75 lines
1.7 KiB
C++
75 lines
1.7 KiB
C++
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#include "fs/ramfs/RamFSInode.h"
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#include "kstring.h"
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#include "assert.h"
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#include "fs/ramfs/RamFSSuperblock.h"
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#include "fs/ramfs/RamFSFile.h"
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#include "fs/Dentry.h"
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#include "FileSystemType.h"
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#include "console/kprintf.h"
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#define BASIC_ALLOC 256
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RamFSInode::RamFSInode(Superblock *super_block, uint32 inode_type) :
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Inode(super_block, inode_type),
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data_(0)
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{
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debug(RAMFS, "New RamFSInode %p\n", this);
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if (inode_type == I_FILE)
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{
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data_ = new char[BASIC_ALLOC]();
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i_size_ = BASIC_ALLOC;
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}
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}
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RamFSInode::~RamFSInode()
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{
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debug(RAMFS, "Destroying RamFSInode %p\n", this);
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delete[] data_;
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}
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int32 RamFSInode::readData(uint32 offset, uint32 size, char *buffer)
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{
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if(offset >= getSize())
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{
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return 0;
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}
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uint32 read_size = Min(size, getSize() - offset);
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char *ptr_offset = data_ + offset;
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memcpy(buffer, ptr_offset, read_size);
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return read_size;
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}
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int32 RamFSInode::writeData(uint32 offset, uint32 size, const char *buffer)
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{
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assert(i_type_ == I_FILE);
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if(offset >= getSize())
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{
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return 0;
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}
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uint32 write_size = Min(size, getSize() - offset);
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if(write_size != size)
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{
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debug(RAMFS, "WARNING: RamFS currently does not support expanding files via the write syscall\n");
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}
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char *ptr_offset = data_ + offset;
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memcpy(ptr_offset, buffer, write_size);
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return write_size;
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}
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File* RamFSInode::open(Dentry* dentry, uint32 flag)
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{
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debug(INODE, "%s Inode: Open file\n", getSuperblock()->getFSType()->getFSName());
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assert(ustl::find(i_dentrys_.begin(), i_dentrys_.end(), dentry) != i_dentrys_.end());
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File* file = (File*) (new RamFSFile(this, dentry, flag));
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i_files_.push_back(file);
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getSuperblock()->fileOpened(file);
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return file;
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}
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