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Diffstat (limited to 'ragel/cscodegen.cpp')
| -rw-r--r-- | ragel/cscodegen.cpp | 824 |
1 files changed, 824 insertions, 0 deletions
diff --git a/ragel/cscodegen.cpp b/ragel/cscodegen.cpp new file mode 100644 index 0000000..6de1506 --- /dev/null +++ b/ragel/cscodegen.cpp @@ -0,0 +1,824 @@ +/* + * Copyright 2001-2006 Adrian Thurston <thurston@complang.org> + * 2004 Erich Ocean <eric.ocean@ampede.com> + * 2005 Alan West <alan@alanz.com> + */ + +/* This file is part of Ragel. + * + * Ragel is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * Ragel is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with Ragel; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include "ragel.h" +#include "cscodegen.h" +#include "redfsm.h" +#include "gendata.h" +#include <sstream> +#include <iomanip> +#include <string> +#include <assert.h> + +using std::ostream; +using std::ostringstream; +using std::string; +using std::cerr; +using std::endl; + +using std::istream; +using std::ifstream; +using std::ostream; +using std::ios; +using std::cin; +using std::cout; +using std::cerr; +using std::endl; + +void csharpLineDirective( ostream &out, const char *fileName, int line ) +{ + if ( noLineDirectives ) + out << "/* "; + + /* Write the preprocessor line info for to the input file. */ + out << "#line " << line << " \""; + for ( const char *pc = fileName; *pc != 0; pc++ ) { + if ( *pc == '\\' ) + out << "\\\\"; + else + out << *pc; + } + out << '"'; + + if ( noLineDirectives ) + out << " */"; + + out << '\n'; +} + +void CSharpFsmCodeGen::genLineDirective( ostream &out ) +{ + std::streambuf *sbuf = out.rdbuf(); + output_filter *filter = static_cast<output_filter*>(sbuf); + csharpLineDirective( out, filter->fileName, filter->line + 1 ); +} + + +/* Init code gen with in parameters. */ +CSharpFsmCodeGen::CSharpFsmCodeGen( ostream &out ) +: + CodeGenData(out) +{ +} + +unsigned int CSharpFsmCodeGen::arrayTypeSize( unsigned long maxVal ) +{ + long long maxValLL = (long long) maxVal; + HostType *arrayType = keyOps->typeSubsumes( maxValLL ); + assert( arrayType != 0 ); + return arrayType->size; +} + +string CSharpFsmCodeGen::ARRAY_TYPE( unsigned long maxVal ) +{ + return ARRAY_TYPE( maxVal, false ); +} + +string CSharpFsmCodeGen::ARRAY_TYPE( unsigned long maxVal, bool forceSigned ) +{ + long long maxValLL = (long long) maxVal; + HostType *arrayType; + if (forceSigned) + arrayType = keyOps->typeSubsumes(true, maxValLL); + else + arrayType = keyOps->typeSubsumes( maxValLL ); + assert( arrayType != 0 ); + + string ret = arrayType->data1; + if ( arrayType->data2 != 0 ) { + ret += " "; + ret += arrayType->data2; + } + return ret; +} + +/* Write out the fsm name. */ +string CSharpFsmCodeGen::FSM_NAME() +{ + return fsmName; +} + +/* Emit the offset of the start state as a decimal integer. */ +string CSharpFsmCodeGen::START_STATE_ID() +{ + ostringstream ret; + ret << redFsm->startState->id; + return ret.str(); +}; + +/* Write out the array of actions. */ +std::ostream &CSharpFsmCodeGen::ACTIONS_ARRAY() +{ + out << "\t0, "; + int totalActions = 1; + for ( GenActionTableMap::Iter act = redFsm->actionMap; act.lte(); act++ ) { + /* Write out the length, which will never be the last character. */ + out << act->key.length() << ", "; + /* Put in a line break every 8 */ + if ( totalActions++ % 8 == 7 ) + out << "\n\t"; + + for ( GenActionTable::Iter item = act->key; item.lte(); item++ ) { + out << item->value->actionId; + if ( ! (act.last() && item.last()) ) + out << ", "; + + /* Put in a line break every 8 */ + if ( totalActions++ % 8 == 7 ) + out << "\n\t"; + } + } + out << "\n"; + return out; +} + + +string CSharpFsmCodeGen::ACCESS() +{ + ostringstream ret; + if ( accessExpr != 0 ) + INLINE_LIST( ret, accessExpr, 0, false ); + return ret.str(); +} + + +string CSharpFsmCodeGen::P() +{ + ostringstream ret; + if ( pExpr == 0 ) + ret << "p"; + else { + ret << "("; + INLINE_LIST( ret, pExpr, 0, false ); + ret << ")"; + } + return ret.str(); +} + +string CSharpFsmCodeGen::PE() +{ + ostringstream ret; + if ( peExpr == 0 ) + ret << "pe"; + else { + ret << "("; + INLINE_LIST( ret, peExpr, 0, false ); + ret << ")"; + } + return ret.str(); +} + +string CSharpFsmCodeGen::vEOF() +{ + ostringstream ret; + if ( eofExpr == 0 ) + ret << "eof"; + else { + ret << "("; + INLINE_LIST( ret, eofExpr, 0, false ); + ret << ")"; + } + return ret.str(); +} + +string CSharpFsmCodeGen::vCS() +{ + ostringstream ret; + if ( csExpr == 0 ) + ret << ACCESS() << "cs"; + else { + /* Emit the user supplied method of retrieving the key. */ + ret << "("; + INLINE_LIST( ret, csExpr, 0, false ); + ret << ")"; + } + return ret.str(); +} + +string CSharpFsmCodeGen::TOP() +{ + ostringstream ret; + if ( topExpr == 0 ) + ret << ACCESS() + "top"; + else { + ret << "("; + INLINE_LIST( ret, topExpr, 0, false ); + ret << ")"; + } + return ret.str(); +} + +string CSharpFsmCodeGen::STACK() +{ + ostringstream ret; + if ( stackExpr == 0 ) + ret << ACCESS() + "stack"; + else { + ret << "("; + INLINE_LIST( ret, stackExpr, 0, false ); + ret << ")"; + } + return ret.str(); +} + +string CSharpFsmCodeGen::ACT() +{ + ostringstream ret; + if ( actExpr == 0 ) + ret << ACCESS() + "act"; + else { + ret << "("; + INLINE_LIST( ret, actExpr, 0, false ); + ret << ")"; + } + return ret.str(); +} + +string CSharpFsmCodeGen::TOKSTART() +{ + ostringstream ret; + if ( tokstartExpr == 0 ) + ret << ACCESS() + "ts"; + else { + ret << "("; + INLINE_LIST( ret, tokstartExpr, 0, false ); + ret << ")"; + } + return ret.str(); +} + +string CSharpFsmCodeGen::TOKEND() +{ + ostringstream ret; + if ( tokendExpr == 0 ) + ret << ACCESS() + "te"; + else { + ret << "("; + INLINE_LIST( ret, tokendExpr, 0, false ); + ret << ")"; + } + return ret.str(); +} + +string CSharpFsmCodeGen::GET_WIDE_KEY() +{ + if ( redFsm->anyConditions() ) + return "_widec"; + else + return GET_KEY(); +} + +string CSharpFsmCodeGen::GET_WIDE_KEY( RedStateAp *state ) +{ + if ( state->stateCondList.length() > 0 ) + return "_widec"; + else + return GET_KEY(); +} + +string CSharpFsmCodeGen::GET_KEY() +{ + ostringstream ret; + if ( getKeyExpr != 0 ) { + /* Emit the user supplied method of retrieving the key. */ + ret << "("; + INLINE_LIST( ret, getKeyExpr, 0, false ); + ret << ")"; + } + else { + /* Expression for retrieving the key, use simple dereference. */ + ret << "(*" << P() << ")"; + } + return ret.str(); +} + +/* Write out level number of tabs. Makes the nested binary search nice + * looking. */ +string CSharpFsmCodeGen::TABS( int level ) +{ + string result; + while ( level-- > 0 ) + result += "\t"; + return result; +} + +/* Write out a key from the fsm code gen. Depends on wether or not the key is + * signed. */ +string CSharpFsmCodeGen::KEY( Key key ) +{ + ostringstream ret; + if ( keyOps->isSigned || !hostLang->explicitUnsigned ) + ret << key.getVal(); + else + ret << (unsigned long) key.getVal() << 'u'; + return ret.str(); +} + +string CSharpFsmCodeGen::ALPHA_KEY( Key key ) +{ + ostringstream ret; + if (key.getVal() > 0xFFFF) { + ret << key.getVal(); + } else { + if ( keyOps->alphType->isChar ) + ret << "'\\u" << std::hex << std::setw(4) << std::setfill('0') << key.getVal() << "'"; + else + ret << key.getVal(); + } + //ret << "(char) " << key.getVal(); + return ret.str(); +} + +void CSharpFsmCodeGen::EXEC( ostream &ret, GenInlineItem *item, int targState, int inFinish ) +{ + /* The parser gives fexec two children. The double brackets are for D + * code. If the inline list is a single word it will get interpreted as a + * C-style cast by the D compiler. */ + ret << "{" << P() << " = (("; + INLINE_LIST( ret, item->children, targState, inFinish ); + ret << "))-1;}"; +} + +void CSharpFsmCodeGen::LM_SWITCH( ostream &ret, GenInlineItem *item, + int targState, int inFinish ) +{ + ret << + " switch( " << ACT() << " ) {\n"; + + for ( GenInlineList::Iter lma = *item->children; lma.lte(); lma++ ) { + /* Write the case label, the action and the case break. */ + if ( lma->lmId < 0 ) + ret << " default:\n"; + else + ret << " case " << lma->lmId << ":\n"; + + /* Write the block and close it off. */ + ret << " {"; + INLINE_LIST( ret, lma->children, targState, inFinish ); + ret << "}\n"; + + ret << " break;\n"; + } + + ret << + " }\n" + "\t"; +} + +void CSharpFsmCodeGen::SET_ACT( ostream &ret, GenInlineItem *item ) +{ + ret << ACT() << " = " << item->lmId << ";"; +} + +void CSharpFsmCodeGen::SET_TOKEND( ostream &ret, GenInlineItem *item ) +{ + /* The tokend action sets tokend. */ + ret << TOKEND() << " = " << P(); + if ( item->offset != 0 ) + out << "+" << item->offset; + out << ";"; +} + +void CSharpFsmCodeGen::GET_TOKEND( ostream &ret, GenInlineItem *item ) +{ + ret << TOKEND(); +} + +void CSharpFsmCodeGen::INIT_TOKSTART( ostream &ret, GenInlineItem *item ) +{ + ret << TOKSTART() << " = " << NULL_ITEM() << ";"; +} + +void CSharpFsmCodeGen::INIT_ACT( ostream &ret, GenInlineItem *item ) +{ + ret << ACT() << " = 0;"; +} + +void CSharpFsmCodeGen::SET_TOKSTART( ostream &ret, GenInlineItem *item ) +{ + ret << TOKSTART() << " = " << P() << ";"; +} + +void CSharpFsmCodeGen::SUB_ACTION( ostream &ret, GenInlineItem *item, + int targState, bool inFinish ) +{ + if ( item->children->length() > 0 ) { + /* Write the block and close it off. */ + ret << "{"; + INLINE_LIST( ret, item->children, targState, inFinish ); + ret << "}"; + } +} + + +/* Write out an inline tree structure. Walks the list and possibly calls out + * to virtual functions than handle language specific items in the tree. */ +void CSharpFsmCodeGen::INLINE_LIST( ostream &ret, GenInlineList *inlineList, + int targState, bool inFinish ) +{ + for ( GenInlineList::Iter item = *inlineList; item.lte(); item++ ) { + switch ( item->type ) { + case GenInlineItem::Text: + ret << item->data; + break; + case GenInlineItem::Goto: + GOTO( ret, item->targState->id, inFinish ); + break; + case GenInlineItem::Call: + CALL( ret, item->targState->id, targState, inFinish ); + break; + case GenInlineItem::Next: + NEXT( ret, item->targState->id, inFinish ); + break; + case GenInlineItem::Ret: + RET( ret, inFinish ); + break; + case GenInlineItem::PChar: + ret << P(); + break; + case GenInlineItem::Char: + ret << GET_KEY(); + break; + case GenInlineItem::Hold: + ret << P() << "--;"; + break; + case GenInlineItem::Exec: + EXEC( ret, item, targState, inFinish ); + break; + case GenInlineItem::Curs: + CURS( ret, inFinish ); + break; + case GenInlineItem::Targs: + TARGS( ret, inFinish, targState ); + break; + case GenInlineItem::Entry: + ret << item->targState->id; + break; + case GenInlineItem::GotoExpr: + GOTO_EXPR( ret, item, inFinish ); + break; + case GenInlineItem::CallExpr: + CALL_EXPR( ret, item, targState, inFinish ); + break; + case GenInlineItem::NextExpr: + NEXT_EXPR( ret, item, inFinish ); + break; + case GenInlineItem::LmSwitch: + LM_SWITCH( ret, item, targState, inFinish ); + break; + case GenInlineItem::LmSetActId: + SET_ACT( ret, item ); + break; + case GenInlineItem::LmSetTokEnd: + SET_TOKEND( ret, item ); + break; + case GenInlineItem::LmGetTokEnd: + GET_TOKEND( ret, item ); + break; + case GenInlineItem::LmInitTokStart: + INIT_TOKSTART( ret, item ); + break; + case GenInlineItem::LmInitAct: + INIT_ACT( ret, item ); + break; + case GenInlineItem::LmSetTokStart: + SET_TOKSTART( ret, item ); + break; + case GenInlineItem::SubAction: + SUB_ACTION( ret, item, targState, inFinish ); + break; + case GenInlineItem::Break: + BREAK( ret, targState ); + break; + } + } +} +/* Write out paths in line directives. Escapes any special characters. */ +string CSharpFsmCodeGen::LDIR_PATH( char *path ) +{ + ostringstream ret; + for ( char *pc = path; *pc != 0; pc++ ) { + if ( *pc == '\\' ) + ret << "\\\\"; + else + ret << *pc; + } + return ret.str(); +} + +void CSharpFsmCodeGen::ACTION( ostream &ret, GenAction *action, int targState, bool inFinish ) +{ + /* Write the preprocessor line info for going into the source file. */ + csharpLineDirective( ret, action->loc.fileName, action->loc.line ); + + /* Write the block and close it off. */ + ret << "\t{"; + INLINE_LIST( ret, action->inlineList, targState, inFinish ); + ret << "}\n"; +} + +void CSharpFsmCodeGen::CONDITION( ostream &ret, GenAction *condition ) +{ + ret << "\n"; + csharpLineDirective( ret, condition->loc.fileName, condition->loc.line ); + INLINE_LIST( ret, condition->inlineList, 0, false ); +} + +string CSharpFsmCodeGen::ERROR_STATE() +{ + ostringstream ret; + if ( redFsm->errState != 0 ) + ret << redFsm->errState->id; + else + ret << "-1"; + return ret.str(); +} + +string CSharpFsmCodeGen::FIRST_FINAL_STATE() +{ + ostringstream ret; + if ( redFsm->firstFinState != 0 ) + ret << redFsm->firstFinState->id; + else + ret << redFsm->nextStateId; + return ret.str(); +} + +void CSharpFsmCodeGen::writeInit() +{ + out << " {\n"; + + if ( !noCS ) + out << "\t" << vCS() << " = " << START() << ";\n"; + + /* If there are any calls, then the stack top needs initialization. */ + if ( redFsm->anyActionCalls() || redFsm->anyActionRets() ) + out << "\t" << TOP() << " = 0;\n"; + + if ( hasLongestMatch ) { + out << + " " << TOKSTART() << " = " << NULL_ITEM() << ";\n" + " " << TOKEND() << " = " << NULL_ITEM() << ";\n" + " " << ACT() << " = 0;\n"; + } + out << " }\n"; +} + +string CSharpFsmCodeGen::DATA_PREFIX() +{ + if ( !noPrefix ) + return FSM_NAME() + "_"; + return ""; +} + +/* Emit the alphabet data type. */ +string CSharpFsmCodeGen::ALPH_TYPE() +{ + string ret = keyOps->alphType->data1; + if ( keyOps->alphType->data2 != 0 ) { + ret += " "; + ret += + keyOps->alphType->data2; + } + return ret; +} + +/* Emit the alphabet data type. */ +string CSharpFsmCodeGen::WIDE_ALPH_TYPE() +{ + string ret; + if ( redFsm->maxKey <= keyOps->maxKey ) + ret = ALPH_TYPE(); + else { + long long maxKeyVal = redFsm->maxKey.getLongLong(); + HostType *wideType = keyOps->typeSubsumes( keyOps->isSigned, maxKeyVal ); + assert( wideType != 0 ); + + ret = wideType->data1; + if ( wideType->data2 != 0 ) { + ret += " "; + ret += wideType->data2; + } + } + return ret; +} + +void CSharpFsmCodeGen::STATE_IDS() +{ + if ( redFsm->startState != 0 ) + STATIC_VAR( "int", START() ) << " = " << START_STATE_ID() << ";\n"; + + if ( !noFinal ) + STATIC_VAR( "int" , FIRST_FINAL() ) << " = " << FIRST_FINAL_STATE() << ";\n"; + + if ( !noError ) + STATIC_VAR( "int", ERROR() ) << " = " << ERROR_STATE() << ";\n"; + + out << "\n"; + + if ( entryPointNames.length() > 0 ) { + for ( EntryNameVect::Iter en = entryPointNames; en.lte(); en++ ) { + STATIC_VAR( "int", DATA_PREFIX() + "en_" + *en ) << + " = " << entryPointIds[en.pos()] << ";\n"; + } + out << "\n"; + } +} + + +void CSharpFsmCodeGen::writeStart() +{ + out << START_STATE_ID(); +} + +void CSharpFsmCodeGen::writeFirstFinal() +{ + out << FIRST_FINAL_STATE(); +} + +void CSharpFsmCodeGen::writeError() +{ + out << ERROR_STATE(); +} + +/* + * C# Specific + */ +string CSharpCodeGen::GET_KEY() +{ + ostringstream ret; + if ( getKeyExpr != 0 ) { + /* Emit the user supplied method of retrieving the key. */ + ret << "("; + INLINE_LIST( ret, getKeyExpr, 0, false ); + ret << ")"; + } + else { + /* Expression for retrieving the key, use simple dereference. */ + if ( dataExpr == 0 ) + ret << "data"; + else + INLINE_LIST( ret, dataExpr, 0, false ); + + ret << "[" << P() << "]"; + } + return ret.str(); +} +string CSharpCodeGen::NULL_ITEM() +{ + return "-1"; +} + +string CSharpCodeGen::POINTER() +{ + // XXX C# has no pointers + // multiple items seperated by commas can also be pointer types. + return " "; +} + +string CSharpCodeGen::PTR_CONST() +{ + return ""; +} + +std::ostream &CSharpCodeGen::OPEN_ARRAY( string type, string name ) +{ + out << "static readonly " << type << "[] " << name << " = "; + /* + if (type == "char") + out << "Encoding.ASCII.Get"; + else */ + out << "new " << type << " [] {\n"; + return out; +} + +std::ostream &CSharpCodeGen::CLOSE_ARRAY() +{ + return out << "};\n"; +} + +std::ostream &CSharpCodeGen::STATIC_VAR( string type, string name ) +{ + out << "const " << type << " " << name; + return out; +} + +string CSharpCodeGen::ARR_OFF( string ptr, string offset ) +{ + // XXX C# can't do pointer arithmetic + return "&" + ptr + "[" + offset + "]"; +} + +string CSharpCodeGen::CAST( string type ) +{ + return "(" + type + ")"; +} + +string CSharpCodeGen::UINT( ) +{ + return "uint"; +} + +std::ostream &CSharpCodeGen::SWITCH_DEFAULT() +{ + out << " default: break;\n"; + return out; +} + +string CSharpCodeGen::CTRL_FLOW() +{ + return "if (true) "; +} + +void CSharpCodeGen::writeExports() +{ + if ( exportList.length() > 0 ) { + for ( ExportList::Iter ex = exportList; ex.lte(); ex++ ) { + out << "const " << ALPH_TYPE() << " " << DATA_PREFIX() << + "ex_" << ex->name << " = " << KEY(ex->key) << ";\n"; + } + out << "\n"; + } +} + +/* + * End C#-specific code. + */ + +void CSharpFsmCodeGen::finishRagelDef() +{ + if ( codeStyle == GenGoto || codeStyle == GenFGoto || + codeStyle == GenIpGoto || codeStyle == GenSplit ) + { + /* For directly executable machines there is no required state + * ordering. Choose a depth-first ordering to increase the + * potential for fall-throughs. */ + redFsm->depthFirstOrdering(); + } + else { + /* The frontend will do this for us, but it may be a good idea to + * force it if the intermediate file is edited. */ + redFsm->sortByStateId(); + } + + /* Choose default transitions and the single transition. */ + redFsm->chooseDefaultSpan(); + + /* Maybe do flat expand, otherwise choose single. */ + if ( codeStyle == GenFlat || codeStyle == GenFFlat ) + redFsm->makeFlat(); + else + redFsm->chooseSingle(); + + /* If any errors have occured in the input file then don't write anything. */ + if ( gblErrorCount > 0 ) + return; + + if ( codeStyle == GenSplit ) + redFsm->partitionFsm( numSplitPartitions ); + + if ( codeStyle == GenIpGoto || codeStyle == GenSplit ) + redFsm->setInTrans(); + + /* Anlayze Machine will find the final action reference counts, among + * other things. We will use these in reporting the usage + * of fsm directives in action code. */ + analyzeMachine(); + + /* Determine if we should use indicies. */ + calcIndexSize(); +} + +ostream &CSharpFsmCodeGen::source_warning( const InputLoc &loc ) +{ + cerr << sourceFileName << ":" << loc.line << ":" << loc.col << ": warning: "; + return cerr; +} + +ostream &CSharpFsmCodeGen::source_error( const InputLoc &loc ) +{ + gblErrorCount += 1; + assert( sourceFileName != 0 ); + cerr << sourceFileName << ":" << loc.line << ":" << loc.col << ": "; + return cerr; +} + |