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/*
* pkg - mkpkg database reader (read-only)
* https://rawnix.org
*
* Copyright (c) 2025 zorz@gmx.com
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "pkgdb.h"
#include "paths.h"
static void pkgdb_insert(pkgdb_t *db, const char *name, const char *version)
{
unsigned long hash = hash_djb2(name);
size_t idx = hash % db->bucket_count;
pkgdb_entry_t *e;
e = xmalloc(sizeof(pkgdb_entry_t));
e->key = xstrdup(name);
e->pkg = xmalloc(sizeof(installed_pkg_t));
e->pkg->name = xstrdup(name);
e->pkg->version = xstrdup(version);
e->next = db->buckets[idx];
db->buckets[idx] = e;
db->size++;
}
pkgdb_t *pkgdb_open(const char *root)
{
pkgdb_t *db;
FILE *fp;
char line[MAX_LINE];
char *name = NULL, *version = NULL;
int state = 0; /* 0=name, 1=version, 2=files */
size_t i;
db = xmalloc(sizeof(pkgdb_t));
db->bucket_count = HASH_BUCKETS;
db->size = 0;
db->buckets = xmalloc(db->bucket_count * sizeof(pkgdb_entry_t *));
for (i = 0; i < db->bucket_count; i++)
db->buckets[i] = NULL;
db->path = build_root_path(root, PKGDB_PATH);
fp = fopen(db->path, "r");
if (!fp)
return db; /* empty db is acceptable */
while (fgets(line, sizeof(line), fp)) {
line[strcspn(line, "\n")] = '\0';
if (line[0] == '\0') {
if (name && version) {
pkgdb_insert(db, name, version);
free(name);
free(version);
name = version = NULL;
}
state = 0;
continue;
}
if (state == 0) {
name = xstrdup(line);
state = 1;
} else if (state == 1) {
version = xstrdup(line);
state = 2;
}
/* state 2 = file list, ignored */
}
/* handle last entry (file may lack trailing blank line) */
if (name && version)
pkgdb_insert(db, name, version);
free(name);
free(version);
fclose(fp);
return db;
}
void pkgdb_close(pkgdb_t *db)
{
size_t i;
pkgdb_entry_t *e, *next;
if (!db)
return;
for (i = 0; i < db->bucket_count; i++) {
e = db->buckets[i];
while (e) {
next = e->next;
free(e->key);
free(e->pkg->name);
free(e->pkg->version);
free(e->pkg);
free(e);
e = next;
}
}
free(db->buckets);
free(db->path);
free(db);
}
installed_pkg_t *pkgdb_find(pkgdb_t *db, const char *name)
{
unsigned long hash;
size_t idx;
pkgdb_entry_t *e;
if (!db || !name)
return NULL;
hash = hash_djb2(name);
idx = hash % db->bucket_count;
for (e = db->buckets[idx]; e; e = e->next)
if (strcmp(e->key, name) == 0)
return e->pkg;
return NULL;
}
bool pkgdb_installed(pkgdb_t *db, const char *name)
{
return pkgdb_find(db, name) != NULL;
}
strarray_t *pkgdb_list(pkgdb_t *db)
{
strarray_t *arr;
size_t i;
pkgdb_entry_t *e;
arr = xmalloc(sizeof(strarray_t));
strarray_init(arr);
if (!db)
return arr;
for (i = 0; i < db->bucket_count; i++)
for (e = db->buckets[i]; e; e = e->next)
strarray_add(arr, e->key);
return arr;
}
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