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Diffstat (limited to 'term/term.h')
| -rw-r--r-- | term/term.h | 264 |
1 files changed, 264 insertions, 0 deletions
diff --git a/term/term.h b/term/term.h new file mode 100644 index 00000000..a55f7027 --- /dev/null +++ b/term/term.h @@ -0,0 +1,264 @@ +/* + Copyright (C) 1995 Free Software Foundation, Inc. + Written by Michael I. Bushnell, p/BSG. + + This file is part of the GNU Hurd. + + The GNU Hurd 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, or (at + your option) any later version. + + The GNU Hurd 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, USA. */ + +#include <cthreads.h> +#include <assert.h> + +#undef MDMBUF +#undef ECHO +#undef TOSTOP +#undef FLUSHO +#undef PENDIN +#undef NOFLSH +#include <termios.h> + +#define CHAR_SOH '\001' /* C-a */ +#define CHAR_EOT '\004' /* C-d */ +#define CHAR_DC3 '\022' /* C-r */ +#define CHAR_USER_QUOTE '\377' /* break quoting, etc. */ + +/* XXX These belong in <termios.h> */ +#define ILCASE (1 << 14) +#define OLCASE (1 << 9) +#define OTILDE (1 << 10) + +/* used in mdmctl device call */ +#define MDMCTL_BIS 0 +#define MDMCTL_BIC 1 +#define MDMCTL_SET 2 + +/* Directly user-visible state */ +struct termios termstate; + +/* Other state with the following bits: */ +long termflags; + +#define USER_OUTPUT_SUSP 0x00000001 /* user has suspended output */ +#define TTY_OPEN 0x00000002 /* someone has us open */ +#define LAST_SLASH 0x00000004 /* last input char was \ */ +#define LAST_LNEXT 0x00000008 /* last input char was VLNEXT */ +#define INSIDE_HDERASE 0x00000010 /* inside \.../ hardcopy erase pair */ +#define SENT_VSTOP 0x00000020 /* we've sent VSTOP to IXOFF peer */ +#define FLUSH_OUTPUT 0x00000040 /* user wants output flushed */ +#define NO_CARRIER 0x00000080 /* carrier is absent */ +#define EXCL_USE 0x00000100 /* user accessible exclusive use */ +#define NO_OWNER 0x00000200 /* there is no foreground_id */ +#define ICKY_ASYNC 0x00000400 /* some user has set O_ASYNC */ + +/* PHYSICAL position of the terminal cursor */ +int output_psize; + +/* Global lock */ +struct mutex global_lock; + +/* Wakeup when NO_CARRIER turns off */ +struct condition carrier_alert; + +/* Wakeup for select */ +struct condition select_alert; + +/* Bucket for all our ports. */ +struct port_bucket *term_bucket; + +/* Port class for tty control ports */ +struct port_class *tty_cntl_class; + +/* Port class for tty I/O ports */ +struct port_class *tty_class; + +/* Port class for ctty ID ports */ +struct port_class *cttyid_class; + +/* Trivfs control structure for the tty */ +struct trivfs_control *termctl; + +/* Filename for this terminal */ +char *nodename; + +/* Mach device name for this terminal */ +char *pterm_name; + +/* The queues we use */ +struct queue *inputq, *rawq, *outputq; + + +/* Character queues */ +#define QUEUE_QUOTE_MARK 0xf000 +typedef short quoted_char; +struct queue +{ + int susp; + int lowat; + int hiwat; + short *cs, *ce; + int arraylen; + struct condition *wait; + quoted_char array[0]; +}; + +struct queue *create_queue (int size, int lowat, int hiwat); + +/* Return the number of characters in Q. */ +extern inline int +qsize (struct queue *q) +{ + return q->ce - q->cs; +} + +/* Return nonzero if characters can be added to Q. */ +extern inline int +qavail (struct queue *q) +{ + return !q->susp; +} + +/* Flush all the characters from Q. */ +extern inline int +clear_queue (struct queue *q) +{ + q->susp = 0; + q->cs = q->ce = q->array; + condition_broadcast (q->wait); +} + + +/* Return the next character off Q; leave the quoting bit on. */ +extern inline quoted_char +dequeue_quote (struct queue *q) +{ + int beep = 0; + + assert (qsize (q)); + if (q->susp && (qsize (q) < q->lowat)) + { + q->susp = 0; + beep = 1; + } + if (qsize (q) == 1) + beep = 1; + if (beep) + condition_broadcast (q->wait); + return *q->cs++; +} + +/* Return the next character off Q. */ +extern inline char +dequeue (struct queue *q) +{ + return dequeue_quote (q) & ~QUEUE_QUOTE_MARK; +} + +struct queue *reallocate_queue (struct queue *); + +/* Add C to *QP. */ +extern inline void +enqueue_internal (struct queue **qp, quoted_char c) +{ + struct queue *q = *qp; + + if (q->ce - q->array == q->arraylen) + q = *qp = reallocate_queue (q); + + *q->ce++ = c; + + if (qsize (q) == 1) + condition_broadcast (q->wait); + + if (!q->susp && (qsize (q) > q->hiwat)) + q->susp = 1; +} + +/* Add C to *QP. */ +extern inline void +enqueue (struct queue **qp, char c) +{ + enqueue_internal (qp, c); +} + +/* Add C to *QP, marking it with a quote. */ +extern inline void +enqueue_quote (struct queue **qp, char c) +{ + enqueue_internal (qp, c | QUEUE_QUOTE_MARK); +} + +/* Return the unquoted version of a quoted_char. */ +extern inline char +unquote_char (quoted_char c) +{ + return c & ~QUEUE_QUOTE_MARK; +} + +/* Tell if a quoted_char is actually quoted. */ +extern inline int +char_quoted_p (quoted_char c) +{ + return c & QUEUE_QUOTE_MARK; +} + +/* Remove the most recently enqueue character from Q; leaving + the quote mark on. */ +extern inline short +queue_erase (struct queue *q) +{ + short answer; + int beep = 0; + + assert (qsize (q)); + answer = *--q->ce; + if (q->susp && (qsize (q) < q->lowat)) + { + q->susp = 0; + beep = 1; + } + if (qsize (q) == 0) + beep = 1; + if (beep) + condition_broadcast (q->wait); + return answer; +} + + +/* Functions devio is supposed to call */ +int input_character (int); +void report_carrier_on (void); +void report_carrier_off (void); + + +/* Other decls */ +void drop_output (void); +void send_signal (int); +error_t drain_output (); +void output_character (int); +void copy_rawq (void); +void rescan_inputq (void); + + +/* exported by the devio interface */ +void start_output (void); +void set_break (void); +void clear_break (void); +void abandon_physical_output (void); +int pending_output_size (void); +error_t assert_dtr (void); +void desert_dtr (void); +void set_bits (void); +void mdmctl (int, int); +int mdmstate (void); |