@jspm/core
Version:
This package contains the core libraries used in jspm 2.
361 lines (338 loc) • 11.1 kB
JavaScript
import { d as dew$2 } from './chunk-DtuTasat.js';
var exports$2 = {},
_dewExec$1 = false;
function dew$1() {
if (_dewExec$1) return exports$2;
_dewExec$1 = true;
/*! safe-buffer. MIT License. Feross Aboukhadijeh <https://feross.org/opensource> */
/* eslint-disable node/no-deprecated-api */
var buffer = dew$2();
var Buffer = buffer.Buffer;
// alternative to using Object.keys for old browsers
function copyProps(src, dst) {
for (var key in src) {
dst[key] = src[key];
}
}
if (Buffer.from && Buffer.alloc && Buffer.allocUnsafe && Buffer.allocUnsafeSlow) {
exports$2 = buffer;
} else {
// Copy properties from require('buffer')
copyProps(buffer, exports$2);
exports$2.Buffer = SafeBuffer;
}
function SafeBuffer(arg, encodingOrOffset, length) {
return Buffer(arg, encodingOrOffset, length);
}
SafeBuffer.prototype = Object.create(Buffer.prototype);
// Copy static methods from Buffer
copyProps(Buffer, SafeBuffer);
SafeBuffer.from = function (arg, encodingOrOffset, length) {
if (typeof arg === "number") {
throw new TypeError("Argument must not be a number");
}
return Buffer(arg, encodingOrOffset, length);
};
SafeBuffer.alloc = function (size, fill, encoding) {
if (typeof size !== "number") {
throw new TypeError("Argument must be a number");
}
var buf = Buffer(size);
if (fill !== undefined) {
if (typeof encoding === "string") {
buf.fill(fill, encoding);
} else {
buf.fill(fill);
}
} else {
buf.fill(0);
}
return buf;
};
SafeBuffer.allocUnsafe = function (size) {
if (typeof size !== "number") {
throw new TypeError("Argument must be a number");
}
return Buffer(size);
};
SafeBuffer.allocUnsafeSlow = function (size) {
if (typeof size !== "number") {
throw new TypeError("Argument must be a number");
}
return buffer.SlowBuffer(size);
};
return exports$2;
}
var exports$1 = {},
_dewExec = false;
function dew() {
if (_dewExec) return exports$1;
_dewExec = true;
/*<replacement>*/
var Buffer = dew$1().Buffer;
/*</replacement>*/
var isEncoding = Buffer.isEncoding || function (encoding) {
encoding = "" + encoding;
switch (encoding && encoding.toLowerCase()) {
case "hex":
case "utf8":
case "utf-8":
case "ascii":
case "binary":
case "base64":
case "ucs2":
case "ucs-2":
case "utf16le":
case "utf-16le":
case "raw":
return true;
default:
return false;
}
};
function _normalizeEncoding(enc) {
if (!enc) return "utf8";
var retried;
while (true) {
switch (enc) {
case "utf8":
case "utf-8":
return "utf8";
case "ucs2":
case "ucs-2":
case "utf16le":
case "utf-16le":
return "utf16le";
case "latin1":
case "binary":
return "latin1";
case "base64":
case "ascii":
case "hex":
return enc;
default:
if (retried) return; // undefined
enc = ("" + enc).toLowerCase();
retried = true;
}
}
}
// Do not cache `Buffer.isEncoding` when checking encoding names as some
// modules monkey-patch it to support additional encodings
function normalizeEncoding(enc) {
var nenc = _normalizeEncoding(enc);
if (typeof nenc !== "string" && (Buffer.isEncoding === isEncoding || !isEncoding(enc))) throw new Error("Unknown encoding: " + enc);
return nenc || enc;
}
// StringDecoder provides an interface for efficiently splitting a series of
// buffers into a series of JS strings without breaking apart multi-byte
// characters.
exports$1.StringDecoder = StringDecoder;
function StringDecoder(encoding) {
this.encoding = normalizeEncoding(encoding);
var nb;
switch (this.encoding) {
case "utf16le":
this.text = utf16Text;
this.end = utf16End;
nb = 4;
break;
case "utf8":
this.fillLast = utf8FillLast;
nb = 4;
break;
case "base64":
this.text = base64Text;
this.end = base64End;
nb = 3;
break;
default:
this.write = simpleWrite;
this.end = simpleEnd;
return;
}
this.lastNeed = 0;
this.lastTotal = 0;
this.lastChar = Buffer.allocUnsafe(nb);
}
StringDecoder.prototype.write = function (buf) {
if (buf.length === 0) return "";
var r;
var i;
if (this.lastNeed) {
r = this.fillLast(buf);
if (r === undefined) return "";
i = this.lastNeed;
this.lastNeed = 0;
} else {
i = 0;
}
if (i < buf.length) return r ? r + this.text(buf, i) : this.text(buf, i);
return r || "";
};
StringDecoder.prototype.end = utf8End;
// Returns only complete characters in a Buffer
StringDecoder.prototype.text = utf8Text;
// Attempts to complete a partial non-UTF-8 character using bytes from a Buffer
StringDecoder.prototype.fillLast = function (buf) {
if (this.lastNeed <= buf.length) {
buf.copy(this.lastChar, this.lastTotal - this.lastNeed, 0, this.lastNeed);
return this.lastChar.toString(this.encoding, 0, this.lastTotal);
}
buf.copy(this.lastChar, this.lastTotal - this.lastNeed, 0, buf.length);
this.lastNeed -= buf.length;
};
// Checks the type of a UTF-8 byte, whether it's ASCII, a leading byte, or a
// continuation byte. If an invalid byte is detected, -2 is returned.
function utf8CheckByte(byte) {
if (byte <= 127) return 0;else if (byte >> 5 === 6) return 2;else if (byte >> 4 === 14) return 3;else if (byte >> 3 === 30) return 4;
return byte >> 6 === 2 ? -1 : -2;
}
// Checks at most 3 bytes at the end of a Buffer in order to detect an
// incomplete multi-byte UTF-8 character. The total number of bytes (2, 3, or 4)
// needed to complete the UTF-8 character (if applicable) are returned.
function utf8CheckIncomplete(self, buf, i) {
var j = buf.length - 1;
if (j < i) return 0;
var nb = utf8CheckByte(buf[j]);
if (nb >= 0) {
if (nb > 0) self.lastNeed = nb - 1;
return nb;
}
if (--j < i || nb === -2) return 0;
nb = utf8CheckByte(buf[j]);
if (nb >= 0) {
if (nb > 0) self.lastNeed = nb - 2;
return nb;
}
if (--j < i || nb === -2) return 0;
nb = utf8CheckByte(buf[j]);
if (nb >= 0) {
if (nb > 0) {
if (nb === 2) nb = 0;else self.lastNeed = nb - 3;
}
return nb;
}
return 0;
}
// Validates as many continuation bytes for a multi-byte UTF-8 character as
// needed or are available. If we see a non-continuation byte where we expect
// one, we "replace" the validated continuation bytes we've seen so far with
// a single UTF-8 replacement character ('\ufffd'), to match v8's UTF-8 decoding
// behavior. The continuation byte check is included three times in the case
// where all of the continuation bytes for a character exist in the same buffer.
// It is also done this way as a slight performance increase instead of using a
// loop.
function utf8CheckExtraBytes(self, buf, p) {
if ((buf[0] & 192) !== 128) {
self.lastNeed = 0;
return "\uFFFD";
}
if (self.lastNeed > 1 && buf.length > 1) {
if ((buf[1] & 192) !== 128) {
self.lastNeed = 1;
return "\uFFFD";
}
if (self.lastNeed > 2 && buf.length > 2) {
if ((buf[2] & 192) !== 128) {
self.lastNeed = 2;
return "\uFFFD";
}
}
}
}
// Attempts to complete a multi-byte UTF-8 character using bytes from a Buffer.
function utf8FillLast(buf) {
var p = this.lastTotal - this.lastNeed;
var r = utf8CheckExtraBytes(this, buf);
if (r !== undefined) return r;
if (this.lastNeed <= buf.length) {
buf.copy(this.lastChar, p, 0, this.lastNeed);
return this.lastChar.toString(this.encoding, 0, this.lastTotal);
}
buf.copy(this.lastChar, p, 0, buf.length);
this.lastNeed -= buf.length;
}
// Returns all complete UTF-8 characters in a Buffer. If the Buffer ended on a
// partial character, the character's bytes are buffered until the required
// number of bytes are available.
function utf8Text(buf, i) {
var total = utf8CheckIncomplete(this, buf, i);
if (!this.lastNeed) return buf.toString("utf8", i);
this.lastTotal = total;
var end = buf.length - (total - this.lastNeed);
buf.copy(this.lastChar, 0, end);
return buf.toString("utf8", i, end);
}
// For UTF-8, a replacement character is added when ending on a partial
// character.
function utf8End(buf) {
var r = buf && buf.length ? this.write(buf) : "";
if (this.lastNeed) return r + "\uFFFD";
return r;
}
// UTF-16LE typically needs two bytes per character, but even if we have an even
// number of bytes available, we need to check if we end on a leading/high
// surrogate. In that case, we need to wait for the next two bytes in order to
// decode the last character properly.
function utf16Text(buf, i) {
if ((buf.length - i) % 2 === 0) {
var r = buf.toString("utf16le", i);
if (r) {
var c = r.charCodeAt(r.length - 1);
if (c >= 55296 && c <= 56319) {
this.lastNeed = 2;
this.lastTotal = 4;
this.lastChar[0] = buf[buf.length - 2];
this.lastChar[1] = buf[buf.length - 1];
return r.slice(0, -1);
}
}
return r;
}
this.lastNeed = 1;
this.lastTotal = 2;
this.lastChar[0] = buf[buf.length - 1];
return buf.toString("utf16le", i, buf.length - 1);
}
// For UTF-16LE we do not explicitly append special replacement characters if we
// end on a partial character, we simply let v8 handle that.
function utf16End(buf) {
var r = buf && buf.length ? this.write(buf) : "";
if (this.lastNeed) {
var end = this.lastTotal - this.lastNeed;
return r + this.lastChar.toString("utf16le", 0, end);
}
return r;
}
function base64Text(buf, i) {
var n = (buf.length - i) % 3;
if (n === 0) return buf.toString("base64", i);
this.lastNeed = 3 - n;
this.lastTotal = 3;
if (n === 1) {
this.lastChar[0] = buf[buf.length - 1];
} else {
this.lastChar[0] = buf[buf.length - 2];
this.lastChar[1] = buf[buf.length - 1];
}
return buf.toString("base64", i, buf.length - n);
}
function base64End(buf) {
var r = buf && buf.length ? this.write(buf) : "";
if (this.lastNeed) return r + this.lastChar.toString("base64", 0, 3 - this.lastNeed);
return r;
}
// Pass bytes on through for single-byte encodings (e.g. ascii, latin1, hex)
function simpleWrite(buf) {
return buf.toString(this.encoding);
}
function simpleEnd(buf) {
return buf && buf.length ? this.write(buf) : "";
}
return exports$1;
}
const exports = dew();
exports['StringDecoder'];
var StringDecoder = exports.StringDecoder;
export { StringDecoder as S, dew$1 as d, exports as e };