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/* See LICENSE file for copyright and license details. */
#include <sys/stat.h>
#include <stdio.h>
#include <string.h>
#include "util.h"
static unsigned int
b64e(unsigned char *b)
{
unsigned int o, p = b[2] | (b[1] << 8) | (b[0] << 16);
const char b64et[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
o = b64et[p & 0x3f]; p >>= 6;
o = (o << 8) | b64et[p & 0x3f]; p >>= 6;
o = (o << 8) | b64et[p & 0x3f]; p >>= 6;
o = (o << 8) | b64et[p & 0x3f];
return o;
}
static void
uuencodeb64(FILE *fp, const char *name, const char *s)
{
struct stat st;
ssize_t n, m = 0;
unsigned char buf[45], *pb;
unsigned int out[sizeof(buf)/3 + 1], *po;
if (fstat(fileno(fp), &st) < 0)
eprintf("fstat %s:", s);
printf("begin-base64 %o %s\n", st.st_mode & 0777, name);
/* write line by line */
while ((n = fread(buf, 1, sizeof(buf), fp))) {
/* clear old buffer if converting with non-multiple of 3 */
if (n != sizeof(buf) && (m = n % 3) != 0) {
buf[n] = '\0'; /* m == 2 */
if (m == 1) buf[n+1] = '\0'; /* m == 1 */
}
for (pb = buf, po = out; pb < buf + n; pb += 3)
*po++ = b64e(pb);
if (m != 0) {
unsigned int mask = 0xffffffff, dest = 0x3d3d3d3d;
/* m==2 -> 0x00ffffff; m==1 -> 0x0000ffff */
mask >>= ((3-m) << 3);
po[-1] = (po[-1] & mask) | (dest & ~mask);
}
*po++ = '\n';
fwrite(out, 1, (po - out) * sizeof(unsigned int) - 3, stdout);
}
if (ferror(fp))
eprintf("'%s' read error:", s);
puts("====");
}
static void
uuencode(FILE *fp, const char *name, const char *s)
{
struct stat st;
unsigned char buf[45], *p;
ssize_t n;
int ch;
if (fstat(fileno(fp), &st) < 0)
eprintf("fstat %s:", s);
printf("begin %o %s\n", st.st_mode & 0777, name);
while ((n = fread(buf, 1, sizeof(buf), fp))) {
ch = ' ' + (n & 0x3f);
putchar(ch == ' ' ? '`' : ch);
for (p = buf; n > 0; n -= 3, p += 3) {
if (n < 3) {
p[2] = '\0';
if (n < 2)
p[1] = '\0';
}
ch = ' ' + ((p[0] >> 2) & 0x3f);
putchar(ch == ' ' ? '`' : ch);
ch = ' ' + (((p[0] << 4) | ((p[1] >> 4) & 0xf)) & 0x3f);
putchar(ch == ' ' ? '`' : ch);
ch = ' ' + (((p[1] << 2) | ((p[2] >> 6) & 0x3)) & 0x3f);
putchar(ch == ' ' ? '`' : ch);
ch = ' ' + (p[2] & 0x3f);
putchar(ch == ' ' ? '`' : ch);
}
putchar('\n');
}
if (ferror(fp))
eprintf("'%s' read error:", s);
printf("%c\nend\n", '`');
}
static void
usage(void)
{
eprintf("usage: %s [-m] [file] name\n", argv0);
}
int
main(int argc, char *argv[])
{
FILE *fp = NULL;
void (*uuencode_f)(FILE *, const char *, const char *) = uuencode;
int ret = 0;
ARGBEGIN {
case 'm':
uuencode_f = uuencodeb64;
break;
default:
usage();
} ARGEND
if (!argc || argc > 2)
usage();
if (argc == 1 || !strcmp(argv[0], "-")) {
uuencode_f(stdin, argv[0], "<stdin>");
} else {
if (!(fp = fopen(argv[0], "r")))
eprintf("fopen %s:", argv[0]);
uuencode_f(fp, argv[1], argv[0]);
}
ret |= fp && fshut(fp, argv[0]);
ret |= fshut(stdin, "<stdin>") | fshut(stdout, "<stdout>");
return ret;
}