moving things around

git-svn-id: svn://qnap.local/TwoTerm/trunk@1987 5590a31f-7b70-45f8-8c82-aa3a8e5f4507

cpp/OutputChannel.cpp

@@ -0,0 +1,75 @@
+/*
+ *  OutputChannel.cpp
+ *  2Term
+ *
+ *  Created by Kelvin Sherlock on 7/7/2010.
+ *  Copyright 2010 __MyCompanyName__. All rights reserved.
+ *
+ */
+
+#include "OutputChannel.h"
+
+#include <unistd.h>
+#include <fcntl.h>
+#include <cstring>
+#include <cerrno>
+
+bool OutputChannel::write(uint8_t c)
+{
+    return write(&c, 1);
+}
+
+bool OutputChannel::write(const char *str)
+{    
+    return write(str, std::strlen(str));
+}
+
+bool OutputChannel::write(const void *vp, size_t size)
+{
+    
+    if (!size) return true;
+    
+    for (unsigned i = 0; ;)
+    {
+        ssize_t s = ::write(_fd, vp, size);
+        
+        if (s < 0)
+        {
+            switch (errno)
+            {
+                case EAGAIN:
+                case EINTR:
+                    if (++i < 3) break;
+                default:
+                    _error = errno;
+                    // throw?
+                    return false;
+            }
+        
+        }
+
+        else if (size == s)
+        {
+            return true; 
+        }
+        
+        else if (s == 0)
+        {
+            if (++i == 3)
+            {
+                _error = EIO;
+                return false;
+            }
+        }        
+        else
+        {
+            size -= s;
+            vp = (uint8_t *)vp + s;
+            
+            if (size == 0) return true;
+        }
+
+    }
+    
+    return false;
+}