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/* Implementation for GNUStep of NSStrings with C-string backing
Copyright (C) 1993,1994, 1996 Free Software Foundation, Inc.
Written by: Andrew Kachites McCallum <mccallum@gnu.ai.mit.edu>
Date: March 1995
This file is part of the GNUstep Base Library.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <gnustep/base/preface.h>
#include <Foundation/NSString.h>
#include <gnustep/base/NSString.h>
#include <gnustep/base/IndexedCollection.h>
#include <gnustep/base/IndexedCollectionPrivate.h>
#include <gnustep/base/MallocAddress.h>
#include <Foundation/NSValue.h>
#include <gnustep/base/behavior.h>
/* memcpy(), strlen(), strcmp() are gcc builtin's */
@implementation NSGCString
/* This is the designated initializer for this class. */
- (id) initWithCStringNoCopy: (char*)byteString
length: (unsigned int)length
freeWhenDone: (BOOL)flag
{
/* assert(!flag); xxx need to make a subclass to handle this. */
_count = length;
_contents_chars = byteString;
_free_contents = flag;
return self;
}
- (void) _collectionReleaseContents
{
return;
}
- (void) _collectionDealloc
{
if (_free_contents)
OBJC_FREE(_contents_chars);
}
- (Class) classForConnectedCoder: aRmc
{
/* Make sure that Connection's always send us bycopy,
i.e. as our own class, not a Proxy class. */
return [self class];
}
- (void) encodeWithCoder: aCoder
{
[aCoder encodeValueOfObjCType:@encode(char*) at:&_contents_chars
withName:@"Concrete String content_chars"];
}
- initWithCoder: aCoder
{
[super initWithCoder:aCoder];
[aCoder decodeValueOfObjCType:@encode(char*) at:&_contents_chars
withName:NULL];
_count = strlen(_contents_chars);
_free_contents = YES;
return self;
}
/* Empty copy must empty an allocCopy'ed version of self */
- emptyCopy
{
NSGCString *copy = [super emptyCopy];
OBJC_MALLOC(copy->_contents_chars, char, _count+1);
copy->_count = 0;
copy->_contents_chars[0] = '\0';
return copy;
}
- (const char *) cString
{
char *r;
OBJC_MALLOC(r, char, _count+1);
memcpy(r, _contents_chars, _count);
r[_count] = '\0';
[[[MallocAddress alloc] initWithAddress:r] autorelease];
return r;
}
- (const char *) cStringNoCopy
{
return _contents_chars;
}
/* xxx Remove this method, now that we have cStringNoCopy */
- (const char *) _cStringContents
{
return _contents_chars;
}
- (unsigned) count
{
return _count;
}
- (unsigned int) cStringLength
{
return _count;
}
- (unichar) characterAtIndex: (unsigned int)index
{
/* xxx This should raise an NSException. */
CHECK_INDEX_RANGE_ERROR(index, _count);
return (unichar) _contents_chars[index];
}
// FOR IndexedCollection SUPPORT;
- objectAtIndex: (unsigned)index
{
CHECK_INDEX_RANGE_ERROR(index, _count);
return [NSNumber numberWithChar: _contents_chars[index]];
}
@end
@implementation NSGMutableCString
+ (void) initialize
{
static int done = 0;
if (!done)
{
done = 1;
class_add_behavior(self, [NSGCString class]);
}
}
typedef struct {
@defs(NSGMutableCString)
} NSGMutableCStringStruct;
static inline void
stringIncrementCountAndMakeHoleAt(NSGMutableCStringStruct *self,
int index, int size)
{
#ifndef STABLE_MEMCPY
{
int i;
for (i = self->_count; i >= index; i--)
self->_contents_chars[i+size] = self->_contents_chars[i];
}
#else
memcpy(self->_contents_chars + index,
self->_contents_chars + index + size,
self->_count - index);
#endif /* STABLE_MEMCPY */
(self->_count) += size;
}
static inline void
stringDecrementCountAndFillHoleAt(NSGMutableCStringStruct *self,
int index, int size)
{
(self->_count) -= size;
#ifndef STABLE_MEMCPY
{
int i;
for (i = index; i <= self->_count; i++)
self->_contents_chars[i] = self->_contents_chars[i+size];
}
#else
memcpy(self->_contents_chars + index + size,
self->_contents_chars + index,
self->_count - index);
#endif /* STABLE_MEMCPY */
}
/* This is the designated initializer for this class */
/* xxx Should capacity include the '\0' terminator? */
- initWithCapacity: (unsigned)capacity
{
_count = 0;
_capacity = MAX(capacity, 2);
OBJC_MALLOC(_contents_chars, char, _capacity);
_contents_chars[0] = '\0';
_free_contents = YES;
return self;
}
- (void) deleteCharactersInRange: (NSRange)range
{
stringDecrementCountAndFillHoleAt((NSGMutableCStringStruct*)self,
range.location, range.length);
}
- (void) insertString: (NSString*)aString atIndex:(unsigned)index
{
unsigned c = [aString cStringLength];
if (_count + c >= _capacity)
{
_capacity = MAX(_capacity*2, _count+c);
OBJC_REALLOC(_contents_chars, char, _capacity);
}
stringIncrementCountAndMakeHoleAt((NSGMutableCStringStruct*)self, index, c);
memcpy(_contents_chars + index, [aString _cStringContents], c);
_contents_chars[_count] = '\0';
}
/* xxx This method may be removed in future. */
- (void) setCString: (const char *)byteString length: (unsigned)length
{
if (_capacity < length+1)
{
_capacity = length+1;
OBJC_REALLOC(_contents_chars, char, _capacity);
}
memcpy(_contents_chars, byteString, length);
_contents_chars[length] = '\0';
_count = length;
}
/* Override NSString's designated initializer for CStrings. */
- (id) initWithCStringNoCopy: (char*)byteString
length: (unsigned int)length
freeWhenDone: (BOOL)flag
{
[self initWithCapacity:length];
[self setCString:byteString length:length];
return self;
}
/* For IndexedCollecting Protocol and other GNU libobjects conformity. */
/* xxx This should be made to return void, but we need to change
IndexedCollecting and its conformers */
- (void) removeRange: (IndexRange)range
{
stringDecrementCountAndFillHoleAt((NSGMutableCStringStruct*)self,
range.location, range.length);
}
- (void) encodeWithCoder: aCoder
{
[aCoder encodeValueOfObjCType:@encode(unsigned) at:&_capacity
withName:@"String capacity"];
[aCoder encodeValueOfObjCType:@encode(char*) at:&_contents_chars
withName:@"String content_chars"];
}
- initWithCoder: aCoder
{
unsigned cap;
[aCoder decodeValueOfObjCType:@encode(unsigned) at:&cap withName:NULL];
[self initWithCapacity:cap];
[aCoder decodeValueOfObjCType:@encode(char*) at:&_contents_chars
withName:NULL];
_count = strlen(_contents_chars);
_capacity = cap;
return self;
}
/* For IndexedCollecting protocol */
/* Empty copy must empty an allocCopy'ed version of self */
- emptyCopy
{
NSGMutableCString *copy = [super emptyCopy];
OBJC_MALLOC(copy->_contents_chars, char, _count+1);
copy->_count = 0;
copy->_contents_chars[0] = '\0';
return copy;
}
- (char) charAtIndex: (unsigned)index
{
CHECK_INDEX_RANGE_ERROR(index, _count);
return _contents_chars[index];
}
// FOR IndexedCollection and OrderedCollection SUPPORT;
- (void) insertObject: newObject atIndex: (unsigned)index
{
CHECK_INDEX_RANGE_ERROR(index, _count+1);
// one for the next char, one for the '\0';
if (_count+1 >= _capacity)
{
_capacity *= 2;
OBJC_REALLOC(_contents_chars, char, _capacity);
}
stringIncrementCountAndMakeHoleAt((NSGMutableCStringStruct*)self, index, 1);
_contents_chars[index] = [newObject charValue];
_contents_chars[_count] = '\0';
}
- (void) removeObjectAtIndex: (unsigned)index
{
CHECK_INDEX_RANGE_ERROR(index, _count);
stringDecrementCountAndFillHoleAt((NSGMutableCStringStruct*)self, index, 1);
_contents_chars[_count] = '\0';
}
@end
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