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-rw-r--r--include/libbb.h11
1 files changed, 10 insertions, 1 deletions
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 @@ extern const char bb_default_login_shell[];
#undef islower
#undef isprint
#undef ispunct
-#undef isspace
#undef isupper
#undef isxdigit
@@ -1584,6 +1583,16 @@ extern const char bb_default_login_shell[];
#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])))