third_party/protobuf/src/google/protobuf/compiler/cpp/cpp

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
DotsToUnderscores
DotsToColons
MakeKeywordsMap
UnderscoresToCamelCase
HasExtension
ClassName
ClassName
SuperClassName
FieldName
FieldConstantName
FieldMessageTypeName
StripProto
PrimitiveTypeName
DeclaredTypeMethodName
DefaultValue
FilenameIdentifier
GlobalAddDescriptorsName
GlobalAssignDescriptorsName
GlobalShutdownFileName
EscapeTrigraphs
StaticInitializersForced
PrintHandlingOptionalStaticInitializers
PrintHandlingOptionalStaticInitializers
HasEnumDefinitions
HasEnumDefinitions
// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// http://code.google.com/p/protobuf/
//
// 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 <limits>
#include <map>
#include <vector>
#include <google/protobuf/stubs/hash.h>

#include <google/protobuf/compiler/cpp/cpp_helpers.h>
#include <google/protobuf/io/printer.h>
#include <google/protobuf/stubs/common.h>
#include <google/protobuf/stubs/strutil.h>
#include <google/protobuf/stubs/substitute.h>


namespace google {
namespace protobuf {
namespace compiler {
namespace cpp {

namespace {

string DotsToUnderscores(const string& name) {
  return StringReplace(name, ".", "_", true);
}

string DotsToColons(const string& name) {
  return StringReplace(name, ".", "::", true);
}

const char* const kKeywordList[] = {
  "and", "and_eq", "asm", "auto", "bitand", "bitor", "bool", "break", "case",
  "catch", "char", "class", "compl", "const", "const_cast", "continue",
  "default", "delete", "do", "double", "dynamic_cast", "else", "enum",
  "explicit", "extern", "false", "float", "for", "friend", "goto", "if",
  "inline", "int", "long", "mutable", "namespace", "new", "not", "not_eq",
  "operator", "or", "or_eq", "private", "protected", "public", "register",
  "reinterpret_cast", "return", "short", "signed", "sizeof", "static",
  "static_cast", "struct", "switch", "template", "this", "throw", "true", "try",
  "typedef", "typeid", "typename", "union", "unsigned", "using", "virtual",
  "void", "volatile", "wchar_t", "while", "xor", "xor_eq"
};

hash_set<string> MakeKeywordsMap() {
  hash_set<string> result;
  for (int i = 0; i < GOOGLE_ARRAYSIZE(kKeywordList); i++) {
    result.insert(kKeywordList[i]);
  }
  return result;
}

hash_set<string> kKeywords = MakeKeywordsMap();

string UnderscoresToCamelCase(const string& input, bool cap_next_letter) {
  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') {
      // Capital letters 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;
    }
  }
  return result;
}

// Returns whether the provided descriptor has an extension. This includes its
// nested types.
bool HasExtension(const Descriptor* descriptor) {
  if (descriptor->extension_count() > 0) {
    return true;
  }
  for (int i = 0; i < descriptor->nested_type_count(); ++i) {
    if (HasExtension(descriptor->nested_type(i))) {
      return true;
    }
  }
  return false;
}

}  // namespace

const char kThickSeparator[] =
  "// ===================================================================\n";
const char kThinSeparator[] =
  "// -------------------------------------------------------------------\n";

string ClassName(const Descriptor* descriptor, bool qualified) {

  // Find "outer", the descriptor of the top-level message in which
  // "descriptor" is embedded.
  const Descriptor* outer = descriptor;
  while (outer->containing_type() != NULL) outer = outer->containing_type();

  const string& outer_name = outer->full_name();
  string inner_name = descriptor->full_name().substr(outer_name.size());

  if (qualified) {
    return "::" + DotsToColons(outer_name) + DotsToUnderscores(inner_name);
  } else {
    return outer->name() + DotsToUnderscores(inner_name);
  }
}

string ClassName(const EnumDescriptor* enum_descriptor, bool qualified) {
  if (enum_descriptor->containing_type() == NULL) {
    if (qualified) {
      return "::" + DotsToColons(enum_descriptor->full_name());
    } else {
      return enum_descriptor->name();
    }
  } else {
    string result = ClassName(enum_descriptor->containing_type(), qualified);
    result += '_';
    result += enum_descriptor->name();
    return result;
  }
}


string SuperClassName(const Descriptor* descriptor) {
  return HasDescriptorMethods(descriptor->file()) ?
      "::google::protobuf::Message" : "::google::protobuf::MessageLite";
}

string FieldName(const FieldDescriptor* field) {
  string result = field->name();
  LowerString(&result);
  if (kKeywords.count(result) > 0) {
    result.append("_");
  }
  return result;
}

string FieldConstantName(const FieldDescriptor *field) {
  string field_name = UnderscoresToCamelCase(field->name(), true);
  string result = "k" + field_name + "FieldNumber";

  if (!field->is_extension() &&
      field->containing_type()->FindFieldByCamelcaseName(
        field->camelcase_name()) != field) {
    // This field's camelcase name is not unique.  As a hack, add the field
    // number to the constant name.  This makes the constant rather useless,
    // but what can we do?
    result += "_" + SimpleItoa(field->number());
  }

  return result;
}

string FieldMessageTypeName(const FieldDescriptor* field) {
  // Note:  The Google-internal version of Protocol Buffers uses this function
  //   as a hook point for hacks to support legacy code.
  return ClassName(field->message_type(), true);
}

string StripProto(const string& filename) {
  if (HasSuffixString(filename, ".protodevel")) {
    return StripSuffixString(filename, ".protodevel");
  } else {
    return StripSuffixString(filename, ".proto");
  }
}

const char* PrimitiveTypeName(FieldDescriptor::CppType type) {
  switch (type) {
    case FieldDescriptor::CPPTYPE_INT32  : return "::google::protobuf::int32";
    case FieldDescriptor::CPPTYPE_INT64  : return "::google::protobuf::int64";
    case FieldDescriptor::CPPTYPE_UINT32 : return "::google::protobuf::uint32";
    case FieldDescriptor::CPPTYPE_UINT64 : return "::google::protobuf::uint64";
    case FieldDescriptor::CPPTYPE_DOUBLE : return "double";
    case FieldDescriptor::CPPTYPE_FLOAT  : return "float";
    case FieldDescriptor::CPPTYPE_BOOL   : return "bool";
    case FieldDescriptor::CPPTYPE_ENUM   : return "int";
    case FieldDescriptor::CPPTYPE_STRING : return "::std::string";
    case FieldDescriptor::CPPTYPE_MESSAGE: return NULL;

    // No default because we want the compiler to complain if any new
    // CppTypes are added.
  }

  GOOGLE_LOG(FATAL) << "Can't get here.";
  return NULL;
}

const char* DeclaredTypeMethodName(FieldDescriptor::Type type) {
  switch (type) {
    case FieldDescriptor::TYPE_INT32   : return "Int32";
    case FieldDescriptor::TYPE_INT64   : return "Int64";
    case FieldDescriptor::TYPE_UINT32  : return "UInt32";
    case FieldDescriptor::TYPE_UINT64  : return "UInt64";
    case FieldDescriptor::TYPE_SINT32  : return "SInt32";
    case FieldDescriptor::TYPE_SINT64  : return "SInt64";
    case FieldDescriptor::TYPE_FIXED32 : return "Fixed32";
    case FieldDescriptor::TYPE_FIXED64 : return "Fixed64";
    case FieldDescriptor::TYPE_SFIXED32: return "SFixed32";
    case FieldDescriptor::TYPE_SFIXED64: return "SFixed64";
    case FieldDescriptor::TYPE_FLOAT   : return "Float";
    case FieldDescriptor::TYPE_DOUBLE  : return "Double";

    case FieldDescriptor::TYPE_BOOL    : return "Bool";
    case FieldDescriptor::TYPE_ENUM    : return "Enum";

    case FieldDescriptor::TYPE_STRING  : return "String";
    case FieldDescriptor::TYPE_BYTES   : return "Bytes";
    case FieldDescriptor::TYPE_GROUP   : return "Group";
    case FieldDescriptor::TYPE_MESSAGE : return "Message";

    // No default because we want the compiler to complain if any new
    // types are added.
  }
  GOOGLE_LOG(FATAL) << "Can't get here.";
  return "";
}

string DefaultValue(const FieldDescriptor* field) {
  switch (field->cpp_type()) {
    case FieldDescriptor::CPPTYPE_INT32:
      // gcc rejects the decimal form of kint32min and kint64min.
      if (field->default_value_int32() == kint32min) {
        // Make sure we are in a 2's complement system.
        GOOGLE_COMPILE_ASSERT(
            (uint32)kint32min == (uint32)0 - (uint32)0x80000000,
            kint32min_value_error);
        return "-0x80000000";
      }
      return SimpleItoa(field->default_value_int32());
    case FieldDescriptor::CPPTYPE_UINT32:
      return SimpleItoa(field->default_value_uint32()) + "u";
    case FieldDescriptor::CPPTYPE_INT64:
      // See the comments for CPPTYPE_INT32.
      if (field->default_value_int64() == kint64min) {
        // Make sure we are in a 2's complement system.
        GOOGLE_COMPILE_ASSERT(
            (uint64)kint64min ==
                (uint64)0 - (uint64)GOOGLE_LONGLONG(0x8000000000000000),
            kint64min_value_error);
        return "GOOGLE_LONGLONG(-0x8000000000000000)";
      }
      return "GOOGLE_LONGLONG(" + SimpleItoa(field->default_value_int64()) + ")";
    case FieldDescriptor::CPPTYPE_UINT64:
      return "GOOGLE_ULONGLONG(" + SimpleItoa(field->default_value_uint64())+ ")";
    case FieldDescriptor::CPPTYPE_DOUBLE: {
      double value = field->default_value_double();
      if (value == numeric_limits<double>::infinity()) {
        return "::google::protobuf::internal::Infinity()";
      } else if (value == -numeric_limits<double>::infinity()) {
        return "-::google::protobuf::internal::Infinity()";
      } else if (value != value) {
        return "::google::protobuf::internal::NaN()";
      } else {
        return SimpleDtoa(value);
      }
    }
    case FieldDescriptor::CPPTYPE_FLOAT:
      {
        float value = field->default_value_float();
        if (value == numeric_limits<float>::infinity()) {
          return "static_cast<float>(::google::protobuf::internal::Infinity())";
        } else if (value == -numeric_limits<float>::infinity()) {
          return "static_cast<float>(-::google::protobuf::internal::Infinity())";
        } else if (value != value) {
          return "static_cast<float>(::google::protobuf::internal::NaN())";
        } else {
          string float_value = SimpleFtoa(value);
          // If floating point value contains a period (.) or an exponent
          // (either E or e), then append suffix 'f' to make it a float
          // literal.
          if (float_value.find_first_of(".eE") != string::npos) {
            float_value.push_back('f');
          }
          return float_value;
        }
      }
    case FieldDescriptor::CPPTYPE_BOOL:
      return field->default_value_bool() ? "true" : "false";
    case FieldDescriptor::CPPTYPE_ENUM:
      // Lazy:  Generate a static_cast because we don't have a helper function
      //   that constructs the full name of an enum value.
      return strings::Substitute(
          "static_cast< $0 >($1)",
          ClassName(field->enum_type(), true),
          field->default_value_enum()->number());
    case FieldDescriptor::CPPTYPE_STRING:
      return "\"" + EscapeTrigraphs(
        CEscape(field->default_value_string())) +
        "\"";
    case FieldDescriptor::CPPTYPE_MESSAGE:
      return FieldMessageTypeName(field) + "::default_instance()";
  }
  // Can't actually get here; make compiler happy.  (We could add a default
  // case above but then we wouldn't get the nice compiler warning when a
  // new type is added.)
  GOOGLE_LOG(FATAL) << "Can't get here.";
  return "";
}

// Convert a file name into a valid identifier.
string FilenameIdentifier(const string& filename) {
  string result;
  for (int i = 0; i < filename.size(); i++) {
    if (ascii_isalnum(filename[i])) {
      result.push_back(filename[i]);
    } else {
      // Not alphanumeric.  To avoid any possibility of name conflicts we
      // use the hex code for the character.
      result.push_back('_');
      char buffer[kFastToBufferSize];
      result.append(FastHexToBuffer(static_cast<uint8>(filename[i]), buffer));
    }
  }
  return result;
}

// Return the name of the AddDescriptors() function for a given file.
string GlobalAddDescriptorsName(const string& filename) {
  return "protobuf_AddDesc_" + FilenameIdentifier(filename);
}

// Return the name of the AssignDescriptors() function for a given file.
string GlobalAssignDescriptorsName(const string& filename) {
  return "protobuf_AssignDesc_" + FilenameIdentifier(filename);
}

// Return the name of the ShutdownFile() function for a given file.
string GlobalShutdownFileName(const string& filename) {
  return "protobuf_ShutdownFile_" + FilenameIdentifier(filename);
}

// Escape C++ trigraphs by escaping question marks to \?
string EscapeTrigraphs(const string& to_escape) {
  return StringReplace(to_escape, "?", "\\?", true);
}

bool StaticInitializersForced(const FileDescriptor* file) {
  if (HasDescriptorMethods(file) || file->extension_count() > 0) {
    return true;
  }
  for (int i = 0; i < file->message_type_count(); ++i) {
    if (HasExtension(file->message_type(i))) {
      return true;
    }
  }
  return false;
}

void PrintHandlingOptionalStaticInitializers(
    const FileDescriptor* file, io::Printer* printer,
    const char* with_static_init, const char* without_static_init,
    const char* var1, const string& val1,
    const char* var2, const string& val2) {
  map<string, string> vars;
  if (var1) {
    vars[var1] = val1;
  }
  if (var2) {
    vars[var2] = val2;
  }
  PrintHandlingOptionalStaticInitializers(
      vars, file, printer, with_static_init, without_static_init);
}

void PrintHandlingOptionalStaticInitializers(
    const map<string, string>& vars, const FileDescriptor* file,
    io::Printer* printer, const char* with_static_init,
    const char* without_static_init) {
  if (StaticInitializersForced(file)) {
    printer->Print(vars, with_static_init);
  } else {
    printer->Print(vars, (string(
      "#ifdef GOOGLE_PROTOBUF_NO_STATIC_INITIALIZER\n") +
      without_static_init +
      "#else\n" +
      with_static_init +
      "#endif\n").c_str());
  }
}


static bool HasEnumDefinitions(const Descriptor* message_type) {
  if (message_type->enum_type_count() > 0) return true;
  for (int i = 0; i < message_type->nested_type_count(); ++i) {
    if (HasEnumDefinitions(message_type->nested_type(i))) return true;
  }
  return false;
}

bool HasEnumDefinitions(const FileDescriptor* file) {
  if (file->enum_type_count() > 0) return true;
  for (int i = 0; i < file->message_type_count(); ++i) {
    if (HasEnumDefinitions(file->message_type(i))) return true;
  }
  return false;
}

}  // namespace cpp
}  // namespace compiler
}  // namespace protobuf
}  // namespace google
/* [<][>][^][v][top][bottom][index][help] */
root/third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_helpers.cc

DEFINITIONS
