summaryrefslogtreecommitdiff
path: root/lib/sqfs/write_dir.c
diff options
context:
space:
mode:
authorDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2019-08-31 16:59:50 +0200
committerDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2019-08-31 17:17:23 +0200
commit2ac43d981859bda063e7067371c1cf246c7f81b0 (patch)
treeca289d2b708a60d13e300cc36ae47839389d26cf /lib/sqfs/write_dir.c
parent9b3d958fb7c37855a63ed75707281c61dc1d44c4 (diff)
Split libsquashfs.a into low seperate libraries
The idea is to make libsquashfs.a independend of libfstree.a, so it becomes a general purpose squashfs manipulation library. All the high level glue code for libfstree.a and utilites that are overly specific with to tools are moved to a seperate librarby. This commit makes the first step by moving the stuff with dependencies on libfstree to a seperate library. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Diffstat (limited to 'lib/sqfs/write_dir.c')
-rw-r--r--lib/sqfs/write_dir.c141
1 files changed, 0 insertions, 141 deletions
diff --git a/lib/sqfs/write_dir.c b/lib/sqfs/write_dir.c
deleted file mode 100644
index 23297ad..0000000
--- a/lib/sqfs/write_dir.c
+++ /dev/null
@@ -1,141 +0,0 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
-/*
- * write_dir.c
- *
- * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
- */
-#include "config.h"
-
-#include "meta_writer.h"
-#include "util.h"
-
-#include <assert.h>
-#include <endian.h>
-#include <stdlib.h>
-#include <string.h>
-#include <stdio.h>
-
-static int get_type(mode_t mode)
-{
- switch (mode & S_IFMT) {
- case S_IFSOCK: return SQFS_INODE_SOCKET;
- case S_IFIFO: return SQFS_INODE_FIFO;
- case S_IFLNK: return SQFS_INODE_SLINK;
- case S_IFBLK: return SQFS_INODE_BDEV;
- case S_IFCHR: return SQFS_INODE_CDEV;
- case S_IFDIR: return SQFS_INODE_DIR;
- case S_IFREG: return SQFS_INODE_FILE;
- default:
- assert(0);
- }
-}
-
-static int dir_index_grow(dir_index_t **index)
-{
- size_t size = sizeof(dir_index_t) + sizeof(idx_ref_t) * 10;
- void *new;
-
- if (*index == NULL) {
- new = calloc(1, size);
- } else {
- if ((*index)->num_nodes < (*index)->max_nodes)
- return 0;
-
- size += sizeof(idx_ref_t) * (*index)->num_nodes;
- new = realloc(*index, size);
- }
-
- if (new == NULL) {
- perror("creating directory index");
- return -1;
- }
-
- *index = new;
- (*index)->max_nodes += 10;
- return 0;
-}
-
-int meta_writer_write_dir(meta_writer_t *dm, dir_info_t *dir,
- dir_index_t **index)
-{
- size_t i, size, count;
- sqfs_dir_header_t hdr;
- sqfs_dir_entry_t ent;
- tree_node_t *c, *d;
- uint16_t *diff_u16;
- uint32_t offset;
- uint64_t block;
- int32_t diff;
-
- c = dir->children;
- dir->size = 0;
-
- meta_writer_get_position(dm, &dir->start_block, &dir->block_offset);
-
- while (c != NULL) {
- meta_writer_get_position(dm, &block, &offset);
-
- count = 0;
- size = (offset + sizeof(hdr)) % SQFS_META_BLOCK_SIZE;
-
- for (d = c; d != NULL; d = d->next) {
- if ((d->inode_ref >> 16) != (c->inode_ref >> 16))
- break;
-
- diff = d->inode_num - c->inode_num;
-
- if (diff > 32767 || diff < -32767)
- break;
-
- size += sizeof(ent) + strlen(c->name);
-
- if (count > 0 && size > SQFS_META_BLOCK_SIZE)
- break;
-
- count += 1;
- }
-
- if (count > SQFS_MAX_DIR_ENT)
- count = SQFS_MAX_DIR_ENT;
-
- if (dir_index_grow(index))
- return -1;
-
- meta_writer_get_position(dm, &block, &offset);
-
- i = (*index)->num_nodes++;
- (*index)->idx_nodes[i].node = c;
- (*index)->idx_nodes[i].block = block;
- (*index)->idx_nodes[i].index = dir->size;
-
- hdr.count = htole32(count - 1);
- hdr.start_block = htole32(c->inode_ref >> 16);
- hdr.inode_number = htole32(c->inode_num);
- dir->size += sizeof(hdr);
-
- if (meta_writer_append(dm, &hdr, sizeof(hdr)))
- return -1;
-
- d = c;
-
- for (i = 0; i < count; ++i) {
- ent.inode_diff = c->inode_num - d->inode_num;
-
- diff_u16 = (uint16_t *)&ent.inode_diff;
- *diff_u16 = htole16(*diff_u16);
-
- ent.offset = htole16(c->inode_ref & 0x0000FFFF);
- ent.type = htole16(get_type(c->mode));
- ent.size = htole16(strlen(c->name) - 1);
- dir->size += sizeof(ent) + strlen(c->name);
-
- if (meta_writer_append(dm, &ent, sizeof(ent)))
- return -1;
- if (meta_writer_append(dm, c->name, strlen(c->name)))
- return -1;
-
- c = c->next;
- }
- }
- return 0;
-}