From 2ac43d981859bda063e7067371c1cf246c7f81b0 Mon Sep 17 00:00:00 2001 From: David Oberhollenzer Date: Sat, 31 Aug 2019 16:59:50 +0200 Subject: 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 --- lib/sqfs/write_dir.c | 141 --------------------------------------------------- 1 file changed, 141 deletions(-) delete mode 100644 lib/sqfs/write_dir.c (limited to 'lib/sqfs/write_dir.c') 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 - */ -#include "config.h" - -#include "meta_writer.h" -#include "util.h" - -#include -#include -#include -#include -#include - -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; -} -- cgit v1.2.3