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/*
* libdpkg - Debian packaging suite library routines
* pkg-array.c - primitives for pkg array handling
*
* Copyright © 1995,1996 Ian Jackson <ijackson@chiark.greenend.org.uk>
* Copyright © 2009-2015 Guillem Jover <guillem@debian.org>
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <compat.h>
#include <string.h>
#include <stdlib.h>
#include <dpkg/dpkg.h>
#include <dpkg/dpkg-db.h>
#include <dpkg/pkg-spec.h>
#include <dpkg/pkg-array.h>
/**
* Initialize a package array from package names.
*
* @param a The array to initialize.
* @param pkg_mapper A function that maps a package name to a package instance.
* @param pkg_names The package names list.
*/
void
pkg_array_init_from_names(struct pkg_array *a, pkg_mapper_func pkg_mapper,
const char **pkg_names)
{
int i = 0;
while (pkg_names[i])
i++;
a->n_pkgs = i;
a->pkgs = m_malloc(sizeof(a->pkgs[0]) * a->n_pkgs);
for (i = 0; pkg_names[i]; i++)
a->pkgs[i] = pkg_mapper(pkg_names[i]);
}
/**
* Initialize a package array from the package database.
*
* @param a The array to initialize.
*/
void
pkg_array_init_from_hash(struct pkg_array *a)
{
struct pkg_hash_iter *iter;
struct pkginfo *pkg;
int i;
a->n_pkgs = pkg_hash_count_pkg();
a->pkgs = m_malloc(sizeof(a->pkgs[0]) * a->n_pkgs);
iter = pkg_hash_iter_new();
for (i = 0; (pkg = pkg_hash_iter_next_pkg(iter)); i++)
a->pkgs[i] = pkg;
pkg_hash_iter_free(iter);
if (i != a->n_pkgs)
internerr("inconsistent state in pkg array: i=%d != npkgs=%d",
i, a->n_pkgs);
}
/**
* Visit each non-NULL package in a package array.
*
* @param a The array to visit.
* @param pkg_visitor The function to visit each item of the array.
* @param pkg_data Data to pass pkg_visit for each package visited.
*/
void
pkg_array_foreach(struct pkg_array *a, pkg_array_visitor_func *pkg_visitor,
void *pkg_data)
{
int i;
for (i = 0; i < a->n_pkgs; i++) {
struct pkginfo *pkg = a->pkgs[i];
if (pkg == NULL)
continue;
pkg_visitor(a, pkg, pkg_data);
}
}
/**
* Sort a package array.
*
* @param a The array to sort.
* @param pkg_sort The function to sort the array.
*/
void
pkg_array_sort(struct pkg_array *a, pkg_sorter_func *pkg_sort)
{
qsort(a->pkgs, a->n_pkgs, sizeof(a->pkgs[0]), pkg_sort);
}
/**
* Destroy a package array.
*
* Frees the allocated memory and resets the members.
*
* @param a The array to destroy.
*/
void
pkg_array_destroy(struct pkg_array *a)
{
a->n_pkgs = 0;
free(a->pkgs);
a->pkgs = NULL;
}
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