diff options
| author | altaf-creator <dev@altafcreator.com> | 2025-11-09 11:15:19 +0800 |
|---|---|---|
| committer | altaf-creator <dev@altafcreator.com> | 2025-11-09 11:15:19 +0800 |
| commit | 8eff962cab608341a6f2fedc640a0e32d96f26e2 (patch) | |
| tree | 05534d1a720ddc3691d346c69b4972555820a061 /frontend-old/node_modules/@protobufjs/base64/index.js | |
pain
Diffstat (limited to 'frontend-old/node_modules/@protobufjs/base64/index.js')
| -rw-r--r-- | frontend-old/node_modules/@protobufjs/base64/index.js | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/frontend-old/node_modules/@protobufjs/base64/index.js b/frontend-old/node_modules/@protobufjs/base64/index.js new file mode 100644 index 0000000..26d5443 --- /dev/null +++ b/frontend-old/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);
+};
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