Move tree_entry_interesting() to tree-walk.c and export it

[thirdparty/git.git] / tree-diff.c

diff --git a/tree-diff.c b/tree-diff.c
index 281b48c7c078cae0c92838ba015a4bfc46d1064b..23f4478cee5b3dd064529a35dc763cd74dcaa98c 100644 (file)
--- a/tree-diff.c
+++ b/tree-diff.c
@@ -82,118 +82,6 @@ static int compare_tree_entry(struct tree_desc *t1, struct tree_desc *t2, const
        return 0;
 }
 
-/*
- * Is a tree entry interesting given the pathspec we have?
- *
- * Pre-condition: baselen == 0 || base[baselen-1] == '/'
- *
- * Return:
- *  - 2 for "yes, and all subsequent entries will be"
- *  - 1 for yes
- *  - zero for no
- *  - negative for "no, and no subsequent entries will be either"
- */
-static int tree_entry_interesting(const struct name_entry *entry, const char *base, int baselen, const struct pathspec *ps)
-{
-       int i;
-       int pathlen;
-       int never_interesting = -1;
-
-       if (!ps || !ps->nr)
-               return 2;
-
-       pathlen = tree_entry_len(entry->path, entry->sha1);
-
-       for (i = 0; i < ps->nr; i++) {
-               const struct pathspec_item *item = ps->items+i;
-               const char *match = item->match;
-               int matchlen = item->len;
-               int m = -1; /* signals that we haven't called strncmp() */
-
-               if (baselen >= matchlen) {
-                       /* If it doesn't match, move along... */
-                       if (strncmp(base, match, matchlen))
-                               continue;
-
-                       /*
-                        * If the base is a subdirectory of a path which
-                        * was specified, all of them are interesting.
-                        */
-                       if (!matchlen ||
-                           base[matchlen] == '/' ||
-                           match[matchlen - 1] == '/')
-                               return 2;
-
-                       /* Just a random prefix match */
-                       continue;
-               }
-
-               /* Does the base match? */
-               if (strncmp(base, match, baselen))
-                       continue;
-
-               match += baselen;
-               matchlen -= baselen;
-
-               if (never_interesting) {
-                       /*
-                        * We have not seen any match that sorts later
-                        * than the current path.
-                        */
-
-                       /*
-                        * Does match sort strictly earlier than path
-                        * with their common parts?
-                        */
-                       m = strncmp(match, entry->path,
-                                   (matchlen < pathlen) ? matchlen : pathlen);
-                       if (m < 0)
-                               continue;
-
-                       /*
-                        * If we come here even once, that means there is at
-                        * least one pathspec that would sort equal to or
-                        * later than the path we are currently looking at.
-                        * In other words, if we have never reached this point
-                        * after iterating all pathspecs, it means all
-                        * pathspecs are either outside of base, or inside the
-                        * base but sorts strictly earlier than the current
-                        * one.  In either case, they will never match the
-                        * subsequent entries.  In such a case, we initialized
-                        * the variable to -1 and that is what will be
-                        * returned, allowing the caller to terminate early.
-                        */
-                       never_interesting = 0;
-               }
-
-               if (pathlen > matchlen)
-                       continue;
-
-               if (matchlen > pathlen) {
-                       if (match[pathlen] != '/')
-                               continue;
-                       if (!S_ISDIR(entry->mode))
-                               continue;
-               }
-
-               if (m == -1)
-                       /*
-                        * we cheated and did not do strncmp(), so we do
-                        * that here.
-                        */
-                       m = strncmp(match, entry->path, pathlen);
-
-               /*
-                * If common part matched earlier then it is a hit,
-                * because we rejected the case where path is not a
-                * leading directory and is shorter than match.
-                */
-               if (!m)
-                       return 1;
-       }
-       return never_interesting; /* No matches */
-}
-
 /* A whole sub-tree went away or appeared */
 static void show_tree(struct diff_options *opt, const char *prefix, struct tree_desc *desc, const char *base, int baselen)
 {