ref: refs/heads/master
commit be5e3c84e9248e200d3529aab3a7e62a5081ab0d
Author: Michael Schroeder
Date: Wed Jul 1 18:45:32 2009 +0200
add dataiterator_clonepos and dataiterator_seek
---
src/repo.h | 8 ++++++
src/repodata.c | 77 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 85 insertions(+), 0 deletions(-)
diff --git a/src/repo.h b/src/repo.h
index bb6eabd..90681dd 100644
--- a/src/repo.h
+++ b/src/repo.h
@@ -275,6 +275,14 @@ void dataiterator_skip_repo(Dataiterator *di);
void dataiterator_jump_to_solvid(Dataiterator *di, Id solvid);
void dataiterator_jump_to_repo(Dataiterator *di, Repo *repo);
void dataiterator_entersub(Dataiterator *di);
+void dataiterator_clonepos(Dataiterator *di, Dataiterator *from);
+void dataiterator_seek(Dataiterator *di, int whence);
+
+#define DI_SEEK_STAY (1 << 16)
+#define DI_SEEK_CHILD 1
+#define DI_SEEK_PARENT 2
+#define DI_SEEK_REWIND 3
+
void repo_set_id(Repo *repo, Id p, Id keyname, Id id);
void repo_set_num(Repo *repo, Id p, Id keyname, Id num);
diff --git a/src/repodata.c b/src/repodata.c
index fb88153..aa7151d 100644
--- a/src/repodata.c
+++ b/src/repodata.c
@@ -1229,6 +1229,8 @@ dataiterator_step(Dataiterator *di)
di->key = di->data->keys + *di->keyp;
di->ddp = (unsigned char *)di->kv.str;
di->keyname = di->keynames[di->nparents];
+ if (!di->ddp)
+ goto di_bye;
goto di_nextarrayelement;
/* special solvable attr handling follows */
@@ -1319,6 +1321,81 @@ dataiterator_setpos_parent(Dataiterator *di)
di->pool->pos.dp = (unsigned char *)di->kv.parent->str - di->data->incoredata;
}
+/* clones just the position, not the search keys/matcher */
+void
+dataiterator_clonepos(Dataiterator *di, Dataiterator *from)
+{
+ di->state = from->state;
+ di->flags &= ~SEARCH_THISSOLVID;
+ di->flags |= (from->flags & SEARCH_THISSOLVID);
+ di->repo = from->repo;
+ di->data = from->data;
+ di->dp = from->dp;
+ di->ddp = from->ddp;
+ di->idp = from->idp;
+ di->keyp = from->keyp;
+ di->key = from->key;
+ di->kv = from->kv;
+ di->repodataid = from->repodataid;
+ di->solvid = from->solvid;
+ di->repoid = from->repoid;
+ memcpy(di->parents, from->parents, sizeof(from->parents));
+ if (di->nparents)
+ {
+ int i;
+ for (i = 1; i < di->nparents; i++)
+ di->parents[i].kv.parent = &di->parents[i - 1].kv;
+ di->kv.parent = &di->parents[di->nparents - 1].kv;
+ }
+}
+
+void
+dataiterator_seek(Dataiterator *di, int whence)
+{
+ const char *lastparentstr = 0;
+ int i;
+
+ if ((whence & DI_SEEK_STAY) != 0)
+ {
+ for (i = 0; i < di->nparents; i++)
+ di->parents[i].kv.str = 0;
+ lastparentstr = di->nparents ? di->parents[di->nparents - 1].kv.str : 0;
+ }
+ switch (whence & ~DI_SEEK_STAY)
+ {
+ case DI_SEEK_CHILD:
+ if (di->state != di_nextarrayelement)
+ break;
+ if ((whence & DI_SEEK_STAY) != 0)
+ di->kv.str = 0;
+ di->state = di_entersub;
+ break;
+ case DI_SEEK_PARENT:
+ if (!di->nparents)
+ break;
+ if ((whence & DI_SEEK_STAY) != 0)
+ di->parents[di->nparents - 1].kv.str = lastparentstr;
+ di->nparents--;
+ di->dp = di->parents[di->nparents].dp;
+ di->kv = di->parents[di->nparents].kv;
+ di->keyp = di->parents[di->nparents].keyp;
+ di->key = di->data->keys + *di->keyp;
+ di->ddp = (unsigned char *)di->kv.str;
+ di->keyname = di->keynames[di->nparents];
+ di->state = di->ddp ? di_nextarrayelement : di_bye;
+ break;
+ case DI_SEEK_REWIND:
+ if (!di->nparents)
+ break;
+ di->dp = (unsigned char *)di->kv.parent->str;
+ di->keyp = di->data->schemadata + di->data->schemata[di->kv.parent->id];
+ di->state = di_enterschema;
+ break;
+ default:
+ break;
+ }
+}
+
void
dataiterator_skip_attribute(Dataiterator *di)
{
--
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