static Tree expr2(void) {
Tree p = expr3(4);
if (t == '?') {
Tree l, r;
Coordinate pts[2];
if (Aflag > 1 && isfunc(p->type))
warning("%s used in a conditional expression\n", funcname(p));
p = pointer(p);
t = gettok();
pts[0] = src;
l = pointer(expr(':'));
pts[1] = src;
r = pointer(expr2());
if (events.points) {
apply(events.points, &pts[0], &l);
apply(events.points, &pts[1], &r);
}
p = condtree(p, l, r);
}
return p;
}
Tree value(Tree p) {
int op = generic(rightkid(p)->op);
if (p->type != voidtype
&& (op==AND || op==OR || op==NOT || op==EQ || op==NE || op== LE || op==LT || op== GE || op==GT))
p = condtree(p, consttree(1, inttype), consttree(0, inttype));
return p;
}
/* tracevalue - append format and argument to print the value of e */
static void tracevalue(Tree e, int lev) {
Type ty = unqual(e->type);
switch (ty->op) {
case INT:
if (ty == chartype || ty == signedchar)
appendstr("'\\x%02x'");
else if (ty == longtype)
appendstr("0x%ld");
else
appendstr("0x%d");
break;
case UNSIGNED:
if (ty == chartype || ty == unsignedchar)
appendstr("'\\x%02x'");
else if (ty == unsignedlong)
appendstr("0x%lx");
else
appendstr("0x%x");
break;
case FLOAT:
if (ty == longdouble)
appendstr("%Lg");
else
appendstr("%g");
break;
case POINTER:
if (unqual(ty->type) == chartype
|| unqual(ty->type) == signedchar
|| unqual(ty->type) == unsignedchar) {
static Symbol null;
if (null == NULL)
null = mkstr("(null)");
tracevalue(cast(e, unsignedtype), lev + 1);
appendstr(" \"%.30s\"");
e = condtree(e, e, pointer(idtree(null->u.c.loc)));
} else {
appendstr("("); appendstr(typestring(ty, "")); appendstr(")0x%x");
}
break;
case STRUCT: {
Field q;
appendstr("("); appendstr(typestring(ty, "")); appendstr("){");
for (q = ty->u.sym->u.s.flist; q; q = q->link) {
appendstr(q->name); appendstr("=");
tracevalue(field(addrof(e), q->name), lev + 1);
if (q->link)
appendstr(",");
}
appendstr("}");
return;
}
case UNION:
appendstr("("); appendstr(typestring(ty, "")); appendstr("){...}");
return;
case ARRAY:
if (lev && ty->type->size > 0) {
int i;
e = pointer(e);
appendstr("{");
for (i = 0; i < ty->size/ty->type->size; i++) {
Tree p = (*optree['+'])(ADD, e, consttree(i, inttype));
if (isptr(p->type) && isarray(p->type->type))
p = retype(p, p->type->type);
else
p = rvalue(p);
if (i)
appendstr(",");
tracevalue(p, lev + 1);
}
appendstr("}");
} else
appendstr(typestring(ty, ""));
return;
default:
assert(0);
}
e = cast(e, promote(ty));
args = tree(mkop(ARG,e->type), e->type, e, args);
}
