64 lines
2 KiB
JavaScript
64 lines
2 KiB
JavaScript
/*---------------------------------------------------------------------------------------------
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* Copyright (c) Microsoft Corporation. All rights reserved.
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* Licensed under the MIT License. See License.txt in the project root for license information.
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*--------------------------------------------------------------------------------------------*/
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/**
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* @returns the directory name of a path.
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*/
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export function dirname(path) {
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const idx = ~path.lastIndexOf('/') || ~path.lastIndexOf('\\');
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if (idx === 0) {
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return '.';
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}
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else if (~idx === 0) {
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return path[0];
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}
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else {
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return path.substring(0, ~idx);
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}
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}
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/**
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* @returns the base name of a path.
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*/
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export function basename(path) {
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const idx = ~path.lastIndexOf('/') || ~path.lastIndexOf('\\');
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if (idx === 0) {
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return path;
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}
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else if (~idx === path.length - 1) {
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return basename(path.substring(0, path.length - 1));
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}
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else {
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return path.substr(~idx + 1);
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}
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}
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/**
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* @returns {{.far}} from boo.far or the empty string.
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*/
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export function extname(path) {
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path = basename(path);
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const idx = ~path.lastIndexOf('.');
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return idx ? path.substring(~idx) : '';
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}
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export const join = function () {
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// Not using a function with var-args because of how TS compiles
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// them to JS - it would result in 2*n runtime cost instead
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// of 1*n, where n is parts.length.
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let value = '';
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for (let i = 0; i < arguments.length; i++) {
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const part = arguments[i];
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if (i > 0) {
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// add the separater between two parts unless
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// there already is one
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const last = value.charCodeAt(value.length - 1);
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if (last !== 47 /* CharCode.Slash */ && last !== 92 /* CharCode.Backslash */) {
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const next = part.charCodeAt(0);
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if (next !== 47 /* CharCode.Slash */ && next !== 92 /* CharCode.Backslash */) {
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value += '/';
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}
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}
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}
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value += part;
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}
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return value;
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};
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