1 files changed, 318 insertions, 0 deletions
diff --git a/gfx/angle/checkout/src/common/system_utils_win.cpp b/gfx/angle/checkout/src/common/system_utils_win.cpp
new file mode 100644
index 0000000000..796e928192
--- /dev/null
+++ b/gfx/angle/checkout/src/common/system_utils_win.cpp
@@ -0,0 +1,318 @@
+//
+// Copyright (c) 2014 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// system_utils_win.cpp: Implementation of OS-specific functions for Windows
+
+#include "system_utils.h"
+
+#include <stdarg.h>
+#include <windows.h>
+#include <array>
+#include <vector>
+
+namespace angle
+{
+namespace
+{
+struct ScopedPipe
+{
+    ~ScopedPipe()
+    {
+        closeReadHandle();
+        closeWriteHandle();
+    }
+    void closeReadHandle()
+    {
+        if (readHandle)
+        {
+            CloseHandle(readHandle);
+            readHandle = nullptr;
+        }
+    }
+    void closeWriteHandle()
+    {
+        if (writeHandle)
+        {
+            CloseHandle(writeHandle);
+            writeHandle = nullptr;
+        }
+    }
+    HANDLE readHandle  = nullptr;
+    HANDLE writeHandle = nullptr;
+};
+
+void ReadEntireFile(HANDLE handle, std::string *out)
+{
+    out->clear();
+
+    while (true)
+    {
+        char buffer[256];
+        DWORD bytesRead;
+
+        BOOL success = ReadFile(handle, buffer, sizeof(buffer), &bytesRead, nullptr);
+
+        if (!success || bytesRead == 0)
+        {
+            break;
+        }
+
+        out->append(buffer, bytesRead);
+    }
+}
+}  // anonymous namespace
+
+std::string GetExecutablePath()
+{
+    std::array<char, MAX_PATH> executableFileBuf;
+    DWORD executablePathLen = GetModuleFileNameA(nullptr, executableFileBuf.data(),
+                                                 static_cast<DWORD>(executableFileBuf.size()));
+    return (executablePathLen > 0 ? std::string(executableFileBuf.data()) : "");
+}
+
+std::string GetExecutableDirectory()
+{
+    std::string executablePath = GetExecutablePath();
+    size_t lastPathSepLoc      = executablePath.find_last_of("\\/");
+    return (lastPathSepLoc != std::string::npos) ? executablePath.substr(0, lastPathSepLoc) : "";
+}
+
+const char *GetSharedLibraryExtension()
+{
+    return "dll";
+}
+
+Optional<std::string> GetCWD()
+{
+    std::array<char, MAX_PATH> pathBuf;
+    DWORD result = GetCurrentDirectoryA(static_cast<DWORD>(pathBuf.size()), pathBuf.data());
+    if (result == 0)
+    {
+        return Optional<std::string>::Invalid();
+    }
+    return std::string(pathBuf.data());
+}
+
+bool SetCWD(const char *dirName)
+{
+    return (SetCurrentDirectoryA(dirName) == TRUE);
+}
+
+bool UnsetEnvironmentVar(const char *variableName)
+{
+    return (SetEnvironmentVariableA(variableName, nullptr) == TRUE);
+}
+
+bool SetEnvironmentVar(const char *variableName, const char *value)
+{
+    return (SetEnvironmentVariableA(variableName, value) == TRUE);
+}
+
+std::string GetEnvironmentVar(const char *variableName)
+{
+    std::array<char, MAX_PATH> oldValue;
+    DWORD result =
+        GetEnvironmentVariableA(variableName, oldValue.data(), static_cast<DWORD>(oldValue.size()));
+    if (result == 0)
+    {
+        return std::string();
+    }
+    else
+    {
+        return std::string(oldValue.data());
+    }
+}
+
+const char *GetPathSeparator()
+{
+    return ";";
+}
+
+bool RunApp(const std::vector<const char *> &args,
+            std::string *stdoutOut,
+            std::string *stderrOut,
+            int *exitCodeOut)
+{
+    ScopedPipe stdoutPipe;
+    ScopedPipe stderrPipe;
+
+    SECURITY_ATTRIBUTES sa_attr;
+    // Set the bInheritHandle flag so pipe handles are inherited.
+    sa_attr.nLength              = sizeof(SECURITY_ATTRIBUTES);
+    sa_attr.bInheritHandle       = TRUE;
+    sa_attr.lpSecurityDescriptor = nullptr;
+
+    // Create pipes for stdout and stderr.  Ensure the read handles to the pipes are not inherited.
+    if (stdoutOut && !CreatePipe(&stdoutPipe.readHandle, &stdoutPipe.writeHandle, &sa_attr, 0) &&
+        !SetHandleInformation(stdoutPipe.readHandle, HANDLE_FLAG_INHERIT, 0))
+    {
+        return false;
+    }
+    if (stderrOut && !CreatePipe(&stderrPipe.readHandle, &stderrPipe.writeHandle, &sa_attr, 0) &&
+        !SetHandleInformation(stderrPipe.readHandle, HANDLE_FLAG_INHERIT, 0))
+    {
+        return false;
+    }
+
+    // Concat the nicely separated arguments into one string so the application has to reparse it.
+    // We don't support quotation and spaces in arguments currently.
+    std::vector<char> commandLineString;
+    for (const char *arg : args)
+    {
+        if (arg)
+        {
+            if (!commandLineString.empty())
+            {
+                commandLineString.push_back(' ');
+            }
+            commandLineString.insert(commandLineString.end(), arg, arg + strlen(arg));
+        }
+    }
+    commandLineString.push_back('\0');
+
+    STARTUPINFOA startInfo = {};
+
+    startInfo.cb        = sizeof(STARTUPINFOA);
+    startInfo.hStdInput = GetStdHandle(STD_INPUT_HANDLE);
+    if (stdoutOut)
+    {
+        startInfo.hStdOutput = stdoutPipe.writeHandle;
+    }
+    else
+    {
+        startInfo.hStdError = GetStdHandle(STD_OUTPUT_HANDLE);
+    }
+    if (stderrOut)
+    {
+        startInfo.hStdError = stderrPipe.writeHandle;
+    }
+    else
+    {
+        startInfo.hStdError = GetStdHandle(STD_ERROR_HANDLE);
+    }
+
+    if (stderrOut || stdoutOut)
+    {
+        startInfo.dwFlags |= STARTF_USESTDHANDLES;
+    }
+
+    // Create the child process.
+    PROCESS_INFORMATION processInfo = {};
+    if (!CreateProcessA(nullptr, commandLineString.data(), nullptr, nullptr,
+                        TRUE,  // Handles are inherited.
+                        0, nullptr, nullptr, &startInfo, &processInfo))
+    {
+        return false;
+    }
+
+    // Close the write end of the pipes, so EOF can be generated when child exits.
+    stdoutPipe.closeWriteHandle();
+    stderrPipe.closeWriteHandle();
+
+    // Read back the output of the child.
+    if (stdoutOut)
+    {
+        ReadEntireFile(stdoutPipe.readHandle, stdoutOut);
+    }
+    if (stderrOut)
+    {
+        ReadEntireFile(stderrPipe.readHandle, stderrOut);
+    }
+
+    // Cleanup the child.
+    bool success = WaitForSingleObject(processInfo.hProcess, INFINITE) == WAIT_OBJECT_0;
+
+    if (success)
+    {
+        DWORD exitCode = 0;
+        success        = GetExitCodeProcess(processInfo.hProcess, &exitCode);
+
+        if (success)
+        {
+            *exitCodeOut = static_cast<int>(exitCode);
+        }
+    }
+
+    CloseHandle(processInfo.hProcess);
+    CloseHandle(processInfo.hThread);
+
+    return success;
+}
+
+class Win32Library : public Library
+{
+  public:
+    Win32Library(const char *libraryName, SearchType searchType)
+    {
+        char buffer[MAX_PATH];
+        int ret = snprintf(buffer, MAX_PATH, "%s.%s", libraryName, GetSharedLibraryExtension());
+        if (ret > 0 && ret < MAX_PATH)
+        {
+            switch (searchType)
+            {
+                case SearchType::ApplicationDir:
+                    mModule = LoadLibraryA(buffer);
+                    break;
+                case SearchType::SystemDir:
+                    mModule = LoadLibraryExA(buffer, nullptr, LOAD_LIBRARY_SEARCH_SYSTEM32);
+                    break;
+            }
+        }
+    }
+
+    ~Win32Library() override
+    {
+        if (mModule)
+        {
+            FreeLibrary(mModule);
+        }
+    }
+
+    void *getSymbol(const char *symbolName) override
+    {
+        if (!mModule)
+        {
+            return nullptr;
+        }
+
+        return reinterpret_cast<void *>(GetProcAddress(mModule, symbolName));
+    }
+
+    void *getNative() const override { return reinterpret_cast<void *>(mModule); }
+
+  private:
+    HMODULE mModule = nullptr;
+};
+
+Library *OpenSharedLibrary(const char *libraryName, SearchType searchType)
+{
+    return new Win32Library(libraryName, searchType);
+}
+
+bool IsDirectory(const char *filename)
+{
+    WIN32_FILE_ATTRIBUTE_DATA fileInformation;
+
+    BOOL result = GetFileAttributesExA(filename, GetFileExInfoStandard, &fileInformation);
+    if (result)
+    {
+        DWORD attribs = fileInformation.dwFileAttributes;
+        return (attribs != INVALID_FILE_ATTRIBUTES) && ((attribs & FILE_ATTRIBUTE_DIRECTORY) > 0);
+    }
+
+    return false;
+}
+
+bool IsDebuggerAttached()
+{
+    return !!::IsDebuggerPresent();
+}
+
+void BreakDebugger()
+{
+    __debugbreak();
+}
+}  // namespace angle