Add the fmt library as a dependency and add some examples

Attempt at fixing missing functions on some platforms

3rdParty/libfmt/CMakeLists.txt

@@ -0,0 +1,18 @@
+if(NOT DEVILUTIONX_SYSTEM_LIBFMT)
+  include(FetchContent_MakeAvailableExcludeFromAll)
+
+  add_definitions(-D_POSIX_C_SOURCE=200809L)
+
+  if(DEVILUTIONX_STATIC_LIBFMT)
+    set(BUILD_SHARED_LIBS OFF)
+  else()
+    set(BUILD_SHARED_LIBS ON)
+  endif()
+  include(FetchContent)
+  FetchContent_Declare(fmt
+      GIT_REPOSITORY https://github.com/fmtlib/fmt.git
+      GIT_TAG 7bdf0628b1276379886c7f6dda2cef2b3b374f0b
+  )
+  FetchContent_MakeAvailableExcludeFromAll(fmt)
+  set(fmt_SOURCE_DIR ${fmt_SOURCE_DIR} PARENT_SCOPE) 
+endif()

CMakeLists.txt

@@ -43,6 +43,10 @@ option(DEVILUTIONX_SYSTEM_LIBSODIUM "Use system-provided libsodium" ON)
 cmake_dependent_option(DEVILUTIONX_STATIC_LIBSODIUM "Link static libsodium" OFF
                        "DEVILUTIONX_SYSTEM_LIBSODIUM AND NOT DIST" ON)
 
+option(DEVILUTIONX_SYSTEM_LIBFMT "Use system-provided libfmt" OFF)
+cmake_dependent_option(DEVILUTIONX_STATIC_LIBFMT "Link static libfmt" OFF
+                       "DEVILUTIONX_STATIC_LIBFMT AND NOT DIST" ON)
+
 if(NOT VERSION_NUM)
   include(CMake/git.cmake)
   get_git_tag(VERSION_NUM)
@@ -169,6 +173,13 @@ if(NOT NONET)
   endif()
 endif()
 
+if(DEVILUTIONX_SYSTEM_LIBFMT)
+  set(fmt_USE_STATIC_LIBS ${DEVILUTIONX_STATIC_LIBFMT})
+  find_package(fmt REQUIRED)
+else()
+  add_subdirectory(3rdParty/libfmt)
+endif()
+
 if(USE_SDL1)
   find_package(SDL REQUIRED)
   find_package(SDL_ttf REQUIRED)
@@ -456,6 +467,7 @@ target_include_directories(${BIN_TARGET} PRIVATE
   3rdParty/asio/include
   3rdParty/Radon/Radon/include
   3rdParty/libsmacker
+  ${fmt_SOURCE_DIR}/include
   ${CMAKE_CURRENT_BINARY_DIR})
 
 if(NOT N3DS)
@@ -473,6 +485,8 @@ if(NOT NONET)
   target_link_libraries(${BIN_TARGET} PRIVATE sodium)
 endif()
 
+target_link_libraries(${BIN_TARGET} PRIVATE fmt)
+
 genex_for_option(DEBUG)
 target_compile_definitions(${BIN_TARGET} PUBLIC "$<${DEBUG_GENEX}:_DEBUG>")
 target_compile_definitions(${BIN_TARGET} PRIVATE ASIO_STANDALONE)

Source/DiabloUI/selgame.cpp

@@ -11,6 +11,8 @@
 #include "options.h"
 #include "storm/storm.h"
 
+#include <fmt/format.h>
+
 namespace devilution {
 
 char selgame_Label[32];
@@ -410,10 +412,11 @@ static bool IsGameCompatible(GameData *data)
 	if (data->programid != GAME_ID) {
 		UiSelOkDialog(title, "The host is running a different game than you.", false);
 	} else {
-		char msg[64];
-		sprintf(msg, "Your version %s does not match the host %d.%d.%d.", PROJECT_VERSION, PROJECT_VERSION_MAJOR, PROJECT_VERSION_MINOR, PROJECT_VERSION_PATCH);
-
-		UiSelOkDialog(title, msg, false);
+		// An example of using a format with references. Note the references that allow a localized string to change the order of the inserted parameters.
+		// Note that named insertions would probably be better here, but this is just to provide an example.
+		auto msg = fmt::format("Your version {0} does not match the host {1}.{2}.{3}.", PROJECT_VERSION, PROJECT_VERSION_MAJOR, PROJECT_VERSION_MINOR, PROJECT_VERSION_PATCH);
+		
+		UiSelOkDialog(title, msg.c_str(), false);
 	}
 
 	LoadBackgroundArt("ui_art\\selgame.pcx");

Source/debug.cpp

@@ -7,6 +7,9 @@
 #include "cursor.h"
 #include "inv.h"
 #include "spells.h"
+#include "utils/format.hpp"
+
+#include <fmt/format.h>
 
 namespace devilution {
 

Source/init.cpp

@@ -14,6 +14,7 @@
 #include "storm/storm.h"
 #include "utils/paths.h"
 #include "utils/ui_fwd.h"
+#include "utils/log.hpp"
 
 #ifdef __vita__
 // increase default allowed heap size on Vita

Source/stores.cpp

@@ -6,6 +6,7 @@
 #include "stores.h"
 
 #include <algorithm>
+#include <fmt/format.h>
 
 #include "cursor.h"
 #include "init.h"
@@ -270,8 +271,9 @@ void S_StartSBuy()
 	stextsize = true;
 	stextscrl = true;
 	stextsval = 0;
-	sprintf(tempstr, "I have these items for sale:             Your gold: %i", plr[myplr]._pGold);
-	AddSText(0, 1, true, tempstr, COL_GOLD, false);
+	// An example of a named format insertion.
+	auto str = fmt::format("I have these items for sale:             Your gold: {gold}", fmt::arg("gold", plr[myplr]._pGold));
+	AddSText(0, 1, true, str.c_str(), COL_GOLD, false);
 	AddSLine(3);
 	AddSLine(21);
 	S_ScrollSBuy(stextsval);

Source/utils/format.hpp

@@ -0,0 +1,57 @@
+#pragma once
+
+#include "../player.h"
+
+#include <fmt/format.h>
+
+namespace fmt {
+
+template <>
+struct formatter<devilution::PLR_MODE> : formatter<string_view> {
+	template <typename FormatContext>
+	auto format(devilution::PLR_MODE mode, FormatContext &ctx)
+	{
+		string_view name = "unknown";
+		switch (mode) {
+		case devilution::PM_STAND:
+			name = "stand";
+			break;
+		case devilution::PM_WALK:
+			name = "walk (N, NW, or NE)";
+			break;
+		case devilution::PM_WALK2:
+			name = "walk (S, SW, or SE)";
+			break;
+		case devilution::PM_WALK3:
+			name = "walk (W or E)";
+			break;
+		case devilution::PM_ATTACK:
+			name = "attack";
+			break;
+		case devilution::PM_RATTACK:
+			name = "ranged attack";
+			break;
+		case devilution::PM_BLOCK:
+			name = "block";
+			break;
+		case devilution::PM_GOTHIT:
+			name = "got hit";
+			break;
+		case devilution::PM_DEATH:
+			name = "death";
+			break;
+		case devilution::PM_SPELL:
+			name = "spell";
+			break;
+		case devilution::PM_NEWLVL:
+			name = "new level";
+			break;
+		case devilution::PM_QUIT:
+			name = "quit";
+			break;
+		}
+		return formatter<string_view>::format(name, ctx);
+	}
+};
+
+}

Source/utils/log.hpp

@@ -0,0 +1,91 @@
+#pragma once
+
+#include "fmt/core.h"
+#include "fmt/ranges.h"
+
+#include <SDL.h>
+
+#ifdef USE_SDL1
+#include "sdl2_to_1_2_backports.h"
+#endif
+
+namespace devilution {
+
+enum class LogCategory {
+	Application = SDL_LOG_CATEGORY_APPLICATION,
+	Error = SDL_LOG_CATEGORY_ERROR,
+	Assert = SDL_LOG_CATEGORY_ASSERT,
+	System = SDL_LOG_CATEGORY_SYSTEM,
+	Audio = SDL_LOG_CATEGORY_AUDIO,
+	Video = SDL_LOG_CATEGORY_VIDEO,
+	Render = SDL_LOG_CATEGORY_RENDER,
+	Input = SDL_LOG_CATEGORY_INPUT,
+	Test = SDL_LOG_CATEGORY_TEST,
+};
+
+enum class LogPriority {
+    Verbose = SDL_LOG_PRIORITY_VERBOSE,
+    Debug = SDL_LOG_PRIORITY_DEBUG,
+    Info = SDL_LOG_PRIORITY_INFO,
+    Warn = SDL_LOG_PRIORITY_WARN,
+    Error = SDL_LOG_PRIORITY_ERROR,
+    Critical = SDL_LOG_PRIORITY_CRITICAL,
+};
+
+template <typename... Args>
+void Log(const char *fmt, Args &&... args)
+{
+	auto str = fmt::format(fmt, std::forward<Args>(args)...);
+	SDL_Log("%s", str.c_str());
+}
+
+template <typename... Args>
+void LogVerbose(LogCategory category, const char *fmt, Args &&... args)
+{
+	auto str = fmt::format(fmt, std::forward<Args>(args)...);
+	SDL_LogVerbose(static_cast<int>(category), "%s", str.c_str());
+}
+
+template <typename... Args>
+void LogDebug(LogCategory category, const char *fmt, Args &&... args)
+{
+	auto str = fmt::format(fmt, std::forward<Args>(args)...);
+	SDL_LogDebug(static_cast<int>(category), "%s", str.c_str());
+}
+
+template <typename... Args>
+void LogInfo(LogCategory category, const char *fmt, Args &&... args)
+{
+	auto str = fmt::format(fmt, std::forward<Args>(args)...);
+	SDL_LogInfo(static_cast<int>(category), "%s", str.c_str());
+}
+
+template <typename... Args>
+void LogWarn(LogCategory category, const char *fmt, Args &&... args)
+{
+	auto str = fmt::format(fmt, std::forward<Args>(args)...);
+	SDL_LogWarn(static_cast<int>(category), "%s", str.c_str());
+}
+
+template <typename... Args>
+void LogError(LogCategory category, const char *fmt, Args &&... args)
+{
+	auto str = fmt::format(fmt, std::forward<Args>(args)...);
+	SDL_LogError(static_cast<int>(category), "%s", str.c_str());
+}
+
+template <typename... Args>
+void LogCritical(LogCategory category, const char *fmt, Args &&... args)
+{
+	auto str = fmt::format(fmt, std::forward<Args>(args)...);
+	SDL_LogCritical(static_cast<int>(category), "%s", str.c_str());
+}
+
+template <typename... Args>
+void LogMessageV(LogCategory category, LogPriority priority, const char *fmt, Args &&... args)
+{
+	auto str = fmt::format(fmt, std::forward<Args>(args)...);
+	SDL_LogMessageV(static_cast<int>(category), static_cast<SDL_LogPriority>(priority), "%s", str.c_str());
+}
+
+} // namespace devilution