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#include <stdint.h>
#include <stddef.h>
#include <kernel/fs/vfs.h>
#include <kernel/fs/ext2.h>
#include <kernel/lib/stdlib.h>
#include <kernel/memory/alloc.h>
#include <kernel/system.h>
struct tree *fs_tree;
struct fs_node *fs_root = NULL;
uint32_t fs_read(struct fs_node *node, uint32_t offset, uint32_t size, char *buf)
{
if (node->read != NULL)
return node->read(node, offset, size, buf);
else
return 0;
}
uint32_t fs_write(struct fs_node *node, uint32_t offset, uint32_t size, char *buf)
{
if (node->write != NULL)
return node->write(node, offset, size, buf);
else
return 0;
}
void fs_open(struct fs_node *node)
{
if (node->open != NULL)
node->open(node);
else // TODO: Better ext2 default open workaround
fs_root->open(node);
}
void fs_close(struct fs_node *node)
{
if (node->close != NULL)
node->close(node);
else
fs_root->open(node);
}
struct dirent *fs_read_dir(struct fs_node *node, uint32_t index)
{
if ((node->type & DIR_NODE) != 0 && node->find_dir != NULL)
return node->read_dir(node, index);
else
return (struct dirent *)NULL;
}
struct fs_node *fs_find_dir(struct fs_node *node, char *name)
{
if ((node->type & DIR_NODE) != 0 && node->find_dir != NULL)
return node->find_dir(node, name);
else
return (struct fs_node *)NULL;
}
// TODO: This should be somewhere else ig
char *next_str(char *str)
{
str = &str[strlen(str)];
int i = 0;
while (str[i] == 0)
i++;
return &str[i];
}
// By far not the fastest algorithm
struct fs_node *fs_path(struct fs_node *node, char *name)
{
if (name[0] == '/')
return node;
char *cpy = (char *)kmalloc(strlen(name) + 2);
strcpy(cpy, name);
cpy[strlen(name) + 1] = 1;
name = cpy;
char *end = &name[strlen(name)];
int len = strlen(name);
for (int i = 0; i < len; i++)
if (name[i] == '/')
name[i] = 0;
if (strlen(name) == 0)
name = next_str(name);
do {
node = node->node_ptr;
while (node != NULL) {
if (strcmp(node->name, name) == 0)
break;
node = node->link;
}
if (node == NULL) {
kfree(cpy);
return NULL;
}
name = next_str(name);
} while ((uint32_t)name < (uint32_t)end);
kfree(cpy);
return node;
}
void vfs_ls(char *path)
{
struct fs_node *dir = fs_path(fs_root, path);
if (dir == NULL) {
warn("Invalid path");
return;
}
struct fs_node *link = dir->node_ptr;
log("Listing for %s", path);
while (link != NULL) {
log(link->name);
link = link->link;
}
}
struct fs_node *vfs_get_dir(struct fs_node *node, char *name)
{
char *cpy = (char *)kmalloc(strlen(name) + 2);
char *ref = cpy;
strcpy(cpy, name);
cpy[strlen(name) + 1] = 1;
name = cpy;
for (int i = strlen(name); i >= 0; i--)
if (name[i] == '/') {
name[i] = 0;
break;
}
struct fs_node *output;
if (strlen(name) == 0)
output = fs_root;
else
output = fs_path(node, name);
kfree(ref);
return output;
}
char *basename(char *name)
{
for (int i = strlen(name); i >= 0; i--)
if (name[i] == '/')
return &name[i + 1];
return name;
}
// TODO: Implement file touching in ext2
struct fs_node *vfs_touch(struct fs_node *node, char *name)
{
struct fs_node *dir = vfs_get_dir(node, name);
if (dir == NULL)
return NULL;
struct fs_node *file = (struct fs_node *)kmalloc(sizeof(struct fs_node));
ext2_node_init(file);
file->type = FILE_NODE;
strcpy(file->name, basename(name));
//ext2_file *entry = ext2_new_file();
//strcpy(file->name, entry->name);
file->link = dir->node_ptr;
dir->node_ptr = file;
return file;
}
struct fs_node *vfs_mkdir(struct fs_node *node, char *name)
{
struct fs_node *dir = vfs_get_dir(node, name);
if (dir == NULL) {
warn("Invalid path");
return NULL;
}
struct fs_node *file = (struct fs_node *)kmalloc(sizeof(struct fs_node));
ext2_node_init(file);
file->type = DIR_NODE;
strcpy(file->name, basename(name));
file->link = dir->node_ptr;
dir->node_ptr = file;
return file;
}
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