89 lines
3.3 KiB
C
89 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-3.0-or-later
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#include "../daemon/common.h"
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#include "registry_internals.h"
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// ----------------------------------------------------------------------------
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// REGISTRY_URL
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int registry_url_compare(void *a, void *b) {
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if(((REGISTRY_URL *)a)->hash < ((REGISTRY_URL *)b)->hash) return -1;
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else if(((REGISTRY_URL *)a)->hash > ((REGISTRY_URL *)b)->hash) return 1;
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else return strcmp(((REGISTRY_URL *)a)->url, ((REGISTRY_URL *)b)->url);
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}
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inline REGISTRY_URL *registry_url_index_add(REGISTRY_URL *u) {
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return (REGISTRY_URL *)avl_insert(&(registry.registry_urls_root_index), (avl *)(u));
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}
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inline REGISTRY_URL *registry_url_index_del(REGISTRY_URL *u) {
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return (REGISTRY_URL *)avl_remove(&(registry.registry_urls_root_index), (avl *)(u));
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}
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REGISTRY_URL *registry_url_get(const char *url, size_t urllen) {
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// protection from too big URLs
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if(urllen > registry.max_url_length)
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urllen = registry.max_url_length;
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debug(D_REGISTRY, "Registry: registry_url_get('%s', %zu)", url, urllen);
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char buf[sizeof(REGISTRY_URL) + urllen]; // no need for +1, 1 is already in REGISTRY_URL
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REGISTRY_URL *n = (REGISTRY_URL *)&buf[0];
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n->len = (uint16_t)urllen;
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strncpyz(n->url, url, n->len);
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n->hash = simple_hash(n->url);
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REGISTRY_URL *u = (REGISTRY_URL *)avl_search(&(registry.registry_urls_root_index), (avl *)n);
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if(!u) {
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debug(D_REGISTRY, "Registry: registry_url_get('%s', %zu): allocating %zu bytes", url, urllen, sizeof(REGISTRY_URL) + urllen);
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u = callocz(1, sizeof(REGISTRY_URL) + urllen); // no need for +1, 1 is already in REGISTRY_URL
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// a simple strcpy() should do the job
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// but I prefer to be safe, since the caller specified urllen
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u->len = (uint16_t)urllen;
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strncpyz(u->url, url, u->len);
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u->links = 0;
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u->hash = simple_hash(u->url);
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registry.urls_memory += sizeof(REGISTRY_URL) + urllen; // no need for +1, 1 is already in REGISTRY_URL
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debug(D_REGISTRY, "Registry: registry_url_get('%s'): indexing it", url);
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n = registry_url_index_add(u);
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if(n != u) {
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error("INTERNAL ERROR: registry_url_get(): url '%s' already exists in the registry as '%s'", u->url, n->url);
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freez(u);
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u = n;
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}
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else
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registry.urls_count++;
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}
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return u;
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}
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void registry_url_link(REGISTRY_URL *u) {
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u->links++;
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debug(D_REGISTRY, "Registry: registry_url_link('%s'): URL has now %u links", u->url, u->links);
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}
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void registry_url_unlink(REGISTRY_URL *u) {
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u->links--;
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if(!u->links) {
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debug(D_REGISTRY, "Registry: registry_url_unlink('%s'): No more links for this URL", u->url);
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REGISTRY_URL *n = registry_url_index_del(u);
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if(!n) {
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error("INTERNAL ERROR: registry_url_unlink('%s'): cannot find url in index", u->url);
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}
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else {
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if(n != u) {
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error("INTERNAL ERROR: registry_url_unlink('%s'): deleted different url '%s'", u->url, n->url);
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}
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registry.urls_memory -= sizeof(REGISTRY_URL) + n->len; // no need for +1, 1 is already in REGISTRY_URL
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freez(n);
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}
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}
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else
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debug(D_REGISTRY, "Registry: registry_url_unlink('%s'): URL has %u links left", u->url, u->links);
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}
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