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-rw-r--r--apps/plugins/frotz/redirect.c172
1 files changed, 172 insertions, 0 deletions
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 */