+ int flags = option_mask32, retval = 0;
+ char *x, *y;
+
+#if ENABLE_FEATURE_SORT_BIG
+ struct sort_key *key;
+
+ for (key = key_list; !retval && key; key = key->next_key) {
+ flags = key->flags ? key->flags : option_mask32;
+ /* Chop out and modify key chunks, handling -dfib */
+ x = get_key(*(char **)xarg, key, flags);
+ y = get_key(*(char **)yarg, key, flags);
+#else
+ /* This curly bracket serves no purpose but to match the nesting
+ level of the for () loop we're not using */
+ {
+ x = *(char **)xarg;
+ y = *(char **)yarg;
+#endif
+ /* Perform actual comparison */
+ switch (flags & 7) {
+ default:
+ bb_error_msg_and_die("unknown sort type");
+ break;
+ /* Ascii sort */
+ case 0:
+#if ENABLE_LOCALE_SUPPORT
+ retval = strcoll(x, y);
+#else
+ retval = strcmp(x, y);
+#endif
+ break;
+#if ENABLE_FEATURE_SORT_BIG
+ case FLAG_g: {
+ char *xx, *yy;
+ double dx = strtod(x, &xx);
+ double dy = strtod(y, &yy);
+ /* not numbers < NaN < -infinity < numbers < +infinity) */
+ if (x == xx)
+ retval = (y == yy ? 0 : -1);
+ else if (y == yy)
+ retval = 1;
+ /* Check for isnan */
+ else if (dx != dx)
+ retval = (dy != dy) ? 0 : -1;
+ else if (dy != dy)
+ retval = 1;
+ /* Check for infinity. Could underflow, but it avoids libm. */
+ else if (1.0 / dx == 0.0) {
+ if (dx < 0)
+ retval = (1.0 / dy == 0.0 && dy < 0) ? 0 : -1;
+ else
+ retval = (1.0 / dy == 0.0 && dy > 0) ? 0 : 1;
+ } else if (1.0 / dy == 0.0)
+ retval = (dy < 0) ? 1 : -1;
+ else
+ retval = (dx > dy) ? 1 : ((dx < dy) ? -1 : 0);
+ break;
+ }
+ case FLAG_M: {
+ struct tm thyme;
+ int dx;
+ char *xx, *yy;
+
+ xx = strptime(x, "%b", &thyme);
+ dx = thyme.tm_mon;
+ yy = strptime(y, "%b", &thyme);
+ if (!xx)
+ retval = (!yy) ? 0 : -1;
+ else if (!yy)
+ retval = 1;
+ else
+ retval = (dx == thyme.tm_mon) ? 0 : dx - thyme.tm_mon;
+ break;
+ }
+ /* Full floating point version of -n */
+ case FLAG_n: {
+ double dx = atof(x);
+ double dy = atof(y);
+ retval = (dx > dy) ? 1 : ((dx < dy) ? -1 : 0);
+ break;
+ }
+ } /* switch */
+ /* Free key copies. */
+ if (x != *(char **)xarg) free(x);
+ if (y != *(char **)yarg) free(y);
+ /* if (retval) break; - done by for () anyway */
+#else
+ /* Integer version of -n for tiny systems */
+ case FLAG_n:
+ retval = atoi(x) - atoi(y);
+ break;
+ } /* switch */
+#endif
+ } /* for */
+
+ /* Perform fallback sort if necessary */
+ if (!retval && !(option_mask32 & FLAG_s))
+ retval = strcmp(*(char **)xarg, *(char **)yarg);
+
+ if (flags & FLAG_r) return -retval;
+ return retval;