You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
'use strict'
-let txtdiv = document.createElement("div")
-document.body.appendChild(txtdiv)
-const output = {
- print: (string) => txtdiv.textContent += string
-}
-let wasmMem
-let forth
+const initialize = Promise.all([
+ fetch('forth.forth', {credentials: 'include', headers:{'content-type':'text/plain'}}).then((re) => re.text()),
+ fetch('forth.wasm', {credentials: 'include', headers:{'content-type':'application/wasm'}}).then(re => re.arrayBuffer())
+])
+window.onload = () => {
+ /* Initialize Views */
+ let forthdiv = document.getElementById("forth")
+ if (forthdiv === null) {
+ forthdiv = document.createElement("div")
+ forthdiv.setAttribute("style","height:100%;margin:auto;width:100%;max-width:640px;overflow-x:hidden;")
+ document.body.appendChild(forthdiv)
+ }
+ const outframe = document.createElement("div")
+ outframe.setAttribute("style", "background-color:black;padding-left:6px;padding-right:6px;color:chartreuse;height:268px;resize:vertical;display:flex;align-items:flex-end;flex-flow:row;")
+ const stackview = document.createElement("pre")
+ stackview.setAttribute("style", "white-space:pre-wrap;flex:0 0 8%;")
+ outframe.appendChild(stackview)
+ const txtoutput = document.createElement("pre")
+ txtoutput.setAttribute("style", "white-space:pre-wrap;max-height:256px;overflow-y:scroll;flex:1 0 342px;")
+ outframe.appendChild(txtoutput)
+ /* const rstackview = document.createElement("pre")
+ rstackview.setAttribute("style", "white-space:pre-wrap;flex:0 1 8%;")
+ outframe.appendChild(rstackview) */
+ const memview = document.createElement("pre")
+ memview.setAttribute("style", "padding-left: 8px; white-space:pre-wrap;flex:0 0 88px;")
+ outframe.appendChild(memview)
+ const txtinput = document.createElement("textarea")
+ txtinput.setAttribute("autofocus", "true")
+ txtinput.setAttribute("wrap", "hard")
+ txtinput.setAttribute("style", "resize:none;white-space:pre;margin-left:8%;width:75%;")
+ txtinput.oninput = () => txtinput.setAttribute("rows", ((txtinput.value.match(/[\n]/g) || [1]).length + 1).toString());
+ txtinput.oninput()
+ forthdiv.appendChild(outframe)
+ forthdiv.appendChild(txtinput)
-/* Input capture */
-let stdin = ""
-document.addEventListener('keydown', (event) => {
- console.log(`keydown: ${event.key}`)
- if (event.key != "F5") {
- event.preventDefault()
- event.stopPropagation()
+ /* Initialize State */
+ const simstack = []
+ const rstack = []
+ let wasmMem
+ let forth
+ const dictionary = { EXECUTE: 12 }
+ const doesDictionary = {}
+
+ /* Environment functions */
+ const output = {
+ print: (string) => txtoutput.textContent += `\\\ => ${string} \n`
+ }
+ const wasmString = (addr, u) =>
+ String.fromCharCode.apply(
+ null,
+ new Uint16Array(wasmMem.buffer, addr, u >> 1)
+ )
+ const updateViews = () => {
+ const base = new DataView(wasmMem.buffer, 14348 /* base */, 4).getUint32(0,true)
+ stackview.textContent = simstack.map((v) => v.toString(base)).join('\n')
+ // rstackview.textContent = rstack.join('\n')
+ let cnt = 0;
+ const maxBytes = 64
+ let here = new DataView(wasmMem.buffer, 14340 /* here */, 4).getUint32(0,true)
+ memview.textContent = Array.from(new Uint8Array(wasmMem.buffer, here - maxBytes, maxBytes), (v) => {
+ cnt++;
+ v = ('0' + (v & 0xFF).toString(16)).slice(-2)
+ if (cnt === maxBytes)
+ return v
+ if ((cnt % 16) === 0)
+ return `${v}\n=> ${(here -maxBytes + cnt).toString(base)}\n`
+ if ((cnt % 4) === 0)
+ return `${v}\n`
+ return `${v} `
+ }).join('')
+ outframe.scrollTop = outframe.scrollHeight
+ }
+
+ /* Input capture */
+ let stdin = ""
+ txtinput.addEventListener('keydown', (event) => {
switch (event.key) {
case "Enter":
- txtdiv = document.createElement("div")
- document.body.appendChild(txtdiv)
- forth()
- output.print("ok.")
- txtdiv = document.createElement("div")
- document.body.appendChild(txtdiv)
+ if (event.ctrlKey) {
+ const endPos = txtinput.selectionStart + 1
+ txtinput.value =
+ txtinput.value.substring(0, txtinput.selectionStart) +
+ '\n' +
+ txtinput.value.substring(txtinput.selectionEnd, txtinput.value.length)
+ txtinput.setSelectionRange(endPos, endPos)
+ txtinput.oninput()
+ }
+ else {
+ stdin += txtinput.value
+ txtoutput.textContent += txtinput.value
+ if (!/\s/.test(txtinput.value.slice(-1)))
+ txtoutput.textContent += " "
+ txtinput.value = ""
+ event.preventDefault()
+ event.stopPropagation()
+ forth()
+ updateViews()
+ txtoutput.scrollTop = txtoutput.scrollHeight
+ }
break
case "Backspace":
- stdin = stdin.substring(0, stdin.length - 1)
- txtdiv.textContent = txtdiv.textContent.substring(0, txtdiv.textContent.length - 1)
break
default:
- if (event.key.length == 1) {
- stdin += event.key
- output.print(event.key)
- }
break
}
- }
-})
-
-const channels = [{
- read: (writeAddr, maxBytes) => {
- const maxChars = maxBytes >> 1
- const bufView = new Uint16Array(wasmMem.buffer, writeAddr, maxChars)
- let i
- for (i = 0; i < maxChars && i < stdin.length; i++)
- bufView[i] = stdin.charCodeAt(i)
- stdin = stdin.substring(maxChars)
- return i << 1
- },
- write: (readAddr, maxBytes) =>
- output.print(String.fromCharCode.apply(
- null,
- new Uint16Array(wasmMem.buffer, readAddr, maxBytes >> 1)
- ))
-}]
-const simstack = []
-const rstack = []
-const dictionary = {
- ';': 1,
- 'LIT': 2,
- RINIT: 3,
- WORD: 16500,
- KEY: 5,
- DUP: 6,
- '+': 7,
- 'NOOP2': 8,
- '.': 9,
- '@': 10,
- '!': 11,
- EXECUTE: 12,
- NOOP: 13,
- 'JZ:': 14,
- 'JNZ:': 15,
- DROP: 16,
- 'WS?': 17,
- 'JMP:': 18,
- 'WPUTC': 19,
- 'WB0': 20,
- 'FIND': 21,
- 'NUMBER': 22,
- 'W!LEN': 23,
- 'J-1:': 24,
- 'BYE': 25,
- 'SWAP': 26,
- 'WORDS': 27,
- 'HERE': 28,
- 'DEFINE': 29,
- '2DUP': 30,
- 'ROT': 31,
- '2DROP': 32,
- ',': 33,
- '-': 34,
- 'CHANNEL!': 35,
- 'HERE!': 36,
- '=?': 37,
- '.s': 38,
- ':': 16800,
- 'MODE': 14336,
- 'EXECUTE-MODE': 16680,
- 'QUIT': 16384,
- 'INTERPRET': 16400
-}
-const wasmImport = {
- env: {
- pop: () => simstack.pop(),
- push: (val) => simstack.push(val),
- rinit: () => rstack.length = 0,
- rpop: () => rstack.pop(),
- rpush: (val) => rstack.push(val),
- sys_write: (channel, addr, u) => {
- if (channels[channel] === undefined)
- return
- console.log(`write ch:${channel} addr:${addr} len:${u}`)
- channels[channel].write(addr, u)
- },
- sys_read: (channel, toBuffer) => {
- console.log(`read ch:${channel} buf:${toBuffer} current: ${stdin}`)
- const lenView = new DataView(wasmMem.buffer, toBuffer, 8)
- const maxBytes = lenView.getUint32(0,true)
- console.log(`read blen:${lenView.getUint32(0,true)} cstrlen:${lenView.getUint32(4,true)}`)
- /* If the channel is undefined, or if there isn't enough room in
- * toBuffer for even one character, then, if there is enough
- * room for an int write a zero, exit */
- if (channels[channel] === undefined || maxBytes < 6) {
- if (maxBytes >= 4)
- lenView.setUint32(4,0,true)
- }
- const numBytes = channels[channel].read(toBuffer + 8, maxBytes - 4)
- lenView.setUint32(4,numBytes,true);
- console.log(`read wrote ${lenView.getUint32(4,true)} bytes, remainder: ${stdin}`)
- console.log(`read blen:${lenView.getUint32(0,true)} cstrlen:${lenView.getUint32(4,true)}`) },
- sys_listen: (reqAddr, cbAddr) => {
- //TODO: call into the module to wasm fn "event" to push an event
- //to forth, which pushes esi to the return stack and queues the
- //callback function provided from listen. reqaddr could be
- //"fetch", in which case no channel is used. otherwise very
- //similar to sys_fetch.
- },
- sys_fetch: (channel, reqAddr) => {
- //TODO: map to fetch promise, write to channel buffer,
- //javascript "fetch" as fallback, explicit handles for
- //"textEntry" or any third party protocols like activitypub
- console.log(`fetch ${channel} ${reqAddr}`)
+ })
+ const channels = [{
+ read: (writeAddr, maxBytes) => {
+ const maxChars = maxBytes >> 1
+ const bufView = new Uint16Array(wasmMem.buffer, writeAddr, maxChars)
+ let i
+ for (i = 0; i < maxChars && i < stdin.length; i++)
+ bufView[i] = stdin.charCodeAt(i)
+ stdin = stdin.substring(maxChars)
+ return i << 1
},
- sys_echo: (val) => output.print(`${val} `),
- sys_echochar: (val) => output.print(String.fromCharCode(val)),
- sys_reflect: (addr) => {
- console.log(`reflect: ${addr}: ${
+ write: (readAddr, maxBytes) =>
+ output.print(String.fromCharCode.apply(
+ null,
+ new Uint16Array(wasmMem.buffer, readAddr, maxBytes >> 1)
+ ))
+ }]
+
+ /* System runtime */
+ const wasmImport = {
+ env: {
+ pop: () => simstack.pop(),
+ push: (val) => simstack.push(val),
+ rinit: () => rstack.length = 0,
+ rpop: () => rstack.pop(),
+ rpush: (val) => rstack.push(val),
+ sys_write: (channel, addr, u) => channels[channel] === undefined ? 0 : channels[channel].write(addr, u),
+ sys_read: (channel, addr, u) => channels[channel] === undefined ? 0 : channels[channel].read(addr, u),
+ sys_listen: (reqAddr, cbAddr) => {
+ //TODO: call into the module to wasm fn "event" to push an event
+ //to forth, which pushes esi to the return stack and queues the
+ //callback function provided from listen. reqaddr could be
+ //"fetch", in which case no channel is used. otherwise very
+ //similar to sys_fetch.
+ },
+ sys_fetch: (channel, reqAddr) => {
+ //TODO: map to fetch promise, write to channel buffer,
+ //javascript "fetch" as fallback, explicit handles for
+ //"textEntry" or any third party protocols like activitypub
+ console.log(`fetch ${channel} ${reqAddr}`)
+ },
+ sys_echo: (val, base) => output.print(`${val.toString(base)} `),
+ sys_echochar: (val) => output.print(String.fromCharCode(val)),
+ sys_reflect: (addr) => {
+ console.log(`reflect: ${addr}: ${
new DataView(wasmMem.buffer, addr, 4)
.getUint32(0,true)
}`)
- },
- vocab_get: (addr, u) => {
- const word = String.fromCharCode.apply(
- null,
- new Uint16Array(wasmMem.buffer, addr, u >> 1)
- )
- const answer = dictionary[word.toUpperCase()]
- console.log(`vocab_get ${word}: ${answer}`)
- if (answer === undefined)
- return 0
- return answer
- },
- vocab_set: (addr, u, num) => {
- console.log(`vocab set ${addr} ${u} ${num}`)
- const word = String.fromCharCode.apply(
- null,
- new Uint16Array(wasmMem.buffer, addr, u >> 1)
- )
- console.log(`vocab_set ${word}: ${num}`)
- dictionary[word.toUpperCase()] = num
- return 0
- },
- is_whitespace: (key) => /\s/.test(String.fromCharCode(key)),
- sys_stack: () => console.log(`[${simstack}]`),
- sys_parsenum: (addr, u, base) => {
- const word = String.fromCharCode.apply(
- null,
- new Uint16Array(wasmMem.buffer, addr, u >> 1)
- )
- const answer = Number.parseInt(word, base)
- console.log(`parsenum: ${addr} ${u} ${base}`)
- console.log(`parsenum: ${word} ${answer}`)
- console.log(`parsenum: ${Number.isNaN(answer)}`)
- if (Number.isNaN(answer))
- return -1
- new DataView(wasmMem.buffer, addr, 4).setUint32(0,answer,true)
- return 0
- },
- sys_words: () => {
- output.print(Object.getOwnPropertyNames(dictionary).toString().split(',').join(' '))
+ },
+ vocab_get: (addr, u) => dictionary[wasmString(addr, u).toUpperCase()] || 0,
+ vocab_set: (addr, u, v) => dictionary[wasmString(addr, u).toUpperCase()] = v,
+ does_get: (addr, u) => doesDictionary[wasmString(addr, u).toUpperCase()] || 0,
+ does_set: (addr, u, v) => doesDictionary[wasmString(addr, u).toUpperCase()] = v,
+ is_whitespace: (key) => /\s/.test(String.fromCharCode(key)),
+ sys_stack: () => console.log(`[${simstack}][${rstack}]`),
+ sys_parsenum: (addr, u, base) => {
+ const answer = Number.parseInt(wasmString(addr, u), base)
+ if (Number.isNaN(answer))
+ return -1
+ new DataView(wasmMem.buffer, addr, 4).setUint32(0,answer,true)
+ return 0
+ },
+ sys_words: () => {
+ output.print(Object.getOwnPropertyNames(dictionary).toString().split(',').join(' '))
+ }
}
}
-}
-
-fetch('forth.forth').then((re) => re.text()).then((txt) => {
- stdin = txt
- fetch('forth.wasm')
- .then(re => re.arrayBuffer())
- .then(buf => WebAssembly.instantiate(buf, wasmImport))
- .then(result => {
- wasmMem = result.instance.exports.memory
- forth = result.instance.exports.main
- console.log('wasm loaded');
- forth()
+ initialize.then((results) => {
+ stdin = results[0]
+ WebAssembly.instantiate(results[1], wasmImport).then((module) => {
+ wasmMem = module.instance.exports.memory
+ forth = module.instance.exports.main
+ console.log('wasm loaded')
+ forth()
+ updateViews()
+ })
})
-})
+}
projects / watForth.git / blobdiff