Add ClosedFileInputSource

ClosedFileInputSource is an input source that keeps the file closed
when not reading it.

1 files changed, 62 insertions, 0 deletions

diff --git a/libtests/closed_file_input_source.cc b/libtests/closed_file_input_source.cc
new file mode 100644
index 00000000..9fd3eec7
--- /dev/null
+++ b/libtests/closed_file_input_source.cc
@@ -0,0 +1,62 @@
+#include <qpdf/ClosedFileInputSource.hh>
+#include <qpdf/FileInputSource.hh>
+
+#include <stdio.h>
+#include <string.h>
+#include <iostream>
+#include <stdlib.h>
+
+void check(std::string const& what, bool result)
+{
+    if (! result)
+    {
+        std::cout << "FAIL: " << what << std::endl;
+    }
+}
+
+void do_tests(InputSource* is)
+{
+    check("get name", "input" == is->getName());
+    check("initial tell", 0 == is->tell());
+    is->seek(11, SEEK_SET);
+    check("tell after SEEK_SET", 11 == is->tell());
+    check("read offset 11", "Offset 11" == is->readLine(100));
+    check("last offset after read 11", 11 == is->getLastOffset());
+    check("tell after read", 21 == is->tell());
+    is->findAndSkipNextEOL();
+    check("tell after findAndSkipNextEOL", 522 == is->tell());
+    is->unreadCh('Q');
+    char b[1];
+    b[0] = '\0';
+    check("read unread character", 1 == is->read(b, 1));
+    check("last offset after read unread", 521 == is->getLastOffset());
+    check("got character", 'Q' == b[0]);
+    is->seek(0, SEEK_END);
+    check("tell at end", 556 == is->tell());
+    is->seek(-25, SEEK_END);
+    check("tell before end", 531 == is->tell());
+    check("last offset unchanged after seek", 521 == is->getLastOffset());
+    is->seek(-9, SEEK_CUR);
+    check("tell after SEEK_CUR", 522 == is->tell());
+    check("read offset 522", "9 before" == is->readLine(100));
+    check("last offset after read", 522 == is->getLastOffset());
+    is->rewind();
+    check("last offset unchanged after rewind", 522 == is->getLastOffset());
+    check("tell after rewind", 0 == is->tell());
+    check("read offset at beginning", "!00000000?" == is->readLine(100));
+    check("last offset after read 0", 0 == is->getLastOffset());
+}
+
+int main()
+{
+    // This test is designed to work with a specified input file.
+    std::cout << "testing with ClosedFileInputSource\n";
+    ClosedFileInputSource cf("input");
+    do_tests(&cf);
+    std::cout << "testing with FileInputSource\n";
+    FileInputSource f;
+    f.setFilename("input");
+    do_tests(&f);
+    std::cout << "all assertions passed" << std::endl;
+    return 0;
+}