ce_smudge_racily_clean_entry: explain why it works.

diff --git a/tree.c b/tree.c
index 8b42a07b208aceeaa4900c034eea8a5b6b7ac323..e7a7b7190c08dac383560dc9b0bc650eb531207a 100644 (file)
--- a/tree.c
+++ b/tree.c
@@ -9,9 +9,16 @@ const char *tree_type = "tree";
 
 static int read_one_entry(unsigned char *sha1, const char *base, int baselen, const char *pathname, unsigned mode, int stage)
 {
-       int len = strlen(pathname);
-       unsigned int size = cache_entry_size(baselen + len);
-       struct cache_entry *ce = xmalloc(size);
+       int len;
+       unsigned int size;
+       struct cache_entry *ce;
+
+       if (S_ISDIR(mode))
+               return READ_TREE_RECURSIVE;
+
+       len = strlen(pathname);
+       size = cache_entry_size(baselen + len);
+       ce = xmalloc(size);
 
        memset(ce, 0, size);
 
@@ -67,9 +74,10 @@ static int match_tree_entry(const char *base, int baselen, const char *path, uns
        return 0;
 }
 
-static int read_tree_recursive(void *buffer, unsigned long size,
-                              const char *base, int baselen,
-                              int stage, const char **match)
+int read_tree_recursive(void *buffer, unsigned long size,
+                       const char *base, int baselen,
+                       int stage, const char **match,
+                       read_tree_fn_t fn)
 {
        while (size) {
                int len = strlen(buffer)+1;
@@ -86,6 +94,14 @@ static int read_tree_recursive(void *buffer, unsigned long size,
                if (!match_tree_entry(base, baselen, path, mode, match))
                        continue;
 
+               switch (fn(sha1, base, baselen, path, mode, stage)) {
+               case 0:
+                       continue;
+               case READ_TREE_RECURSIVE:
+                       break;;
+               default:
+                       return -1;
+               }
                if (S_ISDIR(mode)) {
                        int retval;
                        int pathlen = strlen(path);
@@ -106,22 +122,20 @@ static int read_tree_recursive(void *buffer, unsigned long size,
                        retval = read_tree_recursive(eltbuf, eltsize,
                                                     newbase,
                                                     baselen + pathlen + 1,
-                                                    stage, match);
+                                                    stage, match, fn);
                        free(eltbuf);
                        free(newbase);
                        if (retval)
                                return -1;
                        continue;
                }
-               if (read_one_entry(sha1, base, baselen, path, mode, stage) < 0)
-                       return -1;
        }
        return 0;
 }
 
 int read_tree(void *buffer, unsigned long size, int stage, const char **match)
 {
-       return read_tree_recursive(buffer, size, "", 0, stage, match);
+       return read_tree_recursive(buffer, size, "", 0, stage, match, read_one_entry);
 }
 
 struct tree *lookup_tree(const unsigned char *sha1)
@@ -186,7 +200,6 @@ int parse_tree_buffer(struct tree *item, void *buffer, unsigned long size)
                }
                if (obj)
                        n_refs++;
-               entry->parent = NULL; /* needs to be filled by the user */
                *list_p = entry;
                list_p = &entry->next;
        }