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WIP reclaimed 0x3ff as invalid id

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This commit is contained in:
Christopher Haster
2018-07-09 14:51:57 -05:00
parent 5b9755f141
commit 0276e00fac
3 changed files with 16 additions and 23 deletions
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25
lfs.c
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@@ -439,10 +439,6 @@ static inline bool lfs_tag_isuser(lfs_tag_t tag) {
return (tag & 0x40000000);
}
static inline bool lfs_tag_hasid(lfs_tag_t tag) {
return (tag & 0x60000000) != 0x20000000;
}
static inline uint16_t lfs_tag_type(lfs_tag_t tag) {
return (tag & 0x7fc00000) >> 22;
}
@@ -498,14 +494,14 @@ static int lfs_commit_move(lfs_t *lfs, struct lfs_commit *commit,
static int lfs_commit_commit(lfs_t *lfs,
struct lfs_commit *commit, lfs_mattr_t attr) {
// filter out ids
if (lfs_tag_hasid(attr.tag) && (
if (lfs_tag_id(attr.tag) < 0x3ff && (
lfs_tag_id(attr.tag) < commit->filter.begin ||
lfs_tag_id(attr.tag) >= commit->filter.end)) {
return 0;
}
// special cases
if (lfs_tag_type(attr.tag) == LFS_FROM_MOVE) {
if (lfs_tag_type(attr.tag) == LFS_FROM_DIR) {
return lfs_commit_move(lfs, commit,
lfs_tag_size(attr.tag), lfs_tag_id(attr.tag),
attr.u.dir, NULL);
@@ -657,8 +653,7 @@ static int lfs_commit_movescan(lfs_t *lfs, void *p, lfs_mattr_t attr) {
return 0;
}
// TODO need this if 0x3ff is required?
if (!lfs_tag_hasid(attr.tag) || lfs_tag_id(attr.tag) != move->id.from) {
if (lfs_tag_id(attr.tag) != move->id.from) {
// ignore non-matching ids
return 0;
}
@@ -721,9 +716,8 @@ static int lfs_commit_globals(lfs_t *lfs, struct lfs_commit *commit,
// TODO check performance/complexity of different strategies here
lfs_globals_t res = lfs_globals_xor(source, diff);
int err = lfs_commit_commit(lfs, commit, (lfs_mattr_t){
lfs_mktag(LFS_TYPE_GLOBALS,
res.move.id, sizeof(res.move.pair)),
.u.buffer=res.move.pair});
lfs_mktag(LFS_TYPE_GLOBALS, 0x3ff, sizeof(res)),
.u.buffer=&res});
if (err) {
return err;
}
@@ -899,15 +893,14 @@ static int lfs_dir_fetchwith(lfs_t *lfs,
return err;
}
} else if (lfs_tag_type(tag) == LFS_TYPE_GLOBALS) {
temp.globals.move.id = lfs_tag_id(tag);
err = lfs_bd_read(lfs, temp.pair[0], off+sizeof(tag),
&temp.globals.move.pair,
sizeof(temp.globals.move.pair));
&temp.globals, sizeof(temp.globals));
if (err) {
return err;
}
} else {
if (lfs_tag_hasid(tag) && lfs_tag_id(tag) >= temp.count) {
if (lfs_tag_id(tag) < 0x3ff &&
lfs_tag_id(tag) >= temp.count) {
temp.count = lfs_tag_id(tag)+1;
}
@@ -2822,7 +2815,7 @@ int lfs_rename(lfs_t *lfs, const char *oldpath, const char *newpath) {
err = lfs_dir_commit(lfs, &newcwd, &(lfs_mattrlist_t){
{lfs_mktag(oldtype, newid, strlen(newpath)),
.u.buffer=(void*)newpath}, &(lfs_mattrlist_t){
{lfs_mktag(LFS_FROM_MOVE, newid, oldid),
{lfs_mktag(LFS_FROM_DIR, newid, oldid),
.u.dir=&oldcwd}}});
if (err) {
return err;