Fennix/Kernel
1
0
Fork 0
mirror of https://github.com/Fennix-Project/Kernel.git synced 2025-07-05 20:39:19 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Implement file seek

Browse Source
This commit is contained in:
Alex
2023-05-05 19:19:05 +03:00
parent b0e0415b3e
commit 50a0857524
5 changed files with 92 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

35
Core/Memory/MemoryManager.cpp
View File

@ -46,10 +46,45 @@ namespace Memory
return Size;
}
SeekFSFunction(MEM_Seek)
{
long NewOffset;
if (Whence == SEEK_SET)
{
if (Offset > node->Length)
return -1;
node->Offset = Offset;
NewOffset = node->Offset;
}
else if (Whence == SEEK_CUR)
{
NewOffset = node->Offset + Offset;
if (NewOffset > node->Length || NewOffset < 0)
return -1;
node->Offset = NewOffset;
}
else if (Whence == SEEK_END)
{
NewOffset = node->Length + Offset;
if (NewOffset < 0)
return -1;
node->Offset = NewOffset;
}
else
{
error("Invalid whence!");
return -1;
}
return NewOffset;
}
VirtualFileSystem::FileSystemOperations mem_op = {
.Name = "mem",
.Read = MEM_Read,
.Write = MEM_Write,
.Seek = MEM_Seek,
};
uint64_t MemMgr::GetAllocatedMemorySize()