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39
40#include "qglobal.h"
41#include "qdebug.h"
42#include "qlocale_p.h"
43#include "qmutex.h"
44
45#include "unicode/uloc.h"
46#include "unicode/ustring.h"
47
48QT_BEGIN_NAMESPACE
49
50typedef int32_t (*Ptr_u_strToCase)(UChar *dest, int32_t destCapacity, const UChar *src, int32_t srcLength, const char *locale, UErrorCode *pErrorCode);
51
52// caseFunc can either be u_strToUpper or u_strToLower
53static bool qt_u_strToCase(const QString &str, QString *out, const char *localeID, Ptr_u_strToCase caseFunc)
54{
55 Q_ASSERT(out);
56
57 int32_t size = str.size();
58 size += size >> 2; // add 25% for possible expansions
59 QString result(size, Qt::Uninitialized);
60
61 UErrorCode status = U_ZERO_ERROR;
62
63 size = caseFunc(reinterpret_cast<UChar *>(result.data()), result.size(),
64 reinterpret_cast<const UChar *>(str.constData()), str.size(),
65 localeID, &status);
66
67 if (U_FAILURE(status) && status != U_BUFFER_OVERFLOW_ERROR)
68 return false;
69
70 if (size < result.size()) {
71 result.resize(size);
72 } else if (size > result.size()) {
73 // the resulting string is larger than our source string
74 result.resize(size);
75
76 status = U_ZERO_ERROR;
77 size = caseFunc(reinterpret_cast<UChar *>(result.data()), result.size(),
78 reinterpret_cast<const UChar *>(str.constData()), str.size(),
79 localeID, &status);
80
81 if (U_FAILURE(status))
82 return false;
83
84 // if the sizes don't match now, we give up.
85 if (size != result.size())
86 return false;
87 }
88
89 *out = result;
90 return true;
91}
92
93QString QIcu::toUpper(const QByteArray &localeID, const QString &str, bool *ok)
94{
95 QString out;
96 bool err = qt_u_strToCase(str, &out, localeID, u_strToUpper);
97 if (ok)
98 *ok = err;
99 return out;
100}
101
102QString QIcu::toLower(const QByteArray &localeID, const QString &str, bool *ok)
103{
104 QString out;
105 bool err = qt_u_strToCase(str, &out, localeID, u_strToLower);
106 if (ok)
107 *ok = err;
108 return out;
109}
110
111QT_END_NAMESPACE
112