Changeset d9bbe45 in mainline for uspace/lib/ext4/libext4_directory_index.c

Timestamp:

2012-01-22T13:22:56Z (12 years ago)

Author:

Frantisek Princ <frantisek.princ@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

fcae007

Parents:

b7e0260

Message:

Refafctorization - principle of locality in variables declaration

File:

• uspace/lib/ext4/libext4_directory_index.c (modified) (18 diffs)

uspace/lib/ext4/libext4_directory_index.c

@@ -130 +130 @@
                 ext4_superblock_t *sb, size_t name_len, const char *name)
 {
-        uint32_t block_size, entry_space;
-        uint16_t limit;
-        ext4_directory_dx_root_t *root;
-
-        root = (ext4_directory_dx_root_t *)root_block->data;
+
+        ext4_directory_dx_root_t *root = (ext4_directory_dx_root_t *)root_block->data;
 
         if (root->info.hash_version != EXT4_HASH_VERSION_TEA &&
@@ -154 +151 @@
         }
 
-        block_size = ext4_superblock_get_block_size(sb);
-
-        entry_space = block_size;
+        uint32_t block_size = ext4_superblock_get_block_size(sb);
+
+        uint32_t entry_space = block_size;
         entry_space -= 2 * sizeof(ext4_directory_dx_dot_entry_t);
         entry_space -= sizeof(ext4_directory_dx_root_info_t);
     entry_space = entry_space / sizeof(ext4_directory_dx_entry_t);
 
-    limit = ext4_directory_dx_countlimit_get_limit((ext4_directory_dx_countlimit_t *)&root->entries);
+    uint16_t limit = ext4_directory_dx_countlimit_get_limit((ext4_directory_dx_countlimit_t *)&root->entries);
     if (limit != entry_space) {
         return EXT4_ERR_BAD_DX_DIR;
@@ -187 +184 @@
 {
         int rc;
-        uint16_t count, limit, entry_space;
-        uint8_t indirect_level;
-        ext4_directory_dx_root_t *root;
+
+        ext4_directory_dx_block_t *tmp_dx_block = dx_blocks;
+
+        ext4_directory_dx_root_t *root = (ext4_directory_dx_root_t *)root_block->data;
+        ext4_directory_dx_entry_t *entries = (ext4_directory_dx_entry_t *)&root->entries;
+
+        uint16_t limit = ext4_directory_dx_countlimit_get_limit((ext4_directory_dx_countlimit_t *)entries);
+        uint8_t indirect_level = ext4_directory_dx_root_info_get_indirect_levels(&root->info);
+
+        block_t *tmp_block = root_block;
         ext4_directory_dx_entry_t *p, *q, *m, *at;
-        ext4_directory_dx_entry_t *entries;
-        block_t *tmp_block = root_block;
-        uint32_t fblock, next_block;
-        ext4_directory_dx_block_t *tmp_dx_block = dx_blocks;
-
-        root = (ext4_directory_dx_root_t *)root_block->data;
-        entries = (ext4_directory_dx_entry_t *)&root->entries;
-
-        limit = ext4_directory_dx_countlimit_get_limit((ext4_directory_dx_countlimit_t *)entries);
-        indirect_level = ext4_directory_dx_root_info_get_indirect_levels(&root->info);
-
         while (true) {
 
-                count = ext4_directory_dx_countlimit_get_count((ext4_directory_dx_countlimit_t *)entries);
+                uint16_t count = ext4_directory_dx_countlimit_get_count((ext4_directory_dx_countlimit_t *)entries);
                 if ((count == 0) || (count > limit)) {
                         return EXT4_ERR_BAD_DX_DIR;
@@ -232 +225 @@
         }
 
-                next_block = ext4_directory_dx_entry_get_block(at);
+                uint32_t next_block = ext4_directory_dx_entry_get_block(at);
 
         indirect_level--;
 
+        uint32_t fblock;
         rc = ext4_filesystem_get_inode_data_block_index(fs, inode, next_block, &fblock);
         if (rc != EOK) {
@@ -249 +243 @@
                 limit = ext4_directory_dx_countlimit_get_limit((ext4_directory_dx_countlimit_t *)entries);
 
-        entry_space = ext4_superblock_get_block_size(fs->superblock) - sizeof(ext4_directory_dx_dot_entry_t);
+        uint16_t entry_space = ext4_superblock_get_block_size(fs->superblock)
+                        - sizeof(ext4_directory_dx_dot_entry_t);
         entry_space = entry_space / sizeof(ext4_directory_dx_entry_t);
 
@@ -266 +261 @@
 
 
-static int ext4_dirextory_dx_find_dir_entry(block_t *block,
+static int ext4_directory_dx_find_dir_entry(block_t *block,
                 ext4_superblock_t *sb, size_t name_len, const char *name,
                 ext4_directory_entry_ll_t **res_entry, aoff64_t *block_offset)
 {
-        ext4_directory_entry_ll_t *dentry;
-        uint16_t dentry_len;
-        uint8_t *addr_limit;
+
         aoff64_t offset = 0;
-
-        dentry = (ext4_directory_entry_ll_t *)block->data;
-        addr_limit = block->data + ext4_superblock_get_block_size(sb);
+        ext4_directory_entry_ll_t *dentry = (ext4_directory_entry_ll_t *)block->data;
+        uint8_t *addr_limit = block->data + ext4_superblock_get_block_size(sb);
 
         while ((uint8_t *)dentry < addr_limit) {
@@ -297 +289 @@
 
                 // Goto next entry
-                dentry_len = ext4_directory_entry_ll_get_entry_length(dentry);
+                uint16_t dentry_len = ext4_directory_entry_ll_get_entry_length(dentry);
 
         if (dentry_len == 0) {
@@ -314 +306 @@
                 ext4_directory_dx_block_t *handle, ext4_directory_dx_block_t *handles)
 {
-        ext4_directory_dx_block_t *p;
-        uint16_t count;
-        uint32_t num_handles;
-        uint32_t current_hash;
-        block_t *block;
-        uint32_t block_addr, block_idx;
-    int rc;
-
-    num_handles = 0;
-    p = handle;
+        int rc;
+
+
+    uint32_t num_handles = 0;
+    ext4_directory_dx_block_t *p = handle;
 
     while (1) {
 
         p->position++;
-        count = ext4_directory_dx_countlimit_get_count((ext4_directory_dx_countlimit_t *)p->entries);
+        uint16_t count = ext4_directory_dx_countlimit_get_count((ext4_directory_dx_countlimit_t *)p->entries);
 
         if (p->position < p->entries + count) {
@@ -342 +329 @@
     }
 
-    current_hash = ext4_directory_dx_entry_get_hash(p->position);
+    uint32_t current_hash = ext4_directory_dx_entry_get_hash(p->position);
 
     if ((hash & 1) == 0) {
@@ -350 +337 @@
     }
 
+
     while (num_handles--) {
 
-        block_idx = ext4_directory_dx_entry_get_block(p->position);
+        uint32_t block_idx = ext4_directory_dx_entry_get_block(p->position);
+        uint32_t block_addr;
         rc = ext4_filesystem_get_inode_data_block_index(fs, inode, block_idx, &block_addr);
         if (rc != EOK) {
@@ -358 +347 @@
         }
 
+        block_t *block;
         rc = block_get(&block, fs->device, block_addr, BLOCK_FLAGS_NONE);
         if (rc != EOK) {
@@ -379 +369 @@
 {
         int rc;
-        uint32_t root_block_addr, leaf_block_addr, leaf_block_idx;
-        aoff64_t block_offset;
-        block_t *root_block, *leaf_block;
-        ext4_hash_info_t hinfo;
-        ext4_directory_entry_ll_t *res_dentry;
-        ext4_directory_dx_block_t dx_blocks[2], *dx_block;
 
         // get direct block 0 (index root)
+        uint32_t root_block_addr;
         rc = ext4_filesystem_get_inode_data_block_index(fs, inode_ref->inode, 0, &root_block_addr);
         if (rc != EOK) {
@@ -392 +377 @@
         }
 
+        block_t *root_block;
         rc = block_get(&root_block, fs->device, root_block_addr, BLOCK_FLAGS_NONE);
         if (rc != EOK) {
@@ -398 +384 @@
         }
 
+        ext4_hash_info_t hinfo;
         rc = ext4_directory_hinfo_init(&hinfo, root_block, fs->superblock, len, name);
         if (rc != EOK) {
@@ -404 +391 @@
         }
 
+        ext4_directory_dx_block_t dx_blocks[2];
+        ext4_directory_dx_block_t *dx_block;
         rc = ext4_directory_dx_get_leaf(&hinfo, fs, inode_ref->inode, root_block, &dx_block, dx_blocks);
         if (rc != EOK) {
@@ -410 +399 @@
         }
 
+
         do {
 
-                leaf_block_idx = ext4_directory_dx_entry_get_block(dx_block->position);
-
+                uint32_t leaf_block_idx = ext4_directory_dx_entry_get_block(dx_block->position);
+                uint32_t leaf_block_addr;
         rc = ext4_filesystem_get_inode_data_block_index(fs, inode_ref->inode, leaf_block_idx, &leaf_block_addr);
         if (rc != EOK) {
@@ -419 +409 @@
         }
 
+        block_t *leaf_block;
                 rc = block_get(&leaf_block, fs->device, leaf_block_addr, BLOCK_FLAGS_NONE);
                 if (rc != EOK) {
@@ -424 +415 @@
                 }
 
-                rc = ext4_dirextory_dx_find_dir_entry(leaf_block, fs->superblock, len, name,
+                aoff64_t block_offset;
+                ext4_directory_entry_ll_t *res_dentry;
+                rc = ext4_directory_dx_find_dir_entry(leaf_block, fs->superblock, len, name,
                                 &res_dentry, &block_offset);