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Feature level/promotion parsing

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This commit is contained in:
Robin Voetter
2020-06-12 03:47:01 +02:00
parent 52d1d45948
commit ff9dff6544
3 changed files with 56 additions and 8 deletions
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45
generator/registry/parse.zig
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@@ -463,7 +463,10 @@ fn parseFeatures(allocator: *Allocator, root: *xml.Element) ![]registry.Feature
fn parseFeature(allocator: *Allocator, feature: *xml.Element) !registry.Feature {
const name = feature.getAttribute("name") orelse return error.InvalidRegistry;
const number = feature.getAttribute("number") orelse return error.InvalidRegistry;
const feature_level = blk: {
const number = feature.getAttribute("number") orelse return error.InvalidRegistry;
break :blk try splitFeatureLevel(number, ".");
};
var requires = try allocator.alloc(registry.Require, feature.children.count());
var i: usize = 0;
@@ -475,7 +478,7 @@ fn parseFeature(allocator: *Allocator, feature: *xml.Element) !registry.Feature
return registry.Feature{
.name = name,
.number = number,
.level = feature_level,
.requires = allocator.shrink(requires, i)
};
}
@@ -566,11 +569,20 @@ fn parseRequire(allocator: *Allocator, require: *xml.Element, extnumber: ?u31) !
}
}
const required_feature_level = blk: {
const feature_level = require.getAttribute("feature") orelse break :blk null;
if (!mem.startsWith(u8, feature_level, "VK_VERSION_")) {
return error.InvalidRegistry;
}
break :blk try splitFeatureLevel(feature_level["VK_VERSION_".len ..], "_");
};
return registry.Require{
.extends = extends,
.types = types,
.commands = commands,
.required_feature = require.getAttribute("feature"),
.required_feature_level = required_feature_level,
.required_extension = require.getAttribute("extension"),
};
}
@@ -615,9 +627,19 @@ fn parseExtension(allocator: *Allocator, extension: *xml.Element) !?registry.Ext
const name = extension.getAttribute("name") orelse return error.InvalidRegistry;
const platform = extension.getAttribute("platform");
const promoted_to = extension.getAttribute("promotedto");
const version = try findExtVersion(extension);
const promoted_to: registry.Extension.Promotion = blk: {
const promotedto = extension.getAttribute("promotedto") orelse break :blk .none;
if (mem.startsWith(u8, promotedto, "VK_VERSION_")) {
const feature_level = try splitFeatureLevel(promotedto["VK_VERSION_".len ..], "_");
break :blk .{.feature = feature_level};
}
break :blk .{.extension = promotedto};
};
const number = blk: {
const number_str = extension.getAttribute("number") orelse return error.InvalidRegistry;
break :blk try std.fmt.parseInt(u31, number_str, 10);
@@ -658,3 +680,18 @@ fn parseExtension(allocator: *Allocator, extension: *xml.Element) !?registry.Ext
.requires = allocator.shrink(requires, i)
};
}
fn splitFeatureLevel(ver: []const u8, split: []const u8) !registry.FeatureLevel {
var it = mem.split(ver, split);
const major = it.next() orelse return error.InvalidFeatureLevel;
const minor = it.next() orelse return error.InvalidFeatureLevel;
if (it.next() != null) {
return error.InvalidFeatureLevel;
}
return registry.FeatureLevel{
.major = try std.fmt.parseInt(u32, major, 10),
.minor = try std.fmt.parseInt(u32, minor, 10),
};
}