- /* tmp line holders */
- static char line[2][UNIQ_MAX];
- static int alternator = 0;
-
- if (fgets(line[alternator], UNIQ_MAX, self->in)) {
- self->a = self->b;
- self->b = line[alternator];
- alternator ^= 1;
- return self;
- }
-
- return NULL;
-}
-
-static Subject *
-subject_last(Subject *self)
-{
- self->a = self->b;
- self->b = NULL;
- return self;
-}
-
-static Subject *
-subject_study(Subject *self)
-{
- if (self->a == NULL) {
- return self;
- }
- if (self->b == NULL) {
- fprintf(self->out, "%s", self->a);
- return self;
- }
- if (strcmp(self->a, self->b) == 0) {
- self->recurrence++;
- } else {
- fprintf(self->out, "%s", self->a);
- self->recurrence = 0;
- }
- return self;
-}
-
-/* one variable is the decision algo */
-/* another variable is the printing algo */
-
-/* I don't think I have to have more than a 1 line memory
- this is the one constant */
-
-/* it seems like GNU/uniq only takes one or two files as an option */
-
-/* ________________________________________________________________________ */
-int
-uniq_main(int argc, char **argv)
-{
- int i;
- char opt;
- FILE *in, *out;
- Subject s;
-
- /* init */
- in = stdin;
- out = stdout;
-
- subject_init(&s, in, out, NULL);
- while (subject_next(&s)) {
- subject_study(&s);
- }
- subject_last(&s);
- subject_study(&s);
- exit(0);
-
- /* XXX : finish the tedious stuff */
-
- /* parse argv[] */
- for (i = 1; i < argc; i++) {
- if (argv[i][0] == '-') {
- opt = argv[i][1];
- switch (opt) {
- case 'h':
- usage(uniq_usage);
- default:
- usage(uniq_usage);
- }
- } else {
- break;
+ const char *input_filename;
+ unsigned skip_fields, skip_chars, max_chars;
+ unsigned opt;
+ char *cur_line;
+ const char *cur_compare;
+
+ enum {
+ OPT_c = 0x1,
+ OPT_d = 0x2, /* print only dups */
+ OPT_u = 0x4, /* print only uniq */
+ OPT_f = 0x8,
+ OPT_s = 0x10,
+ OPT_w = 0x20,
+ };
+
+ skip_fields = skip_chars = 0;
+ max_chars = INT_MAX;
+
+ opt_complementary = "f+:s+:w+";
+ opt = getopt32(argv, "cduf:s:w:", &skip_fields, &skip_chars, &max_chars);
+ argv += optind;
+
+ input_filename = argv[0];
+ if (input_filename) {
+ const char *output;
+
+ if (input_filename[0] != '-' || input_filename[1]) {
+ close(STDIN_FILENO); /* == 0 */
+ xopen(input_filename, O_RDONLY); /* fd will be 0 */
+ }
+ output = argv[1];
+ if (output) {
+ if (argv[2])
+ bb_show_usage();
+ if (output[0] != '-' || output[1]) {
+ // Won't work with "uniq - FILE" and closed stdin:
+ //close(STDOUT_FILENO);
+ //xopen3(output, O_WRONLY | O_CREAT | O_TRUNC, 0666);
+ xmove_fd(xopen3(output, O_WRONLY | O_CREAT | O_TRUNC, 0666), STDOUT_FILENO);
+ }
+ }