From adce0147e0ace91493db19529a6050777b1ec360 Mon Sep 17 00:00:00 2001
From: nhmall <nhmall@nethack.org>
Date: Sun, 23 Jun 2019 00:47:30 -0400
Subject: [PATCH] missed one file

---
 src/sfstruct.c | 271 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 271 insertions(+)
 create mode 100644 src/sfstruct.c

diff --git a/src/sfstruct.c b/src/sfstruct.c
new file mode 100644
index 000000000..1da4b465e
--- /dev/null
+++ b/src/sfstruct.c
@@ -0,0 +1,271 @@
+/* NetHack 3.7	sfstruct.c	$NHDT-Date: 1559994625 2019/06/08 11:50:25 $  $NHDT-Branch: NetHack-3.6 $:$NHDT-Revision: 1.121 $ */
+/* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
+/*-Copyright (c) Michael Allison, 2009. */
+/* NetHack may be freely redistributed.  See license for details. */
+
+#include "hack.h"
+
+#ifdef TRACE_BUFFERING
+#ifdef bufon
+#undef bufon
+#endif
+#ifdef bufoff
+#undef bufoff
+#endif
+#ifdef bflush
+#undef bflush
+#endif
+#ifdef bwrite
+#undef bwrite
+#endif
+#ifdef bclose
+#undef bclose
+#endif
+#ifdef mread
+#undef mread
+#endif
+#ifdef minit
+#undef minit
+#endif
+void FDECL(newread, (NHFILE *, int, int, genericptr_t, unsigned int));
+void FDECL(bufon, (int));
+void FDECL(bufoff, (int));
+void FDECL(bflush, (int));
+void FDECL(bwrite, (int, genericptr_t, unsigned int));
+void FDECL(mread, (int, genericptr_t, unsigned int));
+void NDECL(minit);
+void FDECL(bclose, (int));
+#endif /* TRACE_BUFFERING */
+
+#if defined(UNIX) || defined(WIN32)
+#define USE_BUFFERING
+#endif
+
+/*
+ * historical structlevel savefile writing and reading routines follow.
+ * These were moved here from save.c and restore.c between 3.6.3 and 3.7.0.
+ */
+
+struct restore_info restoreinfo = {
+	"externalcomp", 0,
+};
+
+
+static int bw_fd = -1;
+static FILE *bw_FILE = 0;
+static boolean buffering = FALSE;
+
+void
+bufon(fd)
+    int fd;
+{
+#ifdef USE_BUFFERING
+    if(bw_fd != fd) {
+        if(bw_fd >= 0)
+            panic("double buffering unexpected");
+        bw_fd = fd;
+        if((bw_FILE = fdopen(fd, "w")) == 0)
+            panic("buffering of file %d failed", fd);
+    }
+#endif
+    buffering = TRUE;
+}
+
+void
+bufoff(fd)
+int fd;
+{
+    bflush(fd);
+    buffering = FALSE;
+}
+
+void
+bwrite(fd, loc, num)
+register int fd;
+register genericptr_t loc;
+register unsigned num;
+{
+    boolean failed;
+
+#ifdef MFLOPPY
+    bytes_counted += num;
+    if (count_only)
+        return;
+#endif
+
+#ifdef USE_BUFFERING
+    if (buffering) {
+        if (fd != bw_fd)
+            panic("unbuffered write to fd %d (!= %d)", fd, bw_fd);
+
+        failed = (fwrite(loc, (int) num, 1, bw_FILE) != 1);
+    } else
+#endif /* USE_BUFFERING */
+    {
+        /* lint wants 3rd arg of write to be an int; lint -p an unsigned */
+#if defined(BSD) || defined(ULTRIX) || defined(WIN32) || defined(_MSC_VER)
+        failed = ((long) write(fd, loc, (int) num) != (long) num);
+#else /* e.g. SYSV, __TURBOC__ */
+        failed = ((long) write(fd, loc, num) != (long) num);
+#endif
+    }
+
+    if (failed) {
+#if defined(UNIX) || defined(VMS) || defined(__EMX__)
+        if (g.program_state.done_hup)
+            nh_terminate(EXIT_FAILURE);
+        else
+#endif
+            panic("cannot write %u bytes to file #%d", num, fd);
+    }
+}
+
+void
+bflush(fd)
+int fd;
+{
+#ifdef USE_BUFFERING
+    if (fd == bw_fd) {
+        if (fflush(bw_FILE) == EOF)
+            panic("flush of savefile failed!");
+    }
+#endif
+    return;
+}
+
+void
+bclose(fd)
+int fd;
+{
+    bufoff(fd);
+#ifdef USE_BUFFERING
+    if (fd == bw_fd) {
+        (void) fclose(bw_FILE);
+        bw_fd = -1;
+        bw_FILE = 0;
+    } else
+#endif
+        (void) nhclose(fd);
+    return;
+}
+
+void
+minit()
+{
+    return;
+}
+
+void
+mread(fd, buf, len)
+register int fd;
+register genericptr_t buf;
+register unsigned int len;
+{
+    register int rlen;
+#if defined(BSD) || defined(ULTRIX)
+#define readLenType int
+#else /* e.g. SYSV, __TURBOC__ */
+#define readLenType unsigned
+#endif
+
+    rlen = read(fd, buf, (readLenType) len);
+    if ((readLenType) rlen != (readLenType) len) {
+        if (restoreinfo.mread_flags == 1) { /* means "return anyway" */
+            restoreinfo.mread_flags = -1;
+            return;
+        } else {
+            pline("Read %d instead of %u bytes.", rlen, len);
+            if (g.restoring) {
+                (void) nhclose(fd);
+                (void) delete_savefile();
+                error("Error restoring old game.");
+            }
+            panic("Error reading level file.");
+        }
+    }
+}
+
+#ifdef TRACE_BUFFERING
+
+static FILE *tracefile;
+#define TFILE "trace-buffering.log"
+
+#define TRACE(xx) \
+    tracefile = fopen(TFILE, "a"); \
+    (void) fprintf(tracefile, "%s from %s:%d (%d)\n", __FUNCTION__, fncname, linenum, xx); \
+    fclose(tracefile);
+
+void
+Bufon(fd, fncname, linenum)
+int fd;
+const char *fncname;
+int linenum;
+{
+    TRACE(fd);    
+    bufon(fd);
+}
+
+void
+Bufoff(fd, fncname, linenum)
+int fd;
+const char *fncname;
+int linenum;
+{
+    TRACE(fd);    
+    bufoff(fd);
+}
+
+void
+Bflush(fd, fncname, linenum)
+int fd;
+const char *fncname;
+int linenum;
+{
+    TRACE(fd);    
+    bflush(fd);
+}
+
+void
+Bwrite(fd, loc, num, fncname, linenum)
+register int fd;
+register genericptr_t loc;
+register unsigned num;
+const char *fncname;
+int linenum;
+{
+    TRACE(fd);    
+    bwrite(fd, loc, num);
+}
+
+void
+Bclose(fd, fncname, linenum)
+int fd;
+const char *fncname;
+int linenum;
+{
+    TRACE(fd);    
+    bclose(fd);
+}
+
+void
+Minit(fncname, linenum)
+const char *fncname;
+int linenum;
+{
+    TRACE(-1);
+    minit();
+}
+
+void
+Mread(fd, buf, len, fncname, linenum)
+register int fd;
+register genericptr_t buf;
+register unsigned int len;
+const char *fncname;
+int linenum;
+{
+    TRACE(fd);    
+    mread(fd, buf, len);
+}
+#endif
+