1 files changed, 111 insertions, 0 deletions
diff --git a/file_io/unix/fullrw.c b/file_io/unix/fullrw.c
new file mode 100644
index 0000000..3c67f65
--- /dev/null
+++ b/file_io/unix/fullrw.c
@@ -0,0 +1,111 @@
+/* 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;
+}