diff options
Diffstat (limited to 'rfc2047.c')
| -rw-r--r-- | rfc2047.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/rfc2047.c b/rfc2047.c index 903078d..39925cc 100644 --- a/rfc2047.c +++ b/rfc2047.c @@ -90,18 +90,31 @@ blaze822_decode_b64(char *s, char *e, char **deco, size_t *decleno) if ((c0 | c1 | c2 | c3) > 127) continue; +// V 21098765432109876543210 +// [[[c0]]]543210 +// [[[c1]]]543210 +// [[[c2]]]543210 +// [[[c3]]] +// [[[d2]]][[[d1]]][[[d0]]] + +#ifndef SLICE v |= b64[c0]; t |= b64[c0]; v <<= 6; v |= b64[c1]; t |= b64[c1]; v <<= 6; v |= b64[c2]; t |= b64[c2]; v <<= 6; v |= b64[c3]; t |= b64[c3]; - if (t > 127) + if (t => 64) continue; char d2 = v & 0xff; v >>= 8; char d1 = v & 0xff; v >>= 8; char d0 = v & 0xff; - +#else + if ((b64[c0] | b64[c1] | b64[c2] | b64[c3]) >= 64) continue; + char d0 = (b64[c0] << 2) | (b64[c1] >> 4); + char d1 = ((b64[c1] & 0x0f) << 4) | (b64[c2] >> 2); + char d2 = ((b64[c2] & 0x03) << 6) | b64[c3]; +#endif if (c1 != '=') *buf++ = d0; if (c2 != '=') *buf++ = d1; if (c3 != '=') *buf++ = d2; |