Firebase Update

express-server/node_modules/@protobufjs/base64/index.js

@@ -0,0 +1,139 @@
+"use strict";
+
+/**
+ * A minimal base64 implementation for number arrays.
+ * @memberof util
+ * @namespace
+ */
+var base64 = exports;
+
+/**
+ * Calculates the byte length of a base64 encoded string.
+ * @param {string} string Base64 encoded string
+ * @returns {number} Byte length
+ */
+base64.length = function length(string) {
+    var p = string.length;
+    if (!p)
+        return 0;
+    var n = 0;
+    while (--p % 4 > 1 && string.charAt(p) === "=")
+        ++n;
+    return Math.ceil(string.length * 3) / 4 - n;
+};
+
+// Base64 encoding table
+var b64 = new Array(64);
+
+// Base64 decoding table
+var s64 = new Array(123);
+
+// 65..90, 97..122, 48..57, 43, 47
+for (var i = 0; i < 64;)
+    s64[b64[i] = i < 26 ? i + 65 : i < 52 ? i + 71 : i < 62 ? i - 4 : i - 59 | 43] = i++;
+
+/**
+ * Encodes a buffer to a base64 encoded string.
+ * @param {Uint8Array} buffer Source buffer
+ * @param {number} start Source start
+ * @param {number} end Source end
+ * @returns {string} Base64 encoded string
+ */
+base64.encode = function encode(buffer, start, end) {
+    var parts = null,
+        chunk = [];
+    var i = 0, // output index
+        j = 0, // goto index
+        t;     // temporary
+    while (start < end) {
+        var b = buffer[start++];
+        switch (j) {
+            case 0:
+                chunk[i++] = b64[b >> 2];
+                t = (b & 3) << 4;
+                j = 1;
+                break;
+            case 1:
+                chunk[i++] = b64[t | b >> 4];
+                t = (b & 15) << 2;
+                j = 2;
+                break;
+            case 2:
+                chunk[i++] = b64[t | b >> 6];
+                chunk[i++] = b64[b & 63];
+                j = 0;
+                break;
+        }
+        if (i > 8191) {
+            (parts || (parts = [])).push(String.fromCharCode.apply(String, chunk));
+            i = 0;
+        }
+    }
+    if (j) {
+        chunk[i++] = b64[t];
+        chunk[i++] = 61;
+        if (j === 1)
+            chunk[i++] = 61;
+    }
+    if (parts) {
+        if (i)
+            parts.push(String.fromCharCode.apply(String, chunk.slice(0, i)));
+        return parts.join("");
+    }
+    return String.fromCharCode.apply(String, chunk.slice(0, i));
+};
+
+var invalidEncoding = "invalid encoding";
+
+/**
+ * Decodes a base64 encoded string to a buffer.
+ * @param {string} string Source string
+ * @param {Uint8Array} buffer Destination buffer
+ * @param {number} offset Destination offset
+ * @returns {number} Number of bytes written
+ * @throws {Error} If encoding is invalid
+ */
+base64.decode = function decode(string, buffer, offset) {
+    var start = offset;
+    var j = 0, // goto index
+        t;     // temporary
+    for (var i = 0; i < string.length;) {
+        var c = string.charCodeAt(i++);
+        if (c === 61 && j > 1)
+            break;
+        if ((c = s64[c]) === undefined)
+            throw Error(invalidEncoding);
+        switch (j) {
+            case 0:
+                t = c;
+                j = 1;
+                break;
+            case 1:
+                buffer[offset++] = t << 2 | (c & 48) >> 4;
+                t = c;
+                j = 2;
+                break;
+            case 2:
+                buffer[offset++] = (t & 15) << 4 | (c & 60) >> 2;
+                t = c;
+                j = 3;
+                break;
+            case 3:
+                buffer[offset++] = (t & 3) << 6 | c;
+                j = 0;
+                break;
+        }
+    }
+    if (j === 1)
+        throw Error(invalidEncoding);
+    return offset - start;
+};
+
+/**
+ * Tests if the specified string appears to be base64 encoded.
+ * @param {string} string String to test
+ * @returns {boolean} `true` if probably base64 encoded, otherwise false
+ */
+base64.test = function test(string) {
+    return /^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=)?$/.test(string);
+};