[PATCH 2/3] wildmatch: support "no FNM_PATHNAME" mode

["Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>]

By default wildmatch(,, 0) is equivalent with fnmatch(,, FNM_PATHNAME).

This patch makes wildmatch behave more like fnmatch: FNM_PATHNAME
behavior is always applied when FNM_PATHNAME is passed to
wildmatch. Without FNM_PATHNAME, wildmatch accepts '/' in '?' and '[]'
and treats '*' like '**' in the original version.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 The choice of name "pathspec" is not good. I couldn't think of
 anything appropriate and just did not care enough at this point.

 dir.c                |  2 +-
 t/t3070-wildmatch.sh | 27 +++++++++++++++++++++++++++
 test-wildmatch.c     |  4 +++-
 wildmatch.c          | 12 ++++++++----
 4 files changed, 39 insertions(+), 6 deletions(-)

diff --git a/dir.c b/dir.c
index cb7328b..7bbd6f8 100644
--- a/dir.c
+++ b/dir.c
@@ -595,7 +595,7 @@ int match_pathname(const char *pathname, int pathlen,
 	}
 
 	return wildmatch(pattern, name,
-			 ignore_case ? FNM_CASEFOLD : 0) == 0;
+			 FNM_PATHNAME | (ignore_case ? FNM_CASEFOLD : 0)) == 0;
 }
 
 /* Scan the list and let the last match determine the fate.
diff --git a/t/t3070-wildmatch.sh b/t/t3070-wildmatch.sh
index 3155eab..ca4ac46 100755
--- a/t/t3070-wildmatch.sh
+++ b/t/t3070-wildmatch.sh
@@ -29,6 +29,18 @@ match() {
     fi
 }
 
+pathspec() {
+    if [ $1 = 1 ]; then
+	test_expect_success "pathspec:    match '$2' '$3'" "
+	    test-wildmatch pathspec '$2' '$3'
+	"
+    else
+	test_expect_success "pathspec: no match '$2' '$3'" "
+	    ! test-wildmatch pathspec '$2' '$3'
+	"
+    fi
+}
+
 # Basic wildmat features
 match 1 1 foo foo
 match 0 0 foo bar
@@ -192,4 +204,19 @@ match 0 0 'XXX/adobe/courier/bold/o/normal//12/120/75/75/X/70/iso8859/1' 'XXX/*/
 match 1 0 'abcd/abcdefg/abcdefghijk/abcdefghijklmnop.txt' '**/*a*b*g*n*t'
 match 0 0 'abcd/abcdefg/abcdefghijk/abcdefghijklmnop.txtz' '**/*a*b*g*n*t'
 
+pathspec 1 foo foo
+pathspec 0 foo fo
+pathspec 1 foo/bar foo/bar
+pathspec 1 foo/bar 'foo/*'
+pathspec 1 foo/bba/arr 'foo/*'
+pathspec 1 foo/bba/arr 'foo/**'
+pathspec 1 foo/bba/arr 'foo*'
+pathspec 1 foo/bba/arr 'foo**'
+pathspec 1 foo/bba/arr 'foo/*arr'
+pathspec 1 foo/bba/arr 'foo/**arr'
+pathspec 0 foo/bba/arr 'foo/*z'
+pathspec 0 foo/bba/arr 'foo/**z'
+pathspec 1 foo/bar 'foo?bar'
+pathspec 1 foo/bar 'foo[/]bar'
+
 test_done
diff --git a/test-wildmatch.c b/test-wildmatch.c
index e384c8e..7fefa4f 100644
--- a/test-wildmatch.c
+++ b/test-wildmatch.c
@@ -12,9 +12,11 @@ int main(int argc, char **argv)
 			argv[i] += 3;
 	}
 	if (!strcmp(argv[1], "wildmatch"))
+		return !!wildmatch(argv[3], argv[2], FNM_PATHNAME);
+	else if (!strcmp(argv[1], "pathspec"))
 		return !!wildmatch(argv[3], argv[2], 0);
 	else if (!strcmp(argv[1], "iwildmatch"))
-		return !!wildmatch(argv[3], argv[2], FNM_CASEFOLD);
+		return !!wildmatch(argv[3], argv[2], FNM_PATHNAME | FNM_CASEFOLD);
 	else if (!strcmp(argv[1], "fnmatch"))
 		return !!fnmatch(argv[3], argv[2], FNM_PATHNAME);
 	else
diff --git a/wildmatch.c b/wildmatch.c
index 9586ed9..6aa034f 100644
--- a/wildmatch.c
+++ b/wildmatch.c
@@ -80,14 +80,17 @@ static int dowild(const uchar *p, const uchar *text, int flags)
 			continue;
 		case '?':
 			/* Match anything but '/'. */
-			if (t_ch == '/')
+			if (flags & FNM_PATHNAME && t_ch == '/')
 				return NOMATCH;
 			continue;
 		case '*':
 			if (*++p == '*') {
 				const uchar *prev_p = p - 2;
 				while (*++p == '*') {}
-				if ((prev_p == text || *prev_p == '/') ||
+				if (!(flags & FNM_PATHNAME))
+					/* without FNM_PATHNAME, '*' == '**' */
+					special = TRUE;
+				else if ((prev_p == text || *prev_p == '/') ||
 				    (*p == '\0' || *p == '/' ||
 				     (p[0] == '\\' && p[1] == '/'))) {
 					/*
@@ -106,7 +109,7 @@ static int dowild(const uchar *p, const uchar *text, int flags)
 				} else
 					return ABORT_MALFORMED;
 			} else
-				special = FALSE;
+				special = flags & FNM_PATHNAME ? FALSE: TRUE;
 			if (*p == '\0') {
 				/* Trailing "**" matches everything.  Trailing "*" matches
 				 * only if there are no more slash characters. */
@@ -217,7 +220,8 @@ static int dowild(const uchar *p, const uchar *text, int flags)
 				} else if (t_ch == p_ch)
 					matched = TRUE;
 			} while (prev_ch = p_ch, (p_ch = *++p) != ']');
-			if (matched == special || t_ch == '/')
+			if (matched == special ||
+			    (flags & FNM_PATHNAME && t_ch == '/'))
 				return NOMATCH;
 			continue;
 		}
-- 
1.8.0.rc2.23.g1fb49df