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-rw-r--r--mixlib/xmix_device.c199
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diff --git a/mixlib/xmix_device.c b/mixlib/xmix_device.c
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+/* -*-c-*- -------------- xmix_device.c :
+ * Implementation of the functions declared in xmix_device.h
+ * ------------------------------------------------------------------
+ * Last change: Time-stamp: "2001-05-10 01:10:25 jao"
+ * ------------------------------------------------------------------
+ * Copyright (C) 2001, 2004 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+
+#include "xmix_device.h"
+#include "mix_types.h"
+
+gchar *DEV_DIR_ = NULL;
+
+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_RDWRT, mix_io_READ
+};
+
+/* constructors */
+void
+construct_device_ (mix_device_t *result, mix_device_type_t type)
+{
+ gchar *name;
+ name = DEV_DIR_ ? g_strdup_printf ("%s/%s", DEV_DIR_, DEF_NAMES_[type])
+ : g_strdup (DEF_NAMES_[type]);
+ construct_device_with_name_ (result, type, name);
+ g_free (name);
+}
+
+
+void
+construct_device_with_name_ (mix_device_t *result,
+ mix_device_type_t type, const gchar *name)
+{
+ result->type = type;
+ if (type != mix_dev_CONSOLE)
+ {
+ result->file = MIX_IOCHANNEL(mix_file_new_with_def_ext (name,
+ FMODES_[type],
+ DEV_EXT_));
+ result->vtable = DEF_DEV_VTABLE_;
+ }
+ else
+ {
+ result->file = mix_io_new (stdout);
+ result->vtable = CONSOLE_DEV_VTABLE_;
+ }
+}
+
+
+void
+construct_device_with_file_ (mix_device_t *result,
+ mix_device_type_t type, FILE *file)
+{
+ result->type = type;
+ result->file = mix_io_new (file);
+ result->vtable = DEF_DEV_VTABLE_;
+}
+
+
+/*
+ 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]);
+ fflush (mix_io_to_FILE (GET_CHANNEL_ (dev)));
+
+ return result;
+}
+
+static gboolean
+read_cons_ (mix_device_t *dev, mix_word_t *block)
+{
+ return mix_io_read_word_array_as_char (mix_io_new (stdin), block,
+ SIZES_[mix_dev_CONSOLE]);
+}
+
+static gboolean
+read_ (mix_device_t *dev, mix_word_t *block)
+{
+ gboolean result;
+
+ if (FMODES_[dev->type] == mix_io_WRITE) return FALSE;
+ if (MODES_[dev->type] == mix_dev_CHAR)
+ {
+ result = mix_io_read_word_array_as_char (GET_CHANNEL_ (dev),
+ block, SIZES_[dev->type]);
+ }
+ else
+ result = mix_io_read_word_array (GET_CHANNEL_ (dev),
+ block, SIZES_[dev->type]);
+
+ return result;
+}
+
+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)
+ {
+ if (m == 0) return FALSE;
+ // position disk
+ }
+ if (dev->type == mix_dev_PAPER_TAPE)
+ {
+ if (m == 0) return FALSE;
+ rewind (file);
+ }
+ return TRUE;
+}
+
+static gboolean
+busy_ (const mix_device_t *dev)
+{
+ return (!mix_io_is_ready (GET_CHANNEL_(dev)));
+}
+
+static void
+destroy_ (mix_device_t *dev)
+{
+ if (dev->type != mix_dev_CONSOLE && GET_FILE_(dev) != NULL)
+ mix_file_delete (GET_FILE_(dev));
+}
+
+static mix_device_vtable_t VTABLE_ = {
+ write_, read_, ioc_, busy_, destroy_
+};
+
+const mix_device_vtable_t * DEF_DEV_VTABLE_ = &VTABLE_;
+
+static mix_device_vtable_t CVTABLE_ = {
+ write_, read_cons_, ioc_, busy_, destroy_
+};
+
+const mix_device_vtable_t * CONSOLE_DEV_VTABLE_ = &CVTABLE_;