43 lines
1.7 KiB
C
43 lines
1.7 KiB
C
/*
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* ppagecache_helpers.c — pure helpers extracted from ppagecache.c.
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*
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* Only deps: pcrc32c.h (CRC computation) and pfoldersync.h (psync_fileid_t).
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* No psql, no networking, no threading — safe to link into unit tests.
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*/
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#include "ppagecache_helpers.h"
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/* ------------------------------------------------------------------ */
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/* Priority / LRU tier */
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/* ------------------------------------------------------------------ */
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uint8_t ppagecache_compute_page_priority(uint32_t usecnt) {
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if (usecnt >= PPAGECACHE_TIER4_THRESHOLD) return 4;
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if (usecnt >= PPAGECACHE_TIER3_THRESHOLD) return 3;
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if (usecnt >= PPAGECACHE_TIER2_THRESHOLD) return 2;
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if (usecnt >= PPAGECACHE_TIER1_THRESHOLD) return 1;
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return 0;
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}
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/* ------------------------------------------------------------------ */
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/* CRC verification */
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/* ------------------------------------------------------------------ */
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int ppagecache_verify_crc(const void *data, size_t size, uint32_t stored_crc) {
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uint32_t computed = pcrc32c_compute(PSYNC_CRC_INITIAL, data, size);
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return (computed == stored_crc) ? 0 : -1;
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}
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/* ------------------------------------------------------------------ */
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/* Download-URL seam (weak default: no-op) */
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/* ------------------------------------------------------------------ */
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__attribute__((weak))
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char **ppagecache_get_download_urls(psync_fileid_t fileid, uint64_t hash,
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size_t *nout) {
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(void)fileid;
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(void)hash;
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if (nout) *nout = 0;
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return NULL; /* caller falls through to real API */
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}
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