Working

bertos/emul/kfile_posix.c

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+/**
+ * \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 implementation in Posix systems.
+ *
+ * \author Luca Ottaviano <lottaviano@develer.com>
+ */
+
+#include <emul/kfile_posix.h>
+#include <string.h>
+
+static size_t kfile_posix_read(struct KFile *_fd, void *buf, size_t size)
+{
+	KFilePosix *fd = KFILEPOSIX_CAST(_fd);
+	size_t len = fread(buf, sizeof(uint8_t), size, fd->fp);
+	fd->fd.seek_pos += len;
+	return len;
+}
+
+static size_t kfile_posix_write(struct KFile *_fd, const void *buf, size_t size)
+{
+	KFilePosix *fd = KFILEPOSIX_CAST(_fd);
+	size_t len = fwrite(buf, sizeof(uint8_t), size, fd->fp);
+	fd->fd.seek_pos += len;
+	fd->fd.size = MAX(fd->fd.size, fd->fd.seek_pos);
+	return len;
+}
+
+static kfile_off_t kfile_posix_seek(struct KFile *_fd, kfile_off_t offset, KSeekMode whence)
+{
+	KFilePosix *fd = KFILEPOSIX_CAST(_fd);
+	int std_whence;
+	switch (whence)
+	{
+		case KSM_SEEK_CUR:
+			std_whence = SEEK_CUR;
+			break;
+		case KSM_SEEK_END:
+			std_whence = SEEK_END;
+			break;
+		case KSM_SEEK_SET:
+			std_whence = SEEK_SET;
+			break;
+		default:
+			ASSERT(0);
+			return EOF;
+	}
+	int err = fseek(fd->fp, offset, std_whence);
+	if (err)
+		return err;
+
+	fd->fd.seek_pos = ftell(fd->fp);
+	return fd->fd.seek_pos;
+}
+
+static int kfile_posix_close(struct KFile *_fd)
+{
+	KFilePosix *fd = KFILEPOSIX_CAST(_fd);
+	return fclose(fd->fp);
+}
+
+static int kfile_posix_flush(struct KFile *_fd)
+{
+	KFilePosix *fd = KFILEPOSIX_CAST(_fd);
+	return fflush(fd->fp);
+}
+
+FILE *kfile_posix_init(KFilePosix *file, const char *filename, const char *mode)
+{
+	memset(file, 0, sizeof(*file));
+	DB(file->fd._type = KFT_KFILEPOSIX);
+	file->fd.read = kfile_posix_read;
+	file->fd.write = kfile_posix_write;
+	file->fd.close = kfile_posix_close;
+	file->fd.seek = kfile_posix_seek;
+	file->fd.flush = kfile_posix_flush;
+
+	file->fp = fopen(filename, mode);
+	fseek(file->fp, 0, SEEK_END);
+	file->fd.size = ftell(file->fp);
+	fseek(file->fp, 0, SEEK_SET);
+	return file->fp;
+}