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uni_modules/x-base64toarraybuff-s/utssdk/app-android/index.uts

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+import Base64 from "android.util.Base64"
+import ByteBuffer from 'java.nio.ByteBuffer';
+
+export const base64ToArrayBuffer = (data : string) :ArrayBuffer => {
+	return ArrayBuffer.fromByteBuffer(ByteBuffer.wrap(Base64.decode(data, Base64.DEFAULT)))
+}
+
+export const arrayBufferToBase64 = (data : ArrayBuffer) : string => {
+	return Base64.encodeToString(data.toByteBuffer().array(),Base64.DEFAULT)
+}

uni_modules/x-base64toarraybuff-s/utssdk/app-harmony/config.json

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+{
+	"dependencies": {
+		"x_library_s": "./lib/x_library_s.har"
+	}
+}

uni_modules/x-base64toarraybuff-s/utssdk/app-harmony/index.uts

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+import { util } from "@kit.ArkTS";
+import { BusinessError } from "@kit.BasicServicesKit";
+
+/**
+ * 将base64数据转换为arraybuffer
+ * @param data base64数据
+ * @returns Promise<ArrayBuffer>
+ */
+function btoa_x(data: string): ArrayBuffer {
+  const base64 = new util.Base64Helper();
+  const dataSplit = data.split(",");
+  const uint8Array = base64.decodeSync(dataSplit.length > 1 ? data.split(",")[1] : data);
+  const buffer: ArrayBuffer = uint8Array.buffer.slice(0, uint8Array.byteLength);
+
+  return buffer
+}
+
+function  atob_x(data:ArrayBuffer){
+  const base64 = new util.Base64Helper();
+  const unit8data = new Uint8Array(data)
+  return base64.encodeToStringSync(unit8data)
+}
+
+export const base64ToArrayBuffer = (data : string) :ArrayBuffer => {
+	try {
+		return btoa_x(data)
+	} catch (error) {
+		const e = error as BusinessError;
+		console.error("TMUI",e.message)
+		return new ArrayBuffer(0)
+	}
+}
+
+export const arrayBufferToBase64 = (data : ArrayBuffer) : string => {
+	try {
+		return atob_x(data)
+	} catch (error) {
+		const e = error as BusinessError;
+		console.error("TMUI",e.message)
+		return ''
+	}
+}

uni_modules/x-base64toarraybuff-s/utssdk/app-ios/PrivacyInfo.xcprivacy

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>NSPrivacyAccessedAPITypes</key>
+	<array/>
+	<key>NSPrivacyCollectedDataTypes</key>
+	<array/>
+	<key>NSPrivacyTracking</key>
+	<false/>
+	<key>NSPrivacyTrackingDomains</key>
+	<array/>
+</dict>
+</plist>

uni_modules/x-base64toarraybuff-s/utssdk/app-ios/config.json

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+{
+  "deploymentTarget": "12"
+}

uni_modules/x-base64toarraybuff-s/utssdk/app-ios/index.uts

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+import { Data } from 'Foundation';
+export const base64ToArrayBuffer = (data : string) : ArrayBuffer => {
+	let dadx = new Data(base64Encoded = data)
+	if(dadx == null) return new ArrayBuffer(0)
+	return ArrayBuffer.fromData(dadx!)
+	
+}
+
+export const arrayBufferToBase64 = (data : ArrayBuffer) : string => {
+	let dadx = data.toData()
+	return dadx.base64EncodedString()
+}

uni_modules/x-base64toarraybuff-s/utssdk/mp-weixin/base64ToArraybuffer.uts

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+
+const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
+let lookup = typeof Uint8Array === 'undefined' ? [] : new Uint8Array(256);
+for (let i = 0; i < chars.length; i++) {
+	lookup[chars.charCodeAt(i)] = i;
+}
+export const encode = function (arraybuffer) {
+	let bytes = new Uint8Array(arraybuffer), i, len = bytes.length, base64 = '';
+	for (i = 0; i < len; i += 3) {
+		base64 += chars[bytes[i] >> 2];
+		base64 += chars[((bytes[i] & 3) << 4) | (bytes[i + 1] >> 4)];
+		base64 += chars[((bytes[i + 1] & 15) << 2) | (bytes[i + 2] >> 6)];
+		base64 += chars[bytes[i + 2] & 63];
+	}
+	if (len % 3 === 2) {
+		base64 = base64.substring(0, base64.length - 1) + '=';
+	}
+	else if (len % 3 === 1) {
+		base64 = base64.substring(0, base64.length - 2) + '==';
+	}
+	return base64;
+};
+
+export const decode = function (base64) {
+	let bufferLength = base64.length * 0.75, len = base64.length, i, p = 0, encoded1, encoded2, encoded3, encoded4;
+	if (base64[base64.length - 1] === '=') {
+		bufferLength--;
+		if (base64[base64.length - 2] === '=') {
+			bufferLength--;
+		}
+	}
+	let arraybuffer = new ArrayBuffer(bufferLength), bytes = new Uint8Array(arraybuffer);
+	for (i = 0; i < len; i += 4) {
+		encoded1 = lookup[base64.charCodeAt(i)];
+		encoded2 = lookup[base64.charCodeAt(i + 1)];
+		encoded3 = lookup[base64.charCodeAt(i + 2)];
+		encoded4 = lookup[base64.charCodeAt(i + 3)];
+		bytes[p++] = (encoded1 << 2) | (encoded2 >> 4);
+		bytes[p++] = ((encoded2 & 15) << 4) | (encoded3 >> 2);
+		bytes[p++] = ((encoded3 & 3) << 6) | (encoded4 & 63);
+	}
+	return arraybuffer;
+};

uni_modules/x-base64toarraybuff-s/utssdk/mp-weixin/index.uts

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+import {decode,encode} from "./base64ToArraybuffer.uts"
+
+export const base64ToArrayBuffer = (data : string) :ArrayBuffer => {
+	return decode(data)
+}
+
+export const arrayBufferToBase64 = (data : ArrayBuffer) : string => {
+	return encode(data)
+}

uni_modules/x-base64toarraybuff-s/utssdk/web/base64ToArraybuffer.uts

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+
+const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
+let lookup = typeof Uint8Array === 'undefined' ? [] : new Uint8Array(256);
+for (let i = 0; i < chars.length; i++) {
+	lookup[chars.charCodeAt(i)] = i;
+}
+export const encode = function (arraybuffer) {
+	let bytes = new Uint8Array(arraybuffer), i, len = bytes.length, base64 = '';
+	for (i = 0; i < len; i += 3) {
+		base64 += chars[bytes[i] >> 2];
+		base64 += chars[((bytes[i] & 3) << 4) | (bytes[i + 1] >> 4)];
+		base64 += chars[((bytes[i + 1] & 15) << 2) | (bytes[i + 2] >> 6)];
+		base64 += chars[bytes[i + 2] & 63];
+	}
+	if (len % 3 === 2) {
+		base64 = base64.substring(0, base64.length - 1) + '=';
+	}
+	else if (len % 3 === 1) {
+		base64 = base64.substring(0, base64.length - 2) + '==';
+	}
+	return base64;
+};
+
+export const decode = function (base64) {
+	let bufferLength = base64.length * 0.75, len = base64.length, i, p = 0, encoded1, encoded2, encoded3, encoded4;
+	if (base64[base64.length - 1] === '=') {
+		bufferLength--;
+		if (base64[base64.length - 2] === '=') {
+			bufferLength--;
+		}
+	}
+	let arraybuffer = new ArrayBuffer(bufferLength), bytes = new Uint8Array(arraybuffer);
+	for (i = 0; i < len; i += 4) {
+		encoded1 = lookup[base64.charCodeAt(i)];
+		encoded2 = lookup[base64.charCodeAt(i + 1)];
+		encoded3 = lookup[base64.charCodeAt(i + 2)];
+		encoded4 = lookup[base64.charCodeAt(i + 3)];
+		bytes[p++] = (encoded1 << 2) | (encoded2 >> 4);
+		bytes[p++] = ((encoded2 & 15) << 4) | (encoded3 >> 2);
+		bytes[p++] = ((encoded3 & 3) << 6) | (encoded4 & 63);
+	}
+	return arraybuffer;
+};

uni_modules/x-base64toarraybuff-s/utssdk/web/index.uts

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+import {decode,encode} from "./base64ToArraybuffer.uts"
+
+export const base64ToArrayBuffer = (data : string) :ArrayBuffer => {
+	return decode(data)
+}
+
+export const arrayBufferToBase64 = (data : ArrayBuffer) : string => {
+	return encode(data)
+}