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cmSystemTools: Simplify RunSingleCommand output string construction

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Assign to the result strings instead setting to empty and appending.
The old approach was left from when we directly buffered output in
the strings.
This commit is contained in:
Brad King 2016-01-14 16:11:00 -05:00
parent dc039cc02c
commit ce3b713baa
1 changed files with 4 additions and 13 deletions
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17
Source/cmSystemTools.cxx
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@ -660,14 +660,6 @@ bool cmSystemTools::RunSingleCommand(std::vector<std::string>const& command,
argv.push_back(a->c_str());
}
argv.push_back(0);
if ( captureStdOut )
{
*captureStdOut = "";
}
if (captureStdErr && captureStdErr != captureStdOut)
{
*captureStdErr = "";
}
cmsysProcess* cp = cmsysProcess_New();
cmsysProcess_SetCommand(cp, &*argv.begin());
@ -745,14 +737,13 @@ bool cmSystemTools::RunSingleCommand(std::vector<std::string>const& command,
}
cmsysProcess_WaitForExit(cp, 0);
if ( captureStdOut && tempStdOut.begin() != tempStdOut.end())
if (captureStdOut)
{
captureStdOut->append(&*tempStdOut.begin(), tempStdOut.size());
captureStdOut->assign(tempStdOut.begin(), tempStdOut.end());
}
if ( captureStdErr && captureStdErr != captureStdOut &&
tempStdErr.begin() != tempStdErr.end())
if (captureStdErr && captureStdErr != captureStdOut)
{
captureStdErr->append(&*tempStdErr.begin(), tempStdErr.size());
captureStdErr->assign(tempStdErr.begin(), tempStdErr.end());
}
bool result = true;