From 14a0baa719b200bdbc8a85fc2cdc1cd363408e2c Mon Sep 17 00:00:00 2001
From: Matthew Fernandez <matthew.fernandez@gmail.com>
Date: Sun, 8 May 2022 17:14:13 -0700
Subject: [PATCH] graphml2gv: read XML input in chunks of 'BUFSIZ'
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The C standard library’s stdio exposes a value for the optimal chunk size for
I/O. So use this instead of our arbitrarily chosen alternative.
---
 cmd/tools/graphml2gv.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/cmd/tools/graphml2gv.c b/cmd/tools/graphml2gv.c
index 94f8fb623..cd2128ec8 100644
--- a/cmd/tools/graphml2gv.c
+++ b/cmd/tools/graphml2gv.c
@@ -16,6 +16,7 @@
 #include    <cgraph/likely.h>
 #include    <cgraph/stack.h>
 #include    <getopt.h>
+#include    <stdio.h>
 #include    <string.h>
 #ifdef HAVE_EXPAT
 #include    <expat.h>
@@ -25,7 +26,6 @@
 #define XML_STATUS_ERROR 0
 #endif
 
-#define BUFSIZE		20000
 #define SMALLBUF	1000
 #define NAMEBUF		100
 
@@ -590,7 +590,7 @@ static void characterDataHandler(void *userData, const char *s, int length)
 
 static Agraph_t *graphml_to_gv(char* gname, FILE * graphmlFile, int* rv)
 {
-    char buf[BUFSIZE];
+    char buf[BUFSIZ];
     int done;
     userdata_t *udata = genUserdata(gname);
     XML_Parser parser = XML_ParserCreate(NULL);
-- 
2.40.0