| 1 | // Copyright (C) 2016 The Qt Company Ltd. |
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| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
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| 3 | |
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| 4 | #include "qglobal.h" |
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| 5 | #include "qdebug.h" |
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| 6 | #include "qlocale_p.h" |
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| 7 | #include "qmutex.h" |
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| 8 | |
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| 9 | #include "unicode/uloc.h" |
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| 10 | #include "unicode/ustring.h" |
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| 11 | |
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| 12 | QT_BEGIN_NAMESPACE |
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| 13 | |
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| 14 | typedef int32_t (*Ptr_u_strToCase)(UChar *dest, int32_t destCapacity, const UChar *src, int32_t srcLength, const char *locale, UErrorCode *pErrorCode); |
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| 15 | |
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| 16 | // caseFunc can either be u_strToUpper or u_strToLower |
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| 17 | static bool qt_u_strToCase(const QString &str, QString *out, const char *localeID, Ptr_u_strToCase caseFunc) |
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| 18 | { |
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| 19 | Q_ASSERT(out); |
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| 20 | |
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| 21 | int32_t size = str.size(); |
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| 22 | size += size >> 2; // add 25% for possible expansions |
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| 23 | QString result(size, Qt::Uninitialized); |
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| 24 | |
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| 25 | UErrorCode status = U_ZERO_ERROR; |
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| 26 | |
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| 27 | size = caseFunc(reinterpret_cast<UChar *>(result.data()), result.size(), |
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| 28 | reinterpret_cast<const UChar *>(str.constData()), str.size(), |
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| 29 | localeID, &status); |
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| 30 | |
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| 31 | if (U_FAILURE(code: status) && status != U_BUFFER_OVERFLOW_ERROR) |
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| 32 | return false; |
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| 33 | |
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| 34 | if (size < result.size()) { |
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| 35 | result.resize(size); |
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| 36 | } else if (size > result.size()) { |
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| 37 | // the resulting string is larger than our source string |
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| 38 | result.resize(size); |
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| 39 | |
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| 40 | status = U_ZERO_ERROR; |
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| 41 | size = caseFunc(reinterpret_cast<UChar *>(result.data()), result.size(), |
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| 42 | reinterpret_cast<const UChar *>(str.constData()), str.size(), |
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| 43 | localeID, &status); |
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| 44 | |
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| 45 | if (U_FAILURE(code: status)) |
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| 46 | return false; |
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| 47 | |
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| 48 | // if the sizes don't match now, we give up. |
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| 49 | if (size != result.size()) |
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| 50 | return false; |
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| 51 | } |
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| 52 | |
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| 53 | *out = result; |
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| 54 | return true; |
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| 55 | } |
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| 56 | |
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| 57 | QString QIcu::toUpper(const QByteArray &localeID, const QString &str, bool *ok) |
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| 58 | { |
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| 59 | QString out; |
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| 60 | bool err = qt_u_strToCase(str, out: &out, localeID, u_strToUpper); |
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| 61 | if (ok) |
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| 62 | *ok = err; |
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| 63 | return out; |
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| 64 | } |
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| 65 | |
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| 66 | QString QIcu::toLower(const QByteArray &localeID, const QString &str, bool *ok) |
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| 67 | { |
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| 68 | QString out; |
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| 69 | bool err = qt_u_strToCase(str, out: &out, localeID, u_strToLower); |
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| 70 | if (ok) |
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| 71 | *ok = err; |
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| 72 | return out; |
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| 73 | } |
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| 74 | |
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| 75 | QT_END_NAMESPACE |
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| 76 | |
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