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* grub-core/fs/hfs.c: Remove variable length arrays.

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Reduces hfs.mod by 8 bytes (52 compressed).
This commit is contained in:
Vladimir 'phcoder' Serbinenko 2013-10-20 17:24:19 +02:00
parent 0927e5bdc8
commit 66123940c7
2 changed files with 34 additions and 18 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2013-10-20 Vladimir Serbinenko <phcoder@gmail.com>
* grub-core/fs/hfs.c: Remove variable length arrays.
Reduces hfs.mod by 8 bytes (52 compressed).
2013-10-20 Vladimir Serbinenko <phcoder@gmail.com>
* grub-core/fs/udf.c: Remove variable length arrays.

47
grub-core/fs/hfs.c
View file

@ -665,14 +665,21 @@ grub_hfs_iterate_records (struct grub_hfs_data *data, int type, int idx,
void *hook_arg),
void *hook_arg)
{
int nodesize = type == 0 ? data->cat_size : data->ext_size;
grub_size_t nodesize = type == 0 ? data->cat_size : data->ext_size;
union
union node_union
{
struct grub_hfs_node node;
char rawnode[nodesize];
grub_uint16_t offsets[nodesize / 2];
} node;
char rawnode[0];
grub_uint16_t offsets[0];
} *node;
if (nodesize < sizeof (struct grub_hfs_node))
nodesize = sizeof (struct grub_hfs_node);
node = grub_malloc (nodesize);
if (!node)
return grub_errno;
do
{
@ -689,15 +696,16 @@ grub_hfs_iterate_records (struct grub_hfs_data *data, int type, int idx,
(type == 0) ? GRUB_HFS_CNID_CAT : GRUB_HFS_CNID_EXT,
idx / (data->blksz / nodesize), 0);
blk += (idx % (data->blksz / nodesize));
if (grub_errno)
return grub_errno;
if (grub_disk_read (data->disk, blk, 0,
sizeof (node), &node))
return grub_errno;
if (grub_errno || grub_disk_read (data->disk, blk, 0,
nodesize, node))
{
grub_free (node);
return grub_errno;
}
/* Iterate over all records in this node. */
for (i = 0; i < grub_be_to_cpu16 (node.node.reccnt); i++)
for (i = 0; i < grub_be_to_cpu16 (node->node.reccnt); i++)
{
int pos = (nodesize >> 1) - 1 - i;
struct pointer
@ -705,25 +713,28 @@ grub_hfs_iterate_records (struct grub_hfs_data *data, int type, int idx,
grub_uint8_t keylen;
grub_uint8_t key;
} __attribute__ ((packed)) *pnt;
pnt = (struct pointer *) (grub_be_to_cpu16 (node.offsets[pos])
+ node.rawnode);
pnt = (struct pointer *) (grub_be_to_cpu16 (node->offsets[pos])
+ node->rawnode);
struct grub_hfs_record rec =
{
&pnt->key,
pnt->keylen,
&pnt->key + pnt->keylen +(pnt->keylen + 1) % 2,
nodesize - grub_be_to_cpu16 (node.offsets[pos])
nodesize - grub_be_to_cpu16 (node->offsets[pos])
- pnt->keylen - 1
};
if (node_hook (&node.node, &rec, hook_arg))
return 0;
if (node_hook (&node->node, &rec, hook_arg))
{
grub_free (node);
return 0;
}
}
idx = grub_be_to_cpu32 (node.node.next);
idx = grub_be_to_cpu32 (node->node.next);
} while (idx && this);
grub_free (node);
return 0;
}