134 lines
3.7 KiB
C
134 lines
3.7 KiB
C
/*
|
|
* Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $Id: interp_forth.c,v 1.4 1998/11/06 03:45:36 msmith Exp $
|
|
*/
|
|
|
|
#include <stand.h>
|
|
#include "bootstrap.h"
|
|
#include "ficl.h"
|
|
|
|
#define BFORTH_DEBUG
|
|
|
|
#ifdef BFORTH_DEBUG
|
|
# define DEBUG(fmt, args...) printf("%s: " fmt "\n" , __FUNCTION__ , ## args)
|
|
#else
|
|
# define DEBUG(fmt, args...)
|
|
#endif
|
|
|
|
/*
|
|
* BootForth Interface to Ficl Forth interpreter.
|
|
*/
|
|
|
|
static FICL_VM *bf_vm;
|
|
|
|
/*
|
|
* Shim for taking commands from BF and passing them out to 'standard'
|
|
* argv/argc command functions.
|
|
*/
|
|
static void
|
|
bf_command(FICL_VM *vm)
|
|
{
|
|
char *name, *line, *tail, *cp;
|
|
int len;
|
|
struct bootblk_command **cmdp;
|
|
bootblk_cmd_t *cmd;
|
|
int argc, result;
|
|
char **argv;
|
|
|
|
/* Get the name of the current word */
|
|
name = vm->runningWord->name;
|
|
|
|
/* Find our command structure */
|
|
cmd == NULL;
|
|
SET_FOREACH(cmdp, Xcommand_set) {
|
|
if (((*cmdp)->c_name != NULL) && !strcmp(name, (*cmdp)->c_name))
|
|
cmd = (*cmdp)->c_fn;
|
|
}
|
|
if (cmd == NULL)
|
|
panic("callout for unknown command '%s'", name);
|
|
|
|
/* Get remainder of invocation */
|
|
tail = vmGetInBuf(vm);
|
|
for (cp = tail, len = 0; *cp != 0 && *cp != '\n'; cp++, len++)
|
|
;
|
|
|
|
line = malloc(strlen(name) + len + 2);
|
|
strcpy(line, name);
|
|
if (len > 0) {
|
|
strcat(line, " ");
|
|
strncat(line, tail, len);
|
|
vmUpdateTib(vm, tail + len);
|
|
}
|
|
DEBUG("cmd '%s'", line);
|
|
|
|
command_errmsg = command_errbuf;
|
|
command_errbuf[0] = 0;
|
|
if (!parse(&argc, &argv, line)) {
|
|
result = (cmd)(argc, argv);
|
|
free(argv);
|
|
if (result != 0) {
|
|
strcpy(command_errmsg, vm->pad);
|
|
vmTextOut(vm, vm->pad, 1);
|
|
}
|
|
} else {
|
|
vmTextOut(vm, "parse error\n", 1);
|
|
}
|
|
free(line);
|
|
}
|
|
|
|
/*
|
|
* Initialise the Forth interpreter, create all our commands as words.
|
|
*/
|
|
void
|
|
bf_init(void)
|
|
{
|
|
struct bootblk_command **cmdp;
|
|
|
|
ficlInitSystem(4000); /* Default dictionary ~4000 cells */
|
|
bf_vm = ficlNewVM();
|
|
|
|
/* make all commands appear as Forth words */
|
|
SET_FOREACH(cmdp, Xcommand_set)
|
|
ficlBuild((*cmdp)->c_name, bf_command, FW_DEFAULT);
|
|
/* run the init word from softcore */
|
|
ficlExec(bf_vm, "init");
|
|
}
|
|
|
|
/*
|
|
* Feed a line of user input to the Forth interpreter
|
|
*/
|
|
void
|
|
bf_run(char *line)
|
|
{
|
|
int result;
|
|
|
|
result = ficlExec(bf_vm, line);
|
|
DEBUG("ficlExec '%s' = %d", line, result);
|
|
|
|
if (result == VM_USEREXIT)
|
|
panic("interpreter exit");
|
|
}
|