bool overwriteFileWithNewDataIfDifferent (const File& file, const void* data, int numBytes)
{
if (file.getSize() == numBytes)
{
MemoryInputStream newStream (data, numBytes, false);
if (calculateStreamHashCode (newStream) == calculateFileHashCode (file))
return true;
}
TemporaryFile temp (file);
return temp.getFile().appendData (data, numBytes)
&& temp.overwriteTargetFileWithTemporary();
}
int64 calculateFileHashCode (const File& file)
{
ScopedPointer <FileInputStream> stream (file.createInputStream());
return stream != nullptr ? calculateStreamHashCode (*stream) : 0;
}
int64 calculateFileHashCode (const File& file)
{
std::unique_ptr<FileInputStream> stream (file.createInputStream());
return stream != nullptr ? calculateStreamHashCode (*stream) : 0;
}