ncurses/tinfo/lib_print.c

   1 /****************************************************************************
   2  * Copyright (c) 1998-2009,2010 Free Software Foundation, Inc.              *
   3  *                                                                          *
   4  * Permission is hereby granted, free of charge, to any person obtaining a  *
   5  * copy of this software and associated documentation files (the            *
   6  * "Software"), to deal in the Software without restriction, including      *
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   8  * distribute, distribute with modifications, sublicense, and/or sell       *
   9  * copies of the Software, and to permit persons to whom the Software is    *
  10  * furnished to do so, subject to the following conditions:                 *
  11  *                                                                          *
  12  * The above copyright notice and this permission notice shall be included  *
  13  * in all copies or substantial portions of the Software.                   *
  14  *                                                                          *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
  16  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
  18  * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
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  21  * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
  22  *                                                                          *
  23  * Except as contained in this notice, the name(s) of the above copyright   *
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  26  * authorization.                                                           *
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  28
  29 /****************************************************************************
  30  *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
  31  *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
  32  *     and: Thomas E. Dickey                        1996-on                 *
  33  *     and: Juergen Pfeifer                                                 *
  34  ****************************************************************************/
  35
  36 #include <curses.priv.h>
  37
  38 #ifndef CUR
  39 #define CUR SP_TERMTYPE
  40 #endif
  41
  42 MODULE_ID("$Id: lib_print.c,v 1.20 2010/06/05 22:18:35 tom Exp $")
  43
  44 NCURSES_EXPORT(int)
  45 NCURSES_SP_NAME(mcprint) (NCURSES_SP_DCLx char *data, int len)
  46 /* ship binary character data to the printer via mc4/mc5/mc5p */
  47 {
  48     int result;
  49     char *mybuf, *switchon;
  50     size_t onsize, offsize;
  51     size_t need;
  52
  53     errno = 0;
  54     if (!HasTInfoTerminal(SP_PARM)
  55         || len <= 0
  56         || (!prtr_non && (!prtr_on || !prtr_off))) {
  57         errno = ENODEV;
  58         return (ERR);
  59     }
  60
  61     if (prtr_non) {
  62         switchon = TPARM_1(prtr_non, len);
  63         onsize = strlen(switchon);
  64         offsize = 0;
  65     } else {
  66         switchon = prtr_on;
  67         onsize = strlen(prtr_on);
  68         offsize = strlen(prtr_off);
  69     }
  70
  71     need = onsize + (size_t) len + offsize;
  72
  73     if (switchon == 0
  74         || (mybuf = typeMalloc(char, need + 1)) == 0) {
  75         errno = ENOMEM;
  76         return (ERR);
  77     }
  78
  79     (void) strcpy(mybuf, switchon);
  80     memcpy(mybuf + onsize, data, (unsigned) len);
  81     if (offsize)
  82         (void) strcpy(mybuf + onsize + len, prtr_off);
  83
  84     /*
  85      * We're relying on the atomicity of UNIX writes here.  The
  86      * danger is that output from a refresh() might get interspersed
  87      * with the printer data after the write call returns but before the
  88      * data has actually been shipped to the terminal.  If the write(2)
  89      * operation is truly atomic we're protected from this.
  90      */
  91     result = (int) write(TerminalOf(SP_PARM)->Filedes, mybuf, need);
  92
  93     /*
  94      * By giving up our scheduler slot here we increase the odds that the
  95      * kernel will ship the contiguous clist items from the last write
  96      * immediately.
  97      */
  98 #ifndef __MINGW32__
  99     (void) sleep(0);
 100 #endif
 101     free(mybuf);
 102     return (result);
 103 }
 104
 105 #if NCURSES_SP_FUNCS && !defined(USE_TERM_DRIVER)
 106 NCURSES_EXPORT(int)
 107 mcprint(char *data, int len)
 108 {
 109     return NCURSES_SP_NAME(mcprint) (CURRENT_SCREEN, data, len);
 110 }
 111 #endif