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 void Loader::load(const Statement &st)
  16 {
  17         for(list<Statement>::const_iterator i=st.sub.begin(); i!=st.sub.end(); ++i)
  18                 load_statement(*i);
  19         finish();
  20 }
  21
  22 void Loader::load(Parser &p)
  23 {
  24         while(p)
  25         {
  26                 Statement st=p.parse();
  27                 if(st.valid)
  28                         load_statement(st);
  29         }
  30         finish();
  31 }
  32
  33 Loader::~Loader()
  34 {
  35         for(ActionMap::iterator i=actions.begin(); i!=actions.end(); ++i)
  36                 delete i->second;
  37 }
  38
  39 void Loader::load_sub_with(Loader &ldr)
  40 {
  41         if(!cur_st)
  42                 throw InvalidState("load_sub called without current statement");
  43
  44         ldr.load(*cur_st);
  45 }
  46
  47 void Loader::add(const string &k, LoaderAction *a)
  48 {
  49         ActionMap::iterator i=actions.find(k);
  50         if(i!=actions.end())
  51         {
  52                 delete i->second;
  53                 i->second=a;
  54         }
  55         else
  56                 actions[k]=a;
  57 }
  58
  59 void Loader::load_statement(const Statement &st)
  60 {
  61         cur_st=&st;
  62         ActionMap::iterator j=actions.find(st.keyword);
  63         if(j==actions.end())
  64                 throw_at(KeyError("Unknown keyword", st.keyword), st.get_location());
  65         if(j->second)
  66         {
  67                 try
  68                 {
  69                         j->second->execute(*this, st);
  70                 }
  71                 catch(Exception &e)
  72                 {
  73                         if(!e.where()[0])
  74                                 e.at(st.get_location());
  75                         throw;
  76                 }
  77         }
  78         cur_st=0;
  79 }
  80
  81 } // namespace DataFile
  82 } // namespace Msp