demo-writer

.gitignore

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+dmtest/
+build/

CMakeLists.txt

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+if (WIN32)
+    # Needed for MSVC_RUNTIME_LIBRARY
+    cmake_minimum_required(VERSION 3.15.0)
+else()
+    cmake_minimum_required(VERSION 3.10.0)
+endif()
+
+project(demo-writer)
+if (WIN32)
+    enable_language(ASM)
+endif()
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+set(SRC_DIR ${CMAKE_SOURCE_DIR}/src)
+if (WIN32)
+    file(GLOB_RECURSE SRC_FILES
+        "${SRC_DIR}/*.cpp"
+        "${SRC_DIR}/*.h"
+        "${SRC_DIR}/*.hpp"
+        "${SRC_DIR}/*.s"
+    )
+else()
+    file(GLOB_RECURSE SRC_FILES
+        "${SRC_DIR}/*.cpp"
+        "${SRC_DIR}/*.h"
+        "${SRC_DIR}/*.hpp"
+    )
+endif()
+set(SRC_FILES ${SRC_FILES} "${SRC_DIR}/core/subhook/subhook.c")
+
+add_library(demo-writer SHARED ${SRC_FILES})
+source_group(TREE ${SRC_DIR} FILES ${SRC_FILES})
+if (WIN32)
+    set_property(TARGET demo-writer PROPERTY MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>")
+    if (MSVC)
+        target_compile_options(demo-writer PRIVATE "/MP")
+    else()
+        target_link_libraries(demo-writer PRIVATE "ws2_32" "psapi" "-static-libgcc" "-static-libstdc++" "-static")
+    endif()
+    target_compile_definitions(demo-writer PRIVATE WIN32_LEAN_AND_MEAN SUBHOOK_IMPLEMENTATION)
+else()
+    set_target_properties(demo-writer PROPERTIES COMPILE_OPTIONS "-m32" LINK_FLAGS "-m32")
+endif()

cmake/i686-w64-mingw32.cmake

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+set(GNU_HOST i686-w64-mingw32)
+set(CMAKE_SYSTEM_PROCESSOR "i686")
+
+set(COMPILER_PREFIX "${GNU_HOST}-")
+set(COMPILER_SUFFIX "-posix")
+
+set(CMAKE_SYSTEM_NAME "Windows")
+set(CMAKE_CROSSCOMPILING TRUE)
+set(WIN32 TRUE)
+set(MINGW TRUE)
+
+set(CMAKE_C_COMPILER ${COMPILER_PREFIX}gcc${COMPILER_SUFFIX})
+set(CMAKE_CXX_COMPILER ${COMPILER_PREFIX}g++${COMPILER_SUFFIX})
+set(CMAKE_RC_COMPILER ${COMPILER_PREFIX}windres)
+
+set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

src/core/byond_constants.h

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+#pragma once
+
+enum DataType : unsigned char
+{
+	NULL_D = 0x00,
+	TURF = 0x01,
+	OBJ = 0x02,
+	MOB = 0x03,
+	AREA = 0x04,
+	CLIENT = 0x05,
+	STRING = 0x06,
+	MOB_TYPEPATH = 0x08,
+	OBJ_TYPEPATH = 0x09,
+	TURF_TYPEPATH = 0x0A,
+	AREA_TYPEPATH = 0x0B,
+	RESOURCE = 0x0C,
+	IMAGE = 0x0D,
+	WORLD_D = 0x0E,
+	LIST = 0x0F,
+	LIST_ARGS = 0x10,
+	LIST_MOB_VERBS = 0x11,
+	LIST_VERBS = 0x12,
+	LIST_TURF_VERBS = 0x13,
+	LIST_AREA_VERBS = 0x14,
+	LIST_CLIENT_VERBS = 0x15,
+	LIST_SAVEFILE_DIR = 0x16,
+	LIST_MOB_CONTENTS = 0x17,
+	LIST_TURF_CONTENTS = 0x18,
+	LIST_AREA_CONTENTS = 0x19,
+	LIST_WORLD_CONTENTS = 0x1A,
+	LIST_GROUP = 0x1B,
+	LIST_CONTENTS = 0x1C,
+	DATUM_TYPEPATH = 0x20,
+	DATUM = 0x21,
+	SAVEFILE = 0x23,
+	SAVEFILE_TYPEPATH = 0x24,
+	PROCPATH = 0x26,
+	FILE_ = 0x27,
+	LIST_TYPEPATH = 0x28,
+	PREFAB = 0x29,
+	NUMBER = 0x2A,
+	LIST_MOB_VARS = 0x2C,
+	LIST_OBJ_VARS = 0x2D,
+	LIST_TURF_VARS = 0x2E,
+	LIST_AREA_VARS = 0x2F,
+	LIST_CLIENT_VARS = 0x30,
+	LIST_VARS = 0x31, //maybe?
+	LIST_MOB_OVERLAYS = 0x32,
+	LIST_MOB_UNDERLAYS = 0x33,
+	LIST_OVERLAYS = 0x34,
+	LIST_UNDERLAYS = 0x35,
+	LIST_TURF_OVERLAYS = 0x36,
+	LIST_TURF_UNDERLAYS = 0x37,
+	LIST_AREA_OVERLAYS = 0x38,
+	LIST_AREA_UNDERLAYS = 0x39,
+	APPEARANCE = 0x3A,
+	CLIENT_TYPEPATH = 0x3B,
+	IMAGE_TYPEPATH = 0x3F,
+	LIST_IMAGE_OVERLAYS = 0x40,
+	LIST_IMAGE_UNDERLAYS = 0x41,
+	LIST_IMAGE_VARS = 0x42,
+	LIST_IMAGE_VERBS = 0x43,
+	LIST_IMAGE_CONTENTS = 0x44, // wait wtf
+	LIST_CLIENT_IMAGES = 0x46,
+	LIST_CLIENT_SCREEN = 0x47,
+	LIST_TURF_VIS_CONTENTS = 0x4B,
+	LIST_VIS_CONTENTS = 0x4C,
+	LIST_MOB_VIS_CONTENTS = 0x4D,
+	LIST_TURF_VIS_LOCS = 0x4E,
+	LIST_VIS_LOCS = 0x4F,
+	LIST_MOB_VIS_LOCS = 0x50,
+	LIST_WORLD_VARS = 0x51,
+	LIST_GLOBAL_VARS = 0x52,
+	FILTERS = 0x53,
+	LIST_IMAGE_VIS_CONTENTS = 0x54,
+};

src/core/byond_functions.cpp

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+#include "byond_functions.h"
+
+GetStringTableEntryPtr GetStringTableEntry;
+SetTurfAppearancePtr SetTurfAppearance;
+SetAppearancePtr SetAppearance;
+SpliceAppearancePtr SpliceAppearance;
+SpliceStringPtr SpliceString;
+SetPixelXPtr SetPixelX;
+SetPixelYPtr SetPixelY;
+SetPixelWPtr SetPixelW;
+SetPixelZPtr SetPixelZ;
+SetMovableDirPtr SetMovableDir;
+SetLocPtr SetLoc;
+ToStringPtr ToString;
+GetMobAppearancePtr GetMobAppearance;
+GetObjAppearancePtr GetObjAppearance;
+GetVariablePtr GetVariable;
+AllocObjIdPtr AllocObjId;
+AllocMobIdPtr AllocMobId;
+ChangeTurfPtr ChangeTurf;

src/core/byond_functions.h

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+#include "byond_structures.h"
+
+typedef String* (*GetStringTableEntryPtr)(int stringId);
+typedef void(*SetTurfAppearancePtr)(int appearance, int turf);
+typedef void(*SetAppearancePtr)(Value atom, int appearance);
+typedef void(__fastcall *SpliceAppearancePtr)(void* this_, int edx, int appearance); // it's actually __thiscall but c++ compilers are stupid
+typedef void(*SpliceStringPtr)(unsigned int id);
+typedef void(*SetPixelXPtr)(Value atom, short pixel_x);
+typedef SetPixelXPtr SetPixelYPtr;
+typedef SetPixelXPtr SetPixelZPtr;
+typedef SetPixelXPtr SetPixelWPtr;
+typedef void(*SetMovableDirPtr)(Value atom, unsigned char dir);
+typedef void(*SetLocPtr)(Value atom, Value loc);
+typedef unsigned int(*ToStringPtr)(int type, int value);
+typedef unsigned int(*GetObjAppearancePtr)(unsigned int id);
+typedef unsigned int(*GetMobAppearancePtr)(unsigned int id);
+typedef Value(*GetVariablePtr)(Value datum, unsigned int varNameId);
+typedef int(*AllocObjIdPtr)();
+typedef int(*AllocMobIdPtr)();
+typedef void(*ChangeTurfPtr)(int a, int b, int type, Value turf);
+
+extern GetStringTableEntryPtr GetStringTableEntry;
+extern SetTurfAppearancePtr SetTurfAppearance;
+extern SetAppearancePtr SetAppearance;
+extern SpliceAppearancePtr SpliceAppearance;
+extern SpliceStringPtr SpliceString;
+extern SetPixelXPtr SetPixelX;
+extern SetPixelYPtr SetPixelY;
+extern SetPixelWPtr SetPixelW;
+extern SetPixelZPtr SetPixelZ;
+extern SetMovableDirPtr SetMovableDir;
+extern SetLocPtr SetLoc;
+extern ToStringPtr ToString;
+extern GetMobAppearancePtr GetMobAppearance;
+extern GetObjAppearancePtr GetObjAppearance;
+extern GetVariablePtr GetVariable;
+extern AllocObjIdPtr AllocObjId;
+extern AllocMobIdPtr AllocMobId;
+extern ChangeTurfPtr ChangeTurf;