checkout_entry(): use the strbuf throughout the function

There is no need to break out the "buf" and "len" members into
separate temporary variables.  Rename path_buf to path and use
path.buf and path.len directly.  This makes it easier to reason about
the data flow in the function.

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/entry.c b/entry.c
index fbb4863103417a408f11f9b5141b833915b2b211..20d291918f540e411916a86f56826946afacb10b 100644 (file)
--- a/entry.c
+++ b/entry.c
@@ -237,27 +237,25 @@ static int check_path(const char *path, int len, struct stat *st, int skiplen)
 int checkout_entry(struct cache_entry *ce,
                   const struct checkout *state, char *topath)
 {
-       static struct strbuf path_buf = STRBUF_INIT;
-       char *path;
+       static struct strbuf path = STRBUF_INIT;
        struct stat st;
-       int len;
 
        if (topath)
                return write_entry(ce, topath, state, 1);
 
-       strbuf_reset(&path_buf);
-       strbuf_add(&path_buf, state->base_dir, state->base_dir_len);
-       strbuf_add(&path_buf, ce->name, ce_namelen(ce));
-       path = path_buf.buf;
-       len = path_buf.len;
+       strbuf_reset(&path);
+       strbuf_add(&path, state->base_dir, state->base_dir_len);
+       strbuf_add(&path, ce->name, ce_namelen(ce));
 
-       if (!check_path(path, len, &st, state->base_dir_len)) {
+       if (!check_path(path.buf, path.len, &st, state->base_dir_len)) {
                unsigned changed = ce_match_stat(ce, &st, CE_MATCH_IGNORE_VALID|CE_MATCH_IGNORE_SKIP_WORKTREE);
                if (!changed)
                        return 0;
                if (!state->force) {
                        if (!state->quiet)
-                               fprintf(stderr, "%s already exists, no checkout\n", path);
+                               fprintf(stderr,
+                                       "%s already exists, no checkout\n",
+                                       path.buf);
                        return -1;
                }
 
@@ -272,12 +270,14 @@ int checkout_entry(struct cache_entry *ce,
                        if (S_ISGITLINK(ce->ce_mode))
                                return 0;
                        if (!state->force)
-                               return error("%s is a directory", path);
-                       remove_subtree(path);
-               } else if (unlink(path))
-                       return error("unable to unlink old '%s' (%s)", path, strerror(errno));
+                               return error("%s is a directory", path.buf);
+                       remove_subtree(path.buf);
+               } else if (unlink(path.buf))
+                       return error("unable to unlink old '%s' (%s)",
+                                    path.buf, strerror(errno));
        } else if (state->not_new)
                return 0;
-       create_directories(path, len, state);
-       return write_entry(ce, path, state, 0);
+
+       create_directories(path.buf, path.len, state);
+       return write_entry(ce, path.buf, state, 0);
 }