59 lines
1.5 KiB
C
59 lines
1.5 KiB
C
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#ifndef ROPE_H_
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#define ROPE_H_
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#include <stdint.h>
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#include <stdio.h>
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#define ROPE_MAX_DEPTH 80
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#define ROPE_DEF_MAX_NODES 64
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#define ROPE_DEF_BLOCK_LEN 512
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typedef struct rpnode_s {
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struct rpnode_s *p; // child; at the bottom level, $p points to a string with the first 2 bytes giving the number of runs (#runs)
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uint64_t l:54, n:9, is_bottom:1; // $n and $is_bottom are only set for the first node in a bucket
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int64_t c[6]; // marginal counts
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} rpnode_t;
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typedef struct {
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int32_t max_nodes, block_len; // both MUST BE even numbers
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int64_t c[6]; // marginal counts
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rpnode_t *root;
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void *node, *leaf; // memory pool
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} rope_t;
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typedef struct {
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const rope_t *rope; // the rope
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const rpnode_t *pa[ROPE_MAX_DEPTH]; // parent nodes
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int ia[ROPE_MAX_DEPTH]; // index in the parent nodes
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int d; // the current depth in the B+-tree
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} rpitr_t;
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typedef struct {
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int beg;
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int64_t bc[6];
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uint8_t *p;
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} rpcache_t;
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#ifdef __cplusplus
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extern "C" {
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#endif
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rope_t *rope_init(int max_nodes, int block_len);
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void rope_destroy(rope_t *rope);
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int64_t rope_insert_run(rope_t *rope, int64_t x, int a, int64_t rl, rpcache_t *cache);
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void rope_rank2a(const rope_t *rope, int64_t x, int64_t y, int64_t *cx, int64_t *cy);
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#define rope_rank1a(rope, x, cx) rope_rank2a(rope, x, -1, cx, 0)
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void rope_itr_first(const rope_t *rope, rpitr_t *i);
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const uint8_t *rope_itr_next_block(rpitr_t *i);
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void rope_print_node(const rpnode_t *p);
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void rope_dump(const rope_t *r, FILE *fp);
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rope_t *rope_restore(FILE *fp);
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#ifdef __cplusplus
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}
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#endif
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#endif
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