2 files changed, 96 insertions, 0 deletions
diff --git a/common/embed.cc b/common/embed.cc
new file mode 100644
index 00000000..f8f439b5
--- /dev/null
+++ b/common/embed.cc
@@ -0,0 +1,46 @@
+#if defined(WIN32)
+#include <windows.h>
+#endif
+#include <boost/iostreams/device/mapped_file.hpp>
+#include <boost/filesystem.hpp>
+#include "nextpnr.h"
+#include "embed.h"
+
+NEXTPNR_NAMESPACE_BEGIN
+
+#if defined(EXTERNAL_CHIPDB_ROOT)
+
+const void *get_chipdb(const std::string &filename) {
+    static std::map<std::string, boost::iostreams::mapped_file> files;
+    if (!files.count(filename)) {
+        std::string full_filename = EXTERNAL_CHIPDB_ROOT "/" + filename;
+        if (boost::filesystem::exists(full_filename))
+            files[filename].open(full_filename, boost::iostreams::mapped_file::priv);
+    }
+    if (files.count(filename))
+        return files.at(filename).data();
+    return nullptr;
+}
+
+#elif defined(WIN32)
+
+const void *get_chipdb(const std::string &filename) {
+    HRSRC rc = ::FindResource(nullptr, filename.c_str(), RT_RCDATA);
+    HGLOBAL rcData = ::LoadResource(nullptr, rc);
+    return ::LockResource(rcData);
+}
+
+#else
+
+EmbeddedFile *EmbeddedFile::head = nullptr;
+
+const void *get_chipdb(const std::string &filename) {
+    for (EmbeddedFile *file = EmbeddedFile::head; file; file = file->next)
+        if (file->filename == filename)
+            return file->content;
+    return nullptr;
+}
+
+#endif
+
+NEXTPNR_NAMESPACE_END
diff --git a/common/embed.h b/common/embed.h
new file mode 100644
index 00000000..6111bf1f
--- /dev/null
+++ b/common/embed.h
@@ -0,0 +1,50 @@
+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2020  whitequark <whitequark@whitequark.org>
+ *
+ *  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 EMBED_H
+#define EMBED_H
+
+#include "nextpnr.h"
+NEXTPNR_NAMESPACE_BEGIN
+
+#if !defined(EXTERNAL_CHIPDB_ROOT) && !defined(WIN32)
+
+struct EmbeddedFile
+{
+    static EmbeddedFile *head;
+
+    std::string filename;
+    const void *content;
+    EmbeddedFile *next = nullptr;
+
+    EmbeddedFile(const std::string &filename, const void *content)
+        : filename(filename), content(content)
+    {
+        next = head;
+        head = this;
+    }
+};
+
+#endif
+
+const void *get_chipdb(const std::string &filename);
+
+NEXTPNR_NAMESPACE_END
+
+#endif // EMBED_H