109 lines
2.6 KiB
Forth
109 lines
2.6 KiB
Forth
\ Copyright 2022 Bradley D. Nelson
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\
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\ Licensed under the Apache License, Version 2.0 (the "License");
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\ you may not use this file except in compliance with the License.
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\ You may obtain a copy of the License at
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\
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\ http://www.apache.org/licenses/LICENSE-2.0
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\
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\ Unless required by applicable law or agreed to in writing, software
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\ distributed under the License is distributed on an "AS IS" BASIS,
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\ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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\ See the License for the specific language governing permissions and
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\ limitations under the License.
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internals definitions
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( TODO: Figure out why this has to happen so late. )
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transfer internals-builtins
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forth definitions internals
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( Bring a forth to the top of the vocabulary. )
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: ok ." uEforth" raw-ok ;
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: jseval! ( a n index -- ) 0 call ;
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r|
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(function(sp) {
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var n = i32[sp>>2]; sp -= 4;
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var a = i32[sp>>2]; sp -= 4;
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var text = GetString(a, n);
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eval(text);
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return sp;
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})
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| 1 jseval!
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: jseval ( a n -- ) 1 call ;
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r"
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if (!globalObj['write']) {
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var con = document.createElement('pre');
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con.id = 'console';
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document.body.appendChild(con);
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window.inbuffer = [];
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window.outbuffer = '';
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window.onkeypress = function(e) {
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window.inbuffer.push(e.keyCode);
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};
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window.onkeydown = function(e) {
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if (e.keyCode == 8) {
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window.inbuffer.push(e.keyCode);
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}
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};
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}
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" jseval
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r|
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(function(sp) {
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var n = i32[sp>>2]; sp -= 4;
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var a = i32[sp>>2]; sp -= 4;
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if (globalObj['write']) {
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var text = GetString(a, n);
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write(text);
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} else {
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var con = document.getElementById('console');
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for (var i = 0; i < n; ++i) {
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var ch = u8[a + i];
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if (ch == 12) {
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window.outbuffer = '';
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} else if (ch == 8) {
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window.outbuffer = window.outbuffer.slice(0, -1);
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} else if (ch == 13) {
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} else {
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window.outbuffer += String.fromCharCode(ch);
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}
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}
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con.innerText = window.outbuffer + String.fromCharCode(0x2592);
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window.scrollTo(0, document.body.scrollHeight);
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}
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return sp;
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})
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| 2 jseval!
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: web-type ( a n -- ) 2 call yield ;
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' web-type is type
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(function(sp) {
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if (window.inbuffer.length) {
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sp += 4; i32[sp>>2] = window.inbuffer.shift();
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} else {
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sp += 4; i32[sp>>2] = 0;
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}
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return sp;
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})
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| 3 jseval!
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: web-key ( -- n ) begin yield 3 call dup if exit then drop again ;
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' web-key is key
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r|
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(function(sp) {
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sp += 4; i32[sp>>2] = window.inbuffer.length ? -1 : 0;
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return sp;
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})
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| 4 jseval!
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: web-key? ( -- f ) yield 4 call ;
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' web-key? is key?
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: page 12 emit ;
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transfer forth
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forth
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ok
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