ClassicMacTypography/MacRomanString.m

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2018-05-21 22:04:40 +00:00
//
// MacRomanString.m
// Copyright © 2018 Ben Zotto. All rights reserved.
//
#import "MacRomanString.h"
@interface MacRomanString ()
{
unsigned char * _cstring;
NSUInteger _length;
}
@end
@implementation MacRomanString
- (id)initWithCString:(const char *)cstring
{
if (!cstring) return nil;
if ((self = [super init])) {
self->_length = strlen(cstring);
self->_cstring = (unsigned char *)strdup(cstring);
if (!self->_cstring) {
return nil;
}
}
return self;
}
- (id)initWithCChars:(const char *)cchars length:(NSUInteger)length
{
if (!cchars) return nil;
if ((self = [super init])) {
self->_length = length;
self->_cstring = malloc(length + 1);
if (!self->_cstring) {
return nil;
}
memcpy(self->_cstring, cchars, length);
self->_cstring[length] = '\0';
}
return self;
}
- (void)dealloc
{
if (_cstring) {
free(_cstring);
}
}
- (unsigned char)characterAtIndex:(NSUInteger)index
{
assert(index < self->_length);
return _cstring[index];
}
- (MacRomanString *)substringWithRange:(NSRange)range
{
if (range.location + range.length > self->_length) {
return nil;
}
return [[MacRomanString alloc] initWithCChars:(const char *)&_cstring[range.location] length:range.length];
}
@end
//
// Category
//
@implementation NSString (MacRomanString)
- (MacRomanString *)macRomanString
{
const char * cstr = [self cStringUsingEncoding:NSMacOSRomanStringEncoding];
if (cstr) {
return [[MacRomanString alloc] initWithCString:cstr];
}
return nil;
}
@end