Symbian平台下Base64編碼及解碼

TImCodecB64類是symbian平台下提供的Base64編碼解碼類，你在官方文檔的sdk可能找不到關於Base64編碼解碼類的描述。但是此類確實存在於sdk的開發包中，在這裡給出TImCodecB64類的簡單用法示範。

Contents [hide] 1 範例程式碼 2 BASE64編碼 3 BASE64解碼 4 提示

範例程式碼

#include  "imcvcodc.h" //base64 聲明標頭檔

static HBufC8* Base64EncodeLC(const TDesC8 & aSourceBuf)
{ 
    TImCodecB64 B64;
//Using base64 the size is increased by 1/3
    HBufC8 * buffer = HBufC8::NewL(aSourceBuf.Length() + aSourceBuf.Length()/3);
    B64.Initialise();
    TPtr8 buffPtr = buffer->Des();
    B64.Encode(aSourceBuf, buffPtr);
return  buffer;
}

static HBufC8* Base64DecodeLC(const TDesC8 & aSourceBuf)
{
    TImCodecB64 B64;
    HBufC8 * buffer = HBufC8::NewLC(aSourceBuf.Length());
    B64.Initialise();
    TPtr8 buffPtr = buffer->Des();
    B64.Decode(aSourceBuf, buffPtr);
return  buffer;
}

BASE64編碼

//encode string to base64 encoding with clean stack
HBufC8* encodeBuf = StringUtil::Base64EncodeLC(_L8("This is test"));
//Change to TDesC16
HBufC *buff16 = HBufC::NewLC(ptr.Length());
buff16->Des().Copy(ptr);
//Do something....
...
//clean buffer
CleanupStack::PopAndDestroy(2);

結果

VGhpcyBpcyB0ZXN0

BASE64解碼

//Decode base64 encoding with clean stack
HBufC8* decodeBuf = StringUtil::Base64DecodeLC(_L8("VGhpcyBpcyB0ZXN0"));

//Change to TDesC16
HBufC *buff16 = HBufC::NewLC(ptr.Length());
buff16->Des().Copy(ptr);
//Do something 
...
//clean buffer
CleanupStack::PopAndDestroy(2);

結果

This is test

提示

除了需要包含"imcvcodc.h"標頭檔外，你還需要在.mmp檔案中加入 imut.lib