Clean up dependencies
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2026-02-16 15:12:59 -05:00
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commit 2f15523a55
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MIT License
Copyright (c) 2017 Emmet.io
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

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'use strict';
/**
* A streaming, character code-based string reader
*/
class StreamReader {
constructor(string, start, end) {
if (end == null && typeof string === 'string') {
end = string.length;
}
this.string = string;
this.pos = this.start = start || 0;
this.end = end;
}
/**
* Returns true only if the stream is at the end of the file.
* @returns {Boolean}
*/
eof() {
return this.pos >= this.end;
}
/**
* Creates a new stream instance which is limited to given `start` and `end`
* range. E.g. its `eof()` method will look at `end` property, not actual
* stream end
* @param {Point} start
* @param {Point} end
* @return {StreamReader}
*/
limit(start, end) {
return new this.constructor(this.string, start, end);
}
/**
* Returns the next character code in the stream without advancing it.
* Will return NaN at the end of the file.
* @returns {Number}
*/
peek() {
return this.string.charCodeAt(this.pos);
}
/**
* Returns the next character in the stream and advances it.
* Also returns <code>undefined</code> when no more characters are available.
* @returns {Number}
*/
next() {
if (this.pos < this.string.length) {
return this.string.charCodeAt(this.pos++);
}
}
/**
* `match` can be a character code or a function that takes a character code
* and returns a boolean. If the next character in the stream 'matches'
* the given argument, it is consumed and returned.
* Otherwise, `false` is returned.
* @param {Number|Function} match
* @returns {Boolean}
*/
eat(match) {
const ch = this.peek();
const ok = typeof match === 'function' ? match(ch) : ch === match;
if (ok) {
this.next();
}
return ok;
}
/**
* Repeatedly calls <code>eat</code> with the given argument, until it
* fails. Returns <code>true</code> if any characters were eaten.
* @param {Object} match
* @returns {Boolean}
*/
eatWhile(match) {
const start = this.pos;
while (!this.eof() && this.eat(match)) {}
return this.pos !== start;
}
/**
* Backs up the stream n characters. Backing it up further than the
* start of the current token will cause things to break, so be careful.
* @param {Number} n
*/
backUp(n) {
this.pos -= (n || 1);
}
/**
* Get the string between the start of the current token and the
* current stream position.
* @returns {String}
*/
current() {
return this.substring(this.start, this.pos);
}
/**
* Returns substring for given range
* @param {Number} start
* @param {Number} [end]
* @return {String}
*/
substring(start, end) {
return this.string.slice(start, end);
}
/**
* Creates error object with current stream state
* @param {String} message
* @return {Error}
*/
error(message) {
const err = new Error(`${message} at char ${this.pos + 1}`);
err.originalMessage = message;
err.pos = this.pos;
err.string = this.string;
return err;
}
}
module.exports = StreamReader;

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/**
* A streaming, character code-based string reader
*/
class StreamReader {
constructor(string, start, end) {
if (end == null && typeof string === 'string') {
end = string.length;
}
this.string = string;
this.pos = this.start = start || 0;
this.end = end;
}
/**
* Returns true only if the stream is at the end of the file.
* @returns {Boolean}
*/
eof() {
return this.pos >= this.end;
}
/**
* Creates a new stream instance which is limited to given `start` and `end`
* range. E.g. its `eof()` method will look at `end` property, not actual
* stream end
* @param {Point} start
* @param {Point} end
* @return {StreamReader}
*/
limit(start, end) {
return new this.constructor(this.string, start, end);
}
/**
* Returns the next character code in the stream without advancing it.
* Will return NaN at the end of the file.
* @returns {Number}
*/
peek() {
return this.string.charCodeAt(this.pos);
}
/**
* Returns the next character in the stream and advances it.
* Also returns <code>undefined</code> when no more characters are available.
* @returns {Number}
*/
next() {
if (this.pos < this.string.length) {
return this.string.charCodeAt(this.pos++);
}
}
/**
* `match` can be a character code or a function that takes a character code
* and returns a boolean. If the next character in the stream 'matches'
* the given argument, it is consumed and returned.
* Otherwise, `false` is returned.
* @param {Number|Function} match
* @returns {Boolean}
*/
eat(match) {
const ch = this.peek();
const ok = typeof match === 'function' ? match(ch) : ch === match;
if (ok) {
this.next();
}
return ok;
}
/**
* Repeatedly calls <code>eat</code> with the given argument, until it
* fails. Returns <code>true</code> if any characters were eaten.
* @param {Object} match
* @returns {Boolean}
*/
eatWhile(match) {
const start = this.pos;
while (!this.eof() && this.eat(match)) {}
return this.pos !== start;
}
/**
* Backs up the stream n characters. Backing it up further than the
* start of the current token will cause things to break, so be careful.
* @param {Number} n
*/
backUp(n) {
this.pos -= (n || 1);
}
/**
* Get the string between the start of the current token and the
* current stream position.
* @returns {String}
*/
current() {
return this.substring(this.start, this.pos);
}
/**
* Returns substring for given range
* @param {Number} start
* @param {Number} [end]
* @return {String}
*/
substring(start, end) {
return this.string.slice(start, end);
}
/**
* Creates error object with current stream state
* @param {String} message
* @return {Error}
*/
error(message) {
const err = new Error(`${message} at char ${this.pos + 1}`);
err.originalMessage = message;
err.pos = this.pos;
err.string = this.string;
return err;
}
}
export default StreamReader;

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{
"name": "@emmetio/stream-reader",
"version": "2.2.0",
"description": "Reads text as stream",
"main": "dist/stream-reader.cjs.js",
"module": "dist/stream-reader.es.js",
"scripts": {
"test": "mocha",
"build": "rollup -c",
"prepublish": "npm run test && npm run build"
},
"repository": {
"type": "git",
"url": "git+https://github.com/emmetio/stream-reader.git"
},
"keywords": [
"emmet",
"stream",
"reader"
],
"author": "Sergey Chikuyonok <serge.che@gmail.com>",
"license": "MIT",
"bugs": {
"url": "https://github.com/emmetio/stream-reader/issues"
},
"homepage": "https://github.com/emmetio/stream-reader#readme",
"devDependencies": {
"babel-plugin-transform-es2015-modules-commonjs": "^6.18.0",
"babel-register": "^6.18.0",
"mocha": "^3.2.0",
"rollup": "^0.41.1"
}
}