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simplify b64_encode()

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maybe this should be moved to libavutil ...

Originally committed as revision 5782 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2006-07-18 18:51:35 +00:00
parent 4b45de0e87
commit 7028259a0d
1 changed files with 9 additions and 23 deletions
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32
libavformat/http.c
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@ -285,6 +285,7 @@ URLProtocol http_protocol = {
/*****************************************************************************
* b64_encode: stolen from VLC's http.c
* simplified by michael
*****************************************************************************/
static char *b64_encode( const unsigned char *src )
@ -300,32 +301,17 @@ static char *b64_encode( const unsigned char *src )
}else
return NULL;
for( ;; )
{
if( *src )
{
i_bits = ( i_bits << 8 )|( *src++ );
i_shift += 8;
}
else if( i_shift > 0 )
{
i_bits <<= 6 - i_shift;
i_shift = 6;
}
else
{
*dst++ = '=';
break;
}
while(*src){
i_bits = (i_bits << 8) + *src++;
i_shift += 8;
while( i_shift >= 6 )
{
do{
*dst++ = b64[(i_bits << 6 >> i_shift) & 0x3f];
i_shift -= 6;
*dst++ = b64[(i_bits >> i_shift)&0x3f];
}
}while( i_shift > 6 || (*src == 0 && i_shift>0));
}
*dst++ = '\0';
*dst++ = '=';
*dst = '\0';
return ret;
}