[PATCH 1/6] nextchar(): get rid of special[]

We want to hit the slow path on '\t', '\n', '\\' and '\r'.  Doing that
as series of checks is painful, but we don't need to be that precise -
we almost never see control symbols outside of that set and the slow
path will handle them just fine.  And checking if character belongs to
[\0-\017\\] is easy enough without bothering with storing the set as
an array.

Signed-off-by: Al Viro <[email protected]>
---
 tokenize.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/tokenize.c b/tokenize.c
index 85bc3f49..c3c6c234 100644
--- a/tokenize.c
+++ b/tokenize.c
@@ -441,10 +441,7 @@ static inline int nextchar(stream_t *stream)
 
 	if (offset < stream->size) {
 		int c = stream->buffer[offset++];
-		static const char special[256] = {
-			['\t'] = 1, ['\r'] = 1, ['\n'] = 1, ['\\'] = 1
-		};
-		if (!special[c]) {
+		if (c >= ' ' && c != '\\') {
 			stream->offset = offset;
 			stream->pos++;
 			return c;
-- 
2.47.3