File content as of revision 1:e448e81c416f:

//*****************************************************************************
// Copyright (C) 2014 Texas Instruments Incorporated
//
// All rights reserved. Property of Texas Instruments Incorporated.
// Restricted rights to use, duplicate or disclose this code are
// granted through contract.
// The program may not be used without the written permission of
// Texas Instruments Incorporated or against the terms and conditions
// stipulated in the agreement under which this program has been supplied,
// and under no circumstances can it be used with non-TI connectivity device.
//
//*****************************************************************************

/**
 * @defgroup base64_api
 *
 * @{
 */
#include "base64.h"

static const char g_ccB64Tbl[65] =
   "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";


void ConvertToBase64(char *pcOutStr, const char *pccInStr, int iLen)
{
    const char* pccIn = (const char *)pccInStr;
    char* pcOut;
    int iCount;
    pcOut = pcOutStr;

    //Loop in for Multiple of 24Bits and Convert to Base 64    
    for (iCount = 0; iLen - iCount >=3 ; iCount += 3,pccIn += 3)
    {       
        *pcOut++ = g_ccB64Tbl[pccIn[0] >> 2];
        *pcOut++ = g_ccB64Tbl[((pccIn[0] & 0x03)<<4) | (pccIn[1] >> 4)];
        *pcOut++ = g_ccB64Tbl[((pccIn[1] & 0x0F)<<2) | (pccIn[2] >> 6)];
        *pcOut++ = g_ccB64Tbl[pccIn[2] & 0x3f];
		
    }
	
    //Check if String is not multiple of 3 Bytes
    if (iCount != iLen)
    {
        
        unsigned char ucLastByte;

        *pcOut++ = g_ccB64Tbl[pccIn[0] >> 2];
        ucLastByte = ((pccIn[0] & 0x03)<<4);
        
      
        if (iLen - iCount > 1)
        {
            //If there are 2 Extra Bytes
            ucLastByte |= (pccIn[1] >> 4);
            *pcOut++ = g_ccB64Tbl[ucLastByte];
            *pcOut++ = g_ccB64Tbl[((pccIn[1] & 0x0F)<<2)];
        }
        else
        {
             //If there is only 1 Extra Byte
             *pcOut++ = g_ccB64Tbl[ucLastByte];
             *pcOut++ = '=';
        }            
                                
         *pcOut++ = '=';            
    }
	
    *pcOut  = '\0';
	
}

/// @}