From 23fbe14f503c1e98292efc4ba1238adb7dc38d80 Mon Sep 17 00:00:00 2001 From: Tom Gundersen Date: Wed, 3 Dec 2014 17:02:34 +0100 Subject: libsystemd: add sd-hwdb library This is libudev-hwdb, but decoupled from libudev and in the libsystemd style. The core code is unchanged, apart from the following minor changes: - hwdb.bin located in /**/systemd/hwdb/ take preference over the ones located in /**/udev/ - properties are stored internally in an OrderedHashmap, rather than a linked list. - a new API call allows individual properties to be queried directly, rather than iterating over them all - the iteration over properties have been moved inside the library, rather than exposing a list directly - the unused 'flags' parameter was dropped --- src/libsystemd/sd-hwdb/hwdb-internal.h | 70 ++++++++++++++++++++++++++++++++++ 1 file changed, 70 insertions(+) create mode 100644 src/libsystemd/sd-hwdb/hwdb-internal.h (limited to 'src/libsystemd/sd-hwdb/hwdb-internal.h') diff --git a/src/libsystemd/sd-hwdb/hwdb-internal.h b/src/libsystemd/sd-hwdb/hwdb-internal.h new file mode 100644 index 0000000000..fedccdec72 --- /dev/null +++ b/src/libsystemd/sd-hwdb/hwdb-internal.h @@ -0,0 +1,70 @@ +/*** + This file is part of systemd. + + Copyright 2012 Kay Sievers + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see . +***/ +#pragma once + +#include "sparse-endian.h" + +#define HWDB_SIG { 'K', 'S', 'L', 'P', 'H', 'H', 'R', 'H' } + +/* on-disk trie objects */ +struct trie_header_f { + uint8_t signature[8]; + + /* version of tool which created the file */ + le64_t tool_version; + le64_t file_size; + + /* size of structures to allow them to grow */ + le64_t header_size; + le64_t node_size; + le64_t child_entry_size; + le64_t value_entry_size; + + /* offset of the root trie node */ + le64_t nodes_root_off; + + /* size of the nodes and string section */ + le64_t nodes_len; + le64_t strings_len; +} _packed_; + +struct trie_node_f { + /* prefix of lookup string, shared by all children */ + le64_t prefix_off; + /* size of children entry array appended to the node */ + uint8_t children_count; + uint8_t padding[7]; + /* size of value entry array appended to the node */ + le64_t values_count; +} _packed_; + +/* array of child entries, follows directly the node record */ +struct trie_child_entry_f { + /* index of the child node */ + uint8_t c; + uint8_t padding[7]; + /* offset of the child node */ + le64_t child_off; +} _packed_; + +/* array of value entries, follows directly the node record/child array */ +struct trie_value_entry_f { + le64_t key_off; + le64_t value_off; +} _packed_; -- cgit v1.2.3-54-g00ecf