PR libfortran/40812 Large file support for MinGW

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@154984 138bc75d-0d04-0410-961f-82ee72b054a4

4 files changed, 83 insertions, 22 deletions

diff --git a/libgfortran/ChangeLog b/libgfortran/ChangeLog
index 68bf89705d6..280ac230a7d 100644
--- a/libgfortran/ChangeLog
+++ b/libgfortran/ChangeLog
@@ -1,3 +1,26 @@
+2009-12-04  Janne Blomqvist  <jb@gcc.gnu.org>
+
+	PR libfortran/40812
+	* libgfortran.h: typedef gfc_offset differently for MinGW.
+	* io/unix.h (struct stream): Change function pointers to use
+	gfc_offset instead of off_t.
+	(sseek): Change prototype to use gfc_offset instead of off_t.
+	(stell): Likewise.
+	(struncate): Likewise.
+	* io/unix.c: Redefine lseek() for mingw.
+	(raw_seek): Use gfc_offset instead of off_t.
+	(raw_tell): Likewise.
+	(buf_seek): Likewise.
+	(buf_tell): Likewise.
+	(buf_truncate): Likewise.
+	(mem_seek): Likewise.
+	(mem_tell): Likewise.
+	(mem_truncate): Likewise.
+	(fd_to_stream): Likewise.
+	(file_length): Likewise.
+	(raw_truncate): Use gfc_offset instead of off_t, add large file
+	capable implementation for MinGW.
+
 2009-11-30  Janus Weil  <janus@gcc.gnu.org>
 
 	* gfortran.map: Add _gfortran_is_extension_of.
diff --git a/libgfortran/io/unix.c b/libgfortran/io/unix.c
index 8b324759a73..07aa4d95972 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);
diff --git a/libgfortran/io/unix.h b/libgfortran/io/unix.h
index f0f0712457a..e691982e505 100644
--- a/libgfortran/io/unix.h
+++ b/libgfortran/io/unix.h
@@ -33,10 +33,10 @@ struct stream
 {
   ssize_t (*read) (struct stream *, void *, ssize_t);
   ssize_t (*write) (struct stream *, const void *, ssize_t);
-  off_t (*seek) (struct stream *, off_t, int);
-  off_t (*tell) (struct stream *);
+  gfc_offset (*seek) (struct stream *, gfc_offset, int);
+  gfc_offset (*tell) (struct stream *);
   /* Avoid keyword truncate due to AIX namespace collision.  */
-  int (*trunc) (struct stream *, off_t);
+  int (*trunc) (struct stream *, gfc_offset);
   int (*flush) (struct stream *);
   int (*close) (struct stream *);
 };
@@ -54,20 +54,20 @@ swrite (stream * s, const void * buf, ssize_t nbyte)
   return s->write (s, buf, nbyte);
 }
 
-static inline off_t
-sseek (stream * s, off_t offset, int whence)
+static inline gfc_offset
+sseek (stream * s, gfc_offset offset, int whence)
 {
   return s->seek (s, offset, whence);
 }
 
-static inline off_t
+static inline gfc_offset
 stell (stream * s)
 {
   return s->tell (s);
 }
 
 static inline int
-struncate (stream * s, off_t length)
+struncate (stream * s, gfc_offset length)
 {
   return s->trunc (s, length);
 }
diff --git a/libgfortran/libgfortran.h b/libgfortran/libgfortran.h
index bba95f7c781..dd63fa4e616 100644
--- a/libgfortran/libgfortran.h
+++ b/libgfortran/libgfortran.h
@@ -56,7 +56,12 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 #if HAVE_SYS_TYPES_H
 #include <sys/types.h>
 #endif
+
+#ifdef __MINGW32__
+typedef off64_t gfc_offset;
+#else
 typedef off_t gfc_offset;
+#endif
 
 #ifndef NULL
 #define NULL (void *) 0