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StringStorage.m
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1994-01-26
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/*
** StringStorage.m,v 1.2 1992/11/08 13:45:25 nwc Exp
**
** Copyright (c) 1991 Ronin Consulting, Inc.
*/
#import "StringStorage.h"
#import <string.h>
static char EOS = (char)0;
@implementation StringStorage
- init
{
[self init: ""];
return self;
}
- init: (const char *) str
{
[super init];
[self initCount: 0 elementSize: sizeof(char) description: "c"];
[self setStringValue: str];
return self;
}
- setStringValue: (const char *) str;
{
int len;
if(!str)
str = ""; /* avoid nil strings */
len = strlen(str); /* get length - no reason to do it twice */
[self setNumSlots: len + 1]; /* use setNumSlots vs setAvailCapacity since it sets count */
/* bcopy is far faster than strcpy if the length is known */
bcopy(str, (char *)dataPtr, len);
[self replaceElementAt: len with: (char *)&EOS];
return self;
}
- (const char *) stringValue
{
return dataPtr;
}
- appendStringValue: (const char *)str
{
int oldCount = [self count];
int len;
if(!str || !*str) /* nothing to append */
return self;
len = strlen(str);
[self setNumSlots: oldCount + len];
bcopy(str, (char *)[self elementAt: oldCount - 1], len);
[self replaceElementAt: oldCount + len -1 with: (char *)&EOS];
return self;
}
- appendCharValue: (char) c
{
char buf[2];
buf[0] = c;
buf[1] = (char)0;
[self appendStringValue: buf];
return self;
}
@end