static const char b64[] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
size_t len = strlen( src );
+ const uint8_t *in = (const uint8_t *)src;
char *ret;
char *dst = (char *)malloc( ( len + 4 ) * 4 / 3 );
while( len > 0 )
{
/* pops (up to) 3 bytes of input, push 4 bytes */
- uint32_t v = *src++ << 24; // 1/3
+ uint32_t v = *in++ << 24; // 1/3
*dst++ = b64[v >> 26]; // 1/4
v = v << 6;
if( len >= 2 )
- v |= *src++ << 16; // 2/3
+ v |= *in++ << 22; // 2/3
*dst++ = b64[v >> 26]; // 2/4
v = v << 6;
if( len >= 3 )
- v |= *src++ << 8; // 3/3
+ v |= *in++ << 20; // 3/3
*dst++ = ( len >= 2 ) ? b64[v >> 26] : '='; // 3/4
v = v << 6;