1 files changed, 76 insertions, 0 deletions
diff --git a/liblog/uio.c b/liblog/uio.c
new file mode 100644
index 0000000..cfa4cb1
--- /dev/null
+++ b/liblog/uio.c
@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2007 The Android Open Source Project
+ *
+ * Licensed 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.
+ */
+
+#ifndef HAVE_SYS_UIO_H
+
+#include <log/uio.h>
+#include <unistd.h>
+
+int  readv( int  fd, struct iovec*  vecs, int  count )
+{
+    int   total = 0;
+
+    for ( ; count > 0; count--, vecs++ ) {
+        const char*  buf = vecs->iov_base;
+        int          len = vecs->iov_len;
+        
+        while (len > 0) {
+            int  ret = read( fd, buf, len );
+            if (ret < 0) {
+                if (total == 0)
+                    total = -1;
+                goto Exit;
+            }
+            if (ret == 0)
+                goto Exit;
+
+            total += ret;
+            buf   += ret;
+            len   -= ret;
+        }
+    }
+Exit:
+    return total;
+}
+
+int  writev( int  fd, const struct iovec*  vecs, int  count )
+{
+    int   total = 0;
+
+    for ( ; count > 0; count--, vecs++ ) {
+        const char*  buf = (const char*)vecs->iov_base;
+        int          len = (int)vecs->iov_len;
+        
+        while (len > 0) {
+            int  ret = write( fd, buf, len );
+            if (ret < 0) {
+                if (total == 0)
+                    total = -1;
+                goto Exit;
+            }
+            if (ret == 0)
+                goto Exit;
+
+            total += ret;
+            buf   += ret;
+            len   -= ret;
+        }
+    }
+Exit:    
+    return total;
+}
+
+#endif /* !HAVE_SYS_UIO_H */