From ef8dc4f6735bcb5bd050518a7fdd656a2b6feaf9 Mon Sep 17 00:00:00 2001
From: Nick Wellnhofer <wellnhofer@aevum.de>
Date: Tue, 11 Jun 2024 14:58:55 +0200
Subject: [PATCH] schemas: Add callbacks for resource loader

---
 include/libxml/xmlschemas.h |  9 +++++++--
 xmlschemas.c                | 26 ++++++++++++++++++++++++++
 2 files changed, 33 insertions(+), 2 deletions(-)

diff --git a/include/libxml/xmlschemas.h b/include/libxml/xmlschemas.h
index c2af3d70..adaff3e3 100644
--- a/include/libxml/xmlschemas.h
+++ b/include/libxml/xmlschemas.h
@@ -18,6 +18,7 @@
 
 #include <stdio.h>
 #include <libxml/encoding.h>
+#include <libxml/parser.h>
 #include <libxml/tree.h>
 #include <libxml/xmlerror.h>
 
@@ -156,12 +157,16 @@ XMLPUBFUN void
 					 xmlStructuredErrorFunc serror,
 					 void *ctx);
 XMLPUBFUN int
-		xmlSchemaGetParserErrors(xmlSchemaParserCtxtPtr ctxt,
+	    xmlSchemaGetParserErrors	(xmlSchemaParserCtxtPtr ctxt,
 					xmlSchemaValidityErrorFunc * err,
 					xmlSchemaValidityWarningFunc * warn,
 					void **ctx);
+XMLPUBFUN void
+	    xmlSchemaSetResourceLoader	(xmlSchemaParserCtxtPtr ctxt,
+					 xmlResourceLoader loader,
+					 void *data);
 XMLPUBFUN int
-		xmlSchemaIsValid	(xmlSchemaValidCtxtPtr ctxt);
+	    xmlSchemaIsValid		(xmlSchemaValidCtxtPtr ctxt);
 
 XMLPUBFUN xmlSchemaPtr
 	    xmlSchemaParse		(xmlSchemaParserCtxtPtr ctxt);
diff --git a/xmlschemas.c b/xmlschemas.c
index 48b4e328..cae55fac 100644
--- a/xmlschemas.c
+++ b/xmlschemas.c
@@ -628,6 +628,9 @@ struct _xmlSchemaParserCtxt {
     xmlSchemaRedefPtr redef; /* Used for redefinitions. */
     int redefCounter; /* Used for redefinitions. */
     xmlSchemaItemListPtr attrProhibs;
+
+    xmlResourceLoader resourceLoader;
+    void *resourceCtxt;
 };
 
 /**
@@ -10506,6 +10509,9 @@ doc_load:
 
         if (pctxt->serror != NULL)
             xmlCtxtSetErrorHandler(parserCtxt, pctxt->serror, pctxt->errCtxt);
+        if (pctxt->resourceLoader != NULL)
+            xmlCtxtSetResourceLoader(parserCtxt, pctxt->resourceLoader,
+                                     pctxt->resourceCtxt);
 
 	if ((pctxt->dict != NULL) && (parserCtxt->dict != NULL)) {
 	    /*
@@ -21413,6 +21419,26 @@ xmlSchemaGetParserErrors(xmlSchemaParserCtxtPtr ctxt,
 	return(0);
 }
 
+/**
+ * xmlSchemaSetResourceLoader:
+ * @ctxt:  schema parser
+ * @loader:  resource loader
+ * @data:  user data which will be passed to the loader
+ *
+ * Register a callback function that will be called to load documents
+ * or external entities.
+ *
+ * Available since 2.14.0.
+ */
+void
+xmlSchemaSetResourceLoader(xmlSchemaParserCtxtPtr ctxt,
+                           xmlResourceLoader loader, void *data) {
+    if (ctxt == NULL)
+        return;
+    ctxt->resourceLoader = loader;
+    ctxt->resourceCtxt = data;
+}
+
 /**
  * xmlSchemaFacetTypeToString:
  * @type:  the facet type