parser: Use size_t when subtracting input buffer pointers

Avoid integer overflows.

2 files changed, 4 insertions, 3 deletions

diff --git a/HTMLparser.c b/HTMLparser.c
index 3b179120..ae84e59b 100644
--- a/HTMLparser.c
+++ b/HTMLparser.c
@@ -3875,7 +3875,7 @@ htmlCheckEncodingDirect(htmlParserCtxtPtr ctxt, const xmlChar *encoding) {
 	    (ctxt->input->buf->raw != NULL) &&
 	    (ctxt->input->buf->buffer != NULL)) {
 	    int nbchars;
-	    int processed;
+	    size_t processed;
 
 	    /*
 	     * convert as much as possible to the parser reading buffer.
diff --git a/parser.c b/parser.c
index 4fee512a..556c8366 100644
--- a/parser.c
+++ b/parser.c
@@ -9350,7 +9350,7 @@ xmlParseStartTag2(xmlParserCtxtPtr ctxt, const xmlChar **pref,
     int maxatts = ctxt->maxatts;
     int nratts, nbatts, nbdef, inputid;
     int i, j, nbNs, attval;
-    unsigned long cur;
+    size_t cur;
     int nsNr = ctxt->nsNr;
 
     if (RAW != '<') return(NULL);
@@ -11422,7 +11422,8 @@ xmlCheckCdataPush(const xmlChar *utf, int len, int complete) {
 static int
 xmlParseTryOrFinish(xmlParserCtxtPtr ctxt, int terminate) {
     int ret = 0;
-    int avail, tlen;
+    int tlen;
+    size_t avail;
     xmlChar cur, next;
 
     if (ctxt->input == NULL)