int uniq_main(int argc UNUSED_PARAM, char **argv)
{
FILE *in, *out;
const char *s0, *e0, *s1, *e1, *input_filename;
unsigned long dups;
unsigned skip_fields, skip_chars, max_chars;
unsigned opt;
unsigned i;
enum {
OPT_c = 0x1,
OPT_d = 0x2,
OPT_u = 0x4,
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;
in = xgetoptfile_uniq_s(argv, 0);
if (*argv) {
++argv;
}
out = xgetoptfile_uniq_s(argv, 2);
if (*argv && argv[1]) {
bb_show_usage();
}
s1 = e1 = NULL; /* prime the pump */
do {
s0 = s1;
e0 = e1;
dups = 0;
/* gnu uniq ignores newlines */
while ((s1 = xmalloc_fgetline(in)) != NULL) {
e1 = s1;
for (i = skip_fields; i; i--) {
e1 = skip_whitespace(e1);
e1 = skip_non_whitespace(e1);
}
for (i = skip_chars; *e1 && i; i--) {
++e1;
}
if (!s0 || strncmp(e0, e1, max_chars)) {
break;
}
++dups; /* note: testing for overflow seems excessive. */
}
if (s0) {
if (!(opt & (OPT_d << !!dups))) { /* (if dups, opt & OPT_e) */
fprintf(out, "\0%ld " + (opt & 1), dups + 1); /* 1 == OPT_c */
fprintf(out, "%s\n", s0);
}
free((void *)s0);
}
} while (s1);
die_if_ferror(in, input_filename);
fflush_stdout_and_exit(EXIT_SUCCESS);
}
int uniq_main(int argc, char **argv)
{
FILE *in, *out;
unsigned long dups, skip_fields, skip_chars, i, uniq_flags;
const char *s0, *e0, *s1, *e1, *input_filename;
int opt;
uniq_flags = skip_fields = skip_chars = 0;
while ((opt = getopt(argc, argv, uniq_opts)) > 0) {
if ((opt == 'f') || (opt == 's')) {
int t = bb_xgetularg10(optarg);
if (opt == 'f') {
skip_fields = t;
} else {
skip_chars = t;
}
} else if ((s0 = strchr(uniq_opts, opt)) != NULL) {
uniq_flags |= s0[4];
} else {
bb_show_usage();
}
}
input_filename = *(argv += optind);
in = xgetoptfile_uniq_s(argv, 0);
if (*argv) {
++argv;
}
out = xgetoptfile_uniq_s(argv, 2);
if (*argv && argv[1]) {
bb_show_usage();
}
s1 = e1 = NULL; /* prime the pump */
do {
s0 = s1;
e0 = e1;
dups = 0;
/* gnu uniq ignores newlines */
while ((s1 = bb_get_chomped_line_from_file(in)) != NULL) {
e1 = s1;
for (i=skip_fields ; i ; i--) {
e1 = bb_skip_whitespace(e1);
while (*e1 && !isspace(*e1)) {
++e1;
}
}
for (i = skip_chars ; *e1 && i ; i--) {
++e1;
}
if (!s0 || strcmp(e0, e1)) {
break;
}
++dups; /* Note: Testing for overflow seems excessive. */
}
if (s0) {
if (!(uniq_flags & (2 << !!dups))) {
bb_fprintf(out, "\0%d " + (uniq_flags & 1), dups + 1);
bb_fprintf(out, "%s\n", s0);
}
free((void *)s0);
}
} while (s1);
bb_xferror(in, input_filename);
bb_fflush_stdout_and_exit(EXIT_SUCCESS);
}
