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SteerParser.cxx
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SteerParser.cxx
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/********************************************************************
*
* @Package: Plotter
*
* Class to parse steering files in C++. Classes have to be enclosed
* in curly brackets and start with <classname>. Example:
* SteerExample(){ .... };
* Steering blocks can also be named, e.g. SteerExample("default") and
* SteerExample("modify").
* The different versions of the class can then be obtained with
* GetSteer(TClass* cl) or GetSteer(TClass* cl, const char* name).
*
*******************************************************************/
#include <stdio.h>
#include <iostream>
#include <string.h>
#include <fstream>
#include <TClass.h>
#include <TROOT.h>
#include <RVersion.h>
#include <TObjString.h>
#include <TList.h>
#include <TSystem.h>
#include "SteerParser.h"
#include "BaseSteer.h"
using namespace std;
//__________________________________________________________
SteerParser::SteerParser()
: fFilename((Ssiz_t)1024),fNamespace((Ssiz_t)256),fClassname((Ssiz_t)1024), fObjectname((Ssiz_t)1024), fBlock((Ssiz_t)1024), fLine((Ssiz_t)1024),fInNamespace(kFALSE),fInBlock(kFALSE),fBraces(0),fArrayLength(0),fNameSpaces(0),fCurrentNameIndex(-1)
{
// constructor
}
//__________________________________________________________
SteerParser::~SteerParser()
{
// Deletes the list of steerings
fNameSpaces.Delete();
fSteerings.Delete();
}
//__________________________________________________________
void SteerParser::SetFilename(const char* filename)
{
// Searches for the file 'filename' in $PWD
char *tmpFileName = gSystem->ExpandPathName("$(PWD)/");
fFilename = tmpFileName;
delete tmpFileName;
if(fFilename !="/") {
fFilename.Append(filename);
cout <<"SteerParser: Searching for file "<< fFilename<<endl;
ifstream steer1(fFilename,ios::in);
if(!steer1.fail()) {
cout <<"SteerParser: File "<< fFilename<<" opened for reading"<<endl;
return;
}
}
cout <<"SteerParser: Could not find "<< filename
<<" . "<< endl;
return;
}
//__________________________________________________________
void SteerParser::SetClassname(const char* classname, const char* objectname)
{
//Set class name with optional object name argument
fClassname=classname;
fObjectname=objectname;
if(fObjectname=="")
cout <<"SteerParser: Classname set to "<< fClassname<<endl;
else
cout <<"SteerParser: Classname set to " << fClassname
<< "(\"" << fObjectname <<"\")" << endl;
}
//__________________________________________________________
Bool_t SteerParser::ParseFile(const char* filename)
{
// This method divides the steering file into blocks
// and creates BaseSteer objects for each block found.
// If no prior namespace sets the current namespace to the first found.
SetFilename( filename);
Bool_t status = kTRUE;
cout << "\n======== SteerParser: Reading from file '"<<fFilename<<"' ============="<<endl;
ifstream steer(fFilename,ios::in); // open steering file
if ( steer.is_open() ) {
TString line;
const Int_t numSteerBefore = fSteerings.GetEntriesFast();
while ( ! steer.eof() ) {
line.ReadLine( steer );
if ( (line.Length() == 0) || (line.BeginsWith("//")) ) continue;
RemoveComments(line);
RemoveWhiteSpace(line);
cout << "----- "<< line << endl; // we want to have that in log files
ParseLine(line);
}
if(fInNamespace){
Warning("ParseFile","missing closing brace of namespace %s!", fNamespace.Data());
}
Print(fFilename, numSteerBefore, fSteerings.GetLast()); // print summary at the end
} else { // steering file not open
Warning("ParseFile","Could not open steering file %s!\nWill use defaults!",filename);
status = kFALSE;
}
//cout << "======== SteerParser: Done reading from file '"<<fFilename<<"' ========\n"<<endl;
if(fCurrentNameIndex == -1) fCurrentNameIndex = (fNameSpaces.GetEntriesFast() ? 0 : -1);
return status;
}
//__________________________________________________________
Float_t SteerParser::ReadFloat(const char* keyword)
{
// Get value as a float
Int_t index;
Float_t val=0;
if(FindArrayInFile(keyword)) {
// Statement found
if ( ( index=fLine.Index(",") ) >= 0 ) {
TString value=fLine(0,index);// 0=beginning, index=length (not end!)
//convert value to a float
sscanf(value,"%f",&val);
// cout <<"keyword found " <<keyword<<" = "<<val<<endl;
return val;
}
}
return val;
}
//__________________________________________________________
Int_t SteerParser::ReadInt(const char* keyword)
{
// Get value as an int
Int_t index;
Int_t val=0;
if(FindArrayInFile(keyword)) {
// Statement found
if ( ( index=fLine.Index(",") ) >= 0 ) {
TString value=fLine(0,index);// 0=beginning, index=length (not end!)
//convert value to an int
sscanf(value,"%i",&val);
// cout <<"keyword found " <<keyword<<" = "<<val<<endl;
return val;
}
}
return val;
}
//__________________________________________________________
TString SteerParser::ReadString(const char* keyword)
{
// Get value as a string
Int_t index;
TString value("");
if(FindArrayInFile(keyword)) {
// Statement found
if ( ( index=fLine.Index(",") ) >= 0 ) {
value=fLine(0,index);// 0=beginning, index=length (not end!)
// cout <<"keyword found " <<keyword<<" = "<<value<<endl;
return value;
}
}
return value;
}
//__________________________________________________________
Int_t SteerParser::ReadArray(const char* keywordin,Float_t array[])
{
// Split line up into a list of floats and store results in array
TString value("");
Float_t val;
Int_t indarray=0;
Int_t index=0;
if(FindArrayInFile(keywordin)) {
// Statement found
while( fLine.Length()>0){
if ( ( index=fLine.Index(",") ) >= 0 ) {
value=fLine(0,index);// 0=beginning, index=length (not end!)
fLine = fLine(index+1,fLine.Length()-index-1); //reduce line
//convert value to a float
sscanf(value,"%f",&val);
array[indarray]=val;
if(indarray<fArrayLength)array[indarray]=val;
else if(fArrayLength>0) {
cout<<"SteerParser: Mismatch in declared and actual number of elements and for Array" <<keywordin<< endl;
cout<<"SteerParser: Array index=" <<indarray<<
", Array size=" <<fArrayLength<< endl;
}
// cout <<"found value" <<val<<endl;
indarray++;
}
}
}
if(indarray>0&&indarray<fArrayLength&&fArrayLength>0){
cout<<"SteerParser: Mismatch in declared and actual number of elements and for Array" <<keywordin<< endl;
cout<<"SteerParser: Array index=" <<indarray<<
", Array size" <<fArrayLength<< endl;
}
return fArrayLength;
}
//__________________________________________________________
Int_t SteerParser::ReadArray(const char* keywordin,Int_t array[])
{
// Split line up into a list of ints and store results in array
TString value("");
Int_t val;
Int_t indarray=0;
Int_t index=0;
if(FindArrayInFile(keywordin)) {
// Statement found
while( fLine.Length()>0){
if ( ( index=fLine.Index(",") ) >= 0 ) {
value=fLine(0,index);// 0=beginning, index=length (not end!)
fLine = fLine(index+1,fLine.Length()-index-1); //reduce line
//convert value to a float
sscanf(value,"%i",&val);
array[indarray]=val;
if(indarray<fArrayLength)array[indarray]=val;
else if(fArrayLength>0) {
cout<<"SteerParser: Mismatch in declared and actual number of elements and for Array" <<keywordin<< endl;
cout<<"SteerParser: Array index=" <<indarray<<
", Array size" <<fArrayLength<< endl;
}
// cout <<"found value" <<val<<endl;
indarray++;
}
}
}
if(indarray>0&&indarray<fArrayLength&&fArrayLength>0) {
cout<<"SteerParser: Mismatch in declared and actual number of elements and for Array" <<keywordin<< endl;
cout<<"SteerParser: Array index=" <<indarray<<
", Array size" <<fArrayLength<< endl;
}
return fArrayLength;
}
//__________________________________________________________
Int_t SteerParser::ReadArray(const char* keywordin, TObjArray& array, Bool_t checkNamespace)
{
// Split line up into a list of TObjStrings and store results in array
TString value("");
TObjArray val;
Int_t indarray=0;
Int_t index=0;
if(FindArrayInFile(keywordin, checkNamespace)) {
// Statement found
while( fLine.Length()>0){
if ( ( index=fLine.Index(",") ) >= 0 ) {
value=fLine(0,index);// 0=beginning, index=length (not end!)
fLine = fLine(index+1,fLine.Length()-index-1); //reduce line
value.ReplaceAll("};", "");
value.ReplaceAll("\"", "");
value.ReplaceAll(";", "");
val.AddLast(new TObjString(value));
indarray++;
}
}
}
array.Clear();
array.AddAll(&val);
if(indarray>0&&indarray<fArrayLength&&fArrayLength>0){
cout<<"SteerParser: Mismatch in declared and actual number of elements and for Array " <<keywordin<< endl;
cout<<"SteerParser: Array index=" <<indarray<<
", Array size" <<fArrayLength<< endl;
}
return fArrayLength;
}
//__________________________________________________________
void SteerParser::ReadFastArray(const char* keyword,Float_t array[])
{
// Put the array in the file into the array array.
TString Keyword(keyword);
fBraces=0;
Bool_t classfound=kFALSE;
if(fFilename=="") {
cout << "SteerParser: You must specify a file first with SetFilename()"<<endl;
return;
}
ifstream steer(fFilename,ios::in); // open steering file
if ( steer.is_open() ) {
while ( ! steer.eof() ) {
fLine.ReadLine( steer );
if ( (fLine.Length() == 0) || (fLine.BeginsWith("//")) ) continue;
RemoveComments(fLine);
RemoveWhiteSpace(fLine);
//Look for class heading
if(FindClassnameInLine(fLine)) {
// cout <<"SteerParser: Found class "<< fClassname <<endl;
classfound=kTRUE;
}
if(classfound) {
//Count braces to check we are still in class description
CountBraces(fLine);
if(FindKeywordInLine(fLine,Keyword)) {
// now know the array size, read in that many floats from the file.
Int_t counter = 0;
Float_t tmp = 0;
while(( counter != fArrayLength ) && ! steer.eof()){
steer >> tmp;
array[counter] = tmp;
counter++;
}
// We have read all the information so return
return;
}
// Keep these error messages
if(fBraces==0&&classfound) {
cout<<"SteerParser: Could not find variable "<<
keyword <<" in class "<<fClassname<<endl;
return;
}
}
}
if(!classfound) {
cout<<"SteerParser: Could not find class "<<fClassname
<<" with object "<<fObjectname<<endl;
return;
}
} else { // steering file not open
cout << "SteerParser: Could not open steering file "<<fFilename <<endl;
return;
}
cout <<"SteerParser:Could not find keyword "<<
keyword<< " in file " <<fFilename<<endl;
if(fBraces !=0) cout<<"SteerParser: Braces in file "<<
fFilename <<" don't match "<<fBraces<<endl;
return;
return;
}
//__________________________________________________________
void SteerParser::ReadFastArray(const char* keyword,Int_t array[])
{
TString Keyword(keyword);
fBraces=0;
Bool_t classfound=kFALSE;
if(fFilename=="") {
cout << "SteerParser: You must specify a file first with SetFilename()"<<endl;
return;
}
ifstream steer(fFilename,ios::in); // open steering file
if ( steer.is_open() ) {
while ( ! steer.eof() ) {
fLine.ReadLine( steer );
if ( (fLine.Length() == 0) || (fLine.BeginsWith("//")) ) continue;
RemoveComments(fLine);
RemoveWhiteSpace(fLine);
//Look for class heading
if(FindClassnameInLine(fLine)) {
// cout <<"SteerParser: Found class "<< fClassname <<endl;
classfound=kTRUE;
}
if(classfound) {
//Count braces to check we are still in class description
CountBraces(fLine);
if(FindKeywordInLine(fLine,Keyword)) {
// now know the array size, read in that many ints from the file.
Int_t counter = 0;
Int_t tmp = 0;
while(( counter != fArrayLength ) && ! steer.eof()){
steer >> tmp;
array[counter] = tmp;
counter++;
}
// We have read all the information so return
return;
}
// Keep these error messages
if(fBraces==0&&classfound) {
cout<<"SteerParser: Could not find variable "<<
keyword <<" in class "<<fClassname<<endl;
return;
}
}
}
if(!classfound) {
cout<<"SteerParser: Could not find class "<<fClassname
<<" with object "<<fObjectname<<endl;
return;
}
} else { // steering file not open
cout << "SteerParser: Could not open steering file "<<fFilename <<endl;
return;
}
cout <<"SteerParser:Could not find keyword "<<
keyword<< " in file " <<fFilename<<endl;
if(fBraces !=0) cout<<"SteerParser: Braces in file "<<
fFilename <<" don't match "<<fBraces<<endl;
return;
return;
}
//__________________________________________________________
Bool_t SteerParser::FindArrayInFile(const char* keywordin, Bool_t checkNamespace)
{
//
// Finds an array or single value in the steering file and stores numbers/strings
// separated by commas in fLine
//
// If(checkNamespace) only takes into account lines from the namespace 'fNamespace'
TString keyword(keywordin);
fBraces=0;
if(fFilename=="") {
Warning("FindArrayInFile","You must specify a file first with SetFilename()");
return kFALSE;
}
// cout << "\n======== SteerParser: Reading from file '"<<fFilename<<"' ============="<<endl;
ifstream steer(fFilename,ios::in); // open steering file
if ( steer.is_open() ) {
Bool_t classfound=kFALSE;
TList lines;
while ( ! steer.eof() ) {
TObjString *newLine = new TObjString;
newLine->String().ReadLine( steer );
lines.Add(newLine);
}
if(checkNamespace && !fNamespace.IsNull()) this->SelectNamespace(lines, fNamespace);
TIter nextLine(&lines);
while(TObject* line = nextLine()){
fLine = line->GetName(); // content of string
if ( (fLine.Length() == 0) || (fLine.BeginsWith("//")) ) continue;
RemoveComments(fLine);
RemoveWhiteSpace(fLine);
//Look for class heading
if(FindClassnameInLine(fLine)) {
classfound=kTRUE;
}
if(classfound) { // true for all lines after class has been found
//Count braces to check we are still in class description
CountBraces(fLine);
if(FindKeywordInLine(fLine,keyword)) {
//If line does not end in ';' Keep reading till we find it
while( ! LineEnd(fLine) ){
TObject* newNextLine = nextLine();
if(!newNextLine) break;
TString linetmp = newNextLine->GetName();
if ( (linetmp.Length() == 0)
|| (linetmp.BeginsWith("//")) ) continue;
RemoveComments(linetmp);
RemoveWhiteSpace(linetmp);
CountBraces(fLine);
fLine +=linetmp;
}
//line should now contain a list of strings
fLine +=","; //add comma to end of line to simplify string separations
// We have read all the information so return
return kTRUE;
}
// if block is closed and keyword not found print out an error
// second condition is needed when "SteerClass()" is on a line by itself
// if the steering has no name, line is just ')', else it's empty
if(fBraces==0 &&
! ( fLine.CompareTo(")")==0 || fLine.CompareTo("")==0 ) ) {
Warning("FindArrayInFile","Could not find variable %s in class %s",
keywordin,fClassname.Data());
return kFALSE;
}
}
}
lines.Delete();
if(!classfound) {
Warning("FindArrayInFile","Could not find class %s with object %s",
fClassname.Data(),fObjectname.Data());
return kFALSE;
}
} else { // steering file not open
Warning("FindArrayInFile","Could not open steering file %s",fFilename.Data());
return kFALSE;
}
Warning("FindArrayInFile","Could not find keyword %s in file %s",keywordin,fFilename.Data());
if(fBraces !=0)
Warning("FindArrayInFile","Braces in file %s don't match: %d",fFilename.Data(),fBraces);
return kFALSE;
}
//__________________________________________________________
Bool_t SteerParser::FindKeywordInLine(TString& line, const TString& keyword)
{
//
// Searches for a keyword in the line and returns the remainder of the line
// Returns false if line does not contain keyword
//
Int_t index;
TString keywordtest;
fArrayLength=0;
// if ( ! fInBlock ) { // we're not yet inside a block (enclosed in {})
if ( ( index=line.Index("=") ) >= 0 ) { // found a keyword = statement
// check charecters before "=" sign for compatibility with keyword
keywordtest = line(0,index);
if(keywordtest==keyword) {
line = line(index+1,line.Length()-index-1);
return kTRUE;
}
Int_t index1=line.Index("[");
Int_t index2=line.Index("]");
// perhaps we have an array with declared # elements (eg arr[99]= ...)
if ( index1>= 0 && index2>index1 ) {
// we have found the opening and closing braces
keywordtest = line(0,index1);
if(keywordtest==keyword) {
//Now read the string between the braces and convert into
// an integer which denotes the size of the array
TString arraylength=line(index1+1,index2-index1-1);
line = line(index+1,line.Length()-index-1);
//COnvert string to integer
if(arraylength.Length()>0) sscanf(arraylength,"%i",&fArrayLength);
else fArrayLength=0;
// cout <<"SteerParser: Array "<<keyword<<" found ";
// if(fArrayLength>0) cout << " with length " <<fArrayLength <<endl;
// else cout << " with unspecified length "<<endl;
return kTRUE;
}
}
}
return kFALSE;
}
//__________________________________________________________
Bool_t SteerParser::FindClassnameInLine(TString& line) const
{
//
// Searches line for a classname and object name (if specified) to match
// those given in fClassname and fObjectname
// class and object names are stripped so that line afterwards contains the
// remainder from ')' to the end
// Returns false if line does not contain classname and object name
//
Int_t index;
TString keywordtest;
if ( ( index=line.Index("(") ) >= 0 ) { // found a keyword ( statement
// check characters before "(" sign for compatibility with classname
keywordtest = line(0,index);
if(keywordtest==fClassname) {
line = line(index+1,line.Length()-index-1);
//no Object name specified so block is already found
if(fObjectname=="") return kTRUE;
//Now check Object name
else if ( line.Length()>2&&( index=line.Index(")") ) >= 0 ) {
// found a keyword ) statement
// Do not compare 1st +last elements as these contain " characters
keywordtest = line(1,index-2);
if(keywordtest==fObjectname) {
line = line(index+1,line.Length()-index-1);
return kTRUE;
}
}
}
}
return kFALSE;
}
//__________________________________________________________
Bool_t SteerParser::LineEnd(const TString& line) const
{
// true if line ends in a ';' symbol
return line.Index(";") >= 0 ? kTRUE : kFALSE;
}
//__________________________________________________________
TString SteerParser::ValueOfLine(const TString& line) const
{
//
// Copies the contents of a string until it reaches the ';' character
// This is usually the value of the parameter or for arrays a set
// of values separated by commas
//
Int_t index;
TString value("");
if ( ( index=line.Index(";") ) >= 0 ) { // Look for ';'
value = line(0,index);// 0=beginning, index=length (not end!)
}
else {
cout <<"SteerParser::ValueOfLine: line does not end with ;" << endl;
cout <<" Check Steering file " <<endl;
}
return value;
}
//__________________________________________________________
void SteerParser::ParseLine(TString& line)
{
// Splits lines into components, calls different methods
// according to the internal state
Int_t index;
// First try to find a namespace
if( ! fInNamespace ) {
if(line.BeginsWith("namespace")){
index = line.Index("{");
if(index == kNPOS) index = line.Length(); // '{' in next line, take care below
fNamespace = line(9, index - 9); // 9=beginning, index-9=length
if(fNamespace.Length()) {
if(!fNameSpaces.FindObject(fNamespace))
fNameSpaces.Add(new TObjString(fNamespace));
} else {
Warning("ParseLine", "Expect a name between 'namespace' and '{', use global!");
}
fInNamespace = kTRUE;
line = line(index+1,line.Length()-index-1); // rest after '{'
if ( line.Length() == 0 ) return; // line doesn't contain other parts else go on
}
} else if( ! fInBlock && line[0] == '}'){ // ending namespace
fNamespace = "";
fInNamespace = kFALSE;
if(line.Length() != 1) ParseLine(line.Remove(0, 1)); // parse the rest after '}'
return;
}
TString expression;
// now we can deal with the steerings
if ( ! fInBlock ) { // we're not yet inside a block (enclosed in {})
if(fInNamespace && line[0] == '{') { // assuming starting of namespace
// might be wrong, but than it is a wrong '{' anyway!
if(line.Length() == 1) return; // line doesn't contain other parts
else line.Remove(0, 1); // remove '{' and go on
}
if ( ( index=line.Index("(") ) >= 0 ) { // classname
fClassname = line(0,index); // 0=beginning, index=length (not end!)
line = line(index+1,line.Length()-index-1); // rest after '('
if ( line.Length() > 0 ) ParseLine(line); // line might contain other parts
} else if ( ( index=line.Index(")") ) >= 0 ) { // beginning of block
fInBlock = kTRUE;
if (index == 0){ // unnamed steering
line = line(index+1,line.Length()-index-1); // rest after ')'
if ( line.Length() > 0 ) ParseLine(line); // line might contain other parts
} else {
if (line[0]=='"' && line[index-1]=='"'){ // name in double ticks
fObjectname = line(1,index-2); // extract name
} else {
Warning("ParseLine",
"Expected a name like '%s' in quotation marks! Don't use a name...",
line(1,index-1).Data());
}
line = line(index+1,line.Length()-index-1); // rest after ')'
if ( line.Length() > 0 ) ParseLine(line); // line might contain other parts
}
} else {
Warning("ParseLine","Line '%s' makes no sense here! Skipping...",line.Data());
}
} else { // we're inside a block
Int_t indOpen = line.Index("{");
Int_t indClose = line.Index("}");
Int_t indSemi = line.Index(";");
if ( indOpen >= 0 && (indClose == kNPOS || indOpen < indClose)
&& (indSemi == kNPOS || indOpen < indSemi)) { // starting '{'
index = indOpen;
line = line(index+1,line.Length()-index-1); // rest after '{'
if ( line.Length() > 0 ) ParseLine(line); // line might contain other parts
} else if ( indSemi >= 0 && (indClose == kNPOS || indSemi < indClose)) { // expression
index = indSemi;
expression = line(0,index+1);
fBlock.Append(expression); // add expression to block
line = line(index+1,line.Length()-index-1); // rest after ';'
if ( line.Length() > 0 ) ParseLine(line); // line might contain other parts
} else if ( indClose >= 0 ) { // end of block
index = indClose;
CreateSteering(fClassname,fObjectname,fBlock,fNamespace);
fInBlock = kFALSE;
fBlock="";
fClassname="";
fObjectname="";
if(index < line.Length()-1){
line = line(index+1,line.Length()-index-1); // rest after '}'
ParseLine(line);
}
} else { // assume that expression is continued on next line
fBlock.Append(line); // add entire line to block
}
}
}
//__________________________________________________________
Bool_t SteerParser::CreateSteering(TString& theclassname, TString& objectname, TString& block, const char* nameSpace)
{
// Gets called by ParseLine when the closing brace of a block is found
// or might be directly called by a user
//
// First parameter is the classname of a concrete steering class
// e.g. BaseSteerCreateScatElec
//
// Second parameter is the name of the steering object
//
// Third parameter is a block of expressions to be evaluated by the
// concrete steering class
// e.g. 'value1=0.8; value2=4711; value3=42.0;' and so on...
//
// Optional fourth parameter is a namespace this steering should belong to.
// (Looking for namespace might cause trouble for very long strings IF this method
// was called 'standalone', because in the long string work around in BaseSteer::SetValues
// it is assumed that the correct classname etc. are in the corresponding data members
// of SteerParser.)
TClass *myclass;
RemoveWhiteSpace(theclassname);
RemoveWhiteSpace(objectname);
RemoveWhiteSpace(block);
myclass = gROOT->GetClass(theclassname);
if ( myclass ) {
BaseSteer *mysteer = static_cast<BaseSteer*>( myclass->New() );
mysteer->SetValues(block);
mysteer->SetName(objectname);
if(nameSpace) mysteer->SetTitle(nameSpace);
fSteerings.AddLast( mysteer );
return kTRUE;
} else {
Warning("CreateSteering","Cannot find steering class '%s'! Skipping...",
theclassname.Data() );
return kFALSE;
}
}
//__________________________________________________________
BaseSteer* SteerParser::GetSteer(TClass* cl)
{
// If a steering corresponding to class 'cl' and without a name
// is in the list of steerings, it is simply returned.
// But if namespaces are defined, a steering from that namespace is preferred
// to a steering without namespace, which is the 'fall back' solution.
//
// If no corresponding steering object exists, a default one is created
// and appended to the list of steerings. Default values are printed to
// screen.
BaseSteer* noNameSpaceSteer = NULL;
TIter next(&fSteerings);
while ( BaseSteer* steer = (BaseSteer*)next() ) {
if ( steer->IsA() == cl && strlen(steer->GetName()) == 0 ){// GetName never is NULL!
if(fCurrentNameIndex == -1){ // no namespace required
return steer;
} else {
const char* nameSpace = steer->GetTitle();
if(nameSpace && !strcmp(nameSpace, fNameSpaces[fCurrentNameIndex]->GetName())){
return steer;
} else if(!nameSpace || !strcmp(nameSpace, "")){// no namescpace of steering
noNameSpaceSteer = steer; //if no matching is found, take this without name
}
}
}
}
if(noNameSpaceSteer) return noNameSpaceSteer;
BaseSteer* thesteer = (BaseSteer*)cl->New();
cout << endl
<< "====== SteerParser: Using default values for class '"
<< cl->GetName()
<<"' ======\n";
thesteer->Print();
cout << "====== SteerParser: End of defaults for class '"
<< cl->GetName()
<<"' ===========\n"
<< endl;
fSteerings.AddLast(thesteer);
return thesteer; // return default object if not explicitly given in file
}
//__________________________________________________________
BaseSteer* SteerParser::GetSteer(TClass* cl, const char* name)
{
// If a steering corresponding to class 'cl' is in the list of steerings
// it is returned if the name matches.
// But if namespaces are defined, a steering from that namespace is preferred
// to a steering without namespace, which is the 'fall back' solution.
//
// If no corresponding steering object exists, NULL is returned.
BaseSteer* noNameSpaceSteer = NULL;
TIter next(&fSteerings);
while ( BaseSteer* steer = (BaseSteer*)next() ) {
if ( steer->IsA() == cl && !strcmp(steer->GetName(), name) ){
if(fCurrentNameIndex == -1){ // no namespace required
return steer;
} else {
const char* nameSpace = steer->GetTitle();
if(nameSpace && !strcmp(nameSpace, fNameSpaces[fCurrentNameIndex]->GetName())){
return steer;
} else if(!nameSpace || !strcmp(nameSpace, "")){// no namescpace of steering
noNameSpaceSteer = steer; //if no matching is found, take this without name
}
}
}
}
if(!noNameSpaceSteer)
Error("GetSteer", "No steering type %s with name %s!", cl->GetName(), name);
return noNameSpaceSteer; // maybe NULL
}
//__________________________________________________________
void SteerParser::RemoveComments(TString& line) const
{
// Removes comments from line (everything after '//')
Int_t index;
if ( ( index=line.Index("//") ) >= 0 ) { // line has comment
line = line(0,index);
}
}
//__________________________________________________________
void SteerParser::RemoveWhiteSpace(TString& line) const
{
// Removes all spaces and tabs from line
Int_t index;
while ( ( index=line.Index(" ") ) >= 0 ) { // space at position index
line = line.Remove(index,1);
}
while ( ( index=line.Index("\t") ) >= 0 ) { // tab at position index
line = line.Remove(index,1);
}
}
//__________________________________________________________
void SteerParser::CountBraces(TString & line)
{
//
// Counts and removes curly braces from line
// fBraces is the running total of open - close braces
// so fBraces=0 is a complete block
Int_t index;
while ( ( index=line.Index("{") ) >= 0 ) { // space at position index
line = line.Remove(index,1);
fBraces++;
}
while ( ( index=line.Index("}") ) >= 0 ) { // space at position index
line = line.Remove(index,1);
fBraces--;
}
}
//__________________________________________________________
Int_t SteerParser::GetNumSteerings(TClass* theclass)
{
// Returns the number of accepted steerings of type theclass
// (the method without argument returns the number of all accepted steerings)
Int_t i=0, num=0, max=fSteerings.GetEntriesFast();
for (i=0; i<max; ++i ){
if (fSteerings.UncheckedAt(i)->IsA() == theclass ) ++num;
}
return num;
}
//__________________________________________________________
void SteerParser::Print(Option_t* option) const
{
// Prints the given steering values to stdout, taking 'option' as filename if given
this->Print(option, 0, fSteerings.GetLast());
}
//__________________________________________________________
void SteerParser::Print(Option_t* option, Int_t first, Int_t last) const
{
// Prints the values of steerings 'first' to 'last' to stdout,
// taking 'option' as filename if given
last = TMath::Min(last, fSteerings.GetLast());
cout << "====== SteerParser: Accepted values";
if(option && strlen(option)) cout << " from file '" << option << "'";
cout << " ======" << endl;
if(fNameSpaces.GetEntriesFast() == 0){
for(Int_t i = first; i <= last; ++i) fSteerings[i]->Print();
} else {
for(Int_t i = 0; i < fNameSpaces.GetEntriesFast(); ++i){
cout << "\n ===== namespace '" << fNameSpaces[i]->GetName() << "':" << endl;
for(Int_t j = first; j <= last; ++j){
if(!strcmp(fSteerings[j]->GetTitle(), fNameSpaces[i]->GetName()))
fSteerings[j]->Print();
}
}
cout << "\n ===== without namespace:"<< endl;
for(Int_t j = first; j <= last; ++j){
if(!strcmp(fSteerings[j]->GetTitle(), "")) fSteerings[j]->Print();
}
}
}
//__________________________________________________________
Int_t SteerParser::NextNameSpace()
{
// switches to next 'namespace' of steerings
// 1 if success, 0 if no further 'namespace' (or no 'namespaces' given at all)
if(fCurrentNameIndex == -1) return 0;
if(++fCurrentNameIndex < fNameSpaces.GetEntriesFast()) return 1; // prefix increment!
fCurrentNameIndex = -1;
return 0;
}
//__________________________________________________________
const char* SteerParser::GetCurrentNameSpace() const
{
// giving name of namespace that steering objects currently need to belong to,
// if non required return NULL
if(fCurrentNameIndex == -1) return NULL;
else return fNameSpaces.At(fCurrentNameIndex)->GetName();
}
//__________________________________________________________
Bool_t SteerParser::SetCurrentNameSpace(const char* name)
{
// makes namespace 'name' the current one, kFALSE if no such namespace found
TObject* newNameSpace = fNameSpaces.FindObject(name); // it's a TObjString
if(newNameSpace){
fCurrentNameIndex = fNameSpaces.IndexOf(newNameSpace);
return kTRUE;
}else{
return kFALSE;
}
}
//__________________________________________________________
void SteerParser::SelectNamespace(TList& steerLines, const char* nameSpace) const
{
// SteerLines is assumed to contain TObjStrings containing lines read in from steerig file,
// removes all lines and part of lines that do not belong to the requested namespace.
Bool_t inNamespace = kFALSE;
Int_t nBraces = 0;