stage1 解决重构哈希 nob优化支持头文件缓存以及win下exe缓存
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#ifndef __SPL_FOLD_H__
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#define __SPL_FOLD_H__
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#include "../stage0/include/utils.h"
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/* 通用 intrusive 哈希集合,对应 LLVM FoldingSet 的桶链部分。
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- 节点表由调用方持有,节点自带 next 字段;
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- hash 只用于选择桶(本实现以完整 hash 值作桶 map 的 key),
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相等始终由 eq 回调做结构比较;
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- 只增不删,适合类型 intern。 */
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typedef usize spl_fold_id_t;
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/* 相等返回非零;probe 指向调用方的临时(尚未入表)节点。 */
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typedef int (*spl_fold_eq_fn)(void *ctx, spl_fold_id_t node, const void *probe);
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typedef spl_fold_id_t (*spl_fold_next_fn)(void *ctx, spl_fold_id_t node);
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typedef void (*spl_fold_set_next_fn)(void *ctx, spl_fold_id_t node, spl_fold_id_t next);
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typedef struct {
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MAP(usize, spl_fold_id_t) buckets;
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void *ctx;
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spl_fold_eq_fn eq;
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spl_fold_next_fn next;
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spl_fold_set_next_fn set_next;
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} spl_fold_t;
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void spl_fold_init(spl_fold_t *fold, void *ctx, spl_fold_eq_fn eq, spl_fold_next_fn next,
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spl_fold_set_next_fn set_next);
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void spl_fold_drop(spl_fold_t *fold);
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/* 命中返回已存在的 id,否则返回 0。 */
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spl_fold_id_t spl_fold_find(const spl_fold_t *fold, usize hash, const void *probe);
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/* 把已分配 id 的节点挂到对应桶头。 */
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void spl_fold_insert(spl_fold_t *fold, usize hash, spl_fold_id_t id);
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#endif /* __SPL_FOLD_H__ */
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