mirror of
https://github.com/markqvist/OpenModem.git
synced 2025-11-03 15:17:40 -05:00
82 lines
2.4 KiB
C
82 lines
2.4 KiB
C
/**
|
|
* \file
|
|
* <!--
|
|
* This file is part of BeRTOS.
|
|
*
|
|
* Bertos is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*
|
|
* As a special exception, you may use this file as part of a free software
|
|
* library without restriction. Specifically, if other files instantiate
|
|
* templates or use macros or inline functions from this file, or you compile
|
|
* this file and link it with other files to produce an executable, this
|
|
* file does not by itself cause the resulting executable to be covered by
|
|
* the GNU General Public License. This exception does not however
|
|
* invalidate any other reasons why the executable file might be covered by
|
|
* the GNU General Public License.
|
|
*
|
|
* Copyright 2009 Develer S.r.l. (http://www.develer.com/)
|
|
*
|
|
* -->
|
|
*
|
|
* \brief KFile interface over a memory buffer.
|
|
*
|
|
* \author Francesco Sacchi <batt@develer.com>
|
|
*/
|
|
|
|
#include "kfile_mem.h"
|
|
|
|
#include <io/kfile.h>
|
|
|
|
#include <string.h>
|
|
|
|
static size_t kfilemem_read(struct KFile *_fd, void *buf, size_t size)
|
|
{
|
|
KFileMem *fd = KFILEMEM_CAST(_fd);
|
|
|
|
size = MIN((kfile_off_t)size, fd->fd.size - fd->fd.seek_pos);
|
|
uint8_t *mem = (uint8_t *)fd->mem;
|
|
memcpy(buf, mem + fd->fd.seek_pos, size);
|
|
fd->fd.seek_pos += size;
|
|
|
|
return size;
|
|
}
|
|
|
|
static size_t kfilemem_write(struct KFile *_fd, const void *buf, size_t size)
|
|
{
|
|
KFileMem *fd = KFILEMEM_CAST(_fd);
|
|
|
|
size = MIN((kfile_off_t)size, fd->fd.size - fd->fd.seek_pos);
|
|
uint8_t *mem = (uint8_t *)fd->mem;
|
|
memcpy(mem + fd->fd.seek_pos, buf, size);
|
|
fd->fd.seek_pos += size;
|
|
|
|
return size;
|
|
}
|
|
|
|
void kfilemem_init(KFileMem *km, void *mem, size_t len)
|
|
{
|
|
ASSERT(km);
|
|
ASSERT(mem);
|
|
ASSERT(len);
|
|
|
|
memset(km, 0, sizeof(*km));
|
|
|
|
km->mem = mem;
|
|
kfile_init(&km->fd);
|
|
km->fd.read = kfilemem_read;
|
|
km->fd.write = kfilemem_write;
|
|
km->fd.size = len;
|
|
DB(km->fd._type = KFT_KFILEMEM);
|
|
}
|