[PATCH v4 2/4] cache-tree: replace "for" loops in update_one with "while" loops

[Nguyễn Thái Ngọc Duy]

The loops in update_one can be increased in two different ways: step
by one for files and by <n> for directories. "for" loop is not
suitable for this as it always steps by one and special handling is
required for directories. Replace them with "while" loops for clarity.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclo...@gmail.com>
---
 cache-tree.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/cache-tree.c b/cache-tree.c
index e2beab5..44eed28 100644
--- a/cache-tree.c
+++ b/cache-tree.c
@@ -259,7 +259,8 @@ static int update_one(struct cache_tree *it,
        /*
         * Find the subtrees and update them.
         */
-       for (i = 0; i < entries; i++) {
+       i = 0;
+       while (i < entries) {
                struct cache_entry *ce = cache[i];
                struct cache_tree_sub *sub;
                const char *path, *slash;
@@ -271,8 +272,10 @@ static int update_one(struct cache_tree *it,
                        break; /* at the end of this level */
 
                slash = strchr(path + baselen, '/');
-               if (!slash)
+               if (!slash) {
+                       i++;
                        continue;
+               }
                /*
                 * a/bbb/c (base = a/, slash = /c)
                 * ==>
@@ -289,7 +292,7 @@ static int update_one(struct cache_tree *it,
                                    flags);
                if (subcnt < 0)
                        return subcnt;
-               i += subcnt - 1;
+               i += subcnt;
                sub->used = 1;
        }
 
@@ -300,7 +303,8 @@ static int update_one(struct cache_tree *it,
         */
        strbuf_init(&buffer, 8192);
 
-       for (i = 0; i < entries; i++) {
+       i = 0;
+       while (i < entries) {
                struct cache_entry *ce = cache[i];
                struct cache_tree_sub *sub;
                const char *path, *slash;
@@ -320,7 +324,7 @@ static int update_one(struct cache_tree *it,
                        if (!sub)
                                die("cache-tree.c: '%.*s' in '%s' not found",
                                    entlen, path + baselen, path);
-                       i += sub->cache_tree->entry_count - 1;
+                       i += sub->cache_tree->entry_count;
                        sha1 = sub->cache_tree->sha1;
                        mode = S_IFDIR;
                }
@@ -328,6 +332,7 @@ static int update_one(struct cache_tree *it,
                        sha1 = ce->sha1;
                        mode = ce->ce_mode;
                        entlen = pathlen - baselen;
+                       i++;
                }
                if (mode != S_IFGITLINK && !missing_ok && !has_sha1_file(sha1)) 
{
                        strbuf_release(&buffer);
-- 
1.8.0.rc2.23.g1fb49df

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