// @(#)root/rint:$Name: $:$Id: TTabCom.cxx,v 1.14 2002/07/29 09:20:26 rdm Exp $
// Author: Christian Lacunza <lacunza@cdfsg6.lbl.gov> 27/04/99
/*************************************************************************
* Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *
* All rights reserved. *
* *
* For the licensing terms see $ROOTSYS/LICENSE. *
* For the list of contributors see $ROOTSYS/README/CREDITS. *
*************************************************************************/
////////////////////////////////////////////////////////////////////////////
// //
// TTabCom //
// //
// This class performs basic tab completion. //
// You should be able to hit [TAB] to complete a partially typed: //
// //
// username //
// environment variable //
// preprocessor directive //
// pragma //
// filename (with a context-sensitive path) //
// public member function or data member (including base classes) //
// global variable, function, or class name //
// //
// Also, something like //
// //
// someObject->Func([TAB] //
// someObject.Func([TAB] //
// someClass::Func([TAB] //
// someClass var([TAB] //
// new someClass([TAB] //
// //
// will print a list of prototypes for the indicated //
// method or constructor. //
// //
// Current limitations and bugs: //
// //
// 1. you can only use one member access operator at a time. //
// eg, this will work: gROOT->GetListOfG[TAB] //
// but this will not: gROOT->GetListOfGlobals()->Conta[TAB] //
// //
// 2. nothing is guaranteed to work on windows or VMS //
// (for one thing, /bin/env and /etc/passwd are hardcoded) //
// //
// 3. CINT shortcut #2 is deliberately not supported. //
// (using "operator.()" instead of "operator->()") //
// //
// 4. most identifiers (including C++ identifiers, usernames, //
// environment variables, etc) //
// are restriceted to this character set: [_a-zA-Z0-9] //
// therefore, you won't be able to complete things like //
// //
// operator new //
// operator+ //
// etc //
// //
// 5. ~whatever[TAB] always tries to complete a username. //
// use whitespace (~ whatever[TAB]) if you want to complete a global //
// identifier. //
// //
// 6. CINT shortcut #3 is not supported when trying to complete //
// the name of a global object. (it is supported when trying to //
// complete a member of a global object) //
// //
// 7. the list of #pragma's is hardcoded //
// (ie not obtained from the interpreter at runtime) //
// ==> user-defined #pragma's will not be recognized //
// //
// 8. the system include directories are also hardcoded //
// because i don't know how to get them from the interpreter. //
// fons, maybe they should be #ifdef'd for the different sytems? //
// //
// 9. the TabCom.FileIgnore resource is always applied, even if you //
// are not trying to complete a filename. //
// //
// 10. anything in quotes is assumed to be a filename //
// so (among other things) you can't complete a quoted class name: //
// eg, TClass class1( "TDict[TAB] //
// this won't work... looks for a file in pwd starting with TDict //
// //
// 11. the prototypes tend to omit the word "const" a lot. //
// this is a problem with ROOT or CINT. //
// //
// 12. when listing ambiguous matches, only one column is used, //
// even if there are many completions. //
// //
// 13. anonymous objects are not currently identified //
// so, for example, //
// //
// root> printf( TString([TAB //
// //
// gives an error message instead of listing TString's constructors. //
// (this could be fixed) //
// //
// 14. the routine that adds the "appendage" isn't smart enough to know //
// if it's already there: //
// //
// root> TCanvas::Update() //
// press [TAB] here ^ //
// root> TCanvas::Update()() //
// (this could be fixed) //
// //
// 15. the appendage is only applied if there is exactly 1 match. //
// eg, this //
// //
// root> G__at[TAB] //
// root> G__ateval //
// //
// happens instead of this //
// //
// root> G__at[TAB] //
// root> G__ateval( //
// //
// because there are several overloaded versions of G__ateval(). //
// (this could be fixed) //
// //
////////////////////////////////////////////////////////////////////////////
#include <stdio.h>
#ifdef HAVE_CONFIG
#include "config.h"
#endif
#include "TTabCom.h"
#include "TClass.h"
#include "TSystem.h"
#include "TROOT.h"
#include "TMethod.h"
#include "TEnv.h"
#include "TBenchmark.h"
#include "TError.h"
#include "TGlobal.h"
#include "TList.h"
#include "Getline.h"
#include "TFunction.h"
#include "TMethodArg.h"
#include "Riostream.h"
#include "Rstrstream.h"
//Direct CINT include
#include "DataMbr.h"
#define BUF_SIZE 1024 // must match value in C_Getline.c (for bounds checking)
#define IfDebug(x) if(gDebug==TTabCom::kDebug) x
ClassImp(TTabCom)
// ----------------------------------------------------------------------------
//
// global/file scope variables
//
TTabCom *gTabCom = 0;
extern "C" int gl_root_tab_hook(char *buf, int /*prompt_width */ ,
int *pLoc)
{
return gTabCom ? gTabCom->Hook(buf, pLoc) : -1;
}
// ----------------------------------------------------------------------------
//
// constructors
//
TTabCom::TTabCom()
{
fpDirectives = 0;
fpPragmas = 0;
fpGlobals = 0;
fpGlobalFuncs = 0;
fpClasses = 0;
fpUsers = 0;
fpEnvVars = 0;
fpFiles = 0;
fpSysIncFiles = 0;
InitPatterns();
Gl_tab_hook = gl_root_tab_hook;
}
//
// constructors
//
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
//
// public member functions
//
void TTabCom::ClearClasses()
{
if (!fpClasses)
return;
fpClasses->Delete(0);
delete fpClasses;
fpClasses = 0;
}
void TTabCom::ClearCppDirectives()
{
if (!fpDirectives)
return;
fpDirectives->Delete(0);
delete fpDirectives;
fpDirectives = 0;
}
void TTabCom::ClearEnvVars()
{
if (!fpEnvVars)
return;
fpEnvVars->Delete(0);
delete fpEnvVars;
fpEnvVars = 0;
}
void TTabCom::ClearFiles()
{
if (!fpFiles)
return;
fpFiles->Delete(0);
delete fpFiles;
fpFiles = 0;
}
void TTabCom::ClearGlobalFunctions()
{
if (!fpGlobalFuncs)
return;
fpGlobalFuncs->Delete(0);
delete fpGlobalFuncs;
fpGlobalFuncs = 0;
}
void TTabCom::ClearGlobals()
{
if (!fpGlobals)
return;
fpGlobals->Delete(0);
delete fpGlobals;
fpGlobals = 0;
}
void TTabCom::ClearPragmas()
{
if (!fpPragmas)
return;
fpPragmas->Delete(0);
delete fpPragmas;
fpPragmas = 0;
}
void TTabCom::ClearSysIncFiles()
{
if (!fpSysIncFiles)
return;
fpSysIncFiles->Delete(0);
delete fpSysIncFiles;
fpSysIncFiles = 0;
}
void TTabCom::ClearUsers()
{
if (!fpUsers)
return;
fpUsers->Delete(0);
delete fpUsers;
fpUsers = 0;
}
void TTabCom::ClearAll()
{
// clears all lists
// except for user names and system include files.
ClearClasses();
ClearCppDirectives();
ClearEnvVars();
ClearFiles();
ClearGlobalFunctions();
ClearGlobals();
ClearPragmas();
// ClearSysIncFiles(); <-- this one stays cached
// ClearUsers(); <-- this one stays cached
}
void TTabCom::RehashClasses()
{
ClearClasses();
GetListOfClasses();
}
void TTabCom::RehashCppDirectives()
{
ClearCppDirectives();
GetListOfCppDirectives();
}
void TTabCom::RehashEnvVars()
{
ClearEnvVars();
GetListOfEnvVars();
}
void TTabCom::RehashFiles()
{
ClearFiles(); /* path unknown */
} // think about this
void TTabCom::RehashGlobalFunctions()
{
ClearGlobalFunctions();
GetListOfGlobalFunctions();
}
void TTabCom::RehashGlobals()
{
ClearGlobals();
GetListOfGlobals();
}
void TTabCom::RehashPragmas()
{
ClearPragmas();
GetListOfPragmas();
}
void TTabCom::RehashSysIncFiles()
{
ClearSysIncFiles();
GetListOfSysIncFiles();
}
void TTabCom::RehashUsers()
{
ClearUsers();
GetListOfUsers();
}
void TTabCom::RehashAll()
{
// clears and then rebuilds all lists
// except for user names and system include files.
RehashClasses();
RehashCppDirectives();
RehashEnvVars();
RehashFiles();
RehashGlobalFunctions();
RehashGlobals();
RehashPragmas();
// RehashSysIncFiles(); <-- this one stays cached
// RehashUsers(); <-- this one stays cached
}
const TSeqCollection *TTabCom::GetListOfClasses(void)
{
if (!fpClasses) {
// generate a text list of classes on disk
const char *tmpfilename = tmpnam(0);
TString cmd(".class >");
cmd += tmpfilename; cmd += "n";
gROOT->ProcessLineSync(cmd.Data());
// open the file
ifstream file1(tmpfilename);
if (!file1) {
Error("TTabCom::GetListOfClasses", "could not open file "%s"",
tmpfilename);
gSystem->Unlink(tmpfilename);
return 0;
}
// skip the first 2 lines (which are just header info)
file1.ignore(32000, 'n');
file1.ignore(32000, 'n');
// parse file, add to list
fpClasses = new TContainer;
TString line;
while (file1) {
line = "";
line.ReadLine(file1, kFALSE); // kFALSE ==> don't skip whitespace
line = line(23, 32000);
// old way...
// if (line.Index("class") >= 0)
// line = line(6, 32000);
// else if (line.Index("enum") >= 0)
// line = line(5, 32000);
// else if (line.Index("(unknown)") >= 0)
// line = line(10, 32000);
// line = line("[^ ]*");
// new way...
int index;
if (0);
else if ((index = line.Index(" class ")) >= 0)
line = line(1 + index + 6, 32000);
else if ((index = line.Index(" struct ")) >= 0)
line = line(1 + index + 7, 32000);
else if ((index = line.Index(" enum ")) >= 0)
line = line(1 + index + 5, 32000);
else if ((index = line.Index(" (unknown) ")) >= 0)
line = line(1 + index + 10, 32000);
// 2 changes: 1. use spaces ^ ^ 2. use offset ^^^^^ in case of long
// to reduce probablility that filename which overflows
// these keywords will occur in its field.
// filename or classname.
line = line("[^ ]*");
fpClasses->Add(new TObjString(line.Data()));
}
// done with this file
file1.close();
gSystem->Unlink(tmpfilename);
}
return fpClasses;
}
const TSeqCollection *TTabCom::GetListOfCppDirectives()
{
if (!fpDirectives) {
fpDirectives = new TContainer;
fpDirectives->Add(new TObjString("if"));
fpDirectives->Add(new TObjString("ifdef"));
fpDirectives->Add(new TObjString("ifndef"));
fpDirectives->Add(new TObjString("elif"));
fpDirectives->Add(new TObjString("else"));
fpDirectives->Add(new TObjString("endif"));
fpDirectives->Add(new TObjString("include"));
fpDirectives->Add(new TObjString("define"));
fpDirectives->Add(new TObjString("undef"));
fpDirectives->Add(new TObjString("line"));
fpDirectives->Add(new TObjString("error"));
fpDirectives->Add(new TObjString("pragma"));
}
return fpDirectives;
}
const TSeqCollection *TTabCom::GetListOfFilesInPath(const char path[])
{
// "path" should be initialized with a colon separated list of
// system directories
static TString previousPath;
if (path && fpFiles && strcmp(path, previousPath) == 0) {
return fpFiles;
} else {
ClearFiles();
fpFiles = NewListOfFilesInPath(path);
}
return fpFiles;
}
const TSeqCollection *TTabCom::GetListOfEnvVars()
{
// calls "/bin/env"
if (!fpEnvVars) {
const char *tmpfilename = tmpnam(0);
TString cmd;
#ifndef WIN32
cmd = "/bin/env > ";
#else
cmd = "set > ";
#endif
cmd += tmpfilename; cmd += "\n";
gSystem->Exec(cmd.Data());
// open the file
ifstream file1(tmpfilename);
if (!file1) {
Error("TTabCom::GetListOfEnvVars", "could not open file "%s"",
tmpfilename);
gSystem->Unlink(tmpfilename);
return 0;
}
// parse, add
fpEnvVars = new TContainer;
TString line;
while (file1) // i think this loop goes one time extra which
// results in an empty string in the list, but i don't think it causes any
// problems.
{
line.ReadToDelim(file1, '=');
file1.ignore(32000, 'n');
fpEnvVars->Add(new TObjString(line.Data()));
}
file1.close();
gSystem->Unlink(tmpfilename);
}
return fpEnvVars;
}
//______________________________________________________________________________
const TSeqCollection *TTabCom::GetListOfGlobals()
{
if (!fpGlobals) {
fpGlobals = new TContainer;
G__DataMemberInfo *a;
int last = 0;
int nglob = 0;
// find the number of global objects
G__DataMemberInfo t;
while (t.Next())
nglob++;
for (int i = 0; i < nglob; i++) {
a = new G__DataMemberInfo();
a->Next(); // initial positioning
for (int j = 0; j < last; j++)
a->Next();
// if name cannot be obtained no use to put in list
if (a->IsValid() && a->Name()) {
fpGlobals->Add(new TGlobal(a));
} else
delete a;
last++;
}
}
return fpGlobals;
}
//______________________________________________________________________________
const TSeqCollection *TTabCom::GetListOfGlobalFunctions()
{
if (!fpGlobalFuncs) {
fpGlobalFuncs = new TContainer;
G__MethodInfo *a;
int last = 0;
int nglob = 0;
// find the number of global functions
G__MethodInfo t;
while (t.Next())
nglob++;
for (int i = 0; i < nglob; i++) {
a = new G__MethodInfo();
a->Next(); // initial positioning
for (int j = 0; j < last; j++)
a->Next();
// if name cannot be obtained no use to put in list
if (a->IsValid() && a->Name()) {
fpGlobalFuncs->Add(new TFunction(a));
} else
delete a;
last++;
}
}
return fpGlobalFuncs;
}
const TSeqCollection *TTabCom::GetListOfPragmas()
{
if (!fpPragmas) {
fpPragmas = new TContainer;
fpPragmas->Add(new TObjString("ANSI "));
fpPragmas->Add(new TObjString("autocompile "));
fpPragmas->Add(new TObjString("bytecode "));
fpPragmas->Add(new TObjString("compile "));
fpPragmas->Add(new TObjString("endbytecode "));
fpPragmas->Add(new TObjString("endcompile "));
fpPragmas->Add(new TObjString("include "));
fpPragmas->Add(new TObjString("includepath "));
fpPragmas->Add(new TObjString("K&R "));
fpPragmas->Add(new TObjString("link "));
fpPragmas->Add(new TObjString("preprocess "));
fpPragmas->Add(new TObjString("preprocessor "));
fpPragmas->Add(new TObjString("security level"));
// "setertti " omitted. Ordinaly user should not use this statement
// "setstdio " omitted. Ordinaly user should not use this statement
// "setstream " omitted. Ordinaly user should not use this statement
// "stub" omitted. Ordinaly user should not use this statement
}
return fpPragmas;
}
const TSeqCollection *TTabCom::GetListOfSysIncFiles()
{
if (!fpSysIncFiles) {
fpSysIncFiles = NewListOfFilesInPath(GetSysIncludePath());
}
return fpSysIncFiles;
}
const TSeqCollection *TTabCom::GetListOfUsers()
{
// reads from "/etc/passwd"
if (!fpUsers) {
fpUsers = new TContainer;
ifstream passwd;
TString user;
passwd.open("/etc/passwd");
while (passwd) {
user.ReadToDelim(passwd, ':');
fpUsers->Add(new TObjString(user));
passwd.ignore(32000, 'n');
}
passwd.close();
}
return fpUsers;
}
//
// public member functions
//
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
//
// static utility funcitons
//
Char_t TTabCom::AllAgreeOnChar(int i, const TSeqCollection * pList,
Int_t & nGoodStrings)
{
//[static utility function]///////////////////////////////////////////
//
// if all the strings in "*pList" have the same ith character,
// that character is returned.
// otherwise 0 is returned.
//
// any string "s" for which "ExcludedByFignore(s)" is true
// will be ignored unless All the strings in "*pList"
// are "ExcludedByFignore()"
//
// in addition, the number of strings which were not
// "ExcludedByFignore()" is returned in "nGoodStrings".
//
/////////////////////////////////////////////////////////////////////////
assert(pList != 0);
TIter next(pList);
TObject *pObj;
const char *s;
char ch0;
Bool_t isGood;
Bool_t atLeast1GoodString;
// init
nGoodStrings = 0;
atLeast1GoodString = kFALSE;
// first look for a good string
do {
if ((pObj = next())) {
s = pObj->GetName();
isGood = !ExcludedByFignore(s);
if (isGood) {
atLeast1GoodString = kTRUE;
nGoodStrings += 1;
}
} else {
// reached end of list without finding a single good string.
// just use the first one.
next.Reset();
pObj = next();
s = pObj->GetName();
break;
}
}
while (!isGood);
// found a good string...
ch0 = s[i];
// all subsequent good strings must have the same ith char
do {
if ((pObj = next())) {
s = pObj->GetName();
isGood = !ExcludedByFignore(s);
if (isGood)
nGoodStrings += 1;
} else
return ch0;
}
while (((int) strlen(s) >= i && s[i] == ch0) ||
(atLeast1GoodString && !isGood));
return 0;
}
void TTabCom::AppendListOfFilesInDirectory(const char dirName[],
TSeqCollection * pList)
{
//[static utility function]/////////////////////////////
//
// adds a TObjString to "*pList"
// for each entry found in the system directory "dirName"
//
// directories that do not exist are silently ignored.
//
//////////////////////////////////////////////////////////
assert(dirName != 0);
assert(pList != 0);
// open the directory
void *dir = gSystem->OpenDirectory(dirName);
// it is normal for this function to receive names of directories that do not exist.
// they should be ignored and should not generate any error messages.
if (!dir)
return;
// put each filename in the list
const char *tmp_ptr; // gSystem->GetDirEntry() returns NULL when no more files.
TString fileName;
while ((tmp_ptr = gSystem->GetDirEntry(dir))) {
fileName = tmp_ptr;
// skip "." and ".."
if (fileName == "." || fileName == "..")
continue;
// add to list
pList->Add(new TObjString(dirName + fileName.Prepend("/")));
}
// NOTE:
// with a path like "/usr/include:/usr/include/CC:$ROOTDIR/include:$ROOTDIR/cint/include:..."
// the above loop could get traversed 700 times or more.
// ==> keep it minimal or it could cost whole seconds on slower machines.
// also: TClonesArray doesn't help.
// close the directory
gSystem->FreeDirectory(dir);
}
// -----/-------- homemade RTTI ---------------/------------------------
TString TTabCom::DetermineClass(const char varName[])
{
//[static utility function]/////////////////////////////
//
// returns empty string on failure.
// otherwise returns something like this: "TROOT*".
// fails for non-class types (ie, int, char, etc).
// fails for pointers to functions.
//
///////////////////////////////////
///////////////////////////////////
//
// note that because of the strange way this function works,
// CINT will print
//
// Error: No symbol asdf in current scope FILE:/var/tmp/gaaa001HR LINE:1
//
// if "varName" is not defined. (in this case, varName=="asdf")
// i don't know how to suppress this.
//
///////////////////////////////////
assert(varName != 0);
IfDebug(cerr << "DetermineClass("" << varName << "");" << endl);
const char *tmpfile = tmpnam(0);
TString cmd("gROOT->ProcessLine("");
cmd += varName;
cmd += ""); > ";
cmd += tmpfile; cmd += "n";
gROOT->ProcessLineSync(cmd.Data());
// the type of the variable whose name is "varName"
// should now be stored on disk in the file "tmpfile"
TString type = "";
int c;
// open the file
ifstream file1(tmpfile);
if (!file1) {
Error("TTabCom::DetermineClass", "could not open file "%s"",
tmpfile);
goto cleanup;
}
// first char should be '(', which we can ignore.
c = file1.get();
if (!file1 || c <= 0 || c == '*' || c != '(') {
Error("TTabCom::DetermineClass", "variable "%s" not defined?",
varName);
goto cleanup;
}
IfDebug(cerr << (char) c << flush);
// in case of success, "class TClassName*)0x12345" remains,
// since the opening '(' was removed.
file1 >> type; // ignore "class"
// non-class type ==> failure
if (type == "const")
file1 >> type;
if (type != "class" && type != "struct") {
type = ""; // empty return string indicates failure.
goto cleanup; //* RETURN *//
}
// ignore ' '
c = file1.get();
IfDebug(cerr << (char) c << flush);
// this is what we want
type.ReadToDelim(file1, ')');
IfDebug(cerr << type << endl);
// new version of CINT returns: "class TClassName*const)0x12345"
// so we have to strip off "const"
if (type.EndsWith("const"))
type.Remove(type.Length() - 5);
cleanup:
// done reading from file
file1.close();
gSystem->Unlink(tmpfile);
return type;
}
Bool_t TTabCom::ExcludedByFignore(TString s)
{
//[static utility function]/////////////////////////////
//
// returns true iff "s" ends with one of
// the strings listed in the "TabCom.FileIgnore" resource.
//
/////////////////////////////////////////////////////////////
const char *fignore = gEnv->GetValue("TabCom.FileIgnore", (char *) 0);
if (!fignore) {
return kFALSE;
} else {
#ifdef R__SSTREAM
istringstream endings((char *) fignore);
#else
istrstream endings((char *) fignore); // do i need to make a copy first?
#endif
TString ending;
ending.ReadToDelim(endings, ':');
while (!ending.IsNull()) {
if (s.EndsWith(ending))
return kTRUE;
else
ending.ReadToDelim(endings, ':'); // next
}
return kFALSE;
}
}
TString TTabCom::GetSysIncludePath(void)
{
//[static utility function]/////////////////////////////
//
// returns a colon-separated string of directories
// that CINT will search when you call #include<...>
//
// returns empty string on failure.
//
///////////////////////////////////////////////////////////
// >i noticed that .include doesn't list the standard directories like
// >/usr/include or /usr/include/CC.
// >
// >how can i get a list of all the directories the interpreter will
// >search through when the user does a #include<...> ?
//
// Right now, there is no easy command to tell you about it. Instead, I can
// describe it here.
//
// 1) CINT first searches current working directory for #include "xxx"
// (#include <xxx> does not)
//
// 2) CINT searches include path directories given by -I option
//
// 3) CINT searches following standard include directories.
// $CINTSYSDIR/include
// $CINTSYSDIR/stl
// $CINTSYSDIR/msdev/include if VC++4.0
// $CINTSYSDIR/sc/include if Symantec C++
// /usr/include
// /usr/include/g++ if gcc,g++
// /usr/include/CC if HP-UX
// /usr/include/codelibs if HP-UX
//
// .include command only displays 2).
//
// Thank you
// Masaharu Goto
// 1) current dir
// ----------------------------------------------
// N/A
// 2) -I option (and #pragma includepath)
// ----------------------------------------------
// get this part of the include path from the interpreter
// and stick it in a tmp file.
const char *tmpfilename = tmpnam(0);
TString cmd("gROOT->ProcessLine(".include"); > ");
cmd += tmpfilename; cmd += "n";
gROOT->ProcessLineSync(cmd.Data());
// open the tmp file
ifstream file1(tmpfilename);
if (!file1) { // error
Error("TTabCom::GetSysIncludePath", "could not open file "%s"",
tmpfilename);
gSystem->Unlink(tmpfilename);
return "";
}
// parse it.
TString token; // input buffer
TString path; // all directories so far (colon-separated)
file1 >> token; // skip "include"
file1 >> token; // skip "path:"
while (file1) {
file1 >> token;
if (!token.IsNull()) {
if (path.Length() > 0)
path.Append(":");
path.Append(token.Data() + 2); // +2 skips "-I"
}
}
// done with the tmp file
file1.close();
gSystem->Unlink(tmpfilename);
// 3) standard directories
// ----------------------------------------------
#ifndef CINTINCDIR
TString CINTSYSDIR("$ROOTSYS/cint");
#else
TString CINTSYSDIR(CINTINCDIR);
#endif
path.Append(":" + CINTSYSDIR + "/include");
// path.Append(":"+CINTSYSDIR+"/stl");
// path.Append(":"+CINTSYSDIR+"/msdev/include");
// path.Append(":"+CINTSYSDIR+"/sc/include");
path.Append(":/usr/include");
// path.Append(":/usr/include/g++");
// path.Append(":/usr/include/CC");
// path.Append(":/usr/include/codelibs");
return path;
}
Bool_t TTabCom::IsDirectory(const char fileName[])
{
//[static utility function]/////////////////////////////
//
// calls TSystem::GetPathInfo() to see if "fileName"
// is a system directory.
//
///////////////////////////////////////////////////////
Long_t flags = 0;
gSystem->GetPathInfo(fileName, 0, 0, &flags, 0);
return (int) flags & 2;
}
TSeqCollection *TTabCom::NewListOfFilesInPath(const char path1[])
{
//[static utility function]/////////////////////////////
//
// creates a list containing the full path name for each file
// in the (colon separated) string "path1"
//
// memory is allocated with "new", so
// whoever calls this function takes responsibility for deleting it.
//
//////////////////////////////////////////////////////////////////////
assert(path1 != 0);
TContainer *pList = new TContainer; // maybe use RTTI here? (since its a static function)
#ifdef R__SSTREAM
istringstream path((char *) path1);
#else
istrstream path((char *) path1);
#endif
TString dirName;
dirName.ReadToDelim(path, ':');
while (!dirName.IsNull()) {
IfDebug(cerr << "NewListOfFilesInPath(): dirName = " << dirName <<
endl);
AppendListOfFilesInDirectory(dirName, pList);
// next
dirName.ReadToDelim(path, ':');
}
return pList;
}
Bool_t TTabCom::PathIsSpecifiedInFileName(const TString & fileName)
{
//[static utility function]/////////////////////////////
//
// true if "fileName"
// 1. is an absolute path ("/tmp/a")
// 2. is a relative path ("../whatever", "./test")
// 3. starts with user name ("~/mail")
// 4. starts with an environment variable ("$ROOTSYS/bin")
//
//////////////////////////////////////////////////////////////////////////
char c1 = (fileName.Length() > 0) ? fileName[0] : 0;
return c1 == '/' || c1 == '~' || c1 == '$' || fileName.BeginsWith("./")
|| fileName.BeginsWith("../");
}
void TTabCom::NoMsg(Int_t errorLevel)
{
//[static utility function]/////////////////////////////
//
// calling "NoMsg( errorLevel )",
// sets "gErrorIgnoreLevel" to "errorLevel+1" so that
// all errors with "level < errorLevel" will be ignored.
//
// calling the function with a negative argument
// (e.g., "NoMsg( -1 )")
// resets gErrorIgnoreLevel to its previous value.
//
//////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////
//
// if you call the function twice with a non-negative argument
// (without an intervening call with a negative argument)
// it will complain because it is almost certainly an error
// that will cause the function to loose track of the previous
// value of gErrorIgnoreLevel.
//
// most common causes: 1. suspiciously placed "return;" statement
// 2. calling a function that calls "NoMsg()"
//
//////////////////////////////////////////////////////////////////
const Int_t kNotDefined = -1;
static Int_t old_level = kNotDefined;
if (errorLevel < 0) // reset
{
if (old_level == kNotDefined) {
cerr << "NoMsg(): ERROR 1. old_level==" << old_level << endl;
return;
}
gErrorIgnoreLevel = old_level; // resore
old_level = kNotDefined;
} else // set
{
if (old_level != kNotDefined) {
cerr << "NoMsg(): ERROR 2. old_level==" << old_level << endl;
return;
}
old_level = gErrorIgnoreLevel;
if (gErrorIgnoreLevel <= errorLevel)
gErrorIgnoreLevel = errorLevel + 1;
}
}
//
// static utility funcitons
//
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
//
// private member functions
//
//
Int_t TTabCom::Complete(const TRegexp & re,
const TSeqCollection * pListOfCandidates,
const char appendage[])
{
// [private]
// returns position of first change in buffer
// ------------------------------------------
// -2 ==> new line altogether (whole thing needs to be redrawn, including prompt)
// -1 ==> no changes
// 0 ==> beginning of line
// 1 ==> after 1st char
// n ==> after nth char
IfDebug(cerr << "TTabCom::Complete() ..." << endl);
assert(fpLoc != 0);
assert(pListOfCandidates != 0);
Int_t pos; // position of first change
const int loc = *fpLoc; // location where TAB was pressed
// -----------------------------------------
//
// 1. get the substring we need to complete
//
// NOTES:
// s1 = original buffer
// s2 = sub-buffer from 0 to wherever the user hit TAB
// s3 = the actual text that needs completing
//
// -----------------------------------------
TString s1(fBuf);
TString s2 = s1(0, loc);
TString s3 = s2(re);
int start = s2.Index(re);
IfDebug(cerr << " s1: " << s1 << endl);
IfDebug(cerr << " s2: " << s2 << endl);
IfDebug(cerr << " s3: " << s3 << endl);
IfDebug(cerr << "start: " << start << endl);
IfDebug(cerr << endl);
// -----------------------------------------
// 2. go through each possible completion,
// keeping track of the number of matches
// -----------------------------------------
TList listOfMatches; // list of matches (local filenames only) (insertion order must agree across these 3 lists)
TList listOfFullPaths; // list of matches (full filenames) (insertion order must agree across these 3 lists)
int nMatches = 0; // number of matches
TObject *pObj; // pointer returned by iterator
TIter next_candidate(pListOfCandidates);
TIter next_match(&listOfMatches);
TIter next_fullpath(&listOfFullPaths);
// stick all matches into "listOfMatches"
while ((pObj = next_candidate())) {
// get the full filename
const char *s4 = pObj->GetName();
assert(s4 != 0);
// pick off tail
const char *s5 = strrchr(s4, '/');
if (!s5)
s5 = s4; // no '/' found
else
s5 += 1; // advance past '/'
// check for match
if (strstr(s5, s3) == s5) {
nMatches += 1;
listOfMatches.Add(new TObjString(s5));
listOfFullPaths.Add(new TObjString(s4));
IfDebug(cerr << "adding " << s5 << 't' << s4 << endl);
} else {
IfDebug(cerr << "considered " << s5 << 't' << s4 << endl);
}
}
// -----------------------------------------
// 3. beep, list, or complete
// depending on how many matches were found
// -----------------------------------------
// 3a. no matches ==> bell
TString partialMatch = "";
if (nMatches == 0) {
cout << "a" << flush;
pos = -1;
goto done; //* RETURN *//
}
// 3b. one or more matches.
char match[1024];
if (nMatches == 1) {
// get the (lone) match
const char *short_name = next_match()->GetName();
const char *full_name = next_fullpath()->GetName();
pObj = pListOfCandidates->FindObject(short_name);
if (pObj) {
IfDebug(cerr << endl << "class: " << pObj->ClassName() << endl);
TString className = pObj->ClassName();
if (0);
else if (className == "TMethod" || className == "TFunction") {
TFunction *pFunc = (TFunction *) pObj;
if (pFunc->GetNargsOpt() == pFunc->GetNargs())
appendage = "()"; // all args have default values
else
appendage = "("; // user needs to supply some args
} else if (className == "TDataMember") {
appendage = " ";
}
}
CopyMatch(match, short_name, appendage, full_name);
} else {
// multiple matches ==> complete as far as possible
Char_t ch;
Int_t nGoodStrings;
for (int i = 0;
(ch = AllAgreeOnChar(i, &listOfMatches, nGoodStrings));
i += 1) {
IfDebug(cerr << " i=" << i << " ch=" << ch << endl);
partialMatch.Append(ch);
}
const char *s;
const char *s0;
// multiple matches, but maybe only 1 of them is any good.
if (nGoodStrings == 1) {
// find the 1 good match
do {
s = next_match()->GetName();
s0 = next_fullpath()->GetName();
}
while (ExcludedByFignore(s));
// and use it.
CopyMatch(match, s, appendage, s0);
} else {
IfDebug(cerr << "more than 1 GoodString" << endl);
// if( partialMatch.Length() > (int)strlen(s3) )
if (partialMatch.Length() > s3.Length())
// this partial match is our (partial) completion.
{
CopyMatch(match, partialMatch.Data());
} else
// couldn't do any completing at all,
// print a list of all the ambiguous matches
// (except for those excluded by "FileIgnore")
{
IfDebug(cerr << "printing ambiguous matches" << endl);
cout << endl;
while ((pObj = next_match())) {
s = pObj->GetName();
s0 = next_fullpath()->GetName();
if (!ExcludedByFignore(s) || nGoodStrings == 0) {
if (IsDirectory(s0))
cout << s << "/" << endl;
else
cout << s << endl;
}
}
pos = -2;
goto done; //* RETURN *//
}
}
}
// ---------------------------------------
// 4. finally write text into the buffer.
// ---------------------------------------
{
int i = strlen(fBuf); // old EOL position is i
int L = strlen(match) - (loc - start); // new EOL position will be i+L
// first check for overflow
if (strlen(fBuf) + strlen(match) + 1 > BUF_SIZE) {
Error("TTabCom::Complete", "buffer overflow");
pos = -2;
goto done; /* RETURN */
}
// debugging output
IfDebug(cerr << " i=" << i << endl);
IfDebug(cerr << " L=" << L << endl);
IfDebug(cerr << "loc=" << loc << endl);
// slide everything (including the null terminator) over to make space
for (; i >= loc; i -= 1) {
fBuf[i + L] = fBuf[i];
}
// insert match
strncpy(fBuf + start, match, strlen(match));
pos = loc; // position of first change in "fBuf"
*fpLoc = loc + L; // new cursor position
}
done: // <----- goto label
// un-init
fpLoc = 0;
fBuf = 0;
return pos;
}
void TTabCom::CopyMatch(char dest[], const char localName[],
const char appendage[],
const char fullName[]) const
{
// [private]
// if "appendage" is NULL, no appendage is applied.
//
// if "appendage" is of the form "filenameXXX" then,
// "filename" is ignored and "XXX" is taken to be the appendage,
// but it will only be applied if the file is not a directory...
// if the file is a directory, a "/" will be used for the appendage instead.
//
// if "appendage" is of the form "XXX" then "XXX" will be appended to the match.
assert(dest != 0);
assert(localName != 0);
// potential buffer overflow.
strcpy(dest, localName);
const char *key = "filename";
const int key_len = strlen(key);
IfDebug(cerr << "CopyMatch()." << endl);
IfDebug(cerr << "localName: " << (localName ? localName : "NULL") <<
endl);
IfDebug(cerr << "appendage: " << (appendage ? appendage : "NULL") <<
endl);
IfDebug(cerr << " fullName: " << (fullName ? fullName : "NULL") <<
endl);
// check to see if "appendage" starts with "key"
if (appendage && strncmp(appendage, key, key_len) == 0) {
// filenames get special treatment
appendage += key_len;
IfDebug(cerr << "new appendage: " << appendage << endl);
if (IsDirectory(fullName)) {
if (fullName)
strcpy(dest + strlen(localName), "/");
} else {
if (appendage)
strcpy(dest + strlen(localName), appendage);
}
} else {
if (appendage)
strcpy(dest + strlen(localName), appendage);
}
}
TTabCom::EContext_t TTabCom::DetermineContext() const
{
// [private]
assert(fBuf != 0);
const char *pStart; // start of match
const char *pEnd; // end of match
for (int context = 0; context < kNUM_PAT; ++context) {
pEnd = Matchs(fBuf, *fpLoc, fPat[context], &pStart);
if (pEnd) {
IfDebug(cerr << endl
<< "context=" << context << " "
<< "RegExp=" << fRegExp[context]
<< endl);
return EContext_t(context); //* RETURN *//
}
}
return kUNKNOWN_CONTEXT; //* RETURN *//
}
TString TTabCom::DeterminePath(const TString & fileName,
const char defaultPath[]) const
{
// [private]
if (PathIsSpecifiedInFileName(fileName)) {
TString path = fileName;
gSystem->ExpandPathName(path);
path = gSystem->DirName(path);
return path;
} else {
TString newBase;
TString extendedPath;
if (fileName.Contains("/")) {
newBase = gSystem->DirName(fileName);
extendedPath = ExtendPath(defaultPath, newBase);
} else {
newBase = "";
extendedPath = defaultPath;
}
IfDebug(cerr << endl);
IfDebug(cerr << " fileName: " << fileName << endl);
IfDebug(cerr << " pathBase: " << newBase << endl);
IfDebug(cerr << " defaultPath: " << defaultPath << endl);
IfDebug(cerr << "extendedPath: " << extendedPath << endl);
IfDebug(cerr << endl);
return extendedPath;
}
}
TString TTabCom::ExtendPath(const char originalPath[], TString newBase) const
{
// [private]
if (newBase.BeginsWith("/"))
newBase = newBase.Strip(TString::kLeading, '/');
#ifdef R__SSTREAM
stringstream str;
#else
strstream str;
#endif
TString dir;
TString newPath;
str << originalPath;
#ifndef WIN32
while (str)
#else
while (1)
#endif
{
dir = "";
dir.ReadToDelim(str, ':');
if (dir.IsNull())
continue; // ignore blank entries
newPath.Append(dir);
if (!newPath.EndsWith("/"))
newPath.Append("/");
newPath.Append(newBase);
newPath.Append(':');
}
return newPath.Strip(TString::kTrailing, ':');
}
Int_t TTabCom::Hook(char *buf, int *pLoc)
{
// [private]
// initialize
fBuf = buf;
fpLoc = pLoc;
// default
Int_t pos = -2; // position of the first character that was changed in the buffer (needed for redrawing)
// get the context this tab was triggered in.
EContext_t context = DetermineContext();
// get the substring that triggered this tab (as defined by "SetPattern()")
const char dummy[] = ".";
TRegexp re1(context == kUNKNOWN_CONTEXT ? dummy : fRegExp[context]);
TString s1(fBuf);
TString s2 = s1(0, *fpLoc);
TString s3 = s2(re1);
switch (context) {
case kUNKNOWN_CONTEXT:
cerr << endl << "tab completion not implemented for this context" <<
endl;
pos = -2;
break;
case kSYS_UserName:
{
const TSeqCollection *pListOfUsers = GetListOfUsers();
pos = Complete("[^~]*$", pListOfUsers, "/");
}
break;
case kSYS_EnvVar:
{
const TSeqCollection *pEnv = GetListOfEnvVars();
pos = Complete("[^$]*$", pEnv, "");
}
break;
case kCINT_stdout:
case kCINT_stderr:
case kCINT_stdin:
{
auto TString fileName = s3("[^ ><]*$");
gSystem->ExpandPathName(fileName);
const TString filePath = gSystem->DirName(fileName);
const TSeqCollection *pListOfFiles =
GetListOfFilesInPath(filePath.Data());
// pos = Complete( "[^ /]*$", pListOfFiles, " " );
pos = Complete("[^ /]*$", pListOfFiles, "filename ");
}
break;
case kCINT_Edit:
case kCINT_Load:
case kCINT_Exec:
case kCINT_EXec:
{
const TString fileName = s3("[^ ]*$");
const TString macroPath =
DeterminePath(fileName, TROOT::GetMacroPath());
const TSeqCollection *pListOfFiles =
GetListOfFilesInPath(macroPath.Data());
// pos = Complete( "[^ /]*$", pListOfFiles, " " );
pos = Complete("[^ /]*$", pListOfFiles, "filename ");
}
break;
case kCINT_pragma:
{
pos = Complete("[^ ]*$", GetListOfPragmas(), "");
}
break;
case kCINT_includeSYS:
{
TString fileName = s3("[^<]*$");
if (PathIsSpecifiedInFileName(fileName) || fileName.Contains("/")) {
TString includePath =
DeterminePath(fileName, GetSysIncludePath());
// pos = Complete( "[^</]*$", GetListOfFilesInPath( includePath ), "> " );
pos =
Complete("[^</]*$", GetListOfFilesInPath(includePath),
"filename> ");
} else {
// pos = Complete( "[^</]*$", GetListOfSysIncFiles(), "> " );
pos =
Complete("[^</]*$", GetListOfSysIncFiles(), "filename> ");
}
}
break;
case kCINT_includePWD:
{
const TString fileName = s3("[^"]*$");
const TString includePath = DeterminePath(fileName, ".");
const TSeqCollection *pListOfFiles =
GetListOfFilesInPath(includePath.Data());
// pos = Complete( "[^"/]*$", pListOfFiles, "" " );
pos = Complete("[^"/]*$", pListOfFiles, "filename" ");
}
break;
case kCINT_cpp:
{
pos = Complete("[^# ]*$", GetListOfCppDirectives(), " ");
}
break;
case kROOT_Load:
{
const TString fileName = s3("[^"]*$");
// const TString dynamicPath = DeterminePath( fileName, TROOT::GetDynamicPath() ); /* should use this one */
const TString dynamicPath =
DeterminePath(fileName,
gEnv->GetValue("Root.DynamicPath", (char *) 0));
const TSeqCollection *pListOfFiles = GetListOfFilesInPath(dynamicPath);
// pos = Complete( "[^"/]*$", pListOfFiles, "");" );
pos = Complete("[^"/]*$", pListOfFiles, "filename");");
}
break;
case kSYS_FileName:
{
auto TString fileName = s3("[^ "]*$");
gSystem->ExpandPathName(fileName);
const TString filePath = gSystem->DirName(fileName);
const TSeqCollection *pListOfFiles =
GetListOfFilesInPath(filePath.Data());
// pos = Complete( "[^" /]*$", pListOfFiles, """ );
pos = Complete("[^" /]*$", pListOfFiles, "filename"");
}
break;
case kCXX_ScopeMember:
case kCXX_DirectMember:
case kCXX_IndirectMember:
{
const EContext_t original_context = context; // save this for later
TClass *pClass;
TString name = s3("^[_a-zA-Z][_a-zA-Z0-9]*"); // may be a class, object, or pointer
IfDebug(cerr << endl);
IfDebug(cerr << "name: " << '"' << name << '"' << endl);
switch (context) {
case kCXX_ScopeMember:
pClass = MakeClassFromClassName(name);
break;
case kCXX_DirectMember:
pClass = MakeClassFromVarName(name, context);
break;
case kCXX_IndirectMember:
pClass = MakeClassFromVarName(name, context);
break;
default:
assert(0);
break;
}
if (!pClass) {
pos = -2;
break;
}
TContainer *pList = new TContainer;
pList->AddAll((TCollection *) pClass->
GetListOfAllPublicMethods());
pList->AddAll((TCollection *) pClass->
GetListOfAllPublicDataMembers());
switch (context) {
case kCXX_ScopeMember:
pos = Complete("[^: ]*$", pList, "(");
break;
case kCXX_DirectMember:
pos = Complete("[^. ]*$", pList, "(");
break;
case kCXX_IndirectMember:
pos = Complete("[^> ]*$", pList, "(");
break;
default:
assert(0);
break;
}
delete pList;
delete pClass;
if (context != original_context)
pos = -2;
}
break;
case kCXX_ScopeProto:
case kCXX_DirectProto:
case kCXX_IndirectProto:
case kCXX_NewProto:
case kCXX_ConstructorProto:
{
const EContext_t original_context = context; // save this for later
// get class
TClass *pClass;
TString name;
if (context == kCXX_NewProto) {
name = s3("[_a-zA-Z][_a-zA-Z0-9]* *($", 3);
name.Chop();
// name.Remove( TString::kTrailing, ' ' ); // fons: don't you think this would be nice?
name = name.Strip(TString::kTrailing, ' ');
// "name" should now be the name of a class
} else {
name = s3("^[_a-zA-Z][_a-zA-Z0-9]*");
// "name" may now be the name of a class, object, or pointer
}
IfDebug(cerr << endl);
IfDebug(cerr << "name: " << '"' << name << '"' << endl);
switch (context) {
case kCXX_ScopeProto:
pClass = MakeClassFromClassName(name);
break;
case kCXX_DirectProto:
pClass = MakeClassFromVarName(name, context);
break;
case kCXX_IndirectProto:
pClass = MakeClassFromVarName(name, context);
break;
case kCXX_NewProto:
pClass = MakeClassFromClassName(name);
break;
case kCXX_ConstructorProto:
pClass = MakeClassFromClassName(name);
break;
default:
assert(0);
break;
}
if (!pClass) {
pos = -2;
break;
}
// get method name
TString methodName;
if (context == kCXX_ConstructorProto || context == kCXX_NewProto) {
// (constructor)
methodName = name;
} else {
// (normal member function)
methodName = s3("[^:>\.(]*($");
methodName.Chop();
// methodName.Remove( TString::kTrailing, ' ' ); // fons: don't you think this would be nice?
methodName = methodName.Strip(TString::kTrailing, ' ');
}
IfDebug(cerr << methodName << endl);
// get methods
TContainer *pList = new TContainer;
pList->AddAll((TCollection *) pClass->
GetListOfAllPublicMethods());
// print prototypes
Bool_t foundOne = kFALSE;
TIter nextMethod(pList);
TMethod *pMethod;
while ((pMethod = (TMethod *) nextMethod())) {
if (methodName == pMethod->GetName()) {
foundOne = kTRUE;
cout << endl << pMethod->GetReturnTypeName()
<< " " << pMethod->GetName()
<< pMethod->GetSignature();
const char *comment = pMethod->GetCommentString();
if (comment && comment[0] != '0') {
cout << " t// " << comment;
}
}
}
// done
if (foundOne) {
cout << endl;
pos = -2;
} else {
cout << "a" << flush;
pos = -1;
}
// cleanup
delete pList;
delete pClass;
if (context != original_context)
pos = -2;
}
break;
case kCXX_Global:
{
// first need to veto a few possibilities.
int L2 = s2.Length(), L3 = s3.Length();
// "abc().whatever[TAB]"
if (L2 > L3 && s2[L2 - L3 - 1] == '.') {
cerr << endl <<
"tab completion not implemented for this context" << endl;
break; // veto
}
// "abc()->whatever[TAB]"
if (L2 > L3 + 1 && s2(L2 - L3 - 2, 2) == "->") {
cerr << endl <<
"tab completion not implemented for this context" << endl;
break; // veto
}
TContainer *pList = new TContainer;
// shouldn't TCollection::AddAll( TCollection* ) take a const argument?
const TSeqCollection *pL2 = GetListOfClasses();
pList->AddAll((TSeqCollection *) pL2);
//
const TSeqCollection *pC1 = GetListOfGlobals();
pList->AddAll((TSeqCollection *) pC1);
//
const TSeqCollection *pC3 = GetListOfGlobalFunctions();
pList->AddAll((TSeqCollection *) pC3);
pos = Complete("[_a-zA-Z][_a-zA-Z0-9]*$", pList, "");
delete pList;
}
break;
case kCXX_GlobalProto:
{
// get function name
TString functionName = s3("[_a-zA-Z][_a-zA-Z0-9]*");
IfDebug(cerr << functionName << endl);
TContainer listOfMatchingGlobalFuncs;
TIter nextGlobalFunc(GetListOfGlobalFunctions());
TObject *pObj;
while ((pObj = nextGlobalFunc())) {
if (strcmp(pObj->GetName(), functionName) == 0) {
listOfMatchingGlobalFuncs.Add(pObj);
}
}
if (listOfMatchingGlobalFuncs.IsEmpty()) {
cerr << endl << "no such function: " << dblquote(functionName)
<< endl;
} else {
cout << endl;
TIter next(&listOfMatchingGlobalFuncs);
TFunction *pFunction;
while ((pFunction = (TFunction *) next())) {
cout << pFunction->GetReturnTypeName()
<< " " << pFunction->GetName()
<< pFunction->GetSignature()
<< endl;
}
}
pos = -2;
}
break;
/******************************************************************/
/* */
/* default: should never happen */
/* */
/******************************************************************/
default:
assert(0);
break;
}
return pos;
}
void TTabCom::InitPatterns(void)
{
// [private]
// add more patterns somewhere below.
// add corresponding enum to "EContext_t"
//
// note:
// 1. in some cases order is important ...
//
// the order of the "case" statements in "switch( context )" in "TTabCom::Hook()" is Not important.
//
// the order of the "SetPattern()" function calls below is Not important.
//
// the order of the initializers in the "EContext_t" enumeration Is important
// because DetermineContext() goes through the array in order, and returns at the first match.
//
// 2. below, "$" will match cursor position
SetPattern(kSYS_UserName, "~[_a-zA-Z0-9]*$");
SetPattern(kSYS_EnvVar, "$[_a-zA-Z0-9]*$");
SetPattern(kCINT_stdout, "; *>>?.*$"); // stdout
SetPattern(kCINT_stderr, "; *2>>?.*$"); // stderr
SetPattern(kCINT_stdin, "; *<.*$"); // stdin
SetPattern(kCINT_Edit, "^ *\.E .*$");
SetPattern(kCINT_Load, "^ *\.L .*$");
SetPattern(kCINT_Exec, "^ *\.x +[-0-9_a-zA-Z~$./]*$");
SetPattern(kCINT_EXec, "^ *\.X +[-0-9_a-zA-Z~$./]*$");
SetPattern(kCINT_pragma, "^# *pragma +[_a-zA-Z0-9]*$");
SetPattern(kCINT_includeSYS, "^# *include *<[^>]*$"); // system files
SetPattern(kCINT_includePWD, "^# *include *"[^"]*$"); // local files
SetPattern(kCINT_cpp, "^# *[_a-zA-Z0-9]*$");
SetPattern(kROOT_Load, "gSystem *-> *Load *( *"[^"]*$");
SetPattern(kCXX_ScopeMember,
"[_a-zA-Z][_a-zA-Z0-9]* *:: *[_a-zA-Z0-9]*$");
SetPattern(kCXX_DirectMember,
"[_a-zA-Z][_a-zA-Z0-9]* *\. *[_a-zA-Z0-9]*$");
SetPattern(kCXX_IndirectMember,
"[_a-zA-Z][_a-zA-Z0-9]* *-> *[_a-zA-Z0-9]*$");
SetPattern(kCXX_ScopeProto,
"[_a-zA-Z][_a-zA-Z0-9]* *:: *[_a-zA-Z0-9]* *($");
SetPattern(kCXX_DirectProto,
"[_a-zA-Z][_a-zA-Z0-9]* *\. *[_a-zA-Z0-9]* *($");
SetPattern(kCXX_IndirectProto,
"[_a-zA-Z][_a-zA-Z0-9]* *-> *[_a-zA-Z0-9]* *($");
SetPattern(kCXX_NewProto, "new +[_a-zA-Z][_a-zA-Z0-9]* *($");
SetPattern(kCXX_ConstructorProto,
"[_a-zA-Z][_a-zA-Z0-9]* +[_a-zA-Z][_a-zA-Z0-9]* *($");
SetPattern(kSYS_FileName, ""[-0-9_a-zA-Z~$./]*$");
SetPattern(kCXX_Global, "[_a-zA-Z][_a-zA-Z0-9]*$");
SetPattern(kCXX_GlobalProto, "[_a-zA-Z][_a-zA-Z0-9]* *($");
}
TClass *TTabCom::MakeClassFromClassName(const char className[]) const
{
// [private]
// (does some specific error handling that makes the function unsuitable for general use.)
// returns a new'd TClass given the name of a class.
// user must delete.
// returns 0 in case of error.
// the TClass constructor will print a Warning message for classes that don't exist
// so, ignore warnings temporarily.
NoMsg(kWarning);
TClass *pClass = new TClass(className);
NoMsg(-1);
// make sure "className" exists
if (pClass->Size() == 0) {
// i'm assuming this happens iff there was some error.
// (misspelled the class name, for example)
cerr << endl << "class " << dblquote(className) << " not defined." <<
endl;
return 0;
}
return pClass;
}
TClass *TTabCom::MakeClassFromVarName(const char varName[],
EContext_t & context)
{
// [private]
// (does some specific error handling that makes the function unsuitable for general use.)
// returns a new'd TClass given the name of a variable.
// user must delete.
// returns 0 in case of error.
// if user has operator.() or operator->() bacwards, will modify: context, *fpLoc and fBuf.
// context sensitive behevior.
// need to make sure "varName" exists
// because "DetermineClass()" prints clumsy error message otherwise.
Bool_t varName_exists = GetListOfGlobals()->Contains(varName) || // check in list of globals first.
(gROOT->FindObject(varName) != 0); // then check CINT "shortcut #3"
// not found...
if (!varName_exists) {
cerr << endl << "variable " << dblquote(varName) << " not defined."
<< endl;
return 0; //* RETURN *//
}
/*****************************************************************************************/
/* */
/* this section is really ugly. */
/* and slow. */
/* it could be made a lot better if there was some way to tell whether or not a given */
/* variable is a pointer or a pointer to a pointer. */
/* */
/*****************************************************************************************/
TString className = DetermineClass(varName);
if (className.Length() < 1) {
// this will happen if "varName" is a fundamental type (as opposed to class type).
// or a pointer to a pointer.
// or a function pointer.
cerr << endl << "problem determining class of " << dblquote(varName)
<< endl;
return 0; //* RETURN *//
}
Bool_t varIsPointer = className[className.Length() - 1] == '*';
if (varIsPointer &&
(context == kCXX_DirectMember || context == kCXX_DirectProto)) {
// user is using operator.() instead of operator->()
// ==>
// 1. we are in wrong context.
// 2. user is lazy
// 3. or maybe confused
// 1. fix the context
switch (context) {
case kCXX_DirectMember:
context = kCXX_IndirectMember;
break;
case kCXX_DirectProto:
context = kCXX_IndirectProto;
break;
default:
assert(0);
break;
}
// 2. fix the operator.
int i;
for (i = *fpLoc; fBuf[i] != '.'; i -= 1) {
}
int loc = i;
for (i = strlen(fBuf); i >= loc; i -= 1) {
fBuf[i + 1] = fBuf[i];
}
fBuf[loc] = '-';
fBuf[loc + 1] = '>';
*fpLoc += 1;
// 3. inform the user.
cerr << endl << dblquote(varName) <<
" is of pointer type. Use this operator: ->" << endl;
}
if (context == kCXX_IndirectMember || context == kCXX_IndirectProto) {
if (varIsPointer) {
className.Chop(); // remove the '*'
if (className[className.Length() - 1] == '*') {
cerr << endl << "can't handle pointers to pointers." << endl;
return 0; //* RETURN *//
}
} else {
// user is using operator->() instead of operator.()
// ==>
// 1. we are in wrong context.
// 2. user is lazy
// 3. or maybe confused
// 1. fix the context
switch (context) {
case kCXX_IndirectMember:
context = kCXX_DirectMember;
break;
case kCXX_IndirectProto:
context = kCXX_DirectProto;
break;
default:
assert(0);
break;
}
// 2. fix the operator.
int i;
for (i = *fpLoc; fBuf[i - 1] != '-' && fBuf[i] != '>'; i -= 1) {
}
fBuf[i - 1] = '.';
int len = strlen(fBuf);
for (; i < len; i += 1) {
fBuf[i] = fBuf[i + 1];
}
*fpLoc -= 1;
// 3. inform the user.
cerr << endl << dblquote(varName) <<
" is not of pointer type. Use this operator: ." << endl;
}
}
return new TClass(className);
}
void TTabCom::SetPattern(EContext_t handle, const char regexp[])
{
// [private]
// prevent overflow
if (handle >= kNUM_PAT) {
cerr << endl
<< "ERROR: handle="
<< (int) handle << " >= kNUM_PAT=" << (int) kNUM_PAT << endl;
return;
}
fRegExp[handle] = regexp;
Makepat(regexp, fPat[handle], MAX_LEN_PAT);
}
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