merge mainline into asprintf

normal/term.c

@@ -0,0 +1,251 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2002,2003,2005,2007,2008,2009  Free Software Foundation, Inc.
+ *
+ *  GRUB 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 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB 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 GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/term.h>
+#include <grub/misc.h>
+#include <grub/mm.h>
+#include <grub/file.h>
+#include <grub/dl.h>
+#include <grub/env.h>
+#include <grub/normal.h>
+
+/* The amount of lines counted by the pager.  */
+static unsigned grub_more_lines;
+
+/* If the more pager is active.  */
+static int grub_more;
+
+static void
+process_newline (void)
+{
+  struct grub_term_output *cur;
+  unsigned height = -1;
+
+  FOR_ACTIVE_TERM_OUTPUTS(cur)
+    if (grub_term_height (cur) < height)
+      height = grub_term_height (cur);
+  grub_more_lines++;
+
+  if (grub_more && grub_more_lines >= height - 1)
+    {
+      char key;
+      grub_uint16_t *pos;
+
+      pos = grub_term_save_pos ();
+
+      grub_setcolorstate (GRUB_TERM_COLOR_HIGHLIGHT);
+      grub_printf ("--MORE--");
+      grub_setcolorstate (GRUB_TERM_COLOR_STANDARD);
+
+      key = grub_getkey ();
+
+      /* Remove the message.  */
+      grub_term_restore_pos (pos);
+      grub_printf ("        ");
+      grub_term_restore_pos (pos);
+
+      /* Scroll one lines or an entire page, depending on the key.  */
+      if (key == '\r' || key =='\n')
+	grub_more_lines = height - 2;
+      else
+	grub_more_lines = 0;
+    }
+}
+
+void
+grub_set_more (int onoff)
+{
+  if (onoff == 1)
+    grub_more++;
+  else
+    grub_more--;
+
+  grub_more_lines = 0;
+  grub_newline_hook = process_newline;
+}
+
+void
+grub_puts_terminal (const char *str, struct grub_term_output *term)
+{
+  grub_uint32_t code;
+  grub_ssize_t ret;
+  const grub_uint8_t *ptr = (const grub_uint8_t *) str;
+  const grub_uint8_t *end;
+  end = (const grub_uint8_t *) (str + grub_strlen (str));
+
+  while (*ptr)
+    {
+      ret = grub_utf8_to_ucs4 (&code, 1, ptr, end - ptr, &ptr);
+      grub_putcode (code, term);	
+    }
+}
+
+grub_uint16_t *
+grub_term_save_pos (void)
+{
+  struct grub_term_output *cur;
+  unsigned cnt = 0;
+  grub_uint16_t *ret, *ptr;
+  
+  FOR_ACTIVE_TERM_OUTPUTS(cur)
+    cnt++;
+
+  ret = grub_malloc (cnt * sizeof (ret[0]));
+  if (!ret)
+    return NULL;
+
+  ptr = ret;
+  FOR_ACTIVE_TERM_OUTPUTS(cur)
+    *ptr++ = grub_term_getxy (cur);
+
+  return ret;
+}
+
+void
+grub_term_restore_pos (grub_uint16_t *pos)
+{
+  struct grub_term_output *cur;
+  grub_uint16_t *ptr = pos;
+
+  if (!pos)
+    return;
+
+  FOR_ACTIVE_TERM_OUTPUTS(cur)
+  {
+    grub_term_gotoxy (cur, (*ptr & 0xff00) >> 8, *ptr & 0xff);
+    ptr++;
+  }
+}
+
+static void 
+grub_terminal_autoload_free (void)
+{
+  struct grub_term_autoload *cur, *next;
+  unsigned i;
+  for (i = 0; i < 2; i++)
+    for (cur = i ? grub_term_input_autoload : grub_term_output_autoload;
+	 cur; cur = next)
+      {
+	next = cur->next;
+	grub_free (cur->name);
+	grub_free (cur->modname);
+	grub_free (cur);
+      }
+  grub_term_input_autoload = NULL;
+  grub_term_output_autoload = NULL;
+}
+
+
+/* Read the file terminal.lst for auto-loading.  */
+void
+read_terminal_list (void)
+{
+  const char *prefix;
+  char *filename;
+  grub_file_t file;
+  char *buf = NULL;
+
+  prefix = grub_env_get ("prefix");
+  if (!prefix)
+    {
+      grub_errno = GRUB_ERR_NONE;
+      return;
+    }
+  
+  filename = grub_asprintf ("%s/terminal.lst", prefix);
+  if (!filename)
+    {
+      grub_errno = GRUB_ERR_NONE;
+      return;
+    }
+
+  file = grub_file_open (filename);
+  if (!file)
+    {
+      grub_errno = GRUB_ERR_NONE;
+      return;
+    }
+
+  /* Override previous terminal.lst.  */
+  grub_terminal_autoload_free ();
+
+  for (;; grub_free (buf))
+    {
+      char *p, *name;
+      struct grub_term_autoload *cur;
+      struct grub_term_autoload **target = NULL;
+      
+      buf = grub_file_getline (file);
+	
+      if (! buf)
+	break;
+
+      switch (buf[0])
+	{
+	case 'i':
+	  target = &grub_term_input_autoload;
+	  break;
+
+	case 'o':
+	  target = &grub_term_output_autoload;
+	  break;
+	}
+      if (!target)
+	continue;
+      
+      name = buf + 1;
+            
+      p = grub_strchr (name, ':');
+      if (! p)
+	continue;
+      
+      *p = '\0';
+      while (*++p == ' ')
+	;
+
+      cur = grub_malloc (sizeof (*cur));
+      if (!cur)
+	{
+	  grub_errno = GRUB_ERR_NONE;
+	  continue;
+	}
+      
+      cur->name = grub_strdup (name);
+      if (! name)
+	{
+	  grub_errno = GRUB_ERR_NONE;
+	  grub_free (cur);
+	  continue;
+	}
+	
+      cur->modname = grub_strdup (p);
+      if (! cur->modname)
+	{
+	  grub_errno = GRUB_ERR_NONE;
+	  grub_free (cur);
+	  grub_free (cur->name);
+	  continue;
+	}
+      cur->next = *target;
+      *target = cur;
+    }
+  
+  grub_file_close (file);
+
+  grub_errno = GRUB_ERR_NONE;
+}