268 lines
7.7 KiB
C
Executable File
268 lines
7.7 KiB
C
Executable File
/* -*- indent-tabs-mode: t; tab-width: 8; c-basic-offset: 8; -*- */
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/* vim: set noet ts=8 sts=8 sw=8 : */
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/**
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* \file ecma119.h
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*
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* Structures and definitions used for writing an emca119 (ISO9660) compatible
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* volume.
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*/
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#ifndef LIBISO_ECMA119_H
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#define LIBISO_ECMA119_H
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#include <sys/time.h>
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#include <stdint.h>
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#include <stdio.h> /* for FILE */
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#include <sys/types.h>
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#include "susp.h"
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struct ecma119_tree_node;
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struct joliet_tree_node;
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/**
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* The possible states that the ecma119 writer can be in.
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*/
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enum ecma119_write_state
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{
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ECMA119_WRITE_BEFORE,
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ECMA119_WRITE_SYSTEM_AREA,
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ECMA119_WRITE_PRI_VOL_DESC,
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ECMA119_WRITE_SUP_VOL_DESC_JOLIET,
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ECMA119_WRITE_VOL_DESC_TERMINATOR,
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ECMA119_WRITE_L_PATH_TABLE,
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ECMA119_WRITE_M_PATH_TABLE,
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ECMA119_WRITE_L_PATH_TABLE_JOLIET,
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ECMA119_WRITE_M_PATH_TABLE_JOLIET,
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ECMA119_WRITE_DIR_RECORDS,
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ECMA119_WRITE_DIR_RECORDS_JOLIET,
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ECMA119_WRITE_FILES,
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ECMA119_WRITE_DONE
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};
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/**
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* Data describing the state of the ecma119 writer. Everything here should be
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* considered private!
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*/
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struct ecma119_write_target
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{
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struct ecma119_tree_node *root;
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struct joliet_tree_node *joliet_root;
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struct iso_volset *volset;
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int volnum;
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time_t now; /**< Time at which writing began. */
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off_t total_size; /**< Total size of the output. This only
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* includes the current volume. */
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uint32_t vol_space_size;
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unsigned int rockridge:1;
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unsigned int joliet:1;
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unsigned int iso_level:2;
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int curblock;
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uint16_t block_size;
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uint32_t path_table_size;
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uint32_t path_table_size_joliet;
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uint32_t l_path_table_pos;
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uint32_t m_path_table_pos;
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uint32_t l_path_table_pos_joliet;
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uint32_t m_path_table_pos_joliet;
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uint32_t total_dir_size;
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uint32_t total_dir_size_joliet;
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struct ecma119_tree_node **dirlist;
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/**< A pre-order list of directories
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* (this is the order in which we write
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* out directory records).
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*/
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struct ecma119_tree_node **pathlist;
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/**< A breadth-first list of
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* directories. This is used for
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* writing out the path tables.
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*/
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size_t dirlist_len; /**< The length of the previous 2 lists.
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*/
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struct ecma119_tree_node **filelist;
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/**< A pre-order list of files with
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* non-NULL paths and non-zero sizes.
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*/
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size_t filelist_len; /* Length of the previous list. */
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int curfile; /**< Used as a helper field for writing
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out filelist and dirlist */
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/* Joliet versions of the above lists. Since Joliet doesn't require
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* directory relocation, the order of these lists might be different
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* from the lists above (but they will be the same length).
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*/
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struct joliet_tree_node **dirlist_joliet;
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struct joliet_tree_node **pathlist_joliet;
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enum ecma119_write_state state; /* The current state of the writer. */
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/* Most writers work by
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* 1) making sure state_data is big enough for their data
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* 2) writing _all_ their data into state_data
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* 3) relying on write_data_chunk to write the data block
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* by block.
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*/
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uint8_t *state_data;
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off_t state_data_size;
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off_t state_data_off;
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int state_data_valid;
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/* for writing out files */
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struct state_files {
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off_t pos; /* The number of bytes we have written
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* so far in the current file.
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*/
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off_t data_len;/* The number of bytes in the currently
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* open file.
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*/
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FILE *fd; /* The currently open file. */
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int file; /* The index in filelist that we are
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* currently writing (or about to write). */
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} state_files;
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};
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/**
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* Create a new ecma119_write_target from the given volume number of the
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* given volume set.
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*
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* \pre \p volnum is less than \p volset-\>volset_size.
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* \post For each node in the tree, writer_data has been allocated.
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* \post The directory heirarchy has been reorganised to be ecma119-compatible.
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*/
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struct ecma119_write_target *ecma119_target_new(struct iso_volset *volset,
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int volnum,
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int level,
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int flags);
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#define BP(a,b) [(b) - (a) + 1]
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struct ecma119_pri_vol_desc
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{
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uint8_t vol_desc_type BP(1, 1);
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uint8_t std_identifier BP(2, 6);
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uint8_t vol_desc_version BP(7, 7);
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uint8_t unused1 BP(8, 8);
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uint8_t system_id BP(9, 40);
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uint8_t volume_id BP(41, 72);
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uint8_t unused2 BP(73, 80);
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uint8_t vol_space_size BP(81, 88);
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uint8_t unused3 BP(89, 120);
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uint8_t vol_set_size BP(121, 124);
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uint8_t vol_seq_number BP(125, 128);
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uint8_t block_size BP(129, 132);
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uint8_t path_table_size BP(133, 140);
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uint8_t l_path_table_pos BP(141, 144);
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uint8_t opt_l_path_table_pos BP(145, 148);
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uint8_t m_path_table_pos BP(149, 152);
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uint8_t opt_m_path_table_pos BP(153, 156);
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uint8_t root_dir_record BP(157, 190);
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uint8_t vol_set_id BP(191, 318);
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uint8_t publisher_id BP(319, 446);
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uint8_t data_prep_id BP(447, 574);
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uint8_t application_id BP(575, 702);
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uint8_t copyright_file_id BP(703, 739);
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uint8_t abstract_file_id BP(740, 776);
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uint8_t bibliographic_file_id BP(777, 813);
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uint8_t vol_creation_time BP(814, 830);
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uint8_t vol_modification_time BP(831, 847);
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uint8_t vol_expiration_time BP(848, 864);
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uint8_t vol_effective_time BP(865, 881);
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uint8_t file_structure_version BP(882, 882);
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uint8_t reserved1 BP(883, 883);
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uint8_t app_use BP(884, 1395);
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uint8_t reserved2 BP(1396, 2048);
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};
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struct ecma119_sup_vol_desc
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{
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uint8_t vol_desc_type BP(1, 1);
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uint8_t std_identifier BP(2, 6);
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uint8_t vol_desc_version BP(7, 7);
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uint8_t vol_flags BP(8, 8);
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uint8_t system_id BP(9, 40);
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uint8_t volume_id BP(41, 72);
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uint8_t unused2 BP(73, 80);
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uint8_t vol_space_size BP(81, 88);
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uint8_t esc_sequences BP(89, 120);
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uint8_t vol_set_size BP(121, 124);
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uint8_t vol_seq_number BP(125, 128);
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uint8_t block_size BP(129, 132);
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uint8_t path_table_size BP(133, 140);
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uint8_t l_path_table_pos BP(141, 144);
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uint8_t opt_l_path_table_pos BP(145, 148);
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uint8_t m_path_table_pos BP(149, 152);
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uint8_t opt_m_path_table_pos BP(153, 156);
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uint8_t root_dir_record BP(157, 190);
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uint8_t vol_set_id BP(191, 318);
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uint8_t publisher_id BP(319, 446);
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uint8_t data_prep_id BP(447, 574);
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uint8_t application_id BP(575, 702);
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uint8_t copyright_file_id BP(703, 739);
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uint8_t abstract_file_id BP(740, 776);
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uint8_t bibliographic_file_id BP(777, 813);
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uint8_t vol_creation_time BP(814, 830);
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uint8_t vol_modification_time BP(831, 847);
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uint8_t vol_expiration_time BP(848, 864);
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uint8_t vol_effective_time BP(865, 881);
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uint8_t file_structure_version BP(882, 882);
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uint8_t reserved1 BP(883, 883);
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uint8_t app_use BP(884, 1395);
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uint8_t reserved2 BP(1396, 2048);
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};
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struct ecma119_vol_desc_terminator
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{
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uint8_t vol_desc_type BP(1, 1);
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uint8_t std_identifier BP(2, 6);
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uint8_t vol_desc_version BP(7, 7);
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uint8_t reserved BP(8, 2048);
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};
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struct ecma119_dir_record
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{
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uint8_t len_dr BP(1, 1);
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uint8_t len_xa BP(2, 2);
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uint8_t block BP(3, 10);
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uint8_t length BP(11, 18);
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uint8_t recording_time BP(19, 25);
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uint8_t flags BP(26, 26);
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uint8_t file_unit_size BP(27, 27);
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uint8_t interleave_gap_size BP(28, 28);
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uint8_t vol_seq_number BP(29, 32);
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uint8_t len_fi BP(33, 33);
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uint8_t file_id BP(34, 34); /* 34 to 33+len_fi */
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/* padding field (if len_fi is even) */
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/* system use (len_dr - len_su + 1 to len_dr) */
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};
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struct ecma119_path_table_record
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{
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uint8_t len_di BP(1, 1);
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uint8_t len_xa BP(2, 2);
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uint8_t block BP(3, 6);
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uint8_t parent BP(7, 8);
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uint8_t dir_id BP(9, 9); /* 9 to 8+len_di */
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/* padding field (if len_di is odd) */
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};
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/**
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* A utility function for writers that want to write their data all at once
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* rather than block-by-block. This creates a buffer of size \p size, passes
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* it to the given writer, then hands out block-sized chunks.
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*/
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void
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ecma119_start_chunking(struct ecma119_write_target *t,
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void (*)(struct ecma119_write_target*, uint8_t*),
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off_t size,
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uint8_t *buf);
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#endif /* LIBISO_ECMA119_H */
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