mirror of
https://github.com/protobuf-c/protobuf-c.git
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8194f4d91a
This is a first cut at adding proto3 support. As far as I understand protobuf-c already has pretty much everything needed once it is built using a new version of protobuf itself. The only missing thing is that in proto3 all fields are optional and having to manually set has_foo is inconvenient. This patch special cases the proto3 syntax files so that structs for the bytes, enum and primitive fields do not emit the has_ field. It also adds PROTOBUF_C_LABEL_NONE to the label enum that is used for proto3 fields. When a fields has this label, the quantifier is not consulted and instead the field is packed/unpacked depending on whether it has a value different from NULL/0.
198 lines
8.2 KiB
C++
198 lines
8.2 KiB
C++
// Protocol Buffers - Google's data interchange format
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// Copyright 2008 Google Inc. All rights reserved.
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// http://code.google.com/p/protobuf/
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Author: kenton@google.com (Kenton Varda)
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// Based on original Protocol Buffers design by
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// Sanjay Ghemawat, Jeff Dean, and others.
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// Copyright (c) 2008-2013, Dave Benson. All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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//
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Modified to implement C code by Dave Benson.
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#ifndef GOOGLE_PROTOBUF_COMPILER_C_HELPERS_H__
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#define GOOGLE_PROTOBUF_COMPILER_C_HELPERS_H__
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#include <string>
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#include <vector>
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#include <sstream>
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#include <google/protobuf/descriptor.h>
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#include <google/protobuf/descriptor.pb.h>
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#include <google/protobuf/io/printer.h>
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namespace google {
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namespace protobuf {
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namespace compiler {
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namespace c {
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// Returns the non-nested type name for the given type. If "qualified" is
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// true, prefix the type with the full namespace. For example, if you had:
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// package foo.bar;
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// message Baz { message Qux {} }
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// Then the qualified ClassName for Qux would be:
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// Foo__Bar__Baz_Qux
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// While the non-qualified version would be:
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// Baz_Qux
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string ClassName(const Descriptor* descriptor, bool qualified);
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string ClassName(const EnumDescriptor* enum_descriptor, bool qualified);
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// --- Borrowed from stubs. ---
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template <typename T> string SimpleItoa(T n) {
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std::stringstream stream;
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stream << n;
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return stream.str();
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}
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string SimpleFtoa(float f);
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string SimpleDtoa(double f);
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void SplitStringUsing(const string &str, const char *delim, std::vector<string> *out);
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string CEscape(const string& src);
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string StringReplace(const string& s, const string& oldsub, const string& newsub, bool replace_all);
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inline bool HasSuffixString(const string& str, const string& suffix) { return str.size() >= suffix.size() && str.compare(str.size() - suffix.size(), suffix.size(), suffix) == 0; }
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inline string StripSuffixString(const string& str, const string& suffix) { if (HasSuffixString(str, suffix)) { return str.substr(0, str.size() - suffix.size()); } else { return str; } }
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char* FastHexToBuffer(int i, char* buffer);
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// Get the (unqualified) name that should be used for this field in C code.
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// The name is coerced to lower-case to emulate proto1 behavior. People
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// should be using lowercase-with-underscores style for proto field names
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// anyway, so normally this just returns field->name().
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string FieldName(const FieldDescriptor* field);
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// Get macro string for deprecated field
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string FieldDeprecated(const FieldDescriptor* field);
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// Returns the scope where the field was defined (for extensions, this is
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// different from the message type to which the field applies).
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inline const Descriptor* FieldScope(const FieldDescriptor* field) {
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return field->is_extension() ?
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field->extension_scope() : field->containing_type();
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}
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// convert a CamelCase class name into an all uppercase affair
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// with underscores separating words, e.g. MyClass becomes MY_CLASS.
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string CamelToUpper(const string &class_name);
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string CamelToLower(const string &class_name);
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// lowercased, underscored name to camel case
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string ToCamel(const string &name);
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// lowercase the string
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string ToLower(const string &class_name);
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string ToUpper(const string &class_name);
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// full_name() to lowercase with underscores
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string FullNameToLower(const string &full_name);
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string FullNameToUpper(const string &full_name);
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// full_name() to c-typename (with underscores for packages, otherwise camel case)
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string FullNameToC(const string &class_name);
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// Splits, indents, formats, and prints comment lines
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void PrintComment (io::Printer* printer, string comment);
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// make a string of spaces as long as input
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string ConvertToSpaces(const string &input);
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// Strips ".proto" or ".protodevel" from the end of a filename.
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string StripProto(const string& filename);
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// Get the C++ type name for a primitive type (e.g. "double", "::google::protobuf::int32", etc.).
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// Note: non-built-in type names will be qualified, meaning they will start
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// with a ::. If you are using the type as a template parameter, you will
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// need to insure there is a space between the < and the ::, because the
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// ridiculous C++ standard defines "<:" to be a synonym for "[".
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const char* PrimitiveTypeName(FieldDescriptor::CppType type);
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// Get the declared type name in CamelCase format, as is used e.g. for the
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// methods of WireFormat. For example, TYPE_INT32 becomes "Int32".
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const char* DeclaredTypeMethodName(FieldDescriptor::Type type);
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// Convert a file name into a valid identifier.
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string FilenameIdentifier(const string& filename);
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// Return the name of the BuildDescriptors() function for a given file.
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string GlobalBuildDescriptorsName(const string& filename);
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// return 'required', 'optional', or 'repeated'
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string GetLabelName(FieldDescriptor::Label label);
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// write IntRanges entries for a bunch of sorted values.
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// returns the number of ranges there are to bsearch.
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unsigned WriteIntRanges(io::Printer* printer, int n_values, const int *values, const string &name);
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struct NameIndex
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{
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unsigned index;
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const char *name;
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};
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int compare_name_indices_by_name(const void*, const void*);
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// Return the syntax version of the file containing the field.
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// This wrapper is needed to be able to compile against protobuf2.
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inline int FieldSyntax(const FieldDescriptor* field) {
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#ifdef HAVE_PROTO3
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return field->file()->syntax() == FileDescriptor::SYNTAX_PROTO3 ? 3 : 2;
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#else
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return 2;
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#endif
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}
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} // namespace c
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} // namespace compiler
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} // namespace protobuf
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} // namespace google
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#endif // GOOGLE_PROTOBUF_COMPILER_C_HELPERS_H__
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