commit afad37216b7aaf6c4faf60cce7358a7bbc04c2b1
author Mike Dalessio <mike.dalessio@gmail.com> Sun Jan 31 09:53:56 2021 -0500
committer Nick Wellnhofer <wellnhofer@aevum.de> Mon Feb 08 17:14:35 2021 +0100
tree d5378097cdaa7fc3e3dc95e299fb841e5b2306ef
parent ec808a44156d2464ee0e604979bde794213f61ef

parser.c: shrink the input buffer when appropriate

Fixes GNOME/libxml2#200

Also see discussions at:
- GNOME/libxml2#192
- https://gitlab.gnome.org/nwellnhof/libxml2/-/commit/99bda1e
- https://github.com/sparklemotion/nokogiri/issues/2132

parser.c

diff --git a/parser.c b/parser.c
index a7bdc7f..efde672 100644
--- a/parser.c
+++ b/parser.c
@@ -4204,6 +4204,7 @@
 	}
 	count++;
 	if (count > 50) {
+	    SHRINK;
 	    GROW;
 	    count = 0;
             if (ctxt->instate == XML_PARSER_EOF) {
@@ -4291,6 +4292,7 @@
 	buf[len++] = cur;
 	count++;
 	if (count > 50) {
+	    SHRINK;
 	    GROW;
 	    count = 0;
             if (ctxt->instate == XML_PARSER_EOF) {
@@ -4571,6 +4573,7 @@
 	}
 	count++;
 	if (count > 50) {
+	    SHRINK;
 	    GROW;
 	    count = 0;
             if (ctxt->instate == XML_PARSER_EOF)
@@ -4776,6 +4779,7 @@
 
 	count++;
 	if (count > 50) {
+	    SHRINK;
 	    GROW;
 	    count = 0;
             if (ctxt->instate == XML_PARSER_EOF) {
@@ -5186,6 +5190,7 @@
 		}
 		count++;
 		if (count > 50) {
+		    SHRINK;
 		    GROW;
                     if (ctxt->instate == XML_PARSER_EOF) {
                         xmlFree(buf);
@@ -9783,6 +9788,7 @@
 	sl = l;
 	count++;
 	if (count > 50) {
+	    SHRINK;
 	    GROW;
             if (ctxt->instate == XML_PARSER_EOF) {
 		xmlFree(buf);