exclude: split pathname matching code into a separate function

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/dir.c b/dir.c
index 22d0b7b726b1cd2ad757c6a9fe7b3295c1d52878..32d1c90e58d6117be2bd7d7bff443ad9993400ee 100644 (file)
--- a/dir.c
+++ b/dir.c
@@ -522,6 +522,53 @@ static int match_basename(const char *basename, int basenamelen,
        return 0;
 }
 
+static int match_pathname(const char *pathname, int pathlen,
+                         const char *base, int baselen,
+                         const char *pattern, int prefix, int patternlen,
+                         int flags)
+{
+       const char *name;
+       int namelen;
+
+       /*
+        * match with FNM_PATHNAME; the pattern has base implicitly
+        * in front of it.
+        */
+       if (*pattern == '/') {
+               pattern++;
+               prefix--;
+       }
+
+       /*
+        * baselen does not count the trailing slash. base[] may or
+        * may not end with a trailing slash though.
+        */
+       if (pathlen < baselen + 1 ||
+           (baselen && pathname[baselen] != '/') ||
+           strncmp_icase(pathname, base, baselen))
+               return 0;
+
+       namelen = baselen ? pathlen - baselen - 1 : pathlen;
+       name = pathname + pathlen - namelen;
+
+       if (prefix) {
+               /*
+                * if the non-wildcard part is longer than the
+                * remaining pathname, surely it cannot match.
+                */
+               if (prefix > namelen)
+                       return 0;
+
+               if (strncmp_icase(pattern, name, prefix))
+                       return 0;
+               pattern += prefix;
+               name    += prefix;
+               namelen -= prefix;
+       }
+
+       return fnmatch_icase(pattern, name, FNM_PATHNAME) == 0;
+}
+
 /* Scan the list and let the last match determine the fate.
  * Return 1 for exclude, 0 for include and -1 for undecided.
  */
@@ -536,9 +583,9 @@ int excluded_from_list(const char *pathname,
 
        for (i = el->nr - 1; 0 <= i; i--) {
                struct exclude *x = el->excludes[i];
-               const char *name, *exclude = x->pattern;
+               const char *exclude = x->pattern;
                int to_exclude = x->to_exclude;
-               int namelen, prefix = x->nowildcardlen;
+               int prefix = x->nowildcardlen;
 
                if (x->flags & EXC_FLAG_MUSTBEDIR) {
                        if (*dtype == DT_UNKNOWN)
@@ -556,36 +603,10 @@ int excluded_from_list(const char *pathname,
                        continue;
                }
 
-               /* match with FNM_PATHNAME:
-                * exclude has base (baselen long) implicitly in front of it.
-                */
-               if (*exclude == '/') {
-                       exclude++;
-                       prefix--;
-               }
-
-               if (pathlen < x->baselen ||
-                   (x->baselen && pathname[x->baselen-1] != '/') ||
-                   strncmp_icase(pathname, x->base, x->baselen))
-                       continue;
-
-               namelen = x->baselen ? pathlen - x->baselen : pathlen;
-               name = pathname + pathlen  - namelen;
-
-               /* if the non-wildcard part is longer than the
-                  remaining pathname, surely it cannot match */
-               if (prefix > namelen)
-                       continue;
-
-               if (prefix) {
-                       if (strncmp_icase(exclude, name, prefix))
-                               continue;
-                       exclude += prefix;
-                       name    += prefix;
-                       namelen -= prefix;
-               }
-
-               if (!fnmatch_icase(exclude, name, FNM_PATHNAME))
+               assert(x->baselen == 0 || x->base[x->baselen - 1] == '/');
+               if (match_pathname(pathname, pathlen,
+                                  x->base, x->baselen ? x->baselen - 1 : 0,
+                                  exclude, prefix, x->patternlen, x->flags))
                        return to_exclude;
        }
        return -1; /* undecided */