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/**
* Alee Forth: A portable and concise Forth implementation in modern C++.
* Copyright (C) 2023 Clyne Sullivan <clyne@bitgloo.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "alee.hpp"
#include "libalee/ctype.hpp"
#include "splitmemdict.hpp"
#include <msp430.h>
#include "core.fth.h"
static char strbuf[32];
static void readchar(State& state);
static void serput(int c);
static void serputs(const char *s);
static void printint(int n, char *buf);
int main()
{
WDTCTL = WDTPW | WDTHOLD;
DCOCTL = 0;
BCSCTL1 = CALBC1_1MHZ;
DCOCTL = CALDCO_1MHZ;
P1SEL |= BIT1 | BIT2;
P1SEL2 |= BIT1 | BIT2;
UCA0CTL1 = UCSWRST;
UCA0CTL1 |= UCSSEL_2;
UCA0BR0 = 104;
UCA0BR1 = 0;
UCA0MCTL = UCBRS0;
UCA0CTL1 &= (uint8_t)~UCSWRST;
__enable_interrupt();
static SplitMemDict<alee_dat_len> dict (alee_dat);
State state (dict, readchar);
serputs("alee forth\n\r");
auto ptr = strbuf;
while (1) {
if (IFG2 & UCA0RXIFG) {
char c = UCA0RXBUF;
serput(c);
if (c == '\r') {
*ptr = '\0';
serputs("\n\r");
if (auto r = Parser::parse(state, strbuf); r == Error::none) {
serputs(state.compiling() ? " compiled" : " ok");
} else {
switch (r) {
case Error::noword:
serputs("unknown word...");
break;
default:
serputs("error...");
break;
}
}
serputs("\n\r");
ptr = strbuf;
} else if (c == '\b') {
if (ptr > strbuf)
--ptr;
} else if (ptr < strbuf + sizeof(strbuf)) {
if (c >= 'A' && c <= 'Z')
c += 32;
*ptr++ = c;
}
}
}
}
static void readchar(State& state)
{
auto idx = state.dict.read(Dictionary::Input);
Addr addr = Dictionary::Input + sizeof(Cell) + idx;
while (!(IFG2 & UCA0RXIFG));
auto c = UCA0RXBUF;
if (isupper(c))
c += 32;
state.dict.writebyte(addr, c ? c : ' ');
}
void serput(int c)
{
while (!(IFG2 & UCA0TXIFG));
UCA0TXBUF = (char)c;
}
void serputs(const char *s)
{
while (*s)
serput(*s++);
}
void printint(int n, char *buf)
{
char *ptr = buf;
bool neg = n < 0;
if (neg)
n = -n;
do {
*ptr++ = (char)(n % 10) + '0';
} while ((n /= 10));
if (neg)
serput('-');
do {
serput(*--ptr);
} while (ptr > buf);
serput(' ');
}
void user_sys(State& state)
{
switch (state.pop()) {
case 0:
printint(state.pop(), strbuf);
break;
case 1:
serput(state.pop());
break;
case 2:
{ auto addr = state.pop();
*reinterpret_cast<uint8_t *>(addr) = state.pop(); }
break;
case 3:
state.push(*reinterpret_cast<uint8_t *>(state.pop()));
break;
default:
break;
}
}
extern "C" int atexit(void (*)()) { return 0; }
void operator delete(void *) {}
void operator delete(void *, std::size_t) {}
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