| 38 | } |
| 39 | |
| 40 | int de64 (const char *in, char *out, int maxlen) |
| 41 | { |
| 42 | int len = 0; |
| 43 | register unsigned char digit1, digit2, digit3, digit4; |
| 44 | |
| 45 | if (in[0] == '+' && in[1] == ' ') |
| 46 | in += 2; |
| 47 | if (*in == '\r') |
| 48 | return(0); |
| 49 | |
| 50 | do { |
| 51 | digit1 = in[0]; |
| 52 | if (DECODE64(digit1) == BAD) |
| 53 | return(-1); |
| 54 | digit2 = in[1]; |
| 55 | if (DECODE64(digit2) == BAD) |
| 56 | return(-1); |
| 57 | digit3 = in[2]; |
| 58 | if (digit3 != '=' && DECODE64(digit3) == BAD) |
| 59 | return(-1); |
| 60 | digit4 = in[3]; |
| 61 | if (digit4 != '=' && DECODE64(digit4) == BAD) |
| 62 | return(-1); |
| 63 | in += 4; |
| 64 | *out++ = (DECODE64(digit1) << 2) | (DECODE64(digit2) >> 4); |
| 65 | ++len; |
| 66 | if (digit3 != '=') |
| 67 | { |
| 68 | *out++ = ((DECODE64(digit2) << 4) & 0xf0) | (DECODE64(digit3) >> 2); |
| 69 | ++len; |
| 70 | if (digit4 != '=') |
| 71 | { |
| 72 | *out++ = ((DECODE64(digit3) << 6) & 0xc0) | DECODE64(digit4); |
| 73 | ++len; |
| 74 | } |
| 75 | } |
| 76 | } while |
| 77 | (*in && *in != '\r' && digit4 != '=' && (maxlen-=4) >= 4); |
| 78 | |
| 79 | return (len); |
| 80 | } |
| 81 | |
| 82 | unsigned char hex[] = "0123456789ABCDEF"; |
| 83 |
no outgoing calls
no test coverage detected