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https://github.com/encounter/dawn-cmake.git
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bee45bb79c
Change-Id: Ibde0793471606b9db783991aeb46e284225d5783 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/14624 Reviewed-by: Corentin Wallez <cwallez@chromium.org> Commit-Queue: Corentin Wallez <cwallez@chromium.org> Commit-Queue: Danusch Merrikh-Yazdi <danusch@google.com>
118 lines
3.6 KiB
C++
118 lines
3.6 KiB
C++
// Copyright 2019 The Dawn Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "common/SystemUtils.h"
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#if defined(DAWN_PLATFORM_WINDOWS)
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# include <Windows.h>
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# include <vector>
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#elif defined(DAWN_PLATFORM_LINUX)
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# include <limits.h>
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# include <unistd.h>
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# include <cstdlib>
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#elif defined(DAWN_PLATFORM_MACOS) || defined(DAWN_PLATFORM_IOS)
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# include <mach-o/dyld.h>
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# include <vector>
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#endif
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#include <array>
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#if defined(DAWN_PLATFORM_WINDOWS)
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const char* GetPathSeparator() {
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return "\\";
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}
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std::string GetEnvironmentVar(const char* variableName) {
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// First pass a size of 0 to get the size of variable value.
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char* tempBuf = nullptr;
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DWORD result = GetEnvironmentVariableA(variableName, tempBuf, 0);
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if (result == 0) {
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return "";
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}
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// Then get variable value with its actual size.
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std::vector<char> buffer(result + 1);
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if (GetEnvironmentVariableA(variableName, buffer.data(), static_cast<DWORD>(buffer.size())) ==
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0) {
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return "";
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}
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return std::string(buffer.data());
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}
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bool SetEnvironmentVar(const char* variableName, const char* value) {
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return SetEnvironmentVariableA(variableName, value) == TRUE;
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}
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#elif defined(DAWN_PLATFORM_POSIX)
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const char* GetPathSeparator() {
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return "/";
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}
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std::string GetEnvironmentVar(const char* variableName) {
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char* value = getenv(variableName);
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return value == nullptr ? "" : std::string(value);
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}
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bool SetEnvironmentVar(const char* variableName, const char* value) {
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return setenv(variableName, value, 1) == 0;
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}
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#else
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# error "Implement Get/SetEnvironmentVar for your platform."
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#endif
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#if defined(DAWN_PLATFORM_WINDOWS)
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std::string GetExecutablePath() {
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std::array<char, MAX_PATH> executableFileBuf;
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DWORD executablePathLen = GetModuleFileNameA(nullptr, executableFileBuf.data(),
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static_cast<DWORD>(executableFileBuf.size()));
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return executablePathLen > 0 ? std::string(executableFileBuf.data()) : "";
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}
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#elif defined(DAWN_PLATFORM_LINUX)
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std::string GetExecutablePath() {
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std::array<char, PATH_MAX> path;
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ssize_t result = readlink("/proc/self/exe", path.data(), PATH_MAX - 1);
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if (result < 0 || static_cast<size_t>(result) >= PATH_MAX - 1) {
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return "";
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}
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path[result] = '\0';
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return path.data();
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}
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#elif defined(DAWN_PLATFORM_MACOS) || defined(DAWN_PLATFORM_IOS)
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std::string GetExecutablePath() {
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uint32_t size = 0;
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_NSGetExecutablePath(nullptr, &size);
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std::vector<char> buffer(size + 1);
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if (_NSGetExecutablePath(buffer.data(), &size) != 0) {
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return "";
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}
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buffer[size] = '\0';
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return buffer.data();
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}
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#elif defined(DAWN_PLATFORM_FUCHSIA)
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std::string GetExecutablePath() {
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// TODO: Implement on Fuchsia
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return "";
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}
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#else
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# error "Implement GetExecutablePath for your platform."
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#endif
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std::string GetExecutableDirectory() {
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std::string exePath = GetExecutablePath();
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size_t lastPathSepLoc = exePath.find_last_of(GetPathSeparator());
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return lastPathSepLoc != std::string::npos ? exePath.substr(0, lastPathSepLoc + 1) : "";
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}
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