From e1c5955c23f7be7cb7c6ab6fc3d2a0046c1c36a6 Mon Sep 17 00:00:00 2001
From: tomsmeding <tom.smeding@gmail.com>
Date: Wed, 7 Feb 2018 21:16:03 +0100
Subject: Improvements

---
 Makefile  |   5 +++
 README.md |   3 ++
 main.c    | 109 +++++++++++++++++++++++++++++++++++++-------------------------
 termio    |   2 +-
 4 files changed, 75 insertions(+), 44 deletions(-)
 create mode 100644 README.md

diff --git a/Makefile b/Makefile
index 1899fcf..4db1f12 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,9 @@
+.PHONY: all clean
+
 all: tetris
 
+clean:
+	rm -f tetris
+
 tetris: $(wildcard *.c *.h)
 	gcc -Wall -Wextra -std=c11 -O2 -fwrapv -o $@ $(filter %.c,$^) -Itermio termio/libtermio.a
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..0f99230
--- /dev/null
+++ b/README.md
@@ -0,0 +1,3 @@
+Clone using `git clone --recurse-submodules`.
+
+Arrow keys or WASD to move; Q to quit.
diff --git a/main.c b/main.c
index d1c5138..d9f7984 100644
--- a/main.c
+++ b/main.c
@@ -12,6 +12,8 @@
 #define WID 10
 #define HEI 22
 
+#define USE_UNICODE
+
 
 int delay_msec=700;
 
@@ -36,19 +38,26 @@ static int rotateR(int bl){
 	return dest;
 }
 
-static int rotateL(int bl){
-	return rotateR(rotateR(rotateR(bl)));
-}
-
 
 struct board {
 	int lines[HEI];
 	int stone,stx,sty;
 };
 
+static bool boardvalid(const struct board *bd){
+	for(int y=0;y<4;y++){
+		for(int x=0;x<4;x++){
+			if((bd->stone&(1<<(4*y+x)))){
+				if(bd->sty+y>=HEI)return false;
+				if(bd->stx+x<0||bd->stx+x>=WID)return false;
+			}
+			if(bd->lines[bd->sty+y]&((!!(bd->stone&(1<<(4*y+x))))<<(bd->stx+x)))return false;
+		}
+	}
+	return true;
+}
+
 static void persist(struct board *bd){
-	// fprintf(stderr,"persist: stone=%d\n",bd->stone);
-	// usleep(1000000);
 	for(int y=0;y<4;y++){
 		for(int x=0;x<4;x++){
 			bd->lines[bd->sty+y]|=(!!(bd->stone&(1<<(4*y+x))))<<(bd->stx+x);
@@ -56,72 +65,83 @@ static void persist(struct board *bd){
 	}
 }
 
-static void spawn(struct board *bd){
+// returns false iff game over
+static bool spawn(struct board *bd){
 	int idx=rand()%7;
-	// fprintf(stderr,"%d\n",idx);
-	// usleep(1000000);
 	bd->stone=stones[idx];
 	bd->stx=WID/2-1;
 	bd->sty=0;
+	return boardvalid(bd);
 }
 
 static void show(const struct board *bd){
 	struct board bd2;
 	memcpy(&bd2,bd,sizeof bd2);
 	persist(&bd2);
-	printf("\x1B[H\x1B[2J");
+	clearscreen();
 	for(int y=0;y<HEI;y++){
-		putchar('|');
+		moveto(0,y);
+		tputc('|');
 		for(int x=0;x<WID;x++){
-			if(bd2.lines[y]&(1<<x))printf("█");
-			else putchar(' ');
+#ifdef USE_UNICODE
+			if(x%2==1){
+				if(bd2.lines[y]&(1<<(x-1))){
+					if(bd2.lines[y]&(1<<x))tprintf("█");
+					else tprintf("▌");
+				} else {
+					if(bd2.lines[y]&(1<<x))tprintf("▐");
+					else tputc(' ');
+				}
+			}
+			if(bd2.lines[y]&(1<<x))tprintf("█");
+			else tputc(' ');
+#else
+			if(bd2.lines[y]&(1<<x))tputc('#');
+			else tputc(' ');
+#endif
 		}
-		putchar('|');
-		putchar('\n');
+		tputc('|');
 	}
-	putchar('+');
-	for(int x=0;x<WID;x++){
-		putchar('-');
-	}
-	putchar('+');
-	putchar('\n');
-	fflush(stdout);
+	moveto(0,HEI);
+	tputc('+');
+#ifdef USE_UNICODE
+	assert(WID%2==0);
+	for(int x=0;x<WID*3/2;x++)tputc('-');
+#else
+	for(int x=0;x<WID;x++)tputc('-');
+#endif
+	tputc('+');
+	redraw();
 }
 
-static bool boardvalid(const struct board *bd){
-	for(int y=0;y<4;y++){
-		for(int x=0;x<4;x++){
-			if((bd->stone&(1<<(4*y+x)))){
-				if(bd->sty+y>=HEI)return false;
-				if(bd->stx+x<0||bd->stx+x>=WID)return false;
-			}
-			if(bd->lines[bd->sty+y]&((!!(bd->stone&(1<<(4*y+x))))<<(bd->stx+x)))return false;
+static void checklines(struct board *bd){
+	for(int y=HEI-1;y>=0;y--){
+		if(bd->lines[y]==(1<<WID)-1){
+			memmove(bd->lines+1,bd->lines,y*sizeof(int));
+			bd->lines[0]=0;
+			y++;
 		}
 	}
-	return true;
 }
 
-static void advance(struct board *bd){
-	fprintf(stderr,"advance: stone=%d\n",bd->stone);
+// returns false iff game over
+static bool advance(struct board *bd){
 	if(bd->stone==0){
-		spawn(bd);
-		return;
+		return spawn(bd);
 	}
 	bd->sty++;
 	if(!boardvalid(bd)){
 		bd->sty--;
 		persist(bd);
-		spawn(bd);
-		return;
+		checklines(bd);
+		return spawn(bd);
 	}
+	return true;
 }
 
 static void move(struct board *bd,int dir){
 	bd->stx+=dir;
-	if(!boardvalid(bd)){
-		bd->stx-=dir;
-		return;
-	}
+	if(!boardvalid(bd))bd->stx-=dir;
 }
 
 static void rotR(struct board *bd){
@@ -136,6 +156,9 @@ int main(void){
 
 	initkeyboard(false);
 	atexit(endkeyboard);
+	initscreen();
+	atexit(endscreen);
+	installCLhandler(true);
 
 	struct board bd;
 	memset(&bd,0,sizeof bd);
@@ -164,7 +187,7 @@ int main(void){
 		gettimeofday(&end,NULL);
 
 		if(ret==0){
-			advance(&bd);
+			if(!advance(&bd))break;
 			timeleft.tv_sec=delay_msec/1000;
 			timeleft.tv_usec=delay_msec%1000*1000;
 			continue;
@@ -192,7 +215,7 @@ int main(void){
 		int key=tgetkey();
 		if(key=='Q'||key=='q')break;
 		else if(key=='S'||key=='s'||key==KEY_DOWN){
-			advance(&bd);
+			if(!advance(&bd))break;
 			timeleft.tv_sec=delay_msec/1000;
 			timeleft.tv_usec=delay_msec%1000*1000;
 		} else if(key=='A'||key=='a'||key==KEY_LEFT)move(&bd,-1);
diff --git a/termio b/termio
index 27b2fed..e3cb19c 160000
--- a/termio
+++ b/termio
@@ -1 +1 @@
-Subproject commit 27b2fed1846cebde87565abb65c0bde207d15d6b
+Subproject commit e3cb19cb87aaf5172d1090b2c6379e56429d932f
-- 
cgit v1.2.3-54-g00ecf