65 lines
1.3 KiB
C++
65 lines
1.3 KiB
C++
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#include "fs/ramfs/RamFSInode.h"
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#include "fs/ramfs/RamFSFile.h"
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#include "fs/ramfs/RamFSSuperblock.h"
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#include "fs/Dentry.h"
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#define ERROR_FRO "ERROR: The flag muss be READONLY for several opened files"
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#define ERROR_FF "ERROR: The flag does not allow this operation"
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#define ERROR_FNO "ERROR: The file is not open."
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RamFSFile::RamFSFile(Inode* inode, Dentry* dentry, uint32 flag) :
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File(inode, dentry, flag)
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{
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f_superblock_ = inode->getSuperblock();
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offset_ = 0;
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}
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RamFSFile::~RamFSFile()
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{
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}
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int32 RamFSFile::read(char *buffer, size_t count, l_off_t offset)
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{
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if (((flag_ & O_RDONLY) || (flag_ & O_RDWR)) && (f_inode_->getMode() & A_READABLE))
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{
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int32 read_bytes = f_inode_->readData(offset_ + offset, count, buffer);
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offset_ += read_bytes;
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return read_bytes;
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}
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else
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{
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// ERROR_FF
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return -1;
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}
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}
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int32 RamFSFile::write(const char *buffer, size_t count, l_off_t offset)
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{
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if (((flag_ & O_WRONLY) || (flag_ & O_RDWR)) && (f_inode_->getMode() & A_WRITABLE))
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{
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int32 written_bytes = f_inode_->writeData(offset_ + offset, count, buffer);
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offset_ += written_bytes;
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return written_bytes;
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}
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else
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{
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// ERROR_FF
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return -1;
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}
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}
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int32 RamFSFile::open(uint32 __attribute__((unused)) flag)
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{
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return 0;
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}
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int32 RamFSFile::close()
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{
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return 0;
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}
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int32 RamFSFile::flush()
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{
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return 0;
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}
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