diff options
Diffstat (limited to 'mixlib/mix_device.c')
| -rw-r--r-- | mixlib/mix_device.c | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/mixlib/mix_device.c b/mixlib/mix_device.c new file mode 100644 index 0000000..30fee7e --- /dev/null +++ b/mixlib/mix_device.c @@ -0,0 +1,217 @@ +/* -*-c-*- -------------- mix_device.c : + * Implementation of the functions declared in mix_device.h + * ------------------------------------------------------------------ + * Copyright (C) 2000 jose antonio ortega ruiz <jaortega@acm.org> + * + * 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 "mix_file.h" +#include "mix_device.h" + +/* + Actual definition of a mix device, which can be cast to + a mix file. +*/ +struct mix_device_t +{ + mix_iochannel_t *file; + mix_device_type_t type; +}; + + +static const char *DEV_EXT_ = ".dev"; + +static 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" +}; + +static 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 +}; + +static 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 +}; + +static 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_WRITE +}; + +#define GET_CHANNEL_(dev) (dev->file) +#define GET_FILE_(dev) ((mix_file_t *)(dev->file)) + +mix_device_t * +mix_device_new (mix_device_type_t type) +{ + mix_device_t *result = g_new (mix_device_t, 1); + g_return_val_if_fail (result != NULL, result); + result->type = type; + if (type != mix_dev_CONSOLE) { + result->file = MIX_IOCHANNEL(mix_file_new_with_def_ext (DEF_NAMES_[type], + FMODES_[type], + DEV_EXT_)); + } else + result->file = mix_io_new (stdout); + + return result; +} + +void +mix_device_delete (mix_device_t *dev) +{ + if (dev != NULL) + { + if (dev->type != mix_dev_CONSOLE && GET_FILE_(dev) != NULL) + mix_file_delete (GET_FILE_(dev)); + g_free (dev); + } +} + +mix_device_t * +mix_device_new_with_name (mix_device_type_t type, const gchar *name) +{ + mix_device_t *result = NULL; + g_return_val_if_fail (name != NULL, result); + result = g_new (mix_device_t, 1); + g_return_val_if_fail (result != NULL, result); + result->type = type; + if (type != mix_dev_CONSOLE) + { + result->file = MIX_IOCHANNEL(mix_file_new_with_def_ext (name, + FMODES_[type], + DEV_EXT_)); + } + else + { + result->file = mix_io_new (stdout); + } + return result; +} + +const char * +mix_device_get_name (mix_device_t *dev) +{ + g_return_val_if_fail (dev != NULL, NULL); + return mix_file_base_name(GET_FILE_(dev)); +} + +/* + Get the device block size +*/ +size_t +mix_device_block_size (mix_device_t *dev) +{ + g_return_val_if_fail (dev != NULL, 0); + return SIZES_[dev->type]; +} + +/* + Get the device io mode +*/ +mix_device_mode_t +mix_device_mode (mix_device_t *dev) +{ + g_return_val_if_fail (dev != NULL, 0); + return MODES_[dev->type]; +} + +/* + Write a block to the device. +*/ +gboolean +mix_device_write (mix_device_t *dev, const mix_word_t *block) +{ + gboolean result; + + g_return_val_if_fail (dev != NULL, FALSE); + g_return_val_if_fail (block != NULL, FALSE); + 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))); + + return result; +} + +gboolean +mix_device_read (mix_device_t *dev, mix_word_t *block) +{ + g_return_val_if_fail (dev != NULL, FALSE); + g_return_val_if_fail (block != NULL, FALSE); + 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]); +} + +gboolean +mix_device_ioc (mix_device_t *dev, mix_short_t arg) +{ + int m; + FILE *file; + + g_return_val_if_fail (dev != NULL, FALSE); + + 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; +} + +gboolean +mix_device_busy (mix_device_t *dev) +{ + return (dev != NULL && !mix_io_is_ready(GET_CHANNEL_(dev))); +} |