificNumberFormatter(
+                    fmt.getAlias(),
+                    style.getAlias(),
+                    status);
+    if (result == NULL) {
+        status = U_MEMORY_ALLOCATION_ERROR;
+        return NULL;
+    }
+    fmt.orphan();
+    style.orphan();
+    if (U_FAILURE(status)) {
+        delete result;
+        return NULL;
+    }
+    return result;
+}
+
+ScientificNumberFormatter::Style *ScientificNumberFormatter::SuperscriptStyle::clone() const {
+    return new ScientificNumberFormatter::SuperscriptStyle(*this);
+}
+
+UnicodeString &ScientificNumberFormatter::SuperscriptStyle::format(
+        const UnicodeString &original,
+        FieldPositionIterator &fpi,
+        const UnicodeString &preExponent,
+        const DecimalFormatStaticSets &staticSets,
+        UnicodeString &appendTo,
+        UErrorCode &status) const {
+    if (U_FAILURE(status)) {
+        return appendTo;
+    }
+    FieldPosition fp;
+    int32_t copyFromOffset = 0;
+    while (fpi.next(fp)) {
+        switch (fp.getField()) {
+        case UNUM_EXPONENT_SYMBOL_FIELD:
+            appendTo.append(
+                    original,
+                    copyFromOffset,
+                    fp.getBeginIndex() - copyFromOffset);
+            copyFromOffset = fp.getEndIndex();
+            appendTo.append(preExponent);
+            break;
+        case UNUM_EXPONENT_SIGN_FIELD:
+            {
+                int32_t beginIndex = fp.getBeginIndex();
+                int32_t endIndex = fp.getEndIndex();
+                UChar32 aChar = original.char32At(beginIndex);
+                if (staticSets.fMinusSigns->contains(aChar)) {
+                    appendTo.append(
+                            original,
+                            copyFromOffset,
+                            beginIndex - copyFromOffset);
+                    appendTo.append(kSuperscriptMinusSign);
+                } else if (staticSets.fPlusSigns->contains(aChar)) {
+                    appendTo.append(
+                           original,
+                           copyFromOffset,
+                           beginIndex - copyFromOffset);
+                    appendTo.append(kSuperscriptPlusSign);
+                } else {
+                    status = U_INVALID_CHAR_FOUND;
+                    return appendTo;
+                }
+                copyFromOffset = endIndex;
+            }
+            break;
+        case UNUM_EXPONENT_FIELD:
+            appendTo.append(
+                    original,
+                    copyFromOffset,
+                    fp.getBeginIndex() - copyFromOffset);
+            if (!copyAsSuperscript(
+                    original,
+                    fp.getBeginIndex(),
+                    fp.getEndIndex(),
+                    appendTo,
+                    status)) {
+              return appendTo;
+            }
+            copyFromOffset = fp.getEndIndex();
+            break;
+        default:
+            break;
+        }
+    }
+    appendTo.append(
+            original, copyFromOffset, original.length() - copyFromOffset);
+    return appendTo;
+}
+
+ScientificNumberFormatter::Style *ScientificNumberFormatter::MarkupStyle::clone() const {
+    return new ScientificNumberFormatter::MarkupStyle(*this);
+}
+
+UnicodeString &ScientificNumberFormatter::MarkupStyle::format(
+        const UnicodeString &original,
+        FieldPositionIterator &fpi,
+        const UnicodeString &preExponent,
+        const DecimalFormatStaticSets & /*unusedDecimalFormatSets*/,
+        UnicodeString &appendTo,
+        UErrorCode &status) const {
+    if (U_FAILURE(status)) {
+        return appendTo;
+    }
+    FieldPosition fp;
+    int32_t copyFromOffset = 0;
+    while (fpi.next(fp)) {
+        switch (fp.getField()) {
+        case UNUM_EXPONENT_SYMBOL_FIELD:
+            appendTo.append(
+                    original,
+                    copyFromOffset,
+                    fp.getBeginIndex() - copyFromOffset);
+            copyFromOffset = fp.getEndIndex();
+            appendTo.append(preExponent);
+            appendTo.append(fBeginMarkup);
+            break;
+        case UNUM_EXPONENT_FIELD:
+            appendTo.append(
+                    original,
+                    copyFromOffset,
+                    fp.getEndIndex() - copyFromOffset);
+            copyFromOffset = fp.getEndIndex();
+            appendTo.append(fEndMarkup);
+            break;
+        default:
+            break;
+        }
+    }
+    appendTo.append(
+            original, copyFromOffset, original.length() - copyFromOffset);
+    return appendTo;
+}
+
+ScientificNumberFormatter::ScientificNumberFormatter(
+        DecimalFormat *fmtToAdopt, Style *styleToAdopt, UErrorCode &status)
+        : fPreExponent(),
+          fDecimalFormat(fmtToAdopt),
+          fStyle(styleToAdopt),
+          fStaticSets(NULL) {
+    if (U_FAILURE(status)) {
+        return;
+    }
+    if (fDecimalFormat == NULL || fStyle == NULL) {
+        status = U_ILLEGAL_ARGUMENT_ERROR;
+        return;
+    }
+    const DecimalFormatSymbols *sym = fDecimalFormat->getDecimalFormatSymbols();
+    if (sym == NULL) {
+        status = U_ILLEGAL_ARGUMENT_ERROR;
+        return;
+    }
+    getPreExponent(*sym, fPreExponent);
+    fStaticSets = DecimalFormatStaticSets::getStaticSets(status);
+}
+
+ScientificNumberFormatter::ScientificNumberFormatter(
+        const ScientificNumberFormatter &other)
+        : UObject(other),
+          fPreExponent(other.fPreExponent),
+          fDecimalFormat(NULL),
+          fStyle(NULL),
+          fStaticSets(other.fStaticSets) {
+    fDecimalFormat = static_cast<DecimalFormat *>(
+            other.fDecimalFormat->clone());
+    fStyle = other.fStyle->clone();
+}
+
+ScientificNumberFormatter::~ScientificNumberFormatter() {
+    delete fDecimalFormat;
+    delete fStyle;
+}
+
+UnicodeString &ScientificNumberFormatter::format(
+        const Formattable &number,
+        UnicodeString &appendTo,
+        UErrorCode &status) const {
+    if (U_FAILURE(status)) {
+        return appendTo;
+    }
+    UnicodeString original;
+    FieldPositionIterator fpi;
+    fDecimalFormat->format(number, original, &fpi, status);
+    return fStyle->format(
+            original,
+            fpi,
+            fPreExponent,
+            *fStaticSets,
+            appendTo,
+            status);
+}
+
+void ScientificNumberFormatter::getPreExponent(
+        const DecimalFormatSymbols &dfs, UnicodeString &preExponent) {
+    preExponent.append(dfs.getConstSymbol(
+            DecimalFormatSymbols::kExponentMultiplicationSymbol));
+    preExponent.append(dfs.getConstSymbol(DecimalFormatSymbols::kOneDigitSymbol));
+    preExponent.append(dfs.getConstSymbol(DecimalFormatSymbols::kZeroDigitSymbol));
+}
+
+U_NAMESPACE_END
+
+#endif /* !UCONFIG_NO_FORMATTING */