From 824c295c7aebba96d28f8aaa9da317eca3e2225f Mon Sep 17 00:00:00 2001
From: Martin Mares <mj@ucw.cz>
Date: Sun, 24 Oct 1999 19:58:22 +0000
Subject: [PATCH] Large File Support.

---
 lib/config.h | 22 +++++++++++++++++++++-
 lib/lfs.h    | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 71 insertions(+), 1 deletion(-)
 create mode 100644 lib/lfs.h

diff --git a/lib/config.h b/lib/config.h
index 171211c6..50bf986a 100644
--- a/lib/config.h
+++ b/lib/config.h
@@ -9,7 +9,13 @@
 
 /* Version */
 
-#define SHER_VER "1.2"
+#define SHER_VER "1.3"
+
+/* Features */
+
+#define SHERLOCK_CONFIG_REF_WEIGHTS
+#undef SHERLOCK_CONFIG_LARGE_DB
+#undef SHERLOCK_CONFIG_LFS
 
 /* Types */
 
@@ -32,6 +38,20 @@ typedef unsigned long addr_int_t;	/* Both integer and address */
 
 typedef u32 oid_t;			/* Object ID */
 
+#ifdef SHERLOCK_CONFIG_LFS		/* off_t as passed to file functions */
+typedef s64 sh_off_t;
+#define BYTES_PER_FILE_POINTER 5
+#else
+typedef int sh_off_t;
+#define BYTES_PER_FILE_POINTER 4
+#endif
+
+#ifdef SHERLOCK_CONFIG_LARGE_DB		/* off_t as present in database files */
+typedef s64 sh_foff_t;
+#else
+typedef s32 sh_foff_t;
+#endif
+
 /* CPU characteristics */
 
 #define CPU_LITTLE_ENDIAN
diff --git a/lib/lfs.h b/lib/lfs.h
new file mode 100644
index 00000000..ab9d8e71
--- /dev/null
+++ b/lib/lfs.h
@@ -0,0 +1,50 @@
+/*
+ *	Sherlock Library -- Large File Support
+ *
+ *	(c) 1999 Martin Mares, <mj@atrey.karlin.mff.cuni.cz>
+ */
+
+#ifndef _SHERLOCK_LFS_H
+#define _SHERLOCK_LFS_H
+
+#ifdef SHERLOCK_CONFIG_LFS
+
+#ifndef O_LARGEFILE
+#if defined(__linux__) && defined(__i386__)
+#define O_LARGEFILE 0100000
+#else
+#error O_LARGEFILE unknown
+#endif
+#endif
+
+#if 0
+
+/* A "do it yourself" solution */
+
+#include <asm/unistd.h>
+#include <errno.h>
+
+_syscall5(int, _llseek, int, fd, int, hi, int, lo, loff_t *, result, int, whence);
+
+extern inline loff_t sh_seek(int fd, sh_off_t pos, int whence)
+{
+  loff_t result;
+  int err;
+
+  err = _llseek(fd, pos >> 32, pos, &result, whence);
+  return (err < 0) ? err : result;
+}
+#else
+
+/* Touching hidden places in glibc */
+extern loff_t llseek(int fd, loff_t pos, int whence);
+#define sh_seek(f,o,w) llseek(f,o,w)
+
+#endif
+
+#else	/* !SHERLOCK_CONFIG_LFS */
+
+#define sh_seek(f,o,w) lseek(f,o,w)
+
+#endif	/* !SHERLOCK_CONFIG_LFS */
+#endif	/* !_SHERLOCK_LFS_H */
-- 
2.39.5