gchar *base64_encode (guint len, const gchar *str, gboolean split_lines)
{
guint i;
GString *tmp;
/* TODO: calculate requisite output string length and allocate that big a
* GString */
tmp = g_string_new ("");
for (i = 0; i < len; i += 3)
{
guint c1, c2, c3, c4;
if (split_lines && i > 0 && (i * 4) % 76 == 0)
g_string_append_c (tmp, '\n');
switch (i + 3 - len)
{
case 1:
c1 = encoding[GET_6_BITS_0 (str + i)];
c2 = encoding[GET_6_BITS_1 (str + i)];
/* can't use GET_6_BITS_2 because str[i+2] is out of range */
c3 = encoding[(str[i + 1] & 0x0f) << 2];
c4 = '=';
break;
case 2:
c1 = encoding[GET_6_BITS_0 (str + i)];
/* can't use GET_6_BITS_1 because str[i+1] is out of range */
c2 = encoding[(str[i] & 0x03) << 4];
c3 = '=';
c4 = '=';
break;
default:
c1 = encoding[GET_6_BITS_0 (str + i)];
c2 = encoding[GET_6_BITS_1 (str + i)];
c3 = encoding[GET_6_BITS_2 (str + i)];
c4 = encoding[GET_6_BITS_3 (str + i)];
}
g_string_append_printf (tmp, "%c%c%c%c", c1, c2, c3, c4);
}
return g_string_free (tmp, FALSE);
}
gchar *_lm_base64_encode (const gchar *txt, gsize n)
{
guint i;
guint len;
GString *tmp;
GString *str = g_string_new_len (txt, n);
len = str->len;
/* TODO: calculate requisite output string length and allocate that big a
* GString */
tmp = g_string_new ("");
for (i = 0; i < len; i += 3)
{
guint c1, c2, c3, c4;
switch (i + 3 - len)
{
case 1:
c1 = encoding[GET_6_BITS_0 (str->str + i)];
c2 = encoding[GET_6_BITS_1 (str->str + i)];
c3 = encoding[GET_6_BITS_2 (str->str + i)];
c4 = '=';
break;
case 2:
c1 = encoding[GET_6_BITS_0 (str->str + i)];
c2 = encoding[GET_6_BITS_1 (str->str + i)];
c3 = '=';
c4 = '=';
break;
default:
c1 = encoding[GET_6_BITS_0 (str->str + i)];
c2 = encoding[GET_6_BITS_1 (str->str + i)];
c3 = encoding[GET_6_BITS_2 (str->str + i)];
c4 = encoding[GET_6_BITS_3 (str->str + i)];
}
g_string_append_printf (tmp, "%c%c%c%c", c1, c2, c3, c4);
}
return g_string_free (tmp, FALSE);
}