113 lines
3.2 KiB
C
113 lines
3.2 KiB
C
/**
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* \file
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* <!--
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* This file is part of BeRTOS.
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*
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* Bertos is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* As a special exception, you may use this file as part of a free software
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* library without restriction. Specifically, if other files instantiate
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* templates or use macros or inline functions from this file, or you compile
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* this file and link it with other files to produce an executable, this
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* file does not by itself cause the resulting executable to be covered by
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* the GNU General Public License. This exception does not however
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* invalidate any other reasons why the executable file might be covered by
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* the GNU General Public License.
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*
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* Copyright 2009 Develer S.r.l. (http://www.develer.com/)
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*
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* -->
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*
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* \brief KFile interface implementation in Posix systems.
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*
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* \author Luca Ottaviano <lottaviano@develer.com>
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*/
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#include <emul/kfile_posix.h>
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#include <string.h>
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static size_t kfile_posix_read(struct KFile *_fd, void *buf, size_t size)
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{
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KFilePosix *fd = KFILEPOSIX_CAST(_fd);
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size_t len = fread(buf, sizeof(uint8_t), size, fd->fp);
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fd->fd.seek_pos += len;
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return len;
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}
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static size_t kfile_posix_write(struct KFile *_fd, const void *buf, size_t size)
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{
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KFilePosix *fd = KFILEPOSIX_CAST(_fd);
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size_t len = fwrite(buf, sizeof(uint8_t), size, fd->fp);
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fd->fd.seek_pos += len;
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fd->fd.size = MAX(fd->fd.size, fd->fd.seek_pos);
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return len;
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}
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static kfile_off_t kfile_posix_seek(struct KFile *_fd, kfile_off_t offset, KSeekMode whence)
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{
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KFilePosix *fd = KFILEPOSIX_CAST(_fd);
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int std_whence;
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switch (whence)
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{
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case KSM_SEEK_CUR:
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std_whence = SEEK_CUR;
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break;
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case KSM_SEEK_END:
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std_whence = SEEK_END;
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break;
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case KSM_SEEK_SET:
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std_whence = SEEK_SET;
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break;
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default:
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ASSERT(0);
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return EOF;
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}
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int err = fseek(fd->fp, offset, std_whence);
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if (err)
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return err;
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fd->fd.seek_pos = ftell(fd->fp);
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return fd->fd.seek_pos;
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}
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static int kfile_posix_close(struct KFile *_fd)
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{
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KFilePosix *fd = KFILEPOSIX_CAST(_fd);
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return fclose(fd->fp);
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}
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static int kfile_posix_flush(struct KFile *_fd)
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{
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KFilePosix *fd = KFILEPOSIX_CAST(_fd);
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return fflush(fd->fp);
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}
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FILE *kfile_posix_init(KFilePosix *file, const char *filename, const char *mode)
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{
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memset(file, 0, sizeof(*file));
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DB(file->fd._type = KFT_KFILEPOSIX);
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file->fd.read = kfile_posix_read;
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file->fd.write = kfile_posix_write;
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file->fd.close = kfile_posix_close;
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file->fd.seek = kfile_posix_seek;
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file->fd.flush = kfile_posix_flush;
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file->fp = fopen(filename, mode);
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fseek(file->fp, 0, SEEK_END);
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file->fd.size = ftell(file->fp);
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fseek(file->fp, 0, SEEK_SET);
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return file->fp;
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}
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