notes: implement 'git notes copy --stdin'
[gitweb.git] / symlinks.c
index 8dcd63261fff56e54c233224c6014b146d9bbeb3..88601200114f857a57214a9bf0d02ffd39a83504 100644 (file)
@@ -32,19 +32,13 @@ static int longest_path_match(const char *name_a, int len_a,
        return match_len;
 }
 
-static struct cache_def {
-       char path[PATH_MAX + 1];
-       int len;
-       int flags;
-       int track_flags;
-       int prefix_len_stat_func;
-} cache;
+static struct cache_def default_cache;
 
-static inline void reset_lstat_cache(void)
+static inline void reset_lstat_cache(struct cache_def *cache)
 {
-       cache.path[0] = '\0';
-       cache.len = 0;
-       cache.flags = 0;
+       cache->path[0] = '\0';
+       cache->len = 0;
+       cache->flags = 0;
        /*
         * The track_flags and prefix_len_stat_func members is only
         * set by the safeguard rule inside lstat_cache()
@@ -70,23 +64,23 @@ static inline void reset_lstat_cache(void)
  * of the prefix, where the cache should use the stat() function
  * instead of the lstat() function to test each path component.
  */
-static int lstat_cache(const char *name, int len,
+static int lstat_cache(struct cache_def *cache, const char *name, int len,
                       int track_flags, int prefix_len_stat_func)
 {
        int match_len, last_slash, last_slash_dir, previous_slash;
        int match_flags, ret_flags, save_flags, max_len, ret;
        struct stat st;
 
-       if (cache.track_flags != track_flags ||
-           cache.prefix_len_stat_func != prefix_len_stat_func) {
+       if (cache->track_flags != track_flags ||
+           cache->prefix_len_stat_func != prefix_len_stat_func) {
                /*
                 * As a safeguard rule we clear the cache if the
                 * values of track_flags and/or prefix_len_stat_func
                 * does not match with the last supplied values.
                 */
-               reset_lstat_cache();
-               cache.track_flags = track_flags;
-               cache.prefix_len_stat_func = prefix_len_stat_func;
+               reset_lstat_cache(cache);
+               cache->track_flags = track_flags;
+               cache->prefix_len_stat_func = prefix_len_stat_func;
                match_len = last_slash = 0;
        } else {
                /*
@@ -94,10 +88,14 @@ static int lstat_cache(const char *name, int len,
                 * the 2 "excluding" path types.
                 */
                match_len = last_slash =
-                       longest_path_match(name, len, cache.path, cache.len,
+                       longest_path_match(name, len, cache->path, cache->len,
                                           &previous_slash);
-               match_flags = cache.flags & track_flags & (FL_NOENT|FL_SYMLINK);
-               if (match_flags && match_len == cache.len)
+               match_flags = cache->flags & track_flags & (FL_NOENT|FL_SYMLINK);
+
+               if (!(track_flags & FL_FULLPATH) && match_len == len)
+                       match_len = last_slash = previous_slash;
+
+               if (match_flags && match_len == cache->len)
                        return match_flags;
                /*
                 * If we now have match_len > 0, we would know that
@@ -121,18 +119,18 @@ static int lstat_cache(const char *name, int len,
        max_len = len < PATH_MAX ? len : PATH_MAX;
        while (match_len < max_len) {
                do {
-                       cache.path[match_len] = name[match_len];
+                       cache->path[match_len] = name[match_len];
                        match_len++;
                } while (match_len < max_len && name[match_len] != '/');
                if (match_len >= max_len && !(track_flags & FL_FULLPATH))
                        break;
                last_slash = match_len;
-               cache.path[last_slash] = '\0';
+               cache->path[last_slash] = '\0';
 
                if (last_slash <= prefix_len_stat_func)
-                       ret = stat(cache.path, &st);
+                       ret = stat(cache->path, &st);
                else
-                       ret = lstat(cache.path, &st);
+                       ret = lstat(cache->path, &st);
 
                if (ret) {
                        ret_flags = FL_LSTATERR;
@@ -156,9 +154,9 @@ static int lstat_cache(const char *name, int len,
         */
        save_flags = ret_flags & track_flags & (FL_NOENT|FL_SYMLINK);
        if (save_flags && last_slash > 0 && last_slash <= PATH_MAX) {
-               cache.path[last_slash] = '\0';
-               cache.len = last_slash;
-               cache.flags = save_flags;
+               cache->path[last_slash] = '\0';
+               cache->len = last_slash;
+               cache->flags = save_flags;
        } else if ((track_flags & FL_DIR) &&
                   last_slash_dir > 0 && last_slash_dir <= PATH_MAX) {
                /*
@@ -172,54 +170,31 @@ static int lstat_cache(const char *name, int len,
                 * can still cache the path components before the last
                 * one (the found symlink or non-existing component).
                 */
-               cache.path[last_slash_dir] = '\0';
-               cache.len = last_slash_dir;
-               cache.flags = FL_DIR;
+               cache->path[last_slash_dir] = '\0';
+               cache->len = last_slash_dir;
+               cache->flags = FL_DIR;
        } else {
-               reset_lstat_cache();
+               reset_lstat_cache(cache);
        }
        return ret_flags;
 }
 
-/*
- * Invalidate the given 'name' from the cache, if 'name' matches
- * completely with the cache.
- */
-void invalidate_lstat_cache(const char *name, int len)
-{
-       int match_len, previous_slash;
-
-       match_len = longest_path_match(name, len, cache.path, cache.len,
-                                      &previous_slash);
-       if (len == match_len) {
-               if ((cache.track_flags & FL_DIR) && previous_slash > 0) {
-                       cache.path[previous_slash] = '\0';
-                       cache.len = previous_slash;
-                       cache.flags = FL_DIR;
-               } else {
-                       reset_lstat_cache();
-               }
-       }
-}
+#define USE_ONLY_LSTAT  0
 
 /*
- * Completely clear the contents of the cache
+ * Return non-zero if path 'name' has a leading symlink component
  */
-void clear_lstat_cache(void)
+int threaded_has_symlink_leading_path(struct cache_def *cache, const char *name, int len)
 {
-       reset_lstat_cache();
+       return lstat_cache(cache, name, len, FL_SYMLINK|FL_DIR, USE_ONLY_LSTAT) & FL_SYMLINK;
 }
 
-#define USE_ONLY_LSTAT  0
-
 /*
  * Return non-zero if path 'name' has a leading symlink component
  */
 int has_symlink_leading_path(const char *name, int len)
 {
-       return lstat_cache(name, len,
-                          FL_SYMLINK|FL_DIR, USE_ONLY_LSTAT) &
-               FL_SYMLINK;
+       return threaded_has_symlink_leading_path(&default_cache, name, len);
 }
 
 /*
@@ -228,7 +203,8 @@ int has_symlink_leading_path(const char *name, int len)
  */
 int has_symlink_or_noent_leading_path(const char *name, int len)
 {
-       return lstat_cache(name, len,
+       struct cache_def *cache = &default_cache;       /* FIXME */
+       return lstat_cache(cache, name, len,
                           FL_SYMLINK|FL_NOENT|FL_DIR, USE_ONLY_LSTAT) &
                (FL_SYMLINK|FL_NOENT);
 }
@@ -242,7 +218,8 @@ int has_symlink_or_noent_leading_path(const char *name, int len)
  */
 int has_dirs_only_path(const char *name, int len, int prefix_len)
 {
-       return lstat_cache(name, len,
+       struct cache_def *cache = &default_cache;       /* FIXME */
+       return lstat_cache(cache, name, len,
                           FL_DIR|FL_FULLPATH, prefix_len) &
                FL_DIR;
 }