1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
|
#include "fmt.h"
#include "textcode.h"
#include "haveinline.h"
unsigned long fmt_base64(char* dest,const char* src,unsigned long len) {
register const unsigned char* s=(const unsigned char*) src;
unsigned short bits=0,temp=0;
unsigned long written=0,i;
for (i=0; i<len; ++i) {
temp<<=8; temp+=s[i]; bits+=8;
while (bits>6) {
if (dest) dest[written]=base64[((temp>>(bits-6))&63)];
++written; bits-=6;
}
}
if (bits) {
temp<<=(6-bits);
if (dest) dest[written]=base64[temp&63];
++written;
}
while (written&3) { if (dest) dest[written]='='; ++written; }
return written;
}
|
