Add support for building with CMake

.gitignore

@@ -4,4 +4,5 @@ generated_proto/
 demoinfogo.exe
 demoinfogo.opensdf
 protobuf-2.5.0/
-test.dem
+test.dem
+/out

CMakeLists.txt

@@ -0,0 +1,7 @@
+cmake_minimum_required(VERSION 3.19)
+
+project(csgo-demoinfo)
+
+find_package(protobuf CONFIG REQUIRED)
+
+add_subdirectory(demoinfogo)

CMakePresets.json

@@ -0,0 +1,42 @@
+{
+    "version": 4,
+    "configurePresets": [
+        {
+            "name": "base",
+            "hidden": true,
+            "generator": "Ninja",
+            "binaryDir": "${sourceDir}/out/build/${presetName}",
+            "architecture": {
+                "value": "x64",
+                "strategy": "external"
+            },
+            "cacheVariables": {
+                "CMAKE_C_COMPILER": "cl",
+                "CMAKE_CXX_COMPILER": "cl",
+                "CMAKE_INSTALL_PREFIX": "${sourceDir}/out/install/${presetName}",
+                "CMAKE_PREFIX_PATH": "${sourceDir}/vendor/out/protobuf/${presetName};",
+                "CMAKE_EXPORT_COMPILE_COMMANDS": true
+            }
+        },
+        {
+            "name": "Debug",
+            "inherits": [
+                "base"
+            ],
+            "cacheVariables": {
+                "CMAKE_BUILD_TYPE": "Debug",
+                "CMAKE_MSVC_RUNTIME_LIBRARY": "MultiThreadedDebug"
+            }
+        },
+        {
+            "name": "Release",
+            "inherits": [
+                "base"
+            ],
+            "cacheVariables": {
+                "CMAKE_BUILD_TYPE": "Release",
+                "CMAKE_MSVC_RUNTIME_LIBRARY": "MultiThreaded"
+            }
+        }
+    ]
+}

demoinfogo/CMakeLists.txt

@@ -0,0 +1,46 @@
+# Build protocol buffers.
+#
+add_library(demoinfogo-proto OBJECT STATIC
+    "${CMAKE_CURRENT_LIST_DIR}/cstrike15_usermessages_public.proto"
+    "${CMAKE_CURRENT_LIST_DIR}/netmessages_public.proto"
+)
+
+target_link_libraries(demoinfogo-proto PUBLIC protobuf::libprotobuf)
+
+set(PROTO_BINARY_DIR "${CMAKE_CURRENT_BINARY_DIR}/generated_proto")
+
+target_include_directories(demoinfogo-proto PUBLIC "$<BUILD_INTERFACE:${PROTO_BINARY_DIR}>")
+
+protobuf_generate(
+    TARGET demoinfogo-proto
+    IMPORT_DIRS "${CMAKE_CURRENT_LIST_DIR}"
+    PROTOC_OUT_DIR "${PROTO_BINARY_DIR}"
+)
+
+# Build the executable.
+#
+add_executable(demoinfogo
+    demofile.cpp
+    demofile.h
+
+    demofilebitbuf.cpp
+    demofilebitbuf.h
+
+    demofiledump.cpp
+    demofiledump.h
+
+    demofilepropdecode.cpp
+    demofilepropdecode.h
+
+    demoinfogo.cpp
+)
+
+target_include_directories(demoinfogo PUBLIC ${CMAKE_CURRENT_LIST_DIR} ${CMAKE_CURRENT_BINARY_DIR})
+
+target_link_libraries(demoinfogo demoinfogo-proto)
+
+# Install the executable.
+#
+install(TARGETS demoinfogo
+    RUNTIME DESTINATION "bin"
+)

demoinfogo/README.md

@@ -8,7 +8,7 @@ Demos and network messages in CS:GO use Google's Protocol Buffers (protobuf). Pr
 Building demoinfogo
 -------------------
 
-### Windows
+### Windows
 
 In order to build demoinfogo on Windows, follow these steps:
 
@@ -19,6 +19,37 @@ In order to build demoinfogo on Windows, follow these steps:
 5. Open `demoinfogo/demoinfogo.vcxproj` in Microsoft Visual Studio 2010. Building the Release configuration creates the binary `demoinfogo/demoinfogo.exe`
 
 
+### CMake on Windows
+
+Build and install the following libraries using CMake.
+
+* protobuf v21.12: https://github.com/protocolbuffers/protobuf/releases/tag/v21.12. **Note:** You can build with `-Dprotobuf_WITH_ZLIB=OFF` as ZLIB support is not needed.*
+
+These libraries must be installed into `csgo-demoinfo/vendor/out/{library name}/{preset name}`. For example:
+
+```
+csgo-demoinfogo/
+  ...
+  vendor/
+    out/
+      protobuf/
+        Release/
+        Debug/
+```
+
+To build `demoinfogo` with CMake (in `Release` mode), open a Visual Studio developer console and follow these steps:
+
+```
+cmake --preset Release
+cmake --build out/build/Release --target install
+```
+
+The program can be invoked with:
+
+```
+.\out\install\Release\bin\demoinfogo.exe
+```
+
 Working with Network Messages
 -----------------------------
 

demoinfogo/cstrike15_usermessages_public.proto

@@ -27,6 +27,8 @@
 //
 //=============================================================================
 
+syntax = "proto2";
+
 // We care more about speed than code size
 option optimize_for = SPEED;
 

demoinfogo/netmessages_public.proto

@@ -35,10 +35,11 @@
 // There is an important difference between the signed int types (sint32 and sint64)
 // and the "standard" int types (int32 and int64) when it comes to encoding negative
 // numbers.  If you use int32 or int64 as the type for a negative number, the
-// resulting varint is always ten bytes long � it is, effectively, treated like a
+// resulting varint is always ten bytes long - it is, effectively, treated like a
 // very large unsigned integer.  If you use one of the signed types, the resulting
 // varint uses ZigZag encoding, which is much more efficient.
 
+syntax = "proto2";
 
 // Commenting this out allows it to be compiled for SPEED or LITE_RUNTIME.
 // option optimize_for = SPEED;