mirror of
https://github.com/DerekK19/PDP-8-E-Simulator.git
synced 2024-05-31 15:41:30 +00:00
165 lines
3.7 KiB
Objective-C
165 lines
3.7 KiB
Objective-C
/*
|
|
* PDP-8/E Simulator
|
|
*
|
|
* Copyright © 1994-2015 Bernhard Baehr
|
|
*
|
|
* MemoryInspector6BitASCII.m - 6-Bit ASCII Memory Inspector
|
|
*
|
|
* This file is part of PDP-8/E Simulator.
|
|
*
|
|
* PDP-8/E Simulator 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 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program 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, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
|
|
#import <Cocoa/Cocoa.h>
|
|
|
|
#import "MemoryInspectorProtocol.h"
|
|
#import "Unicode.h"
|
|
|
|
|
|
#define ORDER_IN_MENU 10
|
|
#define WORDS_PER_ROW 4
|
|
#define CONTENT_WIDTH 8
|
|
#define NEEDS_ALIGNMENT NO
|
|
#define ALLOWS_EDITING YES
|
|
#define MENU_TITLE @"6-Bit ASCII"
|
|
#define TOOL_TIP @"This column displays the memory content as 6-bit ASCII. " \
|
|
"When editing a cell, use " UNICODE_MIDDLE_DOT_UTF8 " (option-shift-9) " \
|
|
"to keep the current value and " UNICODE_BULLET_UTF8 \
|
|
" (option-8 on an English keyboard or option-ü on a German keyboard) to force zero."
|
|
|
|
|
|
@interface MemoryInspector6BitASCII : NSFormatter <MemoryInspector>
|
|
{
|
|
}
|
|
@end
|
|
|
|
|
|
@implementation MemoryInspector6BitASCII
|
|
|
|
|
|
+ (void) load
|
|
{
|
|
/* dummy to load the class when zero-linking while development */
|
|
}
|
|
|
|
|
|
- (NSNumber *) orderInMemoryInspectorMenu
|
|
{
|
|
return [NSNumber numberWithInt:ORDER_IN_MENU];
|
|
}
|
|
|
|
|
|
- (NSString *) menuTitle
|
|
{
|
|
return NSLocalizedString(MENU_TITLE, @"");
|
|
}
|
|
|
|
|
|
- (unsigned) wordsPerRow
|
|
{
|
|
return WORDS_PER_ROW;
|
|
}
|
|
|
|
|
|
- (unsigned) contentWidthInCharacters
|
|
{
|
|
return CONTENT_WIDTH;
|
|
}
|
|
|
|
|
|
- (BOOL) needsMemoryAlignment
|
|
{
|
|
return NEEDS_ALIGNMENT;
|
|
}
|
|
|
|
|
|
- (BOOL) allowsEditing
|
|
{
|
|
return ALLOWS_EDITING;
|
|
}
|
|
|
|
|
|
- (NSString *) toolTipForContentColumn
|
|
{
|
|
return NSLocalizedString(TOOL_TIP, @"");
|
|
}
|
|
|
|
|
|
- (NSString *) stringForObjectValue:(NSArray *)value
|
|
{
|
|
if ([[value class] isSubclassOfClass:[NSString class]])
|
|
return (NSString *) value;
|
|
NSAssert ([value count] == WORDS_PER_ROW, @"Invalid number of words to format");
|
|
NSMutableString *string = [NSMutableString stringWithCapacity:8];
|
|
int i;
|
|
for (i = 0; i < WORDS_PER_ROW; i++) {
|
|
unsigned short c1 = [[value objectAtIndex:i] intValue];
|
|
unsigned short c0 = c1 >> 6;
|
|
if (c0 == 0)
|
|
c0 = UNICODE_MIDDLE_DOT;
|
|
else if (c0 < 040)
|
|
c0 |= 0100;
|
|
c1 &= 077;
|
|
if (c1 == 0)
|
|
c1 = UNICODE_MIDDLE_DOT;
|
|
else if (c1 < 040)
|
|
c1 |= 0100;
|
|
[string appendFormat:@"%C%C", c0, c1];
|
|
}
|
|
return string;
|
|
}
|
|
|
|
|
|
- (BOOL) getObjectValue:(id *)value forString:(NSString *)string errorDescription:(NSString **)error
|
|
{
|
|
int i, c0, c1, m0, m1;
|
|
|
|
if ([string length] != CONTENT_WIDTH) {
|
|
if (error)
|
|
*error = NSLocalizedString(@"Exactly eight characters required.", @"");
|
|
return FALSE;
|
|
}
|
|
m1 = c1 = 0; // only to avoid "used uninitialized" compiler warning
|
|
NSMutableArray *val = [NSMutableArray arrayWithCapacity:WORDS_PER_ROW];
|
|
for (i = 0; i < CONTENT_WIDTH; i++) {
|
|
c0 = [string characterAtIndex:i];
|
|
m0 = 0770000;
|
|
if (c0 == UNICODE_MIDDLE_DOT) // don't care, save old value
|
|
c0 = m0 = 0;
|
|
else if (c0 == UNICODE_BULLET) // force zero
|
|
c0 = 0;
|
|
else if (040 <= c0 && c0 < 0140)
|
|
c0 &= 077;
|
|
else {
|
|
if (error)
|
|
*error = [NSString stringWithFormat:NSLocalizedString(
|
|
@"Invalid 6-bit ASCII character %C%C%C.", @""),
|
|
UNICODE_LEFT_DOUBLEQUOTE, c0, UNICODE_RIGHT_DOUBLEQUOTE];
|
|
return FALSE;
|
|
}
|
|
if (i & 1)
|
|
[val addObject:[NSNumber numberWithInt:m1 | m0 | c1 | c0]];
|
|
else {
|
|
c1 = c0 << 6;
|
|
m1 = m0 << 6;
|
|
}
|
|
}
|
|
*value = val;
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
@end
|