strnpcmp.c revision 3e14f97f673e8a630f076077de35afdd43dc1587
/***********************************************************************
* *
* This software is part of the ast package *
* Copyright (c) 1985-2010 AT&T Intellectual Property *
* and is licensed under the *
* Common Public License, Version 1.0 *
* by AT&T Intellectual Property *
* *
* A copy of the License is available at *
* http://www.opensource.org/licenses/cpl1.0.txt *
* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) *
* *
* Information and Software Systems Research *
* AT&T Research *
* Florham Park NJ *
* *
* Glenn Fowler <gsf@research.att.com> *
* David Korn <dgk@research.att.com> *
* Phong Vo <kpv@research.att.com> *
* *
***********************************************************************/
#pragma prototyped
#include <ast.h>
/*
* path prefix strncmp(3) -- longest first!
*/
int
strnpcmp(register const char* a, register const char* b, size_t n)
{
register const char* e;
e = a + n;
for (;;)
{
if (a >= e)
return 0;
if (*a != *b)
break;
if (!*a++)
return 0;
b++;
}
if (*a == 0 && *b == '/')
return 1;
if (*a == '/' && *b == 0)
return -1;
return (a < b) ? -1 : 1;
}