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Make the revision tracking track the object types too.

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This allows fsck to verify not just that an object exists, but
also that it has the type it was expected to have.
This commit is contained in:
Linus Torvalds
2005-04-17 16:19:32 -07:00
parent d0d7cbe730
commit 08ca0b04ba
3 changed files with 29 additions and 23 deletions
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22
revision.h
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@ -25,6 +25,7 @@ struct revision {
unsigned char sha1[20];
unsigned long date;
struct parent *parent;
char tag[1];
};
static struct revision **revs;
@ -51,13 +52,17 @@ static int find_rev(unsigned char *sha1)
return -first-1;
}
static struct revision *lookup_rev(unsigned char *sha1)
static struct revision *lookup_rev(unsigned char *sha1, const char *tag)
{
int pos = find_rev(sha1);
struct revision *n;
if (pos >= 0)
return revs[pos];
if (pos >= 0) {
n = revs[pos];
if (strcmp(n->tag, tag))
error("expected tag %s on object %s: got %s", tag, sha1_to_hex(sha1), n->tag);
return n;
}
pos = -pos-1;
@ -65,11 +70,12 @@ static struct revision *lookup_rev(unsigned char *sha1)
rev_allocs = alloc_nr(rev_allocs);
revs = realloc(revs, rev_allocs * sizeof(struct revision *));
}
n = malloc(sizeof(struct revision));
n = malloc(sizeof(struct revision) + strlen(tag));
n->flags = 0;
memcpy(n->sha1, sha1, 20);
n->parent = NULL;
strcpy(n->tag, tag);
/* Insert it into the right place */
memmove(revs + pos + 1, revs + pos, (nr_revs - pos) * sizeof(struct revision *));
@ -79,9 +85,9 @@ static struct revision *lookup_rev(unsigned char *sha1)
return n;
}
static struct revision *add_relationship(struct revision *rev, unsigned char *needs)
static struct revision *add_relationship(struct revision *rev, unsigned char *needs, const char *tag)
{
struct revision *parent_rev = lookup_rev(needs);
struct revision *parent_rev = lookup_rev(needs, tag);
struct parent **pp = &rev->parent, *p;
while ((p = *pp) != NULL) {
@ -131,7 +137,7 @@ static unsigned long parse_commit_date(const char *buf)
static struct revision * parse_commit(unsigned char *sha1)
{
struct revision *rev = lookup_rev(sha1);
struct revision *rev = lookup_rev(sha1, "commit");
if (!(rev->flags & SEEN)) {
void *buffer, *bufptr;
@ -145,7 +151,7 @@ static struct revision * parse_commit(unsigned char *sha1)
die("%s is not a commit object", sha1_to_hex(sha1));
bufptr += 46; /* "tree " + "hex sha1" + "\n" */
while (!memcmp(bufptr, "parent ", 7) && !get_sha1_hex(bufptr+7, parent)) {
add_relationship(rev, parent);
add_relationship(rev, parent, "commit");
parse_commit(parent);
bufptr += 48; /* "parent " + "hex sha1" + "\n" */
}