From: Emden R. Gansner <erg@research.att.com>
Date: Thu, 6 Jun 2013 17:53:49 +0000 (-0400)
Subject: Add function to release memory allocated by gvRenderData; this avoids
X-Git-Tag: LAST_LIBGRAPH~32^2~189
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=b3b7e0d1aea43baa81bf06a27d38447d6958c1b8;p=graphviz

Add function to release memory allocated by gvRenderData; this avoids
potential conflicts with run-time functions.
Also, ifdef'ed out two assignments in gvFreeLayout that are meaningless
using cgraph, as the GD_drawing(g) is already gone.
---

diff --git a/lib/gvc.def b/lib/gvc.def
index d8161cf0b..2efcf8de8 100644
--- a/lib/gvc.def
+++ b/lib/gvc.def
@@ -147,6 +147,7 @@ gvputc
 gvputs    
 gvRender    
 gvRenderData    
+gvFreeRenderData    
 gvRenderFilename    
 gvRenderJobs    
 gvToggle    
diff --git a/lib/gvc/gvc.c b/lib/gvc/gvc.c
index 672cb4d1d..b362b07fc 100644
--- a/lib/gvc/gvc.c
+++ b/lib/gvc/gvc.c
@@ -252,6 +252,14 @@ int gvRenderData(GVC_t *gvc, graph_t *g, const char *format, char **result, unsi
     return rc;
 }
 
+/* gvFreeRenderData:
+ * Utility routine to free memory allocated in gvRenderData, as the application code may use
+ * a different runtime library.
+ */
+void gvFreeRenderData (char* data)
+{
+    free (data);
+}
 
 void gvAddLibrary(GVC_t *gvc, gvplugin_library_t *lib)
 {
diff --git a/lib/gvc/gvc.h b/lib/gvc/gvc.h
index 06b60011c..a60366b2c 100644
--- a/lib/gvc/gvc.h
+++ b/lib/gvc/gvc.h
@@ -78,6 +78,9 @@ extern int gvRenderContext(GVC_t *gvc, graph_t *g, const char *format, void *con
 /* Render layout in a specified format to a malloc'ed string */
 extern int gvRenderData(GVC_t *gvc, graph_t *g, const char *format, char **result, unsigned int *length);
 
+/* Free memory allocated and pointed to by *result in gvRenderData */
+extern void gvFreeRenderData (char* data);
+
 /* Render layout according to -T and -o options found by gvParseArgs */
 extern int gvRenderJobs(GVC_t *gvc, graph_t *g);
 
diff --git a/lib/gvc/gvlayout.c b/lib/gvc/gvlayout.c
index 71a4365de..70d71a2ce 100644
--- a/lib/gvc/gvlayout.c
+++ b/lib/gvc/gvlayout.c
@@ -119,8 +119,10 @@ int gvFreeLayout(GVC_t * gvc, Agraph_t * g)
     
     if (GD_drawing(g)) {
 	graph_cleanup(g);
+#ifndef WITH_CGRAPH
 	GD_drawing(g) = NULL;
 	GD_drawing(g->root) = NULL;
+#endif
     }
     return 0;
 }