X-Git-Url: http://git.tdb.fi/?p=libs%2Fdatafile.git;a=blobdiff_plain;f=source%2Floader.cpp;h=c2de4011232c93da747bfdead7df18af72c6087d;hp=c495c4cab71ed67b11d678e0cacaf02eec0bb312;hb=0d8df25704366f3576c417436c90fbac2e479632;hpb=4a728161f1a8a575ead2052acf67a0bdee237216

diff --git a/source/loader.cpp b/source/loader.cpp
index c495c4c..c2de401 100644
--- a/source/loader.cpp
+++ b/source/loader.cpp
@@ -1,3 +1,4 @@
+#include <msp/core/raii.h>
 #include <msp/strings/format.h>
 #include "dataerror.h"
 #include "loader.h"
@@ -7,16 +8,6 @@ using namespace std;
 
 namespace {
 
-template<typename T>
-struct Set
-{
-	T &ref;
-	T orig;
-
-	Set(T &r, const T &v): ref(r), orig(r) { r = v; }
-	~Set() { ref = orig; }
-};
-
 bool signature_match(char s, char a)
 {
 	if(s==a)
@@ -109,11 +100,20 @@ void Loader::load(const Statement &st)
 
 void Loader::load_statement(const Statement &st)
 {
-	Set<const Statement *> set_cst(cur_st, &st);
+	SetForScope<const Statement *> set_cst(cur_st, &st);
 
 	try
 	{
-		LoaderAction *act = find_action(ActionKey(st.keyword, st.get_signature()));
+		StatementKey key(st.keyword, st.get_signature());
+
+		if(!aux_loaders.empty() && !has_action(key))
+		{
+			for(list<Loader *>::const_iterator i=aux_loaders.begin(); i!=aux_loaders.end(); ++i)
+				if((*i)->has_action(key))
+					return (*i)->load_statement(st);
+		}
+
+		LoaderAction *act = find_action(key);
 		if(act)
 		{
 			sub_loaded = false;
@@ -143,7 +143,7 @@ void Loader::load_sub_with(Loader &ldr)
 
 void Loader::add(const string &kwd, LoaderAction *act)
 {
-	ActionKey key(kwd, (act ? act->get_signature() : "*"));
+	StatementKey key(kwd, (act ? act->get_signature() : "*"));
 	ActionMap::iterator i = actions.find(key);
 	if(i!=actions.end())
 	{
@@ -154,10 +154,24 @@ void Loader::add(const string &kwd, LoaderAction *act)
 		actions[key] = act;
 }
 
-LoaderAction *Loader::find_action(const ActionKey &key) const
+void Loader::add_auxiliary_loader(Loader &ldr)
+{
+	aux_loaders.push_back(&ldr);
+}
+
+bool Loader::has_action(const StatementKey &key) const
 {
-	ActionMap::const_iterator begin = actions.lower_bound(ActionKey(key.keyword, string()));
-	ActionMap::const_iterator end = actions.upper_bound(ActionKey(key.keyword, "~"));
+	ActionMap::const_iterator i = actions.lower_bound(StatementKey(key.keyword, string()));
+	for(; (i!=actions.end() && i->first.keyword==key.keyword); ++i)
+		if(signature_match(key.signature, i->first.signature))
+			return true;
+	return false;
+}
+
+LoaderAction *Loader::find_action(const StatementKey &key) const
+{
+	ActionMap::const_iterator begin = actions.lower_bound(StatementKey(key.keyword, string()));
+	ActionMap::const_iterator end = actions.upper_bound(StatementKey(key.keyword, "~"));
 
 	if(begin==end)
 		throw unknown_keyword(key.keyword);
@@ -176,18 +190,5 @@ const string &Loader::get_source() const
 	return cur_st->source;
 }
 
-
-Loader::ActionKey::ActionKey(const string &k, const string &s):
-	keyword(k),
-	signature(s)
-{ }
-
-bool Loader::ActionKey::operator<(const ActionKey &other) const
-{
-	if(keyword!=other.keyword)
-		return keyword<other.keyword;
-	return signature<other.signature;
-}
-
 } // namespace DataFile
 } // namespace Msp