aboutsummaryrefslogtreecommitdiffstats
path: root/contrib/libs/base64/neon32/dec_tail.c
blob: beb453a4670a0902d3ac5e10ece0b461f4240a20 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
		if (srclen-- == 0) { 
			ret = 1; 
			break; 
		} 
		if ((q = neon32_base64_table_dec[*c++]) >= 254) { 
			st.eof = 1; 
			// Treat character '=' as invalid for byte 0: 
			break; 
		} 
		st.carry = q << 2; 
		st.bytes++; 
 
	case 1:	if (srclen-- == 0) { 
			ret = 1; 
			break; 
		} 
		if ((q = neon32_base64_table_dec[*c++]) >= 254) { 
			st.eof = 1; 
			// Treat character '=' as invalid for byte 1: 
			break; 
		} 
		*o++ = st.carry | (q >> 4); 
		st.carry = q << 4; 
		st.bytes++; 
		outl++; 
 
	case 2:	if (srclen-- == 0) { 
			ret = 1; 
			break; 
		} 
		if ((q = neon32_base64_table_dec[*c++]) >= 254) { 
			st.eof = 1; 
			// When q == 254, the input char is '='. Return 1 and EOF. 
			// Technically, should check if next byte is also '=', but never mind. 
			// When q == 255, the input char is invalid. Return 0 and EOF. 
			ret = (q == 254) ? 1 : 0; 
			break; 
		} 
		*o++ = st.carry | (q >> 2); 
		st.carry = q << 6; 
		st.bytes++; 
		outl++; 
 
	case 3:	if (srclen-- == 0) { 
			ret = 1; 
			break; 
		} 
		if ((q = neon32_base64_table_dec[*c++]) >= 254) { 
			st.eof = 1; 
			// When q == 254, the input char is '='. Return 1 and EOF. 
			// When q == 255, the input char is invalid. Return 0 and EOF. 
			ret = (q == 254) ? 1 : 0; 
			break; 
		} 
		*o++ = st.carry | q; 
		st.carry = 0; 
		st.bytes = 0; 
		outl++; 
	} 
} 
state->eof = st.eof; 
state->bytes = st.bytes; 
state->carry = st.carry; 
*outlen = outl; 
return ret;