sync with plan 9

src/cmd/rc/tree.c

@@ -7,108 +7,140 @@ tree *treenodes;
  * create and clear a new tree node, and add it
  * to the node list.
  */
-tree *newtree(void){
-	tree *t=new(tree);
-	t->iskw=0;
-	t->str=0;
-	t->child[0]=t->child[1]=t->child[2]=0;
-	t->next=treenodes;
-	treenodes=t;
+
+tree*
+newtree(void)
+{
+	tree *t = new(tree);
+	t->iskw = 0;
+	t->str = 0;
+	t->child[0] = t->child[1] = t->child[2] = 0;
+	t->next = treenodes;
+	treenodes = t;
 	return t;
 }
-void freenodes(void){
+
+void
+freenodes(void)
+{
 	tree *t, *u;
-	for(t=treenodes;t;t=u){
-		u=t->next;
-		if(t->str) efree(t->str);
+	for(t = treenodes;t;t = u){
+		u = t->next;
+		if(t->str)
+			efree(t->str);
 		efree((char *)t);
 	}
-	treenodes=0;
+	treenodes = 0;
 }
-tree *tree1(int type, tree *c0)
+
+tree*
+tree1(int type, tree *c0)
 {
 	return tree3(type, c0, (tree *)0, (tree *)0);
 }
-tree *tree2(int type, tree *c0, tree *c1)
+
+tree*
+tree2(int type, tree *c0, tree *c1)
 {
 	return tree3(type, c0, c1, (tree *)0);
 }
-tree *tree3(int type, tree *c0, tree *c1, tree *c2)
+
+tree*
+tree3(int type, tree *c0, tree *c1, tree *c2)
 {
 	tree *t;
 	if(type==';'){
-		if(c0==0) return c1;
-		if(c1==0) return c0;
+		if(c0==0)
+			return c1;
+		if(c1==0)
+			return c0;
 	}
-	t=newtree();
-	t->type=type;
-	t->child[0]=c0;
-	t->child[1]=c1;
-	t->child[2]=c2;
+	t = newtree();
+	t->type = type;
+	t->child[0] = c0;
+	t->child[1] = c1;
+	t->child[2] = c2;
 	return t;
 }
-tree *mung1(tree *t, tree *c0)
+
+tree*
+mung1(tree *t, tree *c0)
 {
-	t->child[0]=c0;
+	t->child[0] = c0;
 	return t;
 }
-tree *mung2(tree *t, tree *c0, tree *c1)
+
+tree*
+mung2(tree *t, tree *c0, tree *c1)
 {
-	t->child[0]=c0;
-	t->child[1]=c1;
+	t->child[0] = c0;
+	t->child[1] = c1;
 	return t;
 }
-tree *mung3(tree *t, tree *c0, tree *c1, tree *c2)
+
+tree*
+mung3(tree *t, tree *c0, tree *c1, tree *c2)
 {
-	t->child[0]=c0;
-	t->child[1]=c1;
-	t->child[2]=c2;
+	t->child[0] = c0;
+	t->child[1] = c1;
+	t->child[2] = c2;
 	return t;
 }
-tree *epimung(tree *comp, tree *epi)
+
+tree*
+epimung(tree *comp, tree *epi)
 {
 	tree *p;
-	if(epi==0) return comp;
-	for(p=epi;p->child[1];p=p->child[1]);
-	p->child[1]=comp;
+	if(epi==0)
+		return comp;
+	for(p = epi;p->child[1];p = p->child[1]);
+	p->child[1] = comp;
 	return epi;
 }
 /*
  * Add a SIMPLE node at the root of t and percolate all the redirections
  * up to the root.
  */
-tree *simplemung(tree *t)
+
+tree*
+simplemung(tree *t)
 {
 	tree *u;
 	struct io *s;
-	t=tree1(SIMPLE, t);
-	s=openstr();
+	t = tree1(SIMPLE, t);
+	s = openstr();
 	pfmt(s, "%t", t);
-	t->str=strdup(s->strp);
+	t->str = strdup(s->strp);
 	closeio(s);
-	for(u=t->child[0];u->type==ARGLIST;u=u->child[0]){
+	for(u = t->child[0];u->type==ARGLIST;u = u->child[0]){
 		if(u->child[1]->type==DUP
 		|| u->child[1]->type==REDIR){
-			u->child[1]->child[1]=t;
-			t=u->child[1];
-			u->child[1]=0;
+			u->child[1]->child[1] = t;
+			t = u->child[1];
+			u->child[1] = 0;
 		}
 	}
 	return t;
 }
-tree *token(char *str, int type)
+
+tree*
+token(char *str, int type)
 {
-	tree *t=newtree();
-	t->type=type;
-	t->str=strdup(str);
+	tree *t = newtree();
+	t->type = type;
+	t->str = strdup(str);
 	return t;
 }
-void freetree(tree *p)
+
+void
+freetree(tree *p)
 {
-	if(p==0) return;	
+	if(p==0)
+		return;	
 	freetree(p->child[0]);
 	freetree(p->child[1]);
 	freetree(p->child[2]);
-	if(p->str) efree(p->str);
+	if(p->str)
+		efree(p->str);
 	efree((char *)p);
 }