58 lines
967 B
C
58 lines
967 B
C
|
#include <u.h>
|
||
|
#include <libc.h>
|
||
|
#include "base64.h"
|
||
|
|
||
|
void
|
||
|
usage(void)
|
||
|
{
|
||
|
fprint(2, "base64decode [file]\n");
|
||
|
exits("usage");
|
||
|
}
|
||
|
|
||
|
static void
|
||
|
decode(int fd, char *name)
|
||
|
{
|
||
|
int n;
|
||
|
long tot;
|
||
|
char *buf, *outbuf;
|
||
|
outbuf = nil;
|
||
|
buf = nil;
|
||
|
tot = 0;
|
||
|
for(;;){
|
||
|
buf = realloc(buf, tot+8192);
|
||
|
if(buf == nil)
|
||
|
sysfatal("realloc: %r");
|
||
|
if((n = read(fd, buf+tot, 8192)) < 0)
|
||
|
sysfatal("read: %r");
|
||
|
if(n == 0)
|
||
|
break;
|
||
|
tot += n;
|
||
|
}
|
||
|
buf[tot] = 0;
|
||
|
print("DEBUG: %d \n", strlen(outbuf));
|
||
|
outbuf = malloc(b64d_size(strlen(buf)));
|
||
|
b64_decode(buf, strlen(buf), outbuf);
|
||
|
if((n=write(1, outbuf, strlen(outbuf))) != strlen(outbuf))
|
||
|
sysfatal("writing bytes failed");
|
||
|
}
|
||
|
|
||
|
void
|
||
|
main(int argc, char **argv)
|
||
|
{
|
||
|
int fd;
|
||
|
char *file;
|
||
|
fd = 0;
|
||
|
file = "stdin";
|
||
|
ARGBEGIN{
|
||
|
default:
|
||
|
usage();
|
||
|
}ARGEND
|
||
|
if(argc != 0 && argc != 1)
|
||
|
usage();
|
||
|
if(argc == 1){
|
||
|
file = argv[0];
|
||
|
if((fd = open(file, OREAD)) < 0)
|
||
|
sysfatal("can'topen %s", file);
|
||
|
}
|
||
|
decode(fd, file);
|
||
|
}
|