From 6a9911249d7121c57ba279c77a2e5c4b24212354 Mon Sep 17 00:00:00 2001
From: Alexander Frink <Alexander.Frink@uni-mainz.de>
Date: Tue, 14 Dec 1999 21:23:29 +0000
Subject: [PATCH] first release of GiNaCcint

---
 cint/configure       |  40 +++++++
 cint/dummy_ginsh.cpp |  14 +++
 cint/ginaccint.cpp   | 242 +++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 296 insertions(+)
 create mode 100755 cint/configure
 create mode 100644 cint/dummy_ginsh.cpp
 create mode 100644 cint/ginaccint.cpp

diff --git a/cint/configure b/cint/configure
new file mode 100755
index 00000000..0b3941f0
--- /dev/null
+++ b/cint/configure
@@ -0,0 +1,40 @@
+#!/bin/sh
+
+echo
+echo "GiNaCcint configure script"
+echo "--------------------------"
+echo
+echo "Warning: this is not a sophisticated GNU configure script!"
+echo
+echo "It tests if cint is installed"
+echo "What it does NOT check:"
+echo "    the ginac source files (e.g. ginac.h) must be in ../ginac"
+echo "    libginac must have been compiled with -D NO_GINAC_NAMESPACE"
+echo "    libginac.a or libginac.so must be found in ../ginac/.libs"
+echo "    libcln.a or libcln.so must be in the standard link path"
+echo
+
+if [ X"$CINTSYSDIR"X = "XX" ]; then
+    echo "ERROR: cint does not seem to be installed (\$CINTSYSDIR not set)"
+    exit
+fi;
+echo "ok, cint seems to be installed (\$CINTSYSDIR = $CINTSYSDIR)"
+
+if [ X`which cint`X = "XX" ]; then
+    echo "ERROR: cint not in \$PATH"
+    exit
+fi;
+echo "ok, cint seems to be in \$PATH"
+
+makecint -mk Makefile -o ginaccint -m \
+ -D OBSCURE_CINT_HACK -D NO_GINAC_NAMESPACE \
+ -I .. -I $CINTSYSDIR \
+ -m -H ../ginac/ginac.h -C++ dummy_ginsh.cpp -C++ ginaccint.cpp \
+ -l ../ginac/.libs/libginac.a -lcln \
+ -cint -M0x10
+echo "ok, makecint has created the Makefile"
+
+echo
+echo "Configuration done. Now type \"make\"."
+echo "(please ignore template warnings about 'statement with no effect')"
+
diff --git a/cint/dummy_ginsh.cpp b/cint/dummy_ginsh.cpp
new file mode 100644
index 00000000..0e384f2e
--- /dev/null
+++ b/cint/dummy_ginsh.cpp
@@ -0,0 +1,14 @@
+#include <ginac/function.h>
+
+#ifndef NO_GINAC_NAMESPACE
+using namespace GiNaC;
+#endif // ndef NO_GINAC_NAMESPACE
+
+void ginsh_get_ginac_functions(void)
+{
+}
+
+ex IEvalf(void)
+{
+    return 0;
+}
diff --git a/cint/ginaccint.cpp b/cint/ginaccint.cpp
new file mode 100644
index 00000000..27c643f7
--- /dev/null
+++ b/cint/ginaccint.cpp
@@ -0,0 +1,242 @@
+#include "G__ci.h"   /* G__atpause is defined in G__ci.h */
+#include <iostream>
+#include <fstream>
+#include <string>
+#include <stdio.h>
+#include <stdlib.h>
+#include <ginac/ginac.h>
+#include <list>
+
+extern "C" G__value G__exec_tempfile G__P((char *file));
+extern "C" void G__store_undo_position(void);
+
+#ifdef OBSCURE_CINT_HACK
+
+#include <strstream>
+
+template<class T>
+string ToString(T const & t)
+{
+    char buf[256];
+    ostrstream(buf,sizeof(buf)) << t << ends;
+    return buf;
+}
+
+basic * ex::last_created_or_assigned_bp=0;
+bool ex::last_created_or_assigned_bp_modified=false;
+
+#endif // def OBSCURE_CINT_HACK
+
+typedef list<char *> cplist;
+
+cplist filenames;
+
+void cleanup(void)
+{
+    for (cplist::iterator it=filenames.begin(); it!=filenames.end(); ++it) {
+        cout << "removing file " << *it << endl;
+        remove(*it);
+        free(*it);
+    }
+}
+
+void sigterm_handler(int n)
+{
+    exit(1);
+}
+
+bool is_whitespace_char(char c)
+{
+    return ((c==' ')||(c=='\t')||(c=='\n')||(c=='\r')); 
+}
+
+char first_non_whitespace_char(char const * s)
+{
+    int l=strlen(s);
+    int pos=0;
+    while ((pos<l)&&is_whitespace_char(s[pos])) pos++;
+    return s[pos];
+}    
+
+char last_non_whitespace_char(char const * s)
+{
+    int pos=strlen(s)-1;
+    while ((pos>=0)&&is_whitespace_char(s[pos])) pos--;
+    return s[pos];
+}    
+
+string strip_whitespace(string const & s)
+{
+    string s2;
+    int l=s.length();
+    for (int pos=0; pos<l; ++pos) {
+        if (!is_whitespace_char(s[pos])) s2 += s[pos];
+    }
+    return s2;
+}
+
+G__value exec_tempfile(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;
+}
+
+char * process_permanentfile(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;
+}
+
+void process_tempfile(string const & command)
+{
+#ifdef OBSCURE_CINT_HACK
+    static G__value ref_ex=exec_tempfile("ex ginac_cint_internal; ginac_cint_internal;");
+    ex dummy_ex;
+    ex::last_created_or_assigned_bp_modified=false;
+#endif // def OBSCURE_CINT_HACK
+
+    G__value retval=exec_tempfile(command);
+
+#ifdef OBSCURE_CINT_HACK
+    static unsigned out_count=0;
+    if (!ex::last_created_or_assigned_bp_modified) {
+        if ((ref_ex.type==retval.type)&&(ref_ex.tagnum==retval.tagnum)) {
+            ex * ep=(ex *)(retval.obj.i);
+            dummy_ex=*ep;
+        }
+    }
+    if (ex::last_created_or_assigned_bp_modified) {
+        if (ex::last_created_or_assigned_bp_can_be_converted_to_ex()) {
+            string varname="Out"+ToString(++out_count);
+            exec_tempfile("ex "+varname+"(*ex::last_created_or_assigned_bp);\n"
+                         +"LLLAST=LLAST;\n"
+                         +"LLAST=LAST;\n"
+                         +"LAST="+varname+";\n"
+                         +"cout << \""+varname+" = \" << "+varname+" << endl << endl;"); 
+        } else {
+            cout << "warning: last_created_or_assigned_bp modified but 0 or not evaluated or not dynallocated" << endl;
+        }
+    }
+#endif // def OBSCURE_CINT_HACK
+}
+
+void greeting(void)
+{
+    cout << "Welcome to GiNaCcint V0.2" << endl << endl;
+    cout << "To quit, type 'quit;', 'exit;', 'bye;', '.q', '.quit', '.exit' or '.bye'" << endl;
+}
+
+int main(void) 
+{
+    char *line;
+    char prompt[G__ONELINE];
+
+    greeting();
+
+    atexit(cleanup);
+    signal(SIGTERM,sigterm_handler);
+    
+    G__init_cint("cint");    /* initialize cint */
+
+    exec_tempfile("#include <string>\n");
+    exec_tempfile("ex LAST,LLAST,LLLAST;\n");
+    
+    bool quit=false;
+    bool next_command_is_function=false;    
+    while (!quit) {
+        strcpy(prompt,"GiNaCcint> ");
+        int open_braces=0;
+        bool end_of_command=false;
+        string command;
+        while (!end_of_command) {
+            line=G__input(prompt);
+        
+            int pos = 0;
+	    bool double_quote=false;
+            bool single_quote=false;
+            while(line[pos]!='\0') {
+                switch(line[pos]) {
+                case '"':
+                    if (!single_quote) double_quote = !double_quote;
+                    break;
+                case '\'':
+                    if (!double_quote) single_quote = !single_quote;
+                    break;
+                case '{':
+                    if ((!single_quote)&&(!double_quote)) open_braces++;
+                    break;
+                case '}':
+                    if ((!single_quote)&&(!double_quote)) open_braces--;
+                    break;
+                }
+                pos++;
+            }
+            command += line;
+            command += '\n';
+            if (open_braces==0) {
+                if ((first_non_whitespace_char(command.c_str())=='#')||
+                    (first_non_whitespace_char(command.c_str())=='.')||
+                    (last_non_whitespace_char(command.c_str())==';')||
+                    (last_non_whitespace_char(command.c_str())=='}')) {
+                    end_of_command=true;
+                }
+            }
+            strcpy(prompt,"  (more) > ");
+        }
+        string stripped_command=strip_whitespace(command);
+        if ((stripped_command=="quit;")||
+            (stripped_command=="exit;")||
+            (stripped_command=="bye;")||
+            (stripped_command==".q")||
+            (stripped_command==".quit")||
+            (stripped_command==".exit")||
+            (stripped_command==".bye")) {
+            quit=true;
+        } else if (stripped_command==".function") {
+            cout << "next expression can be a function definition" << endl;
+            next_command_is_function=true;
+        } else if (stripped_command==".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 (command[0]=='.') {
+            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);
+            }
+        }
+    }
+
+    return 0;
+}
+
+
+
+
+
+
+
-- 
2.44.0