/* * Copyright 2017 WebAssembly Community Group participants * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include "source-error-handler.h" #include namespace wabt { std::string SourceErrorHandler::DefaultErrorMessage( const Location* loc, const std::string& error, const std::string& source_line, size_t source_line_column_offset) { std::string result = string_printf("%s:%d:%d: %s\n", loc->filename, loc->line, loc->first_column, error.c_str()); if (!source_line.empty()) { result += source_line; result += '\n'; size_t num_spaces = (loc->first_column - 1) - source_line_column_offset; size_t num_carets = loc->last_column - loc->first_column; num_carets = std::min(num_carets, source_line.size() - num_spaces); num_carets = std::max(num_carets, 1); result.append(num_spaces, ' '); result.append(num_carets, '^'); result += '\n'; } return result; } SourceErrorHandlerFile::SourceErrorHandlerFile(FILE* file, const std::string& header, PrintHeader print_header, size_t source_line_max_length) : file_(file), header_(header), print_header_(print_header), source_line_max_length_(source_line_max_length) {} bool SourceErrorHandlerFile::OnError(const Location* loc, const std::string& error, const std::string& source_line, size_t source_line_column_offset) { PrintErrorHeader(); std::string message = DefaultErrorMessage(loc, error, source_line, source_line_column_offset); fwrite(message.data(), 1, message.size(), file_); return true; } void SourceErrorHandlerFile::PrintErrorHeader() { if (header_.empty()) return; switch (print_header_) { case PrintHeader::Never: break; case PrintHeader::Once: print_header_ = PrintHeader::Never; // Fallthrough. case PrintHeader::Always: fprintf(file_, "%s:\n", header_.c_str()); break; } // If there's a header, indent the following message. fprintf(file_, " "); } SourceErrorHandlerBuffer::SourceErrorHandlerBuffer( size_t source_line_max_length) : source_line_max_length_(source_line_max_length) {} bool SourceErrorHandlerBuffer::OnError(const Location* loc, const std::string& error, const std::string& source_line, size_t source_line_column_offset) { buffer_ += DefaultErrorMessage(loc, error, source_line, source_line_column_offset); return true; } } // namespace wabt