Merge branch 'jc/directory-attrs-regression-fix' into maint-1.8.1

A pattern "dir" (without trailing slash) in the attributes file
stopped matching a directory "dir" by mistake with an earlier change
that wanted to allow pattern "dir/" to also match.

* jc/directory-attrs-regression-fix:
  t: check that a pattern without trailing slash matches a directory
  dir.c::match_pathname(): pay attention to the length of string parameters
  dir.c::match_pathname(): adjust patternlen when shifting pattern
  dir.c::match_basename(): pay attention to the length of string parameters
  attr.c::path_matches(): special case paths that end with a slash
  attr.c::path_matches(): the basename is part of the pathname

1 files changed, 49 insertions, 5 deletions

diff --git a/dir.c b/dir.c
index a473ca23fb..6fdd3b2716 100644
--- a/dir.c
+++ b/dir.c
@@ -34,6 +34,33 @@ int fnmatch_icase(const char *pattern, const char *string, int flags)
 	return fnmatch(pattern, string, flags | (ignore_case ? FNM_CASEFOLD : 0));
 }
 
+static int fnmatch_icase_mem(const char *pattern, int patternlen,
+			     const char *string, int stringlen,
+			     int flags)
+{
+	int match_status;
+	struct strbuf pat_buf = STRBUF_INIT;
+	struct strbuf str_buf = STRBUF_INIT;
+	const char *use_pat = pattern;
+	const char *use_str = string;
+
+	if (pattern[patternlen]) {
+		strbuf_add(&pat_buf, pattern, patternlen);
+		use_pat = pat_buf.buf;
+	}
+	if (string[stringlen]) {
+		strbuf_add(&str_buf, string, stringlen);
+		use_str = str_buf.buf;
+	}
+
+	match_status = fnmatch_icase(use_pat, use_str, flags);
+
+	strbuf_release(&pat_buf);
+	strbuf_release(&str_buf);
+
+	return match_status;
+}
+
 static size_t common_prefix_len(const char **pathspec)
 {
 	const char *n, *first;
@@ -537,15 +564,20 @@ int match_basename(const char *basename, int basenamelen,
 		   int flags)
 {
 	if (prefix == patternlen) {
-		if (!strcmp_icase(pattern, basename))
+		if (patternlen == basenamelen &&
+		    !strncmp_icase(pattern, basename, basenamelen))
 			return 1;
 	} else if (flags & EXC_FLAG_ENDSWITH) {
+		/* "*literal" matching against "fooliteral" */
 		if (patternlen - 1 <= basenamelen &&
-		    !strcmp_icase(pattern + 1,
-				  basename + basenamelen - patternlen + 1))
+		    !strncmp_icase(pattern + 1,
+				   basename + basenamelen - (patternlen - 1),
+				   patternlen - 1))
 			return 1;
 	} else {
-		if (fnmatch_icase(pattern, basename, 0) == 0)
+		if (fnmatch_icase_mem(pattern, patternlen,
+				      basename, basenamelen,
+				      0) == 0)
 			return 1;
 	}
 	return 0;
@@ -565,6 +597,7 @@ int match_pathname(const char *pathname, int pathlen,
 	 */
 	if (*pattern == '/') {
 		pattern++;
+		patternlen--;
 		prefix--;
 	}
 
@@ -591,11 +624,22 @@ int match_pathname(const char *pathname, int pathlen,
 		if (strncmp_icase(pattern, name, prefix))
 			return 0;
 		pattern += prefix;
+		patternlen -= prefix;
 		name    += prefix;
 		namelen -= prefix;
+
+		/*
+		 * If the whole pattern did not have a wildcard,
+		 * then our prefix match is all we need; we
+		 * do not need to call fnmatch at all.
+		 */
+		if (!patternlen && !namelen)
+			return 1;
 	}
 
-	return fnmatch_icase(pattern, name, FNM_PATHNAME) == 0;
+	return fnmatch_icase_mem(pattern, patternlen,
+				 name, namelen,
+				 FNM_PATHNAME) == 0;
 }
 
 /* Scan the list and let the last match determine the fate.