From: Matthew Mondor <mmondor@pulsar-zone.net>
Date: Tue, 25 Apr 2023 17:26:10 +0000 (+0000)
Subject: Save/load high score to/from file.
X-Git-Url: http://git.pulsar-zone.net/?a=commitdiff_plain;h=4d4ac16b4fe7b2f62ba245599fd3021b8a6e5344;p=ninvaders.git

Save/load high score to/from file.
---

diff --git a/MATT-README.txt b/MATT-README.txt
index 7ef88be..81fdd24 100644
--- a/MATT-README.txt
+++ b/MATT-README.txt
@@ -18,18 +18,13 @@ BUG FIXES
 IMPROVEMENTS
 
 - Allow to build against BSD or other X/Open standard curses(3)
-
 - Use getopt(3) and atoi(3) instead of ad-hoc argument management
-
 - Make UFO missiles two animated rows to be closer to those in the
   original game.
-
 - Add a curses(3) atexit(3) cleanup handler.
-
 - Use stdlib EXIT_SUCCESS/EXIT_FAILURE.
-
 - Add high score keeping and display the scores on the title screen.
-
+- Load/save the high score from/to file.
 - Bandwidth efficiency improvent and addition of the -f option to
   lower the frame rate from the default (very high) 50, if necessary.
 
diff --git a/nInvaders.c b/nInvaders.c
index b2f4e0c..2534c84 100644
--- a/nInvaders.c
+++ b/nInvaders.c
@@ -34,6 +34,7 @@
 #include "ufo.h"
 
 #define DEFAULT_FPS 50
+#define HIGHSCORE_FILE ".nInvaders_highscore"
 
 int fps = DEFAULT_FPS;
 
@@ -52,6 +53,10 @@ int skill_level;
 #define GAME_HIGHSCORE 6
 
 
+static void highScoreInit(void);
+static void highScoreLoad(void);
+
+static char *highscorefullpath = NULL;
 
 
 /**
@@ -361,6 +366,8 @@ int main(int argc, char **argv)
 	skill_level = 1;
 
 	evaluateCommandLine(argc, argv);	// evaluate command line parameters
+	highScoreInit();
+	highScoreLoad();
 	graphicEngineInit();			// initialize graphic engine
 	
 	// set up timer/ game handling
@@ -391,3 +398,64 @@ void doScoring(int alienType)
 	drawscore();	// display score
 }
 
+
+#define HIGHSCOREFULLPATHBUFSIZ 256
+
+static void highScoreInit(void)
+{
+	char *home;
+
+	if (highscorefullpath != NULL)
+		return;
+
+	if ((highscorefullpath = malloc(HIGHSCOREFULLPATHBUFSIZ)) == NULL)
+		goto err;
+	if ((home = getenv("HOME")) == NULL)
+		goto err;
+	(void)snprintf(highscorefullpath, HIGHSCOREFULLPATHBUFSIZ - 1,
+	    "%s/%s", home, HIGHSCORE_FILE);
+	highscorefullpath[HIGHSCOREFULLPATHBUFSIZ - 1] = '\0';
+
+	return;
+err:
+	if (highscorefullpath != NULL) {
+		free(highscorefullpath);
+		highscorefullpath = NULL;
+	}
+}
+
+static void highScoreLoad(void)
+{
+	FILE *fh;
+	char line[64];
+
+	if (highscorefullpath == NULL)
+		return;
+
+	if ((fh = fopen(highscorefullpath, "r")) != NULL) {
+		if (fgets(line, 63, fh) != NULL) {
+			line[63] = '\0';
+			hiscore = atol(line);
+		}
+		if (fgets(line, 63, fh) != NULL) {
+			line[63] = '\0';
+			hilevel = atoi(line);
+		}
+		(void)fclose(fh);
+	}
+}
+
+/* XXX Should ideally save in a new unique file and rename for safety */
+void highScoreSave(void)
+{
+	FILE *fh;
+
+	if (highscorefullpath == NULL)
+		return;
+
+	if ((fh = fopen(highscorefullpath, "w")) != NULL) {
+		(void)fprintf(fh, "%ld\n", hiscore);
+		(void)fprintf(fh, "%d\n", hilevel);
+		(void)fclose(fh);
+	}
+}
diff --git a/nInvaders.h b/nInvaders.h
index 7400d98..30077b1 100644
--- a/nInvaders.h
+++ b/nInvaders.h
@@ -63,4 +63,6 @@ extern void showVersion(void);
 extern void showGplShort(void);
 extern void showGpl(void);
 
+void highScoreSave(void);
+
 #endif
diff --git a/view.c b/view.c
index d3add9e..84531c7 100644
--- a/view.c
+++ b/view.c
@@ -494,6 +494,7 @@ void titleScreenDisplay(void)
 		if (score > hiscore) {
 			hiscore = score;
 			hilevel = level;
+			highScoreSave();
 		}
 	}
 	if (hiscore != 0) {