util/cbfstool/bpdt_formats/subpart_hdr_1.c

   1 /* Subpart directory header version 1 support */
   2 /* SPDX-License-Identifier: GPL-2.0-only */
   3
   4 #include <sys/types.h>
   5
   6 #include "cse_serger.h"
   7
   8 struct subpart_hdr {
   9         uint32_t signature;             /* SUBPART_SIGNATURE */
  10         uint32_t count;
  11         uint8_t hdr_version;            /* Header version = 1 */
  12         uint8_t entry_version;          /* Entry version = 1 */
  13         uint8_t length;
  14         uint8_t checksum;
  15         uint8_t name[4];
  16 } __packed;
  17
  18 static void subpart_hdr_print(const subpart_hdr_ptr ptr)
  19 {
  20         const struct subpart_hdr *hdr = ptr;
  21
  22         printf("%-25s %.4s\n", "Signature", (const char *)&hdr->signature);
  23         printf("%-25s %-25d\n", "Count", hdr->count);
  24         printf("%-25s %-25d\n", "Header Version", hdr->hdr_version);
  25         printf("%-25s %-25d\n", "Entry Version", hdr->entry_version);
  26         printf("%-25s 0x%-23x\n", "Header Length", hdr->length);
  27         printf("%-25s 0x%-23x\n", "Checksum", hdr->checksum);
  28         printf("%-25s ", "Name");
  29         for (size_t i = 0; i < sizeof(hdr->name); i++)
  30                 printf("%c", hdr->name[i]);
  31         printf("\n");
  32 }
  33
  34 static subpart_hdr_ptr subpart_hdr_read(struct buffer *buff)
  35 {
  36         struct subpart_hdr *hdr = malloc(sizeof(*hdr));
  37
  38         if (!hdr)
  39                 return NULL;
  40
  41         READ_MEMBER(buff, hdr->signature);
  42         READ_MEMBER(buff, hdr->count);
  43         READ_MEMBER(buff, hdr->hdr_version);
  44         READ_MEMBER(buff, hdr->entry_version);
  45         READ_MEMBER(buff, hdr->length);
  46         READ_MEMBER(buff, hdr->checksum);
  47         READ_MEMBER(buff, hdr->name);
  48
  49         return hdr;
  50 }
  51
  52 static size_t subpart_get_count(const subpart_hdr_ptr ptr)
  53 {
  54         const struct subpart_hdr *hdr = ptr;
  55
  56         return hdr->count;
  57 }
  58
  59 static void subpart_hdr_free(subpart_hdr_ptr ptr)
  60 {
  61         free(ptr);
  62 }
  63
  64 const struct subpart_hdr_ops subpart_hdr_1_ops = {
  65         .read = subpart_hdr_read,
  66         .print = subpart_hdr_print,
  67         .get_entry_count = subpart_get_count,
  68         .free = subpart_hdr_free,
  69 };