Replace crude Makefile with Autotools build system

4 files changed, 1043 insertions, 0 deletions

diff --git a/src/Makefile.am b/src/Makefile.am
new file mode 100644
index 0000000..eef8b12
--- /dev/null
+++ b/src/Makefile.am
@@ -0,0 +1,3 @@
+bin_PROGRAMS = simple_snake
+simple_snake_SOURCES = body.c draw.c body.h
+simple_snake_LDADD = -lncurses -lm
diff --git a/src/Makefile.in b/src/Makefile.in
new file mode 100644
index 0000000..223fedd
--- /dev/null
+++ b/src/Makefile.in
@@ -0,0 +1,574 @@
+# Makefile.in generated by automake 1.16.3 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994-2020 Free Software Foundation, Inc.
+
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+
+VPATH = @srcdir@
+am__is_gnu_make = { \
+  if test -z '$(MAKELEVEL)'; then \
+    false; \
+  elif test -n '$(MAKE_HOST)'; then \
+    true; \
+  elif test -n '$(MAKE_VERSION)' && test -n '$(CURDIR)'; then \
+    true; \
+  else \
+    false; \
+  fi; \
+}
+am__make_running_with_option = \
+  case $${target_option-} in \
+      ?) ;; \
+      *) echo "am__make_running_with_option: internal error: invalid" \
+              "target option '$${target_option-}' specified" >&2; \
+         exit 1;; \
+  esac; \
+  has_opt=no; \
+  sane_makeflags=$$MAKEFLAGS; \
+  if $(am__is_gnu_make); then \
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+      *\\[\ \	]*) \
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+          | sed "s/$$bs$$bs[$$bs $$bs	]*//g"`;; \
+    esac; \
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+  skip_next=no; \
+  strip_trailopt () \
+  { \
+    flg=`printf '%s\n' "$$flg" | sed "s/$$1.*$$//"`; \
+  }; \
+  for flg in $$sane_makeflags; do \
+    test $$skip_next = yes && { skip_next=no; continue; }; \
+    case $$flg in \
+      *=*|--*) continue;; \
+        -*I) strip_trailopt 'I'; skip_next=yes;; \
+      -*I?*) strip_trailopt 'I';; \
+        -*O) strip_trailopt 'O'; skip_next=yes;; \
+      -*O?*) strip_trailopt 'O';; \
+        -*l) strip_trailopt 'l'; skip_next=yes;; \
+      -*l?*) strip_trailopt 'l';; \
+      -[dEDm]) skip_next=yes;; \
+      -[JT]) skip_next=yes;; \
+    esac; \
+    case $$flg in \
+      *$$target_option*) has_opt=yes; break;; \
+    esac; \
+  done; \
+  test $$has_opt = yes
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+PRE_INSTALL = :
+POST_INSTALL = :
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+PRE_UNINSTALL = :
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+	      exit 1;; \
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+	  $(AUTOMAKE) --gnu src/Makefile
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+	if test -n "$$list"; then \
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+	  $(MKDIR_P) "$(DESTDIR)$(bindir)" || exit 1; \
+	fi; \
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+	      -e 's/$$/$(EXEEXT)/' \
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+
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+	$(AM_V_CCLD)$(LINK) $(simple_snake_OBJECTS) $(simple_snake_LDADD) $(LIBS)
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+	-rm -f ./$(DEPDIR)/draw.Po
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+install-info: install-info-am
+
+install-info-am:
+
+install-man:
+
+install-pdf: install-pdf-am
+
+install-pdf-am:
+
+install-ps: install-ps-am
+
+install-ps-am:
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-am
+		-rm -f ./$(DEPDIR)/body.Po
+	-rm -f ./$(DEPDIR)/draw.Po
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-am
+
+mostlyclean-am: mostlyclean-compile mostlyclean-generic
+
+pdf: pdf-am
+
+pdf-am:
+
+ps: ps-am
+
+ps-am:
+
+uninstall-am: uninstall-binPROGRAMS
+
+.MAKE: install-am install-strip
+
+.PHONY: CTAGS GTAGS TAGS all all-am am--depfiles check check-am clean \
+	clean-binPROGRAMS clean-generic cscopelist-am ctags ctags-am \
+	distclean distclean-compile distclean-generic distclean-tags \
+	distdir dvi dvi-am html html-am info info-am install \
+	install-am install-binPROGRAMS install-data install-data-am \
+	install-dvi install-dvi-am install-exec install-exec-am \
+	install-html install-html-am install-info install-info-am \
+	install-man install-pdf install-pdf-am install-ps \
+	install-ps-am install-strip installcheck installcheck-am \
+	installdirs maintainer-clean maintainer-clean-generic \
+	mostlyclean mostlyclean-compile mostlyclean-generic pdf pdf-am \
+	ps ps-am tags tags-am uninstall uninstall-am \
+	uninstall-binPROGRAMS
+
+.PRECIOUS: Makefile
+
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/body.c b/src/body.c
new file mode 100644
index 0000000..bfee083
--- /dev/null
+++ b/src/body.c
@@ -0,0 +1,189 @@
+#include <assert.h>
+#include <stdbool.h>
+#include <stdlib.h>
+
+#include "../include/body.h"
+
+typedef struct node{
+	int x;
+	int y;
+	struct node *next;
+} NODE;
+
+typedef struct snake{
+	NODE *head; //"head" will be the physical tail of the snake
+	NODE *tail; //"tail" will be the physical head of the snake
+	int length;
+} SNAKE;
+
+//private prototypes
+NODE *makeNode(int x, int y);
+void deleteNode(NODE *np);
+void increaseSnake(SNAKE *sp);
+
+//public functions
+SNAKE *makeSnake(int startx, int starty, int len){
+	SNAKE *new = malloc(sizeof(SNAKE));
+	NODE *np;
+
+	assert(new != NULL);
+
+	new->length = len;
+
+	new->head = makeNode(startx-len+1, starty);
+	np = new->head;
+	len--;
+
+	while(len > 0){
+		np->next = makeNode(startx-len+1, starty);
+		np = np->next;
+		len--;
+	}
+
+	new->tail = np;
+
+	return new;
+}
+
+void deleteSnake(SNAKE *sp){
+	NODE *hold;
+
+	if(sp != NULL){
+		while(sp->head != NULL){
+			hold = sp->head;
+			sp->head = sp->head->next;
+			deleteNode(hold);
+		}
+	}
+
+	free(sp);
+	return;
+}
+
+void updateSnake(SNAKE *sp, int dir, int maxx, int maxy, bool *collision, int *fruit_loc, bool *fruit, int *score){
+	NODE *np;
+
+	if(sp == NULL) return;
+
+	//move the "back" to the "front" (note that sp->tail will not be set until after np->x and np->y are set)
+	np = sp->head;
+	sp->head = sp->head->next;
+	sp->tail->next = np;
+	np->next = NULL;
+
+	//dir decides direction the snake is moving
+	switch(dir){
+		case(0): //snake is moving up
+			np->x = sp->tail->x;
+			np->y = sp->tail->y-1;
+			break;
+
+		case(1): //snake is moving right
+			np->x = sp->tail->x+1;
+			np->y = sp->tail->y;
+			break;
+
+		case(2): //snake is moving down
+			np->x = sp->tail->x;
+			np->y = sp->tail->y+1;
+			break;
+
+		case(3): //snake is moving left
+			np->x = sp->tail->x-1;
+			np->y = sp->tail->y;
+	}
+
+	//update tail pointer
+	sp->tail = np;
+
+	//check if eating fruit
+	if(*fruit && sp->tail->x == *fruit_loc && sp->tail->y == *(fruit_loc + 1)){
+		*fruit = false;
+		(*score)++;
+
+		//need to increase snake size
+		increaseSnake(sp);
+	}
+
+	//check collision
+	*collision = checkSnake(sp, maxx, maxy);
+
+	return;
+}
+
+//true = collision, false = no collision
+bool checkSnake(SNAKE *sp, int maxx, int maxy){
+	NODE *np;
+
+	if(sp == NULL) return true;
+
+	//check if oob
+	if(sp->tail->x < 0 || sp->tail->x >= maxx || sp->tail->y < 0 || sp->tail->y >= maxy) return true;
+
+	//check if collision with body (check each cell)
+	np = sp->head;
+	while(np != sp->tail && np != NULL){
+		if(sp->tail->x == np->x && sp->tail->y == np->y) return true;
+		np = np->next;
+	}
+
+	return false;
+}
+
+int getSnakeTailx(SNAKE *sp){
+
+	if(sp != NULL && sp->tail != NULL) return sp->tail->x;
+	return -1;
+
+}
+int getSnakeTaily(SNAKE *sp){
+
+	if(sp != NULL && sp->tail != NULL) return sp->tail->y;
+	return -1;
+
+}
+
+int getSnakeHeadx(SNAKE *sp){
+
+	if(sp != NULL && sp->head != NULL) return sp->head->x;
+	return -1;
+
+}
+
+int getSnakeHeady(SNAKE *sp){
+
+	if(sp != NULL && sp->head != NULL) return sp->head->y;
+	return -1;
+
+}
+			
+//private functions
+NODE *makeNode(int x, int y){
+	NODE *new = malloc(sizeof(NODE));
+	assert(new != NULL);
+
+	new->x = x;
+	new->y = y;
+	new->next = NULL;
+
+	return new;
+}
+
+void deleteNode(NODE *np){
+
+	if(np != NULL) free(np);
+
+	return;
+}
+
+void increaseSnake(SNAKE *sp){
+	int xdiff = sp->head->next->x - sp->head->x;
+	int ydiff = sp->head->next->y - sp->head->y;
+	NODE *new = makeNode(sp->head->x - xdiff, sp->head->y - ydiff);
+
+	new->next = sp->head;
+	sp->head = new;
+	sp->length++;
+
+	return;
+}
diff --git a/src/draw.c b/src/draw.c
new file mode 100644
index 0000000..4926f04
--- /dev/null
+++ b/src/draw.c
@@ -0,0 +1,277 @@
+#include <errno.h>
+#include <math.h>
+#include <ncurses.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <time.h>
+#include <unistd.h>
+
+#include "../include/body.h"
+
+#define START_SIZE 4
+//TODO consider having speed be affected by window size
+#define SPEED 50000 //global refresh rate (for usleep())
+#define TIMEOUT 1
+
+//#define DEBUG 1
+
+void updateScore(int which, int score);
+void updateScreen(SNAKE *sp, int dir, bool *collision, int *fruit_loc, bool *fruit, int *score);
+int loadScore(void);
+void saveScore(int highscore);
+
+#ifdef DEBUG
+void count_up(void);
+#endif
+
+int main(){
+	int score = 0;
+	int highscore;
+	int input;
+	int dir;
+	bool collision;
+	int fruit_loc[2]; //index 0 is x, 1 is y
+	bool fruit_bool;
+	bool new_hs_flag;
+	int i;
+
+	//TODO consider removing score2 altogether
+
+	srand(time(NULL));
+
+	initscr();
+	cbreak();
+	keypad(stdscr, true);
+	noecho();
+	curs_set(0);
+	set_escdelay(1);
+
+	while(input != 'q'){
+		clear();
+		
+		//reset variables
+		collision = false;
+		fruit_bool = false;
+		score = 0;
+		new_hs_flag = false;
+		highscore = loadScore();
+
+
+		//draw current score, and high score
+		updateScore(0, score);
+		updateScore(1, highscore);
+
+		//the snake will be initially drawn without calling to body.h
+		//functions in body.h will update the snake and check for collision
+		//updateScreen() will actually draw the snake on each update (and update the scoreboard)
+
+		//initialize and draw starting snake
+		SNAKE *player = makeSnake(START_SIZE+2, getmaxy(stdscr)/2, START_SIZE);
+		//TODO consider various choices for drawing the snake (the below sets reverse video and draws spaces)
+		attron(A_REVERSE);
+		mvaddch(getmaxy(stdscr)/2, START_SIZE+2, ':');
+		for(i = 1; START_SIZE-i > 0; i++){
+			mvaddch(getmaxy(stdscr)/2, START_SIZE+2-i, ' ');
+		}
+		attroff(A_REVERSE);
+
+		//TODO add something like "press any key to start!"
+		getch();
+
+		//turn timeout on and set the initial direction to "right"
+		timeout(TIMEOUT);
+		dir = 1;
+		while(!collision){
+			input = getch();
+			
+			//update dir based on received input (check that the input is valid as well)
+			switch(input){
+				case KEY_UP:
+					if(dir % 2) dir = 0;
+					break;
+				case KEY_RIGHT:
+					if(!(dir % 2)) dir = 1;
+					break;
+				case KEY_DOWN:
+					if(dir % 2) dir = 2;
+					break;
+				case KEY_LEFT:
+					if(!(dir % 2)) dir = 3;
+			}
+
+			updateScore(0, score);
+			if(score > highscore){
+				highscore = score;
+				new_hs_flag = true;
+			}
+			updateScore(1, highscore);
+			updateScreen(player, dir, &collision, fruit_loc, &fruit_bool, &score);
+			//TODO consider changing SPEED depending on if moving horizontally or vertically
+			refresh();
+			usleep(SPEED);
+		}
+
+		deleteSnake(player);
+		if(new_hs_flag) saveScore(highscore);
+
+		//turn timeout off (wait for input again)
+		timeout(-1);
+
+		//TODO add something like "game over"
+		while(input != 'q' && input != ' ' && input != 10) input = getch();
+
+		//DEBUG
+#ifdef DEBUG
+		//count_up();
+		getch();
+#endif
+	}
+
+	endwin();
+	return 0;
+}
+
+// 0 for p1 score, 1 for highscore, 2 for p2 score
+void updateScore(int which, int score){
+	char *title;
+	int start;
+
+	switch(which){
+		case 0: //p1 score
+			title = "Score";
+			start = 2;
+			break;
+
+		case 1: //high score
+			title = "Highscore";
+			start = getmaxx(stdscr)/2 - 5;
+			break;
+
+		default:
+			exit(1);
+	}
+
+	//draw the title and the score in the right location
+	mvprintw(0, start, "%s", title);
+	mvprintw(1, start + (which % 2 ? 5 : 3) - (!score ? 0 : (int)log10(score)), "%d", score);
+
+	return;
+}
+
+void updateScreen(SNAKE *sp, int dir, bool *collision, int *fruit_loc, bool *fruit, int *score){
+	char eyes;
+
+	//switch case to decide "eyes" char
+	switch(dir){
+		case 0:
+			eyes = '"';
+			break;
+		case 2:
+			eyes = '.';
+			break;
+		default:
+			eyes = ':';
+	}
+
+	//turn off "back"
+	mvaddch(getSnakeHeady(sp), getSnakeHeadx(sp), ' ');
+	//fix previous "front" (no more eyes)
+	attron(A_REVERSE);
+	mvaddch(getSnakeTaily(sp), getSnakeTailx(sp), ' ');
+	//update the snake position
+	updateSnake(sp, dir, getmaxx(stdscr), getmaxy(stdscr), collision, fruit_loc, fruit, score);
+	//turn on front
+	mvaddch(getSnakeTaily(sp), getSnakeTailx(sp), eyes);
+	attroff(A_REVERSE);
+
+	//TODO add logic to prevent fruit from spawning inside snake
+	//draw a new fruit, if necessary (do not draw it over scoreboard)
+	if(!(*fruit)){
+		*fruit_loc = rand() % getmaxx(stdscr);
+		*(fruit_loc+1) = rand() % (getmaxy(stdscr)-2) + 2;
+		attron(A_BOLD);
+		mvaddch(*(fruit_loc+1), *fruit_loc, '@');
+		attroff(A_BOLD);
+		*fruit = true;
+	}
+
+	return;
+}
+
+int loadScore(){
+	FILE *savedata;
+	char *path = malloc(sizeof(char) * 256);
+	int hs = 0;
+	char *home = getenv("HOME");
+
+	sprintf(path, "%s/.local/share/simple-snake/save.bin", home);
+	savedata = fopen(path, "rb");
+
+	if(savedata != NULL){
+		fread(&hs, sizeof(int), 1, savedata);
+		fclose(savedata);
+	}
+
+	free(path);
+	return hs;
+}
+
+void saveScore(int highscore){
+	FILE *savedata;
+	char *path = malloc(sizeof(char) * 256);
+	char *home = getenv("HOME");
+
+	sprintf(path, "%s/.local/share/simple-snake/save.bin", home);
+	savedata = fopen(path, "wb");
+
+	//if the file does not exist, create it
+	if(savedata == NULL){
+		if(home == NULL) return;
+
+		sprintf(path, "%s/.local/", home);
+		mkdir(path, 0700);
+
+		sprintf(path, "%s/.local/share/", home);
+		mkdir(path, 0755);
+
+		sprintf(path, "%s/.local/share/simple-snake/", home);
+		mkdir(path, 0755);
+
+		sprintf(path, "%s/.local/share/simple-snake/save.bin", home);
+		savedata = fopen(path, "wb");
+		if(savedata == NULL) return;
+	}
+
+	fwrite(&highscore, sizeof(int), 1, savedata);
+	fclose(savedata);
+
+	free(path);
+	return;
+}
+		
+
+//debug functions start here
+#ifdef DEBUG
+void count_up(){
+	int score = 0;
+	int score2 = 0;
+	int highscore = 0;
+
+	while(1){
+		score++;
+		score2++;
+		highscore++;
+		updateScore(0, score);
+		updateScore(1, highscore);
+		updateScore(2, score2);
+		refresh();
+		usleep(50000);
+	}
+
+	return;
+}
+#endif