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#include "fix-expr.hh"
#include "expr.hh"
ATermMap::ATermMap(unsigned int initialSize, unsigned int maxLoadPct)
{
table = ATtableCreate(initialSize, maxLoadPct);
if (!table) throw Error("cannot create ATerm table");
}
ATermMap::ATermMap(const ATermMap & map)
: table(0)
{
ATermList keys = map.keys();
/* !!! adjust allocation for load pct */
table = ATtableCreate(ATgetLength(keys), map.maxLoadPct);
if (!table) throw Error("cannot create ATerm table");
for (; !ATisEmpty(keys); keys = ATgetNext(keys)) {
ATerm key = ATgetFirst(keys);
set(key, map.get(key));
}
}
ATermMap::~ATermMap()
{
if (table) ATtableDestroy(table);
}
void ATermMap::set(ATerm key, ATerm value)
{
return ATtablePut(table, key, value);
}
void ATermMap::set(const string & key, ATerm value)
{
set(string2ATerm(key), value);
}
ATerm ATermMap::get(ATerm key) const
{
return ATtableGet(table, key);
}
ATerm ATermMap::get(const string & key) const
{
return get(string2ATerm(key));
}
void ATermMap::remove(ATerm key)
{
ATtableRemove(table, key);
}
void ATermMap::remove(const string & key)
{
remove(string2ATerm(key));
}
ATermList ATermMap::keys() const
{
ATermList keys = ATtableKeys(table);
if (!keys) throw Error("cannot query aterm map keys");
return keys;
}
ATerm string2ATerm(const string & s)
{
return (ATerm) ATmakeAppl0(ATmakeAFun((char *) s.c_str(), 0, ATtrue));
}
string aterm2String(ATerm t)
{
return ATgetName(ATgetAFun(t));
}
ATerm bottomupRewrite(TermFun & f, ATerm e)
{
if (ATgetType(e) == AT_APPL) {
AFun fun = ATgetAFun(e);
int arity = ATgetArity(fun);
ATermList args = ATempty;
for (int i = arity - 1; i >= 0; i--)
args = ATinsert(args, bottomupRewrite(f, ATgetArgument(e, i)));
e = (ATerm) ATmakeApplList(fun, args);
}
else if (ATgetType(e) == AT_LIST) {
ATermList in = (ATermList) e;
ATermList out = ATempty;
while (!ATisEmpty(in)) {
out = ATinsert(out, bottomupRewrite(f, ATgetFirst(in)));
in = ATgetNext(in);
}
e = (ATerm) ATreverse(out);
}
return f(e);
}
void queryAllAttrs(Expr e, ATermMap & attrs)
{
ATermList bnds;
if (!ATmatch(e, "Attrs([<list>])", &bnds))
throw badTerm("expected attribute set", e);
while (!ATisEmpty(bnds)) {
char * s;
Expr e;
if (!ATmatch(ATgetFirst(bnds), "Bind(<str>, <term>)", &s, &e))
abort(); /* can't happen */
attrs.set(s, e);
bnds = ATgetNext(bnds);
}
}
Expr queryAttr(Expr e, const string & name)
{
ATermMap attrs;
queryAllAttrs(e, attrs);
return attrs.get(name);
}
Expr makeAttrs(const ATermMap & attrs)
{
ATermList bnds = ATempty, keys = attrs.keys();
while (!ATisEmpty(keys)) {
Expr key = ATgetFirst(keys);
bnds = ATinsert(bnds,
ATmake("Bind(<term>, <term>)", key, attrs.get(key)));
keys = ATgetNext(keys);
}
return ATmake("Attrs(<term>)", ATreverse(bnds));
}
Expr substitute(const ATermMap & subs, Expr e)
{
char * s;
if (ATmatch(e, "Var(<str>)", &s)) {
Expr sub = subs.get(s);
return sub ? sub : e;
}
/* In case of a function, filter out all variables bound by this
function. */
ATermList formals;
ATerm body;
if (ATmatch(e, "Function([<list>], <term>)", &formals, &body)) {
ATermMap subs2(subs);
ATermList fs = formals;
while (!ATisEmpty(fs)) {
Expr def;
if (!ATmatch(ATgetFirst(fs), "NoDefFormal(<str>)", &s) &&
!ATmatch(ATgetFirst(fs), "DefFormal(<str>, <term>)", &s))
abort();
subs2.remove(s);
fs = ATgetNext(fs);
}
return ATmake("Function(<term>, <term>)", formals,
substitute(subs2, body));
}
/* Idem for a mutually recursive attribute set. */
ATermList bindings;
if (ATmatch(e, "Rec([<list>])", &bindings)) {
ATermMap subs2(subs);
ATermList bnds = bindings;
while (!ATisEmpty(bnds)) {
Expr e;
if (!ATmatch(ATgetFirst(bnds), "Bind(<str>, <term>)", &s, &e))
abort(); /* can't happen */
subs2.remove(s);
bnds = ATgetNext(bnds);
}
return ATmake("Rec(<term>)", substitute(subs2, (ATerm) bindings));
}
if (ATgetType(e) == AT_APPL) {
AFun fun = ATgetAFun(e);
int arity = ATgetArity(fun);
ATermList args = ATempty;
for (int i = arity - 1; i >= 0; i--)
args = ATinsert(args, substitute(subs, ATgetArgument(e, i)));
return (ATerm) ATmakeApplList(fun, args);
}
if (ATgetType(e) == AT_LIST) {
ATermList in = (ATermList) e;
ATermList out = ATempty;
while (!ATisEmpty(in)) {
out = ATinsert(out, substitute(subs, ATgetFirst(in)));
in = ATgetNext(in);
}
return (ATerm) ATreverse(out);
}
return e;
}
Expr makeBool(bool b)
{
return b ? ATmake("Bool(True)") : ATmake("Bool(False)");
}
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