From 97d7c330127cc55ef11d48ed1ced9cb0ed58dd56 Mon Sep 17 00:00:00 2001
From: Joseph Walton-Rivers <joseph@walton-rivers.uk>
Date: Sat, 23 Jul 2022 13:32:07 +0100
Subject: [PATCH] add guid support
---
fggl/CMakeLists.txt | 6 ++--
fggl/util/CMakeLists.txt | 4 +++
fggl/util/guid.cpp | 46 ++++++++++++++++++++++++++
include/fggl/util/guid.hpp | 66 ++++++++++++++++++++++++++++++++++++++
4 files changed, 120 insertions(+), 2 deletions(-)
create mode 100644 fggl/util/CMakeLists.txt
create mode 100644 fggl/util/guid.cpp
create mode 100644 include/fggl/util/guid.hpp
diff --git a/fggl/CMakeLists.txt b/fggl/CMakeLists.txt
index 5794754..d7c20d1 100644
--- a/fggl/CMakeLists.txt
+++ b/fggl/CMakeLists.txt
@@ -31,6 +31,10 @@ if (CLANG_TIDY_FOUND)
set(CMAKE_CXX_CLANG_TIDY clang-tidy -checks=*,-llvmlibc-*,-fuchsia-*,-cppcoreguidelines-*,-android-*,-llvm-*,-altera-*,-modernize-use-trailing-return-type)
endif ()
+# the important stuff everything else uses
+add_subdirectory(math)
+add_subdirectory(util)
+
target_sources(${PROJECT_NAME}
PRIVATE
app.cpp
@@ -58,8 +62,6 @@ target_sources(${PROJECT_NAME}
gui/fonts.cpp
)
-add_subdirectory(math)
-
# yaml-cpp for configs and storage
find_package(yaml-cpp)
target_link_libraries(fggl PUBLIC yaml-cpp)
diff --git a/fggl/util/CMakeLists.txt b/fggl/util/CMakeLists.txt
new file mode 100644
index 0000000..1cb7bb3
--- /dev/null
+++ b/fggl/util/CMakeLists.txt
@@ -0,0 +1,4 @@
+target_sources(fggl
+ PRIVATE
+ guid.cpp
+)
\ No newline at end of file
diff --git a/fggl/util/guid.cpp b/fggl/util/guid.cpp
new file mode 100644
index 0000000..569353d
--- /dev/null
+++ b/fggl/util/guid.cpp
@@ -0,0 +1,46 @@
+/*
+ * This file is part of FGGL.
+ *
+ * FGGL is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any
+ * later version.
+ *
+ * FGGL is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License along with FGGL.
+ * If not, see <https://www.gnu.org/licenses/>.
+ */
+
+//
+// Created by webpigeon on 23/07/22.
+//
+
+#include <map>
+#include <string>
+#include <cassert>
+
+#include "fggl/util/guid.hpp"
+
+namespace fggl::util {
+ static std::map<GUID, std::string> guidTable;
+
+ GUID internString(const char* str) {
+ GUID guid = make_guid(str);
+ auto tableValue = guidTable.find(guid);
+ if (tableValue != guidTable.end()) {
+ assert(tableValue->second == str);
+ } else {
+ guidTable[guid] = str;
+ }
+ }
+
+ std::string guidToString(GUID guid) {
+ auto tableValue = guidTable.find(guid);
+ if (tableValue != guidTable.end()) {
+ return tableValue->second;
+ } else {
+ return "FGGL_UNKNOWN_GUID";
+ }
+ }
+}
diff --git a/include/fggl/util/guid.hpp b/include/fggl/util/guid.hpp
new file mode 100644
index 0000000..77b2fc3
--- /dev/null
+++ b/include/fggl/util/guid.hpp
@@ -0,0 +1,66 @@
+/*
+ * This file is part of FGGL.
+ *
+ * FGGL is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any
+ * later version.
+ *
+ * FGGL is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License along with FGGL.
+ * If not, see <https://www.gnu.org/licenses/>.
+ */
+
+//
+// Created by webpigeon on 23/07/22.
+//
+
+#ifndef FGGL_UTIL_GUID_HPP
+#define FGGL_UTIL_GUID_HPP
+
+#include <cstdint>
+#include "fggl/util/safety.hpp"
+
+namespace fggl::util {
+
+ using GUID = OpaqueName<std::uint64_t, struct GuidTag>;
+
+ constexpr uint32_t FNV_PRIME_32 = 0x01000193;
+ constexpr uint32_t FNV_OFFSET_BASIS_32 = 0x811c9dc5;
+ constexpr uint64_t FNV_PRIME_64 = 0x00000100000001B3;
+ constexpr uint64_t FNV_OFFSET_BASIS_64 = 0xcbf29ce484222325;
+
+ constexpr uint32_t hash_fnv0a_32(const char* str) {
+ uint32_t hash = FNV_OFFSET_BASIS_32;
+ for (int i = 0; str[i] != '\0'; i++) {
+ hash = hash ^ str[i];
+ hash = hash * FNV_PRIME_32;
+ }
+ return hash;
+ }
+
+ constexpr uint64_t hash_fnv0a_64(const char* str) {
+ uint64_t hash = FNV_OFFSET_BASIS_64;
+ for (int i = 0; str[i] != '\0'; i++) {
+ hash = hash ^ str[i];
+ hash = hash * FNV_PRIME_64;
+ }
+ return hash;
+ }
+
+ constexpr GUID make_guid(const char* str) {
+ return GUID::make(hash_fnv0a_64(str));
+ }
+
+ constexpr GUID operator ""_fid(const char* str) {
+ return make_guid(str);
+ }
+
+ // debug-only functions
+ GUID internString(const char* str);
+ std::string guidToString(GUID guid);
+
+} // namespace fggl::util
+
+#endif //FGGL_UTIL_GUID_HPP
--
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