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#include "upbc/common.h"

#include "absl/strings/str_replace.h"

namespace upbc {
namespace {

namespace protobuf = ::google::protobuf;

}  // namespace

std::string StripExtension(absl::string_view fname) {
  size_t lastdot = fname.find_last_of('.');
  if (lastdot == std::string::npos) {
    return std::string(fname);
  }
  return std::string(fname.substr(0, lastdot));
}

std::string ToCIdent(absl::string_view str) {
  return absl::StrReplaceAll(str, {{".", "_"}, {"/", "_"}});
}

std::string ToPreproc(absl::string_view str) {
  return absl::AsciiStrToUpper(ToCIdent(str));
}

void EmitFileWarning(const protobuf::FileDescriptor* file, Output& output) {
  output(
      "/* This file was generated by upbc (the upb compiler) from the input\n"
      " * file:\n"
      " *\n"
      " *     $0\n"
      " *\n"
      " * Do not edit -- your changes will be discarded when the file is\n"
      " * regenerated. */\n\n",
      file->name());
}

std::string MessageName(const protobuf::Descriptor* descriptor) {
  return ToCIdent(descriptor->full_name());
}

std::string FileLayoutName(const google::protobuf::FileDescriptor* file) {
  return ToCIdent(file->name()) + "_upb_file_layout";
}

std::string HeaderFilename(const google::protobuf::FileDescriptor* file) {
  return StripExtension(file->name()) + ".upb.h";
}

}  // namespace upbc
