133 lines
3.4 KiB
C
133 lines
3.4 KiB
C
/***********************************************************************/
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/* */
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/* Objective Caml */
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/* */
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/* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
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/* */
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/* Copyright 1996 Institut National de Recherche en Informatique et */
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/* en Automatique. All rights reserved. This file is distributed */
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/* under the terms of the GNU Library General Public License, with */
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/* the special exception on linking described in file ../LICENSE. */
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/* */
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/***********************************************************************/
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/* $Id$ */
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/* Read and output terminal commands */
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#include "config.h"
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#include "alloc.h"
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#include "fail.h"
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#include "io.h"
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#include "mlvalues.h"
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#define Uninitialised (Val_int(0))
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#define Bad_term (Val_int(1))
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#define Good_term_tag 0
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#if defined (HAS_TERMCAP) && !defined (NATIVE_CODE)
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extern int tgetent (char * buffer, char * name);
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extern char * tgetstr (char * id, char ** area);
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extern int tgetnum (char * id);
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extern int tputs (char * str, int count, int (*outchar)(int c));
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static struct channel *chan;
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static char area [1024];
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static char *area_p = area;
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static int num_lines;
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static char *up = NULL;
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static char *down = NULL;
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static char *standout = NULL;
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static char *standend = NULL;
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CAMLprim value terminfo_setup (value vchan)
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{
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value result;
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static char buffer[1024];
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char *term;
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chan = Channel (vchan);
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term = getenv ("TERM");
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if (term == NULL) return Bad_term;
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if (tgetent(buffer, term) != 1) return Bad_term;
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num_lines = tgetnum ("li");
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up = tgetstr ("up", &area_p);
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down = tgetstr ("do", &area_p);
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standout = tgetstr ("us", &area_p);
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standend = tgetstr ("ue", &area_p);
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if (standout == NULL || standend == NULL){
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standout = tgetstr ("so", &area_p);
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standend = tgetstr ("se", &area_p);
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}
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Assert (area_p <= area + 1024);
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if (num_lines == -1 || up == NULL || down == NULL
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|| standout == NULL || standend == NULL){
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return Bad_term;
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}
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result = alloc_small (1, Good_term_tag);
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Field (result, 0) = Val_int (num_lines);
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return result;
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}
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static int terminfo_putc (int c)
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{
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putch (chan, c);
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return c;
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}
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CAMLprim value terminfo_backup (value lines)
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{
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int i;
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for (i = 0; i < Int_val (lines); i++){
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tputs (up, 1, terminfo_putc);
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}
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return Val_unit;
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}
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CAMLprim value terminfo_standout (value start)
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{
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tputs (Bool_val (start) ? standout : standend, 1, terminfo_putc);
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return Val_unit;
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}
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CAMLprim value terminfo_resume (value lines)
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{
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int i;
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for (i = 0; i < Int_val (lines); i++){
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tputs (down, 1, terminfo_putc);
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}
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return Val_unit;
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}
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#else /* defined (HAS_TERMCAP) && !defined (NATIVE_CODE) */
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CAMLexport value terminfo_setup (value vchan)
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{
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return Bad_term;
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}
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CAMLexport value terminfo_backup (value lines)
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{
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invalid_argument("Terminfo.backup");
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return Val_unit;
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}
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CAMLexport value terminfo_standout (value start)
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{
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invalid_argument("Terminfo.standout");
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return Val_unit;
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}
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CAMLexport value terminfo_resume (value lines)
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{
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invalid_argument("Terminfo.resume");
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return Val_unit;
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}
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#endif /* defined (HAS_TERMCAP) && !defined (NATIVE_CODE) */
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