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Diffstat (limited to '')
-rw-r--r-- | third_party/wasm2c/src/color.cc | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/third_party/wasm2c/src/color.cc b/third_party/wasm2c/src/color.cc new file mode 100644 index 0000000000..15e9eb90bd --- /dev/null +++ b/third_party/wasm2c/src/color.cc @@ -0,0 +1,86 @@ +/* + * 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 _WIN32 +#if HAVE_WIN32_VT100 +#include <io.h> +#include <windows.h> +#endif +#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 _WIN32 + + { +#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; +#else + // TODO(binji): Support older Windows by using SetConsoleTextAttribute? + return false; +#endif + } + +#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 |