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#if !defined(lint) && !defined(DOS)
static char rcsid[] = "$Id: collate.c 766 2007-10-23 23:59:00Z hubert@u.washington.edu $";
#endif
/*
* ========================================================================
* Copyright 2013-2016 Eduardo Chappa
* Copyright 2006 University of Washington
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* ========================================================================
*/
#include <system.h>
#include "collate.h"
/*
* global hook
*/
int (*pcollator)();
void
set_collation(int collation, int ctype)
{
extern int collator(); /* set to strcoll if available in system.h */
pcollator = strucmp;
#ifdef LC_COLLATE
if(collation){
char *status = NULL;
/*
* This may not have the desired effect, if collator is not
* defined to be strcoll in os.h and strcmp and friends
* don't know about locales. If your system does have strcoll
* but we haven't defined collator to be strcoll in os.h, let us know.
*/
status = setlocale(LC_COLLATE, "");
/*
* If there is an error or if the locale is the "C" locale, then we
* don't want to use strcoll because in the default "C" locale strcoll
* uses strcmp ordering and we want strucmp ordering.
*
* The problem with this is that setlocale returns a string which is
* not equal to "C" on some systems even when the locale is "C", so we
* can't really tell on those systems. On some systems like that, we
* may end up with a strcmp-style collation instead of a strucmp-style.
* We recommend that the users of those systems explicitly set
* LC_COLLATE in their environment.
*/
if(status && !(status[0] == 'C' && status[1] == '\0'))
pcollator = collator;
}
#endif
#ifdef LC_CTYPE
if(ctype){
(void)setlocale(LC_CTYPE, "");
}
#endif
#ifdef LC_TIME
setlocale(LC_TIME, "");
#endif
}
/*
* sstrcasecmp - compare two pointers to strings case independently
*/
int
sstrcasecmp(const qsort_t *s1, const qsort_t *s2)
{
return((*pcollator)(*(char **)s1, *(char **)s2));
}
#ifndef _WINDOWS
/*--------------------------------------------------
A case insensitive strcmp()
Args: o, r -- The two strings to compare
Result: integer indicating which is greater
---*/
int
strucmp(register char *o, register char *r)
{
if(o == NULL){
if(r == NULL)
return 0;
else
return -1;
}
else if(r == NULL)
return 1;
while(*o && *r
&& ((isupper((unsigned char)(*o))
? (unsigned char)tolower((unsigned char)(*o))
: (unsigned char)(*o))
== (isupper((unsigned char)(*r))
? (unsigned char)tolower((unsigned char)(*r))
: (unsigned char)(*r)))){
o++;
r++;
}
return((isupper((unsigned char)(*o))
? tolower((unsigned char)(*o))
: (int)(unsigned char)(*o))
- (isupper((unsigned char)(*r))
? tolower((unsigned char)(*r))
: (int)(unsigned char)(*r)));
}
/*----------------------------------------------------------------------
A case insensitive strncmp()
Args: o, r -- The two strings to compare
n -- length to stop comparing strings at
Result: integer indicating which is greater
----*/
int
struncmp(register char *o, register char *r, register int n)
{
if(n < 1)
return 0;
if(o == NULL){
if(r == NULL)
return 0;
else
return -1;
}
else if(r == NULL)
return 1;
n--;
while(n && *o && *r
&& ((isupper((unsigned char)(*o))
? (unsigned char)tolower((unsigned char)(*o))
: (unsigned char)(*o))
== (isupper((unsigned char)(*r))
? (unsigned char)tolower((unsigned char)(*r))
: (unsigned char)(*r)))){
o++;
r++;
n--;
}
return((isupper((unsigned char)(*o))
? tolower((unsigned char)(*o))
: (int)(unsigned char)(*o))
- (isupper((unsigned char)(*r))
? tolower((unsigned char)(*r))
: (int)(unsigned char)(*r)));
}
#endif
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