mirror of
https://github.com/protobuf-c/protobuf-c.git
synced 2026-01-17 21:31:18 +01:00
9f1e80e275
protobuf 30.x changes various APIs to return string_view's rather than
string&'s. This broke protobuf-c, since we were relying on the implicit
construction of strings from string&'s in various places.
This commit explicitly constructs strings from the string_view's
returned by the protobuf 30.x API when we need to store an owned string
(e.g. in a hash map). This maintains compatibility with older versions
of protobuf such as 3.21 in Debian/Ubuntu while extending compatibility
to the latest protobuf 30.x.
Without this commit we get lots of errors like this when compiling
against protobuf 30.x:
protoc-gen-c/c_field.cc:119:43: error: no match for 'operator=' (operand types are 'std::map<std::__cxx11::basic_string<char>, std::__cxx11::basic_string<char> >::mapped_type' {aka 'std::__cxx11::basic_string<char>'} and 'google::protobuf::internal::DescriptorStringView' {aka 'absl::debian7::string_view'})
247 lines
10 KiB
C++
247 lines
10 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) 2008-2025, Dave Benson and the protobuf-c authors.
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// 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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#include <google/protobuf/descriptor.h>
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#include <google/protobuf/io/printer.h>
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#include <google/protobuf/stubs/common.h>
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#include <protobuf-c/protobuf-c.pb.h>
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#include "c_bytes_field.h"
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#include "c_enum_field.h"
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#include "c_field.h"
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#include "c_helpers.h"
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#include "c_message_field.h"
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#include "c_primitive_field.h"
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#include "c_string_field.h"
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#include "compat.h"
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namespace protobuf_c {
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FieldGenerator::~FieldGenerator()
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{
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}
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static bool is_packable_type(google::protobuf::FieldDescriptor::Type type)
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{
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return type == google::protobuf::FieldDescriptor::TYPE_DOUBLE
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|| type == google::protobuf::FieldDescriptor::TYPE_FLOAT
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|| type == google::protobuf::FieldDescriptor::TYPE_INT64
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|| type == google::protobuf::FieldDescriptor::TYPE_UINT64
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|| type == google::protobuf::FieldDescriptor::TYPE_INT32
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|| type == google::protobuf::FieldDescriptor::TYPE_FIXED64
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|| type == google::protobuf::FieldDescriptor::TYPE_FIXED32
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|| type == google::protobuf::FieldDescriptor::TYPE_BOOL
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|| type == google::protobuf::FieldDescriptor::TYPE_UINT32
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|| type == google::protobuf::FieldDescriptor::TYPE_ENUM
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|| type == google::protobuf::FieldDescriptor::TYPE_SFIXED32
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|| type == google::protobuf::FieldDescriptor::TYPE_SFIXED64
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|| type == google::protobuf::FieldDescriptor::TYPE_SINT32
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|| type == google::protobuf::FieldDescriptor::TYPE_SINT64;
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//TYPE_BYTES
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//TYPE_STRING
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//TYPE_GROUP
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//TYPE_MESSAGE
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}
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void FieldGenerator::GenerateDescriptorInitializerGeneric(google::protobuf::io::Printer* printer,
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bool optional_uses_has,
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const std::string &type_macro,
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const std::string &descriptor_addr) const
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{
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std::map<std::string, std::string> variables;
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const google::protobuf::OneofDescriptor *oneof = descriptor_->containing_oneof();
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const ProtobufCFileOptions opt = descriptor_->file()->options().GetExtension(pb_c_file);
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variables["TYPE"] = type_macro;
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variables["classname"] = FullNameToC(FieldScope(descriptor_)->full_name(), FieldScope(descriptor_)->file());
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variables["name"] = FieldName(descriptor_);
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if (opt.use_oneof_field_name())
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variables["proto_name"] = std::string(oneof->name());
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else
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variables["proto_name"] = std::string(descriptor_->name());
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variables["descriptor_addr"] = descriptor_addr;
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variables["value"] = SimpleItoa(descriptor_->number());
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if (oneof != NULL)
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variables["oneofname"] = CamelToLower(oneof->name());
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if (FieldSyntax(descriptor_) == 3 &&
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descriptor_->label() == google::protobuf::FieldDescriptor::LABEL_OPTIONAL) {
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variables["LABEL"] = "NONE";
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optional_uses_has = false;
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} else {
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variables["LABEL"] = CamelToUpper(GetLabelName(descriptor_->label()));
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}
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if (descriptor_->has_default_value()) {
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variables["default_value"] = std::string("&")
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+ FullNameToLower(descriptor_->full_name(), descriptor_->file())
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+ "__default_value";
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} else if (FieldSyntax(descriptor_) == 3 &&
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descriptor_->type() == google::protobuf::FieldDescriptor::TYPE_STRING) {
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variables["default_value"] = "&protobuf_c_empty_string";
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} else {
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variables["default_value"] = "NULL";
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}
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variables["flags"] = "0";
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if (descriptor_->label() == google::protobuf::FieldDescriptor::LABEL_REPEATED
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&& is_packable_type (descriptor_->type())
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&& descriptor_->options().packed()) {
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variables["flags"] += " | PROTOBUF_C_FIELD_FLAG_PACKED";
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} else if (descriptor_->label() == google::protobuf::FieldDescriptor::LABEL_REPEATED
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&& is_packable_type (descriptor_->type())
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&& FieldSyntax(descriptor_) == 3
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&& !descriptor_->options().has_packed()) {
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variables["flags"] += " | PROTOBUF_C_FIELD_FLAG_PACKED";
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}
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if (descriptor_->options().deprecated())
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variables["flags"] += " | PROTOBUF_C_FIELD_FLAG_DEPRECATED";
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if (oneof != NULL)
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variables["flags"] += " | PROTOBUF_C_FIELD_FLAG_ONEOF";
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// Eliminate codesmell "or with 0"
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if (variables["flags"].find("0 | ") == 0) {
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variables["flags"].erase(0, 4);
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}
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printer->Print("{\n");
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if (descriptor_->file()->options().has_optimize_for() &&
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descriptor_->file()->options().optimize_for() ==
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google::protobuf::FileOptions_OptimizeMode_CODE_SIZE) {
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printer->Print(" NULL, /* CODE_SIZE */\n");
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} else {
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printer->Print(variables, " \"$proto_name$\",\n");
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}
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printer->Print(variables,
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" $value$,\n"
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" PROTOBUF_C_LABEL_$LABEL$,\n"
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" PROTOBUF_C_TYPE_$TYPE$,\n");
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switch (descriptor_->label()) {
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case google::protobuf::FieldDescriptor::LABEL_REQUIRED:
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printer->Print(variables, " 0, /* quantifier_offset */\n");
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break;
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case google::protobuf::FieldDescriptor::LABEL_OPTIONAL:
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if (oneof != NULL) {
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printer->Print(variables, " offsetof($classname$, $oneofname$_case),\n");
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} else if (optional_uses_has) {
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printer->Print(variables, " offsetof($classname$, has_$name$),\n");
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} else {
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printer->Print(variables, " 0, /* quantifier_offset */\n");
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}
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break;
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case google::protobuf::FieldDescriptor::LABEL_REPEATED:
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printer->Print(variables, " offsetof($classname$, n_$name$),\n");
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break;
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}
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printer->Print(variables, " offsetof($classname$, $name$),\n");
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printer->Print(variables, " $descriptor_addr$,\n");
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printer->Print(variables, " $default_value$,\n");
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printer->Print(variables, " $flags$, /* flags */\n");
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printer->Print(variables, " 0,NULL,NULL /* reserved1,reserved2, etc */\n");
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printer->Print("},\n");
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}
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FieldGeneratorMap::FieldGeneratorMap(const google::protobuf::Descriptor* descriptor)
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: descriptor_(descriptor),
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field_generators_(
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new std::unique_ptr<FieldGenerator>[descriptor->field_count()]) {
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// Construct all the FieldGenerators.
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for (int i = 0; i < descriptor->field_count(); i++) {
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field_generators_[i].reset(MakeGenerator(descriptor->field(i)));
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}
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}
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FieldGenerator* FieldGeneratorMap::MakeGenerator(const google::protobuf::FieldDescriptor* field) {
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const ProtobufCFieldOptions opt = field->options().GetExtension(pb_c_field);
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switch (field->type()) {
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case google::protobuf::FieldDescriptor::TYPE_MESSAGE:
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return new MessageFieldGenerator(field);
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case google::protobuf::FieldDescriptor::TYPE_STRING:
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if (opt.string_as_bytes())
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return new BytesFieldGenerator(field);
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else
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return new StringFieldGenerator(field);
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case google::protobuf::FieldDescriptor::TYPE_BYTES:
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return new BytesFieldGenerator(field);
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case google::protobuf::FieldDescriptor::TYPE_ENUM:
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return new EnumFieldGenerator(field);
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case google::protobuf::FieldDescriptor::TYPE_GROUP:
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return 0; // XXX
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default:
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return new PrimitiveFieldGenerator(field);
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}
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}
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FieldGeneratorMap::~FieldGeneratorMap() {}
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const FieldGenerator& FieldGeneratorMap::get(
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const google::protobuf::FieldDescriptor* field) const {
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GOOGLE_CHECK_EQ(field->containing_type(), descriptor_);
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return *field_generators_[field->index()];
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}
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} // namespace protobuf_c
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