*: use better isspace implementation
function old new delta
asciifile 90 106 +16
expand 653 658 +5
skip_non_whitespace 21 25 +4
bb_iswspace 25 28 +3
readcmd 1071 1072 +1
find_range 496 497 +1
singlemount 772 771 -1
ifupdown_main 2134 2133 -1
edir 370 369 -1
volume_id_set_label_string 82 79 -3
trim 85 82 -3
rtc_adjtime_is_utc 141 138 -3
rewrite 1039 1036 -3
do_cmd 4465 4462 -3
bb_dump_add 358 355 -3
awk_split 553 550 -3
fbset_main 1273 1268 -5
skip_thing 259 253 -6
get_trimmed_slice 46 39 -7
bb__parsegrent 245 238 -7
parse_file_cmd 116 108 -8
check 1532 1523 -9
bb__pgsreader 198 188 -10
dot_skip_over_ws 61 46 -15
colon 3032 3012 -20
if_readlist_proc 655 634 -21
normalize 193 165 -28
add_cmd 1162 1133 -29
get_key 528 476 -52
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 6/23 up/down: 30/-241) Total: -211 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/include/libbb.h b/include/libbb.h
index 97dbe86..fb7296f 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -1576,7 +1576,6 @@
#undef islower
#undef isprint
#undef ispunct
-#undef isspace
#undef isupper
#undef isxdigit
@@ -1584,6 +1583,16 @@
#undef isdigit
#define isdigit(a) ((unsigned)((a) - '0') <= 9)
+/* This one is more efficient too! ~200 bytes */
+/* In POSIX/C locale (the only locale we care about: do we REALLY want
+ * to allow Unicode whitespace in, say, .conf files? nuts!)
+ * isspace is only these chars: "\t\n\v\f\r" and space.
+ * "\t\n\v\f\r" happen to have ASCII codes 9,10,11,12,13.
+ * Use that.
+ */
+#undef isspace
+#define isspace(a) ({ unsigned char bb__isspace = (a) - 9; bb__isspace == (' ' - 9) || bb__isspace <= (13 - 9); })
+
#define ARRAY_SIZE(x) ((unsigned)(sizeof(x) / sizeof((x)[0])))