- trim any trailing whitespace

[uclinux-h8/uClibc.git] / libc / sysdeps / linux / common / ftruncate64.c

diff --git a/libc/sysdeps/linux/common/ftruncate64.c b/libc/sysdeps/linux/common/ftruncate64.c
index 01cdcd7..04cdc0a 100644 (file)
--- a/libc/sysdeps/linux/common/ftruncate64.c
+++ b/libc/sysdeps/linux/common/ftruncate64.c
@@ -1,41 +1,85 @@
 /*
+ * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ *
  * ftruncate64 syscall.  Copes with 64 bit and 32 bit machines
  * and on 32 bit machines this sends things into the kernel as
- * two 32-bit arguments (high and low 32 bits of length) that 
+ * two 32-bit arguments (high and low 32 bits of length) that
  * are ordered based on endianess.  It turns out endian.h has
  * just the macro we need to order things, __LONG_LONG_PAIR.
- *
- *  Copyright (C) 2002  Erik Andersen <andersen@codepoet.org>
- *
- * This file is subject to the terms and conditions of the GNU
- * Lesser General Public License.  See the file COPYING.LIB in
- * the main directory of this archive for more details.
  */
 
 #include <features.h>
-#include <unistd.h>
-#include <errno.h>
-#include <endian.h>
-#include <stdint.h>
-#include <sys/syscall.h>
-
-#if defined __UCLIBC_HAVE_LFS__ && defined __NR_ftruncate64
-#if __WORDSIZE == 64
+
+#ifdef __UCLIBC_HAS_LFS__
+
+# include <unistd.h>
+# include <errno.h>
+# include <endian.h>
+# include <stdint.h>
+# include <sys/types.h>
+# include <sys/syscall.h>
+
+libc_hidden_proto(ftruncate64)
+
+# ifdef __NR_ftruncate64
+
+#  if __WORDSIZE == 64
+
 /* For a 64 bit machine, life is simple... */
 _syscall2(int, ftruncate64, int, fd, __off64_t, length);
-#elif __WORDSIZE == 32
-#define __NR___ftruncate64 __NR_ftruncate64
-static inline _syscall3(int, __ftruncate64, int, fd, 
-       uint32_t, length_first_half, 
-       uint32_t, length_second_half);
+
+#  elif __WORDSIZE == 32
+
+#   ifndef INLINE_SYSCALL
+#    define INLINE_SYSCALL(name, nr, args...) __syscall_ftruncate64 (args)
+#    define __NR___syscall_ftruncate64 __NR_ftruncate64
+#    if defined(__UCLIBC_TRUNCATE64_HAS_4_ARGS__)
+static __inline__ _syscall4(int, __syscall_ftruncate64, int, fd, uint32_t, pad,
+       unsigned long, high_length, unsigned long, low_length);
+#    else
+static __inline__ _syscall3(int, __syscall_ftruncate64, int, fd,
+       unsigned long, high_length, unsigned long, low_length);
+#    endif
+#   endif
+
 /* The exported ftruncate64 function.  */
 int ftruncate64 (int fd, __off64_t length)
 {
     uint32_t low = length & 0xffffffff;
     uint32_t high = length >> 32;
-    return __ftruncate64(fd, __LONG_LONG_PAIR (high, low));
+#   if defined(__UCLIBC_TRUNCATE64_HAS_4_ARGS__)
+    return INLINE_SYSCALL(ftruncate64,
+           4, fd, 0, __LONG_LONG_PAIR (high, low));
+#   else
+    return INLINE_SYSCALL(ftruncate64, 3, fd,
+           __LONG_LONG_PAIR (high, low));
+#   endif
 }
-#else
-#error Your machine is not 64 bit or 32 bit, I am dazed and confused.
-#endif
-#endif /* __UCLIBC_HAVE_LFS__ */
+
+#  else /* __WORDSIZE */
+#   error Your machine is not 64 bit or 32 bit, I am dazed and confused.
+#  endif /* __WORDSIZE */
+
+# else  /* __NR_ftruncate64 */
+
+libc_hidden_proto(ftruncate)
+
+int ftruncate64 (int fd, __off64_t length)
+{
+       __off_t x = (__off_t) length;
+
+       if (x == length) {
+               return ftruncate(fd, x);
+       }
+
+       __set_errno((x < 0) ? EINVAL : EFBIG);
+
+       return -1;
+}
+
+# endif /* __NR_ftruncate64 */
+libc_hidden_def(ftruncate64)
+
+#endif /* __UCLIBC_HAS_LFS__ */