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Streams: state machine for reverse iteration WIP 1.

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antirez
2017-11-17 13:24:20 +01:00
parent 3c5d773f82
commit ee3490ec48
4 changed files with 98 additions and 42 deletions
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7
src/stream.h
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@ -28,9 +28,10 @@ typedef struct stream {
typedef struct streamIterator {
streamID master_id; /* ID of the master entry at listpack head. */
uint64_t master_fields_count; /* Master entries # of fields. */
unsigned char *master_fields_start; /* Master entries start in listapck. */
unsigned char *master_fields_start; /* Master entries start in listpack. */
unsigned char *master_fields_ptr; /* Master field to emit next. */
int entry_flags; /* Flags of entry we are emitting. */
int rev; /* True if iterating end to start (reverse). */
uint64_t start_key[2]; /* Start key as 128 bit big endian. */
uint64_t end_key[2]; /* End key as 128 bit big endian. */
raxIterator ri; /* Rax iterator. */
@ -49,8 +50,8 @@ struct client;
stream *streamNew(void);
void freeStream(stream *s);
size_t streamReplyWithRange(struct client *c, stream *s, streamID *start, streamID *end, size_t count);
void streamIteratorStart(streamIterator *si, stream *s, streamID *start, streamID *end);
size_t streamReplyWithRange(struct client *c, stream *s, streamID *start, streamID *end, size_t count, int rev);
void streamIteratorStart(streamIterator *si, stream *s, streamID *start, streamID *end, int rev);
int streamIteratorGetID(streamIterator *si, streamID *id, int64_t *numfields);
void streamIteratorGetField(streamIterator *si, unsigned char **fieldptr, unsigned char **valueptr, int64_t *fieldlen, int64_t *valuelen);
void streamIteratorStop(streamIterator *si);