From eb7c9f97959e4c074698eea72b7da20d25f19faa Mon Sep 17 00:00:00 2001
From: Bent Bisballe Nyeng <deva@aasimon.org>
Date: Sat, 18 Sep 2021 15:54:34 +0200
Subject: Initial support for compiling with msvc/cl.exe on windows.

---
 src/execute.cc | 47 ++++++++++++++++++++++++++++++++++++++++-------
 1 file changed, 40 insertions(+), 7 deletions(-)

(limited to 'src/execute.cc')

diff --git a/src/execute.cc b/src/execute.cc
index 610ccdd..df22f61 100644
--- a/src/execute.cc
+++ b/src/execute.cc
@@ -3,11 +3,16 @@
 // See accompanying file LICENSE for details.
 #include "execute.h"
 
-#include <unistd.h>
 #include <cstring>
+#if !defined(_WIN32)
+#include <unistd.h>
 #include <sys/types.h>
 #include <sys/wait.h>
 #include <spawn.h>
+#else
+#include <processthreadsapi.h>
+#include <synchapi.h>
+#endif
 #include <iostream>
 
 /*
@@ -18,6 +23,7 @@ https://stackoverflow.com/questions/4259629/what-is-the-difference-between-fork-
  */
 
 
+#if !defined(_WIN32)
 namespace
 {
 int parent_waitpid(pid_t pid)
@@ -32,6 +38,7 @@ int parent_waitpid(pid_t pid)
 	return WEXITSTATUS(status);
 }
 } // namespace ::
+#endif
 
 int execute(const std::string& command,
             const std::vector<std::string>& args,
@@ -45,9 +52,9 @@ int execute(const std::string& command,
 	}
 	argv.push_back(nullptr);
 
+	std::string cmd;
 	if(verbose)
 	{
-		std::string cmd;
 		for(const auto& arg : argv)
 		{
 			if(arg == nullptr)
@@ -64,27 +71,53 @@ int execute(const std::string& command,
 		std::cout << cmd << "\n";
 	}
 
+#if !defined(_WIN32)
+
 #if 1
 	auto pid = vfork();
 	if(pid == 0)
 	{
+		// TODO: use execvpe to set LD_LIBRARY_PATH
 		execv(command.data(), (char**)argv.data());
 		std::cout << "Could not execute " << command << ": " <<
 			strerror(errno) << "\n";
 		_exit(1); // execv only returns if an error occurred
 	}
-	auto ret = parent_waitpid(pid);
+
+	return parent_waitpid(pid);
 #elif 0
 	pid_t pid;
+	const char * envp[] = {nullptr}; // TODO: use this to set LD_LIBRARY_PATH
 	if(posix_spawn(&pid, command.data(), nullptr, nullptr,
-	               (char**)argv.data(), nullptr))
+	               (char**)argv.data(), envp))
 	{
 		return 1;
 	}
-	auto ret = parent_waitpid(pid);
+	return parent_waitpid(pid);
 #else
-	auto ret = system(cmd.data());
+	return system(cmd.data());
 #endif
 
-	return ret;
+#else
+	STARTUPINFO si;
+	PROCESS_INFORMATION pi;
+	ZeroMemory(&si,sizeof(si));
+	si.cb=sizeof(si);
+	ZeroMemory(&pi,sizeof(pi));
+	// TODO: Use SetDllDirectory(...) to set DLL search directory
+	if(!CreateProcess(nullptr, //"C:/WINDOWS/notepad.exe",
+	                  //"notepad.exe c:/readme.txt",0,0,0,0,0,0,&si,&pi))
+	                  (char*)cmd.data(),0,0,0,0,0,0,&si,&pi))
+	{
+		return 1; // Could not start process;
+	}
+
+	// Now 'pi.hProcess' contains the process HANDLE, which you can use to
+	// wait for it like this:
+	const DWORD infinite = 0xFFFFFFFF;
+	WaitForSingleObject(pi.hProcess, infinite);
+	DWORD exitCode{0};
+	GetExitCodeProcess(pi.hProcess, &exitCode);
+	return exitCode;
+#endif
 }
-- 
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