Replace fDATIME with ANSI/POSIX clock_gettime(). Rip out DOS/AMIGA shims.

The thinking here is that we simplify life by going pure ANSI/POSIX.
This is a text game.  If it ever runs on anything but Unix again it's
almost certain to be on something like WSL that supplies a
POSIX-conformant text console.

Makefile

@@ -1,6 +1,6 @@
 # Makefile for the open-source release of adventure 2.5
 
-OBJS=main.o init.o actions1.o actions2.o score.o misc.o datime.o
+OBJS=main.o init.o actions1.o actions2.o score.o misc.o
 SOURCES=$(OBJS:.o=.c) COPYING NEWS README advent.text control
 
 .c.o:

datime.c

@@ -1,50 +0,0 @@
-#ifdef AMIGA
-#define _TIME_
-#include "exec/types.h"
-#include "intuition/intuition.h"
-
-#define INTUITIONREV 1
-
-struct IntuitionBase *IntuitionBase = NULL;
-
-fDATIME(X,Y)int *X, *Y; {
-static int GOTX = 0, GOTY;
-	if(GOTX == 0) {
-		IntuitionBase = (struct IntuitionBase *)
-			OpenLibrary("intuition.library", INTUITIONREV);
-		if (IntuitionBase == NULL) {
-			printf("Can't open library.\n");
-			exit(FALSE);
-			}
-		CurrentTime(&GOTX, &GOTY);
-		CloseLibrary(IntuitionBase);
-		}
-	GOTY += 654321;
-	if(GOTY >= 1000000) {GOTX += 1; GOTY -= 1000000;}
-	*X = GOTX;
-	*Y = GOTY;
-}
-#endif
-
-#ifdef __MSDOS__
-#define _TIME_
-#include "time.h"
-
-fDATIME(long *X,long *Y) {
-	time(X); time(Y);
-	*Y /= 2;
-	/* it would be even better if the two numbers were totally
-	 * unrelated, like if 'time' returned 64 bits of data */
-}
-#endif
-
-#ifndef _TIME_
-#include "sys/time.h"
-
-void fDATIME(long *X, long *Y) {
-	struct timeval now;
-	gettimeofday(&now, 0);
-	*X = now.tv_sec;
-	*Y = now.tv_usec;
-}
-#endif

init.c

@@ -641,14 +641,10 @@ static void quick_item(long*);
 static void quick_array(long*, long);
 
 static bool quick_init(void) {
-#ifdef AMIGA
-	f = fopen("ram:adventure.data", READ_MODE);
-#else
 	extern char *getenv();
 	char *adv = getenv("ADVENTURE");
 	f = NULL;
 	if(adv)f = fopen(adv,READ_MODE);
-#endif
 	if(f == NULL)f = fopen("adventure.data",READ_MODE);
 	if(f == NULL)return(FALSE);
 	init_reading = TRUE;

main.c

@@ -8,9 +8,6 @@
 #include "main.h"
 
 #include "misc.h"
-#ifdef __MSDOS__
-#include "alloc.h"
-#endif
 
 #define TRUE  (0==0)
 #define FALSE (0!=0)

misc.c

@@ -898,10 +898,6 @@ long I, VAL; static FILE *OPENED = NULL;
 	 goto L20;
 
 L15:	if(!OPENED){
-#ifdef AMIGA
-		OPENED=fopen("ram:adventure.text","r" /* NOT binary */);
-		if(!OPENED)
-#endif
 		OPENED=fopen("adventure.text","r" /* NOT binary */);
 		if(!OPENED){printf("Can't read adventure.text!\n"); exit(FALSE);}
 		}

misc.h

@@ -1,10 +1,8 @@
-#ifdef __MSDOS__	/* define fopen modes for binary files */
+#include <time.h>
+
+/* b is not needed for POSIX but harmless */
 #define READ_MODE "rb"
 #define WRITE_MODE "wb"
-#else
-#define READ_MODE "r"
-#define WRITE_MODE "w"
-#endif
 
 extern void fSPEAK(long);
 #define SPEAK(N) fSPEAK(N)
@@ -70,8 +68,7 @@ extern void fMPINIT();
 #define MPINIT() fMPINIT()
 extern void fSAVEIO(long,long,long*);
 #define SAVEIO(OP,IN,ARR) fSAVEIO(OP,IN,ARR)
-extern void fDATIME(long*,long*);
+#define DATIME(D,T) do {struct timespec ts; clock_gettime(CLOCK_REALTIME, &ts); D=ts.tv_sec, T=ts.tv_nsec;} while (0)
-#define DATIME(D,T) fDATIME(&D,&T)
 extern long fIABS(long);
 #define IABS(N) fIABS(N)
 extern long fMOD(long,long);