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// kForth.cpp
//
// The kForth environment
//
// Copyright (c) 1998--2000 Krishna Myneni and David P. Wallace,
// Creative Consulting for Research and Education
//
// This software is provided under the terms of the GNU General Public License.
//
//
// Usage from console prompt:
//
// kforth name[.4th] [-D]
//
char* Rls_Date = "8-8-2000";
#include <stdio.h>
#include <fstream.h>
#include <strstream.h>
#include <string.h>
#include <vector>
extern "C" {
#include <readline/readline.h>
#include <readline/history.h>
}
#include "fbc.h"
#include "ForthCompiler.h"
#include "ForthVM.h"
extern vector<DictionaryEntry> Dictionary;
extern char* C_ErrorMessages[];
extern "C" int* JumpTable;
int debug = 0;
void main(int argc, char *argv[])
{
char name[256], InFileName[256], OutFileName[256], *cp, ch;
char s[256], *input_line;
istrstream* pSS = NULL;
char* prompt = " ok\n";
vector<byte> op;
int nWords, i, j, ec;
cout << "\nkForth v 1.0";
cout << "\nRls. " << Rls_Date;
cout << "\nCopyright (c) 1998--2000 Krishna Myneni and David P. Wallace";
cout << "\nCreative Consulting for Research and Education";
cout << "\nProvided under the GNU General Public License.\n\n";
nWords = OpenForth();
i = 1;
while (i < argc)
{
if (strstr(argv[i], "-D"))
{
debug = -1;
}
else
{
strcpy (s, "include ");
strcat (s, argv[i]);
pSS = new istrstream (s);
}
++i;
}
if (debug) cout << '\n' << nWords << " words defined.\n";
int* sp;
byte* tp;
int line_num;
if (debug) cout << "Jump Table address is " << JumpTable;
cout << "\nReady!\n";
//---------------- the interpreter main loop
SetForthOutputStream (cout);
while (1)
{
// Obtain commands and execute
do
{
if (! pSS)
{
input_line = readline(NULL);
if (strlen(input_line)) add_history(input_line);
strncpy(s, input_line, 255);
free(input_line);
pSS = new istrstream (s);
}
SetForthInputStream (*pSS);
ec = ForthCompiler (&op, &line_num);
delete pSS;
pSS = NULL;
} while (ec == E_C_ENDOFSTREAM) ; // test for premature end of input
// such as a word definition
// that spans multiple lines
if (ec)
{
if (ec < MAX_ERR_MESSAGES)
cout << "Line " << line_num << ": " << C_ErrorMessages[ec] << '\n';
if (debug)
{
cout << "\nGenerated " << op.size() << " opcodes.\n";
OutputForthByteCode (&op);
}
}
else
{
if (debug) OutputForthByteCode (&op);
if (op.size())
{
ec = ForthVM (&op, &sp, &tp);
if (ec)
{
if (ec != 8) PrintVM_Error(ec);
// StackDump(cout);
}
else
cout << prompt;
}
}
op.erase(op.begin(), op.end());
}
}
//---------------------------------------------------------------
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