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/* Callbacks for (NUL-terminated) arrays of `char'.
* Copyright (C) 1996 Free Software Foundation, Inc.
*
* Author: Albin L. Jones <Albin.L.Jones@Dartmouth.EDU>
* Created: Sat Feb 10 22:04:38 EST 1996
* Updated: Mon Mar 11 03:09:33 EST 1996
* Serial: 96.03.11.06
*
* 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. */
/**** Included Headers *******************************************************/
#include <stdlib.h>
#include <Foundation/NSString.h>
#include <gnustep/base/o_cbs.h>
/**** Type, Constant, and Macro Definitions **********************************/
/* FIXME: Is this right?!? */
#define _OBJECTS_NOT_A_CHAR_P_MARKER (const void *)(-1)
const void *o_not_a_char_p_marker = _OBJECTS_NOT_A_CHAR_P_MARKER;
o_callbacks_t o_callbacks_for_char_p =
{
(o_hash_func_t) o_char_p_hash,
(o_compare_func_t) o_char_p_compare,
(o_is_equal_func_t) o_char_p_is_equal,
(o_retain_func_t) o_char_p_retain,
(o_release_func_t) o_char_p_release,
(o_describe_func_t) o_char_p_describe,
_OBJECTS_NOT_A_CHAR_P_MARKER
};
/**** Function Implementations ***********************************************/
size_t
o_char_p_hash(const char *cptr)
{
register const char *s = cptr;
register size_t h = 0;
register size_t c = 0;
while (*s != '\0')
h ^= *(s++) << (c++);
return h;
}
int
o_char_p_compare(const char *cptr, const char *dptr)
{
register const char *s = (char *) cptr;
register const char *t = (char *) dptr;
if (s == t)
{
return 0;
}
else
{
register char c;
register char d;
while ((c = *(s++)) == (d = *(s++)))
if (c == '\0')
return 0;
return (c - d);
}
}
/* Determines whether or not CPTR is the same (`NUL'-terminated)
* character string as DPTR. Returns true if CPTR and DPTR are the same,
* and false otherwise. Note that we are performing no
* internationalization here. CPTR and DPTR are taken to be C strings
* in the default (seven or) eight bit character encoding. */
int
o_char_p_is_equal(const char *cptr, const char *dptr)
{
register const char *s = cptr;
register const char *t = dptr;
if (s == t)
{
return 1;
}
else
{
register char c;
register char d;
while ((c = *(s++)) == (d = *(t++)))
if (c == '\0')
return 1;
return 0;
}
}
const void *
o_char_p_retain(const char *cptr)
{
return (const void *)cptr;
}
void
o_char_p_release(char *cptr)
{
return;
}
NSString *
o_char_p_describe(const char *cptr)
{
/* FIXME: Code this. */
return nil;
}
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