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622 B

#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) {
if (dest) dest[written]=base64[temp&63];
while (written&3) { if (dest) dest[written]='='; ++written; }
return written;