266 lines
7.1 KiB
Python
266 lines
7.1 KiB
Python
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from parser import *
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HEADER_PRELUDE = """
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// Generated file - DO NOT MODIFY
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#pragma once
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#include <glacier/string/string.h>
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#include <ztypes.h>
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"""
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MESSAGE_CLASS_PREFIX = """
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class {name} {{
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public:
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{name}() {{}}
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// Delete copy and move until implemented.
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{name}(const {name}&) = delete;
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{name}({name}&&) = delete;
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void ParseFromBytes(const glcr::ByteBuffer&);
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void ParseFromBytes(const glcr::ByteBuffer&, const glcr::CapBuffer&);
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void SerializeToBytes(glcr::ByteBuffer&);
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void SerializeToBytes(glcr::ByteBuffer&, glcr::CapBuffer&);
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"""
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MESSAGE_CLASS_SET_GET = """
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{type} {name}() {{ return {name}_; }}
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void set_{name}({type} value) {{
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{name}_ = value;
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}}
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"""
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MESSAGE_CLASS_PRIVATE = """
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private:
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"""
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MESSAGE_CLASS_FIELD = """
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{type} {name}_;
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"""
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MESSAGE_CLASS_SUFFIX = """
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};
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"""
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type_to_str = {
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Type.U64: "uint64_t",
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Type.I64: "int64_t",
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Type.STRING: "glcr::String",
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Type.CAPABILITY: "z_cap_t",
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Type.BYTES: "glcr::Vector<uint8_t>"
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}
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def _type_str(field_type: Type) -> str:
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return type_to_str[field_type]
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def _generate_message_class(message: Message) -> str:
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class_decl = MESSAGE_CLASS_PREFIX.format(name = message.name)
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for field in message.fields:
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class_decl += MESSAGE_CLASS_SET_GET.format(name = field.name, type = _type_str(field.type))
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class_decl += MESSAGE_CLASS_PRIVATE
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for field in message.fields:
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class_decl += MESSAGE_CLASS_FIELD.format(name = field.name, type = _type_str(field.type))
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class_decl += MESSAGE_CLASS_SUFFIX
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return class_decl
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def generate_message_header(ast: list[Decl]) -> str:
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header = HEADER_PRELUDE
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for decl in ast:
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if type(decl) != Message:
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continue
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header += _generate_message_class(decl)
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return header
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IMPL_PRELUDE = """
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#include "{file}.h"
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namespace {{
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const uint64_t header_size = 24; // 4x uint32, 1x uint64
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struct ExtPointer {{
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uint32_t offset;
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uint32_t length;
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}}
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void CheckHeader(const glcr::ByteBuffer& bytes) {{
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// TODO: Check ident.
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// TODO: Parse core size.
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// TODO: Parse extension size.
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// TODO: Check CRC32
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// TODO: Parse options.
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}}
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void WriteHeader(glcr::ByteBuffer& bytes, uint32_t core_size, uint32_t extension_size) {{
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bytes.WriteAt<uint32_t>(0, 0xDEADBEEF); // TODO: Chose a more unique ident sequence.
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bytes.WriteAt<uint32_t>(4, core_size);
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bytes.WriteAt<uint32_t>(8, extension_size);
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bytes.WriteAt<uint32_t>(12, 0); // TODO: Calculate CRC32.
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bytes.WriteAt<uint64_t>(16, 0); // TODO: Add options.
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}}
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}} // namespace
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"""
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IMPL_PARSE_DEF = """
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void {name}::ParseFromBytes(const glcr::ByteBuffer& bytes) {{
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CheckHeader();
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"""
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IMPL_PARSE_DEF_CAP = """
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void {name}::ParseFromBytes(const glcr::ByteBuffer& bytes, const glcr::CapBuffer& caps) {{
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CheckHeader();
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"""
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IMPL_PARSE_U64 = """
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set_{name}(bytes.At<uint64_t>(header_size + (8 * {offset})));
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"""
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IMPL_PARSE_I64 = """
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set_{name}(bytes.At<int64_t>(header_size + (8 * {offset})));
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"""
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IMPL_PARSE_STRING = """
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auto {name}_pointer = bytes.At<ExtPointer>(header_size + (8 * {offset}));
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set_{name}(bytes.StringAt({name}_pointer.offset, {name}_pointer.length));
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"""
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IMPL_SET_CAP_EMPTY = """
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set_{name}(0);
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"""
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IMPL_PARSE_CAP = """
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uint64_t {name}_ptr = bytes.At<uint64_t>(header_size + (8 * {offset}));
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set_{name}(caps.at({name}_ptr));
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"""
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IMPL_PARSE_DEF_END = """
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}
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"""
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def _generate_message_parse_impl(message: Message) -> str:
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impl = ""
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for with_cap in (False, True):
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impl += IMPL_PARSE_DEF.format(name=message.name) if not with_cap else IMPL_PARSE_DEF_CAP.format(name=message.name)
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for offset, field in enumerate(message.fields):
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if field.type == Type.U64:
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impl += IMPL_PARSE_U64.format(name = field.name, offset = offset)
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elif field.type == Type.I64:
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impl += IMPL_PARSE_I64.format(name = field.name, offset = offset)
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elif field.type == Type.STRING:
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impl += IMPL_PARSE_STRING.format(name = field.name, offset = offset);
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elif field.type == Type.CAPABILITY:
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if with_cap:
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impl += IMPL_PARSE_CAP.format(name = field.name, offset = offset)
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else:
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impl += IMPL_SET_CAP_EMPTY.format(name = field.name)
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else:
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impl += "\n{} unimplemented\n".format(field.type.name)
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impl += IMPL_PARSE_DEF_END
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return impl
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IMPL_SER_DEF = """
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{name}::SerializeToBytes(glcr::ByteBuffer& bytes) {{
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uint32_t next_extension = header_size + 8 * {num_fields};
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const uint32_t core_size = next_extension;
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"""
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IMPL_SER_CAP_DEF = """
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{name}::SerializeToBytes(glcr::ByteBuffer& bytes, glcr::CapBuffer& caps) {{
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uint32_t next_extension = header_size + 8 * {num_fields};
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const uint32_t core_size = next_extension;
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uint64_t next_cap = 0;
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"""
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IMPL_SER_U64 = """
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bytes.WriteAt<uint64_t>(header_size + (8 * {offset}), {name}());
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"""
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IMPL_SER_I64 = """
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bytes.WriteAt<int64_t>(header_size + (8 * {offset}), {name}());
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"""
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IMPL_SER_STRING = """
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ExtPointer {name}_ptr{{
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.offset = next_extension,
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// FIXME: Check downcast of str length.
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.length = {name}().length(),
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}};
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bytes.WriteStringAt(next_extension, {name}());
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next_extension += {name}_ptr.length;
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bytes.WriteAt<ExtPointer>(header_size + (8 * {offset}), {name}_ptr);
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"""
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IMPL_SER_CAP_EMPTY = """
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// FIXME: Warn or error on serialization
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"""
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IMPL_SER_CAP = """
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caps.Write(next_cap, {name}());
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bytes.WriteAt<uint64_t>(header_size + (8 * {offset}), next_cap++);
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"""
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IMPL_SER_DEF_END = """
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// The next extension pointer is the length of the message.
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WriteHeader(bytes, core_size, next_extension);
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}
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"""
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def _generate_message_serialize_impl(message: Message) -> str:
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impl = ""
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for with_cap in (False, True):
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if with_cap:
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impl += IMPL_SER_CAP_DEF.format(name = message.name, num_fields = len(message.fields))
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else:
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impl += IMPL_SER_DEF.format(name = message.name, num_fields = len(message.fields))
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for offset, field in enumerate(message.fields):
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if field.type == Type.U64:
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impl += IMPL_SER_U64.format(name = field.name, offset = offset)
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elif field.type == Type.I64:
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impl += IMPL_SER_I64.format(name = field.name, offset = offset)
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elif field.type == Type.STRING:
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impl += IMPL_SER_STRING.format(name = field.name, offset = offset)
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elif field.type == Type.CAPABILITY:
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if with_cap:
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impl += IMPL_SER_CAP.format(name = field.name, offset = offset)
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else:
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impl += IMPL_SER_CAP_EMPTY
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else:
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impl += "\n{} unimplemented\n".format(field.type.name)
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impl += IMPL_SER_DEF_END
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return impl
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def _generate_message_class_impl(message: Message) -> str:
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return _generate_message_parse_impl(message) + _generate_message_serialize_impl(message)
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def generate_message_impl(file: str, ast: list[Decl]) -> str:
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impl = IMPL_PRELUDE.format(file=file)
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for decl in ast:
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if type(decl) != Message:
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continue
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impl += _generate_message_class_impl(decl)
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return impl
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