X-Git-Url: http://git.tdb.fi/?p=libs%2Fdatafile.git;a=blobdiff_plain;f=source%2Floader.cpp;h=997e7c9eec27f7f480c711291f6a47f997c7039e;hp=6da8599ba550e373828ea96af9bd81942216180c;hb=1a3b30ea35fbc19e56bbd35e4ee1811d8d5e02a4;hpb=b34b46788d69853eabdbbd9e71ca82f2f5c09df8 diff --git a/source/loader.cpp b/source/loader.cpp index 6da8599..997e7c9 100644 --- a/source/loader.cpp +++ b/source/loader.cpp @@ -1,11 +1,6 @@ -/* $Id$ - -This file is part of libmspdatafile -Copyright © 2006-2008, 2010 Mikko Rasa, Mikkosoft Productions -Distributed under the LGPL -*/ - -#include +#include +#include +#include "except.h" #include "loader.h" #include "type.h" @@ -29,7 +24,7 @@ bool signature_match(const string &st_sig, const string &act_sig) 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]) + if(!signature_match(*i, act_sig[0])) return false; return true; @@ -48,12 +43,19 @@ bool signature_match(const string &st_sig, const string &act_sig) } + namespace Msp { namespace DataFile { +Loader::Loader(): + cur_st(0), + direct(false), + check_sub_loads(false) +{ } + Loader::~Loader() { - for(ActionMap::iterator i = actions.begin(); i!=actions.end(); ++i) + for(ActionMap::iterator i=actions.begin(); i!=actions.end(); ++i) delete i->second; } @@ -61,53 +63,102 @@ void Loader::load(Parser &p) { while(p) { - Statement st = p.parse(); - if(st.valid) - load_statement(st); + if(p.peek(0)) + load_direct(p, 0); + else if(p) // Peek may have processed an __end, so recheck goodness + { + // Parse in raw mode so we can peek immediately after a mode change + Statement st = p.parse(true); + if(st.valid && !st.control) + load_statement(st); + } } finish(); } void Loader::load(const Statement &st) { - for(list::const_iterator i = st.sub.begin(); i!=st.sub.end(); ++i) + for(list::const_iterator i=st.sub.begin(); i!=st.sub.end(); ++i) load_statement(*i); finish(); } +void Loader::load_direct(Parser &p, unsigned l) +{ + SetForScope set_parser(cur_parser, &p); + SetForScope set_level(cur_level, l); + + while(p) + { + 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()); + } +} + void Loader::load_statement(const Statement &st) { - cur_st = &st; + SetForScope set_cst(cur_st, &st); try { - LoaderAction *act = find_action(ActionKey(st.keyword, st.get_signature())); + StatementKey key(st.keyword, st.get_signature()); + + if(!aux_loaders.empty() && !has_action(key)) + { + for(list::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(Exception &e) + catch(const data_error &) { - cur_st = 0; - if(!e.where()[0]) - e.at(st.get_location()); - throw; } - - cur_st = 0; + catch(const exception &e) + { + throw data_error(st.source, st.line, e); + } } void Loader::load_sub_with(Loader &ldr) { - if(!cur_st) - throw InvalidState("load_sub called without current statement"); - - ldr.load(*cur_st); + 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 &kwd, LoaderAction *act) { - ActionKey key(kwd, act->get_signature()); + StatementKey key(kwd, (act ? act->get_signature() : "*")); ActionMap::iterator i = actions.find(key); if(i!=actions.end()) { @@ -118,32 +169,47 @@ void Loader::add(const string &kwd, LoaderAction *act) actions[key] = act; } -LoaderAction *Loader::find_action(const ActionKey &key) const +void Loader::add_auxiliary_loader(Loader &ldr) +{ + aux_loaders.push_back(&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(signature_match(key.signature, i->first.signature)) + return true; + return false; +} + +LoaderAction *Loader::find_action(const StatementKey &key) const { - ActionMap::const_iterator begin = actions.lower_bound(ActionKey(key.keyword, string())); - ActionMap::const_iterator end = actions.upper_bound(ActionKey(key.keyword, "~")); + 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 KeyError("Unknown keyword", key.keyword); + 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 KeyError(format("Keyword '%s' does not accept signature '%s'", key.keyword, key.signature)); + 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 +const string &Loader::get_keyword() const { - if(keyword!=other.keyword) - return keywordkeyword; } } // namespace DataFile