From aeb450a0b00e0996f6f6e0f4e160c4ed0b595d90 Mon Sep 17 00:00:00 2001
From: Tor Andersson <tor@ghostscript.com>
Date: Thu, 2 Jul 2009 20:05:01 +0200
Subject: Increment reference count of catalog and info objects when opening a
 pdf.

---
 apps/common/pdfapp.c | 3 +++
 apps/pdfclean.c      | 4 ++++
 apps/pdfdraw.c       | 4 ++++
 apps/pdfextract.c    | 4 ++++
 apps/pdfinfo.c       | 4 ++++
 apps/pdfshow.c       | 4 ++++
 6 files changed, 23 insertions(+)

diff --git a/apps/common/pdfapp.c b/apps/common/pdfapp.c
index bb15d354..7fa9310a 100644
--- a/apps/common/pdfapp.c
+++ b/apps/common/pdfapp.c
@@ -130,11 +130,14 @@ void pdfapp_open(pdfapp_t *app, char *filename)
 	app->xref->root = fz_resolveindirect(obj);
 	if (!app->xref->root)
 		pdfapp_error(app, fz_throw("syntaxerror: missing Root object"));
+	fz_keepobj(app->xref->root);
 
 	obj = fz_dictgets(app->xref->trailer, "Info");
 	app->xref->info = fz_resolveindirect(obj);
 	if (!app->xref->info)
 		pdfapp_warn(app, "Could not load PDF meta information.");
+	if (app->xref->info)
+		fz_keepobj(app->xref->info);
 
 	error = pdf_loadnametrees(app->xref);
 	if (error)
diff --git a/apps/pdfclean.c b/apps/pdfclean.c
index bfc94a36..211c461d 100644
--- a/apps/pdfclean.c
+++ b/apps/pdfclean.c
@@ -62,9 +62,13 @@ void openxref(char *filename, char *password)
     /* TODO: move into mupdf lib, see pdfapp_open in pdfapp.c */
     obj = fz_dictgets(xref->trailer, "Root");
     xref->root = fz_resolveindirect(obj);
+    if (xref->root)
+	fz_keepobj(xref->root);
 
     obj = fz_dictgets(xref->trailer, "Info");
     xref->info = fz_resolveindirect(obj);
+    if (xref->info)
+	fz_keepobj(xref->info);
 }
 
 /*
diff --git a/apps/pdfdraw.c b/apps/pdfdraw.c
index a5bd6063..d26d4b9b 100644
--- a/apps/pdfdraw.c
+++ b/apps/pdfdraw.c
@@ -71,9 +71,13 @@ void openxref(char *filename, char *password)
     /* TODO: move into mupdf lib, see pdfapp_open in pdfapp.c */
     obj = fz_dictgets(xref->trailer, "Root");
     xref->root = fz_resolveindirect(obj);
+    if (xref->root)
+	fz_keepobj(xref->root);
 
     obj = fz_dictgets(xref->trailer, "Info");
     xref->info = fz_resolveindirect(obj);
+    if (xref->info)
+	fz_keepobj(xref->info);
 }
 
 /*
diff --git a/apps/pdfextract.c b/apps/pdfextract.c
index b878621c..1e7e9473 100644
--- a/apps/pdfextract.c
+++ b/apps/pdfextract.c
@@ -45,9 +45,13 @@ void openxref(char *filename, char *password)
     /* TODO: move into mupdf lib, see pdfapp_open in pdfapp.c */
     obj = fz_dictgets(xref->trailer, "Root");
     xref->root = fz_resolveindirect(obj);
+    if (xref->root)
+	fz_keepobj(xref->root);
 
     obj = fz_dictgets(xref->trailer, "Info");
     xref->info = fz_resolveindirect(obj);
+    if (xref->info)
+	fz_keepobj(xref->info);
 }
 
 void closexref()
diff --git a/apps/pdfinfo.c b/apps/pdfinfo.c
index 4d3ed2bc..a1cb3fcd 100644
--- a/apps/pdfinfo.c
+++ b/apps/pdfinfo.c
@@ -96,9 +96,13 @@ void opensrc(char *filename, char *password, int loadpages)
 	/* TODO: move into mupdf lib, see pdfapp_open in pdfapp.c */
 	obj = fz_dictgets(src->trailer, "Root");
 	src->root = fz_resolveindirect(obj);
+	if (src->root)
+		fz_keepobj(src->root);
 
 	obj = fz_dictgets(src->trailer, "Info");
 	src->info = fz_resolveindirect(obj);
+	if (src->info)
+		fz_keepobj(src->info);
 
 	error = pdf_loadnametrees(src);
 	if (error)
diff --git a/apps/pdfshow.c b/apps/pdfshow.c
index 981d5b4b..994a885c 100644
--- a/apps/pdfshow.c
+++ b/apps/pdfshow.c
@@ -45,9 +45,13 @@ void openxref(char *filename, char *password)
     /* TODO: move into mupdf lib, see pdfapp_open in pdfapp.c */
     obj = fz_dictgets(xref->trailer, "Root");
     xref->root = fz_resolveindirect(obj);
+    if (xref->root)
+	fz_keepobj(xref->root);
 
     obj = fz_dictgets(xref->trailer, "Info");
     xref->info = fz_resolveindirect(obj);
+    if (xref->info)
+	fz_keepobj(xref->info);
 }
 
 void closexref()
-- 
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