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Inlined decode_base64()

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Bobbi Webber-Manners 2020-07-28 23:45:56 -04:00
parent 854227751d
commit 24f022f0bd
1 changed files with 17 additions and 1 deletions
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18
apps/email.c
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@ -584,12 +584,14 @@ static const int8_t b64dec[] =
32,33,34,35,36,37,38,39,40,41,
42,43,44,45,46,47,48,49,50,51};
/*
* Decode Base64 format in place
* Each line of base64 has up to 76 chars, which decodes to up to 57 bytes
* p - Pointer to buffer to decode. Results written in place.
* Returns number of bytes decoded
*/
#if 0
uint16_t decode_base64(char *p) {
uint16_t i = 0, j = 0;
const int8_t *b = b64dec - 43;
@ -603,6 +605,7 @@ uint16_t decode_base64(char *p) {
}
return j;
}
#endif
/*
* Print line up to first '\r' or '\0'
@ -815,6 +818,7 @@ void email_pager(struct emailhdrs *h) {
uint32_t pos = 0;
uint8_t *cursorrow = (uint8_t*)CURSORROW, mime = 0;
FILE *sbackfp = NULL;
const int8_t *b = b64dec - 43;
FILE *attachfp;
uint16_t linecount, chars;
uint8_t mime_enc, mime_binary, eof, screennum, maxscreennum;
@ -930,7 +934,19 @@ restart:
chars = decode_quoted_printable(writep);
break;
case ENC_B64:
chars = decode_base64(writep);
//chars = decode_base64(writep);
{
uint16_t i = 0, j = 0;
while (writep[i] != '\r') {
writep[j++] = b[writep[i]] << 2 | b[writep[i + 1]] >> 4;
if (writep[i + 2] != '=')
writep[j++] = b[writep[i + 1]] << 4 | b[writep[i + 2]] >> 2;
if (linebuf[i + 3] != '=')
writep[j++] = b[writep[i + 2]] << 6 | b[writep[i + 3]];
i += 4;
}
chars = j;
}
break;
case ENC_SKIP:
readp = writep = NULL;