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/*
* 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 "wabt/color.h"
#include <cstdlib>
#include "wabt/common.h"
#if HAVE_WIN32_VT100
#include <io.h>
#include <windows.h>
#elif HAVE_UNISTD_H
#include <unistd.h>
#endif
namespace wabt {
Color::Color(FILE* file, bool enabled) : file_(file) {
enabled_ = enabled && SupportsColor(file_);
}
// static
bool Color::SupportsColor(FILE* file) {
char* force = getenv("FORCE_COLOR");
if (force) {
return atoi(force) != 0;
}
#if HAVE_WIN32_VT100
HANDLE handle;
if (file == stdout) {
handle = GetStdHandle(STD_OUTPUT_HANDLE);
} else if (file == stderr) {
handle = GetStdHandle(STD_ERROR_HANDLE);
} else {
return false;
}
DWORD mode;
if (!_isatty(_fileno(file)) || !GetConsoleMode(handle, &mode) ||
!SetConsoleMode(handle, mode | ENABLE_VIRTUAL_TERMINAL_PROCESSING)) {
return false;
}
return true;
// TODO(binji): Support older Windows by using SetConsoleTextAttribute?
#elif HAVE_UNISTD_H
return isatty(fileno(file));
#else
return false;
#endif
}
void Color::WriteCode(const char* code) const {
if (enabled_) {
fputs(code, file_);
}
}
} // namespace wabt
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