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API Version parsing & rendering

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This commit is contained in:
Robin Voetter
2020-06-30 16:48:58 +02:00
parent 9bda7d3357
commit c6054d2665
6 changed files with 174 additions and 57 deletions
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90
generator/registry/c-parse.zig
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@@ -24,6 +24,7 @@ pub const Token = struct {
minus,
tilde,
dot,
hash,
lparen,
rparen,
lbracket,
@@ -38,6 +39,7 @@ pub const Token = struct {
pub const CTokenizer = struct {
source: []const u8,
offset: usize = 0,
in_comment: bool = false,
fn peek(self: CTokenizer) ?u8 {
return if (self.offset < self.source.len) self.source[self.offset] else null;
@@ -88,7 +90,6 @@ pub const CTokenizer = struct {
const start = self.offset;
_ = self.consumeNoEof();
// TODO: 123ABC is now legal
while (true) {
const c = self.peek() orelse break;
switch (c) {
@@ -103,15 +104,29 @@ pub const CTokenizer = struct {
};
}
pub fn next(self: *CTokenizer) !?Token {
fn skipws(self: *CTokenizer) void {
while (true) {
switch (self.peek() orelse return null) {
switch (self.peek() orelse break) {
' ', '\t', '\n', '\r' => _ = self.consumeNoEof(),
else => break,
}
}
}
const c = self.peek().?;
pub fn next(self: *CTokenizer) !?Token {
self.skipws();
if (mem.startsWith(u8, self.source[self.offset ..], "//") or self.in_comment) {
const end = mem.indexOfScalarPos(u8, self.source, self.offset, '\n') orelse {
self.offset = self.source.len;
self.in_comment = true;
return null;
};
self.in_comment = false;
self.offset = end + 1;
}
self.skipws();
const c = self.peek() orelse return null;
var id: Token.Id = undefined;
switch (c) {
'A'...'Z', 'a'...'z', '_' => return self.keyword(),
@@ -123,6 +138,7 @@ pub const CTokenizer = struct {
'-' => id = .minus,
'~' => id = .tilde,
'.' => id = .dot,
'#' => id = .hash,
'[' => id = .lbracket,
']' => id = .rbracket,
'(' => id = .lparen,
@@ -176,20 +192,23 @@ pub const XmlCTokenizer = struct {
return token;
}
var in_comment: bool = false;
while (true) {
if (self.ctok) |*ctok| {
if (try ctok.next()) |tok| {
return tok;
}
in_comment = ctok.in_comment;
}
self.ctok = null;
if (self.it.next()) |child| {
switch (child.*) {
.CharData => |cdata| self.ctok = CTokenizer{.source = cdata},
.Comment => {},
.Element => |elem| if (try elemToToken(elem)) |tok| return tok,
.CharData => |cdata| self.ctok = CTokenizer{.source = cdata, .in_comment = in_comment},
.Comment => {}, // xml comment
.Element => |elem| if (!in_comment) if (try elemToToken(elem)) |tok| return tok,
}
} else {
return null;
@@ -198,7 +217,7 @@ pub const XmlCTokenizer = struct {
}
fn nextNoEof(self: *XmlCTokenizer) !Token {
return (try self.next()) orelse return error.InvalidSyntax;
return (try self.next()) orelse return error.UnexpectedEof;
}
fn peek(self: *XmlCTokenizer) !?Token {
@@ -211,7 +230,7 @@ pub const XmlCTokenizer = struct {
}
fn peekNoEof(self: *XmlCTokenizer) !Token {
return (try self.peek()) orelse return error.InvalidSyntax;
return (try self.peek()) orelse return error.UnexpectedEof;
}
fn expect(self: *XmlCTokenizer, id: Token.Id) !Token {
@@ -491,6 +510,36 @@ fn parseArrayDeclarator(xctok: *XmlCTokenizer) !?ArraySize {
return size;
}
pub fn parseVersion(xctok: *XmlCTokenizer) ![3][]const u8 {
_ = try xctok.expect(.hash);
const define = try xctok.expect(.id);
if (!mem.eql(u8, define.text, "define")) {
return error.InvalidVersion;
}
const name = try xctok.expect(.name);
const vk_make_version = try xctok.expect(.type_name);
if (!mem.eql(u8, vk_make_version.text, "VK_MAKE_VERSION")) {
return error.NotVersion;
}
_ = try xctok.expect(.lparen);
var version: [3][]const u8 = undefined;
for (version) |*part, i| {
if (i != 0) {
_ = try xctok.expect(.comma);
}
const tok = try xctok.nextNoEof();
switch (tok.id) {
.id, .int => part.* = tok.text,
else => return error.UnexpectedToken,
}
}
_ = try xctok.expect(.rparen);
return version;
}
fn testTokenizer(tokenizer: var, expected_tokens: []const Token) void {
for (expected_tokens) |expected| {
const tok = (tokenizer.next() catch unreachable).?;
@@ -503,7 +552,7 @@ fn testTokenizer(tokenizer: var, expected_tokens: []const Token) void {
test "CTokenizer" {
var ctok = CTokenizer {
.source = "typedef ([const)]** VKAPI_PTR 123,;aaaa"
.source = \\typedef ([const)]** VKAPI_PTR 123,;aaaa
};
testTokenizer(
@@ -529,7 +578,9 @@ test "CTokenizer" {
test "XmlCTokenizer" {
const document = try xml.parse(
testing.allocator,
"<root>typedef void (VKAPI_PTR *<name>PFN_vkVoidFunction</name>)(void);</root>"
\\<root>// comment <name>commented name</name> <type>commented type</type> trailing
\\ typedef void (VKAPI_PTR *<name>PFN_vkVoidFunction</name>)(void);
\\</root>
);
defer document.deinit();
@@ -556,7 +607,11 @@ test "XmlCTokenizer" {
test "parseTypedef" {
const document = try xml.parse(
testing.allocator,
"<root>typedef const struct <type>Python</type>* pythons[4];</root>"
\\<root> // comment <name>commented name</name> trailing
\\ typedef const struct <type>Python</type>* pythons[4];
\\ // more comments
\\</root>
\\
);
defer document.deinit();
@@ -567,12 +622,9 @@ test "parseTypedef" {
const decl = try parseTypedef(&arena.allocator, &xctok);
testing.expectEqualSlices(u8, "pythons", decl.name);
testing.expectEqual(TypeInfo.array, decl.decl_type);
testing.expectEqual(ArraySize{.int = 4}, decl.decl_type.array.size);
const array_child = decl.decl_type.array.child.*;
testing.expectEqual(TypeInfo.pointer, array_child);
const ptr = array_child.pointer;
const array = decl.decl_type.typedef.array;
testing.expectEqual(ArraySize{.int = 4}, array.size);
const ptr = array.child.pointer;
testing.expectEqual(true, ptr.is_const);
testing.expectEqual(TypeInfo.alias, ptr.child.*);
testing.expectEqualSlices(u8, "Python", ptr.child.alias);
testing.expectEqualSlices(u8, "Python", ptr.child.name);
}