shithub: gm4s

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add -b: set initial playfield state from string

--- a/fns.h

+++ b/fns.h

@@ -3,6 +3,7 @@

 void	drop(void);

 void	gameover(void);

 void	step(void);

+void	readboard(char*);

 void	initgame(void);

 void	redraw(void);

 void	quit(void);

--- a/game.c

+++ b/game.c

@@ -1,5 +1,6 @@

 #include <u.h>

 #include <libc.h>

+#include <ctype.h>

 #include "dat.h"

 #include "fns.h"

 #include "/sys/src/games/eui.h"

@@ -223,6 +224,42 @@

 	cur->flags &= ~Fhovering;

 	cur->lastmove = 0;

 	cur->y++;

+}

+

+void

+readboard(char *s)

+{

+	int i, n, b, *bp, max;

+	char c, *p;

+

+	max = nelem(playfield);

+	if((n = strlen(s)) > max){

+		fprint(2, "readboard: string longer than playfield\n");

+		n = Ncol * max;

+	}else if(n < 1)

+		sysfatal("readboard: empty string");

+	i = (n - 1) % Ncol;

+	bp = bfield + Nrow - n / Ncol;

+	if(bp == bfield + nelem(bfield))

+		bp--;

+	b = *bp;

+	for(p=playfield+max-n; p<playfield+nelem(playfield); i--){

+		c = *s++;

+		if(!isdigit(c)){

+			c = 0;

+			b &= ~(1 << i);

+		}else if((c -= '0') <= 0 || c >= NF){

+			c = 0;

+			b &= ~(1 << i);

+		}else

+			b |= 1 << i;

+		*p++ = c;

+		if(i == 0){

+			*bp++ = b;

+			b = 0;

+			i = Ncol;

+		}

+	}

 }

 void

--- a/gm4s.c

+++ b/gm4s.c

@@ -115,6 +115,12 @@

 	}

 }

+static void

+usage(void)

+{

+	sysfatal("usage: %s [-b STR]", argv0);

+}

+

 void

 threadmain(int argc, char **argv)

 {

@@ -121,6 +127,9 @@

 	ulong k;

 	ARGBEGIN{

+	case 'b':

+		readboard(EARGF(usage()));

+		break;

 	}ARGEND

 	if((stepc = chancreate(sizeof(ulong), 1)) == nil

 	|| (evc = chancreate(sizeof(ulong), 0)) == nil)

-- 

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