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/*
* Copyright 2018 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 "wabt/error-formatter.h"
namespace wabt {
namespace {
std::string FormatError(const Error& error,
Location::Type location_type,
const Color& color,
LexerSourceLineFinder* line_finder,
int source_line_max_length,
int indent) {
std::string indent_str(indent, ' ');
std::string result = indent_str;
result += color.MaybeBoldCode();
const Location& loc = error.loc;
if (!loc.filename.empty()) {
result += loc.filename;
result += ":";
}
if (location_type == Location::Type::Text) {
result += StringPrintf("%d:%d: ", loc.line, loc.first_column);
} else if (loc.offset != kInvalidOffset) {
result += StringPrintf("%07" PRIzx ": ", loc.offset);
}
result += color.MaybeRedCode();
result += GetErrorLevelName(error.error_level);
result += ": ";
result += color.MaybeDefaultCode();
result += error.message;
result += '\n';
LexerSourceLineFinder::SourceLine source_line;
if (line_finder) {
line_finder->GetSourceLine(loc, source_line_max_length, &source_line);
}
if (!source_line.line.empty()) {
result += indent_str;
result += source_line.line;
result += '\n';
result += indent_str;
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.line.size() - num_spaces);
num_carets = std::max<size_t>(num_carets, 1);
result.append(num_spaces, ' ');
result += color.MaybeBoldCode();
result += color.MaybeGreenCode();
result.append(num_carets, '^');
result += color.MaybeDefaultCode();
result += '\n';
}
return result;
}
} // End of anonymous namespace
std::string FormatErrorsToString(const Errors& errors,
Location::Type location_type,
LexerSourceLineFinder* line_finder,
const Color& color,
const std::string& header,
PrintHeader print_header,
int source_line_max_length) {
std::string result;
for (const auto& error : errors) {
if (!header.empty()) {
switch (print_header) {
case PrintHeader::Never:
break;
case PrintHeader::Once:
print_header = PrintHeader::Never;
[[fallthrough]];
case PrintHeader::Always:
result += header;
result += ":\n";
break;
}
}
int indent = header.empty() ? 0 : 2;
result += FormatError(error, location_type, color, line_finder,
source_line_max_length, indent);
}
return result;
}
void FormatErrorsToFile(const Errors& errors,
Location::Type location_type,
LexerSourceLineFinder* line_finder,
FILE* file,
const std::string& header,
PrintHeader print_header,
int source_line_max_length) {
Color color(file);
std::string s =
FormatErrorsToString(errors, location_type, line_finder, color, header,
print_header, source_line_max_length);
fwrite(s.data(), 1, s.size(), file);
}
} // namespace wabt
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