-/* $Id$
-
-This file is part of libmspdatafile
-Copyright © 2006 Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
+#include <msp/strings/format.h>
+#include "dataerror.h"
#include "loader.h"
+#include "type.h"
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)
+ return true;
+ if(s==Msp::DataFile::IntType::signature && a==Msp::DataFile::FloatType::signature)
+ return true;
+ return false;
+}
+
+bool signature_match(const string &st_sig, const string &act_sig)
+{
+ if(act_sig=="*")
+ return true;
+ else if(act_sig.size()==2 && act_sig[1]=='*')
+ {
+ for(string::const_iterator i=st_sig.begin(); i!=st_sig.end(); ++i)
+ if(*i!=act_sig[0])
+ return false;
+
+ return true;
+ }
+ else if(st_sig.size()==act_sig.size())
+ {
+ for(unsigned i=0; i<st_sig.size(); ++i)
+ if(!signature_match(st_sig[i], act_sig[i]))
+ return false;
+
+ return true;
+ }
+ else
+ return false;
+}
+
+}
+
+
namespace Msp {
namespace DataFile {
-void Loader::load(const Statement &st)
+class unknown_keyword: public runtime_error
{
- for(list<Statement>::const_iterator i=st.sub.begin(); i!=st.sub.end(); ++i)
- load_statement(*i);
- finish();
+public:
+ unknown_keyword(const std::string &k):
+ runtime_error(k)
+ { }
+
+ virtual ~unknown_keyword() throw() { }
+};
+
+
+class invalid_signature: public runtime_error
+{
+public:
+ invalid_signature(const std::string &k, const std::string &s):
+ runtime_error(format("%s %s", k, s))
+ { }
+
+ virtual ~invalid_signature() throw() { }
+};
+
+
+Loader::Loader():
+ cur_st(0),
+ check_sub_loads(false)
+{ }
+
+Loader::~Loader()
+{
+ for(ActionMap::iterator i=actions.begin(); i!=actions.end(); ++i)
+ delete i->second;
}
void Loader::load(Parser &p)
{
while(p)
{
- Statement st=p.parse();
+ Statement st = p.parse();
if(st.valid)
load_statement(st);
}
finish();
}
-Loader::~Loader()
+void Loader::load(const Statement &st)
{
- for(ActionMap::iterator i=actions.begin(); i!=actions.end(); ++i)
- delete i->second;
+ for(list<Statement>::const_iterator i=st.sub.begin(); i!=st.sub.end(); ++i)
+ load_statement(*i);
+ finish();
+}
+
+void Loader::load_statement(const Statement &st)
+{
+ Set<const Statement *> set_cst(cur_st, &st);
+
+ try
+ {
+ ActionKey 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;
+ act->execute(*this, st);
+ if(check_sub_loads && !st.sub.empty() && !sub_loaded)
+ throw logic_error("substatements ignored");
+ }
+ }
+ catch(const data_error &)
+ {
+ throw;
+ }
+ catch(const exception &e)
+ {
+ throw data_error(st.source, st.line, e);
+ }
+}
+
+void Loader::load_sub_with(Loader &ldr)
+{
+ if(!cur_st)
+ throw logic_error("no current statement");
+
+ ldr.load(*cur_st);
+ sub_loaded = true;
}
-void Loader::add(const string &k, LoaderAction *a)
+void Loader::add(const string &kwd, LoaderAction *act)
{
- ActionMap::iterator i=actions.find(k);
+ ActionKey key(kwd, (act ? act->get_signature() : "*"));
+ ActionMap::iterator i = actions.find(key);
if(i!=actions.end())
{
delete i->second;
- i->second=a;
+ i->second = act;
}
else
- actions[k]=a;
+ actions[key] = act;
}
-void Loader::load_statement(const Statement &st)
+void Loader::add_auxiliary_loader(Loader &ldr)
+{
+ aux_loaders.push_back(&ldr);
+}
+
+bool Loader::has_action(const ActionKey &key) const
+{
+ ActionMap::const_iterator i = actions.lower_bound(ActionKey(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 ActionKey &key) const
+{
+ ActionMap::const_iterator begin = actions.lower_bound(ActionKey(key.keyword, string()));
+ ActionMap::const_iterator end = actions.upper_bound(ActionKey(key.keyword, "~"));
+
+ if(begin==end)
+ throw unknown_keyword(key.keyword);
+
+ for(ActionMap::const_iterator i=begin; i!=end; ++i)
+ if(signature_match(key.signature, i->first.signature))
+ return i->second;
+
+ throw invalid_signature(key.keyword, key.signature);
+}
+
+const string &Loader::get_source() const
+{
+ if(!cur_st)
+ throw logic_error("no current statement");
+ 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
{
- cur_st=&st;
- ActionMap::iterator j=actions.find(st.keyword);
- if(j==actions.end())
- throw KeyError(st.get_location()+": Unknown keyword", st.keyword);
- if(j->second)
- j->second->execute(*this, st);
- cur_st=0;
+ if(keyword!=other.keyword)
+ return keyword<other.keyword;
+ return signature<other.signature;
}
} // namespace DataFile
projects / libs / datafile.git / blobdiff