From 1c345e559710ec6200f7d508629bd24457a20a80 Mon Sep 17 00:00:00 2001
From: Jose Antonio Ortega Ruiz <jao@gnu.org>
Date: Thu, 22 Mar 2001 03:01:01 +0000
Subject: initial import (sf 0.3beta)

---
 mixlib/xmix_device.c | 131 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 131 insertions(+)
 create mode 100644 mixlib/xmix_device.c

(limited to 'mixlib/xmix_device.c')

diff --git a/mixlib/xmix_device.c b/mixlib/xmix_device.c
new file mode 100644
index 0000000..4754015
--- /dev/null
+++ b/mixlib/xmix_device.c
@@ -0,0 +1,131 @@
+/* -*-c-*- -------------- xmix_device.c :
+ * Implementation of the functions declared in xmix_device.h
+ * ------------------------------------------------------------------
+ *  Last change: Time-stamp: "01/03/02 23:14:57 jose"
+ * ------------------------------------------------------------------
+ * Copyright (C) 2001 Free Software Foundation, Inc.
+ *  
+ * 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.
+ *  
+ */
+
+
+#include "xmix_device.h"
+
+const char *DEV_EXT_ = ".dev";
+
+const char *DEF_NAMES_[] = {
+  "tape0", "tape1", "tape2", "tape3", "tape4", "tape5", "tape6", "tape7",
+  "disk0", "disk1", "disk2", "disk3", "disk4", "disk5", "disk6", "disk7",
+  "cardrd", "cardwr", "printer", "console", "paper"
+};
+
+const size_t SIZES_[] = {
+  100, 100, 100, 100, 100, 100, 100, 100,
+  100, 100, 100, 100, 100, 100, 100, 100,
+  16, 16, 24, 14, 14
+};
+
+const mix_device_mode_t MODES_[] = {
+  mix_dev_BIN, mix_dev_BIN, mix_dev_BIN, mix_dev_BIN, mix_dev_BIN,  
+  mix_dev_BIN, mix_dev_BIN, mix_dev_BIN, mix_dev_BIN, mix_dev_BIN,  
+  mix_dev_BIN, mix_dev_BIN, mix_dev_BIN, mix_dev_BIN, mix_dev_BIN,
+  mix_dev_BIN, mix_dev_CHAR, mix_dev_CHAR, mix_dev_CHAR, mix_dev_CHAR,
+  mix_dev_CHAR
+};
+
+const mix_fmode_t FMODES_[] = {
+  mix_io_RDWRT,  mix_io_RDWRT,  mix_io_RDWRT,  mix_io_RDWRT,
+  mix_io_RDWRT,  mix_io_RDWRT,  mix_io_RDWRT,  mix_io_RDWRT,
+  mix_io_RDWRT,  mix_io_RDWRT,  mix_io_RDWRT,  mix_io_RDWRT,
+  mix_io_RDWRT,  mix_io_RDWRT,  mix_io_RDWRT,  mix_io_RDWRT,
+  mix_io_READ, mix_io_WRITE, mix_io_WRITE, mix_io_WRITE, mix_io_WRITE
+};
+
+/*
+  Write a block to the device.
+*/
+static gboolean
+write_ (mix_device_t *dev, const mix_word_t *block) 
+{
+  gboolean result;
+
+  if (FMODES_[dev->type] == mix_io_READ) return FALSE;
+  if (MODES_[dev->type] == mix_dev_CHAR)
+    result = mix_io_write_word_array_as_char (GET_CHANNEL_ (dev),
+					      block, SIZES_[dev->type]);
+  else
+    result = mix_io_write_word_array (GET_CHANNEL_ (dev),
+				      block, SIZES_[dev->type]);
+  if (result && mix_device_mode(dev) == mix_dev_CHAR) 
+    putc ('\n', mix_io_to_FILE (GET_CHANNEL_ (dev)));
+
+  fflush (mix_io_to_FILE (GET_CHANNEL_ (dev)));
+  
+  return result;
+}
+
+static gboolean
+read_ (mix_device_t *dev, mix_word_t *block) 
+{
+  if (FMODES_[dev->type] == mix_io_WRITE) return FALSE;
+  if (MODES_[dev->type] == mix_dev_CHAR)
+    return mix_io_read_word_array_as_char (GET_CHANNEL_ (dev),
+					   block, SIZES_[dev->type]);
+  else
+    return mix_io_read_word_array (GET_CHANNEL_ (dev),
+				   block, SIZES_[dev->type]);
+}
+
+static gboolean
+ioc_ (mix_device_t *dev, mix_short_t arg) 
+{
+  int m;
+  FILE *file;
+  
+  m = mix_short_magnitude(arg);
+  if (mix_short_is_negative(arg)) m = -m;
+  m *= sizeof (mix_word_t) * SIZES_[dev->type];
+  file = mix_io_to_FILE (GET_CHANNEL_(dev));
+  
+  if (dev->type >= mix_dev_TAPE_0 && dev->type <= mix_dev_TAPE_7)
+    {
+      if (m == 0) rewind (file);
+      else fseek (file, m, SEEK_CUR);
+    }
+  if (dev->type >= mix_dev_DISK_0 && dev->type <= mix_dev_DISK_7)
+    {
+      g_return_val_if_fail (m == 0, FALSE);
+      // position disk
+    }
+  if (dev->type == mix_dev_PAPER_TAPE)
+    {
+      g_return_val_if_fail (m == 0, FALSE);
+      rewind (file);
+    }
+  return TRUE;
+}
+
+static gboolean
+busy_ (const mix_device_t *dev)
+{
+  return (!mix_io_is_ready (GET_CHANNEL_(dev)));
+}
+
+static mix_device_vtable_t VTABLE_ = {
+  write_, read_, ioc_, busy_
+};
+
+const mix_device_vtable_t * DEF_DEV_VTABLE_ = &VTABLE_;
-- 
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