diff options
Diffstat (limited to 'third_party/protobuf/3.4.0/src/google/protobuf/compiler/csharp/csharp_helpers.cc')
| -rw-r--r-- | third_party/protobuf/3.4.0/src/google/protobuf/compiler/csharp/csharp_helpers.cc | 507 |
1 files changed, 507 insertions, 0 deletions
diff --git a/third_party/protobuf/3.4.0/src/google/protobuf/compiler/csharp/csharp_helpers.cc b/third_party/protobuf/3.4.0/src/google/protobuf/compiler/csharp/csharp_helpers.cc new file mode 100644 index 0000000000..5bca1ffa72 --- /dev/null +++ b/third_party/protobuf/3.4.0/src/google/protobuf/compiler/csharp/csharp_helpers.cc @@ -0,0 +1,507 @@ +// Protocol Buffers - Google's data interchange format +// Copyright 2008 Google Inc. All rights reserved. +// https://developers.google.com/protocol-buffers/ +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following disclaimer +// in the documentation and/or other materials provided with the +// distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +// Author: kenton@google.com (Kenton Varda) +// Based on original Protocol Buffers design by +// Sanjay Ghemawat, Jeff Dean, and others. + +#include <algorithm> +#include <google/protobuf/stubs/hash.h> +#include <limits> +#include <vector> + +#include <google/protobuf/compiler/csharp/csharp_helpers.h> +#include <google/protobuf/compiler/csharp/csharp_names.h> +#include <google/protobuf/descriptor.pb.h> +#include <google/protobuf/io/printer.h> +#include <google/protobuf/wire_format.h> +#include <google/protobuf/stubs/strutil.h> +#include <google/protobuf/stubs/substitute.h> + +#include <google/protobuf/compiler/csharp/csharp_field_base.h> +#include <google/protobuf/compiler/csharp/csharp_enum_field.h> +#include <google/protobuf/compiler/csharp/csharp_map_field.h> +#include <google/protobuf/compiler/csharp/csharp_message_field.h> +#include <google/protobuf/compiler/csharp/csharp_options.h> +#include <google/protobuf/compiler/csharp/csharp_primitive_field.h> +#include <google/protobuf/compiler/csharp/csharp_repeated_enum_field.h> +#include <google/protobuf/compiler/csharp/csharp_repeated_message_field.h> +#include <google/protobuf/compiler/csharp/csharp_repeated_primitive_field.h> +#include <google/protobuf/compiler/csharp/csharp_wrapper_field.h> + +namespace google { +namespace protobuf { +namespace compiler { +namespace csharp { + +CSharpType GetCSharpType(FieldDescriptor::Type type) { + switch (type) { + case FieldDescriptor::TYPE_INT32: + return CSHARPTYPE_INT32; + case FieldDescriptor::TYPE_INT64: + return CSHARPTYPE_INT64; + case FieldDescriptor::TYPE_UINT32: + return CSHARPTYPE_UINT32; + case FieldDescriptor::TYPE_UINT64: + return CSHARPTYPE_UINT32; + case FieldDescriptor::TYPE_SINT32: + return CSHARPTYPE_INT32; + case FieldDescriptor::TYPE_SINT64: + return CSHARPTYPE_INT64; + case FieldDescriptor::TYPE_FIXED32: + return CSHARPTYPE_UINT32; + case FieldDescriptor::TYPE_FIXED64: + return CSHARPTYPE_UINT64; + case FieldDescriptor::TYPE_SFIXED32: + return CSHARPTYPE_INT32; + case FieldDescriptor::TYPE_SFIXED64: + return CSHARPTYPE_INT64; + case FieldDescriptor::TYPE_FLOAT: + return CSHARPTYPE_FLOAT; + case FieldDescriptor::TYPE_DOUBLE: + return CSHARPTYPE_DOUBLE; + case FieldDescriptor::TYPE_BOOL: + return CSHARPTYPE_BOOL; + case FieldDescriptor::TYPE_ENUM: + return CSHARPTYPE_ENUM; + case FieldDescriptor::TYPE_STRING: + return CSHARPTYPE_STRING; + case FieldDescriptor::TYPE_BYTES: + return CSHARPTYPE_BYTESTRING; + case FieldDescriptor::TYPE_GROUP: + return CSHARPTYPE_MESSAGE; + case FieldDescriptor::TYPE_MESSAGE: + return CSHARPTYPE_MESSAGE; + + // No default because we want the compiler to complain if any new + // types are added. + } + GOOGLE_LOG(FATAL)<< "Can't get here."; + return (CSharpType) -1; +} + +std::string StripDotProto(const std::string& proto_file) { + int lastindex = proto_file.find_last_of("."); + return proto_file.substr(0, lastindex); +} + +std::string GetFileNamespace(const FileDescriptor* descriptor) { + if (descriptor->options().has_csharp_namespace()) { + return descriptor->options().csharp_namespace(); + } + return UnderscoresToCamelCase(descriptor->package(), true, true); +} + +// Returns the Pascal-cased last part of the proto file. For example, +// input of "google/protobuf/foo_bar.proto" would result in "FooBar". +std::string GetFileNameBase(const FileDescriptor* descriptor) { + std::string proto_file = descriptor->name(); + int lastslash = proto_file.find_last_of("/"); + std::string base = proto_file.substr(lastslash + 1); + return UnderscoresToPascalCase(StripDotProto(base)); +} + +std::string GetReflectionClassUnqualifiedName(const FileDescriptor* descriptor) { + // TODO: Detect collisions with existing messages, + // and append an underscore if necessary. + return GetFileNameBase(descriptor) + "Reflection"; +} + +// TODO(jtattermusch): can we reuse a utility function? +std::string UnderscoresToCamelCase(const std::string& input, + bool cap_next_letter, + bool preserve_period) { + string result; + // Note: I distrust ctype.h due to locales. + for (int i = 0; i < input.size(); i++) { + if ('a' <= input[i] && input[i] <= 'z') { + if (cap_next_letter) { + result += input[i] + ('A' - 'a'); + } else { + result += input[i]; + } + cap_next_letter = false; + } else if ('A' <= input[i] && input[i] <= 'Z') { + if (i == 0 && !cap_next_letter) { + // Force first letter to lower-case unless explicitly told to + // capitalize it. + result += input[i] + ('a' - 'A'); + } else { + // Capital letters after the first are left as-is. + result += input[i]; + } + cap_next_letter = false; + } else if ('0' <= input[i] && input[i] <= '9') { + result += input[i]; + cap_next_letter = true; + } else { + cap_next_letter = true; + if (input[i] == '.' && preserve_period) { + result += '.'; + } + } + } + // Add a trailing "_" if the name should be altered. + if (input[input.size() - 1] == '#') { + result += '_'; + } + return result; +} + +std::string UnderscoresToPascalCase(const std::string& input) { + return UnderscoresToCamelCase(input, true); +} + +// Convert a string which is expected to be SHOUTY_CASE (but may not be *precisely* shouty) +// into a PascalCase string. Precise rules implemented: + +// Previous input character Current character Case +// Any Non-alphanumeric Skipped +// None - first char of input Alphanumeric Upper +// Non-letter (e.g. _ or 1) Alphanumeric Upper +// Numeric Alphanumeric Upper +// Lower letter Alphanumeric Same as current +// Upper letter Alphanumeric Lower +std::string ShoutyToPascalCase(const std::string& input) { + string result; + // Simple way of implementing "always start with upper" + char previous = '_'; + for (int i = 0; i < input.size(); i++) { + char current = input[i]; + if (!ascii_isalnum(current)) { + previous = current; + continue; + } + if (!ascii_isalnum(previous)) { + result += ascii_toupper(current); + } else if (ascii_isdigit(previous)) { + result += ascii_toupper(current); + } else if (ascii_islower(previous)) { + result += current; + } else { + result += ascii_tolower(current); + } + previous = current; + } + return result; +} + +// Attempt to remove a prefix from a value, ignoring casing and skipping underscores. +// (foo, foo_bar) => bar - underscore after prefix is skipped +// (FOO, foo_bar) => bar - casing is ignored +// (foo_bar, foobarbaz) => baz - underscore in prefix is ignored +// (foobar, foo_barbaz) => baz - underscore in value is ignored +// (foo, bar) => bar - prefix isn't matched; return original value +std::string TryRemovePrefix(const std::string& prefix, const std::string& value) { + // First normalize to a lower-case no-underscores prefix to match against + std::string prefix_to_match = ""; + for (size_t i = 0; i < prefix.size(); i++) { + if (prefix[i] != '_') { + prefix_to_match += ascii_tolower(prefix[i]); + } + } + + // This keeps track of how much of value we've consumed + size_t prefix_index, value_index; + for (prefix_index = 0, value_index = 0; + prefix_index < prefix_to_match.size() && value_index < value.size(); + value_index++) { + // Skip over underscores in the value + if (value[value_index] == '_') { + continue; + } + if (ascii_tolower(value[value_index]) != prefix_to_match[prefix_index++]) { + // Failed to match the prefix - bail out early. + return value; + } + } + + // If we didn't finish looking through the prefix, we can't strip it. + if (prefix_index < prefix_to_match.size()) { + return value; + } + + // Step over any underscores after the prefix + while (value_index < value.size() && value[value_index] == '_') { + value_index++; + } + + // If there's nothing left (e.g. it was a prefix with only underscores afterwards), don't strip. + if (value_index == value.size()) { + return value; + } + + return value.substr(value_index); +} + +// Format the enum value name in a pleasant way for C#: +// - Strip the enum name as a prefix if possible +// - Convert to PascalCase. +// For example, an enum called Color with a value of COLOR_BLUE should +// result in an enum value in C# called just Blue +std::string GetEnumValueName(const std::string& enum_name, const std::string& enum_value_name) { + std::string stripped = TryRemovePrefix(enum_name, enum_value_name); + std::string result = ShoutyToPascalCase(stripped); + // Just in case we have an enum name of FOO and a value of FOO_2... make sure the returned + // string is a valid identifier. + if (ascii_isdigit(result[0])) { + result = "_" + result; + } + return result; +} + +std::string ToCSharpName(const std::string& name, const FileDescriptor* file) { + std::string result = GetFileNamespace(file); + if (result != "") { + result += '.'; + } + string classname; + if (file->package().empty()) { + classname = name; + } else { + // Strip the proto package from full_name since we've replaced it with + // the C# namespace. + classname = name.substr(file->package().size() + 1); + } + result += StringReplace(classname, ".", ".Types.", true); + return "global::" + result; +} + +std::string GetReflectionClassName(const FileDescriptor* descriptor) { + std::string result = GetFileNamespace(descriptor); + if (!result.empty()) { + result += '.'; + } + result += GetReflectionClassUnqualifiedName(descriptor); + return "global::" + result; +} + +std::string GetClassName(const Descriptor* descriptor) { + return ToCSharpName(descriptor->full_name(), descriptor->file()); +} + +std::string GetClassName(const EnumDescriptor* descriptor) { + return ToCSharpName(descriptor->full_name(), descriptor->file()); +} + +// Groups are hacky: The name of the field is just the lower-cased name +// of the group type. In C#, though, we would like to retain the original +// capitalization of the type name. +std::string GetFieldName(const FieldDescriptor* descriptor) { + if (descriptor->type() == FieldDescriptor::TYPE_GROUP) { + return descriptor->message_type()->name(); + } else { + return descriptor->name(); + } +} + +std::string GetFieldConstantName(const FieldDescriptor* field) { + return GetPropertyName(field) + "FieldNumber"; +} + +std::string GetPropertyName(const FieldDescriptor* descriptor) { + // TODO(jtattermusch): consider introducing csharp_property_name field option + std::string property_name = UnderscoresToPascalCase(GetFieldName(descriptor)); + // Avoid either our own type name or reserved names. Note that not all names + // are reserved - a field called to_string, write_to etc would still cause a problem. + // There are various ways of ending up with naming collisions, but we try to avoid obvious + // ones. + if (property_name == descriptor->containing_type()->name() + || property_name == "Types" + || property_name == "Descriptor") { + property_name += "_"; + } + return property_name; +} + +std::string GetOutputFile( + const google::protobuf::FileDescriptor* descriptor, + const std::string file_extension, + const bool generate_directories, + const std::string base_namespace, + string* error) { + string relative_filename = GetFileNameBase(descriptor) + file_extension; + if (!generate_directories) { + return relative_filename; + } + string ns = GetFileNamespace(descriptor); + string namespace_suffix = ns; + if (!base_namespace.empty()) { + // Check that the base_namespace is either equal to or a leading part of + // the file namespace. This isn't just a simple prefix; "Foo.B" shouldn't + // be regarded as a prefix of "Foo.Bar". The simplest option is to add "." + // to both. + string extended_ns = ns + "."; + if (extended_ns.find(base_namespace + ".") != 0) { + *error = "Namespace " + ns + " is not a prefix namespace of base namespace " + base_namespace; + return ""; // This will be ignored, because we've set an error. + } + namespace_suffix = ns.substr(base_namespace.length()); + if (namespace_suffix.find(".") == 0) { + namespace_suffix = namespace_suffix.substr(1); + } + } + + string namespace_dir = StringReplace(namespace_suffix, ".", "/", true); + if (!namespace_dir.empty()) { + namespace_dir += "/"; + } + return namespace_dir + relative_filename; +} + +// TODO: c&p from Java protoc plugin +// For encodings with fixed sizes, returns that size in bytes. Otherwise +// returns -1. +int GetFixedSize(FieldDescriptor::Type type) { + switch (type) { + case FieldDescriptor::TYPE_INT32 : return -1; + case FieldDescriptor::TYPE_INT64 : return -1; + case FieldDescriptor::TYPE_UINT32 : return -1; + case FieldDescriptor::TYPE_UINT64 : return -1; + case FieldDescriptor::TYPE_SINT32 : return -1; + case FieldDescriptor::TYPE_SINT64 : return -1; + case FieldDescriptor::TYPE_FIXED32 : return internal::WireFormatLite::kFixed32Size; + case FieldDescriptor::TYPE_FIXED64 : return internal::WireFormatLite::kFixed64Size; + case FieldDescriptor::TYPE_SFIXED32: return internal::WireFormatLite::kSFixed32Size; + case FieldDescriptor::TYPE_SFIXED64: return internal::WireFormatLite::kSFixed64Size; + case FieldDescriptor::TYPE_FLOAT : return internal::WireFormatLite::kFloatSize; + case FieldDescriptor::TYPE_DOUBLE : return internal::WireFormatLite::kDoubleSize; + + case FieldDescriptor::TYPE_BOOL : return internal::WireFormatLite::kBoolSize; + case FieldDescriptor::TYPE_ENUM : return -1; + + case FieldDescriptor::TYPE_STRING : return -1; + case FieldDescriptor::TYPE_BYTES : return -1; + case FieldDescriptor::TYPE_GROUP : return -1; + case FieldDescriptor::TYPE_MESSAGE : return -1; + + // No default because we want the compiler to complain if any new + // types are added. + } + GOOGLE_LOG(FATAL) << "Can't get here."; + return -1; +} + +static const char base64_chars[] = + "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; + +std::string StringToBase64(const std::string& input) { + std::string result; + size_t remaining = input.size(); + const unsigned char *src = (const unsigned char*) input.c_str(); + while (remaining > 2) { + result += base64_chars[src[0] >> 2]; + result += base64_chars[((src[0] & 0x3) << 4) | (src[1] >> 4)]; + result += base64_chars[((src[1] & 0xf) << 2) | (src[2] >> 6)]; + result += base64_chars[src[2] & 0x3f]; + remaining -= 3; + src += 3; + } + switch (remaining) { + case 2: + result += base64_chars[src[0] >> 2]; + result += base64_chars[((src[0] & 0x3) << 4) | (src[1] >> 4)]; + result += base64_chars[(src[1] & 0xf) << 2]; + result += '='; + src += 2; + break; + case 1: + result += base64_chars[src[0] >> 2]; + result += base64_chars[((src[0] & 0x3) << 4)]; + result += '='; + result += '='; + src += 1; + break; + } + return result; +} + +std::string FileDescriptorToBase64(const FileDescriptor* descriptor) { + std::string fdp_bytes; + FileDescriptorProto fdp; + descriptor->CopyTo(&fdp); + fdp.SerializeToString(&fdp_bytes); + return StringToBase64(fdp_bytes); +} + +FieldGeneratorBase* CreateFieldGenerator(const FieldDescriptor* descriptor, + int fieldOrdinal, + const Options* options) { + switch (descriptor->type()) { + case FieldDescriptor::TYPE_GROUP: + case FieldDescriptor::TYPE_MESSAGE: + if (descriptor->is_repeated()) { + if (descriptor->is_map()) { + return new MapFieldGenerator(descriptor, fieldOrdinal, options); + } else { + return new RepeatedMessageFieldGenerator(descriptor, fieldOrdinal, options); + } + } else { + if (IsWrapperType(descriptor)) { + if (descriptor->containing_oneof()) { + return new WrapperOneofFieldGenerator(descriptor, fieldOrdinal, options); + } else { + return new WrapperFieldGenerator(descriptor, fieldOrdinal, options); + } + } else { + if (descriptor->containing_oneof()) { + return new MessageOneofFieldGenerator(descriptor, fieldOrdinal, options); + } else { + return new MessageFieldGenerator(descriptor, fieldOrdinal, options); + } + } + } + case FieldDescriptor::TYPE_ENUM: + if (descriptor->is_repeated()) { + return new RepeatedEnumFieldGenerator(descriptor, fieldOrdinal, options); + } else { + if (descriptor->containing_oneof()) { + return new EnumOneofFieldGenerator(descriptor, fieldOrdinal, options); + } else { + return new EnumFieldGenerator(descriptor, fieldOrdinal, options); + } + } + default: + if (descriptor->is_repeated()) { + return new RepeatedPrimitiveFieldGenerator(descriptor, fieldOrdinal, options); + } else { + if (descriptor->containing_oneof()) { + return new PrimitiveOneofFieldGenerator(descriptor, fieldOrdinal, options); + } else { + return new PrimitiveFieldGenerator(descriptor, fieldOrdinal, options); + } + } + } +} + +} // namespace csharp +} // namespace compiler +} // namespace protobuf +} // namespace google |