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- /*
- * Uudecode -- decode a uuencoded file back to binary form.
- *
- * Slightly modified from a version posted to net.sources once;
- * suitable for compilation on an IBM PC.
- *
- * modified for Lattice C on the ST - 11.05.86 by MSD
- *
- */
-
-
- #include <stdio.h>
- #include <osbind.h>
-
- char *Progname = "UUDECODE";
-
- #define USAGE "Usage: UUDECODE [file]\n"
-
- /* single character decode */
- #define DEC(c) (((c) - ' ') & 077)
-
- FILE *in, *out, *efopen(), *fopen();
-
- main(argc, argv)
- int argc; char *argv[];
- {
-
- int mode;
- char dest[128];
- char buf[80];
- /* optional input arg */
- if (argc > 1) {
- in = efopen(argv[1], "r");
- argv++; argc--;
- }
- else
- in = stdin;
- if (argc != 1) {
- fprintf(stderr, USAGE);
- exit(2);
- }
- /* search for header line */
- for (;;) {
- if (fgets(buf, sizeof buf, in) == NULL) {
- fprintf(stderr, "No begin line\n");
- exit(3);
- }
- if (strncmp(buf, "begin ", 6) == 0)
- break;
- }
- sscanf(buf, "begin %o %s", &mode, dest);
- out = efopen(dest, "wb"); /* create output file - binary output !!! */
- decode(in, out);
- fclose(out);
- if (fgets(buf, sizeof buf, in) == NULL || strcmp(buf, "end\n")) {
- fprintf(stderr, "No end line\n");
- exit(5);
- }
- }
-
- /*
- * copy from in to out, decoding as you go along.
- */
-
- decode(in, out)
- FILE *in, *out;
- {
- char buf[80];
- char *bp;
- int n;
- for (;;) {
- if (fgets(buf, sizeof buf, in) == NULL) {
- fprintf(stderr, "Short file\n");
- break;
- }
- n = DEC(buf[0]);
- if (n <= 0)
- break;
- bp = &buf[1];
- while (n > 0) {
- outdec(bp, out, n);
- bp += 4;
- n -= 3;
- }
- }
- }
-
- /*
- * output a group of 3 bytes (4 input characters).
- * the input chars are pointed to by p, they are to
- * be output to file f. n is used to tell us not to
- * output all of them at the end of the file.
- */
-
- outdec(p, f, n)
- char *p; FILE *f; int n;
- {
- int c1, c2, c3;
- c1 = DEC(*p) << 2 | DEC(p[1]) >> 4;
- c2 = DEC(p[1]) << 4 | DEC(p[2]) >> 2;
- c3 = DEC(p[2]) << 6 | DEC(p[3]);
- if (n >= 1)
- putc(c1, f);
- if (n >= 2)
- putc(c2, f);
- if (n >= 3)
- putc(c3, f);
- }
-
-
- /* fr: like read but stdio */
-
- int fr(fd, buf, cnt)
- FILE *fd; char *buf; int cnt;
- {
- int c, i;
- for (i = 0; i < cnt; i++) {
- c = getc(fd);
- if (c == EOF)
- return(i);
- buf[i] = c;
- }
- return (cnt);
- }
-
- /* If your library already has this function, use it and nuke the code below */
-
-
- /* Open a file, aborting on failure */
-
- /* Written by Bernie Roehl, June 1985 */
-
- FILE *
- efopen(fn, mode)
- char *fn, *mode;
- {
- FILE *unit;
- if ((unit = fopen(fn, mode)) == NULL)
- error("Cannot open file %s", fn);
- else
- return unit;
- }
-
- extern char *Progname;
-
- error(s1, s2)
- char *s1, *s2;
- {
- fprintf(stderr, "%s: ", Progname);
- fprintf(stderr, s1, s2);
- exit(1);
- }
-