util/cbfstool/bpdt_formats/subpart_entry_1.c

   1 /* Subpart directory entry 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 #define SUBPART_OFFSET_SHIFT            0
   9 #define SUBPART_OFFSET_MASK             0x1ffffff
  10 #define SUBPART_OFFSET(x)               (((x) >> SUBPART_OFFSET_SHIFT) & SUBPART_OFFSET_MASK)
  11 #define SUBPART_COMPRESSED_SHIFT        25
  12 #define SUBPART_COMPRESSED_MASK 1
  13 #define SUBPART_COMPRESSED(x)           \
  14         (((x) >> SUBPART_COMPRESSED_SHIFT) & SUBPART_COMPRESSED_MASK)
  15
  16 struct subpart_entry {
  17         uint8_t name[12];
  18         uint32_t offset_bytes;
  19         uint32_t length;
  20         uint32_t rsvd2;
  21 } __packed;
  22
  23 static void subpart_read_entry(struct buffer *buff, struct subpart_entry *e)
  24 {
  25         READ_MEMBER(buff, e->name);
  26         READ_MEMBER(buff, e->offset_bytes);
  27         READ_MEMBER(buff, e->length);
  28         READ_MEMBER(buff, e->rsvd2);
  29 }
  30
  31 static void subpart_print_entry(const struct subpart_entry *e, size_t index)
  32 {
  33         printf("%-25zd%-25.12s0x%-23x%-25c0x%-23x0x%-23x\n", index,
  34                 e->name, SUBPART_OFFSET(e->offset_bytes),
  35                 SUBPART_COMPRESSED(e->offset_bytes) ? 'Y' : 'N',
  36                 e->length, e->rsvd2);
  37 }
  38
  39 static void subpart_print_entries(struct buffer *buff, size_t count)
  40 {
  41         struct subpart_entry *e = malloc(count * sizeof(*e));
  42
  43         if (!e)
  44                 return;
  45
  46         for (size_t i = 0; i < count; i++)
  47                 subpart_read_entry(buff, &e[i]);
  48
  49         printf("%-25s%-25s%-25s%-25s%-25s%-25s\n", "Entry #", "Name", "Offset",
  50                "Huffman Compressed?", "Length", "Rsvd");
  51
  52         printf("====================================================================="
  53                "=====================================================================\n");
  54
  55         for (size_t i = 0; i < count; i++)
  56                 subpart_print_entry(&e[i], i + 1);
  57
  58         printf("====================================================================="
  59                "=====================================================================\n");
  60
  61         free(e);
  62 }
  63
  64 const struct subpart_entry_ops subpart_entry_1_ops = {
  65         .print = subpart_print_entries,
  66 };