/*
 * Copyright (c) 2007 Vreixo Formoso
 * Copyright (c) 2007 Mario Danic
 * Copyright (c) 2009 - 2011 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.
 */

#ifdef HAVE_CONFIG_H
#include "../config.h"
#endif

/*
   Use the copy of the struct burn_source definition in libisofs.h
*/
#define LIBISOFS_WITHOUT_LIBBURN yes
#include "libisofs.h"

#include "ecma119.h"
#include "joliet.h"
#include "iso1999.h"
#include "eltorito.h"
#include "ecma119_tree.h"
#include "filesrc.h"
#include "image.h"
#include "writer.h"
#include "messages.h"
#include "rockridge.h"
#include "util.h"
#include "system_area.h"
#include "md5.h"

#include <ctype.h>
#include <stdlib.h>
#include <time.h>
#include <string.h>
#include <locale.h>
#include <langinfo.h>
#include <stdio.h>

#ifdef Xorriso_standalonE

#ifdef Xorriso_with_libjtE
#include "../libjte/libjte.h"
#endif

#else

#ifdef Libisofs_with_libjtE
#include <libjte/libjte.h>
#endif

#endif /* ! Xorriso_standalonE */

/*
 * TODO #00011 : guard against bad path table usage with more than 65535 dirs
 * image with more than 65535 directories have path_table related problems
 * due to 16 bits parent id. Note that this problem only affects to folders
 * that are parent of another folder.
 */

static
void ecma119_image_free(Ecma119Image *t)
{
    size_t i;

    if (t == NULL)
        return;

    if (t->refcount > 1) {
        t->refcount--;
        return;
    }

    if (t->root != NULL)
        ecma119_node_free(t->root);
    if (t->image != NULL)
        iso_image_unref(t->image);
    if (t->files != NULL)
        iso_rbtree_destroy(t->files, iso_file_src_free);
    if (t->buffer != NULL)
        iso_ring_buffer_free(t->buffer);

    for (i = 0; i < t->nwriters; ++i) {
        IsoImageWriter *writer = t->writers[i];
        writer->free_data(writer);
        free(writer);
    }
    if (t->input_charset != NULL)
        free(t->input_charset);
    if (t->output_charset != NULL)
        free(t->output_charset);
    if (t->bootsrc != NULL)
        free(t->bootsrc);
    if (t->system_area_data != NULL)
        free(t->system_area_data);
    if (t->checksum_ctx != NULL) { /* dispose checksum context */
        char md5[16];
        iso_md5_end(&(t->checksum_ctx), md5);
    }
    if (t->checksum_buffer != NULL)
        free(t->checksum_buffer);
    if (t->writers != NULL)
        free(t->writers);
    if (t->partition_root != NULL)
        ecma119_node_free(t->partition_root);
    for (i = 0; i < ISO_MAX_PARTITIONS; i++)
        if (t->appended_partitions[i] != NULL)
            free(t->appended_partitions[i]);

    free(t);
}

static int show_chunk_to_jte(Ecma119Image *target, char *buf, int count)
{

#ifdef Libisofs_with_libjtE

    int ret;

    if (target->libjte_handle == NULL)
        return ISO_SUCCESS;
    ret = libjte_show_data_chunk(target->libjte_handle, buf, count, 1); 
    if (ret <= 0) {
        iso_libjte_forward_msgs(target->libjte_handle,
                                target->image->id, ISO_LIBJTE_FILE_FAILED, 0);
        return ISO_LIBJTE_FILE_FAILED;
    }

#endif /* Libisofs_with_libjtE */

    return ISO_SUCCESS;
}

/**
 * Check if we should add version number ";" to the given node name.
 */
static
int need_version_number(Ecma119Image *t, Ecma119Node *n)
{
    if ((t->omit_version_numbers & 1) || t->untranslated_name_len > 0) {
        return 0;
    }
    if (n->type == ECMA119_DIR || n->type == ECMA119_PLACEHOLDER) {
        return 0;
    } else {
        return 1;
    }
}

/**
 * Compute the size of a directory entry for a single node
 */
static
size_t calc_dirent_len(Ecma119Image *t, Ecma119Node *n)
{
    int ret = n->iso_name ? strlen(n->iso_name) + 33 : 34;
    if (need_version_number(t, n)) {
        ret += 2; /* take into account version numbers */
    }
    if (ret % 2)
        ret++;
    return ret;
}

/**
 * Computes the total size of all directory entries of a single dir,
 * acording to ECMA-119 6.8.1.1
 *
 * This also take into account the size needed for RR entries and
 * SUSP continuation areas (SUSP, 5.1).
 *
 * @param ce
 *      Will be filled with the size needed for Continuation Areas
 * @return
 *      The size needed for all dir entries of the given dir, without
 *      taking into account the continuation areas.
 */
static
size_t calc_dir_size(Ecma119Image *t, Ecma119Node *dir, size_t *ce)
{
    size_t i, len;
    size_t ce_len = 0;

    /* size of "." and ".." entries */
    len = 34 + 34;
    if (t->rockridge) {
        len += rrip_calc_len(t, dir, 1, 34, &ce_len);
        *ce += ce_len;
        len += rrip_calc_len(t, dir, 2, 34, &ce_len);
        *ce += ce_len;
    }

    for (i = 0; i < dir->info.dir->nchildren; ++i) {
        size_t remaining;
        int section, nsections;
        Ecma119Node *child = dir->info.dir->children[i];

        nsections = (child->type == ECMA119_FILE) ? child->info.file->nsections : 1;
        for (section = 0; section < nsections; ++section) {
            size_t dirent_len = calc_dirent_len(t, child);
            if (t->rockridge) {
                dirent_len += rrip_calc_len(t, child, 0, dirent_len, &ce_len);
                *ce += ce_len;
            }
            remaining = BLOCK_SIZE - (len % BLOCK_SIZE);
            if (dirent_len > remaining) {
                /* child directory entry doesn't fit on block */
                len += remaining + dirent_len;
            } else {
                len += dirent_len;
            }
        }
    }

    /*
     * The size of a dir is always a multiple of block size, as we must add
     * the size of the unused space after the last directory record
     * (ECMA-119, 6.8.1.3)
     */
    len = ROUND_UP(len, BLOCK_SIZE);

    /* cache the len */
    dir->info.dir->len = len;
    return len;
}

static
void calc_dir_pos(Ecma119Image *t, Ecma119Node *dir)
{
    size_t i, len;
    size_t ce_len = 0;

    t->ndirs++;
    dir->info.dir->block = t->curblock;
    len = calc_dir_size(t, dir, &ce_len);
    t->curblock += DIV_UP(len, BLOCK_SIZE);
    if (t->rockridge) {
        t->curblock += DIV_UP(ce_len, BLOCK_SIZE);
    }
    for (i = 0; i < dir->info.dir->nchildren; i++) {
        Ecma119Node *child = dir->info.dir->children[i];
        if (child->type == ECMA119_DIR) {
            calc_dir_pos(t, child);
        }
    }
}

/**
 * Compute the length of the path table, in bytes.
 */
static
uint32_t calc_path_table_size(Ecma119Node *dir)
{
    uint32_t size;
    size_t i;

    /* size of path table for this entry */
    size = 8;
    size += dir->iso_name ? strlen(dir->iso_name) : 1;
    size += (size % 2);

    /* and recurse */
    for (i = 0; i < dir->info.dir->nchildren; i++) {
        Ecma119Node *child = dir->info.dir->children[i];
        if (child->type == ECMA119_DIR) {
            size += calc_path_table_size(child);
        }
    }
    return size;
}

static
int ecma119_writer_compute_data_blocks(IsoImageWriter *writer)
{
    Ecma119Image *target;
    uint32_t path_table_size;
    size_t ndirs;

    if (writer == NULL) {
        return ISO_ASSERT_FAILURE;
    }

    target = writer->target;

    /* compute position of directories */
    iso_msg_debug(target->image->id, "Computing position of dir structure");
    target->ndirs = 0;
    calc_dir_pos(target, target->root);

    /* compute length of pathlist */
    iso_msg_debug(target->image->id, "Computing length of pathlist");
    path_table_size = calc_path_table_size(target->root);

    /* compute location for path tables */
    target->l_path_table_pos = target->curblock;
    target->curblock += DIV_UP(path_table_size, BLOCK_SIZE);
    target->m_path_table_pos = target->curblock;
    target->curblock += DIV_UP(path_table_size, BLOCK_SIZE);
    target->path_table_size = path_table_size;

    if (target->md5_session_checksum) {
        /* Account for first tree checksum tag */
        target->checksum_tree_tag_pos = target->curblock;
        target->curblock++;
    }

    if (target->partition_offset > 0) {
        /* Take into respect the second directory tree */
        ndirs = target->ndirs;
        target->ndirs = 0;
        calc_dir_pos(target, target->partition_root);
        if (target->ndirs != ndirs) {
            iso_msg_submit(target->image->id, ISO_ASSERT_FAILURE, 0,
                    "Number of directories differs in ECMA-119 partiton_tree");
            return ISO_ASSERT_FAILURE;
	}
        /* Take into respect the second set of path tables */
        path_table_size = calc_path_table_size(target->partition_root);
        target->partition_l_table_pos = target->curblock;
        target->curblock += DIV_UP(path_table_size, BLOCK_SIZE);
        target->partition_m_table_pos = target->curblock;
        target->curblock += DIV_UP(path_table_size, BLOCK_SIZE);

        /* >>> TWINTREE: >>> For now, checksum tags are only for the
                             image start and not for the partition */;

    }

    target->tree_end_block = target->curblock;

    return ISO_SUCCESS;
}

/**
 * Write a single directory record (ECMA-119, 9.1)
 *
 * @param file_id
 *     if >= 0, we use it instead of the filename (for "." and ".." entries).
 * @param len_fi
 *     Computed length of the file identifier. Total size of the directory
 *     entry will be len + 33 + padding if needed (ECMA-119, 9.1.12)
 * @param info
 *     SUSP entries for the given directory record. It will be NULL for the
 *     root directory record in the PVD (ECMA-119, 8.4.18) (in order to
 *     distinguish it from the "." entry in the root directory)
 */
static
void write_one_dir_record(Ecma119Image *t, Ecma119Node *node, int file_id,
                          uint8_t *buf, size_t len_fi, struct susp_info *info,
                          int extent)
{
    uint32_t len;
    uint32_t block;
    uint8_t len_dr; /*< size of dir entry without SUSP fields */
    int multi_extend = 0;
    uint8_t *name = (file_id >= 0) ? (uint8_t*)&file_id
            : (uint8_t*)node->iso_name;

    struct ecma119_dir_record *rec = (struct ecma119_dir_record*)buf;
    IsoNode *iso;

    len_dr = 33 + len_fi + (len_fi % 2 ? 0 : 1);

    memcpy(rec->file_id, name, len_fi);

    if (need_version_number(t, node)) {
        len_dr += 2;
        rec->file_id[len_fi++] = ';';
        rec->file_id[len_fi++] = '1';
    }

    if (node->type == ECMA119_DIR) {
        /* use the cached length */
        len = node->info.dir->len;
        block = node->info.dir->block;
    } else if (node->type == ECMA119_FILE) {
        block = node->info.file->sections[extent].block;
        len = node->info.file->sections[extent].size;
        multi_extend = (node->info.file->nsections - 1 == extent) ? 0 : 1;
    } else {
        /*
         * for nodes other than files and dirs, we set len to 0, and
         * the content block address to a dummy value.
         */
        len = 0;
        if (! t->old_empty)
            block = t->empty_file_block;
        else
            block = 0;
    }

    /*
     * For ".." entry we need to write the parent info!
     */
    if (file_id == 1 && node->parent)
        node = node->parent;

    rec->len_dr[0] = len_dr + (info != NULL ? info->suf_len : 0);
    iso_bb(rec->block, block - t->eff_partition_offset, 4);
    iso_bb(rec->length, len, 4);
    if (t->dir_rec_mtime) {
        iso= node->node;
        iso_datetime_7(rec->recording_time,
                       t->replace_timestamps ? t->timestamp : iso->mtime,
                       t->always_gmt);
    } else {
        iso_datetime_7(rec->recording_time, t->now, t->always_gmt);
    }
    rec->flags[0] = ((node->type == ECMA119_DIR) ? 2 : 0) | (multi_extend ? 0x80 : 0);
    iso_bb(rec->vol_seq_number, (uint32_t) 1, 2);
    rec->len_fi[0] = len_fi;

    /*
     * and finally write the SUSP fields.
     */
    if (info != NULL) {
        rrip_write_susp_fields(t, info, buf + len_dr);
    }
}

static
char *get_relaxed_vol_id(Ecma119Image *t, const char *name)
{
    int ret;
    if (name == NULL) {
        return NULL;
    }
    if (strcmp(t->input_charset, t->output_charset)) {
        /* charset conversion needed */
        char *str;
        ret = strconv(name, t->input_charset, t->output_charset, &str);
        if (ret == ISO_SUCCESS) {
            return str;
        }
        iso_msg_submit(t->image->id, ISO_FILENAME_WRONG_CHARSET, ret,
                  "Charset conversion error. Cannot convert from %s to %s",
                  t->input_charset, t->output_charset);
    }
    return strdup(name);
}

/**
 * Write the Primary Volume Descriptor (ECMA-119, 8.4)
 */
static
int ecma119_writer_write_vol_desc(IsoImageWriter *writer)
{
    IsoImage *image;
    Ecma119Image *t;
    struct ecma119_pri_vol_desc vol;
    int i;
    char *vol_id, *pub_id, *data_id, *volset_id;
    char *system_id, *application_id, *copyright_file_id;
    char *abstract_file_id, *biblio_file_id;

    if (writer == NULL) {
        return ISO_ASSERT_FAILURE;
    }

    t = writer->target;
    image = t->image;

    iso_msg_debug(image->id, "Write Primary Volume Descriptor");

    memset(&vol, 0, sizeof(struct ecma119_pri_vol_desc));

    if (t->relaxed_vol_atts) {
        vol_id = get_relaxed_vol_id(t, image->volume_id);
        volset_id = get_relaxed_vol_id(t, image->volset_id);
    } else {
        str2d_char(t->input_charset, image->volume_id, &vol_id);
        str2d_char(t->input_charset, image->volset_id, &volset_id);
    }
    str2a_char(t->input_charset, image->publisher_id, &pub_id);
    str2a_char(t->input_charset, image->data_preparer_id, &data_id);
    str2a_char(t->input_charset, image->system_id, &system_id);
    str2a_char(t->input_charset, image->application_id, &application_id);
    str2d_char(t->input_charset, image->copyright_file_id, &copyright_file_id);
    str2d_char(t->input_charset, image->abstract_file_id, &abstract_file_id);
    str2d_char(t->input_charset, image->biblio_file_id, &biblio_file_id);

    vol.vol_desc_type[0] = 1;
    memcpy(vol.std_identifier, "CD001", 5);
    vol.vol_desc_version[0] = 1;
    strncpy_pad((char*)vol.system_id, system_id, 32);
    strncpy_pad((char*)vol.volume_id, vol_id, 32);
    iso_bb(vol.vol_space_size, t->vol_space_size  - t->eff_partition_offset,
           4);
    iso_bb(vol.vol_set_size, (uint32_t) 1, 2);
    iso_bb(vol.vol_seq_number, (uint32_t) 1, 2);
    iso_bb(vol.block_size, (uint32_t) BLOCK_SIZE, 2);
    iso_bb(vol.path_table_size, t->path_table_size, 4);

    if (t->eff_partition_offset > 0) {
        /* Point to second tables and second root */
        iso_lsb(vol.l_path_table_pos,
                t->partition_l_table_pos - t->eff_partition_offset, 4);
        iso_msb(vol.m_path_table_pos,
                t->partition_m_table_pos - t->eff_partition_offset, 4);
        write_one_dir_record(t, t->partition_root, 0,
                             vol.root_dir_record, 1, NULL, 0);
    } else {
        iso_lsb(vol.l_path_table_pos, t->l_path_table_pos, 4);
        iso_msb(vol.m_path_table_pos, t->m_path_table_pos, 4);
        write_one_dir_record(t, t->root, 0, vol.root_dir_record, 1, NULL, 0);
    }

    strncpy_pad((char*)vol.vol_set_id, volset_id, 128);
    strncpy_pad((char*)vol.publisher_id, pub_id, 128);
    strncpy_pad((char*)vol.data_prep_id, data_id, 128);

    strncpy_pad((char*)vol.application_id, application_id, 128);
    strncpy_pad((char*)vol.copyright_file_id, copyright_file_id, 37);
    strncpy_pad((char*)vol.abstract_file_id, abstract_file_id, 37);
    strncpy_pad((char*)vol.bibliographic_file_id, biblio_file_id, 37);

    if (t->vol_uuid[0]) {
        for(i = 0; i < 16; i++)
            if(t->vol_uuid[i] < '0' || t->vol_uuid[i] > '9')
        break;
            else
                vol.vol_creation_time[i] = t->vol_uuid[i];
       for(; i < 16; i++)
           vol.vol_creation_time[i] = '1';
       vol.vol_creation_time[16] = 0;
    } else if (t->vol_creation_time > 0)
        iso_datetime_17(vol.vol_creation_time, t->vol_creation_time,
                        t->always_gmt);
    else
        iso_datetime_17(vol.vol_creation_time, t->now, t->always_gmt);

    if (t->vol_uuid[0]) {
        for(i = 0; i < 16; i++)
            if(t->vol_uuid[i] < '0' || t->vol_uuid[i] > '9')
        break;
            else
                vol.vol_modification_time[i] = t->vol_uuid[i];
       for(; i < 16; i++)
           vol.vol_modification_time[i] = '1';
       vol.vol_modification_time[16] = 0;
    } else if (t->vol_modification_time > 0)
        iso_datetime_17(vol.vol_modification_time, t->vol_modification_time,
                        t->always_gmt);
    else
        iso_datetime_17(vol.vol_modification_time, t->now, t->always_gmt);

    if (t->vol_expiration_time > 0)
        iso_datetime_17(vol.vol_expiration_time, t->vol_expiration_time,
                        t->always_gmt);

    if (t->vol_effective_time > 0)
        iso_datetime_17(vol.vol_effective_time, t->vol_effective_time,
                        t->always_gmt);

    vol.file_structure_version[0] = 1;

    free(vol_id);
    free(volset_id);
    free(pub_id);
    free(data_id);
    free(system_id);
    free(application_id);
    free(copyright_file_id);
    free(abstract_file_id);
    free(biblio_file_id);

    /* Finally write the Volume Descriptor */
    return iso_write(t, &vol, sizeof(struct ecma119_pri_vol_desc));
}

static
int write_one_dir(Ecma119Image *t, Ecma119Node *dir, Ecma119Node *parent)
{
    int ret;
    uint8_t *buffer = NULL;
    size_t i;
    size_t fi_len, len;
    struct susp_info info;

    /* buf will point to current write position on buffer */
    uint8_t *buf;

    LIBISO_ALLOC_MEM(buffer, uint8_t, BLOCK_SIZE);
    buf = buffer;

    /*
     * set susp_info to 0's, this way code for both plain ECMA-119 and
     * RR is very similar
     */
    memset(&info, 0, sizeof(struct susp_info));
    if (t->rockridge) {
        /* initialize the ce_block, it might be needed */
        info.ce_block = dir->info.dir->block + DIV_UP(dir->info.dir->len,
                                                      BLOCK_SIZE);
    }

    /* write the "." and ".." entries first */
    if (t->rockridge) {
        ret = rrip_get_susp_fields(t, dir, 1, 34, &info);
        if (ret < 0) {
            goto ex;
        }
    }
    len = 34 + info.suf_len;
    write_one_dir_record(t, dir, 0, buf, 1, &info, 0);
    buf += len;

    if (t->rockridge) {
        ret = rrip_get_susp_fields(t, dir, 2, 34, &info);
        if (ret < 0) {
            goto ex;
        }
    }
    len = 34 + info.suf_len;
    write_one_dir_record(t, parent, 1, buf, 1, &info, 0);
    buf += len;

    for (i = 0; i < dir->info.dir->nchildren; i++) {
        int section, nsections;
        Ecma119Node *child = dir->info.dir->children[i];

        fi_len = strlen(child->iso_name);

        nsections = (child->type == ECMA119_FILE) ? child->info.file->nsections : 1;
        for (section = 0; section < nsections; ++section) {

            /* compute len of directory entry */
            len = fi_len + 33 + (fi_len % 2 ? 0 : 1);
            if (need_version_number(t, child)) {
                len += 2;
            }

            /* get the SUSP fields if rockridge is enabled */
            if (t->rockridge) {
                ret = rrip_get_susp_fields(t, child, 0, len, &info);
                if (ret < 0) {
                    goto ex;
                }
                len += info.suf_len;
            }

            if ( (buf + len - buffer) > BLOCK_SIZE) {
                /* dir doesn't fit in current block */
                ret = iso_write(t, buffer, BLOCK_SIZE);
                if (ret < 0) {
                    goto ex;
                }
                memset(buffer, 0, BLOCK_SIZE);
                buf = buffer;
            }
            /* write the directory entry in any case */
            write_one_dir_record(t, child, -1, buf, fi_len, &info, section);
            buf += len;
        }
    }

    /* write the last block */
    ret = iso_write(t, buffer, BLOCK_SIZE);
    if (ret < 0) {
        goto ex;
    }

    /* write the Continuation Area if needed */
    if (info.ce_len > 0) {
        ret = rrip_write_ce_fields(t, &info);
    }

ex:;
    LIBISO_FREE_MEM(buffer);
    return ret;
}

static
int write_dirs(Ecma119Image *t, Ecma119Node *root, Ecma119Node *parent)
{
    int ret;
    size_t i;

    /* write all directory entries for this dir */
    ret = write_one_dir(t, root, parent);
    if (ret < 0) {
        return ret;
    }

    /* recurse */
    for (i = 0; i < root->info.dir->nchildren; i++) {
        Ecma119Node *child = root->info.dir->children[i];
        if (child->type == ECMA119_DIR) {
            ret = write_dirs(t, child, root);
            if (ret < 0) {
                return ret;
            }
        }
    }
    return ISO_SUCCESS;
}

static
int write_path_table(Ecma119Image *t, Ecma119Node **pathlist, int l_type)
{
    size_t i, len;
    uint8_t buf[64]; /* 64 is just a convenient size larger enought */
    struct ecma119_path_table_record *rec;
    void (*write_int)(uint8_t*, uint32_t, int);
    Ecma119Node *dir;
    uint32_t path_table_size;
    int parent = 0;
    int ret= ISO_SUCCESS;
    uint8_t *zeros = NULL;

    path_table_size = 0;
    write_int = l_type ? iso_lsb : iso_msb;

    for (i = 0; i < t->ndirs; i++) {
        dir = pathlist[i];

        /* find the index of the parent in the table */
        while ((i) && pathlist[parent] != dir->parent) {
            parent++;
        }

        /* write the Path Table Record (ECMA-119, 9.4) */
        memset(buf, 0, 64);
        rec = (struct ecma119_path_table_record*) buf;
        rec->len_di[0] = dir->parent ? (uint8_t) strlen(dir->iso_name) : 1;
        rec->len_xa[0] = 0;
        write_int(rec->block, dir->info.dir->block - t->eff_partition_offset,
                  4);
        write_int(rec->parent, parent + 1, 2);
        if (dir->parent) {
            memcpy(rec->dir_id, dir->iso_name, rec->len_di[0]);
        }
        len = 8 + rec->len_di[0] + (rec->len_di[0] % 2);
        ret = iso_write(t, buf, len);
        if (ret < 0) {
            /* error */
            goto ex;
        }
        path_table_size += len;
    }

    /* we need to fill the last block with zeros */
    path_table_size %= BLOCK_SIZE;
    if (path_table_size) {
        len = BLOCK_SIZE - path_table_size;
        LIBISO_ALLOC_MEM(zeros, uint8_t, len);
        ret = iso_write(t, zeros, len);
    }
ex:;
    LIBISO_FREE_MEM(zeros);
    return ret;
}

static
int write_path_tables(Ecma119Image *t)
{
    int ret;
    size_t i, j, cur;
    Ecma119Node **pathlist;

    iso_msg_debug(t->image->id, "Writing ISO Path tables");

    /* allocate temporal pathlist */
    pathlist = malloc(sizeof(void*) * t->ndirs);
    if (pathlist == NULL) {
        return ISO_OUT_OF_MEM;
    }

    if (t->eff_partition_offset > 0) {
        pathlist[0] = t->partition_root;
    } else {
        pathlist[0] = t->root;
    }
    cur = 1;

    for (i = 0; i < t->ndirs; i++) {
        Ecma119Node *dir = pathlist[i];
        for (j = 0; j < dir->info.dir->nchildren; j++) {
            Ecma119Node *child = dir->info.dir->children[j];
            if (child->type == ECMA119_DIR) {
                pathlist[cur++] = child;
            }
        }
    }

    /* Write L Path Table */
    ret = write_path_table(t, pathlist, 1);
    if (ret < 0) {
        goto write_path_tables_exit;
    }

    /* Write L Path Table */
    ret = write_path_table(t, pathlist, 0);

    write_path_tables_exit: ;
    free(pathlist);
    return ret;
}


/**
 * Write the directory structure (ECMA-119, 6.8) and the L and M
 * Path Tables (ECMA-119, 6.9).
 */
static
int ecma119_writer_write_dirs(IsoImageWriter *writer)
{
    int ret, isofs_ca_changed = 0;
    Ecma119Image *t;
    Ecma119Node *root;
    char *value = NULL;
    size_t value_length;

    t = writer->target;

    /* first of all, we write the directory structure */
    if (t->eff_partition_offset > 0) {
        root = t->partition_root;

        if ((t->md5_file_checksums & 1) || t->md5_session_checksum) {
            /* Take into respect the address offset in "isofs.ca" */
            ret = iso_node_lookup_attr((IsoNode *) t->image->root, "isofs.ca",
                                       &value_length, &value, 0);
            if (value != NULL)
                free(value);
            if (ret == 1 && value_length == 20) {
                /* "isofs.ca" does really exist and has the expected length */
                ret = iso_root_set_isofsca((IsoNode *) t->image->root,
                             t->checksum_range_start - t->eff_partition_offset,
                             t->checksum_array_pos - t->eff_partition_offset,
                             t->checksum_idx_counter + 2, 16, "MD5", 0);
                if (ret < 0)
                    return ret;
                isofs_ca_changed = 1;
            }
        }
    } else {
        root = t->root;
    }
    ret = write_dirs(t, root, root);
    if (ret < 0) {
        return ret;
    }

    /* and write the path tables */
    ret = write_path_tables(t);
    if (ret < 0)
        return ret;
    if (t->md5_session_checksum) {
        /* Write tree checksum tag */
        if (t->eff_partition_offset > 0) {
            /* >>> TWINTREE: >>> For now, tags are only for the
                                 image start and not for the partition */;
        } else {
            ret = iso_md5_write_tag(t, 3);
        }
    }
    if (isofs_ca_changed) {
        /* Restore old addresses offset in "isofs.ca" of root node */
        ret = iso_root_set_isofsca((IsoNode *) t->image->root,
                             t->checksum_range_start,
                             t->checksum_array_pos,
                             t->checksum_idx_counter + 2, 16, "MD5", 0);
        if (ret < 0)
            return ret;
    }
    return ret;
}

/**
 * Write directory structure and Path Tables of the ECMA-119 tree.
 * This happens eventually a second time for the duplicates which use
 * addresses with partition offset.
 */
static
int ecma119_writer_write_data(IsoImageWriter *writer)
{
    int ret;
    Ecma119Image *t;
    uint32_t curblock;
    char *msg = NULL;

    if (writer == NULL)
        {ret = ISO_ASSERT_FAILURE; goto ex;}

    t = writer->target;

    ret = ecma119_writer_write_dirs(writer);
    if (ret < 0)
        goto ex;

    if (t->partition_offset > 0) {
        t->eff_partition_offset = t->partition_offset;
        ret = ecma119_writer_write_dirs(writer);
        t->eff_partition_offset = 0;
        if (ret < 0) 
            goto ex;
    }

    curblock = (t->bytes_written / 2048) + t->ms_block;
    if (curblock != t->tree_end_block) {
        LIBISO_ALLOC_MEM(msg, char, 100);
        sprintf(msg,
                "Calculated and written ECMA-119 tree end differ: %lu <> %lu",
                (unsigned long) t->tree_end_block,
                (unsigned long) curblock);
        iso_msgs_submit(0, msg, 0, "WARNING", 0);

        t->tree_end_block = 1;/* Mark for harsher reaction at end of writing */
    }
    ret = ISO_SUCCESS;
ex:;
    LIBISO_FREE_MEM(msg);
    return ret;
}

static
int ecma119_writer_free_data(IsoImageWriter *writer)
{
    /* nothing to do */
    return ISO_SUCCESS;
}

int ecma119_writer_create(Ecma119Image *target)
{
    int ret;
    IsoImageWriter *writer;

    writer = malloc(sizeof(IsoImageWriter));
    if (writer == NULL) {
        return ISO_OUT_OF_MEM;
    }

    writer->compute_data_blocks = ecma119_writer_compute_data_blocks;
    writer->write_vol_desc = ecma119_writer_write_vol_desc;
    writer->write_data = ecma119_writer_write_data;
    writer->free_data = ecma119_writer_free_data;
    writer->data = NULL;
    writer->target = target;

    /* add this writer to image */
    target->writers[target->nwriters++] = writer;

    iso_msg_debug(target->image->id, "Creating low level ECMA-119 tree...");
    ret = ecma119_tree_create(target);
    if (ret < 0) {
        return ret;
    }

    if(target->partition_offset > 0) {
        /* Create second tree */
        target->eff_partition_offset = target->partition_offset;
        ret = ecma119_tree_create(target);
        target->eff_partition_offset = 0;
        if (ret < 0)
            return ret;
    }

    /* we need the volume descriptor */
    target->curblock++;
    return ISO_SUCCESS;
}

/** compute how many padding bytes are needed */
static
int mspad_writer_compute_data_blocks(IsoImageWriter *writer)
{
    Ecma119Image *target;
    uint32_t min_size;

    if (writer == NULL) {
        return ISO_ASSERT_FAILURE;
    }
    target = writer->target;
    min_size = 32 + target->partition_offset;
    if (target->curblock < min_size) {
        target->mspad_blocks = min_size - target->curblock;
        target->curblock = min_size;
    }
    return ISO_SUCCESS;
}

static
int mspad_writer_write_vol_desc(IsoImageWriter *writer)
{
    /* nothing to do */
    return ISO_SUCCESS;
}

static
int mspad_writer_write_data(IsoImageWriter *writer)
{
    int ret;
    Ecma119Image *t;
    uint8_t *pad = NULL;
    size_t i;

    if (writer == NULL) {
        {ret = ISO_ASSERT_FAILURE; goto ex;}
    }
    t = writer->target;

    if (t->mspad_blocks == 0) {
        {ret = ISO_SUCCESS; goto ex;}
    }

    LIBISO_ALLOC_MEM(pad, uint8_t, BLOCK_SIZE);
    for (i = 0; i < t->mspad_blocks; ++i) {
        ret = iso_write(t, pad, BLOCK_SIZE);
        if (ret < 0) {
            goto ex;
        }
    }

    ret = ISO_SUCCESS;
ex:;
    LIBISO_FREE_MEM(pad);
    return ret;
}

static
int mspad_writer_free_data(IsoImageWriter *writer)
{
    /* nothing to do */
    return ISO_SUCCESS;
}

static
int mspad_writer_create(Ecma119Image *target)
{
    IsoImageWriter *writer;

    writer = malloc(sizeof(IsoImageWriter));
    if (writer == NULL) {
        return ISO_OUT_OF_MEM;
    }

    writer->compute_data_blocks = mspad_writer_compute_data_blocks;
    writer->write_vol_desc = mspad_writer_write_vol_desc;
    writer->write_data = mspad_writer_write_data;
    writer->free_data = mspad_writer_free_data;
    writer->data = NULL;
    writer->target = target;

    /* add this writer to image */
    target->writers[target->nwriters++] = writer;
    return ISO_SUCCESS;
}


/** ----- Zero padding writer ----- */

struct iso_zero_writer_data_struct {
    uint32_t num_blocks;
};

static
int zero_writer_compute_data_blocks(IsoImageWriter *writer)
{
    Ecma119Image *target;
    struct iso_zero_writer_data_struct *data;

    if (writer == NULL)
        return ISO_ASSERT_FAILURE;
    target = writer->target;
    data = (struct iso_zero_writer_data_struct *) writer->data;
    target->curblock += data->num_blocks;
    return ISO_SUCCESS;
}

static
int zero_writer_write_vol_desc(IsoImageWriter *writer)
{
    /* nothing to do */
    return ISO_SUCCESS;
}

static
int zero_writer_write_data(IsoImageWriter *writer)
{
    int ret;
    Ecma119Image *t;
    struct iso_zero_writer_data_struct *data;
    uint8_t *pad = NULL;
    size_t i;

    if (writer == NULL)
        {ret = ISO_ASSERT_FAILURE; goto ex;}
    t = writer->target;
    data = (struct iso_zero_writer_data_struct *) writer->data;

    if (data->num_blocks == 0) 
        {ret = ISO_SUCCESS; goto ex;}
    LIBISO_ALLOC_MEM(pad, uint8_t, BLOCK_SIZE);
    for (i = 0; i < data->num_blocks; ++i) {
        ret = iso_write(t, pad, BLOCK_SIZE);
        if (ret < 0) 
            goto ex;
    }
    ret = ISO_SUCCESS;
ex:;
    LIBISO_FREE_MEM(pad);
    return ret;
}

static
int zero_writer_free_data(IsoImageWriter *writer)
{
    if (writer == NULL)
        return ISO_SUCCESS;
    if (writer->data == NULL)
        return ISO_SUCCESS;
    free(writer->data);
    writer->data = NULL;
    return ISO_SUCCESS;
}

static
int tail_writer_compute_data_blocks(IsoImageWriter *writer)
{
    int ret;
    Ecma119Image *target;
    struct iso_zero_writer_data_struct *data;
    char msg[80];

    target = writer->target;
    ret = iso_align_isohybrid(target, 0);
    if (ret < 0)
        return ret;
    data = (struct iso_zero_writer_data_struct *) writer->data;
    if (data->num_blocks != target->tail_blocks) {
        sprintf(msg, "Aligned image size to cylinder size by %d blocks",
                     target->tail_blocks - data->num_blocks);
        iso_msgs_submit(0, msg, 0, "NOTE", 0);
        data->num_blocks = target->tail_blocks;
    }
    if (target->tail_blocks <= 0)
        return ISO_SUCCESS;
    ret = zero_writer_compute_data_blocks(writer);
    return ret;
}

/*
  @param flag bit0= use tail_writer_compute_data_blocks rather than
                    zero_writer_compute_data_blocks
*/
static
int zero_writer_create(Ecma119Image *target, uint32_t num_blocks, int flag)
{
    IsoImageWriter *writer;
    struct iso_zero_writer_data_struct *data;

    writer = malloc(sizeof(IsoImageWriter));
    if (writer == NULL) {
        return ISO_OUT_OF_MEM;
    }
    data = calloc(1, sizeof(struct iso_zero_writer_data_struct));
    if (data == NULL) {
        free(writer);
        return ISO_OUT_OF_MEM;
    }
    data->num_blocks = num_blocks;

    if (flag & 1) {
        writer->compute_data_blocks = tail_writer_compute_data_blocks;
    } else {
        writer->compute_data_blocks = zero_writer_compute_data_blocks;
    }
    writer->write_vol_desc = zero_writer_write_vol_desc;
    writer->write_data = zero_writer_write_data;
    writer->free_data = zero_writer_free_data;
    writer->data = data;
    writer->target = target;

    /* add this writer to image */
    target->writers[target->nwriters++] = writer;
    return ISO_SUCCESS;
}

static
int transplant_checksum_buffer(Ecma119Image *target, int flag)
{
    /* Transplant checksum buffer from Ecma119Image to IsoImage */
    iso_image_set_checksums(target->image, target->checksum_buffer,
                            target->checksum_range_start,
                            target->checksum_array_pos,
                            target->checksum_idx_counter + 2, 0);
    target->checksum_buffer = NULL;
    target->checksum_idx_counter = 0;
    return 1;
}

static
int write_vol_desc_terminator(Ecma119Image *target)
{
    int ret;
    uint8_t *buf = NULL;
    struct ecma119_vol_desc_terminator *vol;

    LIBISO_ALLOC_MEM(buf, uint8_t, BLOCK_SIZE);

    vol = (struct ecma119_vol_desc_terminator *) buf;

    vol->vol_desc_type[0] = 255;
    memcpy(vol->std_identifier, "CD001", 5);
    vol->vol_desc_version[0] = 1;

    ret = iso_write(target, buf, BLOCK_SIZE);
ex:
    LIBISO_FREE_MEM(buf);
    return ret;
}


/* @param flag bit0= initialize system area by target->opts_overwrite
               bit1= fifo is not yet draining. Inquire write_count from fifo.
*/
static
int write_head_part1(Ecma119Image *target, int *write_count, int flag)
{
    int res, i;
    uint8_t sa[16 * BLOCK_SIZE];
    IsoImageWriter *writer;
    size_t buffer_size = 0, buffer_free = 0, buffer_start_free = 0;

    iso_ring_buffer_get_buf_status(target->buffer, &buffer_size,
                                   &buffer_start_free);
    *write_count = 0;
    /* Write System Area (ECMA-119, 6.2.1) */
    if ((flag & 1) && target->opts_overwrite != NULL)
        memcpy(sa, target->opts_overwrite, 16 * BLOCK_SIZE);
    res = iso_write_system_area(target, sa);
    if (res < 0)
        goto write_error;
    res = iso_write(target, sa, 16 * BLOCK_SIZE);
    if (res < 0)
        goto write_error;
    *write_count = 16;

    /* write volume descriptors, one per writer */
    iso_msg_debug(target->image->id, "Write volume descriptors");
    for (i = 0; i < (int) target->nwriters; ++i) {
        writer = target->writers[i];
        res = writer->write_vol_desc(writer);
        if (res < 0) 
            goto write_error;
    }

    /* write Volume Descriptor Set Terminator (ECMA-119, 8.3) */
    res = write_vol_desc_terminator(target);
    if (res < 0)
        goto write_error;

    if(flag & 2) {
      iso_ring_buffer_get_buf_status(target->buffer, &buffer_size,
                                     &buffer_free);
      *write_count = ( buffer_start_free - buffer_free ) / BLOCK_SIZE;
    } else {
      *write_count = target->bytes_written / BLOCK_SIZE;
    }

    return ISO_SUCCESS;
write_error:;
    return res;
}

static
int write_head_part2(Ecma119Image *target, int *write_count, int flag)
{
    int ret, i;
    uint8_t *buf = NULL;
    IsoImageWriter *writer;

    if (target->partition_offset <= 0)
        {ret = ISO_SUCCESS; goto ex;}

    /* Write multi-session padding up to target->partition_offset + 16 */
    LIBISO_ALLOC_MEM(buf, uint8_t, BLOCK_SIZE);
    for(; *write_count < (int) target->partition_offset + 16;
        (*write_count)++) {
        ret = iso_write(target, buf, BLOCK_SIZE);
        if (ret < 0)
            goto ex;
    }

    /* Write volume descriptors subtracting
      target->partiton_offset from any LBA pointer.
    */
    target->eff_partition_offset = target->partition_offset;
    for (i = 0; i < (int) target->nwriters; ++i) {
        writer = target->writers[i];
        /* Not all writers have an entry in the partion volume descriptor set.
           It must be guaranteed that they write exactly one block.
        */

        /* >>> TWINTREE: Enhance ISO1999 writer and add it here */

        if(writer->write_vol_desc != ecma119_writer_write_vol_desc &&
           writer->write_vol_desc != joliet_writer_write_vol_desc)
    continue;
        ret = writer->write_vol_desc(writer);
        if (ret < 0)
            goto ex;
        (*write_count)++;
    }
    ret = write_vol_desc_terminator(target);
    if (ret < 0)
        goto ex;
    (*write_count)++;
    target->eff_partition_offset = 0;

    /* >>> TWINTREE: Postponed for now:
                     Write second superblock checksum tag */;

    ret = ISO_SUCCESS;
ex:;
    return ret;
}

static
int write_head_part(Ecma119Image *target, int flag)
{
    int res, write_count = 0;

    /* System area and volume descriptors */
    res = write_head_part1(target, &write_count, 0);
    if (res < 0)
        return res;

    /* Write superblock checksum tag */
    if (target->md5_session_checksum && target->checksum_ctx != NULL) {
        res = iso_md5_write_tag(target, 2);
        if (res < 0)
            return res;
        write_count++;
    }

    /* Second set of system area and volume descriptors for partition_offset */
    res = write_head_part2(target, &write_count, 0);
    if (res < 0)
        return res;
    return ISO_SUCCESS;
}


/* Eventually end Jigdo Template Extraction */
static int finish_libjte(Ecma119Image *target)
{
#ifdef Libisofs_with_libjtE

    int ret;

    if (target->libjte_handle != NULL) {
        ret = libjte_write_footer(target->libjte_handle);
        if (ret <= 0) {
            iso_libjte_forward_msgs(target->libjte_handle, 
                                target->image->id, ISO_LIBJTE_END_FAILED, 0);
            return ISO_LIBJTE_END_FAILED;
        }
    }

#endif /* Libisofs_with_libjtE */

    return 1;
}


static int write_mbr_partition_file(Ecma119Image *target, char *path,
                                    uint32_t prepad, uint32_t blocks, int flag)
{
    FILE *fp = NULL;
    uint32_t i;
    uint8_t *buf = NULL;
    int ret;

    LIBISO_ALLOC_MEM(buf, uint8_t, BLOCK_SIZE);
    for (i = 0; i < prepad; i++) {
        ret = iso_write(target, buf, BLOCK_SIZE);
        if (ret < 0)
            goto ex;
    }

    fp = fopen(path, "rb");
    if (fp == NULL)
        {ret = ISO_BAD_PARTITION_FILE; goto ex;}

    for (i = 0; i < blocks; i++) {
        memset(buf, 0, BLOCK_SIZE);
        if (fp != NULL) {
            ret = fread(buf, 1, BLOCK_SIZE, fp);
            if (ret != BLOCK_SIZE) {
                 fclose(fp);
                 fp = NULL;
            }
        }
        ret = iso_write(target, buf, BLOCK_SIZE);
        if (ret < 0) {
            fclose(fp);
            goto ex;
        }
    }
    if (fp != NULL) 
        fclose(fp);
    ret = ISO_SUCCESS;
ex:;
    LIBISO_FREE_MEM(buf);
    return ret;
}


static
void *write_function(void *arg)
{
    int res, first_partition = 1, last_partition = 0, sa_type;
    int i;
    IsoImageWriter *writer;

    Ecma119Image *target = (Ecma119Image*)arg;
    iso_msg_debug(target->image->id, "Starting image writing...");

    target->bytes_written = (off_t) 0;
    target->percent_written = 0;

    res = write_head_part(target, 0);
    if (res < 0)
        goto write_error;

    /* write data for each writer */
    for (i = 0; i < (int) target->nwriters; ++i) {
        writer = target->writers[i];
        res = writer->write_data(writer);
        if (res < 0) {
            goto write_error;
        }
    }

    /* Append partition data */
    sa_type = (target->system_area_options >> 2) & 0x3f;
    if (sa_type == 0) { /* MBR */
        first_partition = 1;
        last_partition = 4;
    } else if (sa_type == 3) { /* SUN Disk Label */
        first_partition = 2;
        last_partition = 8;
    }
    for (i = first_partition - 1; i <= last_partition - 1; i++) {
        if (target->appended_partitions[i] == NULL)
    continue;
        if (target->appended_partitions[i][0] == 0)
    continue;
        res = write_mbr_partition_file(target, target->appended_partitions[i],
                                       target->appended_part_prepad[i],
                                       target->appended_part_size[i], 0);
        if (res < 0)
            goto write_error;
    }

    /* Transplant checksum buffer from Ecma119Image to IsoImage */
    transplant_checksum_buffer(target, 0);

    iso_ring_buffer_writer_close(target->buffer, 0);

    res = finish_libjte(target);
    if (res <= 0)
        goto write_error;

    target->image->generator_is_running = 0;

    /* Give up reference claim made in ecma119_image_new().
       Eventually free target */
    ecma119_image_free(target);

    if (target->tree_end_block == 1) {
        iso_msgs_submit(0,
    "Image is most likely damaged. Calculated/written block address mismatch.",
                        0, "FATAL", 0);
    }

#ifdef Libisofs_with_pthread_exiT
    pthread_exit(NULL);
#else
    return NULL;
#endif

    write_error: ;
    if (res != (int) ISO_LIBJTE_END_FAILED)
        finish_libjte(target);
    target->eff_partition_offset = 0;
    if (res == (int) ISO_CANCELED) {
        /* canceled */
        if (!target->will_cancel)
            iso_msg_submit(target->image->id, ISO_IMAGE_WRITE_CANCELED,
                           0, NULL);
    } else {
        /* image write error */
        iso_msg_submit(target->image->id, ISO_WRITE_ERROR, res,
                   "Image write error");
    }
    iso_ring_buffer_writer_close(target->buffer, 1);

    /* Transplant checksum buffer away from Ecma119Image */
    transplant_checksum_buffer(target, 0);
    /* Invalidate the transplanted checksum buffer in IsoImage */
    iso_image_free_checksums(target->image, 0);

    target->image->generator_is_running = 0;

    /* Give up reference claim made in ecma119_image_new().
       Eventually free target */
    ecma119_image_free(target);

#ifdef Libisofs_with_pthread_exiT
    pthread_exit(NULL);
#else
    return NULL;
#endif

}


static
int checksum_prepare_image(IsoImage *src, int flag)
{
    int ret;

    /* Set provisory value of isofs.ca with
       4 byte LBA, 4 byte count, size 16, name MD5 */
    ret = iso_root_set_isofsca((IsoNode *) src->root, 0, 0, 0, 16, "MD5", 0);
    if (ret < 0)
        return ret;
    return ISO_SUCCESS;
}


/*
  @flag bit0= recursion
*/
static
int checksum_prepare_nodes(Ecma119Image *target, IsoNode *node, int flag)
{
    IsoNode *pos;
    IsoFile *file;
    IsoImage *img;
    int ret, i, no_md5 = 0, has_xinfo = 0;
    size_t value_length;
    unsigned int idx = 0;
    char *value= NULL;
    void *xipt = NULL;
    static char *cx_names = "isofs.cx";
    static size_t cx_value_lengths[1] = {0};
    char *cx_valuept = "";

    img= target->image;

    if (node->type == LIBISO_FILE) {
        file = (IsoFile *) node;
        if (file->from_old_session && target->appendable) {
            /* Save MD5 data of files from old image which will not
               be copied and have an MD5 recorded in the old image. */
            has_xinfo = iso_node_get_xinfo(node, checksum_md5_xinfo_func,
                                           &xipt);
            if (has_xinfo <= 0) {
                ret = iso_node_lookup_attr(node, "isofs.cx", &value_length,
                                           &value, 0);
            }
            if (has_xinfo > 0) {
                /* xinfo MD5 overrides everything else unless data get copied
                   and checksummed during that copying
                 */;
            } else if (ret == 1 && img->checksum_array == NULL) {
                /* No checksum array loaded. Delete "isofs.cx" */
                iso_node_set_attrs(node, (size_t) 1,
                              &cx_names, cx_value_lengths, &cx_valuept, 4 | 8);
                no_md5 = 1;
            } else if (ret == 1 && value_length == 4) {
                for (i = 0; i < 4; i++)
                    idx = (idx << 8) | ((unsigned char *) value)[i];
                if (idx > 0 && idx < 0x8000000) {
                    /* xipt is an int disguised as void pointer */
                    for (i = 0; i < 4; i++)
                        ((char *) &xipt)[i] = value[i];
                    ret = iso_node_add_xinfo(node, checksum_cx_xinfo_func,
                                             xipt);
                    if (ret < 0)
                        return ret;
                } else
                    no_md5 = 1;
            } else {
                no_md5 = 1;
            }
            if (value != NULL) {
                free(value);
                value= NULL;
            }
        }
        /* Equip nodes with provisory isofs.cx numbers: 4 byte, all 0.
           Omit those from old image which will not be copied and have no MD5.
         */
        if (!no_md5) {
            ret = iso_file_set_isofscx(file, (unsigned int) 0, 0);
            if (ret < 0)
                return ret;
        }
    } else if (node->type == LIBISO_DIR) {
        for (pos = ((IsoDir *) node)->children; pos != NULL; pos = pos->next) {
            ret = checksum_prepare_nodes(target, pos, 1);
            if (ret < 0)
                return ret;
        }
    }
    return ISO_SUCCESS;
}

static
int ecma119_image_new(IsoImage *src, IsoWriteOpts *opts, Ecma119Image **img)
{
    int ret, i, voldesc_size, nwriters, image_checksums_mad = 0, tag_pos;
    int sa_type;
    Ecma119Image *target;
    IsoImageWriter *writer;
    int el_torito_writer_index = -1, file_src_writer_index = -1;
    int system_area_options = 0;
    char *system_area = NULL;
    int write_count = 0, write_count_mem;


    /* 1. Allocate target and copy opts there */
    target = calloc(1, sizeof(Ecma119Image));
    if (target == NULL) {
        return ISO_OUT_OF_MEM;
    }
    /* This reference will be transfered to the burn_source and released by
       bs_free_data.
    */
    target->refcount = 1;

    /* create the tree for file caching */
    ret = iso_rbtree_new(iso_file_src_cmp, &(target->files));
    if (ret < 0) {
        goto target_cleanup;
    }

    target->image = src;
    iso_image_ref(src);

    target->will_cancel = opts->will_cancel;
    target->iso_level = opts->level;
    target->rockridge = opts->rockridge;
    target->joliet = opts->joliet;
    target->iso1999 = opts->iso1999;
    target->hardlinks = opts->hardlinks;
    target->aaip = opts->aaip;
    target->always_gmt = opts->always_gmt;
    target->old_empty = opts->old_empty;
    target->untranslated_name_len = opts->untranslated_name_len;
    target->allow_dir_id_ext = opts->allow_dir_id_ext;
    target->omit_version_numbers = opts->omit_version_numbers
                                 | opts->max_37_char_filenames;
    target->allow_deep_paths = opts->allow_deep_paths;
    target->allow_longer_paths = opts->allow_longer_paths;
    target->max_37_char_filenames = opts->max_37_char_filenames;
    target->no_force_dots = opts->no_force_dots;
    target->allow_lowercase = opts->allow_lowercase;
    target->allow_full_ascii = opts->allow_full_ascii;
    target->relaxed_vol_atts = opts->relaxed_vol_atts;
    target->joliet_longer_paths = opts->joliet_longer_paths;
    target->joliet_long_names = opts->joliet_long_names;
    target->rrip_version_1_10 = opts->rrip_version_1_10;
    target->rrip_1_10_px_ino = opts->rrip_1_10_px_ino;
    target->aaip_susp_1_10 = opts->aaip_susp_1_10;
    target->dir_rec_mtime = opts->dir_rec_mtime;
    target->sort_files = opts->sort_files;

    target->replace_uid = opts->replace_uid ? 1 : 0;
    target->replace_gid = opts->replace_gid ? 1 : 0;
    target->replace_dir_mode = opts->replace_dir_mode ? 1 : 0;
    target->replace_file_mode = opts->replace_file_mode ? 1 : 0;

    target->uid = opts->replace_uid == 2 ? opts->uid : 0;
    target->gid = opts->replace_gid == 2 ? opts->gid : 0;
    target->dir_mode = opts->replace_dir_mode == 2 ? opts->dir_mode : 0555;
    target->file_mode = opts->replace_file_mode == 2 ? opts->file_mode : 0444;

    target->now = time(NULL);
    target->ms_block = opts->ms_block;
    target->appendable = opts->appendable;

    target->replace_timestamps = opts->replace_timestamps ? 1 : 0;
    target->timestamp = opts->replace_timestamps == 2 ?
                        opts->timestamp : target->now;

    /* el-torito? */
    target->eltorito = (src->bootcat == NULL ? 0 : 1);
    target->catalog = src->bootcat;
    if (target->catalog != NULL) {
        target->num_bootsrc = target->catalog->num_bootimages;
        target->bootsrc = calloc(target->num_bootsrc + 1,
                                    sizeof(IsoFileSrc *));
        if (target->bootsrc == NULL) {
            ret = ISO_OUT_OF_MEM;
            goto target_cleanup;
        }
        for (i= 0; i < target->num_bootsrc; i++)
            target->bootsrc[i] = NULL;
    } else {
        target->num_bootsrc = 0;
        target->bootsrc = NULL;
    }

    if (opts->system_area_data != NULL) {
        system_area = opts->system_area_data;
        system_area_options = opts->system_area_options;
    } else if (src->system_area_data != NULL) {
        system_area = src->system_area_data;
        system_area_options = src->system_area_options;
    } else {
        system_area_options = opts->system_area_options & 0xfffffffc;
    }
    sa_type = (system_area_options >> 2) & 0x3f;
    if (sa_type != 0 && sa_type != 3)
        for (i = 0; i < ISO_MAX_PARTITIONS; i++)
            if (opts->appended_partitions[i] != NULL)
                return ISO_NON_MBR_SYS_AREA;

    target->system_area_data = NULL;
    if (system_area != NULL) {
        target->system_area_data = calloc(32768, 1);
        if (target->system_area_data == NULL) {
            ret = ISO_OUT_OF_MEM;
            goto target_cleanup;
        }
        memcpy(target->system_area_data, system_area, 32768);
    }
    target->system_area_options = system_area_options;

    target->vol_creation_time = opts->vol_creation_time;
    target->vol_modification_time = opts->vol_modification_time;
    target->vol_expiration_time = opts->vol_expiration_time;
    target->vol_effective_time = opts->vol_effective_time;
    strcpy(target->vol_uuid, opts->vol_uuid);

    target->partition_offset = opts->partition_offset;
    target->partition_secs_per_head = opts->partition_secs_per_head;
    target->partition_heads_per_cyl = opts->partition_heads_per_cyl;
    if (target->partition_secs_per_head == 0)
        target->partition_secs_per_head = 32;
    if (target->partition_heads_per_cyl == 0)
        target->partition_heads_per_cyl = 64;
    target->eff_partition_offset = 0;
    target->partition_root = NULL;
    target->partition_l_table_pos = 0;
    target->partition_m_table_pos = 0;
    target->j_part_root = NULL;
    target->j_part_l_path_table_pos = 0;
    target->j_part_m_path_table_pos = 0;
    target->input_charset = strdup(iso_get_local_charset(0));
    if (target->input_charset == NULL) {
        ret = ISO_OUT_OF_MEM;
        goto target_cleanup;
    }

    if (opts->output_charset != NULL) {
        target->output_charset = strdup(opts->output_charset);
    } else {
        target->output_charset = strdup(target->input_charset);
    }
    if (target->output_charset == NULL) {
        ret = ISO_OUT_OF_MEM;
        goto target_cleanup;
    }

    target->md5_file_checksums = opts->md5_file_checksums;
    target->md5_session_checksum = opts->md5_session_checksum;
    strcpy(target->scdbackup_tag_parm, opts->scdbackup_tag_parm);
    target->scdbackup_tag_written = opts->scdbackup_tag_written;
    target->checksum_idx_counter = 0;
    target->checksum_ctx = NULL;
    target->checksum_counter = 0;
    target->checksum_rlsb_tag_pos = 0;
    target->checksum_sb_tag_pos = 0;
    target->checksum_tree_tag_pos = 0;
    target->checksum_tag_pos = 0;
    target->checksum_buffer = NULL;
    target->checksum_array_pos = 0;
    target->checksum_range_start = 0;
    target->checksum_range_size = 0;
    target->opts_overwrite = NULL;

#ifdef Libisofs_with_libjtE

    /* Eventually start Jigdo Template Extraction */
    target->libjte_handle = NULL;
    if (opts->libjte_handle != NULL) {
        target->libjte_handle = opts->libjte_handle;
        ret = libjte_write_header(target->libjte_handle);
        if (ret <= 0) {
            iso_libjte_forward_msgs(target->libjte_handle, 
                                target->image->id, ISO_LIBJTE_START_FAILED, 0);
            ret = ISO_LIBJTE_START_FAILED;
            goto target_cleanup;
        }
    }
    
#endif /* Libisofs_with_libjtE */

    target->tail_blocks = opts->tail_blocks;

    target->mipsel_e_entry = 0;
    target->mipsel_p_offset = 0;
    target->mipsel_p_vaddr = 0;
    target->mipsel_p_filesz = 0;

    target->empty_file_block = 0;
    target->tree_end_block = 0;

    target->wthread_is_running = 0;

    for (i = 0; i < ISO_MAX_PARTITIONS; i++) {
        target->appended_partitions[i] = NULL;
        if (opts->appended_partitions[i] != NULL) {
            target->appended_partitions[i] =
                                          strdup(opts->appended_partitions[i]);
            if (target->appended_partitions[i] == NULL)
                return ISO_OUT_OF_MEM;
            target->appended_part_types[i] = opts->appended_part_types[i];
        }
        target->appended_part_prepad[i] = 0;
        target->appended_part_start[i] = target->appended_part_size[i] = 0;
    }
    strcpy(target->ascii_disc_label, opts->ascii_disc_label);

    /*
     * 2. Based on those options, create needed writers: iso, joliet...
     * Each writer inits its structures and stores needed info into
     * target.
     * If the writer needs an volume descriptor, it increments image
     * current block.
     * Finally, create Writer for files.
     */
    target->curblock = target->ms_block + 16;

    if (opts->overwrite != NULL && target->ms_block != 0 &&
        target->ms_block < target->partition_offset + 32) {
        /* Not enough room for superblock relocation */
        ret = ISO_OVWRT_MS_TOO_SMALL;
        goto target_cleanup;
    }

    /* the number of writers is dependent of the extensions */
    nwriters = 1 + 1 + 1; /* ECMA-119 + multi-session padding + files */

    if (target->eltorito) {
        nwriters++;
    }
    if (target->joliet) {
        nwriters++;
    }
    if (target->iso1999) {
        nwriters++;
    }
    nwriters++; /* Tail padding writer */
    if ((target->md5_file_checksums & 1) || target->md5_session_checksum) {
        nwriters++;
        image_checksums_mad = 1; /* from here on the loaded checksums are
                                    not consistent with isofs.cx any more.
                                  */
        ret = checksum_prepare_image(src, 0);
        if (ret < 0)
            goto target_cleanup;
        if (target->appendable) {
            ret = checksum_prepare_nodes(target, (IsoNode *) src->root, 0);
            if (ret < 0)
                goto target_cleanup;
        }
        target->checksum_idx_counter = 0;
    }

    target->writers = malloc(nwriters * sizeof(void*));
    if (target->writers == NULL) {
        ret = ISO_OUT_OF_MEM;
        goto target_cleanup;
    }

    /* create writer for ECMA-119 structure */
    ret = ecma119_writer_create(target);
    if (ret < 0) {
        goto target_cleanup;
    }

    /* create writer for El-Torito */
    if (target->eltorito) {
        ret = eltorito_writer_create(target);
        if (ret < 0) {
            goto target_cleanup;
        }
        el_torito_writer_index = target->nwriters - 1;
    }

    /* create writer for Joliet structure */
    if (target->joliet) {
        ret = joliet_writer_create(target);
        if (ret < 0) {
            goto target_cleanup;
        }
    }

    /* create writer for ISO 9660:1999 structure */
    if (target->iso1999) {
        ret = iso1999_writer_create(target);
        if (ret < 0) {
            goto target_cleanup;
        }
    }

    voldesc_size = target->curblock - target->ms_block - 16;

    /* Volume Descriptor Set Terminator */
    target->curblock++;

    /* All empty files point to the Volume Descriptor Set Terminator
     * rather than to addresses of non-empty files.
     */
    target->empty_file_block = target->curblock - 1;

    /*
     * Create the writer for possible padding to ensure that in case of image
     * growing we can safely overwrite the first 64 KiB of image.
     */
    ret = mspad_writer_create(target);
    if (ret < 0) {
        goto target_cleanup;
    }

    /* create writer for file contents */
    ret = iso_file_src_writer_create(target);
    if (ret < 0) {
        goto target_cleanup;
    }
    file_src_writer_index = target->nwriters - 1;


    /* IMPORTANT: This must be the last writer before the checksum writer */
    ret = zero_writer_create(target, target->tail_blocks, 1);
    if (ret < 0)
        goto target_cleanup;

    if ((target->md5_file_checksums & 1) || target->md5_session_checksum) {
        ret = checksum_writer_create(target);
        if (ret < 0)
            goto target_cleanup;
    }
    
    if (target->partition_offset > 0) {
        /* After volume descriptors and superblock tag are accounted for:
           account for second volset
        */
        if (target->ms_block + target->partition_offset + 16
            < target->curblock) {
            /* Overflow of partition system area */
            ret = ISO_PART_OFFST_TOO_SMALL;
            goto target_cleanup;
        }
        target->curblock = target->ms_block + target->partition_offset + 16;

        /* Account for partition tree volume descriptors */
        for (i = 0; i < (int) target->nwriters; ++i) {
            /* Not all writers have an entry in the partition
               volume descriptor set.
            */
            writer = target->writers[i];

            /* >>> TWINTREE: Enhance ISO1999 writer and add it here */

            if(writer->write_vol_desc != ecma119_writer_write_vol_desc &&
               writer->write_vol_desc != joliet_writer_write_vol_desc)
        continue;
            target->curblock++;
        }
        target->curblock++; /* + Terminator */

        /* >>> TWINTREE: eventually later : second superblock checksum tag */;

    }


    /*
     * 3.
     * Call compute_data_blocks() in each Writer.
     * That function computes the size needed by its structures and
     * increments image current block propertly.
     */
    for (i = 0; i < (int) target->nwriters; ++i) {
        IsoImageWriter *writer = target->writers[i];

        /* Delaying boot image patching until new LBA is known */
        if (i == el_torito_writer_index)
    continue;

        /* Exposing address of data start to IsoWriteOpts and memorizing
           this address for all files which have no block address: 
           symbolic links, device files, empty data files.
           filesrc_writer_compute_data_blocks() and filesrc_writer_write_data()
           will account resp. write this single block. 
        */
        if (i == file_src_writer_index) {
            if (! target->old_empty)
                target->empty_file_block = target->curblock;
            opts->data_start_lba = target->curblock;
        }

        ret = writer->compute_data_blocks(writer);
        if (ret < 0) {
            goto target_cleanup;
        }
    }

    /* Now perform delayed image patching and System Area preparations */
    if (el_torito_writer_index >= 0) {
        IsoImageWriter *writer = target->writers[el_torito_writer_index];
        ret = writer->compute_data_blocks(writer);
        if (ret < 0) {
            goto target_cleanup;
        }
    }
    if (((target->system_area_options & 0xfc) >> 2) == 2) {
        ret = iso_read_mipsel_elf(target, 0);
        if (ret < 0)
            goto target_cleanup;
    }

    /*
     * The volume space size is just the size of the last session, in
     * case of ms images.
     */
    target->vol_space_size = target->curblock - target->ms_block;
    target->total_size = (off_t) target->vol_space_size * BLOCK_SIZE;

    /* Add sizes of eventually appended partitions */
    ret = iso_compute_append_partitions(target, 0);
    if (ret < 0)
        goto target_cleanup;

    /* create the ring buffer */
    if (opts->overwrite != NULL &&
        opts->fifo_size / 2048 < 32 + target->partition_offset) {
        /* The ring buffer must be large enough to take opts->overwrite
        */
        ret = ISO_OVWRT_FIFO_TOO_SMALL;
    }
    ret = iso_ring_buffer_new(opts->fifo_size, &target->buffer);
    if (ret < 0) {
        goto target_cleanup;
    }

    /* check if we need to provide a copy of volume descriptors */
    if (opts->overwrite != NULL) {

        /* opts->overwrite must be larger by partion_offset
           This storage is provided by the application.
        */


        /*
         * In the PVM to be written in the 16th sector of the disc, we
         * need to specify the full size.
         */
        target->vol_space_size = target->curblock;

        /* System area and volume descriptors */
        target->opts_overwrite = (char *) opts->overwrite;
        ret = write_head_part1(target, &write_count, 1 | 2);
        target->opts_overwrite = NULL;
        if (ret < 0)
            goto target_cleanup;

        /* copy the volume descriptors to the overwrite buffer... */
        voldesc_size *= BLOCK_SIZE;
        ret = iso_ring_buffer_read(target->buffer, opts->overwrite,
                                   write_count * BLOCK_SIZE);
        if (ret < 0) {
            iso_msg_debug(target->image->id,
                          "Error reading overwrite volume descriptors");
            goto target_cleanup;
        }

        /* Write relocated superblock checksum tag */
        tag_pos = voldesc_size / BLOCK_SIZE + 16 + 1;
        if (target->md5_session_checksum) {
            target->checksum_rlsb_tag_pos = tag_pos;
            if (target->checksum_rlsb_tag_pos < 32) {
                ret = iso_md5_start(&(target->checksum_ctx));
                if (ret < 0)
                    goto target_cleanup;
                target->opts_overwrite = (char *) opts->overwrite;
                iso_md5_compute(target->checksum_ctx, target->opts_overwrite,
                                target->checksum_rlsb_tag_pos * 2048);
                ret = iso_md5_write_tag(target, 4);
                target->opts_overwrite = NULL; /* opts might not persist */
                if (ret < 0)
                    goto target_cleanup;
            }
            tag_pos++;
            write_count++;
        } 

        /* Clean out eventual obsolete checksum tags */
        for (i = tag_pos; i < 32; i++) {
            int tag_type;
            uint32_t pos, range_start, range_size, next_tag;
            char md5[16];
 	
            ret = iso_util_decode_md5_tag((char *)(opts->overwrite + i * 2048),
                                          &tag_type, &pos, &range_start,
                                          &range_size, &next_tag, md5, 0);
            if (ret > 0)
                opts->overwrite[i * 2048] = 0;
        }

        /* Write second set of volume descriptors */
        write_count_mem= write_count;
        ret = write_head_part2(target, &write_count, 0);
        if (ret < 0)
            goto target_cleanup;

        /* Read written data into opts->overwrite */
        ret = iso_ring_buffer_read(target->buffer,
                                opts->overwrite + write_count_mem * BLOCK_SIZE,
                                (write_count - write_count_mem) * BLOCK_SIZE);
        if (ret < 0) {
            iso_msg_debug(target->image->id,
                          "Error reading overwrite volume descriptors");
            goto target_cleanup;
        }
    }

    /* This was possibly altered by above overwrite buffer production */
    target->vol_space_size = target->curblock - target->ms_block;

/*
*/
#define Libisofs_print_size_no_forK 1

#ifdef Libisofs_print_size_no_forK
    if (opts->will_cancel) {
        iso_msg_debug(target->image->id,
      "Will not start write thread because of iso_write_opts_set_will_cancel");
        *img = target;
        return ISO_SUCCESS;
    }
#endif


    /* 4. Create and start writing thread */
    if (target->md5_session_checksum) {
        /* After any fake writes are done: Initialize image checksum context */
        if (target->checksum_ctx != NULL)
            iso_md5_end(&(target->checksum_ctx), target->image_md5);
        ret = iso_md5_start(&(target->checksum_ctx));
        if (ret < 0)
            goto target_cleanup;
    }
    /* Dispose old image checksum buffer. The one of target is supposed to
       get attached at the end of write_function(). */
    iso_image_free_checksums(target->image, 0);
    image_checksums_mad = 0;

    /* ensure the thread is created joinable */
    pthread_attr_init(&(target->th_attr));
    pthread_attr_setdetachstate(&(target->th_attr), PTHREAD_CREATE_JOINABLE);

    /* To avoid race conditions with the caller, this mark must be set
       before the thread starts. So the caller can rely on a value of 0
       really meaning that the write has ended, and not that it might not have
       begun yet.
       In normal processing, the value will be changed to 0 at the end of
       write_function().
    */
    target->image->generator_is_running = 1;


    /* Claim that target may not get destroyed by bs_free_data() before
       write_function() is done with it */
    target->refcount++;

    ret = pthread_create(&(target->wthread), &(target->th_attr),
                         write_function, (void *) target);
    if (ret != 0) {
        target->refcount--;
        iso_msg_submit(target->image->id, ISO_THREAD_ERROR, 0,
                      "Cannot create writer thread");
        ret = ISO_THREAD_ERROR;
        goto target_cleanup;
    }
    target->wthread_is_running= 1;

    /*
     * Notice that once we reach this point, target belongs to the writer
     * thread and should not be modified until the writer thread finished.
     * There're however, specific fields in target that can be accessed, or
     * even modified by the read thread (look inside bs_* functions)
     */

    *img = target;
    return ISO_SUCCESS;

    target_cleanup: ;
    if(image_checksums_mad) /* No checksums is better than mad checksums */
      iso_image_free_checksums(target->image, 0);
    target->image->generator_is_running = 0;
    ecma119_image_free(target);
    return ret;
}

static int bs_read(struct burn_source *bs, unsigned char *buf, int size)
{
    int ret;
    Ecma119Image *t = (Ecma119Image*)bs->data;

    ret = iso_ring_buffer_read(t->buffer, buf, size);
    if (ret == ISO_SUCCESS) {
        return size;
    } else if (ret < 0) {
        /* error */
        iso_msg_submit(t->image->id, ISO_BUF_READ_ERROR, ret, NULL);
        return -1;
    } else {
        /* EOF */
        return 0;
    }
}

static off_t bs_get_size(struct burn_source *bs)
{
    Ecma119Image *target = (Ecma119Image*)bs->data;
    return target->total_size;
}

static void bs_free_data(struct burn_source *bs)
{
    int st;
    Ecma119Image *target = (Ecma119Image*)bs->data;

    st = iso_ring_buffer_get_status(bs, NULL, NULL);

    /* was read already finished (i.e, canceled)? */
    if (st < 4) {
        /* forces writer to stop if it is still running */
        iso_ring_buffer_reader_close(target->buffer, 0);

        /* wait until writer thread finishes */
        if (target->wthread_is_running) {
            pthread_join(target->wthread, NULL);
            target->wthread_is_running = 0;
            iso_msg_debug(target->image->id, "Writer thread joined");
        }
    }

    iso_msg_debug(target->image->id,
                  "Ring buffer was %d times full and %d times empty",
                  iso_ring_buffer_get_times_full(target->buffer),
                  iso_ring_buffer_get_times_empty(target->buffer));

    /* The reference to target was inherited from ecma119_image_new() */
    ecma119_image_free(target);
}

static
int bs_cancel(struct burn_source *bs)
{
    int st;
    size_t cap, free;
    Ecma119Image *target = (Ecma119Image*)bs->data;

    st = iso_ring_buffer_get_status(bs, &cap, &free);

    if (free == cap && (st == 2 || st == 3)) {
        /* image was already consumed */
        iso_ring_buffer_reader_close(target->buffer, 0);
    } else {
        iso_msg_debug(target->image->id, "Reader thread being cancelled");

        /* forces writer to stop if it is still running */
        iso_ring_buffer_reader_close(target->buffer, ISO_CANCELED);
    }

    /* wait until writer thread finishes */
    if (target->wthread_is_running) {
        pthread_join(target->wthread, NULL);
        target->wthread_is_running = 0;
        iso_msg_debug(target->image->id, "Writer thread joined");
    }
    return ISO_SUCCESS;
}

static
int bs_set_size(struct burn_source *bs, off_t size)
{
    Ecma119Image *target = (Ecma119Image*)bs->data;

    /*
     * just set the value to be returned by get_size. This is not used at
     * all by libisofs, it is here just for helping libburn to correctly pad
     * the image if needed.
     */
    target->total_size = size;
    return 1;
}

int iso_image_create_burn_source(IsoImage *image, IsoWriteOpts *opts,
                                 struct burn_source **burn_src)
{
    int ret;
    struct burn_source *source;
    Ecma119Image *target= NULL;

    if (image == NULL || opts == NULL || burn_src == NULL) {
        return ISO_NULL_POINTER;
    }

    source = calloc(1, sizeof(struct burn_source));
    if (source == NULL) {
        return ISO_OUT_OF_MEM;
    }

    ret = ecma119_image_new(image, opts, &target);
    if (ret < 0) {
        free(source);
        return ret;
    }

    source->refcount = 1;
    source->version = 1;
    source->read = NULL;
    source->get_size = bs_get_size;
    source->set_size = bs_set_size;
    source->free_data = bs_free_data;
    source->read_xt = bs_read;
    source->cancel = bs_cancel;
    source->data = target;

    *burn_src = source;
    return ISO_SUCCESS;
}

int iso_write(Ecma119Image *target, void *buf, size_t count)
{
    int ret;

    ret = iso_ring_buffer_write(target->buffer, buf, count);
    if (ret == 0) {
        /* reader cancelled */
        return ISO_CANCELED;
    }
    if (ret < 0)
        return ret;
    if (target->checksum_ctx != NULL) {
        /* Add to image checksum */
        target->checksum_counter += count;
        iso_md5_compute(target->checksum_ctx, (char *) buf, (int) count);
    }

    ret = show_chunk_to_jte(target, buf, count);
    if (ret != ISO_SUCCESS)
        return ret;

    /* total size is 0 when writing the overwrite buffer */
    if (target->total_size != (off_t) 0){
        unsigned int kbw, kbt;
        int percent;

        target->bytes_written += (off_t) count;
        kbw = (unsigned int) (target->bytes_written >> 10);
        kbt = (unsigned int) (target->total_size >> 10);
        percent = (kbw * 100) / kbt;

        /* only report in 5% chunks */
        if (percent >= target->percent_written + 5) {
            iso_msg_debug(target->image->id, "Processed %u of %u KB (%d %%)",
                          kbw, kbt, percent);
            target->percent_written = percent;
        }
    }

    return ISO_SUCCESS;
}

int iso_write_opts_new(IsoWriteOpts **opts, int profile)
{
    int i;
    IsoWriteOpts *wopts;

    if (opts == NULL) {
        return ISO_NULL_POINTER;
    }
    if (profile < 0 || profile > 2) {
        return ISO_WRONG_ARG_VALUE;
    }

    wopts = calloc(1, sizeof(IsoWriteOpts));
    if (wopts == NULL) {
        return ISO_OUT_OF_MEM;
    }
    wopts->scdbackup_tag_written = NULL;

    switch (profile) {
    case 0:
        wopts->level = 1;
        break;
    case 1:
        wopts->level = 3;
        wopts->rockridge = 1;
        break;
    case 2:
        wopts->level = 2;
        wopts->rockridge = 1;
        wopts->joliet = 1;
        wopts->replace_dir_mode = 1;
        wopts->replace_file_mode = 1;
        wopts->replace_uid = 1;
        wopts->replace_gid = 1;
        wopts->replace_timestamps = 1;
        wopts->always_gmt = 1;
        break;
    default:
        /* should never happen */
        free(wopts);
        return ISO_ASSERT_FAILURE;
        break;
    }
    wopts->fifo_size = 1024; /* 2 MB buffer */
    wopts->sort_files = 1; /* file sorting is always good */

    wopts->system_area_data = NULL;
    wopts->system_area_options = 0;
    wopts->vol_creation_time = 0;
    wopts->vol_modification_time = 0;
    wopts->vol_expiration_time = 0;
    wopts->vol_effective_time = 0;
    wopts->vol_uuid[0] = 0;
    wopts->partition_offset = 0;
    wopts->partition_secs_per_head = 0;
    wopts->partition_heads_per_cyl = 0;

#ifdef Libisofs_with_libjtE
    wopts->libjte_handle = NULL;
#endif /* Libisofs_with_libjtE */

    wopts->tail_blocks = 0;
    for (i = 0; i < ISO_MAX_PARTITIONS; i++)
        wopts->appended_partitions[i] = NULL;
    wopts->ascii_disc_label[0] = 0;
    wopts->will_cancel = 0;
    wopts->allow_dir_id_ext = 0;
    wopts->old_empty = 0;
    wopts->untranslated_name_len = 0;

    *opts = wopts;
    return ISO_SUCCESS;
}

void iso_write_opts_free(IsoWriteOpts *opts)
{
    int i;

    if (opts == NULL) {
        return;
    }
    free(opts->output_charset);
    if (opts->system_area_data != NULL)
        free(opts->system_area_data);
    for (i = 0; i < ISO_MAX_PARTITIONS; i++)
        if (opts->appended_partitions[i] != NULL)
            free(opts->appended_partitions[i]);

    free(opts);
}

int iso_write_opts_set_will_cancel(IsoWriteOpts *opts, int will_cancel)
{
    if (opts == NULL) {
        return ISO_NULL_POINTER;
    }
    opts->will_cancel = !!will_cancel;
    return ISO_SUCCESS;
}

int iso_write_opts_set_iso_level(IsoWriteOpts *opts, int level)
{
    if (opts == NULL) {
        return ISO_NULL_POINTER;
    }
    if (level != 1 && level != 2 && level != 3) {
        return ISO_WRONG_ARG_VALUE;
    }
    opts->level = level;
    return ISO_SUCCESS;
}

int iso_write_opts_set_rockridge(IsoWriteOpts *opts, int enable)
{
    if (opts == NULL) {
        return ISO_NULL_POINTER;
    }
    opts->rockridge = enable ? 1 : 0;
    return ISO_SUCCESS;
}

int iso_write_opts_set_joliet(IsoWriteOpts *opts, int enable)
{
    if (opts == NULL) {
        return ISO_NULL_POINTER;
    }
    opts->joliet = enable ? 1 : 0;
    return ISO_SUCCESS;
}

int iso_write_opts_set_iso1999(IsoWriteOpts *opts, int enable)
{
    if (opts == NULL) {
        return ISO_NULL_POINTER;
    }
    opts->iso1999 = enable ? 1 : 0;
    return ISO_SUCCESS;
}

int iso_write_opts_set_hardlinks(IsoWriteOpts *opts, int enable)
{
    if (opts == NULL) {
        return ISO_NULL_POINTER;
    }
    opts->hardlinks = enable ? 1 : 0;
    return ISO_SUCCESS;
}

int iso_write_opts_set_aaip(IsoWriteOpts *opts, int enable)
{
    if (opts == NULL) {
        return ISO_NULL_POINTER;
    }
    opts->aaip = enable ? 1 : 0;
    return ISO_SUCCESS;
}

int iso_write_opts_set_old_empty(IsoWriteOpts *opts, int enable)
{
    if (opts == NULL) {
        return ISO_NULL_POINTER;
    }
    opts->old_empty = enable ? 1 : 0;
    return ISO_SUCCESS;
}

int iso_write_opts_set_untranslated_name_len(IsoWriteOpts *opts, int len)
{
    if (opts == NULL) {
        return ISO_NULL_POINTER;
    }
    if (len == -1)
        opts->untranslated_name_len = ISO_UNTRANSLATED_NAMES_MAX;
    else if(len == 0)
        opts->untranslated_name_len = 0;
    else if(len > ISO_UNTRANSLATED_NAMES_MAX || len < 0)
        return ISO_WRONG_ARG_VALUE;
    else
        opts->untranslated_name_len = len;
    return opts->untranslated_name_len;
}

int iso_write_opts_set_allow_dir_id_ext(IsoWriteOpts *opts, int allow)
{
    if (opts == NULL) {
        return ISO_NULL_POINTER;
    }
    opts->allow_dir_id_ext = allow ? 1 : 0;
    return ISO_SUCCESS;
}

int iso_write_opts_set_omit_version_numbers(IsoWriteOpts *opts, int omit)
{
    if (opts == NULL) {
        return ISO_NULL_POINTER;
    }
    opts->omit_version_numbers = omit & 3;
    return ISO_SUCCESS;
}

int iso_write_opts_set_allow_deep_paths(IsoWriteOpts *opts, int allow)
{
    if (opts == NULL) {
        return ISO_NULL_POINTER;
    }
    opts->allow_deep_paths = allow ? 1 : 0;
    return ISO_SUCCESS;
}

int iso_write_opts_set_allow_longer_paths(IsoWriteOpts *opts, int allow)
{
    if (opts == NULL) {
        return ISO_NULL_POINTER;
    }
    opts->allow_longer_paths = allow ? 1 : 0;
    return ISO_SUCCESS;
}

int iso_write_opts_set_max_37_char_filenames(IsoWriteOpts *opts, int allow)
{
    if (opts == NULL) {
        return ISO_NULL_POINTER;
    }
    opts->max_37_char_filenames = allow ? 1 : 0;
    return ISO_SUCCESS;
}

int iso_write_opts_set_no_force_dots(IsoWriteOpts *opts, int no)
{
    if (opts == NULL) {
        return ISO_NULL_POINTER;
    }
    opts->no_force_dots = no & 3;
    return ISO_SUCCESS;
}

int iso_write_opts_set_allow_lowercase(IsoWriteOpts *opts, int allow)
{
    if (opts == NULL) {
        return ISO_NULL_POINTER;
    }
    opts->allow_lowercase = allow ? 1 : 0;
    return ISO_SUCCESS;
}

int iso_write_opts_set_allow_full_ascii(IsoWriteOpts *opts, int allow)
{
    if (opts == NULL) {
        return ISO_NULL_POINTER;
    }
    opts->allow_full_ascii = allow ? 1 : 0;
    return ISO_SUCCESS;
}

int iso_write_opts_set_relaxed_vol_atts(IsoWriteOpts *opts, int allow)
{
    if (opts == NULL) {
        return ISO_NULL_POINTER;
    }
    opts->relaxed_vol_atts = allow ? 1 : 0;
    return ISO_SUCCESS;
}

int iso_write_opts_set_joliet_longer_paths(IsoWriteOpts *opts, int allow)
{
    if (opts == NULL) {
        return ISO_NULL_POINTER;
    }
    opts->joliet_longer_paths = allow ? 1 : 0;
    return ISO_SUCCESS;
}

int iso_write_opts_set_joliet_long_names(IsoWriteOpts *opts, int allow)
{
    if (opts == NULL) {
        return ISO_NULL_POINTER;
    }
    opts->joliet_long_names = allow ? 1 : 0;
    return ISO_SUCCESS;
}

int iso_write_opts_set_rrip_version_1_10(IsoWriteOpts *opts, int oldvers)
{
    if (opts == NULL) {
        return ISO_NULL_POINTER;
    }
    opts->rrip_version_1_10 = oldvers ? 1 : 0;
    return ISO_SUCCESS;
}

int iso_write_opts_set_rrip_1_10_px_ino(IsoWriteOpts *opts, int enable)
{
    if (opts == NULL) {
        return ISO_NULL_POINTER;
    }
    opts->rrip_1_10_px_ino = enable ? 1 : 0;
    return ISO_SUCCESS;
}

int iso_write_opts_set_aaip_susp_1_10(IsoWriteOpts *opts, int oldvers)
{
    if (opts == NULL) {
        return ISO_NULL_POINTER;
    }
    opts->aaip_susp_1_10 = oldvers ? 1 : 0;
    return ISO_SUCCESS;
}

int iso_write_opts_set_dir_rec_mtime(IsoWriteOpts *opts, int allow)
{
    if (opts == NULL) {
        return ISO_NULL_POINTER;
    }
    opts->dir_rec_mtime = allow ? 1 : 0;
    return ISO_SUCCESS;
}

int iso_write_opts_set_sort_files(IsoWriteOpts *opts, int sort)
{
    if (opts == NULL) {
        return ISO_NULL_POINTER;
    }
    opts->sort_files = sort ? 1 : 0;
    return ISO_SUCCESS;
}

int iso_write_opts_set_record_md5(IsoWriteOpts *opts, int session, int files)
{
    opts->md5_session_checksum = session & 1;
    opts->md5_file_checksums = files & 3;
    return ISO_SUCCESS;
}

int iso_write_opts_set_scdbackup_tag(IsoWriteOpts *opts,
                                     char *name, char *timestamp,
                                     char *tag_written)
{
    char eff_name[81], eff_time[19];
    int i;

    for (i = 0; name[i] != 0 && i < 80; i++)
         if (isspace((int) ((unsigned char *) name)[i]))
             eff_name[i] = '_';
         else
             eff_name[i] = name[i];
    if (i == 0)
        eff_name[i++] = '_';
    eff_name[i] = 0;
    for (i = 0; timestamp[i] != 0 && i < 18; i++)
         if (isspace((int) ((unsigned char *) timestamp)[i]))
             eff_time[i] = '_';
         else
             eff_time[i] = timestamp[i];
    if (i == 0)
        eff_time[i++] = '_';
    eff_time[i] = 0;

    sprintf(opts->scdbackup_tag_parm, "%s %s", eff_name, eff_time);

    opts->scdbackup_tag_written = tag_written;
    if (tag_written != NULL)
        tag_written[0] = 0;
    return ISO_SUCCESS;
}

int iso_write_opts_set_replace_mode(IsoWriteOpts *opts, int dir_mode,
                                    int file_mode, int uid, int gid)
{
    if (opts == NULL) {
        return ISO_NULL_POINTER;
    }
    if (dir_mode < 0 || dir_mode > 2) {
        return ISO_WRONG_ARG_VALUE;
    }
    if (file_mode < 0 || file_mode > 2) {
        return ISO_WRONG_ARG_VALUE;
    }
    if (uid < 0 || uid > 2) {
        return ISO_WRONG_ARG_VALUE;
    }
    if (gid < 0 || gid > 2) {
        return ISO_WRONG_ARG_VALUE;
    }
    opts->replace_dir_mode = dir_mode;
    opts->replace_file_mode = file_mode;
    opts->replace_uid = uid;
    opts->replace_gid = gid;
    return ISO_SUCCESS;
}

int iso_write_opts_set_default_dir_mode(IsoWriteOpts *opts, mode_t dir_mode)
{
    if (opts == NULL) {
        return ISO_NULL_POINTER;
    }
    opts->dir_mode = dir_mode;
    return ISO_SUCCESS;
}

int iso_write_opts_set_default_file_mode(IsoWriteOpts *opts, mode_t file_mode)
{
    if (opts == NULL) {
        return ISO_NULL_POINTER;
    }
    opts->file_mode = file_mode;
    return ISO_SUCCESS;
}

int iso_write_opts_set_default_uid(IsoWriteOpts *opts, uid_t uid)
{
    if (opts == NULL) {
        return ISO_NULL_POINTER;
    }
    opts->uid = uid;
    return ISO_SUCCESS;
}

int iso_write_opts_set_default_gid(IsoWriteOpts *opts, gid_t gid)
{
    if (opts == NULL) {
        return ISO_NULL_POINTER;
    }
    opts->gid = gid;
    return ISO_SUCCESS;
}

int iso_write_opts_set_replace_timestamps(IsoWriteOpts *opts, int replace)
{
    if (opts == NULL) {
        return ISO_NULL_POINTER;
    }
    if (replace < 0 || replace > 2) {
        return ISO_WRONG_ARG_VALUE;
    }
    opts->replace_timestamps = replace;
    return ISO_SUCCESS;
}

int iso_write_opts_set_default_timestamp(IsoWriteOpts *opts, time_t timestamp)
{
    if (opts == NULL) {
        return ISO_NULL_POINTER;
    }
    opts->timestamp = timestamp;
    return ISO_SUCCESS;
}

int iso_write_opts_set_always_gmt(IsoWriteOpts *opts, int gmt)
{
    if (opts == NULL) {
        return ISO_NULL_POINTER;
    }
    opts->always_gmt = gmt ? 1 : 0;
    return ISO_SUCCESS;
}

int iso_write_opts_set_output_charset(IsoWriteOpts *opts, const char *charset)
{
    if (opts == NULL) {
        return ISO_NULL_POINTER;
    }
    opts->output_charset = charset ? strdup(charset) : NULL;
    return ISO_SUCCESS;
}

int iso_write_opts_set_appendable(IsoWriteOpts *opts, int appendable)
{
    if (opts == NULL) {
        return ISO_NULL_POINTER;
    }
    opts->appendable = appendable ? 1 : 0;
    return ISO_SUCCESS;
}

int iso_write_opts_set_ms_block(IsoWriteOpts *opts, uint32_t ms_block)
{
    if (opts == NULL) {
        return ISO_NULL_POINTER;
    }
    opts->ms_block = ms_block;
    return ISO_SUCCESS;
}

int iso_write_opts_set_overwrite_buf(IsoWriteOpts *opts, uint8_t *overwrite)
{
    if (opts == NULL) {
        return ISO_NULL_POINTER;
    }
    opts->overwrite = overwrite;
    return ISO_SUCCESS;
}

int iso_write_opts_set_fifo_size(IsoWriteOpts *opts, size_t fifo_size)
{
    if (opts == NULL) {
        return ISO_NULL_POINTER;
    }
    if (fifo_size < 32) {
        return ISO_WRONG_ARG_VALUE;
    }
    opts->fifo_size = fifo_size;
    return ISO_SUCCESS;
}

int iso_write_opts_get_data_start(IsoWriteOpts *opts, uint32_t *data_start,
                                  int flag)
{
    if (opts->data_start_lba == 0)
	return ISO_ERROR;
    *data_start = opts->data_start_lba;
    return ISO_SUCCESS;
}

/*
 * @param data     Either NULL or 32 kB of data. Do not submit less bytes !
 * @param options 
 *        Can cause manipulations of submitted data before they get written:
 *        bit0= apply a --protective-msdos-label as of grub-mkisofs.
 *              This means to patch bytes 446 to 512 of the system area so
 *              that one partition is defined which begins at the second
 *              512-byte block of the image and ends where the image ends.
 *              This works with and without system_area_data.
 *        bit1= apply isohybrid MBR patching to the system area.
 *              This works only with system area data from SYSLINUX plus an
 *              ISOLINUX boot image (see iso_image_set_boot_image()) and
 *              only if not bit0 is set.
 *        bit2-7= System area type
 *              0= PC-BIOS DOS MBR
 *              1= MIPS Big Endian Volume Header
 * @param flag     bit0 = invalidate any attached system area data
 *                        same as data == NULL
 *                 bit1 = keep data unaltered
 *                 bit2 = keep options unaltered
 */
int iso_write_opts_set_system_area(IsoWriteOpts *opts, char data[32768],
                                   int options, int flag)
{
    if (data == NULL || (flag & 1)) { /* Disable */
        if (opts->system_area_data != NULL)
            free(opts->system_area_data);
        opts->system_area_data = NULL;
    } else if (!(flag & 2)) {
        if (opts->system_area_data == NULL) {
            opts->system_area_data = calloc(32768, 1);
            if (opts->system_area_data == NULL)
                return ISO_OUT_OF_MEM;
        }
        memcpy(opts->system_area_data, data, 32768);
    }
    if (!(flag & 4))
        opts->system_area_options = options & 0x3ff;
    return ISO_SUCCESS;
}

int iso_write_opts_set_pvd_times(IsoWriteOpts *opts, 
                        time_t vol_creation_time, time_t vol_modification_time,
                        time_t vol_expiration_time, time_t vol_effective_time,
                        char *vol_uuid)
{
    opts->vol_creation_time = vol_creation_time;
    opts->vol_modification_time = vol_modification_time;
    opts->vol_expiration_time = vol_expiration_time;
    opts->vol_effective_time = vol_effective_time;
    strncpy(opts->vol_uuid, vol_uuid, 16);
    opts->vol_uuid[16] = 0;
    return ISO_SUCCESS;
}

int iso_write_opts_set_part_offset(IsoWriteOpts *opts,
                                   uint32_t block_offset_2k,
                                   int secs_512_per_head, int heads_per_cyl)
{
    if (block_offset_2k > 0 && block_offset_2k < 16)
        return ISO_PART_OFFST_TOO_SMALL;
    opts->partition_offset = block_offset_2k;
    opts->partition_secs_per_head = secs_512_per_head;
    opts->partition_heads_per_cyl = heads_per_cyl;
    return ISO_SUCCESS;
}

int iso_write_opts_attach_jte(IsoWriteOpts *opts, void *libjte_handle)
{
#ifdef Libisofs_with_libjtE

    opts->libjte_handle = libjte_handle;
    return ISO_SUCCESS;

#else

    return ISO_LIBJTE_NOT_ENABLED;

#endif /* Libisofs_with_libjtE */
}

int iso_write_opts_detach_jte(IsoWriteOpts *opts, void **libjte_handle)
{
#ifdef Libisofs_with_libjtE

    if (*libjte_handle != NULL)
        *libjte_handle = opts->libjte_handle;
    opts->libjte_handle = NULL;
    return ISO_SUCCESS;

#else

    return ISO_LIBJTE_NOT_ENABLED;

#endif /* Libisofs_with_libjtE */
}
 
int iso_write_opts_set_tail_blocks(IsoWriteOpts *opts, uint32_t num_blocks)
{
    opts->tail_blocks = num_blocks;
    return ISO_SUCCESS;
}

int iso_write_opts_set_partition_img(IsoWriteOpts *opts, int partition_number,
                            uint8_t partition_type, char *image_path, int flag)
{
    if (partition_number < 1 || partition_number > ISO_MAX_PARTITIONS)
        return ISO_BAD_PARTITION_NO;

    if (opts->appended_partitions[partition_number - 1] != NULL)
        free(opts->appended_partitions[partition_number - 1]);
    opts->appended_partitions[partition_number - 1] = strdup(image_path);
    if (opts->appended_partitions[partition_number - 1] == NULL)
        return ISO_OUT_OF_MEM;
    opts->appended_part_types[partition_number - 1] = partition_type;

    return ISO_SUCCESS;
}

int iso_write_opts_set_disc_label(IsoWriteOpts *opts, char *label)
{
    strncpy(opts->ascii_disc_label, label, ISO_DISC_LABEL_SIZE - 1);
    opts->ascii_disc_label[ISO_DISC_LABEL_SIZE - 1] = 0;
    return ISO_SUCCESS;
}

