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-rw-r--r--file_io/unix/fullrw.c111
1 files changed, 111 insertions, 0 deletions
diff --git a/file_io/unix/fullrw.c b/file_io/unix/fullrw.c
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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_file_io.h"
+
+
+APR_DECLARE(apr_status_t) apr_file_read_full(apr_file_t *thefile, void *buf,
+ apr_size_t nbytes,
+ apr_size_t *bytes_read)
+{
+ apr_status_t status;
+ apr_size_t total_read = 0;
+
+ do {
+ apr_size_t amt = nbytes;
+
+ status = apr_file_read(thefile, buf, &amt);
+ buf = (char *)buf + amt;
+ nbytes -= amt;
+ total_read += amt;
+ } while (status == APR_SUCCESS && nbytes > 0);
+
+ if (bytes_read != NULL)
+ *bytes_read = total_read;
+
+ return status;
+}
+
+APR_DECLARE(apr_status_t) apr_file_write_full(apr_file_t *thefile,
+ const void *buf,
+ apr_size_t nbytes,
+ apr_size_t *bytes_written)
+{
+ apr_status_t status;
+ apr_size_t total_written = 0;
+
+ do {
+ apr_size_t amt = nbytes;
+
+ status = apr_file_write(thefile, buf, &amt);
+ buf = (char *)buf + amt;
+ nbytes -= amt;
+ total_written += amt;
+ } while (status == APR_SUCCESS && nbytes > 0);
+
+ if (bytes_written != NULL)
+ *bytes_written = total_written;
+
+ return status;
+}
+
+APR_DECLARE(apr_status_t) apr_file_writev_full(apr_file_t *thefile,
+ const struct iovec *vec,
+ apr_size_t nvec,
+ apr_size_t *bytes_written)
+{
+ apr_status_t rv = APR_SUCCESS;
+ apr_size_t i;
+ apr_size_t amt = 0;
+ apr_size_t total = 0;
+
+ for (i = 0; i < nvec; i++) {
+ total += vec[i].iov_len;
+ }
+
+ rv = apr_file_writev(thefile, vec, nvec, &amt);
+
+ if (bytes_written != NULL)
+ *bytes_written = amt;
+
+ if (rv != APR_SUCCESS || (amt == total)) {
+ return rv;
+ }
+
+ for (i = 0; i < nvec && amt; i++) {
+ if (amt >= vec[i].iov_len) {
+ amt -= vec[i].iov_len;
+ }
+ else {
+ break;
+ }
+ }
+
+ if (amt) {
+ rv = apr_file_write_full(thefile, (const char *)vec[i].iov_base + amt,
+ vec[i].iov_len - amt, NULL);
+ }
+
+ for (; i < nvec && rv == APR_SUCCESS; i++) {
+ rv = apr_file_write_full(thefile, vec[i].iov_base,
+ vec[i].iov_len, &amt);
+ }
+
+ if (bytes_written != NULL)
+ *bytes_written = total;
+
+ return rv;
+}