d291df1e3f
data structures that scale better with large character sets, instead of arrays indexed by character value: - Sets of characters to delete/squeeze are stored in a new "cset" structure, which is implemented as a splay tree of extents. This structure has the ability to store character classes (ala wctype(3)), but this is not currently fully utilized. - Mappings between characters are stored in a new "cmap" structure, which is also a splay tree. - The parser no longer builds arrays containing all the characters in a particular class; instead, next() determines them on-the-fly using nextwctype(3).
56 lines
2.5 KiB
C
56 lines
2.5 KiB
C
/*-
|
|
* Copyright (c) 1991, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)extern.h 8.1 (Berkeley) 6/6/93
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <limits.h>
|
|
|
|
#define NCHARS_SB (UCHAR_MAX + 1) /* Number of single-byte characters. */
|
|
#define OOBCH -1 /* Out of band character value. */
|
|
|
|
typedef struct {
|
|
enum { STRING1, STRING2 } which;
|
|
enum { EOS, INFINITE, NORMAL, RANGE, SEQUENCE,
|
|
CCLASS, CCLASS_UPPER, CCLASS_LOWER, SET } state;
|
|
int cnt; /* character count */
|
|
wint_t lastch; /* last character */
|
|
wctype_t cclass; /* character class from wctype() */
|
|
wint_t equiv[NCHARS_SB]; /* equivalence set */
|
|
wint_t *set; /* set of characters */
|
|
char *str; /* user's string */
|
|
} STR;
|
|
|
|
wint_t next(STR *);
|
|
int charcoll(const void *, const void *);
|