Nebula 1994 June/NEBULA_SE.ISO/SourceCode/MiscKit/Source/MiscStringComparing.m

Text File | 1994-02-07 | 5.2 KB | 190 lines

//
//    MiscStringComparing.m
//        Written by Don Yacktman (c) 1993 by Don Yacktman.
//                Version 1.7  All rights reserved.
//        This notice may not be removed from this source code.
//
//    This object is included in the MiscKit by permission from the author
//    and its use is governed by the MiscKit license, found in the file
//    "LICENSE.rtf" in the MiscKit distribution.  Please refer to that file
//    for a list of all applicable permissions and restrictions.
//

#import <misckit/MiscString.h>

@implementation MiscString(Comparing)

// This category is composed of methods which compare
// MiscStrings with other strings.

- (BOOL)isEqual:anObject
{
    if (anObject == self) return YES;
    // doesn't have to be a MiscString object to be equal...
    if ([anObject respondsTo:@selector(stringValue)]) {
        if (!NXOrderStrings((unsigned char *)buffer,
                (unsigned char *)[anObject stringValue],
                YES, -1, orderTable)) return YES;
    }
    return NO;
}

- (unsigned int)hash
// Use the NextStep string hashing functiuon NXStrHash()  instead of
// the pointer hashing function.
{
    return NXStrHash(NULL, buffer);
}

- (int)compareTo:sender
{
    return [self compareTo:sender n:(-1) caseSensitive:YES];
}

- (int)compareTo:sender n:(int)n
{
    return [self compareTo:sender n:n caseSensitive:YES];
}

- (int)cmp:(const char *)aString
{
    if (!aString && !buffer) return 0;        // both NULL, so "equal"
    if (!aString) return 1;    // only one is NULL, so not equal
    if (!buffer) return -1;    // only one is NULL, so not equal
    return strcmp(buffer, aString);
}

- (int)cmp:(const char *)aString n:(int)n
{
    if (!aString && !buffer) return 0;        // both NULL, so "equal"
    if (!aString) return 1;    // only one is NULL, so not equal
    if (!buffer) return -1;    // only one is NULL, so not equal
    // we don't check n; use strncmp's behavior here.
    return strncmp(buffer, aString, n);
}

- (int)compareTo:sender caseSensitive:(BOOL)sense
{
    return [self compareTo:sender n:(-1) caseSensitive:sense];
}

- (int)compareTo:sender n:(int)n caseSensitive:(BOOL)sense
{
    const char *s; int senderLength, size = n;
    if (!sender) {
        if (!buffer) return 0;
        return 1;
    }
    if (![sender respondsTo:@selector(stringValue)]) return 1; // !=
    s = [sender stringValue];
    if (!buffer && !s) return 0;        // both are NULL
    if (!buffer) return -1;    // buffer is NULL
    if (!s) return 1;    // sender is NULL
    if ([sender respondsTo:@selector(length)]) senderLength = [sender length];
    else senderLength = strlen(s);
    if ((size > length) || (size > senderLength))  {
        size = MIN(length, senderLength);
        if (!size) if (senderLength) return -1;
        else if (length) return 1;
        else return 0;
    }
    return NXOrderStrings((unsigned char *)buffer,
            (unsigned char *)s, sense, size, orderTable);
}

- (int)casecmp:(const char *)aString
{
    if (!aString && !buffer) return 0;        // both NULL, so "equal"
    if (!aString || !buffer) return -1;    // only one is NULL, so not equal
    return strcasecmp(buffer, aString);
}

- (int)casecmp:(const char *)aString n:(int)n
{
    if (!aString && !buffer) return 0;        // both NULL, so "equal"
    if (!aString || !buffer) return -1;    // only one is NULL, so not equal
    // we don't check n; use strncasecmp's behavior here.
    return strncasecmp(buffer, aString, n);
}

- (int)endcmp:(const char *)aString
{
  return [self endcmp:aString n:-1];
}

- (int)endcmp:(const char *)aString n:(int)n
{
  id tempStr;
  int retval;
  if (!aString) return -1;
  tempStr = [[self class] newWithString:aString];
  retval = [self endCompareTo:tempStr n:n caseSensitive:YES];
  [tempStr free];
  return retval;
}

- (int)endcasecmp:(const char *)aString
{
  return [self endcasecmp:aString n:-1];
}

- (int)endcasecmp:(const char *)aString n:(int)n
{
  id tempStr;
  int retval;
  if (!aString) return -1;
  tempStr = [[self class] newWithString:aString];
  retval = [self endCompareTo:tempStr n:n caseSensitive:NO];
  [tempStr free];
  return retval;
}

- (int)endCompareTo:(id)sender
{
  return [self endCompareTo:sender n:-1 caseSensitive:YES];
}

- (int)endCompareTo:(id)sender caseSensitive:(BOOL)sense
{
  return [self endCompareTo:sender n:-1 caseSensitive:sense];
}

- (int)endCompareTo:(id)sender n:(int)n
{
  return [self endCompareTo:sender n:n caseSensitive:YES];
}

- (int)endCompareTo:(id)sender n:(int)n caseSensitive:(BOOL)sense
{ // DAY: fixed it: sender doesn't have to be a MiscString anymore.
    id tempStr, temp2, temp3;
    int retval, smallLen, senderLength;
    const char *s;
    // unlike MOKit, we allow NULL/empty strings, and we adjust n if
    // it is too big.  also, this method is slower than MOKit complement.
    if (!sender) {
        if (!buffer) return 0;
        return 1;
    }
    if (!([sender respondsTo:@selector(stringValue)])) return -1;
    s = [sender stringValue];
    if (!s || !buffer) return -1;
    if ([sender respondsTo:@selector(length)]) senderLength = [sender length];
    else senderLength = strlen(s);
    // find the shorter of the two lengths
    smallLen = ((length >= senderLength) ? senderLength : length);
    if ((n == -1) || (n > smallLen)) n = smallLen;
    tempStr = [self right:n];
    if ([sender respondsTo:@selector(right:)]) temp2 = [sender right:n];
    else {
        temp3 = [[self class] newWithString:[sender stringValue]];
        temp2 = [temp3 right:n];
        [temp3 free];
    }
    retval = [tempStr compareTo:temp2 caseSensitive:sense];
    [tempStr free];
    [temp2 free];
    return retval;
}

@end