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Add general support for bit_fields

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gingerBill
2024-02-22 17:24:42 +00:00
parent a4b8c1ea17
commit 5a84a08225
12 changed files with 245 additions and 17 deletions
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34
src/types.cpp
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@@ -287,6 +287,7 @@ struct TypeProc {
Type * backing_type; \
Slice<Entity *> fields; \
Slice<u8> bit_sizes; \
Slice<i64> bit_offsets; \
Ast * node; \
}) \
TYPE_KIND(SoaPointer, struct { Type *elem; })
@@ -408,6 +409,7 @@ struct Selection {
bool indirect; // Set if there was a pointer deref anywhere down the line
u8 swizzle_count; // maximum components = 4
u8 swizzle_indices; // 2 bits per component, representing which swizzle index
bool is_bit_field;
bool pseudo_field;
};
gb_global Selection const empty_selection = {0};
@@ -3187,6 +3189,21 @@ gb_internal Selection lookup_field_with_selection(Type *type_, String field_name
else if (field_name == "a") mapped_field_name = str_lit("w");
return lookup_field_with_selection(type, mapped_field_name, is_type, sel, allow_blank_ident);
}
} else if (type->kind == Type_BitField) {
for_array(i, type->BitField.fields) {
Entity *f = type->BitField.fields[i];
if (f->kind != Entity_Variable || (f->flags & EntityFlag_Field) == 0) {
continue;
}
String str = f->token.string;
if (field_name == str) {
selection_add_index(&sel, i); // HACK(bill): Leaky memory
sel.entity = f;
sel.is_bit_field = true;
return sel;
}
}
} else if (type->kind == Type_Basic) {
switch (type->Basic.kind) {
case Basic_any: {
@@ -4551,6 +4568,23 @@ gb_internal gbString write_type_to_string(gbString str, Type *type, bool shortha
str = gb_string_appendc(str, gb_bprintf("matrix[%d, %d]", cast(int)type->Matrix.row_count, cast(int)type->Matrix.column_count));
str = write_type_to_string(str, type->Matrix.elem);
break;
case Type_BitField:
str = gb_string_appendc(str, "bit_field ");
str = write_type_to_string(str, type->BitField.backing_type);
str = gb_string_appendc(str, " {");
for (isize i = 0; i < type->BitField.fields.count; i++) {
Entity *f = type->BitField.fields[i];
if (i > 0) {
str = gb_string_appendc(str, ", ");
}
str = gb_string_append_length(str, f->token.string.text, f->token.string.len);
str = gb_string_appendc(str, ": ");
str = write_type_to_string(str, f->type);
str = gb_string_append_fmt(str, " | %u", type->BitField.bit_sizes[i]);
}
str = gb_string_appendc(str, " }");
break;
}
return str;