forked from Mirrors/freeswitch
0488a5109a
git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@3733 d0543943-73ff-0310-b7d9-9358b9ac24b2
101 lines
2.8 KiB
C
101 lines
2.8 KiB
C
/* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "apr_arch_file_io.h"
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static apr_status_t setptr(apr_file_t *thefile, apr_off_t pos )
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{
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apr_off_t newbufpos;
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apr_status_t rv;
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if (thefile->direction == 1) {
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rv = apr_file_flush(thefile);
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if (rv) {
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return rv;
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}
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thefile->bufpos = thefile->direction = thefile->dataRead = 0;
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}
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newbufpos = pos - (thefile->filePtr - thefile->dataRead);
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if (newbufpos >= 0 && newbufpos <= thefile->dataRead) {
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thefile->bufpos = newbufpos;
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rv = APR_SUCCESS;
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}
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else {
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if (lseek(thefile->filedes, pos, SEEK_SET) != -1) {
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thefile->bufpos = thefile->dataRead = 0;
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thefile->filePtr = pos;
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rv = APR_SUCCESS;
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}
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else {
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rv = errno;
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}
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}
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return rv;
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}
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APR_DECLARE(apr_status_t) apr_file_seek(apr_file_t *thefile, apr_seek_where_t where, apr_off_t *offset)
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{
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apr_off_t rv;
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thefile->eof_hit = 0;
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if (thefile->buffered) {
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int rc = EINVAL;
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apr_finfo_t finfo;
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switch (where) {
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case APR_SET:
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rc = setptr(thefile, *offset);
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break;
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case APR_CUR:
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rc = setptr(thefile, thefile->filePtr - thefile->dataRead + thefile->bufpos + *offset);
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break;
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case APR_END:
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rc = apr_file_info_get(&finfo, APR_FINFO_SIZE, thefile);
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if (rc == APR_SUCCESS)
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rc = setptr(thefile, finfo.size + *offset);
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break;
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}
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*offset = thefile->filePtr - thefile->dataRead + thefile->bufpos;
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return rc;
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}
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else {
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rv = lseek(thefile->filedes, *offset, where);
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if (rv == -1) {
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*offset = -1;
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return errno;
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}
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else {
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*offset = rv;
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return APR_SUCCESS;
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}
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}
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}
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apr_status_t apr_file_trunc(apr_file_t *fp, apr_off_t offset)
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{
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if (ftruncate(fp->filedes, offset) == -1) {
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return errno;
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}
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return setptr(fp, offset);
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}
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