first commit

1 files changed, 99 insertions, 0 deletions

diff --git a/node_modules/tar/dist/commonjs/large-numbers.js b/node_modules/tar/dist/commonjs/large-numbers.js
new file mode 100644
index 0000000..5b07aa7
--- /dev/null
+++ b/node_modules/tar/dist/commonjs/large-numbers.js
@@ -0,0 +1,99 @@
+"use strict";
+// Tar can encode large and negative numbers using a leading byte of
+// 0xff for negative, and 0x80 for positive.
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.parse = exports.encode = void 0;
+const encode = (num, buf) => {
+    if (!Number.isSafeInteger(num)) {
+        // The number is so large that javascript cannot represent it with integer
+        // precision.
+        throw Error('cannot encode number outside of javascript safe integer range');
+    }
+    else if (num < 0) {
+        encodeNegative(num, buf);
+    }
+    else {
+        encodePositive(num, buf);
+    }
+    return buf;
+};
+exports.encode = encode;
+const encodePositive = (num, buf) => {
+    buf[0] = 0x80;
+    for (var i = buf.length; i > 1; i--) {
+        buf[i - 1] = num & 0xff;
+        num = Math.floor(num / 0x100);
+    }
+};
+const encodeNegative = (num, buf) => {
+    buf[0] = 0xff;
+    var flipped = false;
+    num = num * -1;
+    for (var i = buf.length; i > 1; i--) {
+        var byte = num & 0xff;
+        num = Math.floor(num / 0x100);
+        if (flipped) {
+            buf[i - 1] = onesComp(byte);
+        }
+        else if (byte === 0) {
+            buf[i - 1] = 0;
+        }
+        else {
+            flipped = true;
+            buf[i - 1] = twosComp(byte);
+        }
+    }
+};
+const parse = (buf) => {
+    const pre = buf[0];
+    const value = pre === 0x80 ? pos(buf.subarray(1, buf.length))
+        : pre === 0xff ? twos(buf)
+            : null;
+    if (value === null) {
+        throw Error('invalid base256 encoding');
+    }
+    if (!Number.isSafeInteger(value)) {
+        // The number is so large that javascript cannot represent it with integer
+        // precision.
+        throw Error('parsed number outside of javascript safe integer range');
+    }
+    return value;
+};
+exports.parse = parse;
+const twos = (buf) => {
+    var len = buf.length;
+    var sum = 0;
+    var flipped = false;
+    for (var i = len - 1; i > -1; i--) {
+        var byte = Number(buf[i]);
+        var f;
+        if (flipped) {
+            f = onesComp(byte);
+        }
+        else if (byte === 0) {
+            f = byte;
+        }
+        else {
+            flipped = true;
+            f = twosComp(byte);
+        }
+        if (f !== 0) {
+            sum -= f * Math.pow(256, len - i - 1);
+        }
+    }
+    return sum;
+};
+const pos = (buf) => {
+    var len = buf.length;
+    var sum = 0;
+    for (var i = len - 1; i > -1; i--) {
+        var byte = Number(buf[i]);
+        if (byte !== 0) {
+            sum += byte * Math.pow(256, len - i - 1);
+        }
+    }
+    return sum;
+};
+const onesComp = (byte) => (0xff ^ byte) & 0xff;
+const twosComp = (byte) => ((0xff ^ byte) + 1) & 0xff;
+//# sourceMappingURL=large-numbers.js.map
\ No newline at end of file