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Begin Joliet support. Creation of Joliet writer and Joliet tree.

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This commit is contained in:
Vreixo Formoso 2008-01-06 17:38:31 +01:00
parent 355d28292f
commit 17e9955f93
6 changed files with 391 additions and 1 deletions
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2
Makefile.am
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@ -44,6 +44,8 @@ src_libisofs_la_SOURCES = \
src/rockridge.h \
src/rockridge.c \
src/rockridge_read.c \
src/joliet.h \
src/joliet.c \
src/data_source.c
libinclude_HEADERS = \
src/libisofs.h

7
src/ecma119.c
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@ -26,6 +26,12 @@
#include <locale.h>
#include <langinfo.h>
/*
* TODO 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)
{
@ -822,6 +828,7 @@ int ecma119_image_new(IsoImage *src, Ecma119WriteOpts *opts, Ecma119Image **img)
target->ino = 0;
target->omit_version_numbers = opts->omit_version_numbers;
target->allow_deep_paths = opts->allow_deep_paths;
target->joliet_longer_paths = 0; //TODO
target->sort_files = opts->sort_files;
target->replace_uid = opts->replace_uid ? 1 : 0;

3
src/ecma119.h
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@ -36,6 +36,9 @@ struct ecma119_image
/* relaxed constraints */
unsigned int omit_version_numbers :1;
unsigned int allow_deep_paths :1;
/** Allow paths on Joliet tree to be larger than 240 bytes */
unsigned int joliet_longer_paths :1;
// int relaxed_constraints; /**< see ecma119_relaxed_constraints_flag */
/*

2
src/ecma119_tree.h
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@ -21,7 +21,7 @@ enum ecma119_node_type {
};
/**
* Struct with info about a node representing a tree
* Struct with info about a node representing a directory
*/
struct ecma119_dir_info
{

318
src/joliet.c Normal file
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@ -0,0 +1,318 @@
/*
* Copyright (c) 2007 Vreixo Formoso
* Copyright (c) 2007 Mario Danic
*
* 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 as
* published by the Free Software Foundation. See COPYING file for details.
*/
#include "joliet.h"
#include "messages.h"
#include "writer.h"
#include "error.h"
#include "image.h"
#include "filesrc.h"
#include <stdlib.h>
static
int get_joliet_name(Ecma119Image *t, IsoNode *iso, uint16_t **name)
{
int ret;
uint16_t *ucs_name;
uint16_t *jname = NULL;
if (iso->name == NULL) {
/* it is not necessarily an error, it can be the root */
return ISO_SUCCESS;
}
ret = str2ucs(t->input_charset, iso->name, &ucs_name);
if (ret < 0) {
iso_msg_debug(t->image->messenger, "Can't convert %s", iso->name);
return ret;
}
// TODO add support for relaxed constraints
jname = iso_j_id(ucs_name);
free(ucs_name);
if (jname != NULL) {
*name = jname;
return ISO_SUCCESS;
} else {
/*
* only possible if mem error, as check for empty names is done
* in public tree
*/
return ISO_MEM_ERROR;
}
}
static
void joliet_node_free(JolietNode *node)
{
if (node == NULL) {
return;
}
if (node->type == JOLIET_DIR) {
int i;
for (i = 0; i < node->info.dir.nchildren; i++) {
joliet_node_free(node->info.dir.children[i]);
}
free(node->info.dir.children);
//free(node->info.dir);
}
iso_node_unref(node->node);
free(node);
}
/**
* Create a low level Joliet node
* @return
* 1 success, 0 ignored, < 0 error
*/
static
int create_node(Ecma119Image *t, IsoNode *iso, JolietNode **node)
{
int ret;
JolietNode *joliet;
joliet = calloc(1, sizeof(JolietNode));
if (joliet == NULL) {
return ISO_MEM_ERROR;
}
if (iso->type == LIBISO_DIR) {
IsoDir *dir = (IsoDir*) iso;
joliet->info.dir.children = calloc(sizeof(void*), dir->nchildren);
if (joliet->info.dir.children == NULL) {
free(joliet);
return ISO_MEM_ERROR;
}
joliet->type = JOLIET_DIR;
} else if (iso->type == LIBISO_FILE) {
/* it's a file */
off_t size;
IsoFileSrc *src;
IsoFile *file = (IsoFile*) iso;
size = iso_stream_get_size(file->stream);
if (size > (off_t)0xffffffff) {
iso_msg_note(t->image->messenger, LIBISO_FILE_IGNORED,
"File \"%s\" can't be added to image because is "
"greater than 4GB", iso->name);
free(joliet);
return 0;
}
ret = iso_file_src_create(t, file, &src);
if (ret < 0) {
free(joliet);
return ret;
}
joliet->info.file = src;
joliet->type = JOLIET_FILE;
} else {
/* should never happen */
//TODO handle boot nodes?!?
free(joliet);
return ISO_ERROR;
}
/* take a ref to the IsoNode */
joliet->node = iso;
iso_node_ref(iso);
return ISO_SUCCESS;
}
/**
* Create the low level Joliet tree from the high level ISO tree.
*
* @return
* 1 success, 0 file ignored, < 0 error
*/
static
int create_tree(Ecma119Image *t, IsoNode *iso, JolietNode **tree, int pathlen)
{
int ret, max_path;
JolietNode *node;
uint16_t *jname = NULL;
if (t == NULL || iso == NULL || tree == NULL) {
return ISO_NULL_POINTER;
}
if (iso->hidden & LIBISO_HIDE_ON_JOLIET) {
/* file will be ignored */
return 0;
}
ret = get_joliet_name(t, iso, &jname);
if (ret < 0) {
return ret;
}
max_path = pathlen + 1 + (jname ? ucslen(jname) * 2 : 0);
if (!t->joliet_longer_paths && max_path > 240) {
/*
* Wow!! Joliet is even more restrictive than plain ISO-9660,
* that allows up to 255 bytes!!
*/
iso_msg_note(t->image->messenger, LIBISO_FILE_IGNORED,
"File \"%s\" can't be added to Joliet tree, because "
"its path length is larger than 240", iso->name);
free(jname);
return 0;
}
switch (iso->type) {
case LIBISO_FILE:
ret = create_node(t, iso, &node);
break;
case LIBISO_DIR:
{
IsoNode *pos;
IsoDir *dir = (IsoDir*)iso;
ret = create_node(t, iso, &node);
if (ret < 0) {
free(jname);
return ret;
}
pos = dir->children;
while (pos) {
int cret;
JolietNode *child;
cret = create_tree(t, pos, &child, max_path);
if (cret < 0) {
/* error */
joliet_node_free(node);
ret = cret;
break;
} else if (cret == ISO_SUCCESS) {
/* add child to this node */
int nchildren = node->info.dir.nchildren++;
node->info.dir.children[nchildren] = child;
child->parent = node;
}
pos = pos->next;
}
}
break;
case LIBISO_BOOT:
//TODO
return 0;
break;
case LIBISO_SYMLINK:
case LIBISO_SPECIAL:
iso_msg_note(t->image->messenger, LIBISO_JOLIET_WRONG_FILE_TYPE,
"Can't add %s to Joliet tree. This kind of files can only"
" be added to a Rock Ridget tree. Skipping.", iso->name);
ret = 0;
break;
default:
/* should never happen */
return ISO_ERROR;
}
if (ret <= 0) {
free(jname);
return ret;
}
node->name = jname;
*tree = node;
return ISO_SUCCESS;
}
static
int joliet_tree_create(IsoImageWriter *writer)
{
int ret;
JolietNode *root;
Ecma119Image *t;
if (writer == NULL || writer->target == NULL) {
return ISO_NULL_POINTER;
}
t = writer->target;
ret = create_tree(t, (IsoNode*)t->image->root, &root, 0);
if (ret <= 0) {
if (ret == 0) {
/* unexpected error, root ignored!! This can't happen */
ret = ISO_ERROR;
}
return ret;
}
/* the Joliet tree is stored in the writer data field */
writer->data = root;
iso_msg_debug(t->image->messenger, "Sorting the Joliet tree...");
//TODO sort_tree(root);
iso_msg_debug(t->image->messenger, "Mangling Joliet names...");
// TODO ret = mangle_tree(writer, 1);
return ISO_SUCCESS;
}
static
int joliet_writer_compute_data_blocks(IsoImageWriter *writer)
{
//TODO
return -1;
}
static
int joliet_writer_write_vol_desc(IsoImageWriter *writer)
{
//TODO
return -1;
}
static
int joliet_writer_write_data(IsoImageWriter *writer)
{
//TODO
return -1;
}
static
int joliet_writer_free_data(IsoImageWriter *writer)
{
/* free the Joliet tree */
joliet_node_free(writer->data);
return ISO_SUCCESS;
}
int joliet_writer_create(Ecma119Image *target)
{
int ret;
IsoImageWriter *writer;
writer = malloc(sizeof(IsoImageWriter));
if (writer == NULL) {
return ISO_MEM_ERROR;
}
writer->compute_data_blocks = joliet_writer_compute_data_blocks;
writer->write_vol_desc = joliet_writer_write_vol_desc;
writer->write_data = joliet_writer_write_data;
writer->free_data = joliet_writer_free_data;
writer->data = NULL; //TODO store joliet tree here
writer->target = target;
iso_msg_debug(target->image->messenger,
"Creating low level Joliet tree...");
ret = joliet_tree_create(writer);
if (ret < 0) {
return ret;
}
/* add this writer to image */
target->writers[target->nwriters++] = writer;
/* we need the volume descriptor */
target->curblock++;
return ISO_SUCCESS;
}

60
src/joliet.h Normal file
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@ -0,0 +1,60 @@
/*
* Copyright (c) 2007 Vreixo Formoso
* Copyright (c) 2007 Mario Danic
*
* 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 as
* published by the Free Software Foundation. See COPYING file for details.
*/
/**
* Declare Joliet related structures.
*/
#ifndef LIBISO_JOLIET_H
#define LIBISO_JOLIET_H
#include "libisofs.h"
#include "ecma119.h"
typedef struct joliet_node JolietNode;
enum joliet_node_type {
JOLIET_FILE,
JOLIET_DIR
};
struct joliet_dir_info {
JolietNode **children;
size_t nchildren;
size_t len;
size_t block;
};
struct joliet_node
{
uint16_t *name; /**< Name in UCS-2BE. */
//size_t dirent_len;
JolietNode *parent;
IsoNode *node; /*< reference to the iso node */
enum joliet_node_type type;
union {
IsoFileSrc *file;
//TODO change with a pointer
struct joliet_dir_info dir;
} info;
};
/**
* Create a IsoWriter to deal with Joliet estructures, and add it to the given
* target.
*
* @return
* 1 on success, < 0 on error
*/
int joliet_writer_create(Ecma119Image *target);
#endif /* LIBISO_JOLIET_H */