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-rw-r--r--lib/sqfs/data_reader.c68
1 files changed, 22 insertions, 46 deletions
diff --git a/lib/sqfs/data_reader.c b/lib/sqfs/data_reader.c
index af15b9b..2c05942 100644
--- a/lib/sqfs/data_reader.c
+++ b/lib/sqfs/data_reader.c
@@ -9,6 +9,7 @@
#include "sqfs/data_reader.h"
#include "sqfs/compressor.h"
+#include "sqfs/frag_table.h"
#include "sqfs/block.h"
#include "sqfs/error.h"
#include "sqfs/table.h"
@@ -20,7 +21,7 @@
#include <string.h>
struct sqfs_data_reader_t {
- sqfs_fragment_t *frag;
+ sqfs_frag_table_t *frag_tbl;
sqfs_compressor_t *cmp;
sqfs_block_t *data_block;
sqfs_block_t *frag_block;
@@ -29,7 +30,6 @@ struct sqfs_data_reader_t {
sqfs_file_t *file;
- sqfs_u32 num_fragments;
sqfs_u32 current_frag_index;
sqfs_u32 block_size;
@@ -112,19 +112,20 @@ static int precache_data_block(sqfs_data_reader_t *data, sqfs_u64 location,
static int precache_fragment_block(sqfs_data_reader_t *data, size_t idx)
{
+ sqfs_fragment_t ent;
int ret;
if (data->frag_block != NULL && idx == data->current_frag_index)
return 0;
- if (idx >= data->num_fragments)
- return SQFS_ERROR_OUT_OF_BOUNDS;
+ ret = sqfs_frag_table_lookup(data->frag_tbl, idx, &ent);
+ if (ret != 0)
+ return ret;
free(data->frag_block);
data->frag_block = NULL;
- ret = get_block(data, data->frag[idx].start_offset,
- data->frag[idx].size, data->block_size,
+ ret = get_block(data, ent.start_offset, ent.size, data->block_size,
&data->frag_block);
if (ret < 0)
return -1;
@@ -139,69 +140,44 @@ sqfs_data_reader_t *sqfs_data_reader_create(sqfs_file_t *file,
{
sqfs_data_reader_t *data = alloc_flex(sizeof(*data), 1, block_size);
- if (data != NULL) {
- data->file = file;
- data->block_size = block_size;
- data->cmp = cmp;
+ if (data == NULL)
+ return NULL;
+
+ data->frag_tbl = sqfs_frag_table_create(0);
+ if (data->frag_tbl == NULL) {
+ free(data);
+ return NULL;
}
+ data->file = file;
+ data->block_size = block_size;
+ data->cmp = cmp;
return data;
}
int sqfs_data_reader_load_fragment_table(sqfs_data_reader_t *data,
const sqfs_super_t *super)
{
- void *raw_frag;
- size_t size;
- sqfs_u32 i;
int ret;
free(data->frag_block);
- free(data->frag);
-
- data->frag = NULL;
data->frag_block = NULL;
- data->num_fragments = 0;
data->current_frag_index = 0;
- if (super->fragment_entry_count == 0 ||
- (super->flags & SQFS_FLAG_NO_FRAGMENTS) != 0) {
- return 0;
- }
-
- if (super->fragment_table_start >= super->bytes_used)
- return SQFS_ERROR_OUT_OF_BOUNDS;
-
- if (SZ_MUL_OV(sizeof(data->frag[0]), super->fragment_entry_count,
- &size)) {
- return SQFS_ERROR_OVERFLOW;
- }
-
- ret = sqfs_read_table(data->file, data->cmp, size,
- super->fragment_table_start,
- super->directory_table_start,
- super->fragment_table_start, &raw_frag);
- if (ret)
+ ret = sqfs_frag_table_read(data->frag_tbl, data->file,
+ super, data->cmp);
+ if (ret != 0)
return ret;
- data->num_fragments = super->fragment_entry_count;
- data->current_frag_index = super->fragment_entry_count;
- data->frag = raw_frag;
-
- for (i = 0; i < data->num_fragments; ++i) {
- data->frag[i].size = le32toh(data->frag[i].size);
- data->frag[i].start_offset =
- le64toh(data->frag[i].start_offset);
- }
-
+ data->current_frag_index = sqfs_frag_table_get_size(data->frag_tbl);
return 0;
}
void sqfs_data_reader_destroy(sqfs_data_reader_t *data)
{
+ sqfs_frag_table_destroy(data->frag_tbl);
free(data->data_block);
free(data->frag_block);
- free(data->frag);
free(data);
}