shithub: pplay

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misc debug checks, slightly better error messages

--- a/cmd.c

+++ b/cmd.c

@@ -142,6 +142,8 @@

 void

 setrange(usize from, usize to)

 {

+	assert((from & 3) == 0);

+	assert((to & 3) == 0);

 	dot.from.pos = from;

 	dot.to.pos = to;

 	if(dot.pos < from || dot.pos >= to)

@@ -151,6 +153,7 @@

 int

 setpos(usize off)

 {

+	assert((off & 3) == 0);

 	setrange(0, totalsz);

 	assert(off >= dot.from.pos && off < dot.to.pos);

 	dot.pos = off;

@@ -556,7 +559,7 @@

 	fd = (intptr)efd;

 	if((c = readintochunks(fd)) == nil)

-		threadexits("readintochunks: %r");

+		threadexits("failed reading from pipe: %r");

 	close(fd);

 	paste(nil, c);

 	assertsize();

@@ -574,7 +577,7 @@

 		sysfatal("procrfork: %r");

 	close(epfd[0]);

 	if(wr && procrfork(wproc, (int*)dup(epfd[1], -1), mainstacksize, RFFDG) < 0){

-		fprint(2, "threadcreate: %r\n");

+		fprint(2, "procrfork: %r\n");

 		return -1;

 	}

 	if(rr && threadcreate(rthread, (int*)dup(epfd[1], -1), mainstacksize) < 0){

--- a/draw.c

+++ b/draw.c

@@ -260,7 +260,7 @@

 	update();

 }

-void

+static void

 setcur(usize off)

 {

 	if(off < dot.from.pos || off > dot.to.pos - Outsz)