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