4 * This file is part of BeRTOS.
6 * Bertos is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * As a special exception, you may use this file as part of a free software
21 * library without restriction. Specifically, if other files instantiate
22 * templates or use macros or inline functions from this file, or you compile
23 * this file and link it with other files to produce an executable, this
24 * file does not by itself cause the resulting executable to be covered by
25 * the GNU General Public License. This exception does not however
26 * invalidate any other reasons why the executable file might be covered by
27 * the GNU General Public License.
29 * Copyright 2010 Develer S.r.l. (http://www.develer.com/)
33 * \brief KFile interface over a KBlock.
37 #include "kfile_block.h"
42 * ID for KFile over a KBlock.
44 #define KFT_KFILEBLOCK MAKE_ID('K', 'F', 'B', 'L')
47 * Convert + ASSERT from generic KFile to KFileBlock.
49 INLINE KFileBlock * KFILEBLOCK_CAST(KFile *fd)
51 ASSERT(fd->_type == KFT_KFILEBLOCK);
52 return (KFileBlock *)fd;
55 #define KFILEBLOCK(dir, fd, buf, size) \
57 KFileBlock *fb = KFILEBLOCK_CAST(fd); \
58 block_idx_t id = (fd)->seek_pos / fb->b->blk_size; \
59 size_t offset = (fd)->seek_pos % fb->b->blk_size; \
60 size_t len = kblock_##dir(fb->b, id, buf, offset, size); \
61 (fd)->seek_pos += len; \
65 static size_t kfileblock_read(struct KFile *fd, void *buf, size_t size)
67 return KFILEBLOCK(read, fd, buf, size);
70 static size_t kfileblock_write(struct KFile *fd, const void *buf, size_t size)
72 return KFILEBLOCK(write, fd, buf, size);
75 static int kfileblock_flush(struct KFile *fd)
77 KFileBlock *fb = KFILEBLOCK_CAST(fd);
78 return kblock_flush(fb->b);
81 static int kfileblock_error(struct KFile *fd)
83 KFileBlock *fb = KFILEBLOCK_CAST(fd);
84 return kblock_error(fb->b);
87 static void kfileblock_clearerr(struct KFile *fd)
89 KFileBlock *fb = KFILEBLOCK_CAST(fd);
90 return kblock_clearerr(fb->b);
93 static int kfileblock_close(struct KFile *fd)
95 KFileBlock *fb = KFILEBLOCK_CAST(fd);
96 return kblock_close(fb->b);
99 void kfileblock_init(KFileBlock *fb, KBlock *b)
103 memset(fb, 0, sizeof(*fb));
105 DB(fb->fd._type = KFT_KFILEBLOCK);
107 fb->fd.size = b->blk_cnt * b->blk_size;
108 fb->fd.read = kfileblock_read;
109 fb->fd.write = kfileblock_write;
110 fb->fd.flush = kfileblock_flush;
111 fb->fd.error = kfileblock_error;
112 fb->fd.clearerr = kfileblock_clearerr;
113 fb->fd.close = kfileblock_close;