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Return statement is not a function so remove superfluous use of parenthesis. Cc: Thiago Farina <tfransosi@gmail.com> Signed-off-by: Pekka Enberg <penberg@kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
515 lines
12 KiB
C
515 lines
12 KiB
C
/* VMSVT.C
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*
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* Advanced VMS terminal driver
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*
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* Knows about any terminal defined in SMGTERMS.TXT and TERMTABLE.TXT
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* located in SYS$SYSTEM.
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*
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* Author: Curtis Smith
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* modified by Petri Kutvonen
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*/
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#include <stdio.h> /* Standard I/O package */
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#include "estruct.h" /* Emacs' structures */
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#include "edef.h" /* Emacs' definitions */
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#if VMSVT
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#include <descrip.h> /* Descriptor definitions */
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/* These would normally come from iodef.h and ttdef.h */
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#define IO$_SENSEMODE 0x27 /* Sense mode of terminal */
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#define TT$_UNKNOWN 0x00 /* Unknown terminal */
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#define TT$_VT100 96
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/** Forward references **/
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int vmsopen(), ttclose(), vmskopen(), vmskclose(), ttgetc(), ttputc();
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int ttflush(), vmsmove(), vmseeol(), vmseeop(), vmsbeep(), vmsrev();
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int vmscres();
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extern int eolexist, revexist;
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extern char sres[];
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#if COLOR
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int vmsfcol(), vmsbcol();
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#endif
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/** SMG stuff **/
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static char *begin_reverse, *end_reverse, *erase_to_end_line;
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static char *erase_whole_display;
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static int termtype;
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#define SMG$K_BEGIN_REVERSE 0x1bf
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#define SMG$K_END_REVERSE 0x1d6
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#define SMG$K_SET_CURSOR_ABS 0x23a
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#define SMG$K_ERASE_WHOLE_DISPLAY 0x1da
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#define SMG$K_ERASE_TO_END_LINE 0x1d9
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#if SCROLLCODE
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#define SMG$K_SCROLL_FORWARD 561 /* from sys$library:smgtrmptr.h */
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#define SMG$K_SCROLL_REVERSE 562
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#define SMG$K_SET_SCROLL_REGION 572
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static char *scroll_forward, *scroll_reverse;
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#endif
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/* Dispatch table. All hard fields just point into the terminal I/O code. */
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struct terminal term = {
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#if PKCODE
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MAXROW,
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#else
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24 - 1, /* Max number of rows allowable */
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#endif
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/* Filled in */ -1,
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/* Current number of rows used */
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MAXCOL, /* Max number of columns */
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/* Filled in */ 0,
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/* Current number of columns */
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64, /* Min margin for extended lines */
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8, /* Size of scroll region */
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100, /* # times thru update to pause */
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vmsopen, /* Open terminal at the start */
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ttclose, /* Close terminal at end */
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vmskopen, /* Open keyboard */
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vmskclose, /* Close keyboard */
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ttgetc, /* Get character from keyboard */
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ttputc, /* Put character to display */
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ttflush, /* Flush output buffers */
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vmsmove, /* Move cursor, origin 0 */
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vmseeol, /* Erase to end of line */
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vmseeop, /* Erase to end of page */
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vmsbeep, /* Beep */
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vmsrev, /* Set reverse video state */
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vmscres /* Change screen resolution */
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#if COLOR
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, vmsfcol, /* Set forground color */
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vmsbcol /* Set background color */
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#endif
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#if SCROLLCODE
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, NULL
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#endif
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};
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/***
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* ttputs - Send a string to ttputc
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*
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* Nothing returned
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***/
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ttputs(string)
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char *string; /* String to write */
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{
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if (string)
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while (*string != '\0')
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ttputc(*string++);
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}
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/***
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* vmsmove - Move the cursor (0 origin)
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*
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* Nothing returned
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***/
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vmsmove(row, col)
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int row; /* Row position */
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int col; /* Column position */
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{
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char buffer[32];
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int ret_length;
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static int request_code = SMG$K_SET_CURSOR_ABS;
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static int max_buffer_length = sizeof(buffer);
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static int arg_list[3] = { 2 };
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char *cp;
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int i;
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/* Set the arguments into the arg_list array
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* SMG assumes the row/column positions are 1 based (boo!)
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*/
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arg_list[1] = row + 1;
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arg_list[2] = col + 1;
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if ((smg$get_term_data( /* Get terminal data */
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&termtype, /* Terminal table address */
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&request_code, /* Request code */
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&max_buffer_length, /* Maximum buffer length */
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&ret_length, /* Return length */
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buffer, /* Capability data buffer */
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arg_list)
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/* Argument list array */
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/* We'll know soon enough if this doesn't work */
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&1) == 0) {
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ttputs("OOPS");
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return;
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}
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/* Send out resulting sequence */
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i = ret_length;
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cp = buffer;
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while (i-- > 0)
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ttputc(*cp++);
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}
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#if SCROLLCODE
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vmsscroll_reg(from, to, howmany)
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{
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int i;
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if (to == from)
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return;
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if (to < from) {
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vmsscrollregion(to, from + howmany - 1);
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vmsmove(from + howmany - 1, 0);
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for (i = from - to; i > 0; i--)
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ttputs(scroll_forward);
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} else { /* from < to */
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vmsscrollregion(from, to + howmany - 1);
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vmsmove(from, 0);
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for (i = to - from; i > 0; i--)
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ttputs(scroll_reverse);
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}
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vmsscrollregion(-1, -1);
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}
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vmsscrollregion(top, bot)
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int top; /* Top position */
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int bot; /* Bottom position */
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{
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char buffer[32];
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int ret_length;
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static int request_code = SMG$K_SET_SCROLL_REGION;
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static int max_buffer_length = sizeof(buffer);
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static int arg_list[3] = { 2 };
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char *cp;
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int i;
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/* Set the arguments into the arg_list array
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* SMG assumes the row/column positions are 1 based (boo!)
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*/
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arg_list[1] = top + 1;
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arg_list[2] = bot + 1;
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if ((smg$get_term_data( /* Get terminal data */
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&termtype, /* Terminal table address */
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&request_code, /* Request code */
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&max_buffer_length, /* Maximum buffer length */
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&ret_length, /* Return length */
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buffer, /* Capability data buffer */
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arg_list)
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/* Argument list array */
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/* We'll know soon enough if this doesn't work */
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&1) == 0) {
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ttputs("OOPS");
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return;
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}
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ttputc(0);
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/* Send out resulting sequence */
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i = ret_length;
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cp = buffer;
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while (i-- > 0)
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ttputc(*cp++);
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}
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#endif
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/***
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* vmsrev - Set the reverse video status
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*
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* Nothing returned
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***/
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vmsrev(status)
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int status; /* TRUE if setting reverse */
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{
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if (status)
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ttputs(begin_reverse);
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else
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ttputs(end_reverse);
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}
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/***
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* vmscres - Change screen resolution (which it doesn't)
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*
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* Nothing returned
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***/
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vmscres()
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{
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/* But it could. For vt100/vt200s, one could switch from
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80 and 132 columns modes */
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}
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#if COLOR
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/***
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* vmsfcol - Set the forground color (not implimented)
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*
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* Nothing returned
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***/
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vmsfcol()
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{
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}
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/***
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* vmsbcol - Set the background color (not implimented)
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*
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* Nothing returned
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***/
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vmsbcol()
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{
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}
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#endif
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/***
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* vmseeol - Erase to end of line
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*
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* Nothing returned
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***/
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vmseeol()
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{
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ttputs(erase_to_end_line);
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}
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/***
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* vmseeop - Erase to end of page (clear screen)
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*
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* Nothing returned
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***/
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vmseeop()
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{
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ttputs(erase_whole_display);
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}
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/***
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* vmsbeep - Ring the bell
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*
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* Nothing returned
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***/
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vmsbeep()
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{
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ttputc('\007');
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}
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/***
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* vmsgetstr - Get an SMG string capability by name
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*
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* Returns: Escape sequence
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* NULL No escape sequence available
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***/
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char *vmsgetstr(request_code)
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int request_code; /* Request code */
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{
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char *result;
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static char seq_storage[1024];
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static char *buffer = seq_storage;
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static int arg_list[2] = { 1, 1 };
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int max_buffer_length, ret_length;
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/* Precompute buffer length */
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max_buffer_length = (seq_storage + sizeof(seq_storage)) - buffer;
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/* Get terminal commands sequence from master table */
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if ((smg$get_term_data( /* Get terminal data */
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&termtype, /* Terminal table address */
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&request_code, /* Request code */
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&max_buffer_length, /* Maximum buffer length */
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&ret_length, /* Return length */
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buffer, /* Capability data buffer */
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arg_list)
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/* Argument list array */
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/* If this doesn't work, try again with no arguments */
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&1) == 0 && (smg$get_term_data( /* Get terminal data */
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&termtype, /* Terminal table address */
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&request_code, /* Request code */
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&max_buffer_length, /* Maximum buffer length */
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&ret_length, /* Return length */
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buffer)
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/* Capability data buffer */
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/* Return NULL pointer if capability is not available */
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&1) == 0)
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return NULL;
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/* Check for empty result */
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if (ret_length == 0)
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return NULL;
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/* Save current position so we can return it to caller */
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result = buffer;
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/* NIL terminate the sequence for return */
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buffer[ret_length] = 0;
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/* Advance buffer */
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buffer += ret_length + 1;
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/* Return capability to user */
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return result;
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}
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/** I/O information block definitions **/
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struct iosb { /* I/O status block */
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short i_cond; /* Condition value */
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short i_xfer; /* Transfer count */
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long i_info; /* Device information */
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};
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struct termchar { /* Terminal characteristics */
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char t_class; /* Terminal class */
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char t_type; /* Terminal type */
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short t_width; /* Terminal width in characters */
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long t_mandl; /* Terminal's mode and length */
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long t_extend; /* Extended terminal characteristics */
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};
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static struct termchar tc; /* Terminal characteristics */
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/***
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* vmsgtty - Get terminal type from system control block
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*
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* Nothing returned
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***/
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vmsgtty()
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{
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short fd;
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int status;
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struct iosb iostatus;
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$DESCRIPTOR(devnam, "SYS$INPUT");
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/* Assign input to a channel */
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status = sys$assign(&devnam, &fd, 0, 0);
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if ((status & 1) == 0)
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exit(status);
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/* Get terminal characteristics */
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status = sys$qiow( /* Queue and wait */
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0, /* Wait on event flag zero */
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fd, /* Channel to input terminal */
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IO$_SENSEMODE, /* Get current characteristic */
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&iostatus, /* Status after operation */
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0, 0, /* No AST service */
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&tc, /* Terminal characteristics buf */
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sizeof(tc), /* Size of the buffer */
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0, 0, 0, 0); /* P3-P6 unused */
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/* De-assign the input device */
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if ((sys$dassgn(fd) & 1) == 0)
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exit(status);
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/* Jump out if bad status */
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if ((status & 1) == 0)
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exit(status);
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if ((iostatus.i_cond & 1) == 0)
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exit(iostatus.i_cond);
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}
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/***
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* vmsopen - Get terminal type and open terminal
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*
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* Nothing returned
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***/
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vmsopen()
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{
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/* Get terminal type */
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vmsgtty();
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if (tc.t_type == TT$_UNKNOWN) {
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printf("Terminal type is unknown!\n");
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printf
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("Try set your terminal type with SET TERMINAL/INQUIRE\n");
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printf("Or get help on SET TERMINAL/DEVICE_TYPE\n");
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exit(3);
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}
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/* Access the system terminal definition table for the */
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/* information of the terminal type returned by IO$_SENSEMODE */
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if ((smg$init_term_table_by_type(&tc.t_type, &termtype) & 1) == 0)
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return -1;
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/* Set sizes */
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term.t_nrow = ((unsigned int) tc.t_mandl >> 24) - 1;
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term.t_ncol = tc.t_width;
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/* Get some capabilities */
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begin_reverse = vmsgetstr(SMG$K_BEGIN_REVERSE);
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end_reverse = vmsgetstr(SMG$K_END_REVERSE);
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revexist = begin_reverse != NULL && end_reverse != NULL;
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erase_to_end_line = vmsgetstr(SMG$K_ERASE_TO_END_LINE);
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eolexist = erase_to_end_line != NULL;
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erase_whole_display = vmsgetstr(SMG$K_ERASE_WHOLE_DISPLAY);
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#if SCROLLCODE
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scroll_forward = vmsgetstr(SMG$K_SCROLL_FORWARD);
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scroll_reverse = vmsgetstr(SMG$K_SCROLL_REVERSE);
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if (tc.t_type < TT$_VT100 || scroll_reverse == NULL ||
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scroll_forward == NULL)
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term.t_scroll = NULL;
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else
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term.t_scroll = vmsscroll_reg;
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#endif
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/* Set resolution */
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strcpy(sres, "NORMAL");
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/* Open terminal I/O drivers */
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ttopen();
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}
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/***
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* vmskopen - Open keyboard (not used)
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*
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* Nothing returned
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***/
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vmskopen()
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{
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}
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/***
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* vmskclose - Close keyboard (not used)
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*
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* Nothing returned
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***/
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vmskclose()
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{
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}
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/***
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* fnclabel - Label function keys (not used)
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*
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* Nothing returned
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***/
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#if FNLABEL
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fnclabel(f, n) /* label a function key */
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int f, n; /* default flag, numeric argument [unused] */
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{
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/* on machines with no function keys...don't bother */
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return TRUE;
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}
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#endif
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/***
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* spal - Set palette type (Are you kidding?)
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*
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* Nothing returned
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***/
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spal()
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{
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}
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#endif
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