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authorDenys Vlasenko2015-10-19 19:13:06 +0200
committerDenys Vlasenko2015-10-19 19:13:06 +0200
commitd1ed3e68b8080161642cc106099c0a17ac7892e6 (patch)
treed286f6fc0a7bf0ec68e2c27810ef7b3a0c863a5b /coreutils
parentfd19faf70569ca3173a94cf19ecc9b60efe3f480 (diff)
downloadbusybox-d1ed3e68b8080161642cc106099c0a17ac7892e6.zip
busybox-d1ed3e68b8080161642cc106099c0a17ac7892e6.tar.gz
sort: code shrink
function old new delta compare_keys 738 695 -43 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'coreutils')
-rw-r--r--coreutils/sort.c40
1 files changed, 22 insertions, 18 deletions
diff --git a/coreutils/sort.c b/coreutils/sort.c
index c2e8bb8..f2bc533 100644
--- a/coreutils/sort.c
+++ b/coreutils/sort.c
@@ -291,7 +291,7 @@ static int compare_keys(const void *xarg, const void *yarg)
else if (!yy)
retval = 1;
else
- retval = (dx == thyme.tm_mon) ? 0 : dx - thyme.tm_mon;
+ retval = dx - thyme.tm_mon;
break;
}
/* Full floating point version of -n */
@@ -317,8 +317,8 @@ static int compare_keys(const void *xarg, const void *yarg)
/* Perform fallback sort if necessary */
if (!retval && !(option_mask32 & FLAG_s)) {
- retval = strcmp(*(char **)xarg, *(char **)yarg);
flags = option_mask32;
+ retval = strcmp(*(char **)xarg, *(char **)yarg);
}
if (flags & FLAG_r)
@@ -346,7 +346,7 @@ int sort_main(int argc UNUSED_PARAM, char **argv)
char *line, **lines;
char *str_ignored, *str_o, *str_t;
llist_t *lst_k = NULL;
- int i, flag;
+ int i;
int linecount;
unsigned opts;
@@ -369,7 +369,7 @@ int sort_main(int argc UNUSED_PARAM, char **argv)
/* note: below this point we use option_mask32, not opts,
* since that reduces register pressure and makes code smaller */
- /* parse sort key */
+ /* Parse sort key */
while (lst_k) {
enum {
FLAG_allowed_for_k =
@@ -396,17 +396,18 @@ int sort_main(int argc UNUSED_PARAM, char **argv)
key->range[2*i+1] = str2u(&str_k);
}
while (*str_k) {
- const char *temp2;
+ int flag;
+ const char *idx;
if (*str_k == ',' && !i++) {
str_k++;
break;
} /* no else needed: fall through to syntax error
because comma isn't in OPT_STR */
- temp2 = strchr(OPT_STR, *str_k);
- if (!temp2)
+ idx = strchr(OPT_STR, *str_k);
+ if (!idx)
bb_error_msg_and_die("unknown key option");
- flag = 1 << (temp2 - OPT_STR);
+ flag = 1 << (idx - OPT_STR);
if (flag & ~FLAG_allowed_for_k)
bb_error_msg_and_die("unknown sort type");
/* b after ',' means strip _trailing_ space */
@@ -440,10 +441,10 @@ int sort_main(int argc UNUSED_PARAM, char **argv)
} while (*++argv);
#if ENABLE_FEATURE_SORT_BIG
- /* if no key, perform alphabetic sort */
+ /* If no key, perform alphabetic sort */
if (!key_list)
add_key()->range[0] = 1;
- /* handle -c */
+ /* Handle -c */
if (option_mask32 & FLAG_c) {
int j = (option_mask32 & FLAG_u) ? -1 : 0;
for (i = 1; i < linecount; i++) {
@@ -457,20 +458,21 @@ int sort_main(int argc UNUSED_PARAM, char **argv)
#endif
/* Perform the actual sort */
qsort(lines, linecount, sizeof(lines[0]), compare_keys);
- /* handle -u */
+
+ /* Handle -u */
if (option_mask32 & FLAG_u) {
- flag = 0;
+ int j = 0;
/* coreutils 6.3 drop lines for which only key is the same */
/* -- disabling last-resort compare... */
option_mask32 |= FLAG_s;
for (i = 1; i < linecount; i++) {
- if (compare_keys(&lines[flag], &lines[i]) == 0)
+ if (compare_keys(&lines[j], &lines[i]) == 0)
free(lines[i]);
else
- lines[++flag] = lines[i];
+ lines[++j] = lines[i];
}
if (linecount)
- linecount = flag+1;
+ linecount = j+1;
}
/* Print it */
@@ -479,9 +481,11 @@ int sort_main(int argc UNUSED_PARAM, char **argv)
if (option_mask32 & FLAG_o)
xmove_fd(xopen(str_o, O_WRONLY|O_CREAT|O_TRUNC), STDOUT_FILENO);
#endif
- flag = (option_mask32 & FLAG_z) ? '\0' : '\n';
- for (i = 0; i < linecount; i++)
- printf("%s%c", lines[i], flag);
+ {
+ int ch = (option_mask32 & FLAG_z) ? '\0' : '\n';
+ for (i = 0; i < linecount; i++)
+ printf("%s%c", lines[i], ch);
+ }
fflush_stdout_and_exit(EXIT_SUCCESS);
}