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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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src/check_type.cpp
+19 -2
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@@ -1035,11 +1035,19 @@ gb_internal void check_bit_field_type(CheckerContext *ctx, Type *bit_field_type,
error(f->bit_size, "A bit_field's specified bit size cannot exceed 64 bits, got %lld", cast(long long)bit_size_i64);
bit_size_i64 = 64;
}
i64 sz = 8*type_size_of(type);
if (bit_size_i64 > sz) {
error(f->bit_size, "A bit_field's specified bit size cannot exceed its type, got %lld, expect <=%lld", cast(long long)bit_size_i64, cast(long long)sz);
bit_size_i64 = sz;
}
bit_size_u8 = cast(u8)bit_size_i64;
Entity *e = alloc_entity_field(ctx->scope, f->name->Ident.token, type, false, field_src_index);
e->Variable.docs = docs;
e->Variable.comment = comment;
e->Variable.bit_field_bit_size = bit_size_u8;
e->flags |= EntityFlag_BitFieldField;
add_entity(ctx, ctx->scope, nullptr, e);
array_add(&fields, e);
@@ -1050,6 +1058,14 @@ gb_internal void check_bit_field_type(CheckerContext *ctx, Type *bit_field_type,
GB_ASSERT(fields.count <= bf->fields.count);
auto bit_offsets = slice_make<i64>(permanent_allocator(), fields.count);
i64 curr_offset = 0;
for_array(i, bit_sizes) {
bit_offsets[i] = curr_offset;
curr_offset += cast(i64)bit_sizes[i];
}
if (total_bit_size > maximum_bit_size) {
gbString s = type_to_string(backing_type);
error(node, "The numbers required %llu exceeds the backing type's (%s) bit size %llu",
@@ -1059,8 +1075,9 @@ gb_internal void check_bit_field_type(CheckerContext *ctx, Type *bit_field_type,
gb_string_free(s);
}
bit_field_type->BitField.fields = slice_from_array(fields);
bit_field_type->BitField.bit_sizes = slice_from_array(bit_sizes);
bit_field_type->BitField.fields = slice_from_array(fields);
bit_field_type->BitField.bit_sizes = slice_from_array(bit_sizes);
bit_field_type->BitField.bit_offsets = bit_offsets;
}
gb_internal bool is_type_valid_bit_set_range(Type *t) {