tested basic stream replacement

git-svn-id: svn+q:///qpdf/trunk@989 71b93d88-0707-0410-a8cf-f5a4172ac649

qpdf/qtest/qpdf.test

@@ -77,7 +77,7 @@ flush_tiff_cache();
 show_ntests();
 # ----------
 $td->notify("--- Miscellaneous Tests ---");
-$n_tests += 22;
+$n_tests += 26;
 
 $td->runtest("qpdf version",
 	     {$td->COMMAND => "qpdf --version"},
@@ -97,6 +97,22 @@ foreach (my $i = 1; $i <= 3; ++$i)
 		 $td->NORMALIZE_NEWLINES);
 }
 
+$td->runtest("replace stream data",
+	     {$td->COMMAND => "test_driver 7 qstream.pdf"},
+	     {$td->STRING => "test 7 done\n", $td->EXIT_STATUS => 0},
+	     $td->NORMALIZE_NEWLINES);
+$td->runtest("check output",
+	     {$td->FILE => "a.pdf"},
+	     {$td->FILE => "replaced-stream-data.out"});
+
+$td->runtest("replace stream data compressed",
+	     {$td->COMMAND => "test_driver 8 qstream.pdf"},
+	     {$td->STRING => "test 8 done\n", $td->EXIT_STATUS => 0},
+	     $td->NORMALIZE_NEWLINES);
+$td->runtest("check output",
+	     {$td->FILE => "a.pdf"},
+	     {$td->FILE => "replaced-stream-data-flate.out"});
+
 # Make sure we ignore decode parameters that we don't understand
 $td->runtest("unknown decode parameters",
 	     {$td->COMMAND => "qpdf --check fax-decode-parms.pdf"},

qpdf/qtest/qpdf/qstream.pdf

@@ -0,0 +1,90 @@
+%PDF-1.3
+1 0 obj
+<<
+  /Type /Catalog
+  /Pages 2 0 R
+  /QStream 7 0 R
+>>
+endobj
+
+2 0 obj
+<<
+  /Type /Pages
+  /Kids [
+    3 0 R
+  ]
+  /Count 1
+>>
+endobj
+
+3 0 obj
+<<
+  /Type /Page
+  /Parent 2 0 R
+  /MediaBox [0 0 612 792]
+  /Contents 4 0 R
+  /Resources <<
+    /ProcSet 5 0 R
+    /Font <<
+      /F1 6 0 R
+    >>
+  >>
+>>
+endobj
+
+4 0 obj
+<<
+  /Length 44
+>>
+stream
+BT
+  /F1 24 Tf
+  72 720 Td
+  (Potato) Tj
+ET
+endstream
+endobj
+
+5 0 obj
+[
+  /PDF
+  /Text
+]
+endobj
+
+6 0 obj
+<<
+  /Type /Font
+  /Subtype /Type1
+  /Name /F1
+  /BaseFont /Helvetica
+  /Encoding /WinAnsiEncoding
+>>
+endobj
+
+7 0 obj
+<<
+  /Length 29
+>>
+stream
+This is the old stream data.
+endstream
+endobj
+
+xref
+0 8
+0000000000 65535 f 
+0000000009 00000 n 
+0000000080 00000 n 
+0000000152 00000 n 
+0000000324 00000 n 
+0000000420 00000 n 
+0000000455 00000 n 
+0000000573 00000 n 
+trailer <<
+  /Size 8
+  /Root 1 0 R
+>>
+startxref
+654
+%%EOF

qpdf/qtest/qpdf/replaced-stream-data.out

@@ -0,0 +1,47 @@
+%PDF-1.3
+%¿÷¢þ
+1 0 obj
+<< /Pages 2 0 R /QStream 3 0 R /Type /Catalog >>
+endobj
+2 0 obj
+<< /Count 1 /Kids [ 4 0 R ] /Type /Pages >>
+endobj
+3 0 obj
+<< /Length 20 >>
+stream
+new data for stream
+endstream
+endobj
+4 0 obj
+<< /Contents 5 0 R /MediaBox [ 0 0 612 792 ] /Parent 2 0 R /Resources << /Font << /F1 6 0 R >> /ProcSet 7 0 R >> /Type /Page >>
+endobj
+5 0 obj
+<< /Length 44 >>
+stream
+BT
+  /F1 24 Tf
+  72 720 Td
+  (Potato) Tj
+ET
+endstream
+endobj
+6 0 obj
+<< /BaseFont /Helvetica /Encoding /WinAnsiEncoding /Name /F1 /Subtype /Type1 /Type /Font >>
+endobj
+7 0 obj
+[ /PDF /Text ]
+endobj
+xref
+0 8
+0000000000 65535 f 
+0000000015 00000 n 
+0000000079 00000 n 
+0000000138 00000 n 
+0000000207 00000 n 
+0000000350 00000 n 
+0000000443 00000 n 
+0000000550 00000 n 
+trailer << /Root 1 0 R /Size 8 /ID [<31415926535897932384626433832795><31415926535897932384626433832795>] >>
+startxref
+580
+%%EOF

qpdf/test_driver.cc

@@ -7,6 +7,7 @@
 #include <qpdf/QTC.hh>
 #include <qpdf/Pl_StdioFile.hh>
 #include <qpdf/Pl_Buffer.hh>
+#include <qpdf/Pl_Flate.hh>
 #include <qpdf/QPDFWriter.hh>
 #include <iostream>
 #include <stdio.h>
@@ -309,6 +310,45 @@ void runtest(int n, char const* filename)
 		  << (cleartext ? 1 : 0)
 		  << std::endl;
     }
+    else if (n == 7)
+    {
+	QPDFObjectHandle root = pdf.getRoot();
+	QPDFObjectHandle qstream = root.getKey("/QStream");
+	if (! qstream.isStream())
+	{
+	    throw std::logic_error("test 7 run on file with no QStream");
+	}
+	PointerHolder<Buffer> b = new Buffer(20);
+	unsigned char* bp = b.getPointer()->getBuffer();
+	memcpy(bp, (char*)"new data for stream\n", 20); // no null!
+	qstream.replaceStreamData(
+	    b, QPDFObjectHandle::newNull(), QPDFObjectHandle::newNull());
+	QPDFWriter w(pdf, "a.pdf");
+	w.setStaticID(true);
+	w.setStreamDataMode(qpdf_s_preserve);
+	w.write();
+    }
+    else if (n == 8)
+    {
+	QPDFObjectHandle root = pdf.getRoot();
+	QPDFObjectHandle qstream = root.getKey("/QStream");
+	if (! qstream.isStream())
+	{
+	    throw std::logic_error("test 7 run on file with no QStream");
+	}
+	Pl_Buffer p1("buffer");
+	Pl_Flate p2("compress", &p1, Pl_Flate::a_deflate);
+	p2.write((unsigned char*)"new data for stream\n", 20); // no null!
+	p2.finish();
+	PointerHolder<Buffer> b = p1.getBuffer();
+	qstream.replaceStreamData(
+	    b, QPDFObjectHandle::newName("/FlateDecode"),
+	    QPDFObjectHandle::newNull());
+	QPDFWriter w(pdf, "a.pdf");
+	w.setStaticID(true);
+	w.setStreamDataMode(qpdf_s_preserve);
+	w.write();
+    }
     else
     {
 	throw std::runtime_error(std::string("invalid test ") +