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// Copyright 2011 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "extensions/common/error_utils.h"
#include <initializer_list>
#include <ostream>
#include "base/check_op.h"
#include "base/strings/string_piece.h"
#include "base/strings/string_tokenizer.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
namespace extensions {
namespace {
std::string FormatErrorMessageInternal(
base::StringPiece format,
base::span<const base::StringPiece> args) {
std::string format_str(format);
base::StringTokenizer tokenizer(format_str, "*");
tokenizer.set_options(base::StringTokenizer::RETURN_DELIMS);
std::vector<base::StringPiece> result_pieces;
auto argument = args.begin();
while (tokenizer.GetNext()) {
if (!tokenizer.token_is_delim()) {
result_pieces.push_back(tokenizer.token_piece());
continue;
}
CHECK(argument != args.end())
<< "More placeholders (*) than substitutions.";
// Substitute the argument.
result_pieces.push_back(*argument);
std::advance(argument, 1);
}
// Not all substitutions were consumed.
CHECK(argument == args.end()) << "Fewer placeholders (*) than substitutions.";
return base::JoinString(result_pieces, "" /* separator */);
}
} // namespace
std::string ErrorUtils::FormatErrorMessage(
base::StringPiece format,
base::span<const base::StringPiece> args) {
return FormatErrorMessageInternal(format, args);
}
std::u16string ErrorUtils::FormatErrorMessageUTF16(
base::StringPiece format,
base::span<const base::StringPiece> args) {
return base::UTF8ToUTF16(FormatErrorMessageInternal(format, args));
}
} // namespace extensions
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