From ec497df1a0f9af53b07fbe23667ff6dd831c3cfd Mon Sep 17 00:00:00 2001
From: Wayne Davison <wayned@samba.org>
Date: Fri, 30 Dec 2005 07:19:16 +0000
Subject: [PATCH] Optimized set_compression() to remove the per-file strdup(),
 strlower(), and free() calls (it now uses iwildmatch()).

---
 token.c | 58 +++++++++++++++++++++++++++++++++------------------------
 1 file changed, 34 insertions(+), 24 deletions(-)

diff --git a/token.c b/token.c
index 8ce73ba7..e504b46d 100644
--- a/token.c
+++ b/token.c
@@ -24,48 +24,58 @@ extern int do_compression;
 extern int module_id;
 extern int def_compress_level;
 
-static int compression_level;
+static int compression_level, per_file_default_level;
 
 /* determine the compression level based on a wildcard filename list */
 void set_compression(char *fname)
 {
-	char *dont;
-	char *tok;
+	static char *match_list;
+	char *s;
 
 	if (!do_compression)
 		return;
 
-	compression_level = def_compress_level;
-	dont = lp_dont_compress(module_id);
-
-	if (!dont || !*dont)
-		return;
-
-	if (dont[0] == '*' && !dont[1]) {
-		/* an optimization to skip the rest of this routine */
-		compression_level = 0;
-		return;
+	if (!match_list) {
+		char *t, *f = lp_dont_compress(module_id);
+		int len = strlen(f);
+		if (!(match_list = t = new_array(char, len + 2)))
+			out_of_memory("set_compression");
+		while (*f) {
+			if (*f == ' ') {
+				f++;
+				continue;
+			}
+			do {
+				if (isupper(*(unsigned char *)f))
+					*t++ = tolower(*(unsigned char *)f);
+				else
+					*t++ = *f;
+			} while (*++f != ' ' && *f);
+			*t++ = '\0';
+		}
+		/* Optimize a match-string of "*". */
+		if (t - match_list == 2 && match_list[0] == '*') {
+			t = match_list;
+			per_file_default_level = 0;
+		} else
+			per_file_default_level = def_compress_level;
+		*t++ = '\0';
 	}
 
-	if ((tok = strrchr(fname, '/')) != NULL)
-		fname = tok + 1;
+	compression_level = per_file_default_level;
 
-	dont = strdup(dont);
-	fname = strdup(fname);
-	if (!dont || !fname)
+	if (!*match_list)
 		return;
 
-	strlower(dont);
-	strlower(fname);
+	if ((s = strrchr(fname, '/')) != NULL)
+		fname = s + 1;
 
-	for (tok = strtok(dont, " "); tok; tok = strtok(NULL, " ")) {
-		if (wildmatch(tok, fname)) {
+	for (s = match_list; *s; s += strlen(s) + 1) {
+		if (iwildmatch(s, fname)) {
 			compression_level = 0;
 			break;
 		}
 	}
-	free(dont);
-	free(fname);
 }
 
 /* non-compressing recv token */
-- 
2.34.1