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