API cleanup: Shuffle declarations around

Move declarations for stuff that is defined in libsquashfs.so into the
public headers and declarations for stuff that isn't, out of there.

Also move the meta reader/writer helper functions to their respective
headers.

Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>

5 files changed, 53 insertions, 57 deletions

diff --git a/include/sqfs/dir.h b/include/sqfs/dir.h
index a1ca69c..6e47fef 100644
--- a/include/sqfs/dir.h
+++ b/include/sqfs/dir.h
@@ -9,6 +9,8 @@
 
 #include "config.h"
 
+#include "sqfs/meta_reader.h"
+
 #include <stdint.h>
 
 #define SQFS_MAX_DIR_ENT 256
@@ -34,4 +36,11 @@ typedef struct {
 	uint8_t name[];
 } sqfs_dir_index_t;
 
+/* Returns 0 on success. Internally prints to stderr on failure */
+int meta_reader_read_dir_header(meta_reader_t *m, sqfs_dir_header_t *hdr);
+
+/* Entry can be freed with a single free() call.
+   The function internally prints to stderr on failure */
+sqfs_dir_entry_t *meta_reader_read_dir_ent(meta_reader_t *m);
+
 #endif /* SQFS_DIR_H */
diff --git a/include/sqfs/inode.h b/include/sqfs/inode.h
index ac809d3..24889b8 100644
--- a/include/sqfs/inode.h
+++ b/include/sqfs/inode.h
@@ -9,6 +9,8 @@
 
 #include "config.h"
 
+#include "sqfs/meta_reader.h"
+
 #include <stdint.h>
 
 typedef enum {
@@ -128,4 +130,12 @@ typedef struct {
 	uint8_t extra[];
 } sqfs_inode_generic_t;
 
+
+/* Inode can be freed with a single free() call.
+   The function internally prints error message to stderr on failure. */
+sqfs_inode_generic_t *meta_reader_read_inode(meta_reader_t *ir,
+					     sqfs_super_t *super,
+					     uint64_t block_start,
+					     size_t offset);
+
 #endif /* SQFS_INODE_H */
diff --git a/include/sqfs/meta_reader.h b/include/sqfs/meta_reader.h
index 0de7401..75071e7 100644
--- a/include/sqfs/meta_reader.h
+++ b/include/sqfs/meta_reader.h
@@ -10,9 +10,7 @@
 #include "config.h"
 
 #include "sqfs/compress.h"
-#include "sqfs/inode.h"
 #include "sqfs/data.h"
-#include "sqfs/dir.h"
 
 typedef struct meta_reader_t meta_reader_t;
 
@@ -37,18 +35,4 @@ void meta_reader_get_position(meta_reader_t *m, uint64_t *block_start,
 /* Returns 0 on success. Internally prints to stderr on failure */
 int meta_reader_read(meta_reader_t *m, void *data, size_t size);
 
-/* Inode can be freed with a single free() call.
-   The function internally prints error message to stderr on failure. */
-sqfs_inode_generic_t *meta_reader_read_inode(meta_reader_t *ir,
-					     sqfs_super_t *super,
-					     uint64_t block_start,
-					     size_t offset);
-
-/* Returns 0 on success. Internally prints to stderr on failure */
-int meta_reader_read_dir_header(meta_reader_t *m, sqfs_dir_header_t *hdr);
-
-/* Entry can be freed with a single free() call.
-   The function internally prints to stderr on failure */
-sqfs_dir_entry_t *meta_reader_read_dir_ent(meta_reader_t *m);
-
 #endif /* META_READER_H */
diff --git a/include/sqfs/meta_writer.h b/include/sqfs/meta_writer.h
index 6c56c93..aeee924 100644
--- a/include/sqfs/meta_writer.h
+++ b/include/sqfs/meta_writer.h
@@ -12,19 +12,6 @@
 #include "sqfs/compress.h"
 #include "sqfs/id_table.h"
 #include "sqfs/data.h"
-#include "fstree.h"
-
-typedef struct {
-	tree_node_t *node;
-	uint32_t block;
-	uint32_t index;
-} idx_ref_t;
-
-typedef struct {
-	size_t num_nodes;
-	size_t max_nodes;
-	idx_ref_t idx_nodes[];
-} dir_index_t;
 
 typedef struct meta_writer_t meta_writer_t;
 
@@ -56,32 +43,4 @@ void meta_writer_reset(meta_writer_t *m);
    returns non-zero on failure. */
 int meta_write_write_to_file(meta_writer_t *m);
 
-/*
-  High level helper function that writes squashfs directory entries to
-  a meta data writer.
-
-  The dir_info_t structure is used to generate the listing and updated
-  accordingly (such as writing back the header position and total size).
-  A directory index is created on the fly and returned in *index.
-  A single free() call is sufficient.
-
-  Returns 0 on success. Prints error messages to stderr on failure.
- */
-int meta_writer_write_dir(meta_writer_t *dm, dir_info_t *dir,
-			  dir_index_t **index);
-
-/*
-  High level helper function to serialize a tree_node_t to a squashfs inode
-  and write it to a meta data writer.
-
-  The inode is written to `im`. If it is a directory node, the directory
-  contents are written to `dm` using meta_writer_write_dir. The given
-  id_table_t is used to store the uid and gid on the fly and write the
-  coresponding indices to the inode structure.
-
-  Returns 0 on success. Prints error messages to stderr on failure.
- */
-int meta_writer_write_inode(fstree_t *fs, id_table_t *idtbl, meta_writer_t *im,
-			    meta_writer_t *dm, tree_node_t *node);
-
 #endif /* META_WRITER_H */
diff --git a/include/sqfs/table.h b/include/sqfs/table.h
new file mode 100644
index 0000000..b1b0c2d
--- /dev/null
+++ b/include/sqfs/table.h
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/*
+ * table.h
+ *
+ * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
+ */
+#ifndef SQFS_TABLE_H
+#define SQFS_TABLE_H
+
+#include "sqfs/compress.h"
+#include "sqfs/super.h"
+
+#include <stdint.h>
+#include <stddef.h>
+
+/*
+  Convenience function for writing meta data to a SquashFS image
+
+  This function internally creates a meta data writer and writes the given
+  'data' blob with 'table_size' bytes to disk, neatly partitioned into meta
+  data blocks. For each meta data block, it remembers the 64 bit start address,
+  writes out all addresses to an uncompressed list and returns the location
+  where the address list starts in 'start'.
+
+  Returns 0 on success. Internally prints error messages to stderr.
+ */
+int sqfs_write_table(int outfd, sqfs_super_t *super, compressor_t *cmp,
+		     const void *data, size_t table_size, uint64_t *start);
+
+void *sqfs_read_table(int fd, compressor_t *cmp, size_t table_size,
+		      uint64_t location, uint64_t lower_limit,
+		      uint64_t upper_limit);
+
+#endif /* SQFS_TABLE_H */