libisofs-legacy/libisofs/ecma119.h
2006-08-15 20:37:04 +00:00

221 lines
6.0 KiB
C
Executable File

/* vim: set noet ts=8 sts=8 sw=8 : */
/**
* \file ecma119.h
*
* Structures and definitions used for writing an emca119 (ISO9660) compatible
* volume.
*/
#ifndef __ISO_ECMA119
#define __ISO_ECMA119
#include <stdio.h>
#include <sys/time.h>
#include "susp.h"
/**
* Persistent data for writing directories according to the ecma119 standard.
*/
struct dir_write_info
{
struct susp_info susp; /**< \see node_write_info */
struct susp_info self_susp; /**< SUSP data for this directory's
* "." entry.
*/
struct susp_info parent_susp; /**< SUSP data for this directory's
* ".." entry.
*/
int len; /**< The combined length of all children's
* Directory Record lengths. This includes
* the System Use areas.
*/
int susp_len; /**< The combined length of all children's
* SUSP Continuation Areas.
*/
/* the parent/child information prior to relocation */
struct iso_tree_dir *real_parent;
int real_nchildren;
struct iso_tree_dir **real_children;
int real_depth;
/* joliet information */
int joliet_block; /**< The block at which the Joliet version of
* this directory will be written.
*/
int joliet_len; /**< The combined length of all children's
* Joliet Directory Record lengths.
*/
};
/**
* Persistent data for writing files according to the ecma119 standard.
*/
struct file_write_info
{
struct susp_info susp; /**< \see node_write_info */
struct iso_tree_dir *real_me; /**< If this is non-NULL, the file is
* a placeholder for a relocated
* directory and this field points to
* that relocated directory.
*/
};
/**
* The fields in common between file_write_info and dir_write_info.
*/
struct node_write_info
{
struct susp_info susp; /**< The SUSP data for this file. */
};
/**
* The possible states that the ecma119 writer can be in.
*/
enum ecma119_write_state
{
ECMA119_WRITE_BEFORE,
ECMA119_WRITE_SYSTEM_AREA,
ECMA119_WRITE_PRI_VOL_DESC,
ECMA119_WRITE_SUP_VOL_DESC_JOLIET,
ECMA119_WRITE_VOL_DESC_TERMINATOR,
ECMA119_WRITE_L_PATH_TABLE,
ECMA119_WRITE_M_PATH_TABLE,
ECMA119_WRITE_L_PATH_TABLE_JOLIET,
ECMA119_WRITE_M_PATH_TABLE_JOLIET,
ECMA119_WRITE_DIR_RECORDS,
ECMA119_WRITE_DIR_RECORDS_JOLIET,
ECMA119_WRITE_FILES,
ECMA119_WRITE_DONE
};
/**
* Data describing the state of the ecma119 writer. Everything here should be
* considered private!
*/
struct ecma119_write_target
{
struct iso_volset *volset;
int volnum;
time_t now; /**< Time at which writing began. */
int total_size; /**< Total size of the output. This only
* includes the current volume. */
uint32_t vol_space_size;
unsigned int rockridge:1;
unsigned int joliet:1;
unsigned int iso_level:2;
int curblock;
uint16_t block_size;
uint32_t path_table_size;
uint32_t path_table_size_joliet;
uint32_t l_path_table_pos;
uint32_t m_path_table_pos;
uint32_t l_path_table_pos_joliet;
uint32_t m_path_table_pos_joliet;
struct iso_tree_dir **dirlist; /* A pre-order list of directories
* (this is the order in which we write
* out directory records).
*/
struct iso_tree_dir **pathlist; /* A breadth-first list of directories.
* This is used for writing out the path
* tables.
*/
int dirlist_len; /* The length of the previous 2 lists.
*/
struct iso_tree_file **filelist;/* A pre-order list of files with
* non-NULL paths and non-zero sizes.
*/
int filelist_len; /* Length of the previous list. */
int curfile; /* Used as a helper field for writing
out filelist and dirlist */
/* Joliet versions of the above lists. Since Joliet doesn't require
* directory relocation, the order of these list might be different from
* the lists above. */
struct iso_tree_dir **dirlist_joliet;
struct iso_tree_dir **pathlist_joliet;
enum ecma119_write_state state; /* The current state of the writer. */
/* persistent data for the various states. Each struct should not be
* touched except for the writer of the relevant stage. When the writer
* of the relevant stage is finished, it should set all fields to 0.
*/
union
{
struct
{
int blocks;
unsigned char *data;
} path_table;
struct
{
size_t pos; /* The number of bytes we have written
* so far in the current directory.
*/
size_t data_len;/* The number of bytes in the current
* directory.
*/
unsigned char *data; /* The data (combined Directory
* Records and susp_CE areas) of the
* current directory.
*/
int dir; /* The index in dirlist that we are
* currently writing. */
} dir_records;
struct
{
size_t pos; /* The number of bytes we have written
* so far in the current file.
*/
size_t data_len;/* The number of bytes in the currently
* open file.
*/
FILE *fd; /* The currently open file. */
int file; /* The index in filelist that we are
* currently writing. */
} files;
} state_data;
};
/**
* Create a new ecma119_write_target from the given volume number of the
* given volume set.
*
* \pre \p volnum is less than \p volset-\>volset_size.
* \post For each node in the tree, writer_data has been allocated.
* \post The directory heirarchy has been reorganised to be ecma119-compatible.
*/
struct ecma119_write_target *ecma119_target_new(struct iso_volset *volset,
int volnum);
/** Macros to help with casting between node_write_info and dir/file_write_info.
*/
#define DIR_INF(a) ( (struct dir_write_info*) (a) )
#define FILE_INF(a) ( (struct file_write_info*) (a) )
#define NODE_INF(a) ( (struct node_write_info*) (a) )
#define GET_DIR_INF(a) ( (struct dir_write_info*) (a)->writer_data )
#define GET_FILE_INF(a) ( (struct file_write_info*) (a)->writer_data )
#define GET_NODE_INF(a) ( (struct node_write_info*) (a)->writer_data )
#define TARGET_ROOT(t) ( (t)->volset->volume[(t)->volnum]->root )
#define NODE_NAMELEN(n,i) strlen(iso_tree_node_get_name(ISO_NODE(n), i))
#define NODE_JOLLEN(n) ucslen(iso_tree_node_get_name(ISO_NODE(n), \
ISO_NAME_JOLIET))
#endif /* __ISO_ECMA119 */