src/libsystemd/sd-hwdb/hwdb-internal.h

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2 #pragma once
   3
   4 #include <stdint.h>
   5
   6 #include "sparse-endian.h"
   7
   8 #define HWDB_SIG { 'K', 'S', 'L', 'P', 'H', 'H', 'R', 'H' }
   9
  10 /* on-disk trie objects */
  11 struct trie_header_f {
  12         uint8_t signature[8];
  13
  14         /* version of tool which created the file */
  15         le64_t tool_version;
  16         le64_t file_size;
  17
  18         /* size of structures to allow them to grow */
  19         le64_t header_size;
  20         le64_t node_size;
  21         le64_t child_entry_size;
  22         le64_t value_entry_size;
  23
  24         /* offset of the root trie node */
  25         le64_t nodes_root_off;
  26
  27         /* size of the nodes and string section */
  28         le64_t nodes_len;
  29         le64_t strings_len;
  30 } _packed_;
  31
  32 struct trie_node_f {
  33         /* prefix of lookup string, shared by all children  */
  34         le64_t prefix_off;
  35         /* size of children entry array appended to the node */
  36         uint8_t children_count;
  37         uint8_t padding[7];
  38         /* size of value entry array appended to the node */
  39         le64_t values_count;
  40 } _packed_;
  41
  42 /* array of child entries, follows directly the node record */
  43 struct trie_child_entry_f {
  44         /* index of the child node */
  45         uint8_t c;
  46         uint8_t padding[7];
  47         /* offset of the child node */
  48         le64_t child_off;
  49 } _packed_;
  50
  51 /* array of value entries, follows directly the node record/child array */
  52 struct trie_value_entry_f {
  53         le64_t key_off;
  54         le64_t value_off;
  55 } _packed_;
  56
  57 /* v2 extends v1 with filename and line-number */
  58 struct trie_value_entry2_f {
  59         le64_t key_off;
  60         le64_t value_off;
  61         le64_t filename_off;
  62         le32_t line_number;
  63         le16_t file_priority;
  64         le16_t padding;
  65 } _packed_;