Bug 1028559 - Flatten xpcom/string/{public,src}/ directories. r=dbaron

xpcom/string/nsTSubstringTuple.cpp

@@ -0,0 +1,92 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+
+/**
+ * computes the aggregate string length
+ */
+
+nsTSubstringTuple_CharT::size_type
+nsTSubstringTuple_CharT::Length() const
+{
+  uint32_t len;
+  if (mHead) {
+    len = mHead->Length();
+  } else {
+    len = TO_SUBSTRING(mFragA).Length();
+  }
+
+  return len + TO_SUBSTRING(mFragB).Length();
+}
+
+
+/**
+ * writes the aggregate string to the given buffer. aBufLen is assumed
+ * to be equal to or greater than the value returned by the Length()
+ * method.  the string written to |aBuf| is not null-terminated.
+ */
+
+void
+nsTSubstringTuple_CharT::WriteTo(char_type* aBuf, uint32_t aBufLen) const
+{
+  const substring_type& b = TO_SUBSTRING(mFragB);
+
+  NS_ASSERTION(aBufLen >= b.Length(), "buffer too small");
+  uint32_t headLen = aBufLen - b.Length();
+  if (mHead) {
+    mHead->WriteTo(aBuf, headLen);
+  } else {
+    const substring_type& a = TO_SUBSTRING(mFragA);
+
+    NS_ASSERTION(a.Length() == headLen, "buffer incorrectly sized");
+    char_traits::copy(aBuf, a.Data(), a.Length());
+  }
+
+  char_traits::copy(aBuf + headLen, b.Data(), b.Length());
+
+#if 0
+  // we need to write out data into |aBuf|, ending at |aBuf + aBufLen|. So our
+  // data needs to precede |aBuf + aBufLen| exactly. We trust that the buffer
+  // was properly sized!
+
+  const substring_type& b = TO_SUBSTRING(mFragB);
+
+  NS_ASSERTION(aBufLen >= b.Length(), "buffer is too small");
+  char_traits::copy(aBuf + aBufLen - b.Length(), b.Data(), b.Length());
+
+  aBufLen -= b.Length();
+
+  if (mHead) {
+    mHead->WriteTo(aBuf, aBufLen);
+  } else {
+    const substring_type& a = TO_SUBSTRING(mFragA);
+    NS_ASSERTION(aBufLen == a.Length(), "buffer is too small");
+    char_traits::copy(aBuf, a.Data(), a.Length());
+  }
+#endif
+}
+
+
+/**
+ * returns true if this tuple is dependent on (i.e., overlapping with)
+ * the given char sequence.
+ */
+
+bool
+nsTSubstringTuple_CharT::IsDependentOn(const char_type* start, const char_type* end) const
+{
+  // we start with the right-most fragment since it is faster to check.
+
+  if (TO_SUBSTRING(mFragB).IsDependentOn(start, end)) {
+    return true;
+  }
+
+  if (mHead) {
+    return mHead->IsDependentOn(start, end);
+  }
+
+  return TO_SUBSTRING(mFragA).IsDependentOn(start, end);
+}