quotes now work

This commit is contained in:
overflowerror 2022-04-07 21:36:39 +02:00
parent 2680edc356
commit ee50ccdbc5

View file

@ -14,6 +14,12 @@
return {
add: c => commands.push(c),
execute: (std) => commands.forEach(c => c.execute(std)),
toString: () => "sequence {\n" + commands
.map(c => c.toString())
.map(s => s.split("\n"))
.map(a => a.map(s => " " + s))
.map(a => a.join("\n"))
.join(",\n") + "\n}",
}
}
@ -26,6 +32,12 @@
let evaluatedArgs = args.map(a => a.evaluate());
executeCommand(evaluatedArgs, std);
},
toString: () => "command {\n" + args
.map(a => a.toString())
.map(s => s.split("\n"))
.map(a => a.map(s => " " + s))
.map(a => a.join("\n"))
.join(",\n") + "\n}",
};
}
@ -35,21 +47,41 @@
setValue: v => { value = v; },
execute: (std) => {
variables[name] = value.evaluate();
}
},
toString: () => `assign '${name}'=\n${value.toString().split('\n').map(l => " " + l).join("\n")}`,
};
}
function astValueCompound() {
let components = [];
return {
const self = {
add: c => components.push(c),
evaluate: () => components.map(c => c.evaluate()).join(""),
toString: () => "compound {\n" + components
.map(a => a.toString())
.map(s => s.split("\n"))
.map(a => a.map(s => " " + s))
.map(a => a.join("\n"))
.join(",\n") + "\n}",
reduce: () => {
if (components.length == 1) {
if (components[0].reduce) {
return components[0].reduce();
} else {
return components[0];
}
} else {
return self;
}
},
};
return self;
}
function astValueString(str) {
return {
evaluate: () => str,
toString: () => "'" + str + "'",
};
}
@ -57,6 +89,7 @@
return {
// add support for multiple arguments in one variable
evaluate: () => variables[name],
toString: () => `var '${name}'`,
}
}
@ -65,6 +98,7 @@
evaluate: () => {
// TODO
},
toString: () => "not implemented",
};
}
@ -73,6 +107,7 @@
evaluate: () => {
// TODO
},
toString: () => "not implemented",
};
}
@ -84,6 +119,127 @@
throw `${file}: line ${line}: syntax error: ${message}`;
}
function findSymbolInScope(content, line, symbol, startPosition, length) {
let scopeStack = [];
for (let i = startPosition; i < length; i++) {
const c = content[i];
if (c == '\n') {
line++;
}
if (scopeStack.length == 0) {
if (c == symbol) {
return i;
} else if (c == '"') {
scopeStack.push('"');
} else if (c == '$' && i < length - 1 && content[i + 1] == '(') {
i++;
scopeStack.push(')');
} else if (c == '`') {
scopeStack.push('`');
} else if (c == "'") {
scopeStack.push("'");
} else {
// continue
}
} else {
const top = scopeStack[scopeStack.length - 1];
if (c == top) {
scopeStack.pop();
} else if (top == '"' && c == '$' && i < length - 1 && content[i + 1] == '(') {
i++;
scopeStack.push(')');
} else if (top == '"' && c == '`') {
scopeStack.push('`');
} else if (top == ')' || top == '`') {
if (c == '"') {
scopeStack.push('"');
} else if (c == "'") {
scopeStack.push("'");
} else {
// continue
}
} else {
// continue
}
}
}
syntaxError(line, "unexpected end of file");
}
function doubleQuoteToAst(quoteContent, line) {
const length = quoteContent.length;
let astRoot = astValueCompound();
let buffer = "";
const QS_INIT = 0;
const QS_VARIABLE = 1;
const QS_SUBSTITUTION = 2;
let state = QS_INIT;
for (let i = 0; i < length; i++) {
const c = quoteContent[i];
if (c == '\n') {
line++;
}
switch(state) {
case QS_INIT:
if (c == '$') {
astRoot.add(astValueString(buffer));
buffer = "";
if (i < length - 1 && quoteContent[i + 1] == '(') {
state = QS_SUBSTITUTION;
i += 1;
} else {
state = QS_VARIABLE;
}
} else {
buffer += c;
}
break;
case QS_VARIABLE:
if (!("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789".includes(c))) {
astRoot.add(astValueVar(buffer));
buffer = "";
state = QS_INIT;
i--;
} else {
buffer += c;
}
break;
case QS_SUBSTITUTION:
throw "not implemented";
break;
default:
panic(line, "unknown parse state");
break;
}
}
if (buffer) {
switch(state) {
case QS_INIT:
astRoot.add(astValueString(buffer));
break;
case QS_VARIABLE:
astRoot.add(astValueVar(buffer));
break;
case QS_SUBSTITUTION:
throw "not implemented";
break;
default:
panic(line, "unknown parse state");
break;
}
}
return astRoot;
}
function parseCommands(content) {
let line = 1;
@ -94,6 +250,7 @@
let astRoot = astSequence();
let current = null;
let value = null;
let state = PS_INIT;
let buffer = "";
@ -121,7 +278,18 @@
case PS_COMMAND:
// check for escape and quotes
if (c == ';' || c == '\n') {
if (value) {
if (buffer) {
if (buffer[0] == '$') {
value.add(astValueVar(buffer.substring(1)));
} else {
value.add(astValueString(buffer));
}
buffer = "";
}
current.add(value.reduce());
value = null;
} else if (buffer) {
if (buffer[0] == '$') {
current.add(astValueVar(buffer.substring(1)));
} else {
@ -133,7 +301,18 @@
current = null;
state = PS_INIT;
} else if (c == ' ' || c == '\t') {
if (value) {
if (buffer) {
if (buffer[0] == '$') {
value.add(astValueVar(buffer.substring(1)));
} else {
value.add(astValueString(buffer));
}
buffer = "";
}
current.add(value.reduce());
value = null;
} else if (buffer) {
if (buffer[0] == '$') {
current.add(astValueVar(buffer.substring(1)));
} else {
@ -141,6 +320,25 @@
}
buffer = "";
}
} else if (c == '"') {
if (!value) {
value = astValueCompound();
}
if (buffer) {
value.add(astValueString(buffer));
buffer = "";
}
const end = findSymbolInScope(content, line, '"', i + 1, length);
const ast = doubleQuoteToAst(content.substring(i + 1, end), line);
value.add(ast);
i = end;
} else if (c == "'") {
const end = findSymbolInScope(content, line, "'", i + 1, length);
buffer += content.substring(i + 1, end);
i = end;
} else if (c == '=' && current.size() == 0) {
current = astAssignment(buffer);
state = PS_ASSIGN;
@ -152,15 +350,48 @@
case PS_ASSIGN:
// check for escape and quotes
if (c == ';' || c == '\n') {
if (value) {
if (buffer) {
if (buffer[0] == "$") {
value.add(astValueVar(buffer.substring(1)));
} else {
value.add(astValueString(buffer));
}
}
current.setValue(value.reduce());
value = null;
} else if (buffer) {
if (buffer[0] == "$") {
current.setValue(astValueVar(buffer.substring(1)));
} else {
current.setValue(astValueString(buffer));
}
} else {
current.setValue(astValueString(""));
}
buffer = "";
astRoot.add(current);
current = null;
state = PS_INIT;
} else if (c == '"') {
if (!value) {
value = astValueCompound();
}
if (buffer) {
value.add(astValueString(buffer));
buffer = "";
}
const end = findSymbolInScope(content, line, '"', i + 1, length);
const ast = doubleQuoteToAst(content.substring(i + 1, end), line);
value.add(ast);
i = end;
} else if (c == "'") {
const end = findSymbolInScope(content, line, "'", i + 1, length);
buffer += content.substring(i + 1, end);
i = end;
} else if (c == ' ' || c == '\t') {
// would normale set exported variable for command but we don't support that anyway
// current.setValue(astValueString(buffer));