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105 lines
2.5 KiB
C++
105 lines
2.5 KiB
C++
/*******************************************************************************
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COPYRIGHT(C) JONAS 'SORTIE' TERMANSEN 2012.
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This file is part of Sortix.
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Sortix is free software: you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation, either version 3 of the License, or (at your option) any later
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version.
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Sortix is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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details.
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You should have received a copy of the GNU General Public License along with
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Sortix. If not, see <http://www.gnu.org/licenses/>.
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fs/util.h
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Utility classes for kernel filesystems.
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*******************************************************************************/
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#ifndef SORTIX_FS_UTIL_H
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#define SORTIX_FS_UTIL_H
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#include "../stream.h"
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namespace Sortix {
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class DevStringBuffer : public DevBuffer
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{
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public:
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DevStringBuffer(char* str);
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virtual ~DevStringBuffer();
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private:
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char* str;
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size_t strlength;
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size_t off;
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public:
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virtual size_t BlockSize();
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virtual uintmax_t Size();
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virtual uintmax_t Position();
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virtual bool Seek(uintmax_t position);
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virtual bool Resize(uintmax_t size);
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virtual ssize_t Read(byte* dest, size_t count);
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virtual ssize_t Write(const byte* src, size_t count);
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virtual bool IsReadable();
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virtual bool IsWritable();
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};
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class DevLineCommand : public DevStream
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{
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public:
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DevLineCommand(bool (*handler)(void*, const char*), void* user);
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virtual ~DevLineCommand();
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virtual ssize_t Read(byte* dest, size_t count);
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virtual ssize_t Write(const byte* src, size_t count);
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virtual bool IsReadable();
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virtual bool IsWritable();
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private:
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bool (*handler)(void*, const char*);
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void* user;
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size_t sofar;
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static const size_t CMDMAX = 255;
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char cmd[CMDMAX+1];
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bool handled;
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};
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class DevMemoryBuffer : public DevBuffer
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{
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public:
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DevMemoryBuffer(uint8_t* buf, size_t bufsize, bool write = true,
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bool deletebuf = true);
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~DevMemoryBuffer();
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private:
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uint8_t* buf;
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size_t bufsize;
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size_t off;
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bool write;
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bool deletebuf;
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public:
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virtual size_t BlockSize();
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virtual uintmax_t Size();
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virtual uintmax_t Position();
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virtual bool Seek(uintmax_t position);
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virtual bool Resize(uintmax_t size);
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virtual ssize_t Read(byte* dest, size_t count);
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virtual ssize_t Write(const byte* src, size_t count);
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virtual bool IsReadable();
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virtual bool IsWritable();
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};
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} // namespace Sortix
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#endif
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