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/*
* Copyright (c) 2007 Vreixo Formoso
* 2012 Thomas Schmitt
*
* This file is part of the libisofs project; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version 2
* or later as published by the Free Software Foundation.
* See COPYING file for details.
*/
#ifndef LIBISO_FILESRC_H_
#define LIBISO_FILESRC_H_
#include "libisofs.h"
#include "stream.h"
#include "ecma119.h"
#ifdef HAVE_STDINT_H
#include <stdint.h>
#else
#ifdef HAVE_INTTYPES_H
#include <inttypes.h>
#endif
#endif
/* Abstraction of data file content in the emerging image.
*/
struct Iso_File_Src
{
/* This marks an IsoFileSrc which shall only expose its extent addresses
and sizes but shall not be counted or written by filesrc_writer.
*/
unsigned int no_write :1;
/* Is 1 if the object was already put into the filelist array.
*/
unsigned int taken :1;
unsigned int checksum_index :31;
/** File Sections of the file in the image */
/* Special sections[0].block values while they are relative
before filesrc_writer_compute_data_blocks().
Valid only with .no_write == 0:
0xfffffffe This Iso_File_Src is claimed as external partition.
Others will take care of the content data.
filesrc_writer shall neither count nor write it.
At write_data time it is already converted to
a fileadress between Ecma119Image.ms_block and
Ecma119Image.filesrc_start - 1.
0xffffffff This is the block to which empty files shall point.
Normal data files have relative addresses from 0 to 0xffffffdf.
They cannot be higher, because mspad_writer forces the absolute
filesrc addresses to start at least at 0x20.
*/
struct iso_file_section *sections;
int nsections;
int sort_weight;
IsoStream *stream;
};
int iso_file_src_cmp(const void *n1, const void *n2);
/**
* Create a new IsoFileSrc to get data from a specific IsoFile.
*
* The IsoFileSrc will be cached in a tree to prevent the same file for
* being written several times to image. If you call again this function
* with a node that refers to the same source file, the previously
* created one will be returned. No new IsoFileSrc is created in that case.
*
* @param img
* The image where this file is to be written
* @param file
* The IsoNode we want to write
* @param src
* Will be filled with a pointer to the IsoFileSrc
* @return
* 1 if new object was created, 0 if object existed, < 0 on error
*/
int iso_file_src_create(Ecma119Image *img, IsoFile *file, IsoFileSrc **src);
/**
* Add a given IsoFileSrc to the given image target.
*
* The IsoFileSrc will be cached in a tree to prevent the same file for
* being written several times to image. If you call again this function
* with a node that refers to the same source file, the previously
* created one will be returned.
*
* @param img
* The image where this file is to be written
* @param new
* The IsoFileSrc to add
* @param src
* Will be filled with a pointer to the IsoFileSrc really present in
* the tree. It could be different than new if the same file already
* exists in the tree.
* @return
* 1 on success, 0 if file already exists on tree, < 0 error
*/
int iso_file_src_add(Ecma119Image *img, IsoFileSrc *new, IsoFileSrc **src);
/**
* Free the IsoFileSrc especific data
*/
void iso_file_src_free(void *node);
/**
* Get the size of the file this IsoFileSrc represents
*/
off_t iso_file_src_get_size(IsoFileSrc *file);
/**
* Create a Writer for file contents.
*
* It takes care of written the files in the correct order.
*/
int iso_file_src_writer_create(Ecma119Image *target);
/**
* Determine number of filesrc blocks in the image and compute extent addresses
* relative to start of the file source writer area.
* filesrc_writer_compute_data_blocks() later makes them absolute.
*/
int filesrc_writer_pre_compute(IsoImageWriter *writer);
/**
* Write the content of file into the output stream of t.
* name must be NULL or offer at least PATH_MAX characters of storage.
* buffer must be NULL or offer at least BLOCK_SIZE characters of storage.
* flag is not used yet, submit 0.
*/
int iso_filesrc_write_data(Ecma119Image *t, IsoFileSrc *file,
char *name, char *buffer, int flag);
#endif /*LIBISO_FILESRC_H_*/