michael@0: /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "plstr.h"
michael@0: #include <string.h>
michael@0: 
michael@0: PR_IMPLEMENT(char *)
michael@0: PL_strchr(const char *s, char c)
michael@0: {
michael@0:     if( (const char *)0 == s ) return (char *)0;
michael@0: 
michael@0:     return strchr(s, c);
michael@0: }
michael@0: 
michael@0: PR_IMPLEMENT(char *)
michael@0: PL_strrchr(const char *s, char c)
michael@0: {
michael@0:     if( (const char *)0 == s ) return (char *)0;
michael@0: 
michael@0:     return strrchr(s, c);
michael@0: }
michael@0: 
michael@0: PR_IMPLEMENT(char *)
michael@0: PL_strnchr(const char *s, char c, PRUint32 n)
michael@0: {
michael@0:     if( (const char *)0 == s ) return (char *)0;
michael@0: 
michael@0:     for( ; n && *s; s++, n-- )
michael@0:         if( *s == c )
michael@0:             return (char *)s;
michael@0: 
michael@0:     if( ((char)0 == c) && (n > 0) && ((char)0 == *s) ) return (char *)s;
michael@0: 
michael@0:     return (char *)0;
michael@0: }
michael@0: 
michael@0: PR_IMPLEMENT(char *)
michael@0: PL_strnrchr(const char *s, char c, PRUint32 n)
michael@0: {
michael@0:     const char *p;
michael@0: 
michael@0:     if( (const char *)0 == s ) return (char *)0;
michael@0: 
michael@0:     for( p = s; n && *p; p++, n-- )
michael@0:         ;
michael@0: 
michael@0:     if( ((char)0 == c) && (n > 0) && ((char)0 == *p) ) return (char *)p;
michael@0: 
michael@0:     for( p--; p >= s; p-- )
michael@0:         if( *p == c )
michael@0:             return (char *)p;
michael@0: 
michael@0:     return (char *)0;
michael@0: }