fix problem with lzw decoder when run without early code change, now that we actually have test input

git-svn-id: svn+q:///qpdf/trunk@646 71b93d88-0707-0410-a8cf-f5a4172ac649

1 files changed, 9 insertions, 4 deletions

diff --git a/libtests/lzw.cc b/libtests/lzw.cc
index 09ded352..034c0bb9 100644
--- a/libtests/lzw.cc
+++ b/libtests/lzw.cc
@@ -3,13 +3,18 @@
 #include <qpdf/Pl_StdioFile.hh>
 #include <iostream>
 #include <stdlib.h>
+#include <string.h>
 
-int main()
+int main(int argc, char* argv[])
 {
+    bool early_code_change = true;
+    if ((argc == 2) && (strcmp(argv[1], "--no-early-code-change") == 0))
+    {
+	early_code_change = false;
+    }
+
     Pl_StdioFile out("stdout", stdout);
-    // We don't exercise LZWDecoder with early code change false
-    // because we have no way to generate such an LZW stream.
-    Pl_LZWDecoder decode("decode", &out, true);
+    Pl_LZWDecoder decode("decode", &out, early_code_change);
 
     try
     {