66 lines
1.6 KiB
C++
66 lines
1.6 KiB
C++
#pragma once
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#include "constants.h"
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#include "pch.h"
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#include "storage/original.h"
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#include "storage/storage.h"
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namespace bed::internal::vase {
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struct Shard {
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enum struct Kind : uint8_t {
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Branch,
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Petal
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} kind;
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uint16_t height;
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std::atomic_uint32_t refs;
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uint64_t length;
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uint64_t lines;
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Shard(Kind kind, uint64_t length, uint64_t lines, uint16_t height)
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: kind(kind), height(height), refs(1), length(length), lines(lines) {};
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static void retain(Shard *n);
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static void release(Shard *n);
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static Shard *from_file(const std::filesystem::path &path, bool posix_ending);
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static Shard *from_string(const char *data, uint64_t len, bool posix_ending);
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static Shard *from_command(const char *cmd, bool posix_ending);
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static std::pair<Shard *, Shard *> split(Shard *n, uint64_t offset);
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static Shard *concat(Shard *a, Shard *b);
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static Shard *merge_leaves(Shard *a, Shard *b);
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static Shard *append(Shard *root, Shard *leaf);
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static Shard *build(Shard **pieces, uint64_t lo, uint64_t hi);
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};
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struct Branch : Shard {
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Shard *left;
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Shard *right;
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Branch(Shard *l, Shard *r)
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: Shard(
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Kind::Branch,
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l->length + r->length,
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l->lines + r->lines,
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1 + std::max(l->height, r->height)
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),
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left(l), right(r) {
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retain(left);
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retain(right);
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};
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};
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struct Petal : Shard {
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Storage *source;
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uint64_t pos;
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Petal(uint64_t length, uint64_t lines, Storage *source, uint64_t pos)
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: Shard(Kind::Petal, length, lines, 1),
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source(source), pos(pos) {
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source->retain();
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};
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};
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} // namespace bed::internal::vase
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