libburnia
/
libisofs
2
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Encapsulate insertion of nodes in node.c. Define replace behavior.

Browse Source
release-1.5.4.branch
Vreixo Formoso 15 years ago
parent bff5cb9333
commit f118b0a48d
4 changed files with 151 additions and 108 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Show Stats Download Patch File Download Diff File
  1. 31
      src/libisofs.h
  2. 94
      src/node.c
  3. 46
      src/node.h
  4. 88
      src/tree.c

31
src/libisofs.h
Unescape View File

@ -68,6 +68,27 @@ enum eltorito_boot_media_type {
ELTORITO_NO_EMUL
};
/**
* Replace mode used when addding a node to a file.
* TODO comment
*/
enum iso_replace_mode {
/**
* Never replace an existing node, and instead fail with
* ISO_NODE_NAME_NOT_UNIQUE.
*/
ISO_REPLACE_NEVER,
/**
* Always replace the old node with the new.
*/
ISO_REPLACE_ALWAYS
/*
* TODO #00006 define more values
* -to replace only if both are the same kind of file
* -if both are dirs, add contents (and what to do with conflicts?)
*/
};
/**
* Holds the options for the image generation.
*/
@ -770,11 +791,6 @@ void iso_node_set_hidden(IsoNode *node, int hide_attrs);
* @param replace
* if the dir already contains a node with the same name, whether to
* replace or not the old node with this.
* - 0 not replace (will fail with ISO_NODE_NAME_NOT_UNIQUE)
* - 1 replace
* TODO #00006 define more values
* to replace only if both are the same kind of file
* if both are dirs, add contents (and what to do with conflicts?)
* @return
* number of nodes in dir if succes, < 0 otherwise
* Possible errors:
@ -783,7 +799,8 @@ void iso_node_set_hidden(IsoNode *node, int hide_attrs);
* ISO_NODE_NAME_NOT_UNIQUE, a node with same name already exists
* ISO_WRONG_ARG_VALUE, if child == dir, or replace != (0,1)
*/
int iso_dir_add_node(IsoDir *dir, IsoNode *child, int replace);
int iso_dir_add_node(IsoDir *dir, IsoNode *child,
enum iso_replace_mode replace);
/**
* Locate a node inside a given dir.
@ -1251,7 +1268,7 @@ int iso_image_obtain_msgs(IsoImage *image, char *minimum_severity,
/**
* Return the messenger object handle used by the given image. This handle
* may be used by related libraries to replace their own compatible
* may be used by related libraries to their own compatible
* messenger objects and thus to direct their messages to the libisofs
* message queue. See also: libburn, API function burn_set_messenger().
*

94
src/node.c
Unescape View File

@ -259,10 +259,14 @@ void iso_node_set_hidden(IsoNode *node, int hide_attrs)
* to other dir, and that the node name is unique inside the child.
* Otherwise this function will return a failure, and the child won't be
* inserted.
* @param replace
* if the dir already contains a node with the same name, whether to
* replace or not the old node with this.
* @return
* number of nodes in dir if succes, < 0 otherwise
*/
int iso_dir_add_node(IsoDir *dir, IsoNode *child, int replace)
int iso_dir_add_node(IsoDir *dir, IsoNode *child,
enum iso_replace_mode replace)
{
IsoNode **pos;
@ -281,32 +285,8 @@ int iso_dir_add_node(IsoDir *dir, IsoNode *child, int replace)
return ISO_NODE_ALREADY_ADDED;
}
pos = &(dir->children);
while (*pos != NULL && strcmp((*pos)->name, child->name) < 0) {
pos = &((*pos)->next);
}
if (*pos != NULL && !strcmp((*pos)->name, child->name)) {
/* a node with same name already exists */
if (replace == 0) {
return ISO_NODE_NAME_NOT_UNIQUE;
} else if (replace == 1) {
child->next = (*pos)->next;
(*pos)->parent = NULL;
(*pos)->next = NULL;
iso_node_unref(*pos);
*pos = child;
child->parent = dir;
return dir->nchildren;
} else {
return ISO_WRONG_ARG_VALUE;
}
}
child->next = *pos;
*pos = child;
child->parent = dir;
return ++dir->nchildren;
iso_dir_find(dir, child->name, &pos);
return iso_dir_insert(dir, child, pos, replace);
}
/**
@ -328,17 +308,14 @@ int iso_dir_add_node(IsoDir *dir, IsoNode *child, int replace)
*/
int iso_dir_get_node(IsoDir *dir, const char *name, IsoNode **node)
{
IsoNode *pos;
int ret;
IsoNode **pos;
if (dir == NULL || name == NULL) {
return ISO_NULL_POINTER;
}
pos = dir->children;
while (pos != NULL && strcmp(pos->name, name) < 0) {
pos = pos->next;
}
if (pos == NULL || strcmp(pos->name, name)) {
ret = iso_dir_exists(dir, name, &pos);
if (ret == 0) {
if (node) {
*node = NULL;
}
@ -346,7 +323,7 @@ int iso_dir_get_node(IsoDir *dir, const char *name, IsoNode **node)
}
if (node) {
*node = pos;
*node = *pos;
}
return 1;
}
@ -686,6 +663,53 @@ int iso_node_is_valid_link_dest(const char *dest)
return ret;
}
void iso_dir_find(IsoDir *dir, const char *name, IsoNode ***pos)
{
*pos = &(dir->children);
while (**pos != NULL && strcmp((**pos)->name, name) < 0) {
*pos = &((**pos)->next);
}
}
int iso_dir_exists(IsoDir *dir, const char *name, IsoNode ***pos)
{
IsoNode **node;
iso_dir_find(dir, name, &node);
if (pos) {
*pos = node;
}
return (*node != NULL && !strcmp((*node)->name, name)) ? 1 : 0;
}
int iso_dir_insert(IsoDir *dir, IsoNode *node, IsoNode **pos,
enum iso_replace_mode replace)
{
if (*pos != NULL && !strcmp((*pos)->name, node->name)) {
/* a node with same name already exists */
if (replace == ISO_REPLACE_NEVER) {
return ISO_NODE_NAME_NOT_UNIQUE;
} else if (replace == ISO_REPLACE_ALWAYS) {
node->next = (*pos)->next;
(*pos)->parent = NULL;
(*pos)->next = NULL;
iso_node_unref(*pos);
*pos = node;
node->parent = dir;
return dir->nchildren;
} else {
/* CAN'T HAPPEN */
return ISO_WRONG_ARG_VALUE;
}
}
node->next = *pos;
*pos = node;
node->parent = dir;
return ++dir->nchildren;
}
int iso_node_new_root(IsoDir **root)
{
IsoDir *dir;

46
src/node.h
Unescape View File

@ -123,4 +123,50 @@ int iso_node_is_valid_name(const char *name);
*/
int iso_node_is_valid_link_dest(const char *dest);
/**
* Find the position where to insert a node
*
* @param dir
* A valid dir. It can't be NULL
* @param name
* The node name to search for. It can't be NULL
* @param pos
* Will be filled with the position where to insert. It can't be NULL
*/
void iso_dir_find(IsoDir *dir, const char *name, IsoNode ***pos);
/**
* Check if a node with the given name exists in a dir.
*
* @param dir
* A valid dir. It can't be NULL
* @param name
* The node name to search for. It can't be NULL
* @param pos
* If not NULL, will be filled with the position where to insert. If the
* node exists, (**pos) will refer to the given node.
* @return
* 1 if node exists, 0 if not
*/
int iso_dir_exists(IsoDir *dir, const char *name, IsoNode ***pos);
/**
* Inserts a given node in a dir, at the specified position.
*
* @param dir
* Dir where to insert. It can't be NULL
* @param node
* The node to insert. It can't be NULL
* @param pos
* Position where the node will be inserted. It is a pointer previously
* obtained with a call to iso_dir_exists() or iso_dir_find().
* It can't be NULL.
* @param replace
* Whether to replace an old node with the same name with the new node.
* @return
* If success, number of children in dir. < 0 on error
*/
int iso_dir_insert(IsoDir *dir, IsoNode *node, IsoNode **pos,
enum iso_replace_mode replace);
#endif /*LIBISO_NODE_H_*/

88
src/tree.c
Unescape View File

@ -62,12 +62,8 @@ int iso_tree_add_new_dir(IsoDir *parent, const char *name, IsoDir **dir)
return ISO_WRONG_ARG_VALUE;
}
/* find place where to insert */
pos = &(parent->children);
while (*pos != NULL && strcmp((*pos)->name, name) < 0) {
pos = &((*pos)->next);
}
if (*pos != NULL && !strcmp((*pos)->name, name)) {
/* find place where to insert and check if it exists */
if (iso_dir_exists(parent, name, &pos)) {
/* a node with same name already exists */
return ISO_NODE_NAME_NOT_UNIQUE;
}
@ -97,15 +93,12 @@ int iso_tree_add_new_dir(IsoDir *parent, const char *name, IsoDir **dir)
node->node.ctime = now;
node->node.mtime = now;
/* add to dir */
node->node.parent = parent;
node->node.next = *pos;
*pos = (IsoNode*)node;
if (dir) {
*dir = node;
}
return ++parent->nchildren;
/* add to dir */
return iso_dir_insert(parent, (IsoNode*)node, pos, ISO_REPLACE_NEVER);
}
/**
@ -158,11 +151,7 @@ int iso_tree_add_new_symlink(IsoDir *parent, const char *name,
}
/* find place where to insert */
pos = &(parent->children);
while (*pos != NULL && strcmp((*pos)->name, name) < 0) {
pos = &((*pos)->next);
}
if (*pos != NULL && !strcmp((*pos)->name, name)) {
if (iso_dir_exists(parent, name, &pos)) {
/* a node with same name already exists */
return ISO_NODE_NAME_NOT_UNIQUE;
}
@ -199,15 +188,12 @@ int iso_tree_add_new_symlink(IsoDir *parent, const char *name,
node->node.ctime = now;
node->node.mtime = now;
/* add to dir */
node->node.parent = parent;
node->node.next = *pos;
*pos = (IsoNode*)node;
if (link) {
*link = node;
}
return ++parent->nchildren;
/* add to dir */
return iso_dir_insert(parent, (IsoNode*)node, pos, ISO_REPLACE_NEVER);
}
/**
@ -271,11 +257,7 @@ int iso_tree_add_new_special(IsoDir *parent, const char *name, mode_t mode,
}
/* find place where to insert */
pos = &(parent->children);
while (*pos != NULL && strcmp((*pos)->name, name) < 0) {
pos = &((*pos)->next);
}
if (*pos != NULL && !strcmp((*pos)->name, name)) {
if (iso_dir_exists(parent, name, &pos)) {
/* a node with same name already exists */
return ISO_NODE_NAME_NOT_UNIQUE;
}
@ -307,15 +289,12 @@ int iso_tree_add_new_special(IsoDir *parent, const char *name, mode_t mode,
node->node.ctime = now;
node->node.mtime = now;
/* add to dir */
node->node.parent = parent;
node->node.next = *pos;
*pos = (IsoNode*)node;
if (special) {
*special = node;
}
return ++parent->nchildren;
/* add to dir */
return iso_dir_insert(parent, (IsoNode*)node, pos, ISO_REPLACE_NEVER);
}
/**
@ -395,30 +374,24 @@ int iso_tree_add_node_builder(IsoImage *image, IsoDir *parent,
name = iso_file_source_get_name(src);
/* find place where to insert */
pos = &(parent->children);
while (*pos != NULL && strcmp((*pos)->name, name) < 0) {
pos = &((*pos)->next);
}
if (*pos != NULL && !strcmp((*pos)->name, name)) {
result = iso_dir_exists(parent, name, &pos);
free(name);
if (result) {
/* a node with same name already exists */
return ISO_NODE_NAME_NOT_UNIQUE;
}
free(name);
result = builder->create_node(builder, image, src, &new);
if (result < 0) {
return result;
}
/* finally, add node to parent */
new->parent = parent;
new->next = *pos;
*pos = new;
if (node) {
*node = new;
}
return ++parent->nchildren;
/* finally, add node to parent */
return iso_dir_insert(parent, (IsoNode*)new, pos, ISO_REPLACE_NEVER);
}
int iso_tree_add_node(IsoImage *image, IsoDir *parent, const char *path,
@ -513,11 +486,7 @@ int iso_add_dir_src_rec(IsoImage *image, IsoDir *parent, IsoFileSource *dir)
/* find place where to insert */
flag = 0;
pos = &(parent->children);
while (*pos != NULL && strcmp((*pos)->name, name) < 0) {
pos = &((*pos)->next);
}
if (*pos != NULL && !strcmp((*pos)->name, name)) {
if (iso_dir_exists(parent, name, &pos)) {
flag = 1;
if (action == 1 && image->recOpts.replace == 0) {
action = 2;
@ -569,21 +538,8 @@ int iso_add_dir_src_rec(IsoImage *image, IsoDir *parent, IsoFileSource *dir)
}
/* ok, node has correctly created, we need to add it */
if (flag) {
/* replace node */
new->next = (*pos)->next;
(*pos)->parent = NULL;
(*pos)->next = NULL;
iso_node_unref(*pos);
*pos = new;
new->parent = parent;
} else {
/* just add */
new->next = *pos;
*pos = new;
new->parent = parent;
++parent->nchildren;
}
iso_dir_insert(parent, new, pos, flag ? ISO_REPLACE_ALWAYS :
ISO_REPLACE_NEVER);
/* finally, if the node is a directory we need to recurse */
if (new->type == LIBISO_DIR) {

Write Preview
Loading…
Cancel
Save