Add proper fast IdString

Signed-off-by: Clifford Wolf <clifford@clifford.at>

1 files changed, 35 insertions, 0 deletions

diff --git a/common/nextpnr.cc b/common/nextpnr.cc
new file mode 100644
index 00000000..ce2cef63
--- /dev/null
+++ b/common/nextpnr.cc
@@ -0,0 +1,35 @@
+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2018  Clifford Wolf <clifford@clifford.at>
+ *
+ *  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.
+ *
+ */
+
+#include "nextpnr.h"
+
+NEXTPNR_NAMESPACE_BEGIN
+
+std::unordered_map<std::string, int> *IdString::database_str_to_idx = nullptr;
+std::vector<const std::string*> *IdString::database_idx_to_str = nullptr;
+
+void IdString::initialize()
+{
+    database_str_to_idx = new std::unordered_map<std::string, int>;
+    database_idx_to_str = new std::vector<const std::string*>;
+    auto insert_rc = database_str_to_idx->insert({std::string(), 0});
+    database_idx_to_str->push_back(&insert_rc.first->first);
+}
+
+NEXTPNR_NAMESPACE_END