Function normalize

src/platform/vscode-path/path.ts:345–431

(path: string)

    },

    normalize(path: string): string {
        validateString(path, 'path');
        const len = path.length;
        if (len === 0) {
            return '.';
        }
        let rootEnd = 0;
        let device;
        let isAbsolute = false;
        const code = path.charCodeAt(0);

        // Try to match a root
        if (len === 1) {
            // `path` contains just a single char, exit early to avoid
            // unnecessary work
            return isPosixPathSeparator(code) ? '\\' : path;
        }
        if (isPathSeparator(code)) {
            // Possible UNC root

            // If we started with a separator, we know we at least have an absolute
            // path of some kind (UNC or otherwise)
            isAbsolute = true;

            if (isPathSeparator(path.charCodeAt(1))) {
                // Matched double path separator at beginning
                let j = 2;
                let last = j;
                // Match 1 or more non-path separators
                while (j < len && !isPathSeparator(path.charCodeAt(j))) {
                    j++;
                }
                if (j < len && j !== last) {
                    const firstPart = path.slice(last, j);
                    // Matched!
                    last = j;
                    // Match 1 or more path separators
                    while (j < len && isPathSeparator(path.charCodeAt(j))) {
                        j++;
                    }
                    if (j < len && j !== last) {
                        // Matched!
                        last = j;
                        // Match 1 or more non-path separators
                        while (j < len && !isPathSeparator(path.charCodeAt(j))) {
                            j++;
                        }
                        if (j === len) {
                            // We matched a UNC root only
                            // Return the normalized version of the UNC root since there
                            // is nothing left to process
                            return `\\\\${firstPart}\\${path.slice(last)}\\`;
                        }
                        if (j !== last) {
                            // We matched a UNC root with leftovers
                            device = `\\\\${firstPart}\\${path.slice(last, j)}`;
                            rootEnd = j;
                        }