New messagebox system

game_payload/src/msg.c

@@ -0,0 +1,37 @@
+#include <windows.h>
+#include <stdio.h>
+
+#include <msg.h>
+
+#define DEF_MSG_FN(name, type, printfn, mbfn, projname, flags, suffix) \
+    void name(const type *format, ...) { \
+        va_list args; \
+        va_start(args, format); \
+        \
+        int count = printfn(NULL, 0, format, args) + 1; \
+        \
+        type *buf = malloc(count * sizeof(type)); \
+        printfn(buf, count, format, args); \
+        \
+        mbfn(NULL, buf, projname, flags); \
+        \
+        va_end(args); \
+        \
+        free(buf); \
+        suffix; \
+    }
+
+const char    *TITLE_A = "Jadeite Autopatcher";
+const wchar_t *TITLE_W = L"Jadeite Autopatcher";
+
+// Error
+DEF_MSG_FN(msg_err_a, char, _vsnprintf, MessageBoxA, TITLE_A, MB_OK | MB_ICONERROR, exit(1))
+DEF_MSG_FN(msg_err_w, wchar_t, _vsnwprintf, MessageBoxW, TITLE_W, MB_OK | MB_ICONERROR, exit(1))
+
+// Warn
+DEF_MSG_FN(msg_warn_a, char, _vsnprintf, MessageBoxA, TITLE_A, MB_OK | MB_ICONEXCLAMATION,)
+DEF_MSG_FN(msg_warn_w, wchar_t, _vsnwprintf, MessageBoxW, TITLE_W, MB_OK | MB_ICONEXCLAMATION,)
+
+// Info
+DEF_MSG_FN(msg_info_a, char, _vsnprintf, MessageBoxA, TITLE_A, MB_OK | MB_ICONINFORMATION,)
+DEF_MSG_FN(msg_info_w, wchar_t, _vsnwprintf, MessageBoxW, TITLE_W, MB_OK | MB_ICONINFORMATION,)