cmd ::= new_blob
| new_commit
| new_tag
+ | reset_branch
;
new_blob ::= 'blob' lf
tag_msg;
tag_msg ::= data;
+ reset_branch ::= 'reset' sp ref_str lf;
+
# note: the first idnum in a stream should be 1 and subsequent
# idnums should not have gaps between values as this will cause
# the stream parser to reserve space for the gapped values. An
struct last_object
{
void *data;
- unsigned int len;
+ unsigned long len;
unsigned int depth;
unsigned char sha1[20];
};
{
struct tree_content *tree;
struct atom_str* name;
- unsigned int mode;
- unsigned char sha1[20];
+ struct tree_entry_ms
+ {
+ unsigned int mode;
+ unsigned char sha1[20];
+ } versions[2];
};
struct tree_content
{
unsigned int entry_capacity; /* must match avail_tree_content */
unsigned int entry_count;
+ unsigned int delta_depth;
struct tree_entry *entries[FLEX_ARRAY]; /* more */
};
static unsigned long marks_set_count;
static unsigned long object_count_by_type[9];
static unsigned long duplicate_count_by_type[9];
+static unsigned long delta_count_by_type[9];
/* Memory pools */
static size_t mem_pool_alloc = 2*1024*1024 - sizeof(struct mem_pool);
static unsigned long page_size;
/* Table of objects we've written. */
-static unsigned int object_entry_alloc = 1000;
+static unsigned int object_entry_alloc = 5000;
static struct object_entry_pool *blocks;
static struct object_entry *object_table[1 << 16];
static struct mark_set *marks;
alloc_objects(object_entry_alloc);
e = blocks->next_free++;
- memcpy(e->sha1, sha1, sizeof(e->sha1));
+ hashcpy(e->sha1, sha1);
return e;
}
unsigned int h = sha1[0] << 8 | sha1[1];
struct object_entry *e;
for (e = object_table[h]; e; e = e->next)
- if (!memcmp(sha1, e->sha1, sizeof(e->sha1)))
+ if (!hashcmp(sha1, e->sha1))
return e;
return NULL;
}
struct object_entry *p = NULL;
while (e) {
- if (!memcmp(sha1, e->sha1, sizeof(e->sha1)))
+ if (!hashcmp(sha1, e->sha1))
return e;
p = e;
e = e->next;
t = (struct tree_content*)f;
t->entry_count = 0;
+ t->delta_depth = 0;
return t;
}
{
struct tree_content *r = new_tree_content(t->entry_count + amt);
r->entry_count = t->entry_count;
+ r->delta_depth = t->delta_depth;
memcpy(r->entries,t->entries,t->entry_count*sizeof(t->entries[0]));
release_tree_content(t);
return r;
SHA1_Update(&c, dat, datlen);
SHA1_Final(sha1, &c);
if (sha1out)
- memcpy(sha1out, sha1, sizeof(sha1));
+ hashcpy(sha1out, sha1);
e = insert_object(sha1);
if (mark)
deflateInit(&s, zlib_compression_level);
if (delta) {
+ delta_count_by_type[type]++;
last->depth++;
s.next_in = delta;
s.avail_in = deltalen;
free(last->data);
last->data = dat;
last->len = datlen;
- memcpy(last->sha1, sha1, sizeof(sha1));
+ hashcpy(last->sha1, sha1);
}
return 0;
}
return result;
}
-static void *unpack_entry(unsigned long offset, unsigned long *sizep);
+static void *unpack_entry(unsigned long offset,
+ unsigned long *sizep,
+ unsigned int *delta_depth);
static void *unpack_delta_entry(unsigned long offset,
unsigned long delta_size,
- unsigned long *sizep)
+ unsigned long *sizep,
+ unsigned int *delta_depth)
{
struct object_entry *base_oe;
unsigned char *base_sha1;
base_oe = find_object(base_sha1);
if (!base_oe)
die("I'm broken; I can't find a base I know must be here.");
- base = unpack_entry(base_oe->offset, &base_size);
+ base = unpack_entry(base_oe->offset, &base_size, delta_depth);
delta_data = unpack_non_delta_entry(offset + 20, delta_size);
result = patch_delta(base, base_size,
delta_data, delta_size,
free(delta_data);
free(base);
*sizep = result_size;
+ (*delta_depth)++;
return result;
}
-static void *unpack_entry(unsigned long offset, unsigned long *sizep)
+static void *unpack_entry(unsigned long offset,
+ unsigned long *sizep,
+ unsigned int *delta_depth)
{
unsigned long size;
enum object_type kind;
offset = unpack_object_header(offset, &kind, &size);
switch (kind) {
case OBJ_DELTA:
- return unpack_delta_entry(offset, size, sizep);
+ return unpack_delta_entry(offset, size, sizep, delta_depth);
case OBJ_COMMIT:
case OBJ_TREE:
case OBJ_BLOB:
case OBJ_TAG:
*sizep = size;
+ *delta_depth = 0;
return unpack_non_delta_entry(offset, size);
default:
die("I created an object I can't read!");
static void load_tree(struct tree_entry *root)
{
+ unsigned char* sha1 = root->versions[1].sha1;
struct object_entry *myoe;
struct tree_content *t;
unsigned long size;
const char *c;
root->tree = t = new_tree_content(8);
- if (!memcmp(root->sha1, null_sha1, 20))
+ if (is_null_sha1(sha1))
return;
- myoe = find_object(root->sha1);
+ myoe = find_object(sha1);
if (myoe) {
if (myoe->type != OBJ_TREE)
- die("Not a tree: %s", sha1_to_hex(root->sha1));
- buf = unpack_entry(myoe->offset, &size);
+ die("Not a tree: %s", sha1_to_hex(sha1));
+ buf = unpack_entry(myoe->offset, &size, &t->delta_depth);
} else {
char type[20];
- buf = read_sha1_file(root->sha1, type, &size);
+ buf = read_sha1_file(sha1, type, &size);
if (!buf || strcmp(type, tree_type))
- die("Can't load tree %s", sha1_to_hex(root->sha1));
+ die("Can't load tree %s", sha1_to_hex(sha1));
}
c = buf;
t->entries[t->entry_count++] = e;
e->tree = NULL;
- c = get_mode(c, &e->mode);
+ c = get_mode(c, &e->versions[1].mode);
if (!c)
- die("Corrupt mode in %s", sha1_to_hex(root->sha1));
+ die("Corrupt mode in %s", sha1_to_hex(sha1));
+ e->versions[0].mode = e->versions[1].mode;
e->name = to_atom(c, strlen(c));
c += e->name->str_len + 1;
- memcpy(e->sha1, c, sizeof(e->sha1));
+ hashcpy(e->versions[0].sha1, (unsigned char*)c);
+ hashcpy(e->versions[1].sha1, (unsigned char*)c);
c += 20;
}
free(buf);
}
-static int tecmp (const void *_a, const void *_b)
+static int tecmp0 (const void *_a, const void *_b)
{
struct tree_entry *a = *((struct tree_entry**)_a);
struct tree_entry *b = *((struct tree_entry**)_b);
return base_name_compare(
- a->name->str_dat, a->name->str_len, a->mode,
- b->name->str_dat, b->name->str_len, b->mode);
+ a->name->str_dat, a->name->str_len, a->versions[0].mode,
+ b->name->str_dat, b->name->str_len, b->versions[0].mode);
}
-static void store_tree(struct tree_entry *root)
+static int tecmp1 (const void *_a, const void *_b)
{
- struct tree_content *t = root->tree;
+ struct tree_entry *a = *((struct tree_entry**)_a);
+ struct tree_entry *b = *((struct tree_entry**)_b);
+ return base_name_compare(
+ a->name->str_dat, a->name->str_len, a->versions[1].mode,
+ b->name->str_dat, b->name->str_len, b->versions[1].mode);
+}
+
+static void* mktree(struct tree_content *t, int v, unsigned long *szp)
+{
+ size_t maxlen = 0;
unsigned int i;
- size_t maxlen;
char *buf, *c;
- if (memcmp(root->sha1, null_sha1, 20))
- return;
+ if (!v)
+ qsort(t->entries,t->entry_count,sizeof(t->entries[0]),tecmp0);
+ else
+ qsort(t->entries,t->entry_count,sizeof(t->entries[0]),tecmp1);
- maxlen = 0;
for (i = 0; i < t->entry_count; i++) {
- maxlen += t->entries[i]->name->str_len + 34;
- if (t->entries[i]->tree)
- store_tree(t->entries[i]);
+ if (t->entries[i]->versions[v].mode)
+ maxlen += t->entries[i]->name->str_len + 34;
}
- qsort(t->entries, t->entry_count, sizeof(t->entries[0]), tecmp);
buf = c = xmalloc(maxlen);
for (i = 0; i < t->entry_count; i++) {
struct tree_entry *e = t->entries[i];
- c += sprintf(c, "%o", e->mode);
+ if (!e->versions[v].mode)
+ continue;
+ c += sprintf(c, "%o", e->versions[v].mode);
*c++ = ' ';
strcpy(c, e->name->str_dat);
c += e->name->str_len + 1;
- memcpy(c, e->sha1, 20);
+ hashcpy((unsigned char*)c, e->versions[v].sha1);
c += 20;
}
- store_object(OBJ_TREE, buf, c - buf, NULL, root->sha1, 0);
- free(buf);
+
+ *szp = c - buf;
+ return buf;
+}
+
+static void store_tree(struct tree_entry *root)
+{
+ struct tree_content *t = root->tree;
+ unsigned int i, j, del;
+ unsigned long vers1len;
+ void **vers1dat;
+ struct last_object lo;
+
+ if (!is_null_sha1(root->versions[1].sha1))
+ return;
+
+ for (i = 0; i < t->entry_count; i++) {
+ if (t->entries[i]->tree)
+ store_tree(t->entries[i]);
+ }
+
+ if (is_null_sha1(root->versions[0].sha1)
+ || !find_object(root->versions[0].sha1)) {
+ lo.data = NULL;
+ lo.depth = 0;
+ } else {
+ lo.data = mktree(t, 0, &lo.len);
+ lo.depth = t->delta_depth;
+ hashcpy(lo.sha1, root->versions[0].sha1);
+ }
+ vers1dat = mktree(t, 1, &vers1len);
+
+ store_object(OBJ_TREE, vers1dat, vers1len,
+ &lo, root->versions[1].sha1, 0);
+ /* note: lo.dat (if created) was freed by store_object */
+ free(vers1dat);
+
+ t->delta_depth = lo.depth;
+ hashcpy(root->versions[0].sha1, root->versions[1].sha1);
+ for (i = 0, j = 0, del = 0; i < t->entry_count; i++) {
+ struct tree_entry *e = t->entries[i];
+ if (e->versions[1].mode) {
+ e->versions[0].mode = e->versions[1].mode;
+ hashcpy(e->versions[0].sha1, e->versions[1].sha1);
+ t->entries[j++] = e;
+ } else {
+ release_tree_entry(e);
+ del++;
+ }
+ }
+ t->entry_count -= del;
}
static int tree_content_set(
e = t->entries[i];
if (e->name->str_len == n && !strncmp(p, e->name->str_dat, n)) {
if (!slash1) {
- if (e->mode == mode && !memcmp(e->sha1, sha1, 20))
+ if (e->versions[1].mode == mode
+ && !hashcmp(e->versions[1].sha1, sha1))
return 0;
- e->mode = mode;
- memcpy(e->sha1, sha1, 20);
+ e->versions[1].mode = mode;
+ hashcpy(e->versions[1].sha1, sha1);
if (e->tree) {
release_tree_content_recursive(e->tree);
e->tree = NULL;
}
- memcpy(root->sha1, null_sha1, 20);
+ hashclr(root->versions[1].sha1);
return 1;
}
- if (!S_ISDIR(e->mode)) {
+ if (!S_ISDIR(e->versions[1].mode)) {
e->tree = new_tree_content(8);
- e->mode = S_IFDIR;
+ e->versions[1].mode = S_IFDIR;
}
if (!e->tree)
load_tree(e);
if (tree_content_set(e, slash1 + 1, sha1, mode)) {
- memcpy(root->sha1, null_sha1, 20);
+ hashclr(root->versions[1].sha1);
return 1;
}
return 0;
root->tree = t = grow_tree_content(t, 8);
e = new_tree_entry();
e->name = to_atom(p, n);
+ e->versions[0].mode = 0;
+ hashclr(e->versions[0].sha1);
t->entries[t->entry_count++] = e;
if (slash1) {
e->tree = new_tree_content(8);
- e->mode = S_IFDIR;
+ e->versions[1].mode = S_IFDIR;
tree_content_set(e, slash1 + 1, sha1, mode);
} else {
e->tree = NULL;
- e->mode = mode;
- memcpy(e->sha1, sha1, 20);
+ e->versions[1].mode = mode;
+ hashcpy(e->versions[1].sha1, sha1);
}
- memcpy(root->sha1, null_sha1, 20);
+ hashclr(root->versions[1].sha1);
return 1;
}
for (i = 0; i < t->entry_count; i++) {
e = t->entries[i];
if (e->name->str_len == n && !strncmp(p, e->name->str_dat, n)) {
- if (!slash1 || !S_ISDIR(e->mode))
+ if (!slash1 || !S_ISDIR(e->versions[1].mode))
goto del_entry;
if (!e->tree)
load_tree(e);
if (tree_content_remove(e, slash1 + 1)) {
if (!e->tree->entry_count)
goto del_entry;
- memcpy(root->sha1, null_sha1, 20);
+ hashclr(root->versions[1].sha1);
return 1;
}
return 0;
return 0;
del_entry:
- for (i++; i < t->entry_count; i++)
- t->entries[i-1] = t->entries[i];
- t->entry_count--;
- release_tree_entry(e);
- memcpy(root->sha1, null_sha1, 20);
+ if (e->tree) {
+ release_tree_content_recursive(e->tree);
+ e->tree = NULL;
+ }
+ e->versions[1].mode = 0;
+ hashclr(e->versions[1].sha1);
+ hashclr(root->versions[1].sha1);
return 1;
}
{
struct object_entry *a = *((struct object_entry**)_a);
struct object_entry *b = *((struct object_entry**)_b);
- return memcmp(a->sha1, b->sha1, sizeof(a->sha1));
+ return hashcmp(a->sha1, b->sha1);
}
static void write_index(const char *idx_name)
if (b == s)
die("Can't create a branch from itself: %s", b->name);
else if (s) {
- memcpy(b->sha1, s->sha1, 20);
- memcpy(b->branch_tree.sha1, s->branch_tree.sha1, 20);
+ unsigned char *t = s->branch_tree.versions[1].sha1;
+ hashcpy(b->sha1, s->sha1);
+ hashcpy(b->branch_tree.versions[0].sha1, t);
+ hashcpy(b->branch_tree.versions[1].sha1, t);
} else if (*from == ':') {
unsigned long idnum = strtoul(from + 1, NULL, 10);
struct object_entry *oe = find_mark(idnum);
unsigned long size;
+ unsigned int depth;
char *buf;
if (oe->type != OBJ_COMMIT)
die("Mark :%lu not a commit", idnum);
- memcpy(b->sha1, oe->sha1, 20);
- buf = unpack_entry(oe->offset, &size);
+ hashcpy(b->sha1, oe->sha1);
+ buf = unpack_entry(oe->offset, &size, &depth);
if (!buf || size < 46)
die("Not a valid commit: %s", from);
if (memcmp("tree ", buf, 5)
- || get_sha1_hex(buf + 5, b->branch_tree.sha1))
+ || get_sha1_hex(buf + 5, b->branch_tree.versions[1].sha1))
die("The commit %s is corrupt", sha1_to_hex(b->sha1));
free(buf);
+ hashcpy(b->branch_tree.versions[0].sha1,
+ b->branch_tree.versions[1].sha1);
} else if (!get_sha1(from, b->sha1)) {
- if (!memcmp(b->sha1, null_sha1, 20))
- memcpy(b->branch_tree.sha1, null_sha1, 20);
- else {
+ if (is_null_sha1(b->sha1)) {
+ hashclr(b->branch_tree.versions[0].sha1);
+ hashclr(b->branch_tree.versions[1].sha1);
+ } else {
unsigned long size;
char *buf;
if (!buf || size < 46)
die("Not a valid commit: %s", from);
if (memcmp("tree ", buf, 5)
- || get_sha1_hex(buf + 5, b->branch_tree.sha1))
+ || get_sha1_hex(buf + 5, b->branch_tree.versions[1].sha1))
die("The commit %s is corrupt", sha1_to_hex(b->sha1));
free(buf);
+ hashcpy(b->branch_tree.versions[0].sha1,
+ b->branch_tree.versions[1].sha1);
}
} else
die("Invalid ref name or SHA1 expression: %s", from);
? strlen(author) + strlen(committer)
: 2 * strlen(committer)));
sp = body;
- sp += sprintf(sp, "tree %s\n", sha1_to_hex(b->branch_tree.sha1));
- if (memcmp(b->sha1, null_sha1, 20))
+ sp += sprintf(sp, "tree %s\n",
+ sha1_to_hex(b->branch_tree.versions[1].sha1));
+ if (!is_null_sha1(b->sha1))
sp += sprintf(sp, "parent %s\n", sha1_to_hex(b->sha1));
if (author)
sp += sprintf(sp, "%s\n", author);
s = lookup_branch(from);
if (s) {
- memcpy(sha1, s->sha1, 20);
+ hashcpy(sha1, s->sha1);
} else if (*from == ':') {
from_mark = strtoul(from + 1, NULL, 10);
struct object_entry *oe = find_mark(from_mark);
if (oe->type != OBJ_COMMIT)
die("Mark :%lu not a commit", from_mark);
- memcpy(sha1, oe->sha1, 20);
+ hashcpy(sha1, oe->sha1);
} else if (!get_sha1(from, sha1)) {
unsigned long size;
char *buf;
}
}
+static void cmd_reset_branch()
+{
+ struct branch *b;
+ char *str_uq;
+ const char *endp;
+ char *sp;
+
+ /* Obtain the branch name from the rest of our command */
+ sp = strchr(command_buf.buf, ' ') + 1;
+ str_uq = unquote_c_style(sp, &endp);
+ if (str_uq) {
+ if (*endp)
+ die("Garbage after ref in: %s", command_buf.buf);
+ sp = str_uq;
+ }
+ b = lookup_branch(sp);
+ if (b) {
+ b->last_commit = 0;
+ if (b->branch_tree.tree) {
+ release_tree_content_recursive(b->branch_tree.tree);
+ b->branch_tree.tree = NULL;
+ }
+ }
+ if (str_uq)
+ free(str_uq);
+}
+
static const char fast_import_usage[] =
"git-fast-import [--objects=n] [--depth=n] [--active-branches=n] [--export-marks=marks.file] [--branch-log=log] temp.pack";
cmd_new_commit();
else if (!strncmp("tag ", command_buf.buf, 4))
cmd_new_tag();
+ else if (!strncmp("reset ", command_buf.buf, 6))
+ cmd_reset_branch();
else
die("Unsupported command: %s", command_buf.buf);
}
dump_branches();
dump_tags();
dump_marks();
- fclose(branch_log);
+ if (branch_log)
+ fclose(branch_log);
fprintf(stderr, "%s statistics:\n", argv[0]);
fprintf(stderr, "---------------------------------------------------\n");
fprintf(stderr, "Alloc'd objects: %10lu (%10lu overflow )\n", alloc_count, alloc_count - est_obj_cnt);
fprintf(stderr, "Total objects: %10lu (%10lu duplicates)\n", object_count, duplicate_count);
- fprintf(stderr, " blobs : %10lu (%10lu duplicates)\n", object_count_by_type[OBJ_BLOB], duplicate_count_by_type[OBJ_BLOB]);
- fprintf(stderr, " trees : %10lu (%10lu duplicates)\n", object_count_by_type[OBJ_TREE], duplicate_count_by_type[OBJ_TREE]);
- fprintf(stderr, " commits: %10lu (%10lu duplicates)\n", object_count_by_type[OBJ_COMMIT], duplicate_count_by_type[OBJ_COMMIT]);
- fprintf(stderr, " tags : %10lu (%10lu duplicates)\n", object_count_by_type[OBJ_TAG], duplicate_count_by_type[OBJ_TAG]);
+ fprintf(stderr, " blobs : %10lu (%10lu duplicates %10lu deltas)\n", object_count_by_type[OBJ_BLOB], duplicate_count_by_type[OBJ_BLOB], delta_count_by_type[OBJ_BLOB]);
+ fprintf(stderr, " trees : %10lu (%10lu duplicates %10lu deltas)\n", object_count_by_type[OBJ_TREE], duplicate_count_by_type[OBJ_TREE], delta_count_by_type[OBJ_TREE]);
+ fprintf(stderr, " commits: %10lu (%10lu duplicates %10lu deltas)\n", object_count_by_type[OBJ_COMMIT], duplicate_count_by_type[OBJ_COMMIT], delta_count_by_type[OBJ_COMMIT]);
+ fprintf(stderr, " tags : %10lu (%10lu duplicates %10lu deltas)\n", object_count_by_type[OBJ_TAG], duplicate_count_by_type[OBJ_TAG], delta_count_by_type[OBJ_TAG]);
fprintf(stderr, "Total branches: %10lu (%10lu loads )\n", branch_count, branch_load_count);
fprintf(stderr, " marks: %10u (%10lu unique )\n", (1 << marks->shift) * 1024, marks_set_count);
fprintf(stderr, " atoms: %10u\n", atom_cnt);