* Copyright 2020 Suhel Mehta, mehtasuhel@gmail.com
* All rights reserved. Distributed under the terms of the MIT License.
*/
#include "DirectoryIterator.h"
#include <stdlib.h>
#include "Inode.h"
#define TRACE_UFS2
#ifdef TRACE_UFS2
# define TRACE(x...) dprintf("\33[34mufs2:\33[0m " x)
#else
# define TRACE(x...) ;
#endif
#define ERROR(x...) dprintf("\33[34mufs2:\33[0m " x)
DirectoryIterator::DirectoryIterator(Inode* inode)
:
fInode(inode)
{
fOffset = 0;
}
DirectoryIterator::~DirectoryIterator()
{
}
status_t
DirectoryIterator::InitCheck()
{
return B_OK;
}
status_t
DirectoryIterator::Lookup(const char* name, size_t length, ino_t* _id)
{
if (strcmp(name, ".") == 0) {
*_id = fInode->ID();
return B_OK;
}
char getname[B_FILE_NAME_LENGTH];
status_t status;
while(true) {
status = GetNext(getname, &length, _id);
if (status != B_OK)
return status;
if (strcmp(getname, name) == 0)
return B_OK;
}
}
status_t
DirectoryIterator::GetNext(char* name, size_t* _nameLength, ino_t* _id)
{
dir direct;
size_t size = sizeof(dir);
status_t status = fInode->ReadAt(fOffset, (uint8_t*)&direct, &size);
if (status == B_OK) {
int remainder = direct.namlen % 4;
if(remainder != 0) {
remainder = 4 - remainder;
remainder = direct.namlen + remainder;
} else {
remainder = direct.namlen + 4;
}
fOffset = fOffset + 8 + remainder;
if (direct.next_ino > 0) {
if ((direct.namlen + 1) > *_nameLength)
return B_BUFFER_OVERFLOW;
strlcpy(name, direct.name, direct.namlen + 1);
*_id = direct.next_ino;
*_nameLength = direct.namlen;
return B_OK;
}
return B_ENTRY_NOT_FOUND;
}
return B_ERROR;
}
