/*
* We are looking at the origin 'target' and aiming to pass blame
* for the lines it is suspected to its parent. Run diff to find
* which lines came from parent and pass blame for them.
*/
static void pass_blame_to_parent(struct blame_scoreboard *sb,
struct blame_origin *target,
struct blame_origin *parent)
{
mmfile_t file_p, file_o;
struct blame_chunk_cb_data d;
struct blame_entry *newdest = NULL;
if (!target->suspects)
return; /* nothing remains for this target */
d.parent = parent;
d.offset = 0;
d.dstq = &newdest; d.srcq = &target->suspects;
fill_origin_blob(&sb->revs->diffopt, parent, &file_p, &sb->num_read_blob);
fill_origin_blob(&sb->revs->diffopt, target, &file_o, &sb->num_read_blob);
sb->num_get_patch++;
if (diff_hunks(&file_p, &file_o, blame_chunk_cb, &d, sb->xdl_opts))
die("unable to generate diff (%s -> %s)",
oid_to_hex(&parent->commit->object.oid),
oid_to_hex(&target->commit->object.oid));
/* The rest are the same as the parent */
blame_chunk(&d.dstq, &d.srcq, INT_MAX, d.offset, INT_MAX, parent);
*d.dstq = NULL;
queue_blames(sb, parent, newdest);
return;
}
/* diff chunks are from parent to target */
static int blame_chunk_cb(long start_a, long count_a,
long start_b, long count_b, void *data)
{
struct blame_chunk_cb_data *d = data;
if (start_a - start_b != d->offset)
die("internal error in blame::blame_chunk_cb");
blame_chunk(&d->dstq, &d->srcq, start_b, start_a - start_b,
start_b + count_b, d->parent);
d->offset = start_a + count_a - (start_b + count_b);
return 0;
}
static int my_emit(
long start_a, long count_a,
long start_b, long count_b,
void *cb_data)
{
blame_chunk_cb_data *d = (blame_chunk_cb_data *)cb_data;
blame_chunk(d->blame, d->tlno, d->plno, start_b, d->target, d->parent);
d->plno = start_a + count_a;
d->tlno = start_b + count_b;
return 0;
}
static int my_emit(
xdfenv_t *xe,
xdchange_t *xscr,
xdemitcb_t *ecb,
xdemitconf_t const *xecfg)
{
xdchange_t *xch = xscr;
GIT_UNUSED(xe);
GIT_UNUSED(xecfg);
while (xch) {
blame_chunk_cb_data *d = (blame_chunk_cb_data *) ecb->priv;
blame_chunk(d->blame, d->tlno, d->plno, xch->i2, d->target, d->parent);
d->plno = xch->i1 + xch->chg1;
d->tlno = xch->i2 + xch->chg2;
xch = xch->next;
}
return 0;
}
static int pass_blame_to_parent(
git_blame *blame,
git_blame__origin *target,
git_blame__origin *parent)
{
int last_in_target;
mmfile_t file_p, file_o;
blame_chunk_cb_data d = { blame, target, parent, 0, 0 };
last_in_target = find_last_in_target(blame, target);
if (last_in_target < 0)
return 1; /* nothing remains for this target */
fill_origin_blob(parent, &file_p);
fill_origin_blob(target, &file_o);
diff_hunks(file_p, file_o, &d);
/* The reset (i.e. anything after tlno) are the same as the parent */
blame_chunk(blame, d.tlno, d.plno, last_in_target, target, parent);
return 0;
}
