building in separate directory didn't work
[ginac.git] / cint / ginaccint.bin.cpp
index 9e095cf920d0daa8fbfd59dd2e6fbeb8bb57275f..edb0e806a6cb816220e64d78c6e2513b91a083a3 100644 (file)
@@ -1,7 +1,10 @@
+/* ginaccint.bin.cpp:  Binary depends on CINTSYSDIR, better don't call it
+ * directly.  Use the launcher (compiled from ginaccint.cpp) instead. */
+
 #include "G__ci.h"   /* G__atpause is defined in G__ci.h */
 
-#if (!defined(G__CINTVERSION)) || (G__CINTVERSION < 501438)
-#error You need at least cint 5.14.38 to compile GiNaC-cint. Download it via http from root.cern.ch/root/Cint.html or via ftp from ftpthep.physik.uni-mainz.de/pub/cint
+#if (!defined(G__CINTVERSION)) || (G__CINTVERSION < 501460)
+#error You need at least cint 5.14.60 to compile GiNaC-cint. Download it via http from root.cern.ch/root/Cint.html or via ftp from ftpthep.physik.uni-mainz.de/pub/cint
 #endif // (!defined(G__CINTVERSION)) || (G__CINTVERSION < 501438)
 
 #include <iostream>
@@ -28,498 +31,578 @@ extern "C" void G__store_undo_position(void);
 #include <strstream>
 
 template<class T>
-string ToString(const T & t)
+std::string ToString(const T & t)
 {
-    char buf[256];
-    ostrstream(buf,sizeof(buf)) << t << ends;
-    return buf;
+       char buf[256];
+       ostrstream(buf,sizeof(buf)) << t << ends;
+       return buf;
 }
 
-basic * ex::last_created_or_assigned_bp=0;
-basic * ex::dummy_bp=0;
-long ex::last_created_or_assigned_exp=0;
+basic * ex::last_created_or_assigned_bp = 0;
+basic * ex::dummy_bp = 0;
+long ex::last_created_or_assigned_exp = 0;
 
 #endif // def OBSCURE_CINT_HACK
 
-G__value exec_tempfile(string const & command);
-char * process_permanentfile(string const & command);
-void process_tempfile(string const & command);
+G__value exec_tempfile(std::string const & command);
+char * process_permanentfile(std::string const & command);
+void process_tempfile(std::string const & command);
+void printversionmessage(std::ostream & os);
 void greeting(void);
 void helpmessage(void);
-string preprocess(char const * const line, bool & comment, bool & single_quote,
-                  bool & double_quote, unsigned & open_braces);
+std::string preprocess(char const * const line, bool & comment, bool & single_quote,
+                       bool & double_quote, unsigned & open_braces);
 void cleanup(void);
 void sigterm_handler(int n);
 void initialize(void);
 void initialize_cint(void);
 void restart(void);
-bool readlines(istream * is, string & allcommands);
-bool readfile(string const & filename, string & allcommands);
-void savefile(string const & filename, string const & allcommands);
+bool is_command(std::string const & command, std::string & preprocessed,
+                std::string const & comparevalue, bool substr=false);
+bool readlines(istream * is, std::string & allcommands);
+bool readfile(std::string const & filename, std::string & allcommands, bool shutup=false);
+void savefile(std::string const & filename, std::string const & allcommands);
 
 typedef list<char *> cplist;
 cplist filenames;
-bool redirect_output=false;
+bool redirect_output = false;
+bool silent = false;
 
-G__value exec_tempfile(string const & command)
+G__value exec_tempfile(std::string const & command)
 {
-    G__value retval;
-    char *tmpfilename = tempnam(NULL,"ginac");
-    ofstream fout;
-    fout.open(tmpfilename);
-    fout << "{" << endl << command << endl << "}" << endl;
-    fout.close();
-    G__store_undo_position();
-    retval = G__exec_tempfile(tmpfilename);
-    G__security_recover(stdout);
-    remove(tmpfilename);
-    free(tmpfilename);
-    return retval;
+       G__value retval;
+       char *tmpfilename = tempnam(NULL,"ginac");
+       std::ofstream fout;
+       fout.open(tmpfilename);
+       fout << "{" << std::endl << command << std::endl << "}" << std::endl;
+       fout.close();
+       G__store_undo_position();
+       retval = G__exec_tempfile(tmpfilename);
+       G__security_recover(stdout);
+       remove(tmpfilename);
+       free(tmpfilename);
+       return retval;
 }
 
-char * process_permanentfile(string const & command)
+char * process_permanentfile(std::string const & command)
 {
-    char *tmpfilename = tempnam(NULL,"ginac");
-    cout << "creating file " << tmpfilename << endl;
-    ofstream fout;
-    fout.open(tmpfilename);
-    fout << command << endl;
-    fout.close();
-    G__store_undo_position();
-    G__loadfile(tmpfilename);
-    G__security_recover(stdout);
-    return tmpfilename;
+       char *tmpfilename = tempnam(NULL,"ginac");
+       if (!silent)
+               std::cout << "creating file " << tmpfilename << std::endl;
+       std::ofstream fout;
+       fout.open(tmpfilename);
+       fout << command << std::endl;
+       fout.close();
+       G__store_undo_position();
+       G__loadfile(tmpfilename);
+       G__security_recover(stdout);
+       return tmpfilename;
 }
 
-void process_tempfile(string const & command)
+void process_tempfile(std::string const & command)
 {
 #ifdef OBSCURE_CINT_HACK
-    static G__value ref_symbol = exec_tempfile("symbol ginac_cint_internal_symbol; ginac_cint_internal_symbol;");
-    static G__value ref_constant = exec_tempfile("constant ginac_cint_internal_constant; ginac_cint_internal_constant;");
-    static G__value ref_function = exec_tempfile("sin(ginac_cint_internal_symbol);");
-    static G__value ref_power = exec_tempfile("power(ex(ginac_cint_internal_symbol),ex(ginac_cint_internal_symbol));");
-    static G__value ref_numeric = exec_tempfile("numeric ginac_cint_internal_numeric; ginac_cint_internal_numeric;");
-    static G__value ref_ex = exec_tempfile("ex ginac_cint_internal_ex; ginac_cint_internal_ex;");
-    static bool basic_type_warning_already_displayed=false;
+       static G__value ref_symbol = exec_tempfile("symbol ginac_cint_internal_symbol; ginac_cint_internal_symbol;");
+       static G__value ref_constant = exec_tempfile("constant ginac_cint_internal_constant; ginac_cint_internal_constant;");
+       static G__value ref_function = exec_tempfile("sin(ginac_cint_internal_symbol);");
+       static G__value ref_power = exec_tempfile("power(ex(ginac_cint_internal_symbol),ex(ginac_cint_internal_symbol));");
+       static G__value ref_numeric = exec_tempfile("numeric ginac_cint_internal_numeric; ginac_cint_internal_numeric;");
+       static G__value ref_ex = exec_tempfile("ex ginac_cint_internal_ex; ginac_cint_internal_ex;");
+       static bool basic_type_warning_already_displayed = false;
 #endif // def OBSCURE_CINT_HACK
 
-    G__value retval = exec_tempfile(command);
+       G__value retval = exec_tempfile(command);
 
 #ifdef OBSCURE_CINT_HACK
 
-    #define TYPES_EQUAL(A,B) (((A).type==(B).type) && ((A).tagnum==(B).tagnum))
-    
-    static unsigned out_count = 0;
-    if (TYPES_EQUAL(retval,ref_ex)) {
-        string varname = "Out"+ToString(++out_count);
-        if (retval.obj.i!=ex::last_created_or_assigned_exp) {
-            // an ex was returned, but this is not the ex which was created last
-            // => this is not a temporary ex, but one that resides safely in memory
-            
-            // cout << "warning: using ex from retval (experimental)" << endl;
-            ex::dummy_bp=((ex *)(void *)(retval.obj.i))->bp;
-            exec_tempfile("ex "+varname+"(*ex::dummy_bp);");
-        } else if (ex::last_created_or_assigned_bp_can_be_converted_to_ex()) {
-            //string varfill;
-            //for (int i=4-int(log10(out_count)); i>0; --i)
-            //    varfill += ' ';
-            exec_tempfile("ex "+varname+"(*ex::last_created_or_assigned_bp);");
-        } else {
-            cout << "warning: last_created_or_assigned_bp modified 0 or not evaluated or not dynallocated" << endl;
-        }
-        exec_tempfile(string()+"LLLAST=LLAST;\n"
-                      +"LLAST=LAST;\n"
-                      +"LAST="+varname+";\n"
-                      +"if (ginac_cint_internal_redirect_output&&"
-                      +"    ginac_cint_internal_fout.good()) {" 
-                      +"    ginac_cint_internal_fout << \""+varname+" = \" << "+varname+" << endl << endl;"
-                      +"} else {"
-                      +"    cout << \""+varname+" = \" << "+varname+" << endl << endl;"
-                      +"}");
-    } else if (TYPES_EQUAL(retval,ref_symbol)||
-               TYPES_EQUAL(retval,ref_constant)||
-               TYPES_EQUAL(retval,ref_function)||
-               TYPES_EQUAL(retval,ref_power)||
-               TYPES_EQUAL(retval,ref_numeric)) {
-        if (!basic_type_warning_already_displayed) {
-            cout << endl
-                 <<"WARNING: The return value of the last expression you entered was a symbol," << endl
-                 << "constant, function, power or numeric, which cannot be safely displayed." << endl
-                 << "To force the output, cast it explicitly to type 'ex' or use 'cout'," << endl
-                 << "for example (assume 'x' is a symbol):" << endl
-                 << PROMPT1 "ex(x);" << endl
-                 << "OutX = x" << endl << endl
-                 << PROMPT1 "cout << x << endl;" << endl
-                 << "x" << endl << endl
-                 << "This warning will not be shown again." << endl;
-            basic_type_warning_already_displayed=true;
-        }
-    }
+       #define TYPES_EQUAL(A,B) (((A).type==(B).type) && ((A).tagnum==(B).tagnum))
+       
+       static unsigned out_count = 0;
+       if (TYPES_EQUAL(retval,ref_ex)) {
+               std::string varname = "Out"+ToString(++out_count);
+               if (retval.obj.i!=ex::last_created_or_assigned_exp) {
+                       // an ex was returned, but this is not the ex which was created last
+                       // => this is not a temporary ex, but one that resides safely in memory
+                       
+                       // std::cout << "warning: using ex from retval (experimental)" << std::endl;
+                       ex::dummy_bp = ((ex *)(void *)(retval.obj.i))->bp;
+                       exec_tempfile("ex "+varname+"(*ex::dummy_bp);");
+               } else if (ex::last_created_or_assigned_bp_can_be_converted_to_ex()) {
+                       exec_tempfile("ex "+varname+"(*ex::last_created_or_assigned_bp);");
+               } else {
+                       std::cout << "warning: last_created_or_assigned_bp modified 0 or not evaluated or not dynallocated" << std::endl;
+               }
+               exec_tempfile(std::string()+"LLLAST=LLAST;\n"
+                             +"LLAST=LAST;\n"
+                             +"LAST="+varname+";\n"
+                             +"if (ginac_cint_internal_redirect_output&&"
+                             +"    ginac_cint_internal_fout.good()) {" 
+                             +"    ginac_cint_internal_fout << \""+varname+" = \" << "+varname+" << endl << endl;"
+                             +"} else {"
+                             +"    std::cout << \""+varname+" = \" << "+varname+" << endl << endl;"
+                             +"}");
+       } else if (TYPES_EQUAL(retval,ref_symbol)||
+                  TYPES_EQUAL(retval,ref_constant)||
+                  TYPES_EQUAL(retval,ref_function)||
+                  TYPES_EQUAL(retval,ref_power)||
+                  TYPES_EQUAL(retval,ref_numeric)) {
+               if (!basic_type_warning_already_displayed) {
+                       std::cout << std::endl
+                                 <<"WARNING: The return value of the last expression you entered was a symbol," << std::endl
+                                 << "constant, function, power or numeric, which cannot be safely displayed." << std::endl
+                                 << "To force the output, cast it explicitly to type 'ex' or use 'cout'," << std::endl
+                                 << "for example (assume 'x' is a symbol):" << std::endl
+                                 << PROMPT1 "ex(x);" << std::endl
+                                 << "OutX = x" << std::endl << std::endl
+                                 << PROMPT1 "cout << x << endl;" << std::endl
+                                 << "x" << std::endl << std::endl
+                                 << "This warning will not be shown again." << std::endl;
+                       basic_type_warning_already_displayed = true;
+               }
+       }
 #endif // def OBSCURE_CINT_HACK
+       return;
+}
+
+void printversionmessage(std::ostream & os)
+{
+       os << "GiNaC-cint (" << PACKAGE << " V" << VERSION
+          << ", Cint V" << G__CINTVERSION/1000000
+          << '.' << G__CINTVERSION/1000%1000
+          << '.' << G__CINTVERSION%1000 << ')' << endl;
+       return;
 }
 
 void greeting(void)
 {
-    cout << "Welcome to GiNaC-cint (" << PACKAGE << " V" << VERSION << ")" << endl;
-    cout << "This software is provided \"as is\" without any warranty.  Copyright of Cint is" << endl
-         << "owned by Agilent Technologies Japan and Masaharu Goto.  Registration is" << endl
-         << "  __,  _______  requested, at this moment, for commercial use.  Send e-mail to" << endl
-         << " (__) *       | <MXJ02154@niftyserve.or.jp>.  The registration is free." << endl
-         << "  ._) i N a C | The GiNaC framework is Copyright by Johannes Gutenberg Univ.," << endl
-         << "<-------------' Germany and licensed under the terms and conditions of the GPL." << endl
-         << "Type .help for help." << endl
-         << endl;
+       std::cout << "Welcome to ";
+       printversionmessage(std::cout);
+       std::cout << "  __,  _______  GiNaC: (C) 1999-2001 Johannes Gutenberg University Mainz,\n"
+                 << " (__) *       | Germany.  Cint C/C++ interpreter: (C) 1995-2001 Masaharu\n"
+                 << "  ._) i N a C | Goto and Agilent Technologies, Japan.  This is free software\n"
+                 << "<-------------' with ABSOLUTELY NO WARRANTY.  For details, type `.warranty'\n"
+                 << "Type `.help' for help.\n\n";
+       return;
 }
 
 void helpmessage(void)
 {
-    cout << "GiNaC-cint recognizes some special commands which start with a dot:" << endl << endl
-         << "  .cint                    switch to cint interactive mode (see cint" << endl
-         << "                           documentation for further details)" << endl
-         << "  .function                define the body of a function (necessary due to a" << endl
-         << "                           cint limitation)" << endl
-         << "  .help                    the text you are currently reading" << endl
-         << "  .q, .quit, .exit, .bye   quit GiNaC-cint" << endl
-         << "  .read filename           read a file from disk and execute it in GiNaC-cint" << endl
-         << "                           (recursive call is possible)" << endl
-         << "  .redirect [filename]     redirect 'OutXY = ...' output to a file" << endl
-         << "                           (.redirect alone redirects output back to console)" << endl
-         << "  .restart                 restart GiNaC-cint (does not re-read command line" << endl
-         << "                           files)" << endl
-         << "  .save filename           save the commands you have entered so far in a file" << endl
-         << "  .silent                  suppress 'OutXY = ...' output (variables are still" << endl
-         << "                           accessible)" << endl
-         << "  .> [filename]            same as .redirect [filename]" << endl << endl
-<< "Additionally you can exit GiNaC-cint with quit; exit; or bye;" << endl
-         << endl;
+    std::cout << "GiNaC-cint recognizes some special commands which start with a dot:\n\n"
+                 << "  .cint                    switch to cint interactive mode (see cint\n"
+                 << "                           documentation for further details)\n"
+                 << "  .function                define the body of a function (necessary due to a\n"
+                 << "                           cint limitation)\n"
+                 << "  .help                    the text you are currently reading\n"
+                 << "  .q, .quit, .exit, .bye   quit GiNaC-cint\n"
+                 << "  .read filename           read a file from disk and execute it in GiNaC-cint\n"
+                 << "                           (recursive call is possible)\n"
+                 << "  .redirect [filename]     redirect 'OutXY = ...' output to a file\n"
+                 << "                           (.redirect alone redirects output back to console)\n"
+                 << "  .restart                 restart GiNaC-cint (does not re-read command line\n"
+                 << "                           files)\n"
+                 << "  .save filename           save the commands you have entered so far in a file\n"
+                 << "  .silent                  suppress 'OutXY = ...' output (variables are still\n"
+                 << "                           accessible)\n"
+                 << "  .warranty                information on redistribution and warranty\n"
+                 << "  .> [filename]            same as .redirect [filename]\n\n"
+                 << "Instead of '.cmd' you can also write '//GiNaC-cint.cmd' to be compatible with\n"
+                 << "programs that will be compiled later.\n"
+                 << "Additionally you can exit GiNaC-cint with quit; exit; or bye;\n\n";
+    return;
 }
 
-string preprocess(char const * const line, bool & comment, bool & single_quote,
-                  bool & double_quote, unsigned & open_braces)
+void warrantymessage(void)
 {
-    // "preprocess" the line entered to be able to decide if the command shall be
-    // executed directly or more input is needed or this is a special command
-
-    // ALL whitespace will be removed
-    // all comments (/* */ and //) will be removed
-    // open and close braces ( { and } ) outside strings will be counted 
-
-    /*
-    cout << "line=" << line << endl;
-    cout << "comment=" << comment << ", single_quote=" << single_quote
-         << ",double_quote=" << double_quote << ", open_braces=" << open_braces
-         << endl;
-    */
-    
-    string preprocessed;
-    int pos=0;
-    bool end=false;
-    bool escape=false;
-    bool slash=false;
-    bool asterisk=false;
-    while ((line[pos]!='\0')&&!end) {
-        if (escape) {
-            // last character was a \, ignore this one
-            escape=false;
-        } else if (slash) {
-            // last character was a /, test if * or /
-            slash=false;
-            if (line[pos]=='/') {
-                end=true;
-            } else if (line[pos]=='*') {
-                comment=true;
-            } else {
-                preprocessed += '/';
-                preprocessed += line[pos];
-            }
-        } else if (asterisk) {
-            // last character was a *, test if /
-            asterisk=false;
-            if (line[pos]=='/') {
-                comment=false;
-            } else if (line[pos]=='*') {
-                preprocessed += '*';
-                asterisk=true;
-            }
-        } else {
-            switch (line[pos]) {
-            case ' ':
-            case '\t':
-            case '\n':
-            case '\r':
-                // whitespace: ignore
-                break;
-            case '\\':
-                // escape character, ignore next
-                escape=true;
-                break;
-            case '"':
-                if ((!single_quote)&&(!comment)) {
-                    double_quote = !double_quote;
-                }
-                break;
-                case '\'':
-                    if ((!double_quote)&&(!comment)) {
-                        single_quote = !single_quote;
-                    }
-                    break;
-            case '{':
-                if ((!single_quote)&&(!double_quote)&&(!comment)) {
-                    open_braces++;
-                }
-                break;
-            case '}':
-                if ((!single_quote)&&(!double_quote)&&(!comment)&&(open_braces>0)) {
-                    open_braces--;
-                }
-                break;
-            case '/':
-                slash=true;
-                break;
-            case '*':
-                asterisk=true;
-                break;
-            default:
-                preprocessed += line[pos];
-            }
-        }
-        pos++;
-    }
-
-    /*
-    cout << "preprocessed=" << preprocessed << endl;
-    cout << "comment=" << comment << ", single_quote=" << single_quote
-         << ",double_quote=" << double_quote << ", open_braces=" << open_braces
-         << endl;
-    */
-    
-    return preprocessed;
+       std::cout << "GiNaC is free software; you can redistribute it and/or modify it under the\n"
+                 << "the terms of the GNU General Public License as published by the Free Software\n"
+                 << "Foundation; either version 2 of the License, or (at your option) any later\n"
+                 << "version.\n"
+                 << "This program is distributed in the hope that it will be useful, but WITHOUT\n"
+                 << "ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS\n"
+                 << "FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more\n"
+                 << "details.\n"
+                 << "You should have received a copy of the GNU General Public License along with\n"
+                 << "this program. If not, write to the Free Software Foundation, 675 Mass Ave,\n"
+                 << "Cambridge, MA 02139, USA.\n\n";
+       std::cout << "Cint and associated tools are copyright by Agilent Technologies Japan Company\n"
+                 << "and Masaharu Goto <MXJ02154@niftyserve.or.jp>.\n"
+                 << "Source code, binary executable or library of Cint and associated tools can be\n"
+                 << "used, modified and distributed with no royalty for any purpose provided that\n"
+                 << "the copyright notice appear in all copies and that both that copyright notice\n"
+                 << "and this permission notice appear in supporting documentation.\n"
+                 << "Agilent Technologies Japan and the author make no representations about the\n"
+                 << "suitability of this software for any purpose.  It is provided \"AS IS\"\n"
+                 << "without express or implied warranty.\n";
+    return;
+}
+
+/** "preprocess" the line entered to be able to decide if the command shall be
+ *  executed directly or more input is needed or this is a special command.
+ *  All whitespace will be removed.  All comments will be removed.  Open and
+ *  close braces ( { and } ) outside strings will be counted. */
+std::string preprocess(char const * const line, bool & comment, bool & single_quote,
+                       bool & double_quote, unsigned & open_braces)
+{
+       std::string preprocessed;
+       int pos = 0;
+       bool end = false;
+       bool escape = false;
+       bool slash = false;
+       bool asterisk = false;
+       while ((line[pos]!='\0')&&!end) {
+               if (escape) {
+                       // last character was a \, ignore this one
+                       escape = false;
+               } else if (slash) {
+                       // last character was a /, test if * or /
+                       slash = false;
+                       if (line[pos]=='/') {
+                               end = true;
+                       } else if (line[pos]=='*') {
+                               comment = true;
+                       } else {
+                               preprocessed += '/';
+                               preprocessed += line[pos];
+                       }
+               } else if (asterisk) {
+                       // last character was a *, test if /
+                       asterisk = false;
+                       if (line[pos]=='/') {
+                               comment = false;
+                       } else if (line[pos]=='*') {
+                               preprocessed += '*';
+                               asterisk = true;
+                       }
+               } else {
+                       switch (line[pos]) {
+                       case ' ':
+                       case '\t':
+                       case '\n':
+                       case '\r':
+                               // whitespace: ignore
+                               break;
+                       case '\\':
+                               // escape character, ignore next
+                               escape = true;
+                               break;
+                       case '"':
+                               if ((!single_quote)&&(!comment)) {
+                                       double_quote = !double_quote;
+                               }
+                               break;
+                               case '\'':
+                                       if ((!double_quote)&&(!comment)) {
+                                               single_quote = !single_quote;
+                                       }
+                                       break;
+                       case '{':
+                               if ((!single_quote)&&(!double_quote)&&(!comment)) {
+                                       ++open_braces;
+                               }
+                               break;
+                       case '}':
+                               if ((!single_quote)&&(!double_quote)&&(!comment)&&(open_braces>0)) {
+                                       --open_braces;
+                               }
+                               break;
+                       case '/':
+                               slash = true;
+                               break;
+                       case '*':
+                               asterisk = true;
+                               break;
+                       default:
+                               preprocessed += line[pos];
+                       }
+               }
+               ++pos;
+       }
+       
+       return preprocessed;
 }
 
 void cleanup(void)
 {
-    for (cplist::iterator it=filenames.begin(); it!=filenames.end(); ++it) {
-        cout << "removing file " << *it << endl;
-        remove(*it);
-        free(*it);
-    }
+       for (cplist::iterator it=filenames.begin(); it!=filenames.end(); ++it) {
+               if (!silent)
+                       std::cout << "removing file " << *it << std::endl;
+               remove(*it);
+               free(*it);
+       }
 }
 
 void sigterm_handler(int n)
 {
-    exit(1);
+       G__scratch_all();
+       exit(1);
 }
 
 void initialize(void)
 {
-    if (isatty(0))
-        greeting();
-
-    atexit(cleanup);
-    signal(SIGTERM,sigterm_handler);
-    initialize_cint();
+       atexit(cleanup);
+       signal(SIGTERM, sigterm_handler);
+       initialize_cint();
 }    
 
 void initialize_cint(void)
 {
-    G__init_cint("cint");    /* initialize cint */
-
-    // no longer needed as of cint 5.14.31
-    // exec_tempfile("#include <string>\n");
-
+       G__init_cint("cint");    /* initialize cint */
+       
 #ifndef NO_NAMESPACE_GINAC
-    exec_tempfile("using namespace GiNaC;");
+       exec_tempfile("using namespace GiNaC;");
 #endif // ndef NO_NAMESPACE_GINAC
-    
-    exec_tempfile("ex LAST,LLAST,LLLAST;\n");
-    exec_tempfile("bool ginac_cint_internal_redirect_output=false;\n");
-    exec_tempfile("ofstream ginac_cint_internal_fout;\n");
+       
+       exec_tempfile("ex LAST,LLAST,LLLAST;\n");
+       exec_tempfile("bool ginac_cint_internal_redirect_output=false;\n");
+       exec_tempfile("ofstream ginac_cint_internal_fout;\n");
 }    
 
 void restart(void)
 {
-    cout << "Restarting GiNaC-cint." << endl;
-    G__scratch_all();
-    initialize_cint();
+       std::cout << "Restarting GiNaC-cint." << std::endl;
+       G__scratch_all();
+       initialize_cint();
 }
 
-void redirect(string const & filename)
+void redirect(std::string const & filename,
+              bool shutup=false)
 {
-    if (filename=="") {
-        cout << "Redirecting output back to console..." << endl;
-        exec_tempfile( string()
-                      +"ginac_cint_internal_redirect_output=false;\n"
-                      +"ginac_cint_internal_fout.close();");
-    } else {
-        cout << "Redirecting output to " << filename << "..." << endl;
-        exec_tempfile( string()
-                      +"ginac_cint_internal_redirect_output=true;\n"
-                      +"ginac_cint_internal_fout.open(\""+filename+"\");\n");
-    }
+       if (filename=="") {
+               if (!shutup)
+                       std::cout << "Redirecting output back to console..." << std::endl;
+               exec_tempfile(std::string()
+                             +"ginac_cint_internal_redirect_output=false;\n"
+                             +"ginac_cint_internal_fout.close();");
+       } else {
+               if (!shutup)
+                       std::cout << "Redirecting output to " << filename << "..." << std::endl;
+               exec_tempfile(std::string()
+                             +"ginac_cint_internal_redirect_output=true;\n"
+                             +"ginac_cint_internal_fout.open(\""+filename+"\");\n");
+       }
 }
 
-bool readlines(istream * is, string & allcommands)
+/** Sort out command line options and evaluate them.  Returns true if it
+ *  succeeds and false otherwise. */
+bool evaloption(const std::string & option)
 {
-    char const * line;
-    char prompt[G__ONELINE];
-    string linebuffer;
-    
-    bool quit = false;
-    bool eof = false;
-    bool next_command_is_function=false;
-    bool single_quote=false;
-    bool double_quote=false;
-    bool comment=false;
-    unsigned open_braces=0;
-
-    while ((!quit)&&(!eof)) {
-        strcpy(prompt,PROMPT1);
-        bool end_of_command = false;
-        string command;
-        string preprocessed;
-        while (!end_of_command) {
-            if (is==NULL) {
-                line = G__input(prompt);
-            } else {
-                getline(*is,linebuffer);
-                line=linebuffer.c_str();
-            }
-            command += line;
-            command += "\n";
-            preprocessed += preprocess(line,comment,single_quote,double_quote,open_braces);
-            if ((open_braces==0)&&(!single_quote)&&(!double_quote)&&(!comment)) {
-                unsigned l=preprocessed.length();
-                if ((l==0)||
-                    (preprocessed[0]=='#')||
-                    (preprocessed[0]=='.')||
-                    (preprocessed[l-1]==';')||
-                    (preprocessed[l-1]=='}')) {
-                    end_of_command=true;
-                }
-            }
-            strcpy(prompt,PROMPT2);
-        }
-        if ((preprocessed=="quit;")||
-            (preprocessed=="exit;")||
-            (preprocessed=="bye;")||
-            (preprocessed==".q")||
-            (preprocessed==".quit")||
-            (preprocessed==".exit")||
-            (preprocessed==".bye")) {
-            quit = true;
-        } else if (preprocessed==".function") {
-            cout << "next expression can be a function definition" << endl;
-            next_command_is_function=true;
-        } else if (preprocessed==".cint") {
-            cout << endl << "switching to cint interactive mode" << endl;
-            cout << "'h' for help, 'q' to quit, '{ statements }' or 'p [expression]' to evaluate" << endl;
-            G__pause();
-            cout << "back from cint" << endl;
-        } else if (preprocessed==".help") {
-            helpmessage();
-        } else if (preprocessed.substr(0,5)==".read") {
-            quit=readfile(preprocessed.substr(5),allcommands);
-        } else if (preprocessed.substr(0,5)==".save") {
-            command = "// "+command; // we do not want the .save command itself in saved files
-            savefile(preprocessed.substr(5),allcommands);
-        } else if (preprocessed==".restart") {
-            restart();
-        } else if (preprocessed.substr(0,9)==".redirect") {
-            redirect(preprocessed.substr(9));
-        } else if (preprocessed.substr(0,2)==".>") {
-            redirect(preprocessed.substr(2));
-        } else if (preprocessed==".silent") {
-            redirect("/dev/null");
-        /* test for more special commands
-        } else if (preprocessed==".xyz") {
-            cout << "special command (TBD): " << command << endl;
-        */
-        } else {
-            // cout << "now processing: " << command << endl;
-            if (next_command_is_function) {
-                next_command_is_function = false;
-                filenames.push_back(process_permanentfile(command));
-            } else {
-                process_tempfile(command);
-            }
-        }
-        if (is!=NULL) {
-            // test for end of file if reading from a stream
-            eof=is->eof();
-        } else {
-            // save commands only when reading from keyboard
-            allcommands += command;
-        }
-
-    }
-    return quit;
-}    
+       if (option=="--version") {
+               printversionmessage(std::cout);
+               exit(0);
+       }
+       if (option=="--help") {
+               printversionmessage(std::cout);
+               std::cout << "usage: ginaccint [option] [file ...]\n";
+               std::cout << " --help           print this help message and exit\n"
+                         << " --silent         invoke ginaccint in silent mode\n"
+                         << " --version        print GiNaC version and Cint version and exit\n";
+               exit(0);
+       }
+       if (option=="--silent") {
+               redirect("/dev/null",true);
+               silent = true;
+               return true;
+       }
+       return false;
+}
 
-bool readfile(string const & filename, string & allcommands)
+bool is_command(std::string const & command,
+                std::string & preprocessed,
+                std::string const & comparevalue,
+                bool substr)
 {
-    cout << "Reading commands from file " << filename << "." << endl;
-    bool quit=false;
-    ifstream fin;
-    fin.open(filename.c_str());
-    if (fin.good()) {
-        quit=readlines(&fin,allcommands);
-    } else {
-        cout << "Cannot open " << filename << " for reading." << endl;
-    }
-    fin.close();
-    return quit;
+       bool single_quote = false;
+       bool double_quote = false;
+       bool comment = false;
+       unsigned open_braces = 0;
+       if ((preprocessed=="."+comparevalue)||
+               substr&&(preprocessed.substr(0,comparevalue.length()+1)==
+                                "."+comparevalue)) {
+               return true;
+       }
+       if ((command=="//GiNaC-cint."+comparevalue+"\n") ||
+               substr &&
+               (command.substr(0,comparevalue.length()+13)=="//GiNaC-cint."+comparevalue)) {
+               preprocessed = preprocess(command.substr(12).c_str(),comment,
+                                         single_quote,double_quote,open_braces);
+               return true;
+       }
+       return false;
 }
 
-void savefile(string const & filename, string const & allcommands)
+bool readlines(istream * is,
+               std::string & allcommands)
+{
+       char const * line;
+       char prompt[G__ONELINE];
+       std::string linebuffer;
+       
+       bool quit = false;
+       bool eof = false;
+       bool next_command_is_function = false;
+       bool single_quote = false;
+       bool double_quote = false;
+       bool comment = false;
+       unsigned open_braces = 0;
+
+       while ((!quit)&&(!eof)) {
+               strcpy(prompt,PROMPT1);
+               bool end_of_command = false;
+               std::string command;
+               std::string preprocessed;
+               while (!end_of_command) {
+                       if (is==NULL) {
+                               line = G__input(prompt);
+                       } else {
+                               getline(*is,linebuffer);
+                               line = linebuffer.c_str();
+                       }
+                       command += line;
+                       command += "\n";
+                       preprocessed += preprocess(line,comment,single_quote,double_quote,open_braces);
+                       if ((open_braces==0)&&(!single_quote)&&(!double_quote)&&(!comment)) {
+                               unsigned l = preprocessed.length();
+                               if ((l==0)||
+                                   (preprocessed[0]=='#')||
+                                   (preprocessed[0]=='.')||
+                                   (preprocessed[l-1]==';')||
+                                   (preprocessed[l-1]=='}')) {
+                                   end_of_command = true;
+                               }
+                       }
+                       strcpy(prompt,PROMPT2);
+               }
+               if ((preprocessed=="quit;")||
+                   (preprocessed=="exit;")||
+                   (preprocessed=="bye;")||
+                   (is_command(command,preprocessed,"quit"))||
+                   (is_command(command,preprocessed,"exit"))||
+                   (is_command(command,preprocessed,"bye"))||
+                   (is_command(command,preprocessed,"q"))) {
+                   quit = true;
+               } else if (is_command(command,preprocessed,"function")) {
+                       if (!silent)
+                               std::cout << "next expression can be a function definition" << std::endl;
+                       next_command_is_function = true;
+               } else if (is_command(command,preprocessed,"cint")) {
+                       std::cout << std::endl << "switching to cint interactive mode" << std::endl;
+                       std::cout << "'h' for help, 'q' to quit, '{ statements }' or 'p [expression]' to evaluate" << std::endl;
+                       G__pause();
+                       std::cout << "back from cint" << std::endl;
+               } else if (is_command(command,preprocessed,"help")) {
+                       helpmessage();
+               } else if (is_command(command,preprocessed,"read",true)) {
+                       quit = readfile(preprocessed.substr(5),allcommands);
+               } else if (is_command(command,preprocessed,"save",true)) {
+                       command = "/* "+command+" */"; // we do not want the .save command itself in saved files
+                       savefile(preprocessed.substr(5),allcommands);
+               } else if (is_command(command,preprocessed,"restart")) {
+                       restart();
+               } else if (is_command(command,preprocessed,"redirect",true)) {
+                       redirect(preprocessed.substr(9));
+               } else if (is_command(command,preprocessed,">",true)) {
+                       redirect(preprocessed.substr(2));
+               } else if (is_command(command,preprocessed,"silent")) {
+                       if (!silent) {
+                               redirect("/dev/null");
+                               silent = true;
+                       } else {
+                               redirect("");
+                               silent = false;
+                       }
+               } else if (is_command(command,preprocessed,"warranty")) {
+                       warrantymessage();
+               /* insert tests for more special commands here */
+               } else if (command.substr(0,2)=="#!") {
+                       // ignore lines which indicate that this file is executed as a script
+               } else {
+                       // std::cout << "now processing: " << command << std::endl;
+                       if (next_command_is_function) {
+                               next_command_is_function = false;
+                               filenames.push_back(process_permanentfile(command));
+                       } else {
+                               process_tempfile(command);
+                       }
+               }
+               if (is!=NULL) {
+                       // test for end of file if reading from a stream
+                       eof = is->eof();
+               } else {
+                       // save commands only when reading from keyboard
+                       allcommands += command;
+               }
+
+       }
+       return quit;
+} 
+
+bool readfile(std::string const & filename,
+              std::string & allcommands,
+              bool shutup = false)
 {
-    cout << "Saving commands to file " << filename << "." << endl;
-    ofstream fout;
-    fout.open(filename.c_str());
-    if (fout.good()) {
-        fout << allcommands;
-        if (!fout.good()) {
-            cout << "Cannot save commands to " << filename << "." << endl;
-        }
-    } else {
-        cout << "Cannot open " << filename << " for writing." << endl;
-    }
-    fout.close();
+       if (!shutup)
+               std::cout << "Reading commands from file " << filename << "." << std::endl;
+       bool quit = false;
+       std::ifstream fin;
+       fin.open(filename.c_str());
+       if (fin.good())
+               quit = readlines(&fin,allcommands);
+       else
+               std::cout << "Cannot open " << filename << " for reading." << std::endl;
+       fin.close();
+       return quit;
 }
 
-int main(int argc, char ** argv) 
+void savefile(std::string const & filename, std::string const & allcommands)
 {
-    string allcommands;
-    initialize();
-
-    bool quit=false;
-    bool argsexist=argc>1;
-
-    if (argsexist) {
-        allcommands="/* Files given as command line arguments:\n";
-    }
-    
-    argc--; argv++;
-    while (argc && !quit) {
-        allcommands += *argv;
-        allcommands += "\n";
-        quit=readfile(*argv,allcommands);
-        argc--; argv++;
-    }
-
-    if (argsexist) {
-        allcommands += "*/\n";
-    }
-
-    if (!quit) {
-        readlines(NULL,allcommands);
-    }
-
-    return 0;
+       std::cout << "Saving commands to file " << filename << "." << std::endl;
+       std::ofstream fout;
+       fout.open(filename.c_str());
+       if (fout.good()) {
+               fout << allcommands;
+               if (!fout.good()) {
+                       std::cout << "Cannot save commands to " << filename << "." << std::endl;
+               }
+       } else {
+               std::cout << "Cannot open " << filename << " for writing." << std::endl;
+       }
+       fout.close();
 }
 
-
-
-
-
-
-
+int main(int argc, char * *argv) 
+{
+       std::string allcommands;
+       initialize();
+       
+       bool quit = false;
+       // sort out and evaluate recognized options from the argument list
+       for (int i=1; i<argc; ++i)
+               if (evaloption(argv[i])) {
+                       for (int j=i; j<argc-1; ++j)
+                               argv[j] = argv[j+1];
+                       --argc;
+               }
+       bool argsexist = argc>1;
+       
+       // greet the user if it makes sense
+       if (isatty(0) && !silent)
+               greeting();
+       
+       // evaluate files given as command line arguments
+       if (argsexist) {
+               allcommands = "/* Files given as command line arguments:\n";
+               --argc;
+               while (argc && !quit) {
+                       allcommands += std::string(argv[argc])+'\n';
+                       quit = readfile(argv[argc], allcommands, silent);
+                       --argc;
+               }
+               allcommands += "*/\n";
+       }
+       
+       // evaluate input from command line or script
+       if (!quit)
+               readlines(NULL, allcommands);
+       
+       return 0;
+}