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#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "heap.h"
#include "vfs.h"
`static struct vfs_node *new_node(void)
{
struct vfs_node *ret = kmalloc(sizeof(struct vfs_node));
memset(ret, 0, sizeof(struct vfs_node));
return ret;
}
struct vfs_node *vfs_init(void)
{
struct vfs_node *root = new_node();
root->flags = VFS_DIR;
root->name = malloc(1);
root->name[0] = '\0';
return root;
}
int vfs_mkdir(struct vfs_node *node, const char *name)
{
if(!node)
return 0;
if((node->flags & VFS_TYPEMASK) != VFS_DIR)
return 0;
/* insert a new element at the beginning of the linked list of the directory's children */
struct vfs_node *newdir = new_node();
newdir->flags = VFS_DIR;
newdir->name = strdup(name);
newdir->parent = node;
newdir->next = node->child;
node->child = newdir;
return 1;
}
int vfs_creat(struct vfs_node *node, const char *name)
{
if(!node)
return 0;
if((node->flags & VFS_TYPEMASK) != VFS_DIR)
return 0;
struct vfs_node *newfile = new_node();
newfile->flags = VFS_REG;
newfile->name = strdup(name);
newfile->parent = node;
newfile->next = node->child;
node->child = newfile;
return 1;
}
DIR *vfs_opendir(struct vfs_node *node)
{
DIR *dirp = malloc(sizeof(DIR));
dirp->node = node->child;
return dirp;
}
struct dirent *vfs_readdir(DIR *dirp)
{
if(!dirp->node)
return NULL;
static struct dirent ret;
memcpy(ret.d_name, dirp->node->name, MIN(strlen(dirp->node->name)+1, sizeof(ret.d_name)));
switch(dirp->node->flags & VFS_TYPEMASK)
{
case VFS_DIR:
ret.d_type = DT_DIR;
break;
case VFS_REG:
ret.d_type = DT_REG;
break;
/* fall through */
case VFS_SPEC:
default:
ret.d_type = DT_UNKNOWN;
}
dirp->node = dirp->node->next;
return &ret;
}
char *vfs_path(struct vfs_node *node)
{
struct vfs_node *
}
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