From 7fbd454d9f70f0f0c0a0c27a7d541fed4d038c2a Mon Sep 17 00:00:00 2001
From: Nick Wellnhofer <wellnhofer@aevum.de>
Date: Tue, 21 Mar 2023 13:26:36 +0100
Subject: [PATCH] parser: Grow input buffer earlier when reading characters

Make more bytes available after invoking CUR_CHAR or NEXT.
---
 HTMLparser.c      | 2 +-
 parserInternals.c | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/HTMLparser.c b/HTMLparser.c
index 3bebda6e..b8b6bd23 100644
--- a/HTMLparser.c
+++ b/HTMLparser.c
@@ -411,7 +411,7 @@ htmlCurrentChar(xmlParserCtxtPtr ctxt, int *len) {
 	return(ctxt->token);
     }
 
-    if ((ctxt->input->end - ctxt->input->cur < 4) &&
+    if ((ctxt->input->end - ctxt->input->cur < INPUT_CHUNK) &&
         (xmlParserGrow(ctxt) < 0))
         return(0);
 
diff --git a/parserInternals.c b/parserInternals.c
index a06bb76a..52491505 100644
--- a/parserInternals.c
+++ b/parserInternals.c
@@ -527,7 +527,7 @@ xmlNextChar(xmlParserCtxtPtr ctxt)
 	return;
     }
 
-    if (ctxt->input->end - ctxt->input->cur < 4) {
+    if (ctxt->input->end - ctxt->input->cur < INPUT_CHUNK) {
         if (xmlParserGrow(ctxt) < 0)
             return;
         if (ctxt->input->cur >= ctxt->input->end)
@@ -674,7 +674,7 @@ xmlCurrentChar(xmlParserCtxtPtr ctxt, int *len) {
     if (ctxt->instate == XML_PARSER_EOF)
 	return(0);
 
-    if ((ctxt->input->end - ctxt->input->cur < 4) &&
+    if ((ctxt->input->end - ctxt->input->cur < INPUT_CHUNK) &&
         (xmlParserGrow(ctxt) < 0))
         return(0);