X-Git-Url: https://git.stderr.nl/gitweb?a=blobdiff_plain;f=interpreters%2Ffrotz%2Fredirect.c;fp=interpreters%2Ffrotz%2Fredirect.c;h=239e9c43dfa29f378e586364f20c573029c5ae42;hb=b1f1dc50b22b30c4d7176e1ff7c0805e80fe0724;hp=0000000000000000000000000000000000000000;hpb=50176172d18ae72d019181725c5629d45d21c548;p=projects%2Fchimara%2Fchimara.git diff --git a/interpreters/frotz/redirect.c b/interpreters/frotz/redirect.c new file mode 100644 index 0000000..239e9c4 --- /dev/null +++ b/interpreters/frotz/redirect.c @@ -0,0 +1,173 @@ +/* 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 + +/* TOR: glkify -- this is for V6 only */ +static zword get_max_width (zword win) { return 80; } + +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 */