-
Notifications
You must be signed in to change notification settings - Fork 576
/
_util.ts
130 lines (120 loc) · 3.61 KB
/
_util.ts
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
// Copyright the Browserify authors. MIT License.
// Ported from https://github.com/browserify/path-browserify/
import type { FormatInputPathObject } from "./_interface.ts";
import {
CHAR_BACKWARD_SLASH,
CHAR_DOT,
CHAR_FORWARD_SLASH,
CHAR_LOWERCASE_A,
CHAR_LOWERCASE_Z,
CHAR_UPPERCASE_A,
CHAR_UPPERCASE_Z,
} from "./_constants.ts";
import { ERR_INVALID_ARG_TYPE } from "../internal/errors.ts";
export function assertPath(path: string): void {
if (typeof path !== "string") {
throw new ERR_INVALID_ARG_TYPE("path", ["string"], path);
}
}
export function isPosixPathSeparator(code: number): boolean {
return code === CHAR_FORWARD_SLASH;
}
export function isPathSeparator(code: number): boolean {
return isPosixPathSeparator(code) || code === CHAR_BACKWARD_SLASH;
}
export function isWindowsDeviceRoot(code: number): boolean {
return (
(code >= CHAR_LOWERCASE_A && code <= CHAR_LOWERCASE_Z) ||
(code >= CHAR_UPPERCASE_A && code <= CHAR_UPPERCASE_Z)
);
}
// Resolves . and .. elements in a path with directory names
export function normalizeString(
path: string,
allowAboveRoot: boolean,
separator: string,
isPathSeparator: (code: number) => boolean,
): string {
let res = "";
let lastSegmentLength = 0;
let lastSlash = -1;
let dots = 0;
let code: number | undefined;
for (let i = 0, len = path.length; i <= len; ++i) {
if (i < len) code = path.charCodeAt(i);
else if (isPathSeparator(code!)) break;
else code = CHAR_FORWARD_SLASH;
if (isPathSeparator(code!)) {
if (lastSlash === i - 1 || dots === 1) {
// NOOP
} else if (lastSlash !== i - 1 && dots === 2) {
if (
res.length < 2 ||
lastSegmentLength !== 2 ||
res.charCodeAt(res.length - 1) !== CHAR_DOT ||
res.charCodeAt(res.length - 2) !== CHAR_DOT
) {
if (res.length > 2) {
const lastSlashIndex = res.lastIndexOf(separator);
if (lastSlashIndex === -1) {
res = "";
lastSegmentLength = 0;
} else {
res = res.slice(0, lastSlashIndex);
lastSegmentLength = res.length - 1 - res.lastIndexOf(separator);
}
lastSlash = i;
dots = 0;
continue;
} else if (res.length === 2 || res.length === 1) {
res = "";
lastSegmentLength = 0;
lastSlash = i;
dots = 0;
continue;
}
}
if (allowAboveRoot) {
if (res.length > 0) res += `${separator}..`;
else res = "..";
lastSegmentLength = 2;
}
} else {
if (res.length > 0) res += separator + path.slice(lastSlash + 1, i);
else res = path.slice(lastSlash + 1, i);
lastSegmentLength = i - lastSlash - 1;
}
lastSlash = i;
dots = 0;
} else if (code === CHAR_DOT && dots !== -1) {
++dots;
} else {
dots = -1;
}
}
return res;
}
export function _format(
sep: string,
pathObject: FormatInputPathObject,
): string {
const dir: string | undefined = pathObject.dir || pathObject.root;
const base: string = pathObject.base ||
(pathObject.name || "") + (pathObject.ext || "");
if (!dir) return base;
if (dir === pathObject.root) return dir + base;
return dir + sep + base;
}
const WHITESPACE_ENCODINGS: Record<string, string> = {
"\u0009": "%09",
"\u000A": "%0A",
"\u000B": "%0B",
"\u000C": "%0C",
"\u000D": "%0D",
"\u0020": "%20",
};
export function encodeWhitespace(string: string): string {
return string.replaceAll(/[\s]/g, (c) => {
return WHITESPACE_ENCODINGS[c] ?? c;
});
}