ncurses 5.0

[ncurses.git] / ncurses / tinfo / lib_print.c

diff --git a/ncurses/tinfo/lib_print.c b/ncurses/tinfo/lib_print.c
new file mode 100644 (file)
index 0000000..63ac648
--- /dev/null
+++ b/ncurses/tinfo/lib_print.c
@@ -0,0 +1,96 @@
+/****************************************************************************
+ * Copyright (c) 1998 Free Software Foundation, Inc.                        *
+ *                                                                          *
+ * Permission is hereby granted, free of charge, to any person obtaining a  *
+ * copy of this software and associated documentation files (the            *
+ * "Software"), to deal in the Software without restriction, including      *
+ * without limitation the rights to use, copy, modify, merge, publish,      *
+ * distribute, distribute with modifications, sublicense, and/or sell       *
+ * copies of the Software, and to permit persons to whom the Software is    *
+ * furnished to do so, subject to the following conditions:                 *
+ *                                                                          *
+ * The above copyright notice and this permission notice shall be included  *
+ * in all copies or substantial portions of the Software.                   *
+ *                                                                          *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
+ * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
+ * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
+ *                                                                          *
+ * Except as contained in this notice, the name(s) of the above copyright   *
+ * holders shall not be used in advertising or otherwise to promote the     *
+ * sale, use or other dealings in this Software without prior written       *
+ * authorization.                                                           *
+ ****************************************************************************/
+
+/****************************************************************************
+ *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
+ *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
+ ****************************************************************************/
+
+
+#include <curses.priv.h>
+
+#include <term.h>
+
+MODULE_ID("$Id: lib_print.c,v 1.11 1999/02/27 19:59:05 tom Exp $")
+
+int mcprint(char *data, int len)
+/* ship binary character data to the printer via mc4/mc5/mc5p */
+{
+    char       *mybuf, *switchon;
+    size_t     onsize, offsize, res;
+
+    errno = 0;
+    if (!cur_term || (!prtr_non && (!prtr_on || !prtr_off)))
+    {
+       errno = ENODEV;
+       return(ERR);
+    }
+
+    if (prtr_non)
+    {
+       switchon = tparm(prtr_non, len);
+       onsize = strlen(switchon);
+       offsize = 0;
+    }
+    else
+    {
+       switchon = prtr_on;
+       onsize = strlen(prtr_on);
+       offsize = strlen(prtr_off);
+    }
+
+    if ((mybuf = typeMalloc(char, onsize + len + offsize + 1)) == (char *)0)
+    {
+       errno = ENOMEM;
+       return(ERR);
+    }
+
+    (void) strcpy(mybuf, switchon);
+    memcpy(mybuf + onsize, data, len);
+    if (offsize)
+      (void) strcpy(mybuf + onsize + len, prtr_off);
+
+    /*
+     * We're relying on the atomicity of UNIX writes here.  The
+     * danger is that output from a refresh() might get interspersed
+     * with the printer data after the write call returns but before the
+     * data has actually been shipped to the terminal.  If the write(2)
+     * operation is truly atomic we're protected from this.
+     */
+    res = write(cur_term->Filedes, mybuf, onsize + len + offsize);
+
+    /*
+     * By giving up our scheduler slot here we increase the odds that the
+     * kernel will ship the contiguous clist items from the last write
+     * immediately.
+     */
+    (void) sleep(0);
+
+    free(mybuf);
+    return(res);
+}