libburnia/libisofs
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Encapsulate insertion of nodes in node.c. Define replace behavior.

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This commit is contained in:
Vreixo Formoso
2008-01-12 18:03:59 +01:00
parent bff5cb9333
commit f118b0a48d
4 changed files with 151 additions and 108 deletions
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94
src/node.c
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@ -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;