input/InputStream: migrate from class Error to C++ exceptions

src/lib/expat/ExpatParser.cxx

@@ -43,25 +43,21 @@ ExpatParser::Parse(const char *data, size_t length, bool is_final)
 		throw ExpatError(parser);
 }
 
-bool
-ExpatParser::Parse(InputStream &is, Error &error)
+void
+ExpatParser::Parse(InputStream &is)
 {
 	assert(is.IsReady());
 
 	while (true) {
 		char buffer[4096];
-		size_t nbytes = is.LockRead(buffer, sizeof(buffer), error);
+		size_t nbytes = is.LockRead(buffer, sizeof(buffer));
 		if (nbytes == 0)
 			break;
 
 		Parse(buffer, nbytes, false);
 	}
 
-	if (error.IsDefined())
-		return false;
-
 	Parse("", 0, true);
-	return true;
 }
 
 const char *

src/lib/expat/ExpatParser.hxx

@@ -66,7 +66,7 @@ public:
 
 	void Parse(const char *data, size_t length, bool is_final);
 
-	bool Parse(InputStream &is, Error &error);
+	void Parse(InputStream &is);
 
 	gcc_pure
 	static const char *GetAttribute(const XML_Char **atts,
@@ -97,8 +97,8 @@ public:
 		parser.Parse(data, length, is_final);
 	}
 
-	bool Parse(InputStream &is, Error &error) {
-		return parser.Parse(is, error);
+	void Parse(InputStream &is) {
+		parser.Parse(is);
 	}
 
 	gcc_pure