diff options
Diffstat (limited to 'reftable/iter.h')
| -rw-r--r-- | reftable/iter.h | 40 |
1 files changed, 32 insertions, 8 deletions
diff --git a/reftable/iter.h b/reftable/iter.h index 537431baba..40f98893b8 100644 --- a/reftable/iter.h +++ b/reftable/iter.h @@ -14,18 +14,42 @@ https://developers.google.com/open-source/licenses/bsd #include "record.h" #include "reftable-iterator.h" -#include "reftable-generic.h" + +/* + * The virtual function table for implementing generic reftable iterators. + */ +struct reftable_iterator_vtable { + int (*seek)(void *iter_arg, struct reftable_record *want); + int (*next)(void *iter_arg, struct reftable_record *rec); + void (*close)(void *iter_arg); +}; + +/* + * Position the iterator at the wanted record such that a call to + * `iterator_next()` would return that record, if it exists. + */ +int iterator_seek(struct reftable_iterator *it, struct reftable_record *want); + +/* + * Yield the next record and advance the iterator. Returns <0 on error, 0 when + * a record was yielded, and >0 when the iterator hit an error. + */ +int iterator_next(struct reftable_iterator *it, struct reftable_record *rec); + +/* + * Set up the iterator such that it behaves the same as an iterator with no + * entries. + */ +void iterator_set_empty(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_buf oid; struct reftable_iterator it; }; #define FILTERING_REF_ITERATOR_INIT \ { \ - .oid = STRBUF_INIT \ + .oid = REFTABLE_BUF_INIT \ } void iterator_from_filtering_ref_iterator(struct reftable_iterator *, @@ -36,7 +60,7 @@ void iterator_from_filtering_ref_iterator(struct reftable_iterator *, */ struct indexed_table_ref_iter { struct reftable_reader *r; - struct strbuf oid; + struct reftable_buf oid; /* mutable */ uint64_t *offsets; @@ -51,14 +75,14 @@ struct indexed_table_ref_iter { #define INDEXED_TABLE_REF_ITER_INIT { \ .cur = BLOCK_ITER_INIT, \ - .oid = STRBUF_INIT, \ + .oid = REFTABLE_BUF_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, +int indexed_table_ref_iter_new(struct indexed_table_ref_iter **dest, struct reftable_reader *r, uint8_t *oid, int oid_len, uint64_t *offsets, int offset_len); |