feat: adds urlpattern to ada #381

miguelteixeiraa · 2023-05-09T20:39:51Z

TL;DR

WIP!

So i started to implement https://wicg.github.io/urlpattern/
Seems that this is an work-in-progress spec, so maybe we'll have some freestyle stuff along the way of the implementation.
I'm using https://github.com/kenchris/urlpattern-polyfill and https://github.com/denoland/rust-urlpattern as references.

Don't know if there is a "right way" to do this, but I get the unicode identifier start/part ranges using the script:

"use strict";

const fs = require("fs");

const regexIdentifierStart = /[$_\p{ID_Start}]/u;

function isValidIdStart(num) {
  const c = String.fromCharCode(num);
  return regexIdentifierStart.test(c);
}

const validRanges = [];
let start = null;

for (let c = 256; c < 0x10ffff; c++) {
  const isValid = isValidIdStart(c);
  if (isValid && start === null) {
    start = c;
  } else if (!isValid && start !== null) {
    validRanges.push([start, c - 1]);
    start = null;
  }
}

const writeRangeInFile = (filename, ranges) => {
  let file = "";
  for (const [base, upper] of ranges) {
    file += `\{${base}, ${upper}\},\n`;
  }
  fs.writeFile(filename, file, (err) => {});
};

console.log(validRanges.length);

writeRangeInFile("id_start_ranges.txt", validRanges);

++ something similar for the identifier-part with the regex /[$_\u200C\u200D\p{ID_Continue}]/u
I got those regexes in https://github.com/kenchris/urlpattern-polyfill/blob/main/src/path-to-regex-modified.ts#LL70C1-L70C50

Then I used the ranges to create bitwise masks in the unicode.cpp.

Nothing is tested yet

It will took some time to finish!

ref nodejs/node#40844

anonrig · 2023-05-09T21:07:58Z

include/ada/urlpattern.h

+  bool ignore_case = false;
+};
+
+struct component_result {


ada::component_result seems a really vague naming, since it might be mistaken with ada::url_components

include/ada/urlpattern.h

src/urlpattern.cpp

include/ada/unicode.h

anonrig · 2023-06-10T14:18:38Z

include/ada/urlpattern.h

+namespace ada::urlpattern {
+struct urlpattern_component_result {
+  std::string_view input;
+  std::unordered_map<std::string_view, std::optional<std::string_view>> groups;


@lemire How's the performance comparison of using std::optional in here versus std::variant<std::nullopt, std::string_view>?

I don't expect it matters much.

anonrig · 2023-06-10T14:19:41Z

include/ada/urlpattern_base.h

+namespace ada::urlpattern {
+
+struct urlpattern_options {
+  std::string_view delimiter = "";


Suggested change

std::string_view delimiter = "";

std::string_view delimiter{};

anonrig · 2023-06-10T14:20:18Z

include/ada/urlpattern_constructor_string_parser.h

+
+  std::u32string_view input;
+  std::vector<token> token_list;
+  size_t component_start = 0;


Suggested change

size_t component_start = 0;

size_t component_start{0};

anonrig · 2023-06-10T14:22:03Z

include/ada/urlpattern_internals.h

+
+namespace ada::urlpattern {
+// https://wicg.github.io/urlpattern/#component
+struct urlpattern_component {


Since this is already under ada::urlpattern namespace, why not call this struct component?

anonrig · 2023-06-10T14:23:57Z

src/urlpattern_canonicalization.cpp

+  std::string final_utf8_url(utf8_size, '\0');
+  ada::idna::utf32_to_utf8(url.data(), url.size(), final_utf8_url.data());
+
+  if (ada::can_parse(final_utf8_url)) {


Can you add a todo in here to optimize the can_parse function?

anonrig · 2023-06-10T14:30:05Z

src/urlpattern_constructor_string_parser.cpp

+ada_really_inline bool constructor_string_parser::is_group_open() {
+  // If parser’s token list[parser’s token index]'s type is "open", then
+  // return true. Else return false.
+  return token_list[token_index].type == TOKEN_TYPE::OPEN;


This is not safe. We should add development asserts to make sure token_index is smaller than token_list length.

anonrig · 2023-06-10T14:31:29Z

src/urlpattern_pattern_parser.cpp

+  while (index < input.size()) {
+    size_t pos = input.find_first_of(U".+*?^${}()[]|/\\)");
+    if (pos == std::string_view::npos) {
+      result = result += input.substr(index, input.size());


This line is weird.

anonrig · 2023-06-10T14:34:24Z

src/urlpattern_pattern_parser.cpp

+    // 1. Set type to "full-wildcard".
+    type = PART_TYPE::FULL_WILDCARD;
+    // 2. Set regexp value to the empty string.
+    regexp_value.clear();


We are assigning and later clearing this value, which is creating performance degregation. We should eventually optimize it to reduce unnecessary allocations.

anonrig · 2023-06-10T14:35:43Z

src/urlpattern_pattern_parser.cpp

+  }
+
+  // 3. Set token to the result of running try to consume a token given parser
+  // and "asterisk".


there was a function like t.value_or("default val")

anonrig · 2023-06-10T14:36:32Z

src/urlpattern_pattern_parser.cpp

+
+  // If name token is null and token is null, then set token to the result of
+  // running try to consume a token given parser and "asterisk".
+  if (!name_token.has_value() && !regexp_or_wildcard.has_value()) {


There is fast path here. If name_token does not have a value, you dont need to try to consume token right?

bricss · 2023-12-05T19:40:13Z

Is there any way to crank 🔧 this up for nodejs/node#51060 needs? 🤔

bricss · 2024-01-15T22:45:42Z

Houston, do you read me? 📡

lemire · 2024-01-15T22:53:13Z

@bricss Are you available to help push this forward?

bricss · 2024-01-15T23:00:52Z

Yes, with only one exception, I don't have big/deep experience with C++ coding 🤷‍♂️ atm 🙄

lemire · 2024-01-15T23:21:52Z

@bricss Lack of knowledge of C++ could be a problem.

miguelteixeiraa added 4 commits May 8, 2023 13:41

urlpattern: adds id_start and id_pard lookup table

e466165

urlpattern: adds id_start & id_part + tokenizer sketch

4aa5f55

urlpattern: adds missing eof

842f5b1

merge branch 'main' into urlpattern

dadb665

miguelteixeiraa marked this pull request as draft May 9, 2023 20:41

urlpattern: adds bitset lib

ee41c6f

anonrig reviewed May 9, 2023

View reviewed changes

anonrig mentioned this pull request May 9, 2023

implement URLPattern nodejs/node#40844

Open

miguelteixeiraa added 20 commits May 10, 2023 08:47

urlpattern: adds comments to unicode.h

df58be4

urlpattern: component_result -> urlpattern_component_result

582a649

urlpattern: wip constructors

0516de4

urlpattern: WIP contructor_string_parser

179a065

urlpattern: introducing canonicalize_protocol

2e80ab3

urlpatter: adds pragma regions

17ee73d

urlpattern: breakdown in multiple files

9ae30c4

urlpattern: minor fixes

95e5c70

urlpattern: fixup to make it compile

b9041fb

Merge branch 'main' into urlpattern

50d6d09

urlpattern: adds missing cassert lib + fixes

5651a1f

urlpattern: fix assert for token type

ca49555

urlpattern: introducing tests for tokenizer

58342b3

urlpattern: update id_start and id_part tables

3f5fac8

urlpattern: WIP fix tokenizer

824725d

urlpattern: update tokenizer

88453a5

urlpattern: updates tokenizer's test

6e14684

urlpattern: make tokenizer pass the tests

81fa16d

urlpattern: WIP compile a component

5016786

urlpattern: WIP pattern parser

8c8942a

anonrig reviewed Jun 10, 2023

View reviewed changes

Merge branch 'main' into urlpattern

aa8522f

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feat: adds urlpattern to ada #381

feat: adds urlpattern to ada #381

miguelteixeiraa commented May 9, 2023 •

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bricss commented Dec 5, 2023

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lemire commented Jan 15, 2024

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lemire commented Jan 15, 2024

	std::string_view delimiter = "";
	std::string_view delimiter{};

feat: adds urlpattern to ada #381

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feat: adds urlpattern to ada #381

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bricss commented Dec 5, 2023

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miguelteixeiraa commented May 9, 2023 •

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