80     size_t i, n;  in mbedtls_base64_encode()  local
90     n = slen / 3 + ( slen % 3 != 0 );  in mbedtls_base64_encode()
92     if( n > ( BASE64_SIZE_T_MAX - 1 ) / 4 )  in mbedtls_base64_encode()
98     n *= 4;  in mbedtls_base64_encode()
100     if( ( dlen < n + 1 ) || ( NULL == dst ) )  in mbedtls_base64_encode()
102         *olen = n + 1;  in mbedtls_base64_encode()
106     n = ( slen / 3 ) * 3;  in mbedtls_base64_encode()
108     for( i = 0, p = dst; i < n; i += 3 )  in mbedtls_base64_encode()
147     size_t i, n;  in mbedtls_base64_decode()  local
152     for( i = n = j = 0; i < slen; i++ )  in mbedtls_base64_decode()
186         n++;  in mbedtls_base64_decode()
189     if( n == 0 )  in mbedtls_base64_decode()
195     n = ( ( n * 6 ) + 7 ) >> 3;  in mbedtls_base64_decode()
196     n -= j;  in mbedtls_base64_decode()
198     if( dst == NULL || dlen < n )  in mbedtls_base64_decode()
200         *olen = n;  in mbedtls_base64_decode()
204    for( j = 3, n = x = 0, p = dst; i > 0; i--, src++ )  in mbedtls_base64_decode()
212         if( ++n == 4 )  in mbedtls_base64_decode()
214             n = 0;  in mbedtls_base64_decode()