QPDFJob: make createsOutput callable before run()

include/qpdf/QPDFJob.hh

@@ -85,6 +85,10 @@ class QPDFJob
     QPDF_DLL
     void setOutputStreams(std::ostream* out_stream, std::ostream* err_stream);
 
+    // Returns true if output is created by the specified job.
+    QPDF_DLL
+    bool createsOutput() const;
+
     // QXXXQ set options -- implemented in QPDFJob_options.cc
 
     // QXXXQ these will not be in the final interface
@@ -108,9 +112,6 @@ class QPDFJob
     QPDF_DLL
     bool hasWarnings();
 
-    QPDF_DLL
-    bool createsOutput();       // QXXXQ need better name
-
     // Return value is bitwise OR of values from qpdf_encryption_status_e
     QPDF_DLL
     unsigned long getEncryptionStatus();
@@ -398,7 +399,6 @@ class QPDFJob
 
         std::string message_prefix;
         bool warnings;
-        bool creates_output;
         std::ostream* cout;
         std::ostream* cerr;
         unsigned long encryption_status;

libqpdf/QPDFJob.cc

@@ -322,7 +322,6 @@ ProgressReporter::reportProgress(int percentage)
 QPDFJob::Members::Members() :
     message_prefix("qpdf"),
     warnings(false),
-    creates_output(false),
     cout(&std::cout),
     cerr(&std::cerr),
     encryption_status(0)
@@ -500,8 +499,7 @@ QPDFJob::run()
     handleUnderOverlay(pdf);
     handleTransformations(pdf);
 
-    this->m->creates_output = ((o.outfilename != nullptr) || o.replace_input);
-    if (! this->m->creates_output)
+    if (! createsOutput())
     {
         doInspection(pdf);
     }
@@ -526,9 +524,10 @@ QPDFJob::hasWarnings()
 }
 
 bool
-QPDFJob::createsOutput()
+QPDFJob::createsOutput() const
 {
-    return this->m->creates_output;
+    QPDFJob const& o = *this; // QXXXQ
+    return ((o.outfilename != nullptr) || o.replace_input);
 }
 
 bool