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import "cffc.hff";
import "util.hff";
import "common.hff";
import "set.hff";
struct TypeTraits {
fn hash(ty *const Type) u32 {
let h = FNV1A_INI;
h = fnv1a_i(h, as(int)ty.u.#tag);
h = fnv1a_i(h, ty.konst ? 1 : 0);
switch ty.u {
case Void; case Bool;
case Flo;
h = fnv1a_i(h, ty.size);
case Int i;
h = fnv1a_i(h, i.sgn ? 1 : 0);
h = fnv1a_i(h, ty.size);
case Ptr child;
h = fnv1a_i(h, child.id);
case Arr arr;
h = fnv1a_i(h, arr.child.id);
h = fnv1a_i(h, arr.length);
case Slice child;
h = fnv1a_i(h, child.id);
case Fn f;
h = fnv1a_i(h, f.ret.id);
foreach(p, _, f.params,
h = fnv1a_i(h, p.id);
)
case Agg agg;
h = fnv1a_i(h, agg.id);
}
return h;
}
fn eq(a *const Type, b *const Type) bool {
if a.u.#tag != b.u.#tag or a.size != b.size
or a.align != b.align or a.konst != b.konst {
return #f;
}
switch a.u {
case Void; case Bool; case Flo;
case Int i;
return i.sgn == b.u.Int.sgn;
case Ptr child;
return child == b.u.Ptr;
case Arr arr;
let brr = b.u.Arr;
return arr.length == brr.length and arr.child == brr.child;
case Slice child;
return child == b.u.Slice;
case Fn f0;
let f1 = b.u.Fn;
if f0.variadic != f1.variadic {
return #f;
}
if f0.ret != f1.ret {
return #f;
}
if f0.params.#len != f1.params.#len {
return #f;
}
foreach(p, i, f0.params,
if p != f1.params[i] {
return #f;
}
)
return #t;
case Agg agg;
let bgg = b.u.Agg;
return agg.id == bgg.id;
}
return #f;
}
fn dup(ty *const Type) *const Type {
let p *Type = xmalloc(sizeof Type);
static id int = 0;
*p = *ty;
p.id = id++;
return p;
}
}
extern fn interntype(ty0 Type) *const Type {
static set Set<*const Type, TypeTraits> = {};
if ty0.align == 0 {
ty0.align = ty0.size;
}
return *set->intern(&ty0);
}
extern fn completetype(ty *const Type) bool {
if ty.konst {
return completetype(unconstify(ty));
}
switch ty.u {
case Void; return #f;
case Fn; return #f;
case Arr a; return a.length >= 0;
}
return #t;
}
extern static ty_void *const Type = {},
ty_bool *const Type = {},
ty_i8 *const Type = {},
ty_u8 *const Type = {},
ty_i16 *const Type = {},
ty_u16 *const Type = {},
ty_i32 *const Type = {},
ty_u32 *const Type = {},
ty_int *const Type = {},
ty_uint *const Type = {},
ty_i64 *const Type = {},
ty_u64 *const Type = {},
ty_isize *const Type = {},
ty_usize *const Type = {},
ty_iptrint *const Type = {},
ty_uptrint *const Type = {},
ty_f32 *const Type = {},
ty_f64 *const Type = {},
ty_voidptr *const Type = {};
extern fn putprimtypes(env *Env) void {
let types []struct { name *const u8, gty **const Type, ty Type } = {
{ "void", &ty_void, { .size: 0, .align: 1, .u: :Void }},
{ "bool", &ty_bool, { .size: 1, .align: 1, .u: :Bool }},
{ "f32", &ty_f32, { .size: 4, .u: :Flo }},
{ "f64", &ty_f64, { .size: 8, g_targ.f64align, .u: :Flo }},
{ "i8", &ty_i8, { .size: 1, .u: :Int { .sgn: #t }}},
{ "u8", &ty_u8, { .size: 1, .u: :Int { .sgn: #f }}},
{ "i16", &ty_i16, { .size: 2, .u: :Int { .sgn: #t }}},
{ "u16", &ty_u16, { .size: 2, .u: :Int { .sgn: #f }}},
{ "i32", &ty_i32, { .size: 4, .u: :Int { .sgn: #t }}},
{ "u32", &ty_u32, { .size: 4, .u: :Int { .sgn: #f }}},
{ "int", &ty_int, { g_targ.intsize, .u: :Int { .sgn: #t }}},
{ "uint", &ty_uint, { g_targ.intsize, .u: :Int { .sgn: #f }}},
{ "isize", &ty_isize,{ g_targ.sizesize, .u: :Int { .sgn: #t }}},
{ "usize", &ty_usize,{ g_targ.sizesize, .u: :Int { .sgn: #f }}},
{ "i64", &ty_i64, { .size: 8, g_targ.i64align, .u: :Int { .sgn: #t }}},
{ "u64", &ty_u64, { .size: 8, g_targ.i64align, .u: :Int { .sgn: #f }}},
{ "iptrint",&ty_iptrint, { g_targ.ptrsize, .u: :Int { .sgn: #t }}},
{ "uptrint",&ty_uptrint, { g_targ.ptrsize, .u: :Int { .sgn: #f }}},
};
foreach(type, _, types[0::],
envput(env, { type.name, .u: :Ty(*type.gty = interntype(type.ty)) }, #null);
)
ty_voidptr = interntype({ .size: g_targ.ptrsize, .u: :Ptr(ty_void) });
}
extern fn isnumtype(ty *const Type) bool {
return ty->is(:Int) or ty->is(:Flo);
}
fn numtype2rank(ty *const Type) int {
ty = unconstify(ty);
switch {
case ty->is(:Int) and (ty == ty_int or ty.size < ty_int.size);
return 0;
case ty == ty_uint; return 1;
case ty == ty_i32; return 2;
case ty == ty_u32; return 3;
case ty == ty_i64; return 4;
case ty == ty_u64; return 5;
case ty == ty_f32; return 6;
case ty == ty_f64; return 7;
}
return -1;
}
fn rank2numtype(r int) *const Type {
static const types []**const Type = {
&ty_int, &ty_uint, &ty_i32, &ty_u32,
&ty_i64, &ty_u64, &ty_f32, &ty_f64,
};
assert(r >= 0 and r < types.#len, "rank");
return *types[r];
}
extern fn typeof2(a *const Type, b *const Type) *const Type {
if a == b and !a->is(:Int) {
return a;
}
if isnumtype(a) and isnumtype(b) {
let ra = numtype2rank(a),
rb = numtype2rank(b);
return rank2numtype(MAX(ra, rb));
}
if unconstify(a) == b {
return a;
}
if a == unconstify(b) {
return b;
}
return #null;
}
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