79 lines
1.6 KiB
Objective-C
79 lines
1.6 KiB
Objective-C
//
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// MacRomanString.m
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// Copyright © 2018 Ben Zotto. All rights reserved.
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//
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#import "MacRomanString.h"
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@interface MacRomanString ()
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{
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unsigned char * _cstring;
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NSUInteger _length;
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}
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@end
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@implementation MacRomanString
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- (id)initWithCString:(const char *)cstring
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{
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if (!cstring) return nil;
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if ((self = [super init])) {
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self->_length = strlen(cstring);
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self->_cstring = (unsigned char *)strdup(cstring);
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if (!self->_cstring) {
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return nil;
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}
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}
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return self;
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}
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- (id)initWithCChars:(const char *)cchars length:(NSUInteger)length
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{
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if (!cchars) return nil;
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if ((self = [super init])) {
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self->_length = length;
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self->_cstring = malloc(length + 1);
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if (!self->_cstring) {
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return nil;
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}
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memcpy(self->_cstring, cchars, length);
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self->_cstring[length] = '\0';
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}
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return self;
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}
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- (void)dealloc
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{
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if (_cstring) {
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free(_cstring);
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}
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}
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- (unsigned char)characterAtIndex:(NSUInteger)index
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{
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assert(index < self->_length);
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return _cstring[index];
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}
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- (MacRomanString *)substringWithRange:(NSRange)range
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{
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if (range.location + range.length > self->_length) {
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return nil;
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}
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return [[MacRomanString alloc] initWithCChars:(const char *)&_cstring[range.location] length:range.length];
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}
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@end
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//
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// Category
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//
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@implementation NSString (MacRomanString)
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- (MacRomanString *)macRomanString
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{
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const char * cstr = [self cStringUsingEncoding:NSMacOSRomanStringEncoding];
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if (cstr) {
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return [[MacRomanString alloc] initWithCString:cstr];
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}
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return nil;
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}
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@end
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