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#include <node.h>

#include <node_os.h>

#include <platform.h>

#include <v8.h>

#include <errno.h>

#include <string.h>

#ifdef __MINGW32__

# include <platform_win32.h>

# include <platform_win32_winsock.h>

#endif

#ifdef __POSIX__

# include <unistd.h> // gethostname, sysconf

# include <sys/utsname.h>

#endif

namespace node {

using namespace v8;

static Handle<Value> GetHostname(const Arguments& args) {

HandleScope scope;

char s[255];

int r = gethostname(s, 255);

if (r < 0) {

#ifdef __POSIX__

return ThrowException(ErrnoException(errno, "gethostname"));

#else // __MINGW32__

return ThrowException(ErrnoException(WSAGetLastError(), "gethostname"));

#endif // __MINGW32__

}

return scope.Close(String::New(s));

}

static Handle<Value> GetOSType(const Arguments& args) {

HandleScope scope;

#ifdef __POSIX__

char type[256];

struct utsname info;

uname(&info);

strncpy(type, info.sysname, strlen(info.sysname));

type[strlen(info.sysname)] = 0;

return scope.Close(String::New(type));

#else // __MINGW32__

return scope.Close(String::New("Windows_NT"));

#endif

}

static Handle<Value> GetOSRelease(const Arguments& args) {

HandleScope scope;

char release[256];

#ifdef __POSIX__

struct utsname info;

uname(&info);

strncpy(release, info.release, strlen(info.release));

release[strlen(info.release)] = 0;

#else // __MINGW32__

OSVERSIONINFO info;

info.dwOSVersionInfoSize = sizeof(info);

if (GetVersionEx(&info) == 0) {

return Undefined();

}

sprintf(release, "%d.%d.%d", static_cast<int>(info.dwMajorVersion),

static_cast<int>(info.dwMinorVersion), static_cast<int>(info.dwBuildNumber));

#endif

return scope.Close(String::New(release));

}

static Handle<Value> GetCPUInfo(const Arguments& args) {

HandleScope scope;

Local<Array> cpus;

int r = Platform::GetCPUInfo(&cpus);

if (r < 0) {

return Undefined();

}

return scope.Close(cpus);

}

static Handle<Value> GetFreeMemory(const Arguments& args) {

HandleScope scope;

double amount = Platform::GetFreeMemory();

if (amount < 0) {

return Undefined();

}

return scope.Close(Number::New(amount));

}

static Handle<Value> GetTotalMemory(const Arguments& args) {

HandleScope scope;

double amount = Platform::GetTotalMemory();

if (amount < 0) {

return Undefined();

}

return scope.Close(Number::New(amount));

}

static Handle<Value> GetUptime(const Arguments& args) {

HandleScope scope;

double uptime = Platform::GetUptime();

if (uptime < 0) {

return Undefined();

}

return scope.Close(Number::New(uptime));

}

static Handle<Value> GetLoadAvg(const Arguments& args) {

HandleScope scope;

Local<Array> loads = Array::New(3);

int r = Platform::GetLoadAvg(&loads);

if (r < 0) {

return Undefined();

}

return scope.Close(loads);

}

void OS::Initialize(v8::Handle<v8::Object> target) {

HandleScope scope;

NODE_SET_METHOD(target, "getHostname", GetHostname);

NODE_SET_METHOD(target, "getLoadAvg", GetLoadAvg);

NODE_SET_METHOD(target, "getUptime", GetUptime);

NODE_SET_METHOD(target, "getTotalMem", GetTotalMemory);

NODE_SET_METHOD(target, "getFreeMem", GetFreeMemory);

NODE_SET_METHOD(target, "getCPUs", GetCPUInfo);

NODE_SET_METHOD(target, "getOSType", GetOSType);

NODE_SET_METHOD(target, "getOSRelease", GetOSRelease);

}

} // namespace node

NODE_MODULE(node_os, node::OS::Initialize);