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/* 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 "apr_arch_file_io.h"
#include "apr_file_io.h"
#include "apr_lib.h"
#include <string.h>
#include <io.h>
static apr_status_t setptr(apr_file_t *thefile, unsigned long pos )
{
long newbufpos;
ULONG rc;
if (thefile->direction == 1) {
/* XXX: flush here is not mutex protected */
apr_status_t rv = apr_file_flush(thefile);
if (rv != APR_SUCCESS) {
return rv;
}
thefile->bufpos = thefile->direction = thefile->dataRead = 0;
}
newbufpos = pos - (thefile->filePtr - thefile->dataRead);
if (newbufpos >= 0 && newbufpos <= thefile->dataRead) {
thefile->bufpos = newbufpos;
rc = 0;
} else {
rc = DosSetFilePtr(thefile->filedes, pos, FILE_BEGIN, &thefile->filePtr );
if ( !rc )
thefile->bufpos = thefile->dataRead = 0;
}
return APR_FROM_OS_ERROR(rc);
}
APR_DECLARE(apr_status_t) apr_file_seek(apr_file_t *thefile, apr_seek_where_t where, apr_off_t *offset)
{
if (!thefile->isopen) {
return APR_EBADF;
}
thefile->eof_hit = 0;
if (thefile->buffered) {
int rc = EINVAL;
apr_finfo_t finfo;
switch (where) {
case APR_SET:
rc = setptr(thefile, *offset);
break;
case APR_CUR:
rc = setptr(thefile, thefile->filePtr - thefile->dataRead + thefile->bufpos + *offset);
break;
case APR_END:
rc = apr_file_info_get(&finfo, APR_FINFO_NORM, thefile);
if (rc == APR_SUCCESS)
rc = setptr(thefile, finfo.size + *offset);
break;
}
*offset = thefile->filePtr - thefile->dataRead + thefile->bufpos;
return rc;
} else {
switch (where) {
case APR_SET:
where = FILE_BEGIN;
break;
case APR_CUR:
where = FILE_CURRENT;
break;
case APR_END:
where = FILE_END;
break;
}
return APR_FROM_OS_ERROR(DosSetFilePtr(thefile->filedes, *offset, where, (ULONG *)offset));
}
}
APR_DECLARE(apr_status_t) apr_file_trunc(apr_file_t *fp, apr_off_t offset)
{
int rc = DosSetFileSize(fp->filedes, offset);
if (rc != 0) {
return APR_FROM_OS_ERROR(rc);
}
if (fp->buffered) {
return setptr(fp, offset);
}
return APR_SUCCESS;
}
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