| // Copyright 2019 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| package codegen |
| |
| const bitsTemplate = ` |
| {{- define "BitsForwardDeclaration" }} |
| {{ EnsureNamespace . }} |
| {{- if .IsStrict }} |
| {{- /* strict bits */}} |
| {{- .Docs }} |
| enum class {{ .Name }} : {{ .Type }} { |
| {{- range .Members }} |
| {{ .Docs }} |
| {{ .Name }} = {{ .Value }}, |
| {{- end }} |
| }; |
| |
| const static {{ .Name }} {{ .MaskName.Name }} = static_cast<{{ .Name }}>({{ .Mask }}u); |
| |
| constexpr inline {{ . }} operator|({{ . }} _lhs, {{ . }} _rhs) { |
| return static_cast<{{ . }}>( |
| static_cast<{{ .Type }}>(_lhs) | static_cast<{{ .Type }}>(_rhs)); |
| } |
| |
| constexpr inline {{ . }}& operator|=({{ . }}& _lhs, |
| {{ . }} _rhs) { |
| _lhs = _lhs | _rhs; |
| return _lhs; |
| } |
| |
| constexpr inline {{ . }} operator&({{ . }} _lhs, |
| {{ . }} _rhs) { |
| return static_cast<{{ . }}>( |
| static_cast<{{ .Type }}>(_lhs) & static_cast<{{ .Type }}>(_rhs)); |
| } |
| |
| constexpr inline {{ . }}& operator&=({{ . }}& _lhs, |
| {{ . }} _rhs) { |
| _lhs = _lhs & _rhs; |
| return _lhs; |
| } |
| |
| constexpr inline {{ . }} operator^({{ . }} _lhs, |
| {{ . }} _rhs) { |
| return static_cast<{{ . }}>( |
| static_cast<{{ .Type }}>(_lhs) ^ static_cast<{{ .Type }}>(_rhs)); |
| } |
| |
| constexpr inline {{ . }}& operator^=({{ . }}& _lhs, |
| {{ . }} _rhs) { |
| _lhs = _lhs ^ _rhs; |
| return _lhs; |
| } |
| |
| constexpr inline {{ . }} operator~({{ . }} _value) { |
| return static_cast<{{ . }}>( |
| ~static_cast<{{ .Type }}>(_value) & static_cast<{{ .Type }}>({{ .MaskName }})); |
| } |
| |
| {{- else }} |
| {{- /* flexible bits */}} |
| {{- .Docs }} |
| // |{{ .Name }}| is flexible, hence may contain unknown members not |
| // defined in the FIDL schema. |
| class {{ .Name }} final { |
| public: |
| constexpr {{ .Name }}() = default; |
| constexpr {{ .Name }}(const {{ .Name }}& other) = default; |
| |
| // Constructs an instance of |{{ .Name }}| from an underlying primitive value |
| // if the primitive does not contain any unknown members not defined in the |
| // FIDL schema. Otherwise, returns |cpp17::nullopt|. |
| constexpr inline static cpp17::optional<{{ .Name }}> TryFrom({{ .Type }} value) { |
| if (value & ~kMask.value_) { |
| return cpp17::nullopt; |
| } |
| return {{ .Name }}(value & {{ .Name }}::kMask.value_); |
| } |
| |
| // Constructs an instance of |{{ .Name }}| from an underlying primitive value, |
| // clearing any bit member not defined in the FIDL schema. |
| constexpr inline static {{ .Name }} TruncatingUnknown({{ .Type }} value) { |
| return {{ .Name }}(value & {{ .Name }}::kMask.value_); |
| } |
| |
| // Constructs an instance of |{{ .Name }}| from an underlying primitive value, |
| // preserving any bit member not defined in the FIDL schema. |
| constexpr explicit {{ .Name }}({{ .Type }} value) : value_(value) {} |
| |
| {{- range .Members }} |
| const static {{ $.Name }} {{ .Name }}; |
| {{- end }} |
| const static {{ .Name }} kMask; |
| |
| explicit constexpr inline operator {{ .Type }}() const { return value_; } |
| explicit constexpr inline operator bool() const { return static_cast<bool>(value_); } |
| constexpr inline bool operator==(const {{ .Name }}& other) const { return value_ == other.value_; } |
| constexpr inline bool operator!=(const {{ .Name }}& other) const { return value_ != other.value_; } |
| constexpr inline {{ .Name }} operator~() const; |
| constexpr inline {{ .Name }} operator|(const {{ .Name }}& other) const; |
| constexpr inline {{ .Name }} operator&(const {{ .Name }}& other) const; |
| constexpr inline {{ .Name }} operator^(const {{ .Name }}& other) const; |
| constexpr inline void operator|=(const {{ .Name }}& other); |
| constexpr inline void operator&=(const {{ .Name }}& other); |
| constexpr inline void operator^=(const {{ .Name }}& other); |
| |
| {{- if .IsFlexible }} |
| constexpr inline {{ .Name }} unknown_bits() const { |
| return *this & {{ .Name }}(~kMask.value_); |
| } |
| constexpr inline bool has_unknown_bits() const { return static_cast<bool>(unknown_bits()); } |
| {{- end }} |
| |
| private: |
| {{ .Type }} value_ = 0; |
| }; |
| |
| #if !(__cplusplus < 201703) |
| |
| {{- range $member := .Members }} |
| constexpr const {{ $ }} {{ $.Name }}::{{ $member.Name }} = {{ $ }}({{ $member.Value }}); |
| {{- end }} |
| constexpr const {{ . }} {{ .Name }}::kMask = {{ $ }}({{ .Mask }}u); |
| |
| #endif // !(__cplusplus < 201703) |
| |
| constexpr inline {{ . }} {{ .Name }}::operator~() const { |
| return {{ $ }}(static_cast<{{ .Type }}>(~this->value_ & kMask.value_)); |
| } |
| |
| constexpr inline {{ . }} {{ .Name }}::operator|( |
| const {{ . }}& other) const { |
| return {{ $ }}(static_cast<{{ .Type }}>(this->value_ | other.value_)); |
| } |
| |
| constexpr inline {{ . }} {{ .Name }}::operator&( |
| const {{ . }}& other) const { |
| return {{ $ }}(static_cast<{{ .Type }}>(this->value_ & other.value_)); |
| } |
| |
| constexpr inline {{ . }} {{ .Name }}::operator^( |
| const {{ . }}& other) const { |
| return {{ $ }}(static_cast<{{ .Type }}>(this->value_ ^ other.value_)); |
| } |
| |
| constexpr inline void {{ .Name }}::operator|=( |
| const {{ . }}& other) { |
| this->value_ |= other.value_; |
| } |
| |
| constexpr inline void {{ .Name }}::operator&=( |
| const {{ . }}& other) { |
| this->value_ &= other.value_; |
| } |
| |
| constexpr inline void {{ .Name }}::operator^=( |
| const {{ . }}& other) { |
| this->value_ ^= other.value_; |
| } |
| {{- end }} |
| |
| inline zx_status_t Clone({{ . }} value, |
| {{ . }}* result) { |
| *result = value; |
| return ZX_OK; |
| } |
| |
| {{- end }} |
| |
| {{- define "BitsDefinition" }} |
| {{ EnsureNamespace . }} |
| {{- if .IsFlexible }} |
| #if (__cplusplus < 201703) |
| |
| {{- range $member := .Members }} |
| constexpr const {{ $ }} {{ $.Name }}::{{ $member.Name }} = {{ $ }}({{ $member.Value }}); |
| {{- end }} |
| constexpr const {{ . }} {{ .Name }}::kMask = {{ $ }}({{ .Mask }}u); |
| |
| #endif // (__cplusplus < 201703) |
| {{- end }} |
| {{- end }} |
| |
| {{- define "BitsTraits" }} |
| template <> |
| struct CodingTraits<{{ . }}> { |
| static constexpr size_t inline_size_old = sizeof({{ . }}); |
| static constexpr size_t inline_size_v1_no_ee = sizeof({{ . }}); |
| static void Encode(Encoder* encoder, {{ . }}* value, size_t offset, |
| cpp17::optional<::fidl::HandleInformation> maybe_handle_info) { |
| ZX_DEBUG_ASSERT(!maybe_handle_info); |
| {{ .Type }} underlying = static_cast<{{ .Type }}>(*value); |
| ::fidl::Encode(encoder, &underlying, offset); |
| } |
| static void Decode(Decoder* decoder, {{ . }}* value, size_t offset) { |
| {{ .Type }} underlying = {}; |
| ::fidl::Decode(decoder, &underlying, offset); |
| *value = static_cast<{{ . }}>(underlying); |
| } |
| }; |
| |
| inline zx_status_t Clone({{ . }} value, |
| {{ . }}* result) { |
| return {{ .Namespace }}::Clone(value, result); |
| } |
| |
| template<> |
| struct Equality<{{ . }}> { |
| bool operator()(const {{ . }}& _lhs, const {{ . }}& _rhs) const { |
| {{ .Type }} _lhs_underlying = static_cast<{{ .Type }}>(_lhs); |
| {{ .Type }} _rhs_underlying = static_cast<{{ .Type }}>(_rhs); |
| return ::fidl::Equals(_lhs_underlying, _rhs_underlying); |
| } |
| }; |
| {{- end }} |
| ` |