sysif.h: remove dependency on off_t.

The sysif.h header breaks on some systems because it
references off_t, which requires <sys/types.h>. But the off_t
materials in this header are unnecessary; we can remove
them.

* sysif.c (off_t_num, num_off_t): Extern functions become static,
and are wrapped with #if HAVE_FSEEKO.  These functions are
only called from sysif.c, only from code relying on fseeko.

* sysif.h (OFF_T_MAX, OFF_T_MIN): Macros not used anywhere are removed.
(off_t_num, num_off_t): Declarations removed.

2 files changed, 6 insertions, 14 deletions

diff --git a/sysif.c b/sysif.c
index 6d742b35..aa36c3a6 100644
--- a/sysif.c
+++ b/sysif.c
@@ -1492,7 +1492,9 @@ static val crypt_wrap(val wkey, val wsalt)
 
 #endif
 
-off_t off_t_num(val num, val self)
+#if HAVE_FSEEKO
+
+static off_t off_t_num(val num, val self)
 {
   switch (CHAR_BIT * sizeof(off_t)) {
   case 32:
@@ -1504,7 +1506,7 @@ off_t off_t_num(val num, val self)
   }
 }
 
-val num_off_t(off_t off)
+static val num_off_t(off_t off)
 {
   if (sizeof (off_t) <= sizeof (cnum)) {
     return num(off);
@@ -1517,6 +1519,8 @@ val num_off_t(off_t off)
   }
 }
 
+#endif
+
 val stdio_ftell(FILE *f)
 {
 #if HAVE_FSEEKO
diff --git a/sysif.h b/sysif.h
index 4556a752..c21ca969 100644
--- a/sysif.h
+++ b/sysif.h
@@ -35,16 +35,6 @@ extern val atime_s, mtime_s, ctime_s;
 extern val atime_nsec_s, mtime_nsec_s, ctime_nsec_s;
 extern val path_s;
 
-#if !HAVE_FTRUNCATE
-typedef long off_t;
-#define OFF_T_MAX LONG_MAX
-#define OFF_T_MIN LONG_MIN
-#else
-#define OFF_T_MAX ((((convert(off_t, 1) << \
-                      ((sizeof(off_t) * CHAR_BIT) - 2)) - 1) << 1) + 1)
-#define OFF_T_MIN (-OFF_T_MAX)
-#endif
-
 val errno_to_file_error(int err);
 val getenv_wrap(val name);
 val at_exit_call(val func);
@@ -61,8 +51,6 @@ val stat_to_struct(struct stat st, val path);
 #endif
 val statp(val path);
 val statf(val path);
-off_t off_t_num(val num, val self);
-val num_off_t(off_t offnum);
 val stdio_ftell(FILE *);
 int stdio_fseek(FILE *, val, int whence);
 #if HAVE_GETEUID