Merge branch 'lt/xsha1'

* lt/xsha1:
  get_tree_entry(): make it available from tree-walk
  sha1_name.c: no need to include diff.h; tree-walk.h will do.
  sha1_name.c: prepare to make get_tree_entry() reusable from others.
  get_sha1() shorthands for blob/tree objects
This commit is contained in:
Junio C Hamano 2006-04-19 15:57:45 -07:00
commit a4d0cced53
3 changed files with 67 additions and 1 deletions

View file

@ -3,6 +3,7 @@
#include "commit.h"
#include "tree.h"
#include "blob.h"
#include "tree-walk.h"
static int find_short_object_filename(int len, const char *name, unsigned char *sha1)
{
@ -455,6 +456,19 @@ static int get_sha1_1(const char *name, int len, unsigned char *sha1)
*/
int get_sha1(const char *name, unsigned char *sha1)
{
int ret;
unsigned unused;
prepare_alt_odb();
return get_sha1_1(name, strlen(name), sha1);
ret = get_sha1_1(name, strlen(name), sha1);
if (ret < 0) {
const char *cp = strchr(name, ':');
if (cp) {
unsigned char tree_sha1[20];
if (!get_sha1_1(name, cp-name, tree_sha1))
return get_tree_entry(tree_sha1, cp+1, sha1,
&unused);
}
}
return ret;
}

View file

@ -115,3 +115,53 @@ void traverse_trees(int n, struct tree_desc *t, const char *base, traverse_callb
free(entry);
}
static int find_tree_entry(struct tree_desc *t, const char *name, unsigned char *result, unsigned *mode)
{
int namelen = strlen(name);
while (t->size) {
const char *entry;
const unsigned char *sha1;
int entrylen, cmp;
sha1 = tree_entry_extract(t, &entry, mode);
update_tree_entry(t);
entrylen = strlen(entry);
if (entrylen > namelen)
continue;
cmp = memcmp(name, entry, entrylen);
if (cmp > 0)
continue;
if (cmp < 0)
break;
if (entrylen == namelen) {
memcpy(result, sha1, 20);
return 0;
}
if (name[entrylen] != '/')
continue;
if (!S_ISDIR(*mode))
break;
if (++entrylen == namelen) {
memcpy(result, sha1, 20);
return 0;
}
return get_tree_entry(sha1, name + entrylen, result, mode);
}
return -1;
}
int get_tree_entry(const unsigned char *tree_sha1, const char *name, unsigned char *sha1, unsigned *mode)
{
int retval;
void *tree;
struct tree_desc t;
tree = read_object_with_reference(tree_sha1, tree_type, &t.size, NULL);
if (!tree)
return -1;
t.buf = tree;
retval = find_tree_entry(&t, name, sha1, mode);
free(tree);
return retval;
}

View file

@ -22,4 +22,6 @@ typedef void (*traverse_callback_t)(int n, unsigned long mask, struct name_entry
void traverse_trees(int n, struct tree_desc *t, const char *base, traverse_callback_t callback);
int get_tree_entry(const unsigned char *, const char *, unsigned char *, unsigned *);
#endif