Make PPAPI headers compile with C compilers (gcc on Linux & Mac and MSVS on W...

ppapi/c/dev/deprecated_bool.h

+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PPAPI_C_DEV_DEPRECATED_BOOL_H_
+#define PPAPI_C_DEV_DEPRECATED_BOOL_H_
+
+/**
+ * @file
+ * Defines the API ...
+ *
+ * @addtogroup PP
+ * @{
+ */
+// TODO(ppapi authors):  Remove ppp_class_deprecated.h and ppb_var_deprecated.h
+// and remove this file.  This is only here to ease the transition from
+// deprecated interfaces to the new ones.  Add a usable definition of bool for
+// C code.
+#if !defined(__cplusplus)
+# if defined(_MSC_VER) || !defined(__STDC_VERSION__) || \
+    (__STDC_VERSION__ < 199901L)
+// The Visual Studio C compiler and older versions of GCC do not support C99
+// and thus have no bool or stdbool.h.  Make a simple definition of bool,
+// true, and false to make this deprecated interface compile in C.  Force it
+// to 1 byte to have some chance of ABI compatibility between C and C++, in
+// case we don't remove this.
+typedef char bool;
+#  define false 0
+#  define true 1
+# else
+// In C99-compliant compilers, we can include stdbool.h to get a bool
+// definition.
+#  include <stdbool.h>
+# endif
+#endif
+
+/**
+ * @}
+ * End addtogroup PP
+ */
+
+#endif  // PPAPI_C_DEV_DEPRECATED_BOOL_H_
+