Fix Breakpad unit tests build for Android.

This patch contains the source-related fixes to ensure that
the Breakpad unit tests build properly when targetting Android.

Calling 'make check' still fails because there is still no
way to run the unit test programs on a device. This will be
addressed by a future patch.

Important notes:

- You must target Android API level 9 (Gingerbread) or higher
  to build the unit tests. This requirement is due to the
  current GTest revision used in the breakpad source tree.

- This patch adds headers providing inlined C library functions
  missing from the NDK (see src/common/android/testing). They
  are inlined to avoid modifying Makefile.am and other build
  files.

- Similarly, the <wchar.h> header-fix under
  src/common/android/testing/include is only required by
  GTest's current revision. E.g. it's not needed when building
  Breakpad as part of Chromium which uses a more up-to-date
  revision.
Review URL: https://breakpad.appspot.com/439002

git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1020 4c0a9323-5329-0410-9bdc-e9ce6186880e

1 files changed, 72 insertions, 0 deletions

diff --git a/src/common/android/testing/include/wchar.h b/src/common/android/testing/include/wchar.h
new file mode 100644
index 00000000..9649cab6
--- /dev/null
+++ b/src/common/android/testing/include/wchar.h
@@ -0,0 +1,72 @@
+// Copyright (c) 2012, Google Inc.
+// 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.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// 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.
+
+// Android doesn't provide wcscasecmp(), so provide an alternative here.
+//
+// Note that this header is not needed when Breakpad is compiled against
+// a recent version of Googletest. It shall be considered for removal once
+// src/testing/ is updated to an appropriate revision in the future.
+
+#ifndef GOOGLEBREAKPAD_COMMON_ANDROID_INCLUDE_WCHAR_H
+#define GOOGLEBREAKPAD_COMMON_ANDROID_INCLUDE_WCHAR_H
+
+#include_next <wchar.h>
+
+// This needs to be in an extern "C" namespace, or Googletest will not
+// compile against it.
+#ifdef __cplusplus
+extern "C" {
+#endif  // __cplusplus
+
+static wchar_t inline wcstolower(wchar_t ch) {
+  if (ch >= L'a' && ch <= L'A')
+    ch -= L'a' - L'A';
+  return ch;
+}
+
+static int inline wcscasecmp(const wchar_t* s1, const wchar_t* s2) {
+  for (;;) {
+    wchar_t c1 = wcstolower(*s1);
+    wchar_t c2 = wcstolower(*s2);
+    if (c1 < c2)
+      return -1;
+    if (c1 > c2)
+      return 1;
+    if (c1 == L'0')
+      return 0;
+    s1++;
+    s2++;
+  }
+}
+
+#ifdef __cplusplus
+}  // extern "C"
+#endif  // __cplusplus
+
+#endif  // GOOGLEBREAKPAD_COMMON_ANDROID_INCLUDE_WCHAR_H