Add new FileInputSource constructors

ChangeLog

@@ -1,5 +1,8 @@
 2022-05-04  Jay Berkenbilt  <ejb@ql.org>
 
+        * FileInputSource has new constructors that eliminate the need to
+        call setFilename or setFile in most cases.
+
         * Enhance JSON by adding a write method that takes a Pipeline* and
         depth, and add several helper methods to make it easier to write
         large amounts of JSON incrementally without having to have the

include/qpdf/FileInputSource.hh

@@ -30,6 +30,10 @@ class QPDF_DLL_CLASS FileInputSource: public InputSource
     QPDF_DLL
     FileInputSource();
     QPDF_DLL
+    FileInputSource(char const* filename);
+    QPDF_DLL
+    FileInputSource(char const* description, FILE* filep, bool close_file);
+    QPDF_DLL
     void setFilename(char const* filename);
     QPDF_DLL
     void setFile(char const* description, FILE* filep, bool close_file);

libqpdf/ClosedFileInputSource.cc

@@ -24,8 +24,8 @@ void
 ClosedFileInputSource::before()
 {
     if (0 == this->m->fis.get()) {
-        this->m->fis = std::make_shared<FileInputSource>();
+        this->m->fis =
-        this->m->fis->setFilename(this->m->filename.c_str());
+            std::make_shared<FileInputSource>(this->m->filename.c_str());
         this->m->fis->seek(this->m->offset, SEEK_SET);
         this->m->fis->setLastOffset(this->last_offset);
     }

libqpdf/FileInputSource.cc

@@ -23,6 +23,19 @@ FileInputSource::FileInputSource() :
 {
 }
 
+FileInputSource::FileInputSource(char const* filename) :
+    m(new Members(false))
+{
+    setFilename(filename);
+}
+
+FileInputSource::FileInputSource(
+    char const* description, FILE* filep, bool close_file) :
+    m(new Members(false))
+{
+    setFile(description, filep, close_file);
+}
+
 void
 FileInputSource::setFilename(char const* filename)
 {

libqpdf/QPDF.cc

@@ -270,8 +270,7 @@ QPDF::~QPDF()
 void
 QPDF::processFile(char const* filename, char const* password)
 {
-    FileInputSource* fi = new FileInputSource();
+    FileInputSource* fi = new FileInputSource(filename);
-    fi->setFilename(filename);
     processInputSource(std::shared_ptr<InputSource>(fi), password);
 }
 
@@ -279,8 +278,7 @@ void
 QPDF::processFile(
     char const* description, FILE* filep, bool close_file, char const* password)
 {
-    FileInputSource* fi = new FileInputSource();
+    FileInputSource* fi = new FileInputSource(description, filep, close_file);
-    fi->setFile(description, filep, close_file);
     processInputSource(std::shared_ptr<InputSource>(fi), password);
 }
 

libqpdf/QPDFJob.cc

@@ -2445,9 +2445,9 @@ QPDFJob::handlePageSpecs(
                 cis->stayOpen(true);
             } else {
                 QTC::TC("qpdf", "QPDFJob keep files open y");
-                FileInputSource* fis = new FileInputSource();
+                FileInputSource* fis =
+                    new FileInputSource(page_spec.filename.c_str());
                 is = std::shared_ptr<InputSource>(fis);
-                fis->setFilename(page_spec.filename.c_str());
             }
             std::shared_ptr<QPDF> qpdf_ph =
                 processInputSource(is, password, true);

libtests/closed_file_input_source.cc

@@ -73,8 +73,7 @@ main()
     do_tests(&cf2);
     cf2.stayOpen(false);
     std::cout << "testing with FileInputSource\n";
-    FileInputSource f;
+    FileInputSource f("input");
-    f.setFilename("input");
     do_tests(&f);
     std::cout << "all assertions passed" << std::endl;
     return 0;

qpdf/test_tokenizer.cc

@@ -191,8 +191,7 @@ process(char const* filename, bool include_ignorable, size_t max_len)
     std::shared_ptr<InputSource> is;
 
     // Tokenize file, skipping streams
-    FileInputSource* fis = new FileInputSource();
+    FileInputSource* fis = new FileInputSource(filename);
-    fis->setFilename(filename);
     is = std::shared_ptr<InputSource>(fis);
     dump_tokens(is, "FILE", max_len, include_ignorable, true, false);