shithub: dporg

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fs: correct npal value

npal should refer to the number of palettes,
not the number of colors in the palette array

--- a/fs.c

+++ b/fs.c

@@ -182,6 +182,8 @@

 	bf = eopen("palettes.bin", OREAD);

 	npal = get32(bf) / 2;

+	if(npal % Npalcol != 0)

+		sysfatal("loadpal: invalid palette size %d\n", npal);

 	pal = emalloc(npal * sizeof *pal);

 	for(p=pal; p<pal+npal; p++){

 		n = get16(bf);

@@ -193,6 +195,7 @@

 		b = b << 3 | b >> 2;

 		*p = 0xff << 24 | r << 16 | g << 8 | b;

 	}

+	npal /= Npalcol;

 	Bterm(bf);

 }

@@ -324,8 +327,8 @@

 	snprint(name, sizeof name, "pal.bit");

 	if((fd = create(name, OWRITE, 0644)) < 0)

 		sysfatal("dumppal: %r");

-	fprint(fd, "%11s %11d %11d %11d %11d ", chantostr(c, ARGB32), 0, 0, 16, npal/16);

-	write(fd, pal, npal * sizeof *pal);

+	fprint(fd, "%11s %11d %11d %11d %11d ", chantostr(c, ARGB32), 0, 0, 16, npal);

+	write(fd, pal, npal * Npalcol * sizeof *pal);

 	close(fd);

 }

@@ -406,7 +409,7 @@

 	for(s=sprites; s<sprites+nsprites; s++){

 		ofs = get32(bf);

 		palofs = get32(bf);

-		if(palofs >= npal){

+		if(palofs % Npalcol != 0 || palofs / Npalcol >= npal){

 			werrstr("gencolorspr: invalid palette index %ud", palofs);

 			return -1;

 		}