util/cbfstool/bpdt_formats/subpart_hdr_2.c

   1 /* Subpart directory header version 2 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 = 2 */
  12         uint8_t entry_version;          /* Entry version = 1 */
  13         uint8_t length;
  14         uint8_t reserved;
  15         uint8_t name[4];
  16         uint32_t checksum;
  17 } __packed;
  18
  19 static subpart_hdr_ptr subpart_hdr_read(struct buffer *buff)
  20 {
  21         struct subpart_hdr *hdr = malloc(sizeof(*hdr));
  22
  23         if (!hdr)
  24                 return NULL;
  25
  26         READ_MEMBER(buff, hdr->signature);
  27         READ_MEMBER(buff, hdr->count);
  28         READ_MEMBER(buff, hdr->hdr_version);
  29         READ_MEMBER(buff, hdr->entry_version);
  30         READ_MEMBER(buff, hdr->length);
  31         READ_MEMBER(buff, hdr->reserved);
  32         READ_MEMBER(buff, hdr->name);
  33         READ_MEMBER(buff, hdr->checksum);
  34
  35         return hdr;
  36 }
  37
  38 static void subpart_hdr_print(const subpart_hdr_ptr ptr)
  39 {
  40         const struct subpart_hdr *hdr = ptr;
  41
  42         printf("%-25s %.4s\n", "Signature", (const char *)&hdr->signature);
  43         printf("%-25s %-25d\n", "Count", hdr->count);
  44         printf("%-25s %-25d\n", "Header Version", hdr->hdr_version);
  45         printf("%-25s %-25d\n", "Entry Version", hdr->entry_version);
  46         printf("%-25s 0x%-23x\n", "Header Length", hdr->length);
  47         printf("%-25s 0x%-23x\n", "Reserved", hdr->reserved);
  48         printf("%-25s ", "Name");
  49         for (size_t i = 0; i < sizeof(hdr->name); i++)
  50                 printf("%c", hdr->name[i]);
  51         printf("\n");
  52         printf("%-25s 0x%-23x\n", "Checksum", hdr->checksum);
  53 }
  54
  55 static size_t subpart_get_count(const subpart_hdr_ptr ptr)
  56 {
  57         const struct subpart_hdr *hdr = ptr;
  58
  59         return hdr->count;
  60 }
  61
  62 static void subpart_hdr_free(subpart_hdr_ptr ptr)
  63 {
  64         free(ptr);
  65 }
  66
  67 const struct subpart_hdr_ops subpart_hdr_2_ops = {
  68         .read = subpart_hdr_read,
  69         .print = subpart_hdr_print,
  70         .get_entry_count = subpart_get_count,
  71         .free = subpart_hdr_free,
  72 };