example http parser
This commit is contained in:
cozis
@@ -0,0 +1,41 @@
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fun compareLists(a: List, b: List) {
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len = count(a);
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if len != count(b):
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return false;
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i = 0;
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while i < len: {
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if a[i] != b[i]:
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return false;
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i = i+1;
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}
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return true;
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}
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fun compareMaps(a: Map, b: Map) {
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keys = keysof(a);
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len = count(keys);
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if len != count(b):
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return false;
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i = 0;
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while i < len: {
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k = keys[i];
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if a[k] != b[k]:
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return false;
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i = i+1;
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}
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return true;
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}
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fun compareAny(a, b) {
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Ta = type(a);
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Tb = type(b);
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if Ta != Tb:
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return false;
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if Ta == List:
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return compareLists(a, b);
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if Ta == Map:
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return compareMaps(a, b);
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return a == b;
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}
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@@ -0,0 +1,383 @@
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scan = import("scan.noja");
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newScanner = scan.newScanner;
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Scanner = scan.Scanner;
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hint = scan.hint;
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consume = scan.consume;
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current = scan.current;
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isDigit = scan.isDigit;
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consumeSpaces = scan.consumeSpaces;
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fun isAlpha(char: String)
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return (string.ord(char) >= string.ord('a') and string.ord(char) <= string.ord('z'))
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or (string.ord(char) >= string.ord('A') and string.ord(char) <= string.ord('Z'));
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fun isUpper(char: String)
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return string.ord(char) >= string.ord('A')
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and string.ord(char) <= string.ord('Z');
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fun isUnreserved(char: String)
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return isAlpha(char)
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or isDigit(char)
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or char == "-"
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or char == "."
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or char == "_"
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or char == "~";
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fun isSubdelim(char: String)
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return char == "!" or char == "$"
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or char == "&" or char == "'"
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or char == "(" or char == ")"
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or char == "*" or char == "+"
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or char == "," or char == ";"
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or char == "=";
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fun isPChar(char: String)
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return isUnreserved(char)
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or isSubdelim(char)
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or char == ":"
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or char == "@";
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fun parseMethod(scan: Scanner) {
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char = current(scan);
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if char == none or not isUpper(char):
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return none, "Missing method";
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method = "";
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do {
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method = string.cat(method, char);
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consume(scan);
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char = current(scan);
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} while char != none and isUpper(char);
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return method, none;
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}
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fun parsePort(scan: Scanner) {
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port = none;
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char = current(scan);
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if char == ":" and isDigit(hint(scan, 1)): {
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consume(scan); # Skip the ":"
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char = current(scan);
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port = 0;
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do {
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digit = string.ord(char)
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- string.ord("0");
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port = port * 10 + digit;
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consume(scan);
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char = current(scan);
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} while char != none and isDigit(char);
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}
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return port;
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}
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fun isHostname(char: String)
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return isUnreserved(char)
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or isSubdelim(char);
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fun parseHost(scan: Scanner) {
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char = current(scan);
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if char == none:
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return none, "Missing host";
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if not isHostname(char):
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return none, "Invalid character in place of host";
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name = "";
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do {
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name = string.cat(name, char);
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consume(scan);
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char = current(scan);
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} while char != none and isHostname(char);
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port = parsePort(scan);
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return {name: name, port: port};
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}
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fun parsePath(scan: Scanner) {
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path = "";
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char = current(scan);
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if char != none and char == "/": {
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path = string.cat(path, char);
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consume(scan);
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char = current(scan);
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} else {
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if char == none or not isPChar(char):
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return none, "Invalid character in place of path";
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}
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while char != none and isPChar(char): {
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do {
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path = string.cat(path, char);
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consume(scan);
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char = current(scan);
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} while char != none and isPChar(char);
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if char == none or char != "/":
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break;
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path = string.cat(path, char);
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consume(scan);
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char = current(scan);
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}
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return path;
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}
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fun isQuery(char: ?String) {
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if char == none:
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return false;
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return isPChar(char)
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or char == "/"
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or char == "?";
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}
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fun parseQuery(scan: Scanner) {
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char = current(scan);
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if char != none and char == "?": {
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consume(scan); # Consume the "?"
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query = "";
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while isQuery(char = current(scan)): {
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query = string.cat(query, char);
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consume(scan);
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}
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} else
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query = none;
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return query;
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}
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fun isFragment(char: ?String) {
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if char == none:
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return false;
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return isPChar(char) or char == "/";
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}
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fun parseFragment(scan: Scanner) {
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char = current(scan);
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if char != none and char == "#": {
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consume(scan); # Consume the "#"
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fragment = "";
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while isFragment(char = current(scan)): {
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fragment = string.cat(fragment, char);
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consume(scan);
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}
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} else
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fragment = none;
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return fragment;
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}
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Host = { name: String, port: ?int };
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URL = {
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schema: ?String,
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host: ?Host,
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path: ?String,
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query: ?String,
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fragment: ?String
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};
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fun isSchemaFirst(char: ?String) {
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return char != none and isAlpha(char);
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}
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fun isSchema(char: ?String)
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return char != none
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and (isAlpha(char)
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or isDigit(char)
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or char == "+"
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or char == "-"
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or char == ".");
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fun parseSchema(scan: Scanner) {
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char = current(scan);
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schema = none;
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if isSchemaFirst(char): {
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start = scan.i;
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schema = "";
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do {
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schema = string.cat(schema, char);
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consume(scan);
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char = current(scan);
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} while isSchema(char);
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if char == ":":
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consume(scan);
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else {
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schema = none;
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scan.i = start;
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}
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}
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return schema;
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}
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fun followsAuthority(scan: Scanner)
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return current(scan) == "/" and hint(scan, 1) == "/";
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fun parseURL(scan: Scanner) {
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schema = parseSchema(scan);
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if followsAuthority(scan): {
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consume(scan, 2);
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host, error = parseHost(scan);
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if error != none:
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return none, error;
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path = none;
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if current(scan) == "/":
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path = parsePath(scan);
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} else {
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host = none;
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char = current(scan);
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if char == none or char == "?" or char == "#":
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return none, "Missing path";
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path, error = parsePath(scan);
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if error != none:
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return none, error;
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}
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query = parseQuery(scan);
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fragment = parseFragment(scan);
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print(scan);
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return {
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host : host,
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path : path,
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query : query,
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schema : schema,
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fragment: fragment
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};
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}
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fun parseVersion(scan: Scanner) {
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if hint(scan, 0) != "H" or hint(scan, 1) != "T"
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or hint(scan, 2) != "T" or hint(scan, 3) != "P"
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or hint(scan, 4) != "/" or not isDigit(hint(scan, 5)):
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return none, "Invalid version token";
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consume(scan, 5);
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major = string.ord(current(scan))
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- string.ord("0");
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if hint(scan, 1) != "." and isDigit(hint(scan, 2)): {
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consume(scan, 2);
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minor = string.ord(current(scan))
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- string.ord("0");
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} else
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minor = 0;
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consume(scan);
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return {major: major, minor: minor};
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}
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Version = {
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major: int,
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minor: int
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};
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Request = {
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method : String,
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url : URL,
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version: Version
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};
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fun newRequest(method: String, url: URL,
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version: Version, headers: Map = {})
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return {
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method: method,
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url: url,
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version: version,
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headers: headers
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};
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fun parse(src: String) {
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scan = newScanner(src);
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method, error = parseMethod(scan);
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if error != none:
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return none, error;
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char = current(scan);
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if char == none or char != " ":
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return none, "Missing space after method";
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consume(scan);
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url, error = parseURL(scan);
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if error != none:
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return none, error;
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char = current(scan);
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if char != " ":
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return none, "Missing space after URL";
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consume(scan);
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version, error = parseVersion(scan);
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if error != none:
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return none, error;
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if hint(scan, 0) != "\r" or hint(scan, 1) != "\n":
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# Request with no headers or body
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return newRequest(method, url, version);
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consume(scan, 2); # Consume the "\r\n"
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headers = {};
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while (char = hint(scan, 0)) != none and (char != "\r" or hint(scan, 1) != "\n"): {
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# Header name until the next ":"
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name = "";
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do {
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name = string.cat(name, char);
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consume(scan);
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char = current(scan);
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} while char != ":" and char != none;
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if char == none:
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return none, "Invalid header (missing \":\" after name)";
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consume(scan);
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consumeSpaces(scan);
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char = current(scan);
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# Header body until \r
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body = "";
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do {
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body = string.cat(body, char);
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consume(scan);
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char = current(scan);
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} while char != "\r" and char != none;
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headers[name] = body;
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}
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if char != none:
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consume(scan, 2); # Consume the final "\r\n"
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return newRequest(method, url, version, headers);
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}
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sample = string.cat(
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"GET /search?client=firefox-b-d&q=http+request+dataset HTTP/2\r\n",
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"Host: www.google.com\r\n",
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"user-agent: curl/7.84.0\r\n",
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"accept: */*\r\n",
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"\r\n");
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request, error = parse(sample);
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print("request=", request, "\n");
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print("error=", error, "\n");
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@@ -1,49 +1,12 @@
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scan = import("scan.noja");
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Scanner = {src: String, i: int};
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fun newScanner(src: String) {
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scan = {src: src, i: 0};
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assert(istypeof(Scanner, scan));
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return scan;
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}
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fun isDigit(char: ?String) {
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if char == none:
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return false;
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return string.ord(char) >= string.ord('0')
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and string.ord(char) <= string.ord('9');
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}
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fun isSpace(c: String)
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return c == ' '
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or c == '\t'
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or c == '\n';
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fun min(x, y) {
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if x < y:
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return x;
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return y;
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}
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fun hint(scan: Scanner, n: int = 1) {
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k = scan.i + n;
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if k < count(scan.src):
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return scan.src[k];
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return none;
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}
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fun current(scan: Scanner)
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return hint(scan, 0);
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fun consume(scan: Scanner, n: int = 1) {
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assert(n > 0);
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limit = count(scan.src);
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scan.i = min(scan.i + n, limit);
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}
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fun consumeSpaces(scan: Scanner)
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while isSpace(current(scan)):
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consume(scan);
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newScanner = scan.newScanner;
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Scanner = scan.Scanner;
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hint = scan.hint;
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consume = scan.consume;
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current = scan.current;
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consumeSpaces = scan.consumeSpaces;
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isDigit = scan.isDigit;
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fun parseString(scan: Scanner) {
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@@ -301,4 +264,83 @@ fun parse(src: String) {
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scan = newScanner(src);
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val, err = parseValue(scan);
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return val, err;
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}
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fun test() {
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compareAny = import("compare.noja").compareAny;
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Error = String;
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JSONValueType = (bool | float | String | Map | List | None);
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TestCase = [String, ?JSONValueType, ?Error];
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fun runAllTestCases(test_cases: List) {
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total = count(test_cases);
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passed = 0;
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evaluated = 0;
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while evaluated < total: {
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test_case = test_cases[evaluated];
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input = test_case[0];
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expres = test_case[1]; # Expected result
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experr = test_case[2]; # Expected error
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res, err = parse(input);
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#print("res=", res, ", err=", err, "\n");
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#print("expres=", expres, ", experr=", experr, "\n");
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result = compareAny(res, expres)
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and compareAny(err, experr);
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if result: {
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print("Test ", evaluated, ": PASSED\n");
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passed = passed+1;
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} else {
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print("Test ", evaluated, ": FAILED\n");
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print("\tInput:\n");
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print("\t\t", input, "\n");
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if experr == none: {
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if err == none:
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print("\tGot result ", res, " but was expected ", expres, "\n");
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else
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print("\tFailed unexpectedly [", err, "]\n");
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} else if err == none:
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print("\tSucceded unexpectedly. Was expected error [", experr, "]\n");
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else
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print("\tWas expected error [", experr, "], but got [", err, "]\n");
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}
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evaluated = evaluated+1;
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}
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return passed, (total-passed), total;
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}
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fun newPassingTestCase(src: String, res: JSONValueType)
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return [src, res, none];
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fun newFailingTestCase(src: String, err: String)
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return [src, none, err];
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test_cases = [
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newPassingTestCase("null", none),
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newPassingTestCase("true", true),
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newPassingTestCase("false", false),
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newPassingTestCase("\"Hello, world!\"", "Hello, world!"),
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newPassingTestCase("1", 1.0),
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newPassingTestCase("2.3", 2.3),
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newPassingTestCase("[]", []),
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newPassingTestCase("[1]", [1.0]),
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newPassingTestCase("[1, 2]", [1.0, 2.0]),
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newPassingTestCase("[1, 2, 3]", [1.0, 2.0, 3.0]),
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newPassingTestCase("{}", {}),
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newPassingTestCase("{\"k1\": true}", {k1: true}),
|
||||
newPassingTestCase("{\"k1\": true, \"k2\": false}", {k1: true, k2: false})
|
||||
];
|
||||
|
||||
passed, failed, total = runAllTestCases(test_cases);
|
||||
print("passed: ", passed, "\n");
|
||||
print("failed: ", failed, "\n");
|
||||
print(" total: ", total, "\n");
|
||||
}
|
||||
@@ -1,122 +0,0 @@
|
||||
json = import("json.noja");
|
||||
|
||||
Error = String;
|
||||
JSONValueType = (bool | float | String | Map | List | None);
|
||||
TestCase = [String, ?JSONValueType, ?Error];
|
||||
|
||||
fun compareLists(a: List, b: List) {
|
||||
len = count(a);
|
||||
if len != count(b):
|
||||
return false;
|
||||
i = 0;
|
||||
while i < len: {
|
||||
if a[i] != b[i]:
|
||||
return false;
|
||||
i = i+1;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
fun compareMaps(a: Map, b: Map) {
|
||||
keys = keysof(a);
|
||||
len = count(keys);
|
||||
if len != count(b):
|
||||
return false;
|
||||
i = 0;
|
||||
while i < len: {
|
||||
k = keys[i];
|
||||
if a[k] != b[k]:
|
||||
return false;
|
||||
i = i+1;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
fun compareAny(a, b) {
|
||||
Ta = type(a);
|
||||
Tb = type(b);
|
||||
|
||||
if Ta != Tb:
|
||||
return false;
|
||||
if Ta == List:
|
||||
return compareLists(a, b);
|
||||
if Ta == Map:
|
||||
return compareMaps(a, b);
|
||||
return a == b;
|
||||
}
|
||||
|
||||
fun runTestCase(test_case: TestCase) {
|
||||
res, err = json.parse(test_case[0]);
|
||||
return compareAny(res, test_case[1])
|
||||
and compareAny(err, test_case[2]);
|
||||
}
|
||||
|
||||
fun runAllTestCases(test_cases: List) {
|
||||
total = count(test_cases);
|
||||
passed = 0;
|
||||
evaluated = 0;
|
||||
while evaluated < total: {
|
||||
|
||||
test_case = test_cases[evaluated];
|
||||
input = test_case[0];
|
||||
expres = test_case[1]; # Expected result
|
||||
experr = test_case[2]; # Expected error
|
||||
|
||||
res, err = json.parse(input);
|
||||
|
||||
#print("res=", res, ", err=", err, "\n");
|
||||
#print("expres=", expres, ", experr=", experr, "\n");
|
||||
|
||||
result = compareAny(res, expres)
|
||||
and compareAny(err, experr);
|
||||
|
||||
if result: {
|
||||
print("Test ", evaluated, ": PASSED\n");
|
||||
passed = passed+1;
|
||||
} else {
|
||||
|
||||
print("Test ", evaluated, ": FAILED\n");
|
||||
print("\tInput:\n");
|
||||
print("\t\t", input, "\n");
|
||||
|
||||
if experr == none: {
|
||||
if err == none:
|
||||
print("\tGot result ", res, " but was expected ", expres, "\n");
|
||||
else
|
||||
print("\tFailed unexpectedly [", err, "]\n");
|
||||
} else if err == none:
|
||||
print("\tSucceded unexpectedly. Was expected error [", experr, "]\n");
|
||||
else
|
||||
print("\tWas expected error [", experr, "], but got [", err, "]\n");
|
||||
}
|
||||
evaluated = evaluated+1;
|
||||
}
|
||||
return passed, (total-passed), total;
|
||||
}
|
||||
|
||||
fun newPassingTestCase(src: String, res: JSONValueType)
|
||||
return [src, res, none];
|
||||
|
||||
fun newFailingTestCase(src: String, err: String)
|
||||
return [src, none, err];
|
||||
|
||||
test_cases = [
|
||||
newPassingTestCase("null", none),
|
||||
newPassingTestCase("true", true),
|
||||
newPassingTestCase("false", false),
|
||||
newPassingTestCase("\"Hello, world!\"", "Hello, world!"),
|
||||
newPassingTestCase("1", 1.0),
|
||||
newPassingTestCase("2.3", 2.3),
|
||||
newPassingTestCase("[]", []),
|
||||
newPassingTestCase("[1]", [1.0]),
|
||||
newPassingTestCase("[1, 2]", [1.0, 2.0]),
|
||||
newPassingTestCase("[1, 2, 3]", [1.0, 2.0, 3.0]),
|
||||
newPassingTestCase("{}", {}),
|
||||
newPassingTestCase("{\"k1\": true}", {k1: true}),
|
||||
newPassingTestCase("{\"k1\": true, \"k2\": false}", {k1: true, k2: false})
|
||||
];
|
||||
|
||||
passed, failed, total = runAllTestCases(test_cases);
|
||||
print("passed: ", passed, "\n");
|
||||
print("failed: ", failed, "\n");
|
||||
print(" total: ", total, "\n");
|
||||
@@ -0,0 +1,46 @@
|
||||
|
||||
Scanner = {src: String, i: int};
|
||||
|
||||
fun newScanner(src: String) {
|
||||
scan = {src: src, i: 0};
|
||||
assert(istypeof(Scanner, scan));
|
||||
return scan;
|
||||
}
|
||||
|
||||
fun isDigit(char: ?String) {
|
||||
if char == none:
|
||||
return false;
|
||||
return string.ord(char) >= string.ord('0')
|
||||
and string.ord(char) <= string.ord('9');
|
||||
}
|
||||
|
||||
fun isSpace(c: String)
|
||||
return c == ' '
|
||||
or c == '\t'
|
||||
or c == '\n';
|
||||
|
||||
fun min(x, y) {
|
||||
if x < y:
|
||||
return x;
|
||||
return y;
|
||||
}
|
||||
|
||||
fun hint(scan: Scanner, n: int = 1) {
|
||||
k = scan.i + n;
|
||||
if k < count(scan.src):
|
||||
return scan.src[k];
|
||||
return none;
|
||||
}
|
||||
|
||||
fun current(scan: Scanner)
|
||||
return hint(scan, 0);
|
||||
|
||||
fun consume(scan: Scanner, n: int = 1) {
|
||||
assert(n > 0);
|
||||
limit = count(scan.src);
|
||||
scan.i = min(scan.i + n, limit);
|
||||
}
|
||||
|
||||
fun consumeSpaces(scan: Scanner)
|
||||
while isSpace(current(scan)):
|
||||
consume(scan);
|
||||
@@ -931,7 +931,7 @@ static _Bool step(Runtime *runtime, Error *error)
|
||||
Object *callable = Stack_Top(runtime->stack, 0);
|
||||
ASSERT(callable != NULL);
|
||||
|
||||
Object *argv[8];
|
||||
Object *argv[32];
|
||||
|
||||
int max_argc = sizeof(argv) / sizeof(argv[0]);
|
||||
if(argc > max_argc)
|
||||
|
||||
Reference in New Issue
Block a user