From: ellson <devnull@localhost>
Date: Sun, 21 Sep 2008 02:10:38 +0000 (+0000)
Subject: double size of graph stack and error on overflow
X-Git-Tag: LAST_LIBGRAPH~32^2~3356
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=6230ba288ea713eeb111a569c8dd43c77f65c0ca;p=graphviz

double size of graph stack and error on overflow
---

diff --git a/lib/graph/parser.y b/lib/graph/parser.y
index 4bb215e7b..b5d3db453 100644
--- a/lib/graph/parser.y
+++ b/lib/graph/parser.y
@@ -31,8 +31,14 @@ static Agraph_t		*G;
 static Agnode_t		*N;
 static Agedge_t		*E;
 static objstack_t	*SP;
-static Agraph_t		*Gstack[32];
-static int			GSP;
+#if 0
+static Agraph_t		**Gstack;
+static int		GSP_allocated, GSP;
+#else
+#define GSTACK_SIZE 64
+static Agraph_t         *Gstack[GSTACK_SIZE];
+static int		GSP;
+#endif
 
 static void subgraph_warn (void)
 {
@@ -44,8 +50,19 @@ static void subgraph_warn (void)
 
 static void push_subg(Agraph_t *g)
 {
+#if 0
+	if (GSP >= GSP_allocated) {
+		GSP_allocated += 32;
+		Gstack = realloc(Gstack, sizeof(Agraph_t*));
+	}
+#else
+	if (GSP == GSTACK_SIZE) {
+		agerr (AGERR, "Gstack overflow in graph parser\n"); exit(1);
+	}
+#endif
 	G = Gstack[GSP++] = g;
 }
+	
 
 static Agraph_t *pop_subg(void)
 {