5cfbfb5a32
git-svn-id: http://svn.lfbs.rwth-aachen.de/svn/scc/trunk/MetalSVM@102 315a16e6-25f9-4109-90ae-ca3045a26c18
72 lines
2 KiB
C
72 lines
2 KiB
C
/*
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* Copyright 2010 Stefan Lankes, Chair for Operating Systems,
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* RWTH Aachen University
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* This file is part of MetalSVM.
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*/
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#include <metalsvm/fs.h>
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fs_node_t *fs_root = NULL; // The root of the filesystem.
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uint32_t read_fs(fs_node_t * node, uint32_t offset, uint32_t size, uint8_t * buffer)
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{
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// Has the node got a read callback?
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if (node->read != 0)
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return node->read(node, offset, size, buffer);
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else
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return 0;
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}
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uint32_t write_fs(fs_node_t * node, uint32_t offset, uint32_t size, uint8_t * buffer)
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{
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// Has the node got a write callback?
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if (node->write != 0)
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return node->write(node, offset, size, buffer);
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else
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return 0;
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}
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void open_fs(fs_node_t * node, uint8_t read, uint8_t write)
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{
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// Has the node got an open callback?
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if (node->open != 0)
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return node->open(node);
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}
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void close_fs(fs_node_t * node)
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{
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// Has the node got a close callback?
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if (node->close != 0)
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return node->close(node);
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}
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struct dirent *readdir_fs(fs_node_t * node, uint32_t index)
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{
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// Is the node a directory, and does it have a callback?
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if ((node->flags & 0x7) == FS_DIRECTORY && node->readdir != 0)
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return node->readdir(node, index);
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else
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return NULL;
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}
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fs_node_t *finddir_fs(fs_node_t * node, char *name)
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{
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// Is the node a directory, and does it have a callback?
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if ((node->flags & 0x7) == FS_DIRECTORY && node->finddir != 0)
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return node->finddir(node, name);
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else
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return NULL;
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}
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