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sdl2: SDL_GetPrefPath

--- a/include/npe/SDL2/SDL.h

+++ b/include/npe/SDL2/SDL.h

@@ -127,6 +127,7 @@

 SDL_Cursor *SDL_CreateSystemCursor(SDL_SystemCursor id);

 SDL_Texture *SDL_CreateTextureFromSurface(SDL_Renderer *r, SDL_Surface *s);

 char *SDL_GetBasePath(void);

+char *SDL_GetPrefPath(char *org, char *app);

 int SDL_SetRenderDrawColor(SDL_Renderer *r, Uint8 r, Uint8 g, Uint8 b, Uint8 a);

 int SDL_GetCurrentDisplayMode(int displayIndex, SDL_DisplayMode *mode);

--- a/libnpe_sdl2/sdl2.c

+++ b/libnpe_sdl2/sdl2.c

@@ -7,6 +7,7 @@

 #include <cursor.h>

 #include <plumb.h>

 #include <SDL2/SDL.h>

+#include <sys/stat.h>

 typedef struct Audiodev Audiodev;

@@ -1336,6 +1337,40 @@

 SDL_GetBasePath(void)

 {

 	return strdup(basepath);

+}

+

+static int

+mkdirp(char *s, int perm)

+{

+	char *p;

+	int n;

+

+	for(p = strchr(s+1, '/'); p; p = strchr(p+1, '/')){

+		*p = 0;

+		n = access(s, AEXIST) == 0 || mkdir(s, perm) == 0 ? 0 : -1;

+		*p = '/';

+		if(n != 0)

+			return n;

+	}

+	if(access(s, AEXIST) != 0)

+		return mkdir(s, perm);

+

+	return 0;

+}

+

+char *

+SDL_GetPrefPath(char *org, char *app)

+{

+	char *home, *p;

+

+	p = nil;

+	if((home = getenv("home")) != nil){

+		if((p = smprint("%s/lib/%s/%s", home, org, app)) != nil)

+			mkdirp(cleanname(p), 0755);

+		free(home);

+	}

+

+	return p;

 }

 SDL_bool