versions/v1_4_0/mynewt-core/fs/fs/src/fsutil.c

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

#include "fs/fs.h"

int
fsutil_read_file(const char *path, uint32_t offset, uint32_t len, void *dst,
                 uint32_t *out_len)
{
    struct fs_file *file;
    int rc;

    rc = fs_open(path, FS_ACCESS_READ, &file);
    if (rc != 0) {
        return rc;
    }

    rc = fs_read(file, len, dst, out_len);
    if (rc != 0) {
        goto done;
    }

    rc = 0;

done:
    fs_close(file);
    return rc;
}

int
fsutil_write_file(const char *path, const void *data, uint32_t len)
{
    struct fs_file *file;
    int rc;

    rc = fs_open(path, FS_ACCESS_WRITE | FS_ACCESS_TRUNCATE, &file);
    if (rc != 0) {
        return rc;
    }

    rc = fs_write(file, data, len);
    if (rc != 0) {
        goto done;
    }

    rc = 0;

done:
    fs_close(file);
    return rc;
}