[PATCH 09/10] vcs-svn: simplifications for repo_modify_path et al

[Jonathan Nieder <jrnieder@gmail.com>]

Restrict repo_modify_path API to functions that are actually
needed.  That is:

 - decouple reading the mode and content of dirents from
   other operations
 - remove repo_modify_path.  It was only used to read the
   mode from dirents.
 - remove the ability to use repo_read_mode on a missing
   path.  The existing code only errored out in that case,
   anyway.

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
---
 vcs-svn/repo_tree.c |   25 +++++++++----------------
 vcs-svn/repo_tree.h |    4 ++--
 vcs-svn/svndump.c   |    4 +---
 3 files changed, 12 insertions(+), 21 deletions(-)

diff --git a/vcs-svn/repo_tree.c b/vcs-svn/repo_tree.c
index a4d8340..4d98185 100644
--- a/vcs-svn/repo_tree.c
+++ b/vcs-svn/repo_tree.c
@@ -166,7 +166,15 @@ uint32_t repo_read_path(uint32_t *path)
 	return content_offset;
 }
 
-uint32_t repo_copy(uint32_t revision, uint32_t *src, uint32_t *dst)
+uint32_t repo_read_mode(const uint32_t *path)
+{
+	struct repo_dirent *dent = repo_read_dirent(active_commit, path);
+	if (dent == NULL)
+		die("invalid dump: path to be modified is missing");
+	return dent->mode;
+}
+
+void repo_copy(uint32_t revision, uint32_t *src, uint32_t *dst)
 {
 	uint32_t mode = 0, content_offset = 0;
 	struct repo_dirent *src_dent;
@@ -176,7 +184,6 @@ uint32_t repo_copy(uint32_t revision, uint32_t *src, uint32_t *dst)
 		content_offset = src_dent->content_offset;
 		repo_write_dirent(dst, mode, content_offset, 0);
 	}
-	return mode;
 }
 
 void repo_add(uint32_t *path, uint32_t mode, uint32_t blob_mark)
@@ -184,20 +191,6 @@ void repo_add(uint32_t *path, uint32_t mode, uint32_t blob_mark)
 	repo_write_dirent(path, mode, blob_mark, 0);
 }
 
-uint32_t repo_modify_path(uint32_t *path, uint32_t mode, uint32_t blob_mark)
-{
-	struct repo_dirent *src_dent;
-	src_dent = repo_read_dirent(active_commit, path);
-	if (!src_dent)
-		return 0;
-	if (!blob_mark)
-		blob_mark = src_dent->content_offset;
-	if (!mode)
-		mode = src_dent->mode;
-	repo_write_dirent(path, mode, blob_mark, 0);
-	return mode;
-}
-
 void repo_delete(uint32_t *path)
 {
 	repo_write_dirent(path, 0, 0, 1);
diff --git a/vcs-svn/repo_tree.h b/vcs-svn/repo_tree.h
index 7070839..0499a19 100644
--- a/vcs-svn/repo_tree.h
+++ b/vcs-svn/repo_tree.h
@@ -12,10 +12,10 @@
 #define REPO_MAX_PATH_DEPTH 1000
 
 uint32_t next_blob_mark(void);
-uint32_t repo_copy(uint32_t revision, uint32_t *src, uint32_t *dst);
+void repo_copy(uint32_t revision, uint32_t *src, uint32_t *dst);
 void repo_add(uint32_t *path, uint32_t mode, uint32_t blob_mark);
-uint32_t repo_modify_path(uint32_t *path, uint32_t mode, uint32_t blob_mark);
 uint32_t repo_read_path(uint32_t *path);
+uint32_t repo_read_mode(const uint32_t *path);
 void repo_delete(uint32_t *path);
 void repo_commit(uint32_t revision, uint32_t author, char *log, uint32_t uuid,
 		 uint32_t url, long unsigned timestamp);
diff --git a/vcs-svn/svndump.c b/vcs-svn/svndump.c
index 649a468..31c6056 100644
--- a/vcs-svn/svndump.c
+++ b/vcs-svn/svndump.c
@@ -236,9 +236,7 @@ static void handle_node(void)
 		old_mark = repo_read_path(node_ctx.dst);
 		if (!have_text)
 			mark = old_mark;
-		mode = repo_modify_path(node_ctx.dst, 0, 0);
-		if (!mode)
-			die("invalid dump: path to be modified is missing");
+		mode = repo_read_mode(node_ctx.dst);
 		if (mode == REPO_MODE_DIR && type != REPO_MODE_DIR)
 			die("invalid dump: cannot modify a directory into a file");
 		if (mode != REPO_MODE_DIR && type == REPO_MODE_DIR)
-- 
1.7.2.4