1 files changed, 120 insertions, 0 deletions
diff --git a/file_io/os2/seek.c b/file_io/os2/seek.c
new file mode 100644
index 0000000..a8d13fe
--- /dev/null
+++ b/file_io/os2/seek.c
@@ -0,0 +1,120 @@
+/* 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;
+}