handle typoed functions, etc with internal error message

Author: Kyle Maxwell

Makefile.am

@@ -44,4 +44,5 @@ check-am:
 	@echo "test..."; ./dexter -x test/test.dex test/test.xml | diff test/test.json - && echo "    success."
 	@echo "yelp..."; ./dexter test/yelp.dex test/yelp.html | diff test/yelp.json - && echo "    success."
 	@echo "optional..."; ./dexter test/optional.dex test/optional.html | diff test/optional.json - && echo "    success."
+	@echo "malformed-function..."; ./dexter test/malformed-function.dex test/malformed-function.html | diff test/malformed-function.json - && echo "    success."
 

Makefile.in

@@ -747,6 +747,7 @@ check-am:
 	@echo "test..."; ./dexter -x test/test.dex test/test.xml | diff test/test.json - && echo "    success."
 	@echo "yelp..."; ./dexter test/yelp.dex test/yelp.html | diff test/yelp.json - && echo "    success."
 	@echo "optional..."; ./dexter test/optional.dex test/optional.html | diff test/optional.json - && echo "    success."
+	@echo "malformed-function..."; ./dexter test/malformed-function.dex test/malformed-function.html | diff test/malformed-function.json - && echo "    success."
 # Tell versions [3.59,3.63) of GNU make to not export all variables.
 # Otherwise a system limit (for SysV at least) may be exceeded.
 .NOEXPORT:

dexter.c

@@ -145,6 +145,9 @@ parsedDexPtr dex_parse_doc(dexPtr dex, xmlDocPtr doc) {
   ptr->dex = dex;
   ptr->xml = xsltApplyStylesheet(dex->stylesheet, doc, NULL);
   if(ptr->xml != NULL && ptr->error == NULL) visit(ptr, ptr->xml->children, false);
+  if(ptr->xml == NULL && ptr->error == NULL) { // == NULL
+    ptr->error = strdup("Internal runtime error");
+  }
 	return ptr;
 }
 

dexter_main.c

@@ -123,6 +123,7 @@ int main (int argc, char **argv) {
 	}
 
 	parsedDexPtr ptr = dex_parse_file(compiled, arguments.input_file, !(arguments.input_xml));
+	
 	if(ptr->error != NULL) {
 		fprintf(stderr, "Parsing failed: %s\n", ptr->error);
 		exit(1);

test/malformed-function.dex

@@ -0,0 +1,8 @@
+{
+  "row(tr)": [
+    {
+      "class": "str:replace(td:nth-child(1), 'w', 'W')",
+      "default": "td:nth-child(3)"
+    }
+  ]
+}

test/malformed-function.html

@@ -0,0 +1 @@
+{}