From Descent 3 Steam 2020: Sort mission menu to have retail game things first.

d3-mission-sort.diff

commit 8855673c539fad6949244e3914319ebc29e6885e
Author: Ryan C. Gordon <icculus@icculus.org>
Date:   Sat Jun 15 00:07:18 2019 -0400

    Sort mission menu to have retail game things first.
    
    Pilot Training, Descent 3: Retribution (the main retail game) and
    Mercenary (the mission pack) come first. Third party levels come after.

diff --git a/Main/menu.cpp b/Main/menu.cpp
index 6adeb07..b8354d7 100644
--- a/Main/menu.cpp
+++ b/Main/menu.cpp
@@ -1151,7 +1151,14 @@ inline int count_missions(const char *pathname, const char *wildcard)
 	}
 	return c;
 }
-inline int generate_mission_listbox(newuiListBox *lb, int n_maxfiles, char **filelist, const char *pathname, const char *wildcard)
+
+struct mission_listbox_item
+{
+    char *title;
+    char *filename;
+};
+
+inline int generate_mission_listbox(int n_maxfiles, mission_listbox_item *filelist, const char *pathname, const char *wildcard)
 {
 	int c = 0;
 	char fullpath[_MAX_PATH];
@@ -1168,8 +1175,8 @@ inline int generate_mission_listbox(newuiListBox *lb, int n_maxfiles, char **fil
 					continue;
 				if (GetMissionInfo(filename, &msninfo) && msninfo.name[0] && msninfo.single) {
 					//if (!msninfo.training || (msninfo.training && Current_pilot.find_mission_data(TRAINING_MISSION_NAME)!= -1)) {
-						filelist[c] = mem_strdup(filename);
-						lb->AddItem(msninfo.name);
+						filelist[c].filename = mem_strdup(filename);
+						filelist[c].title = mem_strdup(msninfo.name);
 						filename[0] = 0;
 						c++;
 						if (!(c %2)) DoWaitMessage(true);
@@ -1188,13 +1195,17 @@ extern bool Skip_next_movie;
 #define OEM_MISSION_FILE	"d3oem.mn3"
 bool MenuNewGame()
 {
+	int priority_slot = 0;
 	newuiTiledWindow menu;
 	newuiSheet *select_sheet;
 	newuiListBox *msn_lb;
-	char **filelist = NULL;
+	mission_listbox_item *filelist = NULL;
 	int n_missions,i,res;	//,k
 	bool found = false;
 	bool do_menu = true, load_mission = false, retval = true;
+
+	(void) priority_slot;
+
 #ifdef DEMO
 	if(LoadMission("d3demo.mn3"))
 	{
@@ -1305,9 +1316,11 @@ bool MenuNewGame()
 #endif
 	if (n_missions) {
 	// allocate extra mission slot because of check below which adds a name to the filelist.
-		filelist = (char **)mem_malloc(sizeof(char *)*(n_missions+1));
-		for (i = 0; i < (n_missions+1); i++)
-			filelist[i] = NULL;
+		filelist = (mission_listbox_item *)mem_malloc(sizeof(mission_listbox_item)*(n_missions+1));
+		for (i = 0; i < (n_missions+1); i++) {
+			filelist[i].filename = NULL;
+			filelist[i].title = NULL;
+        }
 	}
 	else {
 		DoMessageBox(TXT_ERROR, TXT_NOMISSIONS, MSGBOX_OK);
@@ -1318,22 +1331,22 @@ bool MenuNewGame()
 // generate real listbox now.
 	i = 0;
 #ifndef RELEASE
-	i = generate_mission_listbox(msn_lb, n_missions, filelist, LocalLevelsDir, "*.msn");
+	i = generate_mission_listbox(n_missions, filelist, LocalLevelsDir, "*.msn");
 #endif
-	i += generate_mission_listbox(msn_lb, n_missions - i, filelist+i, D3MissionsDir, "*.mn3");
+	i += generate_mission_listbox(n_missions - i, filelist+i, D3MissionsDir, "*.mn3");
 
 //rcg10052000 let missions reside in the ~/.loki/descent3/missions dir.
 #ifdef __LINUX__
-	i += generate_mission_listbox(msn_lb, n_missions - i, filelist+i, homepath, "*.mn3");
+	i += generate_mission_listbox(n_missions - i, filelist+i, homepath, "*.mn3");
 #endif
 
 //#ifdef RELEASE
 	int k;
 	for(k=0;k<n_missions;k++)
 	{
-		if(!filelist[k])
+		if(!filelist[k].filename)
 			continue;
-		if(strcmpi(filelist[k],"d3.mn3")==0)
+		if(strcmpi(filelist[k].filename,"d3.mn3")==0)
 		{
 			found = true;
 			break;
@@ -1343,24 +1356,53 @@ bool MenuNewGame()
 	if(!found)
 	{
 #ifdef MACINTOSH
-		filelist[n_missions-1] = mem_strdup("d3.mn3");
+		filelist[n_missions-1].filename = mem_strdup("d3.mn3");
+		filelist[n_missions-1].title = mem_strdup(TXT_MAINMISSION);
 #else
-		filelist[n_missions] = mem_strdup("d3.mn3");
+		filelist[n_missions].filename = mem_strdup("d3.mn3");
+		filelist[n_missions].title = mem_strdup(TXT_MAINMISSION);
 #endif
-		msn_lb->AddItem(TXT_MAINMISSION);
 		n_missions++;
 	}
-//#endif 
+
+	// Adjust the list so Pilot Training is first, the main game is second, and Mercenary is third.  --ryan, 2019.
+	static const char *priority_missions[] = { "training.mn3", "d3.mn3", "merc.mn3", NULL };
+	for (const char **mission = priority_missions; *mission; mission++) {
+		for (i = 0; i < (n_missions+1); i++) {
+			if (!filelist[i].filename) continue;
+			if (strcmpi(filelist[i].filename, *mission) == 0) {
+				if (i != priority_slot) {
+					mission_listbox_item tmp;
+					memcpy(&tmp, &filelist[priority_slot], sizeof (mission_listbox_item));
+					memcpy(&filelist[priority_slot], &filelist[i], sizeof (mission_listbox_item));
+					memcpy(&filelist[i], &tmp, sizeof (mission_listbox_item));
+				}
+				priority_slot++;
+				break;
+			}
+		}
+	}
+
+//#endif
 #else
 #define OEM_MISSION_NAME	"Descent 3: Sol Ascent"
 #define OEM_TRAINING_NAME	"Pilot Training "
 	n_missions=2;
-	filelist = (char **)mem_malloc(sizeof(char *)*2);
-	filelist[0] = mem_strdup(OEM_MISSION_FILE);;
-	msn_lb->AddItem(OEM_MISSION_NAME);
-	filelist[1] = mem_strdup(OEM_TRAINING_FILE);
-	msn_lb->AddItem(OEM_TRAINING_NAME);
+	filelist = (mission_listbox_item *)mem_malloc(sizeof(mission_listbox_item *)*2);
+	filelist[0].filename = mem_strdup(OEM_MISSION_FILE);
+	filelist[0].title = mem_strdup(OEM_MISSION_NAME);
+	filelist[1].filename = mem_strdup(OEM_TRAINING_FILE);
+	filelist[1].title = mem_strdup(OEM_TRAINING_NAME);
 #endif
+
+	// Add the items we dug up to the listbox UI.
+	msn_lb->SetFlag(UILB_NOSORT);
+	for (i = 0; i < (n_missions+1); i++) {
+		if (filelist[i].filename) {
+			msn_lb->AddItem(filelist[i].title);
+		}
+	}
+
 	DoWaitMessage(false);
 redo_newgame_menu:
 // run menu
@@ -1374,7 +1416,7 @@ redo_newgame_menu:
 			tMissionInfo msninfo;
 			int index = msn_lb->GetCurrentIndex();
 			if (index >= 0 && index < n_missions) {
-				if (GetMissionInfo(filelist[index], &msninfo)) {
+				if (GetMissionInfo(filelist[index].filename, &msninfo)) {
 					if (msninfo.name[0]) {
 						newuiTiledWindow infownd;
 						newuiSheet *sheet;
@@ -1410,7 +1452,7 @@ redo_newgame_menu:
 		int index = msn_lb->GetCurrentIndex();
 		char *nameptr=NULL;
 		if (index >=0 && index < n_missions) {
-			nameptr = filelist[index];
+			nameptr = filelist[index].filename;
 		}
 #ifndef OEM
 		if (!nameptr || !LoadMission(nameptr)) {
@@ -1454,8 +1496,11 @@ missions_fail:
 // free all memory
 	for (i = 0; i < n_missions; i++)
 	{
-		if(filelist[i]) {
-			mem_free(filelist[i]);
+		if(filelist[i].filename) {
+			mem_free(filelist[i].filename);
+        }
+		if(filelist[i].title) {
+			mem_free(filelist[i].title);
 		}
 	}
 	if (filelist) {