Base64Encoder Class Reference

#include <TransferEncoding.h>

Static Public Member Functions
static ByteString	encode (const ByteString &_str)

Detailed Description

Definition at line 39 of file TransferEncoding.h.

Member Function Documentation

encode()

ByteString Base64Encoder::encode ( const ByteString & _str )

static

Definition at line 193 of file TransferEncoding.cpp.

{
    __DCL_ASSERT(_str.length() > 0);
 
    size_t nAllocLength = ((_str.length() + 2) / 3) * 4;
    nAllocLength += 2 * ((nAllocLength / MAX_LINE_LENGTH) + 1);  //  + 1;
 
    ByteBuffer* buf = ByteBuffer::create(nAllocLength);
    byte_t* dest = (byte_t*) buf->data();
 
    const byte_t* src = (byte_t*)_str.data();
    size_t len = _str.length();
    for(size_t i = 1; len >= 3; len -= 3, src += 3)
    {
        *dest++ = aBase64Table[src[0] >> 2];
        *dest++ = aBase64Table[((src[0] & 0x03) << 4) + (src[1] >> 4)];
        *dest++ = aBase64Table[((src[1] & 0x0f) << 2) + (src[2] >> 6)];
        *dest++ = aBase64Table[src[2] & 0x3f];
        if ((i++) == 19)    // reached MAX_LINE_LENGTH == (i * 4) == 76
        {
            *dest++ = CR;
            *dest++ = LF;
            i = 1;
        }
    }
 
    if (len)
    {
        *dest++ = aBase64Table[src[0] >> 2];
        if (len > 1)
        {
            *dest++ = aBase64Table[((src[0] & 0x03) << 4) + (src[1] >> 4)];
            *dest++ = aBase64Table[((src[1] & 0x0f) << 2)];
            *dest++ = BASE64_PADDING_CHAR;
        }
        else
        {
            *dest++ = aBase64Table[((src[0] & 0x03) << 4)];
            *dest++ = BASE64_PADDING_CHAR;
            *dest++ = BASE64_PADDING_CHAR;
        }
    }
 
    *dest++ = CR;
    *dest++ = LF;
 
    *dest = __T('\0');
    __DCL_ASSERT(buf->data() <= (char*) dest);
    buf->__dataLength = (char*) dest - buf->data();
    __DCL_ASSERT(buf->__dataLength <= buf->__allocLength);
 
    ByteString r = buf;
    buf->release();
    return r;
}

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The documentation for this class was generated from the following files:

• TransferEncoding.h
• TransferEncoding.cpp