Split nextpnr.h to allow for linear inclusion.

"nextpnr.h" is no longer the god header.  Important improvements:

 - Functions in log.h can be used without including
   BaseCtx/Arch/Context. This means that log_X functions can be called
   without included "nextpnr.h"

 - NPNR_ASSERT can be used without including "nextpnr.h" by including
   "nextpnr_assertions.h".  This allows NPNR_ASSERT to be used safely in
   any header file.

 - Types defined in "archdefs.h" are now available without including
   BaseCtx/Arch/Context.  This means that utility classes that will be
   used inside of BaseCtx/Arch/Context can be defined safely in a
   self-contained header.

Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>

1 files changed, 53 insertions, 0 deletions

diff --git a/common/nextpnr_namespaces.h b/common/nextpnr_namespaces.h
new file mode 100644
index 00000000..8242376c
--- /dev/null
+++ b/common/nextpnr_namespaces.h
@@ -0,0 +1,53 @@
+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2018  Clifford Wolf <clifford@symbioticeda.com>
+ *  Copyright (C) 2018  Serge Bazanski <q3k@symbioticeda.com>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#ifndef NEXTPNR_NAMESPACES_H
+#define NEXTPNR_NAMESPACES_H
+
+#ifdef NEXTPNR_NAMESPACE
+#define NEXTPNR_NAMESPACE_PREFIX NEXTPNR_NAMESPACE::
+#define NEXTPNR_NAMESPACE_BEGIN namespace NEXTPNR_NAMESPACE {
+#define NEXTPNR_NAMESPACE_END }
+#define USING_NEXTPNR_NAMESPACE using namespace NEXTPNR_NAMESPACE;
+#else
+#define NEXTPNR_NAMESPACE_PREFIX
+#define NEXTPNR_NAMESPACE_BEGIN
+#define NEXTPNR_NAMESPACE_END
+#define USING_NEXTPNR_NAMESPACE
+#endif
+
+#if defined(__GNUC__) || defined(__clang__)
+#define NPNR_ATTRIBUTE(...) __attribute__((__VA_ARGS__))
+#define NPNR_NORETURN __attribute__((noreturn))
+#define NPNR_DEPRECATED __attribute__((deprecated))
+#define NPNR_PACKED_STRUCT(...) __VA_ARGS__ __attribute__((packed))
+#elif defined(_MSC_VER)
+#define NPNR_ATTRIBUTE(...)
+#define NPNR_NORETURN __declspec(noreturn)
+#define NPNR_DEPRECATED __declspec(deprecated)
+#define NPNR_PACKED_STRUCT(...) __pragma(pack(push, 1)) __VA_ARGS__ __pragma(pack(pop))
+#else
+#define NPNR_ATTRIBUTE(...)
+#define NPNR_NORETURN
+#define NPNR_DEPRECATED
+#define NPNR_PACKED_STRUCT(...) __VA_ARGS__
+#endif
+
+#endif /* NEXTPNR_NAMESPACES_H */