From f2aa753d493ac8fac41f0041525bfd9d8f54eba6 Mon Sep 17 00:00:00 2001
From: Dmitry Marakasov <amdmi3@amdmi3.ru>
Date: Fri, 12 Sep 2014 20:17:41 +0400
Subject: [PATCH] Fix highscore file handling

Don't create highscore file in the current directory, instead
create in under $XDG_DATA_HOME/2048/highscore or
$HOME/.local/share/2048/highscore as modern apps should.
---
 Makefile             |  8 ++++----
 src/2048.h           | 11 ++++++++++-
 src/highscore_file.c | 29 +++++++++++++++++++++++++++++
 3 files changed, 43 insertions(+), 5 deletions(-)
 create mode 100644 src/highscore_file.c

diff --git a/Makefile b/Makefile
index c5fe6b4..92c2ff5 100644
--- a/Makefile
+++ b/Makefile
@@ -4,11 +4,11 @@ LIBS	= -lcurses
 
 all: 2048
 
-2048: src/2048.c
-	$(CC) $(CFLAGS) src/2048.c -o 2048 $(LIBS)
+2048: src/2048.c src/2048.h src/highscore_file.c
+	$(CC) $(CFLAGS) src/2048.c src/highscore_file.c -o 2048 $(LIBS)
 
-2048nc: src/2048_no_curses.c
-	$(CC) $(CFLAGS) src/2048_no_curses.c -o 2048nc
+2048nc: src/2048_no_curses.c src/2048.h src/highscore_file.c
+	$(CC) $(CFLAGS) src/2048_no_curses.c src/highscore_file.c -o 2048nc
 
 clean:
 	rm -f 2048 2048nc
diff --git a/src/2048.h b/src/2048.h
index d1f5b3e..4681f45 100644
--- a/src/2048.h
+++ b/src/2048.h
@@ -1,6 +1,10 @@
 #ifndef _2048_H_
 #define _2048_H_
 
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <string.h>
+
 typedef enum {
     DIR_UP,
     DIR_RIGHT,
@@ -8,6 +12,11 @@ typedef enum {
     DIR_LEFT
 } dir_t;
 
+#define DATADIR_NAME "2048"
+#define HIGHSCORE_FILE_NAME "highscore"
+
+const char* get_highscore_file();
+
 // Repeat an expression y, x times */
 #define ITER(x, expr)\
     do {\
@@ -38,7 +47,7 @@ typedef enum {
 
 /* Constants */
 #define DEFAULT_GRID_SIZE 4
-#define HISCORE_FILE ".hs2048g"
+#define HISCORE_FILE get_highscore_file()
 #define USAGE_STR\
    "Usage:\n"\
    "    ./2048 [options]\n"\
diff --git a/src/highscore_file.c b/src/highscore_file.c
new file mode 100644
index 0000000..baeab33
--- /dev/null
+++ b/src/highscore_file.c
@@ -0,0 +1,29 @@
+#include "2048.h"
+
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <string.h>
+#include <stdio.h>
+
+const char* get_highscore_file() {
+    static char buffer[4096];
+    if (getenv("XDG_DATA_HOME") != NULL) {
+        snprintf(buffer, sizeof(buffer), "%s/%s/%s", getenv("XDG_DATA_HOME"), DATADIR_NAME, HIGHSCORE_FILE_NAME);
+    } else if (getenv("HOME") != NULL) {
+        snprintf(buffer, sizeof(buffer), "%s/.local/share/%s/%s", getenv("HOME"), DATADIR_NAME, HIGHSCORE_FILE_NAME);
+    } else {
+        return HIGHSCORE_FILE_NAME;
+    }
+
+    // create hierarrchy of directories up to highscore file location
+    char* sep = strrchr(buffer, '/');
+    while (sep != NULL) {
+        *sep = '\0';
+        if (strlen(buffer) != 0)
+            mkdir(buffer, 0777);
+        char* tmpsep = sep;
+        sep = strrchr(buffer, '/');
+        *tmpsep = '/';
+    }
+    return buffer;
+}