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Spec: Bitmasks

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This commit is contained in:
Robin Voetter
2020-01-15 01:01:29 +01:00
parent 2a2eeaf573
commit 1a736a98b1
1 changed files with 43 additions and 11 deletions
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54
generator/spec.zig
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@@ -7,6 +7,7 @@ const SegmentedList = std.SegmentedList;
const Spec = struct {
backing_allocator: *Allocator,
enums: std.StringHashMap(Enum),
bitmasks: std.StringHashMap(BitmaskBits),
fn deinit(self: Spec) void {
self.enums.deinit();
@@ -14,7 +15,7 @@ const Spec = struct {
fn dump(self: Spec) void {
{
std.debug.warn("enums:\n", .{});
std.debug.warn("Enums:\n", .{});
var it = self.enums.iterator();
while (it.next()) |e| {
const kind_text = if (e.value.kind == .Bitmask) " (bitmask)" else "";
@@ -25,7 +26,27 @@ const Spec = struct {
}
}
}
{
std.debug.warn("Bitmasks:\n", .{});
var it = self.bitmasks.iterator();
while (it.next()) |b| {
std.debug.warn(" {}", .{b.key});
switch (b.value) {
.None => std.debug.warn("\n", .{}),
.Enum => |bits| std.debug.warn(" [bits: {}]\n", .{bits}),
.Alias => |alias| std.debug.warn(" [alias of: {}]\n", .{alias})
}
}
}
}
};
const BitmaskBits = union(enum) {
None,
Enum: []const u8,
Alias: []const u8
};
const Enum = struct {
@@ -159,11 +180,13 @@ pub fn generate(backing_allocator: *Allocator, registry: xml.Document) Spec {
var spec = Spec{
.backing_allocator = backing_allocator,
.enums = std.StringHashMap(Enum).init(backing_allocator)
.enums = std.StringHashMap(Enum).init(backing_allocator),
.bitmasks = std.StringHashMap(BitmaskBits).init(backing_allocator)
};
errdefer spec.deinit();
processTypes(&spec, registry);
processEnums(&spec, registry);
processFeatures(&spec, registry);
processExtensions(&spec, registry);
@@ -171,14 +194,26 @@ pub fn generate(backing_allocator: *Allocator, registry: xml.Document) Spec {
return spec;
}
fn readChildTextOrFail(element: *xml.Element, child_name: []const u8) ![]const u8 {
const child = element.findChildByTag(child_name).?;
const content = child.children.at(0).*;
if (content != .CharData) {
return error.InvalidRegistry;
fn processTypes(spec: *Spec, registry: xml.Document) void {
var types = registry.root.findChildByTag("types").?;
var it = types.findChildrenByTag("type");
while (it.next()) |ty| {
const category = ty.getAttribute("category") orelse continue;
if (mem.eql(u8, category, "bitmask")) {
processBitmaskType(spec, ty);
}
}
}
return content.CharData;
fn processBitmaskType(spec: *Spec, ty: *xml.Element) void {
if (ty.getAttribute("name")) |name| {
const alias = ty.getAttribute("alias").?;
if (spec.bitmasks.put(name, .{.Alias = alias}) catch unreachable) |_| unreachable;
} else {
const name = ty.findChildByTag("name").?.children.at(0).CharData;
const bits: BitmaskBits = if (ty.getAttribute("requires")) |bits_name| .{.Enum = bits_name} else .None;
if (spec.bitmasks.put(name, bits) catch unreachable) |_| unreachable;
}
}
fn processEnums(spec: *Spec, registry: xml.Document) void {
@@ -210,7 +245,6 @@ fn processExtension(spec: *Spec, ext: *xml.Element, req: *xml.Element) void {
var it = req.findChildrenByTag("enum");
while (it.next()) |field| {
const enum_name = field.getAttribute("extends") orelse continue;
if (Enum.isBackwardsCompatAlias(field)) continue;
// Some extensions define fields for other extensions,
// these are also defined in those extensions, so just skip them
@@ -228,8 +262,6 @@ fn processFeatures(spec: *Spec, registry: xml.Document) void {
var enum_it = req.findChildrenByTag("enum");
while (enum_it.next()) |field| {
const enum_name = field.getAttribute("extends") orelse continue;
if (Enum.isBackwardsCompatAlias(field)) continue;
const kv = spec.enums.get(enum_name).?;
kv.value.processFieldFromXml(field, null);
}