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-rw-r--r--vcs-svn/repo_tree.c328
1 files changed, 25 insertions, 303 deletions
diff --git a/vcs-svn/repo_tree.c b/vcs-svn/repo_tree.c
index a21d89d..1681b65 100644
--- a/vcs-svn/repo_tree.c
+++ b/vcs-svn/repo_tree.c
@@ -4,323 +4,45 @@
*/
#include "git-compat-util.h"
-
-#include "string_pool.h"
+#include "strbuf.h"
#include "repo_tree.h"
-#include "obj_pool.h"
#include "fast_export.h"
-#include "trp.h"
-
-struct repo_dirent {
- uint32_t name_offset;
- struct trp_node children;
- uint32_t mode;
- uint32_t content_offset;
-};
-
-struct repo_dir {
- struct trp_root entries;
-};
-
-struct repo_commit {
- uint32_t root_dir_offset;
-};
-
-/* Memory pools for commit, dir and dirent */
-obj_pool_gen(commit, struct repo_commit, 4096)
-obj_pool_gen(dir, struct repo_dir, 4096)
-obj_pool_gen(dent, struct repo_dirent, 4096)
-
-static uint32_t active_commit;
-static uint32_t mark;
-
-static int repo_dirent_name_cmp(const void *a, const void *b);
-
-/* Treap for directory entries */
-trp_gen(static, dent_, struct repo_dirent, children, dent, repo_dirent_name_cmp)
-
-uint32_t next_blob_mark(void)
-{
- return mark++;
-}
-
-static struct repo_dir *repo_commit_root_dir(struct repo_commit *commit)
-{
- return dir_pointer(commit->root_dir_offset);
-}
-
-static struct repo_dirent *repo_first_dirent(struct repo_dir *dir)
-{
- return dent_first(&dir->entries);
-}
-
-static int repo_dirent_name_cmp(const void *a, const void *b)
-{
- const struct repo_dirent *dent1 = a, *dent2 = b;
- uint32_t a_offset = dent1->name_offset;
- uint32_t b_offset = dent2->name_offset;
- return (a_offset > b_offset) - (a_offset < b_offset);
-}
-
-static int repo_dirent_is_dir(struct repo_dirent *dent)
+const char *repo_read_path(const uint32_t *path, uint32_t *mode_out)
{
- return dent != NULL && dent->mode == REPO_MODE_DIR;
-}
+ int err;
+ static struct strbuf buf = STRBUF_INIT;
-static struct repo_dir *repo_dir_from_dirent(struct repo_dirent *dent)
-{
- if (!repo_dirent_is_dir(dent))
+ strbuf_reset(&buf);
+ err = fast_export_ls(REPO_MAX_PATH_DEPTH, path, mode_out, &buf);
+ if (err) {
+ if (errno != ENOENT)
+ die_errno("BUG: unexpected fast_export_ls error");
+ /* Treat missing paths as directories. */
+ *mode_out = REPO_MODE_DIR;
return NULL;
- return dir_pointer(dent->content_offset);
-}
-
-static struct repo_dir *repo_clone_dir(struct repo_dir *orig_dir)
-{
- uint32_t orig_o, new_o;
- orig_o = dir_offset(orig_dir);
- if (orig_o >= dir_pool.committed)
- return orig_dir;
- new_o = dir_alloc(1);
- orig_dir = dir_pointer(orig_o);
- *dir_pointer(new_o) = *orig_dir;
- return dir_pointer(new_o);
-}
-
-static struct repo_dirent *repo_read_dirent(uint32_t revision,
- const uint32_t *path)
-{
- uint32_t name = 0;
- struct repo_dirent *key = dent_pointer(dent_alloc(1));
- struct repo_dir *dir = NULL;
- struct repo_dirent *dent = NULL;
- dir = repo_commit_root_dir(commit_pointer(revision));
- while (~(name = *path++)) {
- key->name_offset = name;
- dent = dent_search(&dir->entries, key);
- if (dent == NULL || !repo_dirent_is_dir(dent))
- break;
- dir = repo_dir_from_dirent(dent);
}
- dent_free(1);
- return dent;
-}
-
-static void repo_write_dirent(const uint32_t *path, uint32_t mode,
- uint32_t content_offset, uint32_t del)
-{
- uint32_t name, revision, dir_o = ~0, parent_dir_o = ~0;
- struct repo_dir *dir;
- struct repo_dirent *key;
- struct repo_dirent *dent = NULL;
- revision = active_commit;
- dir = repo_commit_root_dir(commit_pointer(revision));
- dir = repo_clone_dir(dir);
- commit_pointer(revision)->root_dir_offset = dir_offset(dir);
- while (~(name = *path++)) {
- parent_dir_o = dir_offset(dir);
-
- key = dent_pointer(dent_alloc(1));
- key->name_offset = name;
-
- dent = dent_search(&dir->entries, key);
- if (dent == NULL)
- dent = key;
- else
- dent_free(1);
-
- if (dent == key) {
- dent->mode = REPO_MODE_DIR;
- dent->content_offset = 0;
- dent = dent_insert(&dir->entries, dent);
- }
-
- if (dent_offset(dent) < dent_pool.committed) {
- dir_o = repo_dirent_is_dir(dent) ?
- dent->content_offset : ~0;
- dent_remove(&dir->entries, dent);
- dent = dent_pointer(dent_alloc(1));
- dent->name_offset = name;
- dent->mode = REPO_MODE_DIR;
- dent->content_offset = dir_o;
- dent = dent_insert(&dir->entries, dent);
- }
-
- dir = repo_dir_from_dirent(dent);
- dir = repo_clone_dir(dir);
- dent->content_offset = dir_offset(dir);
- }
- if (dent == NULL)
- return;
- dent->mode = mode;
- dent->content_offset = content_offset;
- if (del && ~parent_dir_o)
- dent_remove(&dir_pointer(parent_dir_o)->entries, dent);
-}
-
-uint32_t repo_read_path(const uint32_t *path)
-{
- uint32_t content_offset = 0;
- struct repo_dirent *dent = repo_read_dirent(active_commit, path);
- if (dent != NULL)
- content_offset = dent->content_offset;
- return content_offset;
-}
-
-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;
+ return buf.buf;
}
void repo_copy(uint32_t revision, const uint32_t *src, const uint32_t *dst)
{
- uint32_t mode = 0, content_offset = 0;
- struct repo_dirent *src_dent;
- src_dent = repo_read_dirent(revision, src);
- if (src_dent != NULL) {
- mode = src_dent->mode;
- content_offset = src_dent->content_offset;
- repo_write_dirent(dst, mode, content_offset, 0);
+ int err;
+ uint32_t mode;
+ static struct strbuf data = STRBUF_INIT;
+
+ strbuf_reset(&data);
+ err = fast_export_ls_rev(revision, REPO_MAX_PATH_DEPTH, src, &mode, &data);
+ if (err) {
+ if (errno != ENOENT)
+ die_errno("BUG: unexpected fast_export_ls_rev error");
+ fast_export_delete(REPO_MAX_PATH_DEPTH, dst);
+ return;
}
-}
-
-void repo_add(uint32_t *path, uint32_t mode, uint32_t blob_mark)
-{
- repo_write_dirent(path, mode, blob_mark, 0);
+ fast_export_modify(REPO_MAX_PATH_DEPTH, dst, mode, data.buf);
}
void repo_delete(uint32_t *path)
{
- repo_write_dirent(path, 0, 0, 1);
-}
-
-static void repo_git_add_r(uint32_t depth, uint32_t *path, struct repo_dir *dir);
-
-static void repo_git_add(uint32_t depth, uint32_t *path, struct repo_dirent *dent)
-{
- if (repo_dirent_is_dir(dent))
- repo_git_add_r(depth, path, repo_dir_from_dirent(dent));
- else
- fast_export_modify(depth, path,
- dent->mode, dent->content_offset);
-}
-
-static void repo_git_add_r(uint32_t depth, uint32_t *path, struct repo_dir *dir)
-{
- struct repo_dirent *de = repo_first_dirent(dir);
- while (de) {
- path[depth] = de->name_offset;
- repo_git_add(depth + 1, path, de);
- de = dent_next(&dir->entries, de);
- }
-}
-
-static void repo_diff_r(uint32_t depth, uint32_t *path, struct repo_dir *dir1,
- struct repo_dir *dir2)
-{
- struct repo_dirent *de1, *de2;
- de1 = repo_first_dirent(dir1);
- de2 = repo_first_dirent(dir2);
-
- while (de1 && de2) {
- if (de1->name_offset < de2->name_offset) {
- path[depth] = de1->name_offset;
- fast_export_delete(depth + 1, path);
- de1 = dent_next(&dir1->entries, de1);
- continue;
- }
- if (de1->name_offset > de2->name_offset) {
- path[depth] = de2->name_offset;
- repo_git_add(depth + 1, path, de2);
- de2 = dent_next(&dir2->entries, de2);
- continue;
- }
- path[depth] = de1->name_offset;
-
- if (de1->mode == de2->mode &&
- de1->content_offset == de2->content_offset) {
- ; /* No change. */
- } else if (repo_dirent_is_dir(de1) && repo_dirent_is_dir(de2)) {
- repo_diff_r(depth + 1, path,
- repo_dir_from_dirent(de1),
- repo_dir_from_dirent(de2));
- } else if (!repo_dirent_is_dir(de1) && !repo_dirent_is_dir(de2)) {
- repo_git_add(depth + 1, path, de2);
- } else {
- fast_export_delete(depth + 1, path);
- repo_git_add(depth + 1, path, de2);
- }
- de1 = dent_next(&dir1->entries, de1);
- de2 = dent_next(&dir2->entries, de2);
- }
- while (de1) {
- path[depth] = de1->name_offset;
- fast_export_delete(depth + 1, path);
- de1 = dent_next(&dir1->entries, de1);
- }
- while (de2) {
- path[depth] = de2->name_offset;
- repo_git_add(depth + 1, path, de2);
- de2 = dent_next(&dir2->entries, de2);
- }
-}
-
-static uint32_t path_stack[REPO_MAX_PATH_DEPTH];
-
-void repo_diff(uint32_t r1, uint32_t r2)
-{
- repo_diff_r(0,
- path_stack,
- repo_commit_root_dir(commit_pointer(r1)),
- repo_commit_root_dir(commit_pointer(r2)));
-}
-
-void repo_commit(uint32_t revision, const char *author,
- const struct strbuf *log, const char *uuid, const char *url,
- unsigned long timestamp)
-{
- fast_export_commit(revision, author, log, uuid, url, timestamp);
- dent_commit();
- dir_commit();
- active_commit = commit_alloc(1);
- commit_pointer(active_commit)->root_dir_offset =
- commit_pointer(active_commit - 1)->root_dir_offset;
-}
-
-static void mark_init(void)
-{
- uint32_t i;
- mark = 0;
- for (i = 0; i < dent_pool.size; i++)
- if (!repo_dirent_is_dir(dent_pointer(i)) &&
- dent_pointer(i)->content_offset > mark)
- mark = dent_pointer(i)->content_offset;
- mark++;
-}
-
-void repo_init(void)
-{
- mark_init();
- if (commit_pool.size == 0) {
- /* Create empty tree for commit 0. */
- commit_alloc(1);
- commit_pointer(0)->root_dir_offset = dir_alloc(1);
- dir_pointer(0)->entries.trp_root = ~0;
- dir_commit();
- }
- /* Preallocate next commit, ready for changes. */
- active_commit = commit_alloc(1);
- commit_pointer(active_commit)->root_dir_offset =
- commit_pointer(active_commit - 1)->root_dir_offset;
-}
-
-void repo_reset(void)
-{
- pool_reset();
- commit_reset();
- dir_reset();
- dent_reset();
+ fast_export_delete(REPO_MAX_PATH_DEPTH, path);
}