source/loader.cpp

   1 /* $Id$
   2
   3 This file is part of libmspdatafile
   4 Copyright © 2006-2008  Mikko Rasa, Mikkosoft Productions
   5 Distributed under the LGPL
   6 */
   7
   8 #include "loader.h"
   9
  10 using namespace std;
  11
  12 namespace Msp {
  13 namespace DataFile {
  14
  15 Loader::~Loader()
  16 {
  17         for(ActionMap::iterator i = actions.begin(); i!=actions.end(); ++i)
  18                 delete i->second;
  19 }
  20
  21 void Loader::load(Parser &p)
  22 {
  23         while(p)
  24         {
  25                 Statement st = p.parse();
  26                 if(st.valid)
  27                         load_statement(st);
  28         }
  29         finish();
  30 }
  31
  32 void Loader::load(const Statement &st)
  33 {
  34         for(list<Statement>::const_iterator i = st.sub.begin(); i!=st.sub.end(); ++i)
  35                 load_statement(*i);
  36         finish();
  37 }
  38
  39 void Loader::load_statement(const Statement &st)
  40 {
  41         cur_st = &st;
  42         ActionMap::iterator j = actions.find(st.keyword);
  43         if(j==actions.end())
  44                 throw_at(KeyError("Unknown keyword", st.keyword), st.get_location());
  45         if(j->second)
  46         {
  47                 try
  48                 {
  49                         j->second->execute(*this, st);
  50                 }
  51                 catch(Exception &e)
  52                 {
  53                         if(!e.where()[0])
  54                                 e.at(st.get_location());
  55                         throw;
  56                 }
  57         }
  58         cur_st = 0;
  59 }
  60
  61 void Loader::load_sub_with(Loader &ldr)
  62 {
  63         if(!cur_st)
  64                 throw InvalidState("load_sub called without current statement");
  65
  66         ldr.load(*cur_st);
  67 }
  68
  69 void Loader::add(const string &k, LoaderAction *a)
  70 {
  71         ActionMap::iterator i = actions.find(k);
  72         if(i!=actions.end())
  73         {
  74                 delete i->second;
  75                 i->second = a;
  76         }
  77         else
  78                 actions[k] = a;
  79 }
  80
  81 } // namespace DataFile
  82 } // namespace Msp