1 /* Licensed to the Apache Software Foundation (ASF) under one or more
2 * contributor license agreements. See the NOTICE file distributed with
3 * this work for additional information regarding copyright ownership.
4 * The ASF licenses this file to You under the Apache License, Version 2.0
5 * (the "License"); you may not use this file except in compliance with
6 * the License. You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #include "apr_arch_file_io.h"
18 #include "apr_file_io.h"
24 static apr_status_t setptr(apr_file_t *thefile, unsigned long pos )
29 if (thefile->direction == 1) {
30 apr_status_t rv = apr_file_flush(thefile);
32 if (rv != APR_SUCCESS) {
36 thefile->bufpos = thefile->direction = thefile->dataRead = 0;
39 newbufpos = pos - (thefile->filePtr - thefile->dataRead);
40 if (newbufpos >= 0 && newbufpos <= thefile->dataRead) {
41 thefile->bufpos = newbufpos;
44 rc = DosSetFilePtr(thefile->filedes, pos, FILE_BEGIN, &thefile->filePtr );
47 thefile->bufpos = thefile->dataRead = 0;
50 return APR_FROM_OS_ERROR(rc);
55 APR_DECLARE(apr_status_t) apr_file_seek(apr_file_t *thefile, apr_seek_where_t where, apr_off_t *offset)
57 if (!thefile->isopen) {
63 if (thefile->buffered) {
69 rc = setptr(thefile, *offset);
73 rc = setptr(thefile, thefile->filePtr - thefile->dataRead + thefile->bufpos + *offset);
77 rc = apr_file_info_get(&finfo, APR_FINFO_NORM, thefile);
78 if (rc == APR_SUCCESS)
79 rc = setptr(thefile, finfo.size + *offset);
83 *offset = thefile->filePtr - thefile->dataRead + thefile->bufpos;
100 return APR_FROM_OS_ERROR(DosSetFilePtr(thefile->filedes, *offset, where, (ULONG *)offset));
106 APR_DECLARE(apr_status_t) apr_file_trunc(apr_file_t *fp, apr_off_t offset)
108 int rc = DosSetFileSize(fp->filedes, offset);
111 return APR_FROM_OS_ERROR(rc);
115 return setptr(fp, offset);