#ifdef _WIN32
#include <windows.h>
#else
#include <sys/utsname.h>
#include <string.h>
#endif
#include <stdio.h>

int ver_underbars = 0;

char *ver()
{
	char *q;
#ifdef _WIN32
	static char verbuf[256];
#else
	static char verbuf[4*SYS_NMLN + 4];
#endif

#ifdef _WIN32
	OSVERSIONINFO VersionInfo;

	VersionInfo.dwOSVersionInfoSize = sizeof(VersionInfo);
	if(GetVersionEx(&VersionInfo)) {
		if(strlen(VersionInfo.szCSDVersion) > 200)
			VersionInfo.szCSDVersion[100] = 0;
		sprintf(verbuf, "Windows %d.%d build%d PlatformId %d SP=\"%s\"",
			VersionInfo.dwMajorVersion,
			VersionInfo.dwMinorVersion,
			VersionInfo.dwBuildNumber,
			VersionInfo.dwPlatformId,
			VersionInfo.szCSDVersion);
	}
	else {
		strcpy(verbuf, "WINDOWS UNKNOWN");
	}
#else
	struct utsname ubuf;

	if(uname(&ubuf)) {
		strcpy(verbuf, "LINUX UNKNOWN");
	}
	else {
		sprintf(verbuf,"%s %s %s %s",
			ubuf.sysname,
			ubuf.release,
			ubuf.version,
			ubuf.machine);
	}
#endif
	// Substitute an underbar for white space. Makes output
	// easier to parse.
	if(ver_underbars) {
		for(q = verbuf; *q; q++)
			if(*q == ' '  || *q == '\t' || *q == '\n' || *q == '\r' ||
			   *q == '\b' || *q == '\f')
				*q = '_';
	}
	return verbuf;
}

#ifdef MAIN
int main(int ac, char *av)
{
	if(ac > 1) ver_underbars = 1;
	printf("%s\n", ver());
	return 0;
}
#endif