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guard against dereferencing null pointers

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This commit is contained in:
Georg Baum 2012-11-25 19:07:57 +01:00
parent b1ce750589
commit 89c60f388a
1 changed files with 18 additions and 0 deletions
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18
src/LyXVC.cpp
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@ -176,6 +176,8 @@ bool LyXVC::registrer()
string LyXVC::checkIn()
{
LYXERR(Debug::LYXVC, "LyXVC: checkIn");
if (!vcs)
return string();
docstring empty(_("(no log message)"));
docstring response;
string log;
@ -201,6 +203,8 @@ string LyXVC::checkIn()
string LyXVC::checkOut()
{
if (!vcs)
return string();
//RCS allows checkOut only in ReadOnly mode
if (vcs->toggleReadOnlyEnabled() && !owner_->isReadonly())
return string();
@ -213,6 +217,8 @@ string LyXVC::checkOut()
string LyXVC::repoUpdate()
{
LYXERR(Debug::LYXVC, "LyXVC: repoUpdate");
if (!vcs)
return string();
return vcs->repoUpdate();
}
@ -220,6 +226,8 @@ string LyXVC::repoUpdate()
string LyXVC::lockingToggle()
{
LYXERR(Debug::LYXVC, "LyXVC: toggle locking property");
if (!vcs)
return string();
return vcs->lockingToggle();
}
@ -227,6 +235,8 @@ string LyXVC::lockingToggle()
bool LyXVC::revert()
{
LYXERR(Debug::LYXVC, "LyXVC: revert");
if (!vcs)
return false;
docstring const file = owner_->fileName().displayName(20);
docstring text = bformat(_("Reverting to the stored version of the "
@ -243,12 +253,16 @@ bool LyXVC::revert()
void LyXVC::undoLast()
{
if (!vcs)
return;
vcs->undoLast();
}
void LyXVC::toggleReadOnly()
{
if (!vcs)
return;
if (!vcs->toggleReadOnlyEnabled())
return;
@ -277,12 +291,16 @@ bool LyXVC::inUse() const
string const LyXVC::versionString() const
{
if (!vcs)
return string();
return vcs->versionString();
}
bool LyXVC::locking() const
{
if (!vcs)
return false;
return vcs->status() != VCS::NOLOCKING;
}