1 files changed, 73 insertions, 0 deletions
diff --git a/src/streambuf.cpp b/src/streambuf.cpp
new file mode 100644
index 0000000..0acebb3
--- /dev/null
+++ b/src/streambuf.cpp
@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <streambuf>
+#include <algorithm>  // for min
+namespace std {
+
+// Implementation of the streambuf, common stuff for all the stream buffers.
+streambuf::streambuf()
+    : mPutBeg(0), mPutCurr(0), mPutEnd(0) { }
+
+streambuf::streambuf(const streambuf& sb)
+    : mPutBeg(sb.mPutBeg), mPutCurr(sb.mPutCurr), mPutEnd(sb.mPutEnd) { }
+
+streambuf::~streambuf() {}
+
+streamsize streambuf::xsputn(const char_type* str, streamsize num) {
+    streamsize written = 0;
+
+    while (written < num) {
+        const streamsize avail = this->epptr() - this->pptr();
+        if (avail) {
+            const streamsize remaining = num - written;
+            const streamsize len = std::min(avail, remaining);
+            traits_type::copy(this->pptr(), str, len);
+            written += len;
+            str += len;
+            this->pbump(len);
+        }
+
+        if (written < num) {
+            // Indicate to the impl that we overflown. Either the impl
+            // can increase its buffer and consume one character (in
+            // which case eof() is not returned) or it can't and we
+            // stop here.
+            int_type c = this->overflow(traits_type::to_int_type(*str));
+            if (!traits_type::eq_int_type(c, traits_type::eof())) {
+                ++written;
+                ++str;
+            } else {
+                break;
+            }
+        }
+    }
+    return written;
+}
+
+}  // namespace std