libisofs-legacy/libisofs/tree.h

177 lines
5.0 KiB
C
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/* vim: set noet ts=8 sts=8 sw=8 : */
/**
* \file tree.h
*
* Declare the structure of a libisofs filesystem tree. The files in this
* tree can come from either the local filesystem or from another .iso image
* (for multisession).
*
* This tree preserves as much information as it can about the files; names
* are stored in wchar_t and we preserve POSIX attributes. This tree does
* *not* include information that is necessary for writing out, for example,
* an ISO level 1 tree. That information will go in a different tree because
* the structure is sufficiently different.
*/
#ifndef LIBISO_TREE_H
#define LIBISO_TREE_H
#include <sys/types.h>
#include <sys/stat.h>
#include <stdint.h>
#include <wchar.h>
#include "libisofs.h"
//enum file_location {
// LIBISO_FILESYS,
// LIBISO_PREVSESSION,
// LIBISO_NONE /**< for files/dirs that were added with
// * iso_tree_add_new_XXX. */
//};
enum hide_node {
LIBISO_HIDE_ON_RR = 1 << 0,
LIBISO_HIDE_ON_JOLIET = 1 << 1
};
/**
* This tells us where to read the data from a file. Either we read from the
* local filesystem or we just point to the block on a previous session.
*/
//struct iso_file_location
//{
// enum file_location type;
// /* union {*/
// char *path; /* in the current locale */
// uint32_t block;
// /* };*/
//};
/**
* A node in the filesystem tree.
*/
struct iso_tree_node
{
/*struct iso_volume *volume; TODO not needed? */
struct iso_tree_node_dir *parent;
char *name;
struct stat attrib; /**< The POSIX attributes of this node as
* documented in "man 2 stat". */
int hide_flags; /**< If the node is to be hidden in RR/ISO or
* Joilet tree */
/*size_t block;*/ /**< The block at which this file will
* reside on disk. We store this here as
* well as in the various mangled trees
* because many different trees might point
* to the same file and they need to share the
* block location. */
};
/**
* A node in the filesystem tree that represents a regular file
*/
struct iso_tree_node_file
{
struct iso_tree_node node;
char *path; /**< the path of the file on local filesystem */
int sort_weight; /**< It sorts the order in which the file data is
* written to the CD image. Higher weighting files
* are written at the beginning of image */
/* when read from an existing ISO image, we need to store the
* block where file contents are written, and not the path.
* Maybe instead of a char *path we will need to go back to
* struct iso_file_location loc;
*/
/* struct iso_file_location loc; */
/**< Only used for regular files and symbolic
* links (ie. files for which we might have to
* copy data). */
};
/**
* A node in the filesystem tree that represents a symbolic link
*/
struct iso_tree_node_symlink
{
struct iso_tree_node node;
char *dest; /**< Destination of the link */
};
/**
* A directory on the filesystem tree
*/
struct iso_tree_node_dir
{
struct iso_tree_node node;
size_t nchildren; /**< The number of children of this
* directory (if this is a directory). */
struct iso_tree_node **children;
};
/**
* Recursively free a directory.
*
* \param root The root of the directory heirarchy to free.
*
* \pre \p root is non-NULL.
*/
void iso_tree_free(struct iso_tree_node *root);
/**
* A function that prints verbose information about a directory.
*
* \param dir The directory about which to print information.
* \param data Unspecified function-dependent data.
* \param spaces The number of spaces to prepend to the output.
*
* \see iso_tree_print_verbose
*/
typedef void (*print_dir_callback) (const struct iso_tree_node *dir,
void *data,
int spaces);
/**
* A function that prints verbose information about a file.
*
* \param dir The file about which to print information.
* \param data Unspecified function-dependent data.
* \param spaces The number of spaces to prepend to the output.
*
* \see iso_tree_print_verbose
*/
typedef void (*print_file_callback) (const struct iso_tree_node *file,
void *data,
int spaces);
/**
* Recursively print a directory heirarchy. For each node in the directory
* heirarchy, call a callback function to print information more verbosely.
*
* \param root The root of the directory heirarchy to print.
* \param dir The callback function to call for each directory in the tree.
* \param file The callback function to call for each file in the tree.
* \param callback_data The data to pass to the callback functions.
* \param spaces The number of spaces to prepend to the output.
*
* \pre \p root is not NULL.
* \pre Neither of the callback functions modifies the directory heirarchy.
*/
void iso_tree_print_verbose(const struct iso_tree_node *root,
print_dir_callback dir,
print_file_callback file,
void *callback_data,
int spaces);
#define ISO_ISDIR(n) S_ISDIR(n->attrib.st_mode)
#define ISO_ISREG(n) S_ISREG(n->attrib.st_mode)
#define ISO_ISLNK(n) S_ISLNK(n->attrib.st_mode)
#endif /* LIBISO_TREE_H */