From 50ab7b9d47ffefaf3d526c50b34fda9280823937 Mon Sep 17 00:00:00 2001
From: "Eric S. Raymond" <esr@thyrsus.com>
Date: Thu, 16 Feb 2017 13:14:57 -0500
Subject: [PATCH] Minimal forward-port to modern C - just enough to get it to
 compile.

---
 Makefile   |  3 +++
 actions1.c |  2 +-
 init.c     | 26 ++++++++++++++++----------
 main.c     |  9 ++++++---
 4 files changed, 26 insertions(+), 14 deletions(-)

diff --git a/Makefile b/Makefile
index 1b88b81..499ff70 100644
--- a/Makefile
+++ b/Makefile
@@ -21,3 +21,6 @@ actions2.o:	misc.h main.h share.h funcs.h
 score.o:	misc.h main.h share.h
 
 misc.o:		misc.h main.h
+
+clean:
+	rm -f *.o adventure
diff --git a/actions1.c b/actions1.c
index 57e8cb1..464faff 100644
--- a/actions1.c
+++ b/actions1.c
@@ -17,7 +17,7 @@ extern carry(), discard(long), attack(), throw(), feed(), fill();
 /*  ANALYSE A VERB.  REMEMBER WHAT IT WAS, GO BACK FOR OBJECT IF SECOND WORD
  *  UNLESS VERB IS "SAY", WHICH SNARFS ARBITRARY SECOND WORD. */
 
-action(STARTAT)long STARTAT; {
+int action(STARTAT)long STARTAT; {
 	switch(STARTAT) {
 	   case 4000: goto L4000;
 	   case 4090: goto L4090;
diff --git a/init.c b/init.c
index 6b2edea..2ded06d 100644
--- a/init.c
+++ b/init.c
@@ -3,6 +3,7 @@
 #include "share.h"
 #include "funcs.h"
 #include <stdio.h>
+#include <stdbool.h>
 
 #define TRUE  (0==0)
 #define FALSE (0!=0)
@@ -164,13 +165,20 @@
  *	%B = VARIABLE NUMBER OF BLANKS
  *	%! = THE ENTIRE MESSAGE SHOULD BE SUPPRESSED */
 
-initialise() {
+static bool quick_init(void);
+static int raw_init(void);
+static void report(void);
+static void quick_save(void);
+static int finish_init(void);
+static void quick_io(void);
+
+void initialise() {
 	printf("Initialising...\n");
 	if(!quick_init()){raw_init(); report(); quick_save();}
 	finish_init();
 }
 
-static raw_init() {
+static int raw_init(void) {
 	printf("Couldn't find adventure.data, using adventure.text...\n");
 
 /*  CLEAR OUT THE VARIOUS TEXT-POINTER ARRAYS.  ALL TEXT IS STORED IN ARRAY
@@ -366,7 +374,7 @@ L1092:	LOCSND[K]=KK;
  *  CORRECT LINK TO USE.)  ABB IS ZEROED; IT CONTROLS WHETHER THE ABBREVIATED
  *  DESCRIPTION IS PRINTED.  COUNTS MOD 5 UNLESS "LOOK" IS USED. */
 
-static finish_init() {
+static int finish_init(void) {
 	/* 1101 */ for (I=1; I<=100; I++) {
 	PLACE[I]=0;
 	PROP[I]=0;
@@ -590,7 +598,7 @@ L1800:	{long x = 2*I+81; if(RTEXT[x] != 0)MAXDIE=I+1;}
 
 /*  REPORT ON AMOUNT OF ARRAYS ACTUALLY USED, TO PERMIT REDUCTIONS. */
 
-static report() {
+static void report(void) {
 	/* 1998 */ for (K=1; K<=LOCSIZ; K++) {
 	KK=LOCSIZ+1-K;
 	if(LTEXT[KK] != 0) goto L1997;
@@ -632,7 +640,7 @@ static FILE *f;
 static void quick_item(long*);
 static void quick_array(long*, long);
 
-static quick_init() {
+static bool quick_init(void) {
 #ifdef AMIGA
 	f = fopen("ram:adventure.data", READ_MODE);
 #else
@@ -652,19 +660,18 @@ static quick_init() {
 	return(init_cksum == 0);
 }
 
-static quick_save() {
+static void quick_save(void) {
 	printf("Writing adventure.data...\n");
 	f = fopen("adventure.data",WRITE_MODE);
-	if(f == NULL){printf("Can't open file!\n"); return(0);}
+	if(f == NULL){printf("Can't open file!\n"); return;}
 	init_reading = FALSE;
 	init_cksum = 1;
 	quick_io();
 	fwrite(&init_cksum,4,1,f);
 	fclose(f);
-	return(0);
 }
 
-static quick_io() {
+static void quick_io(void) {
 	quick_item(&LINUSE);
 	quick_item(&TRVS);
 	quick_item(&CLSSES);
@@ -692,7 +699,6 @@ static quick_io() {
 	quick_array(FIXD,100);
 	quick_array(ACTSPK,VRBSIZ);
 	quick_array((long *)HINTS,(HNTMAX+1)*5-1);
-	return(0);
 }
 
 static void quick_item(W)long *W; {
diff --git a/main.c b/main.c
index 6977bc5..0f11fd4 100644
--- a/main.c
+++ b/main.c
@@ -1,3 +1,6 @@
+#include <stdlib.h>
+#include <stdio.h>
+
 #include "misc.h"
 #ifdef __MSDOS__
 #include "alloc.h"
@@ -35,15 +38,15 @@ long ABBNUM, ACTSPK[36], AMBER, ATTACK, AXE, BACK, BATTER, BEAR, BIRD, BLOOD, BO
 		VOLCAN, VRBSIZ = 35, VRSION = 25, WATER, WD1, WD1X, WD2, WD2X,
 		WZDARK = FALSE, ZZWORD;
 
-extern initialise();
+extern void initialise();
 extern void score(long);
-extern action(long);
+extern int action(long);
 
 /*
  * MAIN PROGRAM
  */
 
-main() {
+int main() {
 
 /*  ADVENTURE (REV 2: 20 TREASURES) */
 
-- 
2.31.1