70 lines
2.1 KiB
C
70 lines
2.1 KiB
C
/***
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This file is part of systemd.
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Copyright 2012 Kay Sievers <kay.sievers@vrfy.org>
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include "sparse-endian.h"
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#define HWDB_SIG { 'K', 'S', 'L', 'P', 'H', 'H', 'R', 'H' }
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/* on-disk trie objects */
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_packed_ struct trie_header_f {
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uint8_t signature[8];
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/* version of tool which created the file */
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le64_t tool_version;
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le64_t file_size;
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/* size of structures to allow them to grow */
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le64_t header_size;
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le64_t node_size;
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le64_t child_entry_size;
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le64_t value_entry_size;
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/* offset of the root trie node */
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le64_t nodes_root_off;
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/* size of the nodes and string section */
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le64_t nodes_len;
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le64_t strings_len;
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};
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_packed_ struct trie_node_f {
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/* prefix of lookup string, shared by all children */
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le64_t prefix_off;
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/* size of children entry array appended to the node */
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uint8_t children_count;
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uint8_t padding[7];
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/* size of value entry array appended to the node */
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le64_t values_count;
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};
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/* array of child entries, follows directly the node record */
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_packed_ struct trie_child_entry_f {
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/* index of the child node */
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uint8_t c;
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uint8_t padding[7];
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/* offset of the child node */
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le64_t child_off;
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};
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/* array of value entries, follows directly the node record/child array */
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_packed_ struct trie_value_entry_f {
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le64_t key_off;
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le64_t value_off;
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};
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