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Location: libtransport.git/backends/frotz/dfrotz/common/redirect.c
a22b6e149063
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Finished frotz backend :)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 | /* 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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