Support iTerm2 graphics protocol, replace encodeB with base64_encode

mimehead.c

@@ -350,51 +350,3 @@ decodeMIME0(Str orgstr)
     return cnv;
 }
 
-/* encoding */
-
-static char Base64Table[] =
-    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
-
-Str
-encodeB(char *a)
-{
-    unsigned char d[3];
-    unsigned char c1, c2, c3, c4;
-    int i, n_pad;
-    Str w = Strnew();
-
-    while (1) {
-	if (*a == '\0')
-	    break;
-	n_pad = 0;
-	d[1] = d[2] = 0;
-	for (i = 0; i < 3; i++) {
-	    d[i] = a[i];
-	    if (a[i] == '\0') {
-		n_pad = 3 - i;
-		break;
-	    }
-	}
-	c1 = d[0] >> 2;
-	c2 = (((d[0] << 4) | (d[1] >> 4)) & 0x3f);
-	if (n_pad == 2) {
-	    c3 = c4 = 64;
-	}
-	else if (n_pad == 1) {
-	    c3 = ((d[1] << 2) & 0x3f);
-	    c4 = 64;
-	}
-	else {
-	    c3 = (((d[1] << 2) | (d[2] >> 6)) & 0x3f);
-	    c4 = (d[2] & 0x3f);
-	}
-	Strcat_char(w, Base64Table[c1]);
-	Strcat_char(w, Base64Table[c2]);
-	Strcat_char(w, Base64Table[c3]);
-	Strcat_char(w, Base64Table[c4]);
-	if (n_pad)
-	    break;
-	a += 3;
-    }
-    return w;
-}