use proper save base path for cosaves

docs/changelog.txt

@@ -56,6 +56,7 @@ Template for new versions:
 ## New Features
 
 ## Fixes
+- Honor the "portable mode" preference setting for locating save folders. Fixes DFHack cosaves not working.
 
 ## Misc Improvements
 

library/include/modules/DFSDL.h

@@ -21,54 +21,60 @@ namespace DFHack
         SDL_Rect* rect; // from which coords (NULL to draw whole surface)
         SDL_Rect* dstResize; // if not NULL dst rect will be resized (x/y/w/h will be added to original dst)
     };
+}
 
 /**
  * The DFSDL module - provides access to SDL functions without actually
  * requiring build-time linkage to SDL
  * \ingroup grp_modules
  * \ingroup grp_dfsdl
  */
-namespace DFSDL
+namespace DFHack::DFSDL
 {
+    /**
+        * Call this on DFHack init so we can load the SDL functions. Returns false on
+        * failure.
+        */
+    bool init(DFHack::color_ostream& out);
 
-/**
- * Call this on DFHack init so we can load the SDL functions. Returns false on
- * failure.
- */
-bool init(DFHack::color_ostream &out);
+    /**
+        * Call this when DFHack is being unloaded.
+        */
+    void cleanup();
 
-/**
- * Call this when DFHack is being unloaded.
- */
-void cleanup();
+    DFHACK_EXPORT SDL_Surface* DFIMG_Load(const char* file);
+    DFHACK_EXPORT SDL_Surface* DFSDL_CreateRGBSurface(uint32_t flags, int width, int height, int depth, uint32_t Rmask, uint32_t Gmask, uint32_t Bmask, uint32_t Amask);
+    DFHACK_EXPORT SDL_Surface* DFSDL_CreateRGBSurfaceFrom(void* pixels, int width, int height, int depth, int pitch, uint32_t Rmask, uint32_t Gmask, uint32_t Bmask, uint32_t Amask);
+    DFHACK_EXPORT int DFSDL_UpperBlit(SDL_Surface* src, const SDL_Rect* srcrect, SDL_Surface* dst, SDL_Rect* dstrect);
+    DFHACK_EXPORT SDL_Surface* DFSDL_ConvertSurface(SDL_Surface* src, const SDL_PixelFormat* fmt, uint32_t flags);
+    DFHACK_EXPORT void DFSDL_FreeSurface(SDL_Surface* surface);
+    // DFHACK_EXPORT int DFSDL_SemWait(SDL_sem *sem);
+    // DFHACK_EXPORT int DFSDL_SemPost(SDL_sem *sem);
+    DFHACK_EXPORT int DFSDL_PushEvent(SDL_Event* event);
+    DFHACK_EXPORT void DFSDL_free(void* ptr);
+    DFHACK_EXPORT SDL_PixelFormat* DFSDL_AllocFormat(uint32_t pixel_format);
+    DFHACK_EXPORT SDL_Surface* DFSDL_CreateRGBSurfaceWithFormat(uint32_t flags, int width, int height, int depth, uint32_t format);
+    DFHACK_EXPORT int DFSDL_ShowSimpleMessageBox(uint32_t flags, const char* title, const char* message, SDL_Window* window);
 
-DFHACK_EXPORT SDL_Surface * DFIMG_Load(const char *file);
-DFHACK_EXPORT SDL_Surface * DFSDL_CreateRGBSurface(uint32_t flags, int width, int height, int depth, uint32_t Rmask, uint32_t Gmask, uint32_t Bmask, uint32_t Amask);
-DFHACK_EXPORT SDL_Surface * DFSDL_CreateRGBSurfaceFrom(void *pixels, int width, int height, int depth, int pitch, uint32_t Rmask, uint32_t Gmask, uint32_t Bmask, uint32_t Amask);
-DFHACK_EXPORT int DFSDL_UpperBlit(SDL_Surface *src, const SDL_Rect *srcrect, SDL_Surface *dst, SDL_Rect *dstrect);
-DFHACK_EXPORT SDL_Surface * DFSDL_ConvertSurface(SDL_Surface *src, const SDL_PixelFormat *fmt, uint32_t flags);
-DFHACK_EXPORT void DFSDL_FreeSurface(SDL_Surface *surface);
-// DFHACK_EXPORT int DFSDL_SemWait(SDL_sem *sem);
-// DFHACK_EXPORT int DFSDL_SemPost(SDL_sem *sem);
-DFHACK_EXPORT int DFSDL_PushEvent(SDL_Event *event);
-DFHACK_EXPORT void DFSDL_free(void *ptr);
-DFHACK_EXPORT SDL_PixelFormat* DFSDL_AllocFormat(uint32_t pixel_format);
-DFHACK_EXPORT SDL_Surface* DFSDL_CreateRGBSurfaceWithFormat(uint32_t flags, int width, int height, int depth, uint32_t format);
-DFHACK_EXPORT int DFSDL_ShowSimpleMessageBox(uint32_t flags, const char *title, const char *message, SDL_Window *window);
+    // submitted and returned text is UTF-8
+    // see wrapper functions below for cp-437 variants
+    DFHACK_EXPORT char* DFSDL_GetClipboardText();
+    DFHACK_EXPORT int DFSDL_SetClipboardText(const char* text);
 
-// submitted and returned text is UTF-8
-// see wrapper functions below for cp-437 variants
-DFHACK_EXPORT char * DFSDL_GetClipboardText();
-DFHACK_EXPORT int DFSDL_SetClipboardText(const char *text);
+    DFHACK_EXPORT char* DFSDL_GetPrefPath(const char* org, const char* app);
+    DFHACK_EXPORT char* DFSDL_GetBasePath();
 
 }
 
-// System clipboard -- submitted and returned text must be in CP437
-DFHACK_EXPORT std::string getClipboardTextCp437();
-DFHACK_EXPORT bool setClipboardTextCp437(std::string text);
+namespace DFHack
+{
+
+    // System clipboard -- submitted and returned text must be in CP437
+    DFHACK_EXPORT std::string getClipboardTextCp437();
+    DFHACK_EXPORT bool setClipboardTextCp437(std::string text);
 
-// interprets 0xa as newline instead of usual CP437 char
-DFHACK_EXPORT bool getClipboardTextCp437Multiline(std::vector<std::string> * lines);
-DFHACK_EXPORT bool setClipboardTextCp437Multiline(std::string text);
+    // interprets 0xa as newline instead of usual CP437 char
+    DFHACK_EXPORT bool getClipboardTextCp437Multiline(std::vector<std::string> * lines);
+    DFHACK_EXPORT bool setClipboardTextCp437Multiline(std::string text);
 
 }

library/modules/DFSDL.cpp

@@ -58,6 +58,8 @@ void (*g_SDL_free)(void *);
 SDL_PixelFormat* (*g_SDL_AllocFormat)(uint32_t pixel_format) = nullptr;
 SDL_Surface* (*g_SDL_CreateRGBSurfaceWithFormat)(uint32_t flags, int width, int height, int depth, uint32_t format) = nullptr;
 int (*g_SDL_ShowSimpleMessageBox)(uint32_t flags, const char *title, const char *message, SDL_Window *window) = nullptr;
+char* (*g_SDL_GetPrefPath)(const char* org, const char* app) = nullptr;
+char* (*g_SDL_GetBasePath)() = nullptr;
 
 bool DFSDL::init(color_ostream &out) {
     for (auto &lib_str : SDL_LIBS) {
@@ -101,6 +103,8 @@ bool DFSDL::init(color_ostream &out) {
     bind(g_sdl_handle, SDL_AllocFormat);
     bind(g_sdl_handle, SDL_CreateRGBSurfaceWithFormat);
     bind(g_sdl_handle, SDL_ShowSimpleMessageBox);
+    bind(g_sdl_handle, SDL_GetPrefPath);
+    bind(g_sdl_handle, SDL_GetBasePath);
 #undef bind
 
     DEBUG(dfsdl,out).print("sdl successfully loaded\n");
@@ -175,6 +179,16 @@ SDL_Surface* DFSDL::DFSDL_CreateRGBSurfaceWithFormat(uint32_t flags, int width,
     return g_SDL_CreateRGBSurfaceWithFormat(flags, width, height, depth, format);
 }
 
+char* DFSDL::DFSDL_GetPrefPath(const char* org, const char* app)
+{
+    return g_SDL_GetPrefPath(org, app);
+}
+
+char* DFSDL::DFSDL_GetBasePath()
+{
+    return g_SDL_GetBasePath();
+}
+
 int DFSDL::DFSDL_ShowSimpleMessageBox(uint32_t flags, const char *title, const char *message, SDL_Window *window) {
     if (!g_SDL_ShowSimpleMessageBox)
         return -1;

library/modules/Persistence.cpp

@@ -29,12 +29,14 @@ distribution.
 #include "LuaTools.h"
 #include "MemAccess.h"
 
+#include "modules/DFSDL.h"
 #include "modules/Filesystem.h"
 #include "modules/Gui.h"
 #include "modules/Persistence.h"
 #include "modules/World.h"
 
 #include "df/world.h"
+#include "df/init.h"
 
 #include <json/json.h>
 
@@ -184,7 +186,14 @@ static std::string filterSaveFileName(std::string s) {
 }
 
 static std::filesystem::path getSavePath(const std::string &world) {
-    return std::filesystem::path{} / "save" / world;
+    auto getsavebase = []() {
+        if (df::global::init->media.flag.is_set(df::enums::init_media_flags::PORTABLE_MODE))
+            return DFSDL::DFSDL_GetPrefPath("Bay 12 Games", "Dwarf Fortress");
+        else
+            return DFSDL::DFSDL_GetBasePath();
+        };
+    std::filesystem::path base{ getsavebase() };
+    return base / "save" / world;
 }
 
 static std::filesystem::path getSaveFilePath(const std::string &world, const std::string &name) {