freedreno/rnn: add schema validation

Now that all the schema validation issues are fixed, enable xml
validation according to stylesheet in rnn.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6107>

diff --git a/src/freedreno/rnn/rnn.c b/src/freedreno/rnn/rnn.c
index 4851e294afcf5dad8ec9474b85a7b5444028baea..5c6897e40b9cd507b9921401ba16cf180d78caed 100644 (file)
--- a/src/freedreno/rnn/rnn.c
+++ b/src/freedreno/rnn/rnn.c
@@ -866,6 +866,54 @@ static char * find_file(const char *file_orig)
        return fname;
 }
 
+static int validate_doc(struct rnndb *db, xmlDocPtr doc, xmlNodePtr database)
+{
+       /* find the schemaLocation property: */
+       xmlAttrPtr attr = database->properties;
+       const char *schema_name = NULL;
+       char *schema_path;
+
+       while (attr) {
+               if (!strcmp(attr->name, "schemaLocation")) {
+                       xmlNodePtr data = attr->children;
+                       schema_name = data->content;
+                       /* we expect this to look like <namespace url> schema.xsd.. I think
+                        * technically it is supposed to be just a URL, but that doesn't
+                        * quite match up to what we do.. Just skip over everything up to
+                        * and including the first whitespace character:
+                        */
+                       while (schema_name && (schema_name[0] != ' '))
+                               schema_name++;
+                       schema_name++;
+                       break;
+               }
+       }
+
+       if (!schema_name) {
+               rnn_err(db, "could not find schema.  Missing schemaLocation?");
+               return 0;
+       }
+
+       schema_path = find_file(schema_name);
+       if (!schema_path) {
+               rnn_err(db, "%s: couldn't find database file. Please set the env var RNN_PATH.\n", schema_name);
+               return 0;
+       }
+
+       xmlSchemaParserCtxtPtr parser = xmlSchemaNewParserCtxt(schema_path);
+       xmlSchemaPtr schema = xmlSchemaParse(parser);
+       xmlSchemaValidCtxtPtr validCtxt = xmlSchemaNewValidCtxt(schema);
+       int ret = xmlSchemaValidateDoc(validCtxt, doc);
+
+       xmlSchemaFreeValidCtxt(validCtxt);
+       xmlSchemaFree(schema);
+       xmlSchemaFreeParserCtxt(parser);
+
+       free(schema_path);
+
+       return ret;
+}
+
 void rnn_parsefile (struct rnndb *db, char *file_orig) {
        int i;
        char *fname;
@@ -893,6 +941,10 @@ void rnn_parsefile (struct rnndb *db, char *file_orig) {
                        rnn_err(db, "%s:%d: wrong top-level tag <%s>\n", fname, root->line, root->name);
                } else {
                        xmlNode *chain = root->children;
+                       if (validate_doc(db, doc, root)) {
+                               rnn_err(db, "%s: database file has errors\n", fname);
+                               return;
+                       }
                        while (chain) {
                                if (chain->type != XML_ELEMENT_NODE) {
                                } else if (!trytop(db, fname, chain) && !trydoc(db, fname, chain)) {