Support custom action maps in loader classes

[libs/datafile.git] / source / loader.cpp

diff --git a/source/loader.cpp b/source/loader.cpp
index 55492b66ce9dd04d3bed6ab211e990faafc9b6a3..51e22edf7a8e47c4ea1b02a3b1077d14e34f1f6e 100644 (file)
--- a/source/loader.cpp
+++ b/source/loader.cpp
@@ -48,6 +48,7 @@ namespace Msp {
 namespace DataFile {
 
 Loader::Loader():
+       actions(0),
        cur_st(0),
        direct(false),
        check_sub_loads(false)
@@ -55,12 +56,15 @@ Loader::Loader():
 
 Loader::~Loader()
 {
-       for(ActionMap::iterator i=actions.begin(); i!=actions.end(); ++i)
+       for(ActionMap::iterator i=local_actions.begin(); i!=local_actions.end(); ++i)
                delete i->second;
 }
 
 void Loader::load(Parser &p)
 {
+       if(!actions)
+               throw logic_error("no actions");
+
        while(p)
        {
                if(p.peek(0))
@@ -78,6 +82,9 @@ void Loader::load(Parser &p)
 
 void Loader::load(const Statement &st)
 {
+       if(!actions)
+               throw logic_error("no actions");
+
        for(list<Statement>::const_iterator i=st.sub.begin(); i!=st.sub.end(); ++i)
                load_statement(*i);
        finish();
@@ -156,17 +163,30 @@ void Loader::load_sub_with(Loader &ldr)
                throw logic_error("no current statement");
 }
 
+void Loader::set_actions(ActionMap &a)
+{
+       if(actions)
+               throw logic_error("actions already set");
+
+       actions = &a;
+       if(a.empty())
+               init_actions();
+}
+
 void Loader::add(const string &kwd, LoaderAction *act)
 {
+       if(!actions)
+               actions = &local_actions;
+
        StatementKey key(kwd, (act ? act->get_signature() : "*"));
-       ActionMap::iterator i = actions.find(key);
-       if(i!=actions.end())
+       ActionMap::iterator i = actions->find(key);
+       if(i!=actions->end())
        {
                delete i->second;
                i->second = act;
        }
        else
-               actions[key] = act;
+               (*actions)[key] = act;
 }
 
 void Loader::add_auxiliary_loader(Loader &ldr)
@@ -176,8 +196,11 @@ void Loader::add_auxiliary_loader(Loader &ldr)
 
 bool Loader::has_action(const StatementKey &key) const
 {
-       ActionMap::const_iterator i = actions.lower_bound(StatementKey(key.keyword, string()));
-       for(; (i!=actions.end() && i->first.keyword==key.keyword); ++i)
+       if(!actions)
+               return false;
+
+       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;
@@ -185,8 +208,11 @@ bool Loader::has_action(const StatementKey &key) const
 
 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(!actions)
+               return 0;
+
+       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);