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uniq: rename some variables. no code changes 

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2009-08-30 19:32:45 +02:00
parent 7218af9f83
commit 0aec9ff6b8
1 changed files with 28 additions and 23 deletions
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51
coreutils/uniq.c
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@ -18,7 +18,7 @@ static FILE *xgetoptfile_uniq_s(char **argv, int read0write2)
n = *argv;
if (n != NULL) {
if ((*n != '-') || n[1]) {
if ((n[0] != '-') || n[1]) {
return xfopen(n, "r\0w" + read0write2);
}
}
@ -29,16 +29,16 @@ int uniq_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int uniq_main(int argc UNUSED_PARAM, char **argv)
{
FILE *in, *out;
const char *s0, *e0, *s1, *e1, *input_filename;
unsigned long dups;
const char *input_filename;
unsigned skip_fields, skip_chars, max_chars;
unsigned opt;
unsigned i;
char *cur_line;
const char *cur_compare;
enum {
OPT_c = 0x1,
OPT_d = 0x2,
OPT_u = 0x4,
OPT_d = 0x2, /* print only dups */
OPT_u = 0x4, /* print only uniq */
OPT_f = 0x8,
OPT_s = 0x10,
OPT_w = 0x20,
@ -62,39 +62,44 @@ int uniq_main(int argc UNUSED_PARAM, char **argv)
bb_show_usage();
}
s1 = e1 = NULL; /* prime the pump */
cur_compare = cur_line = NULL; /* prime the pump */
do {
s0 = s1;
e0 = e1;
unsigned i;
unsigned long dups;
char *old_line;
const char *old_compare;
old_line = cur_line;
old_compare = cur_compare;
dups = 0;
/* gnu uniq ignores newlines */
while ((s1 = xmalloc_fgetline(in)) != NULL) {
e1 = s1;
while ((cur_line = xmalloc_fgetline(in)) != NULL) {
cur_compare = cur_line;
for (i = skip_fields; i; i--) {
e1 = skip_whitespace(e1);
e1 = skip_non_whitespace(e1);
cur_compare = skip_whitespace(cur_compare);
cur_compare = skip_non_whitespace(cur_compare);
}
for (i = skip_chars; *e1 && i; i--) {
++e1;
for (i = skip_chars; *cur_compare && i; i--) {
++cur_compare;
}
if (!s0 || strncmp(e0, e1, max_chars)) {
if (!old_line || strncmp(old_compare, cur_compare, max_chars)) {
break;
}
++dups; /* note: testing for overflow seems excessive. */
++dups; /* 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);
if (old_line) {
if (!(opt & (OPT_d << !!dups))) { /* (if dups, opt & OPT_u) */
fprintf(out, "\0%lu " + (opt & 1), dups + 1); /* 1 == OPT_c */
fprintf(out, "%s\n", old_line);
}
free((void *)s0);
free(old_line);
}
} while (s1);
} while (cur_line);
die_if_ferror(in, input_filename);