X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Floader.cpp;h=98a0234961d2029d0b665450a314c120bf90e35f;hb=256b44a5009467171af53316141277027bcc0ba4;hp=67668cdea1f5bc52b76c7c02c401fda501d9531e;hpb=a02c84384a101c0dec48b6aa2dee53bac4bbd034;p=libs%2Fdatafile.git diff --git a/source/loader.cpp b/source/loader.cpp index 67668cd..98a0234 100644 --- a/source/loader.cpp +++ b/source/loader.cpp @@ -1,60 +1,256 @@ -/* $Id$ - -This file is part of libmspdatafile -Copyright © 2006 Mikko Rasa, Mikkosoft Productions -Distributed under the LGPL -*/ - +#include +#include +#include "except.h" #include "loader.h" +#include "type.h" using namespace std; +namespace { + +int signature_match(char s, char a) +{ + if(s==a) + return 3; + if(s==Msp::DataFile::IntType::signature && a==Msp::DataFile::FloatType::signature) + return 1; + return 0; +} + +int signature_match(const string &st_sig, const string &act_sig) +{ + if(act_sig=="*") + return 1; + else if(act_sig.size()==2 && act_sig[1]=='*') + { + int match = 3; + for(auto i=st_sig.begin(); (i!=st_sig.end() && match); ++i) + match = min(match, signature_match(*i, act_sig[0])); + + return match; + } + else if(st_sig.size()==act_sig.size()) + { + int match = 3; + for(unsigned i=0; (i::const_iterator i=st.sub.begin(); i!=st.sub.end(); ++i) - load_statement(*i); + if(!actions) + throw logic_error("no actions"); + + for(const Statement &s: st.sub) + load_statement(s); + finish(); } -void Loader::load(Parser &p) +void Loader::load_direct(Parser &p, unsigned l) { + SetForScope set_parser(cur_parser, &p); + SetForScope set_level(cur_level, l); + while(p) { - Statement st=p.parse(); - if(st.valid) - load_statement(st); + const StatementKey *key = p.peek(l); + if(!key) + break; + + LoaderAction *act = find_action(*key); + if(act) + { + SetFlag set_direct(direct); + if(!p.parse_and_load(l, *this, *act)) + throw logic_error("direct load failed"); + } + else + load_statement(p.parse()); } } -Loader::~Loader() +void Loader::load_statement(const Statement &st) { - for(ActionMap::iterator i=actions.begin(); i!=actions.end(); ++i) - delete i->second; + SetForScope set_cst(cur_st, &st); + + try + { + StatementKey key(st.keyword, st.get_signature()); + + if(!aux_loaders.empty() && !has_action(key)) + { + for(Loader *l: aux_loaders) + if(l->has_action(key)) + return l->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 &e) + { + if(e.get_source()!=st.source) + throw data_error(st.source, st.line, e); + else + throw; + } + catch(const exception &e) + { + throw data_error(st.source, st.line, e); + } +} + +void Loader::load_sub_with(Loader &ldr) +{ + if(direct) + { + ldr.load_direct(*cur_parser, cur_level+1); + ldr.finish(); + } + else if(cur_st) + { + ldr.load(*cur_st); + sub_loaded = true; + } + else + throw logic_error("no current statement"); } -void Loader::add(const string &k, LoaderAction *a) +void Loader::set_actions(ActionMap &a) { - ActionMap::iterator i=actions.find(k); - if(i!=actions.end()) + 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()) { 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 StatementKey &key) const +{ + if(!actions) + return false; + + auto 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 +{ + if(!actions) + return 0; + + auto begin = actions->lower_bound(StatementKey(key.keyword, string())); + auto end = actions->upper_bound(StatementKey(key.keyword, "~")); + + if(begin==end) + throw unknown_keyword(key.keyword); + + LoaderAction *act = 0; + int match = 0; + for(auto i=begin; i!=end; ++i) + { + int m = signature_match(key.signature, i->first.signature); + if(m>match) + { + act = i->second; + match = m; + } + } + + if(!match) + throw invalid_signature(key.keyword, key.signature); + + return act; +} + +const string &Loader::get_source() const +{ + if(!cur_st) + throw logic_error("no current statement"); + return cur_st->source; +} + +const string &Loader::get_keyword() const +{ + if(!cur_st) + throw logic_error("no current statement"); + return cur_st->keyword; +} + + +Loader::ActionMap::~ActionMap() { - 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; + for(const auto &kvp: *this) + delete kvp.second; } } // namespace DataFile