/*
- * Copyright 2006-2007 Adrian Thurston <thurston@cs.queensu.ca>
+ * Copyright 2006-2007 Adrian Thurston <thurston@complang.org>
*/
/* This file is part of Ragel.
#include "ragel.h"
#include "rlscan.h"
+#include "inputdata.h"
//#define LOG_TOKENS
SemiTerminated
};
+#ifdef _WIN32
+#define PATH_SEP '\\'
+#else
+#define PATH_SEP '/'
+#endif
+
/*
* The Scanner for Importing
}
}
-void Scanner::directToParser( Parser *toParser, char *tokFileName, int tokLine,
+void Scanner::directToParser( Parser *toParser, const char *tokFileName, int tokLine,
int tokColumn, int type, char *tokdata, int toklen )
{
InputLoc loc;
/* If no errors and we are at the bottom of the include stack (the
* source file listed on the command line) then write out the data. */
if ( includeDepth == 0 && machineSpec == 0 && machineName == 0 )
- xmlEscapeHost( output, ts, te-ts );
+ id.inputItems.tail->data.write( ts, te-ts );
}
/*
{
/* Maintain the error count. */
gblErrorCount += 1;
- cerr << fileName << ":" << line << ":" << column << ": ";
+ cerr << makeInputLoc( fileName, line, column ) << ": ";
return cerr;
}
-bool Scanner::recursiveInclude( char *inclFileName, char *inclSectionName )
+/* An approximate check for duplicate includes. Due to aliasing of files it's
+ * possible for duplicates to creep in. */
+bool Scanner::duplicateInclude( char *inclFileName, char *inclSectionName )
{
- for ( IncludeStack::Iter si = includeStack; si.lte(); si++ ) {
- if ( strcmp( si->fileName, inclFileName ) == 0 &&
- strcmp( si->sectionName, inclSectionName ) == 0 )
+ for ( IncludeHistory::Iter hi = parser->includeHistory; hi.lte(); hi++ ) {
+ if ( strcmp( hi->fileName, inclFileName ) == 0 &&
+ strcmp( hi->sectionName, inclSectionName ) == 0 )
{
return true;
}
lastnl = 0;
}
+void Scanner::handleMachine()
+{
+ /* Assign a name to the machine. */
+ char *machine = word;
+
+ if ( !importMachines && inclSectionTarg == 0 ) {
+ ignoreSection = false;
+
+ ParserDictEl *pdEl = id.parserDict.find( machine );
+ if ( pdEl == 0 ) {
+ pdEl = new ParserDictEl( machine );
+ pdEl->value = new Parser( fileName, machine, sectionLoc );
+ pdEl->value->init();
+ id.parserDict.insert( pdEl );
+ id.parserList.append( pdEl->value );
+ }
+
+ parser = pdEl->value;
+ }
+ else if ( !importMachines && strcmp( inclSectionTarg, machine ) == 0 ) {
+ /* found include target */
+ ignoreSection = false;
+ parser = inclToParser;
+ }
+ else {
+ /* ignoring section */
+ ignoreSection = true;
+ parser = 0;
+ }
+}
+
+void Scanner::handleInclude()
+{
+ if ( active() ) {
+ char *inclSectionName = word;
+ char **includeChecks = 0;
+
+ /* Implement defaults for the input file and section name. */
+ if ( inclSectionName == 0 )
+ inclSectionName = parser->sectionName;
+
+ if ( lit != 0 )
+ includeChecks = makeIncludePathChecks( fileName, lit, lit_len );
+ else {
+ char *test = new char[strlen(fileName)+1];
+ strcpy( test, fileName );
+
+ includeChecks = new char*[2];
+
+ includeChecks[0] = test;
+ includeChecks[1] = 0;
+ }
+
+ long found = 0;
+ ifstream *inFile = tryOpenInclude( includeChecks, found );
+ if ( inFile == 0 ) {
+ scan_error() << "include: failed to locate file" << endl;
+ char **tried = includeChecks;
+ while ( *tried != 0 )
+ scan_error() << "include: attempted: \"" << *tried++ << '\"' << endl;
+ }
+ else {
+ /* Don't include anything that's already been included. */
+ if ( !duplicateInclude( includeChecks[found], inclSectionName ) ) {
+ parser->includeHistory.append( IncludeHistoryItem(
+ includeChecks[found], inclSectionName ) );
+
+ Scanner scanner( id, includeChecks[found], *inFile, parser,
+ inclSectionName, includeDepth+1, false );
+ scanner.do_scan( );
+ delete inFile;
+ }
+ }
+ }
+}
+
+void Scanner::handleImport()
+{
+ if ( active() ) {
+ char **importChecks = makeIncludePathChecks( fileName, lit, lit_len );
+
+ /* Open the input file for reading. */
+ long found = 0;
+ ifstream *inFile = tryOpenInclude( importChecks, found );
+ if ( inFile == 0 ) {
+ scan_error() << "import: could not open import file " <<
+ "for reading" << endl;
+ char **tried = importChecks;
+ while ( *tried != 0 )
+ scan_error() << "import: attempted: \"" << *tried++ << '\"' << endl;
+ }
+
+ Scanner scanner( id, importChecks[found], *inFile, parser,
+ 0, includeDepth+1, true );
+ scanner.do_scan( );
+ scanner.importToken( 0, 0, 0 );
+ scanner.flushImport();
+ delete inFile;
+ }
+}
+
%%{
machine section_parse;
action import_err { scan_error() << "bad import statement" << endl; }
action write_err { scan_error() << "bad write statement" << endl; }
- action handle_machine
- {
- /* Assign a name to the machine. */
- char *machine = word;
-
- if ( !importMachines && inclSectionTarg == 0 ) {
- ignoreSection = false;
-
- ParserDictEl *pdEl = parserDict.find( machine );
- if ( pdEl == 0 ) {
- pdEl = new ParserDictEl( machine );
- pdEl->value = new Parser( fileName, machine, sectionLoc );
- pdEl->value->init();
- parserDict.insert( pdEl );
- }
-
- parser = pdEl->value;
- }
- else if ( !importMachines && strcmp( inclSectionTarg, machine ) == 0 ) {
- /* found include target */
- ignoreSection = false;
- parser = inclToParser;
- }
- else {
- /* ignoring section */
- ignoreSection = true;
- parser = 0;
- }
- }
+ action handle_machine { handleMachine(); }
+ action handle_include { handleInclude(); }
+ action handle_import { handleImport(); }
machine_stmt =
( KW_Machine TK_Word @store_word ';' ) @handle_machine
<>err mach_err <>eof mach_err;
- action handle_include
- {
- if ( active() ) {
- char *inclSectionName = word;
- char *inclFileName = 0;
-
- /* Implement defaults for the input file and section name. */
- if ( inclSectionName == 0 )
- inclSectionName = parser->sectionName;
-
- if ( lit != 0 )
- inclFileName = prepareFileName( lit, lit_len );
- else
- inclFileName = fileName;
-
- /* Check for a recursive include structure. Add the current file/section
- * name then check if what we are including is already in the stack. */
- includeStack.append( IncludeStackItem( fileName, parser->sectionName ) );
-
- if ( recursiveInclude( inclFileName, inclSectionName ) )
- scan_error() << "include: this is a recursive include operation" << endl;
- else {
- /* Open the input file for reading. */
- ifstream *inFile = new ifstream( inclFileName );
- if ( ! inFile->is_open() ) {
- scan_error() << "include: could not open " <<
- inclFileName << " for reading" << endl;
- }
-
- Scanner scanner( inclFileName, *inFile, output, parser,
- inclSectionName, includeDepth+1, false );
- scanner.do_scan( );
- delete inFile;
- }
-
- /* Remove the last element (len-1) */
- includeStack.remove( -1 );
- }
- }
-
include_names = (
TK_Word @store_word ( TK_Literal @store_lit )? |
TK_Literal @store_lit
( KW_Include include_names ';' ) @handle_include
<>err incl_err <>eof incl_err;
- action handle_import
- {
- if ( active() ) {
- char *importFileName = prepareFileName( lit, lit_len );
-
- /* Open the input file for reading. */
- ifstream *inFile = new ifstream( importFileName );
- if ( ! inFile->is_open() ) {
- scan_error() << "import: could not open " <<
- importFileName << " for reading" << endl;
- }
-
- Scanner scanner( importFileName, *inFile, output, parser,
- 0, includeDepth+1, true );
- scanner.do_scan( );
- scanner.importToken( 0, 0, 0 );
- scanner.flushImport();
- delete inFile;
- }
- }
-
import_stmt =
( KW_Import TK_Literal @store_lit ';' ) @handle_import
<>err import_err <>eof import_err;
action write_command
{
if ( active() && machineSpec == 0 && machineName == 0 ) {
- output << "<write"
- " def_name=\"" << parser->sectionName << "\""
- " line=\"" << line << "\""
- " col=\"" << column << "\""
- ">";
+ InputItem *inputItem = new InputItem;
+ inputItem->type = InputItem::Write;
+ inputItem->loc.line = line;
+ inputItem->loc.col = column;
+ inputItem->name = parser->sectionName;
+ inputItem->pd = parser->pd;
+ id.inputItems.append( inputItem );
}
}
action write_arg
{
if ( active() && machineSpec == 0 && machineName == 0 )
- output << "<arg>" << tokdata << "</arg>";
+ id.inputItems.tail->writeArgs.append( strdup(tokdata) );
}
action write_close
{
if ( active() && machineSpec == 0 && machineName == 0 )
- output << "</write>\n";
+ id.inputItems.tail->writeArgs.append( 0 );
}
write_stmt =
void Scanner::processToken( int type, char *tokdata, int toklen )
{
int *p, *pe, *eof;
-
if ( type < 0 )
p = pe = eof = 0;
{
parserExistsError = false;
- if ( includeDepth == 0 ) {
- if ( machineSpec == 0 && machineName == 0 )
- output << "</host>\n";
- }
-
sectionLoc.fileName = fileName;
sectionLoc.line = line;
- sectionLoc.col = 0;
+ sectionLoc.col = column;
}
void Scanner::endSection( )
InputLoc loc;
loc.fileName = fileName;
loc.line = line;
- loc.col = 0;
+ loc.col = column;
parser->token( loc, TK_EndSection, 0, 0 );
}
if ( machineSpec == 0 && machineName == 0 ) {
/* The end section may include a newline on the end, so
* we use the last line, which will count the newline. */
- output << "<host line=\"" << line << "\">";
+ InputItem *inputItem = new InputItem;
+ inputItem->type = InputItem::HostData;
+ inputItem->loc.line = line;
+ inputItem->loc.col = column;
+ id.inputItems.append( inputItem );
}
}
}
+bool isAbsolutePath( const char *path )
+{
+#ifdef _WIN32
+ return isalpha( path[0] ) && path[1] == ':' && path[2] == '\\';
+#else
+ return path[0] == '/';
+#endif
+}
+
+char **Scanner::makeIncludePathChecks( const char *thisFileName,
+ const char *fileName, int fnlen )
+{
+ char **checks = new char*[2];
+ long nextCheck = 0;
+
+ bool caseInsensitive = false;
+ long length = 0;
+ char *data = prepareLitString( InputLoc(), fileName, fnlen,
+ length, caseInsensitive );
+
+ /* Absolute path? */
+ if ( isAbsolutePath( data ) )
+ checks[nextCheck++] = data;
+ else {
+ /* Search from the the location of the current file. */
+ const char *lastSlash = strrchr( thisFileName, PATH_SEP );
+ if ( lastSlash == 0 )
+ checks[nextCheck++] = data;
+ else {
+ long givenPathLen = (lastSlash - thisFileName) + 1;
+ long checklen = givenPathLen + length;
+ char *check = new char[checklen+1];
+ memcpy( check, thisFileName, givenPathLen );
+ memcpy( check+givenPathLen, data, length );
+ check[checklen] = 0;
+ checks[nextCheck++] = check;
+ }
+
+ /* Search from the include paths given on the command line. */
+ for ( ArgsVector::Iter incp = id.includePaths; incp.lte(); incp++ ) {
+ long pathLen = strlen( *incp );
+ long checkLen = pathLen + 1 + length;
+ char *check = new char[checkLen+1];
+ memcpy( check, *incp, pathLen );
+ check[pathLen] = PATH_SEP;
+ memcpy( check+pathLen+1, data, length );
+ check[checkLen] = 0;
+ checks[nextCheck++] = check;
+ }
+ }
+
+ checks[nextCheck] = 0;
+ return checks;
+}
+
+ifstream *Scanner::tryOpenInclude( char **pathChecks, long &found )
+{
+ char **check = pathChecks;
+ ifstream *inFile = new ifstream;
+
+ while ( *check != 0 ) {
+ inFile->open( *check );
+ if ( inFile->is_open() ) {
+ found = check - pathChecks;
+ return inFile;
+ }
+ check += 1;
+ }
+
+ found = -1;
+ delete inFile;
+ return 0;
+}
+
%%{
machine rlscan;
# Parser definitions.
parser_def := |*
+ 'length_cond' => { token( KW_Length ); };
'machine' => { token( KW_Machine ); };
'include' => { token( KW_Include ); };
'import' => { token( KW_Import ); };
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