/*      $NetBSD: cd9660_strings.c,v 1.6 2015/12/24 15:52:37 christos Exp $      */

/*
* Copyright (c) 2005 Daniel Watt, Walter Deignan, Ryan Gabrys, Alan
* Perez-Rathke and Ram Vedam.  All rights reserved.
*
* This code was written by Daniel Watt, Walter Deignan, Ryan Gabrys,
* Alan Perez-Rathke and Ram Vedam.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY DANIEL WATT, WALTER DEIGNAN, RYAN
* GABRYS, ALAN PEREZ-RATHKE AND RAM VEDAM ``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 DANIEL WATT, WALTER DEIGNAN, RYAN
* GABRYS, ALAN PEREZ-RATHKE AND RAM VEDAM 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.
*/

#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#else
#include <sys/mount.h>
#endif

#include <sys/cdefs.h>
#include <sys/param.h>
#include <ctype.h>

#include "makefs.h"
#include "cd9660.h"

#if defined(__RCSID) && !defined(__lint)
__RCSID("$NetBSD: cd9660_strings.c,v 1.6 2015/12/24 15:52:37 christos Exp $");
#endif  /* !__lint */


void
cd9660_uppercase_characters(char *str, size_t len)
{
       size_t p;

       for (p = 0; p < len; p++) {
               if (islower((unsigned char)str[p]) )
                       str[p] -= 32;
       }
}

static inline int
cd9660_is_d_char(char c)
{
       return (isupper((unsigned char)c)
               || c == '_'
               || (c >= '0' && c <= '9'));
}

static inline int
cd9660_is_a_char(char c)
{
       return (isupper((unsigned char)c)
                       || c == '_'
                       || (c >= '%' && c <= '?')
                       || (c >= ' ' && c <= '\"'));
}

/*
* Test a string to see if it is composed of valid a characters
* @param const char* The string to test
* @returns int 1 if valid, 2 if valid if characters are converted to
*              upper case, 0 otherwise
*/
int
cd9660_valid_a_chars(const char *str)
{
       const char *c = str;
       int upperFound = 0;

       while ((*c) != '\0') {
               if (!(cd9660_is_a_char(*c))) {
                       if (islower((unsigned char)*c) )
                               upperFound = 1;
                       else
                               return 0;
               }
               c++;
       }
       return upperFound + 1;
}

/*
* Test a string to see if it is composed of valid d characters
* @param const char* The string to test
* @returns int 1 if valid, 2 if valid if characters are converted to
*                upper case, 0 otherwise
*/
int
cd9660_valid_d_chars(const char *str)
{
       const char *c=str;
       int upperFound = 0;

       while ((*c) != '\0') {
               if (!(cd9660_is_d_char(*c))) {
                       if (islower((unsigned char)*c) )
                               upperFound = 1;
                       else
                               return 0;
               }
               c++;
       }
       return upperFound + 1;
}