Fix program entry point on win32, allows debugging SDL builds under MSVC.

git-svn-id: https://svn.eduke32.com/eduke32@4983 1a8010ca-5511-0410-912e-c29ae57300e0

polymer/eduke32/build/include/winbits.h

@@ -30,3 +30,4 @@ extern LPTSTR GetWindowsErrorMsg(DWORD code);
 extern int32_t addsearchpath_ProgramFiles(const char *p);
 
 extern int32_t G_GetVersionFromWebsite(char *buffer);
+extern int32_t win_buildargs(char **argvbuf);

polymer/eduke32/build/src/sdlayer.c

@@ -327,7 +327,11 @@ static void sighandler(int signum)
     }
 }
 
+#ifdef _WIN32
+int32_t WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, LPSTR lpCmdLine, int32_t nCmdShow)
+#else
 int32_t main(int32_t argc, char *argv[])
+#endif
 {
     int32_t r;
 
@@ -346,6 +350,11 @@ int32_t main(int32_t argc, char *argv[])
     signal(SIGFPE, sighandler);
 
 #ifdef _WIN32
+    UNREFERENCED_PARAMETER(hInst);
+    UNREFERENCED_PARAMETER(hPrevInst);
+    UNREFERENCED_PARAMETER(lpCmdLine);
+    UNREFERENCED_PARAMETER(nCmdShow);
+
     win_open();
 
     if (!CheckWinVersion())
@@ -366,7 +375,23 @@ int32_t main(int32_t argc, char *argv[])
     maybe_redirect_outputs();
     baselayer_init();
 
+#ifdef _WIN32
+    char *argvbuf;
+    int32_t buildargc = win_buildargs(&argvbuf);
+    const char **buildargv = (const char **) Bmalloc(sizeof(char *)*(buildargc+1));
+    char *wp = argvbuf;
+
+    for (int i=0; i<buildargc; i++, wp++)
+    {
+        buildargv[i] = wp;
+        while (*wp) wp++;
+    }
+    buildargv[buildargc] = NULL;
+
+    r = app_main(buildargc, (const char **)buildargv);
+#else
     r = app_main(argc, (const char **)argv);
+#endif
 
     startwin_close();
 

polymer/eduke32/build/src/winbits.c

@@ -303,6 +303,69 @@ int32_t addsearchpath_ProgramFiles(const char *p)
     return returncode;
 }
 
+int32_t win_buildargs(char **argvbuf)
+{
+    int32_t buildargc = 0;
+
+    *argvbuf = Bstrdup(GetCommandLine());
+
+    if (*argvbuf)
+    {
+        char quoted = 0, instring = 0, swallownext = 0;
+        char *wp;
+        for (const char *p = wp = *argvbuf; *p; p++)
+        {
+            if (*p == ' ')
+            {
+                if (instring)
+                {
+                    if (!quoted)
+                    {
+                        // end of a string
+                        *(wp++) = 0;
+                        instring = 0;
+                    }
+                    else
+                        *(wp++) = *p;
+                }
+            }
+            else if (*p == '"' && !swallownext)
+            {
+                if (instring)
+                {
+                    if (quoted && p[1] == ' ')
+                    {
+                        // end of a string
+                        *(wp++) = 0;
+                        instring = 0;
+                    }
+                    quoted = !quoted;
+                }
+                else
+                {
+                    instring = 1;
+                    quoted = 1;
+                    buildargc++;
+                }
+            }
+            else if (*p == '\\' && p[1] == '"' && !swallownext)
+                swallownext = 1;
+            else
+            {
+                if (!instring)
+                    buildargc++;
+
+                instring = 1;
+                *(wp++) = *p;
+                swallownext = 0;
+            }
+        }
+        *wp = 0;
+    }
+
+    return buildargc;
+}
+
 
 // Workaround for a bug in mingwrt-4.0.0 and up where a function named main() in misc/src/libcrt/gdtoa/qnan.c takes precedence over the proper one in src/libcrt/crt/main.c.
 #if (defined __MINGW32__ && EDUKE32_GCC_PREREQ(4,8)) || EDUKE32_CLANG_PREREQ(3,4)