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tvdos: parsing pipe operator

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This commit is contained in:
minjaesong
2022-05-12 20:52:43 +09:00
parent 5b8930202f
commit 761f9b6264
1 changed files with 37 additions and 4 deletions
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41
assets/disk0/tvdos/bin/command.js
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@@ -138,14 +138,15 @@ shell.getPwdString = function() { return "\\" + (shell_pwd.concat([""])).join("\
shell.getCurrentDrive = function() { return CURRENT_DRIVE; }
// example input: echo "the string" > subdir\test.txt
shell.parse = function(input) {
var tokens = [];
var stringBuffer = "";
var mode = "LITERAL"; // LITERAL, QUOTE, ESCAPE, LIMBO
var i = 0
let tokens = [];
let stringBuffer = "";
let mode = "LITERAL"; // LITERAL, QUOTE, ESCAPE, LIMBO, OP
let i = 0
while (i < input.length) {
const c = input[i];
/*digraph g {
LITERAL -> QUOTE [label="\""]
LITERAL -> OP [label="pipe"]
LITERAL -> LIMBO [label="space"]
LITERAL -> LITERAL [label=else]
@@ -158,6 +159,11 @@ shell.parse = function(input) {
LIMBO -> LITERAL [label="not space"]
LIMBO -> QUOTE [label="\""]
LIMBO -> LIMBO [label="space"]
LIMBO -> OP [label="pipe"]
OP -> QUOTE [label="\""]
OP -> LIMBO [label="space"]
OP -> LITERAL [label=else]
}*/
if ("LITERAL" == mode) {
if (' ' == c) {
@@ -168,6 +174,10 @@ shell.parse = function(input) {
tokens.push(stringBuffer); stringBuffer = "";
mode = "QUOTE";
}
else if ('|' == c || '>' == c || '&' == c || '<' == c) {
tokens.push(stringBuffer); stringBuffer = "";
mode = "OP"
}
else {
stringBuffer += c;
}
@@ -176,6 +186,10 @@ shell.parse = function(input) {
if ('"' == c) {
mode = "QUOTE";
}
else if ('|' == c || '>' == c || '&' == c || '<' == c) {
mode = "OP"
stringBuffer += c
}
else if (c != ' ') {
mode = "LITERAL";
stringBuffer += c;
@@ -193,6 +207,23 @@ shell.parse = function(input) {
stringBuffer += c;
}
}
else if ("OP" == mode) {
if (' ' == c) {
tokens.push(stringBuffer); stringBuffer = "";
mode = "LIMBO";
}
else if ('|' == c || '>' == c || '&' == c || '<' == c) {
stringBuffer += c
}
else if ('"' == c) {
tokens.push(stringBuffer); stringBuffer = "";
mode = "QUOTE";
}
else {
tokens.push(stringBuffer); stringBuffer = "";
mode = "LITERAL";
}
}
else if ("ESCAPE" == mode) {
TODO();
}
@@ -204,6 +235,8 @@ shell.parse = function(input) {
tokens.push(stringBuffer);
}
println(tokens)
return tokens;
}
shell.resolvePathInput = function(input) {