153 lines
5.2 KiB
C++
153 lines
5.2 KiB
C++
/*++
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Copyright (c) 1991 Microsoft Corporation
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Module Name:
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strcscmp.cxx
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Abstract:
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This module implements case insensitive string comparison routines.
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Author:
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Mike Massa (mikemas) Sept 20, 1991
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Revision History:
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Who When What
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-------- -------- ----------------------------------------------
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mikemas 9-20-91 created
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Notes:
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Exports:
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None
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--*/
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#include "smtpinc.h"
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#ident "@(#)strcasecmp.c 5.3 3/8/91"
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/******************************************************************
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*
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* SpiderTCP BIND
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*
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* Copyright 1990 Spider Systems Limited
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*
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* STRCASECMP.C
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*
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******************************************************************/
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/*
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* /usr/projects/tcp/SCCS.rel3/rel/src/lib/net/0/s.strcasecmp.c
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* @(#)strcasecmp.c 5.3
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*
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* Last delta created 14:12:01 3/4/91
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* This file extracted 11:20:35 3/8/91
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*
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* Modifications:
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*
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* GSS 24 Jul 90 New File
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*/
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/*
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* Copyright (c) 1987 Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that the above copyright notice and this paragraph are
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* duplicated in all such forms and that any documentation,
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* advertising materials, and other materials related to such
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* distribution and use acknowledge that the software was developed
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* by the University of California, Berkeley. The name of the
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* University may not be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)strcasecmp.c 5.7 (Berkeley) 2/7/89";
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#endif /* LIBC_SCCS and not lint */
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/**************************************************************************/
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#include <winsock.h>
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//#include "winsockp.h"
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/*
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* This array is designed for mapping upper and lower case letter
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* together for a case independent comparison. The mappings are
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* based upon ascii character sequences.
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*/
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static char charmap[] = {
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'\000', '\001', '\002', '\003', '\004', '\005', '\006', '\007',
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'\010', '\011', '\012', '\013', '\014', '\015', '\016', '\017',
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'\020', '\021', '\022', '\023', '\024', '\025', '\026', '\027',
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'\030', '\031', '\032', '\033', '\034', '\035', '\036', '\037',
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'\040', '\041', '\042', '\043', '\044', '\045', '\046', '\047',
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'\050', '\051', '\052', '\053', '\054', '\055', '\056', '\057',
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'\060', '\061', '\062', '\063', '\064', '\065', '\066', '\067',
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'\070', '\071', '\072', '\073', '\074', '\075', '\076', '\077',
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'\100', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
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'\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
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'\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
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'\170', '\171', '\172', '\133', '\134', '\135', '\136', '\137',
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'\140', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
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'\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
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'\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
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'\170', '\171', '\172', '\173', '\174', '\175', '\176', '\177',
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'\200', '\201', '\202', '\203', '\204', '\205', '\206', '\207',
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'\210', '\211', '\212', '\213', '\214', '\215', '\216', '\217',
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'\220', '\221', '\222', '\223', '\224', '\225', '\226', '\227',
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'\230', '\231', '\232', '\233', '\234', '\235', '\236', '\237',
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'\240', '\241', '\242', '\243', '\244', '\245', '\246', '\247',
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'\250', '\251', '\252', '\253', '\254', '\255', '\256', '\257',
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'\260', '\261', '\262', '\263', '\264', '\265', '\266', '\267',
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'\270', '\271', '\272', '\273', '\274', '\275', '\276', '\277',
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'\300', '\301', '\302', '\303', '\304', '\305', '\306', '\307',
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'\310', '\311', '\312', '\313', '\314', '\315', '\316', '\317',
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'\320', '\321', '\322', '\323', '\324', '\325', '\326', '\327',
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'\330', '\331', '\332', '\333', '\334', '\335', '\336', '\337',
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'\340', '\341', '\342', '\343', '\344', '\345', '\346', '\347',
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'\350', '\351', '\352', '\353', '\354', '\355', '\356', '\357',
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'\360', '\361', '\362', '\363', '\364', '\365', '\366', '\367',
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'\370', '\371', '\372', '\373', '\374', '\375', '\376', '\377',
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};
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int
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strcasecmp(
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char *s1,
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char *s2
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)
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{
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register char *cm = charmap,
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*us1 = (char *)s1,
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*us2 = (char *)s2;
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while (cm[*us1] == cm[*us2++])
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if (*us1++ == '\0')
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return(0);
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return(cm[*us1] - cm[*--us2]);
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}
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int
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strncasecmp(
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char *s1,
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char *s2,
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int n
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)
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{
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register char *cm = charmap,
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*us1 = (char *)s1,
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*us2 = (char *)s2;
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while (--n >= 0 && cm[*us1] == cm[*us2++])
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if (*us1++ == '\0')
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return(0);
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return(n < 0 ? 0 : cm[*us1] - cm[*--us2]);
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}
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