1 files changed, 48 insertions, 15 deletions

diff --git a/libgfortran/io/unix.c b/libgfortran/io/unix.c
index 8b32475..07aa4d9 100644
--- a/libgfortran/io/unix.c
+++ b/libgfortran/io/unix.c
@@ -47,6 +47,8 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 #define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 
+#define lseek _lseeki64
+
 static uint64_t
 id_from_handle (HANDLE hFile)
 {
@@ -274,22 +276,53 @@ raw_write (unix_stream * s, const void * buf, ssize_t nbyte)
   return nbyte - bytes_left;
 }
 
-static off_t
-raw_seek (unix_stream * s, off_t offset, int whence)
+static gfc_offset
+raw_seek (unix_stream * s, gfc_offset offset, int whence)
 {
   return lseek (s->fd, offset, whence);
 }
 
-static off_t
+static gfc_offset
 raw_tell (unix_stream * s)
 {
   return lseek (s->fd, 0, SEEK_CUR);
 }
 
 static int
-raw_truncate (unix_stream * s, off_t length)
+raw_truncate (unix_stream * s, gfc_offset length)
 {
-#ifdef HAVE_FTRUNCATE
+#ifdef __MINGW32__
+  HANDLE h;
+  gfc_offset cur;
+
+  if (isatty (s->fd))
+    {
+      errno = EBADF;
+      return -1;
+    }
+  h = _get_osfhandle (s->fd);
+  if (h == INVALID_HANDLE_VALUE)
+    {
+      errno = EBADF;
+      return -1;
+    }
+  cur = lseek (s->fd, 0, SEEK_CUR);
+  if (cur == -1)
+    return -1;
+  if (lseek (s->fd, length, SEEK_SET) == -1)
+    goto error;
+  if (!SetEndOfFile (h))
+    {
+      errno = EBADF;
+      goto error;
+    }
+  if (lseek (s->fd, cur, SEEK_SET) == -1)
+    return -1;
+  return 0;
+ error:
+  lseek (s->fd, cur, SEEK_SET);
+  return -1;
+#elif defined HAVE_FTRUNCATE
   return ftruncate (s->fd, length);
 #elif defined HAVE_CHSIZE
   return chsize (s->fd, length);
@@ -470,8 +503,8 @@ buf_write (unix_stream * s, const void * buf, ssize_t nbyte)
   return nbyte;
 }
 
-static off_t
-buf_seek (unix_stream * s, off_t offset, int whence)
+static gfc_offset
+buf_seek (unix_stream * s, gfc_offset offset, int whence)
 {
   switch (whence)
     {
@@ -495,14 +528,14 @@ buf_seek (unix_stream * s, off_t offset, int whence)
   return offset;
 }
 
-static off_t
+static gfc_offset
 buf_tell (unix_stream * s)
 {
   return s->logical_offset;
 }
 
 static int
-buf_truncate (unix_stream * s, off_t length)
+buf_truncate (unix_stream * s, gfc_offset length)
 {
   int r;
 
@@ -631,8 +664,8 @@ mem_write (stream * s, const void * buf, ssize_t nbytes)
 }
 
 
-static off_t
-mem_seek (stream * strm, off_t offset, int whence)
+static gfc_offset
+mem_seek (stream * strm, gfc_offset offset, int whence)
 {
   unix_stream * s = (unix_stream *) strm;
   switch (whence)
@@ -668,7 +701,7 @@ mem_seek (stream * strm, off_t offset, int whence)
 }
 
 
-static off_t
+static gfc_offset
 mem_tell (stream * s)
 {
   return ((unix_stream *)s)->logical_offset;
@@ -677,7 +710,7 @@ mem_tell (stream * s)
 
 static int
 mem_truncate (unix_stream * s __attribute__ ((unused)), 
-	      off_t length __attribute__ ((unused)))
+	      gfc_offset length __attribute__ ((unused)))
 {
   return 0;
 }
@@ -764,7 +797,7 @@ fd_to_stream (int fd, int prot)
 
   fstat (fd, &statbuf);
 
-  if (lseek (fd, 0, SEEK_CUR) == (off_t) -1)
+  if (lseek (fd, 0, SEEK_CUR) == (gfc_offset) -1)
     s->file_length = -1;
   else
     s->file_length = S_ISREG (statbuf.st_mode) ? statbuf.st_size : -1;
@@ -1602,7 +1635,7 @@ inquire_readwrite (const char *string, int len)
 gfc_offset
 file_length (stream * s)
 {
-  off_t curr, end;
+  gfc_offset curr, end;
   if (!is_seekable (s))
     return -1;
   curr = stell (s);