git @ Cat's Eye Technologies Zplet / master src / main / java / org / zplet / zmachine / zmachine5 / ZHeader5.java
master

Tree @master (Download .tar.gz)

ZHeader5.java @master — raw · history · blame 

  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
173
174
175
/* Zplet, a Z-Machine interpreter in Java */
/* Copyright 1996,2001 Matthew T. Russotto */
/* As of 23 February 2001, this code is open source and covered by the */
/* Artistic License, found within this package */

package org.zplet.zmachine.zmachine5;

import org.zplet.zmachine.ZHeader;

class ZHeader5 extends ZHeader {
	final static int INTERP_NUMBER = 0x1E;
	final static int INTERP_VERSION = 0x1F;
	final static int SCREEN_HEIGHT_LINES = 0x20;
	final static int SCREEN_WIDTH_CHARACTERS = 0x21;
	final static int SCREEN_WIDTH_UNITS = 0x22;
	final static int SCREEN_HEIGHT_UNITS = 0x24;
	final static int FONT_HEIGHT_UNITS = 0x26;
	final static int FONT_WIDTH_UNITS = 0x27;
	final static int DEFAULT_BACKGROUND_COLOR = 0x2C;
	final static int DEFAULT_FOREGROUND_COLOR = 0x2D;

	final static int FILE_LENGTH_FACTOR = 4;

	/* interpreter numbers */

	final static int INTERP_DEC = 1;
	final static int INTERP_APPLEIIE = 2;
	final static int INTERP_MAC = 3;
	final static int INTERP_AMIGA = 4;
	final static int INTERP_ATARIST = 5;
	final static int INTERP_MSDOS = 6;
	final static int INTERP_C128 = 7;
	final static int INTERP_C64 = 8;
	final static int INTERP_APPLEIIC = 9;
	final static int INTERP_APPLEIIGS = 10;
	final static int INTERP_COCO = 11;

	public ZHeader5(byte[] memory_image) {
		this.memory_image = memory_image;
	}

	public void set_colors_available(boolean avail) {
		if (avail)
			memory_image[FLAGS1] |= 0x01;
		else {
			memory_image[FLAGS1] &= 0xFE;
		}
	}

	public void set_bold_available(boolean avail) {
		if (avail)
			memory_image[FLAGS1] |= 0x04;
		else
			memory_image[FLAGS1] &= 0xFB;
	}

	public void set_italic_available(boolean avail) {
		if (avail)
			memory_image[FLAGS1] |= 0x08;
		else
			memory_image[FLAGS1] &= 0xF7;
	}

	public void set_fixed_font_available(boolean avail) {
		if (avail)
			memory_image[FLAGS1] |= 0x10;
		else
			memory_image[FLAGS1] &= 0xEF;
	}

	public void set_timed_input_available(boolean avail) {
		if (avail)
			memory_image[FLAGS1] |= 0x80;
		else
			memory_image[FLAGS1] &= 0x7F;
	}

	public boolean graphics_font_wanted() { /* Called pictures in spec */
		return (memory_image[FLAGS2 + 1] & 0x08) != 0;
	}

	public void set_graphics_font_available(boolean avail) {
		if (!avail)
			memory_image[FLAGS2 + 1] &= 0xF7;
	}

	public boolean undo_wanted() {
		return (memory_image[FLAGS2 + 1] & 0x10) != 0;
	}

	void set_undo_available(boolean avail) {
		if (!avail)
			memory_image[FLAGS2 + 1] &= 0xEF;
	}

	public boolean mouse_wanted() {
		return (memory_image[FLAGS2 + 1] & 0x20) != 0;
	}

	public void set_mouse_available(boolean avail) {
		if (!avail)
			memory_image[FLAGS2 + 1] &= 0xDF;
	}

	public boolean colors_wanted() {
		return (memory_image[FLAGS2 + 1] & 0x40) != 0;
	}

	public boolean sound_wanted() {
		return (memory_image[FLAGS2 + 1] & 0x80) != 0;
	}

	public void set_sound_available(boolean avail) {
		if (!avail)
			memory_image[FLAGS2 + 1] &= 0x7F;
	}

	public void set_interpreter_number(int number) {
		memory_image[INTERP_NUMBER] = (byte) number;
	}

	public void set_interpreter_version(int version) {
		memory_image[INTERP_VERSION] = (byte) version;
	}

	public void set_screen_height_lines(int lines) {
		memory_image[SCREEN_HEIGHT_LINES] = (byte) lines;
	}

	public void set_screen_width_characters(int characters) {
		memory_image[SCREEN_WIDTH_CHARACTERS] = (byte) characters;
	}

	public void set_screen_height_units(int units) {
		memory_image[SCREEN_HEIGHT_UNITS] = (byte) (units >> 8);
		memory_image[SCREEN_HEIGHT_UNITS + 1] = (byte) (units & 0xFF);
	}

	public void set_screen_width_units(int units) {
		memory_image[SCREEN_WIDTH_UNITS] = (byte) (units >> 8);
		memory_image[SCREEN_WIDTH_UNITS + 1] = (byte) (units & 0xFF);
	}

	public void set_font_height_units(int units) {
		memory_image[FONT_HEIGHT_UNITS] = (byte) units;
	}

	public void set_font_width_units(int units) {
		memory_image[FONT_WIDTH_UNITS] = (byte) units;
	}

	public int default_background_color() {
		return memory_image[DEFAULT_BACKGROUND_COLOR];
	}

	public int default_foreground_color() {
		return memory_image[DEFAULT_FOREGROUND_COLOR];
	}

	public void set_default_background_color(int color) {
		memory_image[DEFAULT_BACKGROUND_COLOR] = (byte) color;
	}

	public void set_default_foreground_color(int color) {
		memory_image[DEFAULT_FOREGROUND_COLOR] = (byte) color;
	}

	@Override
	public int file_length() {
		int packed_length;

		packed_length = (((memory_image[FILE_LENGTH] & 0xFF) << 8) | (memory_image[FILE_LENGTH + 1] & 0xFF));
		return packed_length * FILE_LENGTH_FACTOR;
	}
}