import gdb-2000-02-01 snapshot

1 files changed, 511 insertions, 0 deletions

diff --git a/gdb/ui-file.c b/gdb/ui-file.c
new file mode 100644
index 0000000..d077009
--- /dev/null
+++ b/gdb/ui-file.c
@@ -0,0 +1,511 @@
+/* UI_FILE - a generic STDIO like output stream.
+   Copyright (C) 1999, 2000 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+/* Implement the ``struct ui_file'' object. */
+
+#include "defs.h"
+#include "ui-file.h"
+
+#undef XMALLOC
+#define XMALLOC(TYPE) ((TYPE*) xmalloc (sizeof (TYPE)))
+
+static ui_file_isatty_ftype null_file_isatty;
+static ui_file_write_ftype null_file_write;
+static ui_file_fputs_ftype null_file_fputs;
+static ui_file_flush_ftype null_file_flush;
+static ui_file_delete_ftype null_file_delete;
+static ui_file_rewind_ftype null_file_rewind;
+static ui_file_put_ftype null_file_put;
+
+struct ui_file
+  {
+    int *magic;
+    ui_file_flush_ftype *to_flush;
+    ui_file_write_ftype *to_write;
+    ui_file_fputs_ftype *to_fputs;
+    ui_file_delete_ftype *to_delete;
+    ui_file_isatty_ftype *to_isatty;
+    ui_file_rewind_ftype *to_rewind;
+    ui_file_put_ftype *to_put;
+    void *to_data;
+  };
+int ui_file_magic;
+
+struct ui_file *
+ui_file_new ()
+{
+  struct ui_file *file = xmalloc (sizeof (struct ui_file));
+  file->magic = &ui_file_magic;
+  set_ui_file_data (file, NULL, null_file_delete);
+  set_ui_file_flush (file, null_file_flush);
+  set_ui_file_write (file, null_file_write);
+  set_ui_file_fputs (file, null_file_fputs);
+  set_ui_file_isatty (file, null_file_isatty);
+  set_ui_file_rewind (file, null_file_rewind);
+  set_ui_file_put (file, null_file_put);
+  return file;
+}
+
+void
+ui_file_delete (file)
+     struct ui_file *file;
+{
+  file->to_delete (file);
+  free (file);
+}
+
+static int
+null_file_isatty (file)
+     struct ui_file *file;
+{
+  return 0;
+}
+
+static void
+null_file_rewind (file)
+     struct ui_file *file;
+{
+  return;
+}
+
+static void
+null_file_put (struct ui_file *file,
+	       ui_file_put_method_ftype *write,
+	       void *dest)
+{
+  return;
+}
+
+static void
+null_file_flush (file)
+     struct ui_file *file;
+{
+  return;
+}
+
+static void
+null_file_write (struct ui_file *file,
+		 const char *buf,
+		 long sizeof_buf)
+{
+  if (file->to_fputs == null_file_fputs)
+    /* Both the write and fputs methods are null. Discard the
+       request. */
+    return;
+  else
+    {
+      /* The fputs method isn't null, slowly pass the write request
+         onto that.  FYI, this isn't as bad as it may look - the
+         current (as of 1999-11-07) printf_* function calls fputc and
+         fputc does exactly the below.  By having a write function it
+         is possible to clean up that code.  */
+      int i;
+      char b[2];
+      b[1] = '\0';
+      for (i = 0; i < sizeof_buf; i++)
+	{
+	  b[0] = buf[i];
+	  file->to_fputs (b, file);
+	}
+      return;
+    }
+}
+
+static void
+null_file_fputs (buf, file)
+     const char *buf;
+     struct ui_file *file;
+{
+  if (file->to_write == null_file_write)
+    /* Both the write and fputs methods are null. Discard the
+       request. */
+    return;
+  else
+    {
+      /* The write method was implemented, use that. */
+      file->to_write (file, buf, strlen (buf));
+    }
+}
+
+static void
+null_file_delete (file)
+     struct ui_file *file;
+{
+  return;
+}
+
+void *
+ui_file_data (file)
+     struct ui_file *file;
+{
+  if (file->magic != &ui_file_magic)
+    internal_error ("ui_file_data: bad magic number");
+  return file->to_data;
+}
+
+void
+gdb_flush (file)
+     struct ui_file *file;
+{
+  file->to_flush (file);
+}
+
+int
+ui_file_isatty (file)
+     struct ui_file *file;
+{
+  return file->to_isatty (file);
+}
+
+void
+ui_file_rewind (file)
+     struct ui_file *file;
+{
+  file->to_rewind (file);
+}
+
+void
+ui_file_put (struct ui_file *file,
+	      ui_file_put_method_ftype *write,
+	      void *dest)
+{
+  file->to_put (file, write, dest);
+}
+
+void
+ui_file_write (struct ui_file *file,
+		const char *buf,
+		long length_buf)
+{
+  file->to_write (file, buf, length_buf);
+}
+
+void
+fputs_unfiltered (buf, file)
+     const char *buf;
+     struct ui_file *file;
+{
+  file->to_fputs (buf, file);
+}
+
+void
+set_ui_file_flush (file, flush)
+     struct ui_file *file;
+     ui_file_flush_ftype *flush;
+{
+  file->to_flush = flush;
+}
+
+void
+set_ui_file_isatty (file, isatty)
+     struct ui_file *file;
+     ui_file_isatty_ftype *isatty;
+{
+  file->to_isatty = isatty;
+}
+
+void
+set_ui_file_rewind (file, rewind)
+     struct ui_file *file;
+     ui_file_rewind_ftype *rewind;
+{
+  file->to_rewind = rewind;
+}
+
+void
+set_ui_file_put (file, put)
+     struct ui_file *file;
+     ui_file_put_ftype *put;
+{
+  file->to_put = put;
+}
+
+void
+set_ui_file_write (struct ui_file *file,
+		    ui_file_write_ftype *write)
+{
+  file->to_write = write;
+}
+
+void
+set_ui_file_fputs (file, fputs)
+     struct ui_file *file;
+     ui_file_fputs_ftype *fputs;
+{
+  file->to_fputs = fputs;
+}
+
+void
+set_ui_file_data (file, data, delete)
+     struct ui_file *file;
+     void *data;
+     ui_file_delete_ftype *delete;
+{
+  file->to_data = data;
+  file->to_delete = delete;
+}
+
+/* ui_file utility function for converting a ``struct ui_file'' into
+   a memory buffer''. */
+
+struct accumulated_ui_file
+{
+  char *buffer;
+  long length;
+};
+
+static void
+do_ui_file_xstrdup (void *context, const char *buffer, long length)
+{
+  struct accumulated_ui_file *acc = context;
+  if (acc->buffer == NULL)
+    acc->buffer = xmalloc (length + 1);
+  else
+    acc->buffer = xrealloc (acc->buffer, acc->length + length + 1);
+  memcpy (acc->buffer + acc->length, buffer, length);
+  acc->length += length;
+  acc->buffer[acc->length] = '\0';
+}
+
+char *
+ui_file_xstrdup (struct ui_file *file,
+		  long *length)
+{
+  struct accumulated_ui_file acc;
+  acc.buffer = NULL;
+  acc.length = 0;
+  ui_file_put (file, do_ui_file_xstrdup, &acc);
+  if (acc.buffer == NULL)
+    acc.buffer = xstrdup ("");
+  *length = acc.length;
+  return acc.buffer;
+}
+
+/* A pure memory based ``struct ui_file'' that can be used an output
+   buffer. The buffers accumulated contents are available via
+   ui_file_put(). */
+
+struct mem_file
+  {
+    int *magic;
+    char *buffer;
+    int sizeof_buffer;
+    int length_buffer;
+  };
+
+static ui_file_rewind_ftype mem_file_rewind;
+static ui_file_put_ftype mem_file_put;
+static ui_file_write_ftype mem_file_write;
+static ui_file_delete_ftype mem_file_delete;
+static struct ui_file *mem_file_new PARAMS ((void));
+static int mem_file_magic;
+
+static struct ui_file *
+mem_file_new (void)
+{
+  struct mem_file *stream = XMALLOC (struct mem_file);
+  struct ui_file *file = ui_file_new ();
+  set_ui_file_data (file, stream, mem_file_delete);
+  set_ui_file_rewind (file, mem_file_rewind);
+  set_ui_file_put (file, mem_file_put);
+  set_ui_file_write (file, mem_file_write);
+  stream->magic = &mem_file_magic;
+  stream->buffer = NULL;
+  stream->sizeof_buffer = 0;
+  stream->length_buffer = 0;
+  return file;
+}
+
+static void
+mem_file_delete (struct ui_file *file)
+{
+  struct mem_file *stream = ui_file_data (file);
+  if (stream->magic != &mem_file_magic)
+    internal_error ("mem_file_delete: bad magic number");
+  if (stream->buffer != NULL)
+    free (stream->buffer);
+  free (stream);
+}
+
+struct ui_file *
+mem_fileopen (void)
+{
+  return mem_file_new ();
+}
+
+static void
+mem_file_rewind (struct ui_file *file)
+{
+  struct mem_file *stream = ui_file_data (file);
+  if (stream->magic != &mem_file_magic)
+    internal_error ("mem_file_rewind: bad magic number");
+  stream->length_buffer = 0;
+}
+
+static void
+mem_file_put (struct ui_file *file,
+	      ui_file_put_method_ftype *write,
+	      void *dest)
+{
+  struct mem_file *stream = ui_file_data (file);
+  if (stream->magic != &mem_file_magic)
+    internal_error ("mem_file_put: bad magic number");
+  if (stream->length_buffer > 0)
+    write (dest, stream->buffer, stream->length_buffer);
+}
+
+void
+mem_file_write (struct ui_file *file,
+		const char *buffer,
+		long length_buffer)
+{
+  struct mem_file *stream = ui_file_data (file);
+  if (stream->magic != &mem_file_magic)
+    internal_error ("mem_file_write: bad magic number");
+  if (stream->buffer == NULL)
+    {
+      stream->length_buffer = length_buffer;
+      stream->sizeof_buffer = length_buffer;
+      stream->buffer = xmalloc (stream->sizeof_buffer);
+      memcpy (stream->buffer, buffer, length_buffer);
+    }
+  else
+    {
+      int new_length = stream->length_buffer + length_buffer;
+      if (new_length >= stream->sizeof_buffer)
+	{
+	  stream->sizeof_buffer = new_length;
+	  stream->buffer = xrealloc (stream->buffer, stream->sizeof_buffer);
+	}
+      memcpy (stream->buffer + stream->length_buffer, buffer, length_buffer);
+      stream->length_buffer = new_length;
+    }
+}
+
+/* ``struct ui_file'' implementation that maps directly onto
+   <stdio.h>'s FILE. */
+
+static ui_file_write_ftype stdio_file_write;
+static ui_file_fputs_ftype stdio_file_fputs;
+static ui_file_isatty_ftype stdio_file_isatty;
+static ui_file_delete_ftype stdio_file_delete;
+static struct ui_file *stdio_file_new PARAMS ((FILE * file, int close_p));
+static ui_file_flush_ftype stdio_file_flush;
+
+static int stdio_file_magic;
+
+struct stdio_file
+  {
+    int *magic;
+    FILE *file;
+    int close_p;
+  };
+
+static struct ui_file *
+stdio_file_new (file, close_p)
+     FILE *file;
+     int close_p;
+{
+  struct ui_file *ui_file = ui_file_new ();
+  struct stdio_file *stdio = xmalloc (sizeof (struct stdio_file));
+  stdio->magic = &stdio_file_magic;
+  stdio->file = file;
+  stdio->close_p = close_p;
+  set_ui_file_data (ui_file, stdio, stdio_file_delete);
+  set_ui_file_flush (ui_file, stdio_file_flush);
+  set_ui_file_write (ui_file, stdio_file_write);
+  set_ui_file_fputs (ui_file, stdio_file_fputs);
+  set_ui_file_isatty (ui_file, stdio_file_isatty);
+  return ui_file;
+}
+
+static void
+stdio_file_delete (file)
+     struct ui_file *file;
+{
+  struct stdio_file *stdio = ui_file_data (file);
+  if (stdio->magic != &stdio_file_magic)
+    internal_error ("stdio_file_delete: bad magic number");
+  if (stdio->close_p)
+    {
+      fclose (stdio->file);
+    }
+  free (stdio);
+}
+
+static void
+stdio_file_flush (file)
+     struct ui_file *file;
+{
+  struct stdio_file *stdio = ui_file_data (file);
+  if (stdio->magic != &stdio_file_magic)
+    internal_error ("stdio_file_flush: bad magic number");
+  fflush (stdio->file);
+}
+
+static void
+stdio_file_write (struct ui_file *file, const char *buf, long length_buf)
+{
+  struct stdio_file *stdio = ui_file_data (file);
+  if (stdio->magic != &stdio_file_magic)
+    internal_error ("stdio_file_write: bad magic number");
+  fwrite (buf, length_buf, 1, stdio->file);
+}
+
+static void
+stdio_file_fputs (linebuffer, file)
+     const char *linebuffer;
+     struct ui_file *file;
+{
+  struct stdio_file *stdio = ui_file_data (file);
+  if (stdio->magic != &stdio_file_magic)
+    internal_error ("stdio_file_fputs: bad magic number");
+  fputs (linebuffer, stdio->file);
+}
+
+static int
+stdio_file_isatty (file)
+     struct ui_file *file;
+{
+  struct stdio_file *stdio = ui_file_data (file);
+  if (stdio->magic != &stdio_file_magic)
+    internal_error ("stdio_file_isatty: bad magic number");
+  return (isatty (fileno (stdio->file)));
+}
+
+/* Like fdopen().  Create a ui_file from a previously opened FILE. */
+
+struct ui_file *
+stdio_fileopen (file)
+     FILE *file;
+{
+  return stdio_file_new (file, 0);
+}
+
+struct ui_file *
+gdb_fopen (name, mode)
+     char *name;
+     char *mode;
+{
+  FILE *f = fopen (name, mode);
+  if (f == NULL)
+    return NULL;
+  return stdio_file_new (f, 1);
+}