dawn-cmake/generator/templates/dawn_native/api_absl_format.cpp

133 lines
4.8 KiB
C++

//* Copyright 2021 The Dawn Authors
//*
//* Licensed under the Apache License, Version 2.0 (the "License");
//* you may not use this file except in compliance with the License.
//* You may obtain a copy of the License at
//*
//* http://www.apache.org/licenses/LICENSE-2.0
//*
//* Unless required by applicable law or agreed to in writing, software
//* distributed under the License is distributed on an "AS IS" BASIS,
//* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//* See the License for the specific language governing permissions and
//* limitations under the License.
{% set impl_dir = metadata.impl_dir + "/" if metadata.impl_dir else "" %}
{% set namespace_name = Name(metadata.native_namespace) %}
{% set native_namespace = namespace_name.namespace_case() %}
{% set native_dir = impl_dir + namespace_name.snake_case() %}
{% set api = metadata.api.lower() %}
#include "{{native_dir}}/{{api}}_absl_format_autogen.h"
#include "{{native_dir}}/ObjectType_autogen.h"
namespace {{native_namespace}} {
//
// Descriptors
//
{% for type in by_category["structure"] %}
{% for member in type.members %}
{% if member.name.canonical_case() == "label" %}
absl::FormatConvertResult<absl::FormatConversionCharSet::kString>
AbslFormatConvert(const {{as_cppType(type.name)}}* value,
const absl::FormatConversionSpec& spec,
absl::FormatSink* s) {
if (value == nullptr) {
s->Append("[null]");
return {true};
}
s->Append("[{{as_cppType(type.name)}}");
if (value->label != nullptr) {
s->Append(absl::StrFormat(" \"%s\"", value->label));
}
s->Append("]");
return {true};
}
{% endif %}
{% endfor %}
{% endfor %}
} // namespace {{native_namespace}}
{% set namespace = metadata.namespace %}
namespace {{namespace}} {
//
// Enums
//
{% for type in by_category["enum"] %}
absl::FormatConvertResult<absl::FormatConversionCharSet::kString>
AbslFormatConvert({{as_cppType(type.name)}} value,
const absl::FormatConversionSpec& spec,
absl::FormatSink* s) {
s->Append("{{as_cppType(type.name)}}::");
switch (value) {
{% for value in type.values %}
case {{as_cppType(type.name)}}::{{as_cppEnum(value.name)}}:
s->Append("{{as_cppEnum(value.name)}}");
break;
{% endfor %}
default:
s->Append(absl::StrFormat("%x", static_cast<typename std::underlying_type<{{as_cppType(type.name)}}>::type>(value)));
}
return {true};
}
{% endfor %}
//
// Bitmasks
//
{% for type in by_category["bitmask"] %}
absl::FormatConvertResult<absl::FormatConversionCharSet::kString>
AbslFormatConvert({{as_cppType(type.name)}} value,
const absl::FormatConversionSpec& spec,
absl::FormatSink* s) {
s->Append("{{as_cppType(type.name)}}::");
if (!static_cast<bool>(value)) {
{% for value in type.values if value.value == 0 %}
// 0 is often explicitly declared as None.
s->Append("{{as_cppEnum(value.name)}}");
{% else %}
s->Append(absl::StrFormat("{{as_cppType(type.name)}}::%x", 0));
{% endfor %}
return {true};
}
bool moreThanOneBit = !HasZeroOrOneBits(value);
if (moreThanOneBit) {
s->Append("(");
}
bool first = true;
{% for value in type.values if value.value != 0 %}
if (value & {{as_cppType(type.name)}}::{{as_cppEnum(value.name)}}) {
if (!first) {
s->Append("|");
}
first = false;
s->Append("{{as_cppEnum(value.name)}}");
value &= ~{{as_cppType(type.name)}}::{{as_cppEnum(value.name)}};
}
{% endfor %}
if (static_cast<bool>(value)) {
if (!first) {
s->Append("|");
}
s->Append(absl::StrFormat("{{as_cppType(type.name)}}::%x", static_cast<typename std::underlying_type<{{as_cppType(type.name)}}>::type>(value)));
}
if (moreThanOneBit) {
s->Append(")");
}
return {true};
}
{% endfor %}
} // namespace {{namespace}}