| /* |
| Copyright 2020 Google LLC |
| |
| Use of this source code is governed by a BSD-style |
| license that can be found in the LICENSE file or at |
| https://developers.google.com/open-source/licenses/bsd |
| */ |
| |
| #ifndef ITER_H |
| #define ITER_H |
| |
| #include "system.h" |
| #include "block.h" |
| #include "record.h" |
| |
| #include "reftable-iterator.h" |
| #include "reftable-generic.h" |
| |
| /* Returns true for a zeroed out iterator, such as the one returned from |
| * iterator_destroy. */ |
| int iterator_is_null(struct reftable_iterator *it); |
| |
| /* iterator that produces only ref records that point to `oid` */ |
| struct filtering_ref_iterator { |
| int double_check; |
| struct reftable_table tab; |
| struct strbuf oid; |
| struct reftable_iterator it; |
| }; |
| #define FILTERING_REF_ITERATOR_INIT \ |
| { \ |
| .oid = STRBUF_INIT \ |
| } |
| |
| void iterator_from_filtering_ref_iterator(struct reftable_iterator *, |
| struct filtering_ref_iterator *); |
| |
| /* iterator that produces only ref records that point to `oid`, |
| * but using the object index. |
| */ |
| struct indexed_table_ref_iter { |
| struct reftable_reader *r; |
| struct strbuf oid; |
| |
| /* mutable */ |
| uint64_t *offsets; |
| |
| /* Points to the next offset to read. */ |
| int offset_idx; |
| int offset_len; |
| struct block_reader block_reader; |
| struct block_iter cur; |
| int is_finished; |
| }; |
| |
| #define INDEXED_TABLE_REF_ITER_INIT { \ |
| .cur = BLOCK_ITER_INIT, \ |
| .oid = STRBUF_INIT, \ |
| } |
| |
| void iterator_from_indexed_table_ref_iter(struct reftable_iterator *it, |
| struct indexed_table_ref_iter *itr); |
| |
| /* Takes ownership of `offsets` */ |
| int new_indexed_table_ref_iter(struct indexed_table_ref_iter **dest, |
| struct reftable_reader *r, uint8_t *oid, |
| int oid_len, uint64_t *offsets, int offset_len); |
| |
| #endif |