From 7f28c94eda576e3f972fc05468188986f2e45885 Mon Sep 17 00:00:00 2001
From: Torne Wuff <torne@wolfpuppy.org.uk>
Date: Sun, 17 Jan 2010 22:15:13 +0000
Subject: New plugin: frotz, a Z-machine interpreter, for playing interactive
 fiction.

The interpreter more or less passes all the tests in the z-machine test suite.
It should build for every target except Archos (for which it is disabled).


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@24267 a1c6a512-1295-4272-9138-f99709370657
---
 apps/plugins/frotz/redirect.c | 172 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 172 insertions(+)
 create mode 100644 apps/plugins/frotz/redirect.c

(limited to 'apps/plugins/frotz/redirect.c')

diff --git a/apps/plugins/frotz/redirect.c b/apps/plugins/frotz/redirect.c
new file mode 100644
index 0000000000..d81776dbcd
--- /dev/null
+++ b/apps/plugins/frotz/redirect.c
@@ -0,0 +1,172 @@
+/* redirect.c - Output redirection to Z-machine memory
+ *	Copyright (c) 1995-1997 Stefan Jokisch
+ *
+ * This file is part of Frotz.
+ *
+ * Frotz 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 of the License, or
+ * (at your option) any later version.
+ *
+ * Frotz 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 02111-1307, USA
+ */
+
+#include "frotz.h"
+
+#define MAX_NESTING 16
+
+extern zword get_max_width (zword);
+
+static int depth = -1;
+
+static struct {
+    zword xsize;
+    zword table;
+    zword width;
+    zword total;
+} redirect[MAX_NESTING];
+
+/*
+ * memory_open
+ *
+ * Begin output redirection to the memory of the Z-machine.
+ *
+ */
+
+void memory_open (zword table, zword xsize, bool buffering)
+{
+
+    if (++depth < MAX_NESTING) {
+
+	if (!buffering)
+	    xsize = 0xffff;
+	if (buffering && (short) xsize <= 0)
+	    xsize = get_max_width ((zword) (- (short) xsize));
+
+	storew (table, 0);
+
+	redirect[depth].table = table;
+	redirect[depth].width = 0;
+	redirect[depth].total = 0;
+	redirect[depth].xsize = xsize;
+
+	ostream_memory = TRUE;
+
+   } else runtime_error (ERR_STR3_NESTING);
+
+}/* memory_open */
+
+/*
+ * memory_new_line
+ *
+ * Redirect a newline to the memory of the Z-machine.
+ *
+ */
+
+void memory_new_line (void)
+{
+    zword size;
+    zword addr;
+
+    redirect[depth].total += redirect[depth].width;
+    redirect[depth].width = 0;
+
+    addr = redirect[depth].table;
+
+    LOW_WORD (addr, size)
+    addr += 2;
+
+    if (redirect[depth].xsize != 0xffff) {
+
+	redirect[depth].table = addr + size;
+	size = 0;
+
+    } else storeb ((zword) (addr + (size++)), 13);
+
+    storew (redirect[depth].table, size);
+
+}/* memory_new_line */
+
+/*
+ * memory_word
+ *
+ * Redirect a string of characters to the memory of the Z-machine.
+ *
+ */
+
+void memory_word (const zchar *s)
+{
+    zword size;
+    zword addr;
+    zchar c;
+
+    if (h_version == V6) {
+
+	int width = os_string_width (s);
+
+	if (redirect[depth].xsize != 0xffff)
+
+	    if (redirect[depth].width + width > redirect[depth].xsize) {
+
+		if (*s == ' ' || *s == ZC_INDENT || *s == ZC_GAP)
+		    width = os_string_width (++s);
+
+		memory_new_line ();
+
+	    }
+
+	redirect[depth].width += width;
+
+    }
+
+    addr = redirect[depth].table;
+
+    LOW_WORD (addr, size)
+    addr += 2;
+
+    while ((c = *s++) != 0)
+	storeb ((zword) (addr + (size++)), translate_to_zscii (c));
+
+    storew (redirect[depth].table, size);
+
+}/* memory_word */
+
+/*
+ * memory_close
+ *
+ * End of output redirection.
+ *
+ */
+
+void memory_close (void)
+{
+
+    if (depth >= 0) {
+
+	if (redirect[depth].xsize != 0xffff)
+	    memory_new_line ();
+
+	if (h_version == V6) {
+
+	    h_line_width = (redirect[depth].xsize != 0xffff) ?
+		redirect[depth].total : redirect[depth].width;
+
+	    SET_WORD (H_LINE_WIDTH, h_line_width)
+
+	}
+
+	if (depth == 0)
+	    ostream_memory = FALSE;
+
+	depth--;
+
+    }
+
+}/* memory_close */
-- 
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