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Port qenvironmentvariables.cpp to qsizetype 

I don't expect environments to allow values or names > 2 Gi
characters, so this is just for consistency (int is a code smell these
days).

As a drive-by, replace

   QString buffer;
   buffer.resize(n);

with

  QString buffer(n, Qt::Uninitialized);

Task-number: QTBUG-103527
Pick-to: 6.4 6.3 6.2
Change-Id: I0e41a6e7e9c44ff1ec22377329735538d5f95181
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
bb10
Marc Mutz 2022-08-04 11:50:47 +02:00 committed by Mårten Nordheim
parent 15368fb31b
commit c25cc34a05
1 changed files with 4 additions and 5 deletions
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9
src/corelib/global/qenvironmentvariables.cpp
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@ -48,7 +48,7 @@ QByteArray qgetenv(const char *varName)
getenv_s(&requiredSize, 0, 0, varName);
if (requiredSize == 0)
return buffer;
buffer.resize(int(requiredSize));
buffer.resize(qsizetype(requiredSize));
getenv_s(&requiredSize, buffer.data(), requiredSize, varName);
// requiredSize includes the terminating null, which we don't want.
Q_ASSERT(buffer.endsWith('\0'));
@ -109,15 +109,14 @@ QString qEnvironmentVariable(const char *varName, const QString &defaultValue)
{
#if defined(Q_OS_WIN)
const auto locker = qt_scoped_lock(environmentMutex);
QVarLengthArray<wchar_t, 32> wname(int(strlen(varName)) + 1);
for (int i = 0; i < wname.size(); ++i) // wname.size() is correct: will copy terminating null
QVarLengthArray<wchar_t, 32> wname(qsizetype(strlen(varName)) + 1);
for (qsizetype i = 0; i < wname.size(); ++i) // wname.size() is correct: will copy terminating null
wname[i] = uchar(varName[i]);
size_t requiredSize = 0;
QString buffer;
_wgetenv_s(&requiredSize, 0, 0, wname.data());
if (requiredSize == 0)
return defaultValue;
buffer.resize(int(requiredSize));
QString buffer(qsizetype(requiredSize), Qt::Uninitialized);
_wgetenv_s(&requiredSize, reinterpret_cast<wchar_t *>(buffer.data()), requiredSize,
wname.data());
// requiredSize includes the terminating null, which we don't want.