/* UI_FILE - a generic STDIO like output stream.
- Copyright (C) 1999, 2000, 2001, 2002, 2007, 2008, 2009, 2010, 2011
- Free Software Foundation, Inc.
+ Copyright (C) 1999-2014 Free Software Foundation, Inc.
This file is part of GDB.
#include "defs.h"
#include "ui-file.h"
#include "gdb_obstack.h"
-#include "gdb_string.h"
#include "gdb_select.h"
-
-#include <errno.h>
+#include "filestuff.h"
static ui_file_isatty_ftype null_file_isatty;
static ui_file_write_ftype null_file_write;
static ui_file_delete_ftype null_file_delete;
static ui_file_rewind_ftype null_file_rewind;
static ui_file_put_ftype null_file_put;
+static ui_file_fseek_ftype null_file_fseek;
struct ui_file
{
ui_file_isatty_ftype *to_isatty;
ui_file_rewind_ftype *to_rewind;
ui_file_put_ftype *to_put;
+ ui_file_fseek_ftype *to_fseek;
void *to_data;
};
int ui_file_magic;
set_ui_file_isatty (file, null_file_isatty);
set_ui_file_rewind (file, null_file_rewind);
set_ui_file_put (file, null_file_put);
+ set_ui_file_fseek (file, null_file_fseek);
return file;
}
return;
}
+static int
+null_file_fseek (struct ui_file *stream, long offset, int whence)
+{
+ errno = EBADF;
+
+ return -1;
+}
+
void *
ui_file_data (struct ui_file *file)
{
return file->to_read (file, buf, length_buf);
}
+int
+ui_file_fseek (struct ui_file *file, long offset, int whence)
+{
+ return file->to_fseek (file, offset, whence);
+}
+
void
fputs_unfiltered (const char *buf, struct ui_file *file)
{
}
void
-set_ui_file_flush (struct ui_file *file, ui_file_flush_ftype *flush)
+set_ui_file_flush (struct ui_file *file, ui_file_flush_ftype *flush_ptr)
{
- file->to_flush = flush;
+ file->to_flush = flush_ptr;
}
void
-set_ui_file_isatty (struct ui_file *file, ui_file_isatty_ftype *isatty)
+set_ui_file_isatty (struct ui_file *file, ui_file_isatty_ftype *isatty_ptr)
{
- file->to_isatty = isatty;
+ file->to_isatty = isatty_ptr;
}
void
-set_ui_file_rewind (struct ui_file *file, ui_file_rewind_ftype *rewind)
+set_ui_file_rewind (struct ui_file *file, ui_file_rewind_ftype *rewind_ptr)
{
- file->to_rewind = rewind;
+ file->to_rewind = rewind_ptr;
}
void
-set_ui_file_put (struct ui_file *file, ui_file_put_ftype *put)
+set_ui_file_put (struct ui_file *file, ui_file_put_ftype *put_ptr)
{
- file->to_put = put;
+ file->to_put = put_ptr;
}
void
set_ui_file_write (struct ui_file *file,
- ui_file_write_ftype *write)
+ ui_file_write_ftype *write_ptr)
{
- file->to_write = write;
+ file->to_write = write_ptr;
}
void
set_ui_file_write_async_safe (struct ui_file *file,
- ui_file_write_async_safe_ftype *write_async_safe)
+ ui_file_write_async_safe_ftype *write_async_safe_ptr)
{
- file->to_write_async_safe = write_async_safe;
+ file->to_write_async_safe = write_async_safe_ptr;
}
void
-set_ui_file_read (struct ui_file *file, ui_file_read_ftype *read)
+set_ui_file_read (struct ui_file *file, ui_file_read_ftype *read_ptr)
{
- file->to_read = read;
+ file->to_read = read_ptr;
}
void
-set_ui_file_fputs (struct ui_file *file, ui_file_fputs_ftype *fputs)
+set_ui_file_fputs (struct ui_file *file, ui_file_fputs_ftype *fputs_ptr)
{
- file->to_fputs = fputs;
+ file->to_fputs = fputs_ptr;
+}
+
+void
+set_ui_file_fseek (struct ui_file *file, ui_file_fseek_ftype *fseek_ptr)
+{
+ file->to_fseek = fseek_ptr;
}
void
set_ui_file_data (struct ui_file *file, void *data,
- ui_file_delete_ftype *delete)
+ ui_file_delete_ftype *delete_ptr)
{
file->to_data = data;
- file->to_delete = delete;
+ file->to_delete = delete_ptr;
}
/* ui_file utility function for converting a ``struct ui_file'' into
static struct ui_file *
mem_file_new (void)
{
- struct mem_file *stream = XMALLOC (struct mem_file);
+ struct mem_file *stream = XNEW (struct mem_file);
struct ui_file *file = ui_file_new ();
set_ui_file_data (file, stream, mem_file_delete);
static ui_file_delete_ftype stdio_file_delete;
static struct ui_file *stdio_file_new (FILE *file, int close_p);
static ui_file_flush_ftype stdio_file_flush;
+static ui_file_fseek_ftype stdio_file_fseek;
static int stdio_file_magic;
set_ui_file_fputs (ui_file, stdio_file_fputs);
set_ui_file_read (ui_file, stdio_file_read);
set_ui_file_isatty (ui_file, stdio_file_isatty);
+ set_ui_file_fseek (ui_file, stdio_file_fseek);
return ui_file;
}
_("stdio_file_write: bad magic number"));
/* Calling error crashes when we are called from the exception framework. */
if (fwrite (buf, length_buf, 1, stdio->file))
- ;
+ {
+ /* Nothing. */
+ }
}
static void
return;
}
- write (stdio->fd, buf, length_buf);
+ /* This is written the way it is to avoid a warning from gcc about not using the
+ result of write (since it can be declared with attribute warn_unused_result).
+ Alas casting to void doesn't work for this. */
+ if (write (stdio->fd, buf, length_buf))
+ {
+ /* Nothing. */
+ }
}
static void
_("stdio_file_fputs: bad magic number"));
/* Calling error crashes when we are called from the exception framework. */
if (fputs (linebuffer, stdio->file))
- ;
+ {
+ /* Nothing. */
+ }
}
static int
return (isatty (stdio->fd));
}
+static int
+stdio_file_fseek (struct ui_file *file, long offset, int whence)
+{
+ struct stdio_file *stdio = ui_file_data (file);
+
+ if (stdio->magic != &stdio_file_magic)
+ internal_error (__FILE__, __LINE__,
+ _("stdio_file_fseek: bad magic number"));
+
+ return fseek (stdio->file, offset, whence);
+}
+
+#ifdef __MINGW32__
+/* This is the implementation of ui_file method to_write for stderr.
+ gdb_stdout is flushed before writing to gdb_stderr. */
+
+static void
+stderr_file_write (struct ui_file *file, const char *buf, long length_buf)
+{
+ gdb_flush (gdb_stdout);
+ stdio_file_write (file, buf, length_buf);
+}
+
+/* This is the implementation of ui_file method to_fputs for stderr.
+ gdb_stdout is flushed before writing to gdb_stderr. */
+
+static void
+stderr_file_fputs (const char *linebuffer, struct ui_file *file)
+{
+ gdb_flush (gdb_stdout);
+ stdio_file_fputs (linebuffer, file);
+}
+#endif
+
+struct ui_file *
+stderr_fileopen (void)
+{
+ struct ui_file *ui_file = stdio_fileopen (stderr);
+
+#ifdef __MINGW32__
+ /* There is no real line-buffering on Windows, see
+ http://msdn.microsoft.com/en-us/library/86cebhfs%28v=vs.71%29.aspx
+ so the stdout is either fully-buffered or non-buffered. We can't
+ make stdout non-buffered, because of two concerns,
+ 1. non-buffering hurts performance,
+ 2. non-buffering may change GDB's behavior when it is interacting
+ with front-end, such as Emacs.
+
+ We decided to leave stdout as fully buffered, but flush it first
+ when something is written to stderr. */
+
+ /* Method 'to_write_async_safe' is not overwritten, because there's
+ no way to flush a stream in an async-safe manner. Fortunately,
+ it doesn't really matter, because:
+ - that method is only used for printing internal debug output
+ from signal handlers.
+ - Windows hosts don't have a concept of async-safeness. Signal
+ handlers run in a separate thread, so they can call
+ the regular non-async-safe output routines freely. */
+ set_ui_file_write (ui_file, stderr_file_write);
+ set_ui_file_fputs (ui_file, stderr_file_fputs);
+#endif
+
+ return ui_file;
+}
+
/* Like fdopen(). Create a ui_file from a previously opened FILE. */
struct ui_file *
}
struct ui_file *
-gdb_fopen (char *name, char *mode)
+gdb_fopen (const char *name, const char *mode)
{
- FILE *f = fopen (name, mode);
+ FILE *f = gdb_fopen_cloexec (name, mode);
if (f == NULL)
return NULL;
projects / platform / upstream / binutils.git / blobdiff